CN117145451A - Drilling monitoring and measuring device and ultra-short radius horizontal well blocking removing method - Google Patents

Abstract

Embodiments of the present application provide a drilling monitoring and measuring device and an ultra-short radius horizontal well plugging removal method, and relate to the field of petroleum exploration. Borehole monitoring and measurement devices include: measurement while drilling instruments, measurement while drilling tools and anti-separation components. The anti-separation component is installed in the measurement while drilling instrument. Screw the outer wall of the lower end of the MWD tool into the upper end of the MWD instrument through threads. The outer wall of the lower end of the MWD tool pushes away the anti-separation component. When the MWD tool is completely in place, the anti-separation component returns to its original position. At this time, The anti-separation component locks the MWD tool. Since the MWD tool is unthreaded and needs to move along the axial direction of the MWD instrument, the anti-separation component locks the MWD tool and therefore limits the rotation of the MWD tool. Interlocking reduces the looseness of the connection between the MWD tool and the MWD instrument through the anti-detachment component, and also reduces the detachment between the MWD tool and the MWD instrument.

Description

Borehole monitoring and measuring device and ultra-short radius horizontal well plugging removal method

Technical field

This application relates to the field of petroleum exploration technology, specifically to borehole monitoring and measurement devices and ultra-short radius horizontal well plugging removal methods.

Background technique

Measurement while drilling/logging is an "underground revolution" in drilling technology. Measurement parameters while drilling usually include engineering parameters and geological parameters. Among them, engineering parameters mainly include well inclination, azimuth, tool face, weight on bit, torque, rotation speed, vibration, annulus pressure, temperature, etc. Geological parameters mainly include such as Ma ray, resistivity, density, azimuthal neutron density, neutron porosity, formation pore pressure, etc. Due to the difficulty and poor applicability of integrating downhole MWD instruments and MWD tools, downhole MWD instruments are usually developed into separate modules or drill collar joints. For this reason, in order to upload downhole data in real time through the measurement while drilling tool, a convenient and reliable quick connection joint is needed to connect the downhole measurement while drilling instrument with the measurement while drilling tool, upload the data to the measurement while drilling tool in real time, and then upload it through the signal channel It is further uploaded to surface equipment for decoding to realize real-time upload of underground data.

In the related art, the measurement-while-drilling tool and the measurement-while-drilling instrument of the drilling monitoring and measuring device are connected through threads, which is conducive to the mutual communication and data uploading between the downhole measurement-while-drilling instruments. However, the connection through threads does not require simple threads. Button connection also has the following problems: First, the measurement while drilling tool and the measurement while drilling instrument are prone to loosening during the use of drilling. If the two become loose, it is easy to cause an interference between the measurement while drilling tool and the measurement while drilling instrument. Secondly, if the threads between the MWD tool and the MWD instrument are completely detached, the MWD instrument and MWD tool will fall off, which will easily cause the equipment to be lost, requiring salvage equipment and making the salvage process difficult. And its cost is higher.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a drilling monitoring and measuring device, which has the effect of reducing the loosening of the connection between the measuring while drilling tool and the measuring while drilling instrument, and also has the effect of reducing the loosening of the connection between the measuring while drilling tool and the measuring while drilling instrument. The effect of shedding between.

In a first aspect, embodiments of the present application provide a drilling monitoring and measurement device, including: a measurement while drilling instrument, a measurement while drilling tool, and an anti-separation component.

The outer wall of the lower end of the measurement while drilling tool is threaded into the interior of the upper end of the measurement while drilling instrument. The anti-separation component is installed in the measurement while drilling instrument. The anti-separation component locks the measurement while drilling tool. The inner lower end of the anti-separation component rotates through the measuring-while-drilling instrument.

According to some embodiments of the present application, the measurement while drilling instrument includes a mother drill collar sub, a limit ring and a measuring instrument body. The upper end of the mother drill collar sub is provided with internal threads, and the limit ring is fixed Connected to the inside of the upper end of the mother drill collar sub-section, the internal thread is located on the upper side of the limit ring, the measuring instrument body is disposed inside the mother drill collar sub-section, and the anti-separation component is disposed on the Inside the mother drill collar sub-section, the unlocking point of the anti-separation component rotates through the mother drill collar sub-section.

According to some embodiments of the present application, the measurement while drilling tool includes a male drill collar sub, an external threaded barrel, a locking connection barrel, an annular locking card and a measuring tool body, and the external threaded barrel is fixedly connected to the male drill collar. The lower end of the drill collar sub-section, the locking connection tube is fixedly connected to the lower end of the external thread barrel, the annular locking card is fixedly connected to the lower end of the locking connection tube, and the lower side of the annular locking card is set as a slope surface, the externally threaded barrel is threaded into the internal thread at the upper end of the female drill collar subsection, the measuring tool body is arranged inside the male drill collar subsection, the measuring tool body and the measuring instrument body Connect via electrical connector.

According to some embodiments of the present application, the anti-separation components include hooking locking parts, flexible shaft transmission parts, joint transmission parts, and power transmission parts. The hooking locking parts are arranged at equal intervals on the short collar of the mother drill collar. Inside the joint, the combined transmission part is installed inside the mother drill collar sub-section, and both ends of the combined transmission part are drivingly connected to the two adjacent hooking locking parts through the flexible shaft transmission part. , the remaining hooking locking parts are also drivingly connected to the adjacent hooking locking parts through the flexible shaft transmission part, and the upper end of the hooking locking parts is hooked to the upper side of the annular locking card Locking is formed, the power transmission member rotates through the mother drill collar sub-section, the inner end of the power transmission member is drivingly connected to the combined transmission member, and the outer end of the power transmission member extends to the mother drill collar The outside of the nipple.

According to some embodiments of the present application, the hooking locking member includes a connecting ear plate, a swing hooking rod, a hook, a transmission pin and a torsion spring, and the connecting ear plate is fixedly connected to the inner wall of the female drill collar pup. , the hook is fixedly connected to the upper end of the swing hitch rod, the upper side of the hook is set as a slope surface, the transmission pin is fixedly connected to the lower end of the swing hitch rod, and the transmission pin is rotatably connected to the swing hitch rod. On the connecting ear plate, the torsion spring is sleeved on the transmission pin, and the two ends of the torsion spring are respectively pressed against the swing hooking rod and the mother drill collar sub-section, and the torsion spring pushes the The swing hooking rod moves toward the annular locking card. The slope surface on the lower side of the annular locking card cooperates with the slope surface on the upper side of the hook. The annular locking card can push the hook.

According to some embodiments of the present application, the transmission pin includes a pin body and a limiting plate, the outer wall of the pin body is provided with teeth at equal intervals, and the pin body runs through the connecting ear plate and all The lower end of the swing hooking rod, the pin body can rotate along the connecting lug plate, the teeth are inserted into the lower end of the swing hooking rod, and the teeth limit the rotation of the swinging hooking rod.

According to some embodiments of the present application, the swing hooking rod includes a lower end of an inwardly curved rod body, a mounting groove is provided at the lower end of the lower end of the inwardly curved rod body, the torsion spring is located in the installation groove, and the lower end of the lower end of the inwardly curved rod body is A pin hole is provided, a snap-in groove is provided inside the pin hole, the pin body passes through the pin hole, and the latch teeth are inserted into the snap-in groove.

According to some embodiments of the present application, the combined transmission member includes a first ear plate, a transmission shaft and a first helical gear. The first ear plate is fixedly connected to the inside of the mother drill collar sub-section, and the transmission shaft rotates. Connected between the first ear plates, the first helical gear is fixedly sleeved on the transmission shaft, the power transmission member is connected to the first helical gear through helical gear meshing, and the transmission shaft Both ends are respectively connected to the transmission pins on the adjacent hooking locking parts through the soft shaft transmission parts, and the transmission pins on the other hooking locking parts are also connected through the soft shaft transmission parts. Shaft transmission parts transmission connection.

According to some embodiments of the present application, the flexible shaft transmission member includes a second ear plate, a soft transmission shaft and a limiting block. The second ear plate is fixedly connected to the inner wall of the female drill collar sub-section, and the limiting block The blocks are respectively fixedly connected to the outer walls of the two ends of the soft transmission shaft. The two ends of the soft transmission shaft are fixedly inserted into the second ear plate through tight fitting. The limiting block passes through the second ear plate. Ear plate, the limiting block cooperates with the second ear plate to limit the external rotation of the soft transmission shaft, the transmission pin shaft is provided with first transmission grooves at both ends, and the transmission shaft is provided with a third transmission groove at both ends. Two transmission grooves, the transmission ends at both ends of the soft transmission shaft are respectively inserted into the first transmission groove and the second transmission groove.

According to some embodiments of the present application, the mother drill collar nipple includes a nipple cylinder, a mounting hole is provided on the nipple cylinder, and bearing mounting grooves are provided at both ends of the mounting hole. The mounting holes There are two sealing ring installation grooves inside, and an internal thread groove is provided outside the bearing installation groove on the outer end of the short section cylinder. The power transmission part includes a power shaft, a bearing, a second helical gear and a third A sealing ring, the outer wall of the bearing is inserted into the bearing mounting groove, the first sealing ring is fixedly connected in the sealing ring mounting groove, and the power shaft passes through the bearing and the mounting hole in sequence. The first sealing ring inside, the power shaft presses the first sealing ring through the elastic deformation of the first sealing ring, the second helical gear is fixedly connected to the inner end of the power shaft, so The second helical gear is connected to the first helical gear through helical gear meshing. The outer end of the power shaft is provided with a first tool groove. A sealing cover is threadedly connected to the internal thread groove. The sealing cover seals the The outer end of the power shaft.

According to some embodiments of the present application, a receiving groove is opened outside the internal thread groove, the sealing cover includes a cover body and a sealing thread barrel, the sealing thread barrel is fixedly connected to the inside of the cover body, and the The sealing thread barrel is threadedly connected to the internal thread groove, the cover body is retracted into the accommodation groove, and a second tool slot is provided outside the cover body.

According to some embodiments of the present application, a second sealing groove is provided inside the top end of the mother drill collar subsection, and a second sealing ring is fixedly connected to the second sealing groove. The interior of the upper end of the mother drill collar subsection is A third sealing groove is provided, a third sealing ring is fixedly connected in the third sealing groove, the lower side of the male drill collar sub-section is pressed against the second sealing ring, and the locking connecting tube passes through the second sealing ring. As for the third sealing ring, the outer wall of the locking connection barrel compresses the third sealing ring through elastic deformation.

In a second aspect, embodiments of the present application also provide a method for unblocking ultra-short radius horizontal wells, using the borehole monitoring and measuring device to perform measurements, which includes the following steps:

Step S1: Use the workover rig, drill pipe and deflector to lower the wellbore and transport it to the design depth;

Step S2: Use a power faucet to open the casing window, drill the well to the preset well depth according to the slope length of the whipstock and design requirements, and complete the polishing of the casing window;

Step S3: Use the drilling monitoring and measuring device to measure the wellbore in the deflection section, including the following:

Send the bottom drilling tools from the work string to the window;

The gyroscope is used for multiple positioning measurements and the direction of the motor is determined. According to the design direction, tilt sliding drilling is started. During the process, gyro measurement is required to correct the tilt direction in time, and the drilling monitoring and measuring device is lowered into the borehole to measure and monitor in real time. The borehole monitoring and measuring device measures and collects data that is free from magnetic interference as correct data;

Based on real-time monitoring data and measured data, accurately predict the well inclination and orientation at the end of the deflection section, and complete the operation of the deflection section;

Step S4: Horizontal section drilling, including the following:

Use a mud motor to drill the horizontal section, and adjust the length of the S-135 drill pipe according to the designed length of the horizontal section;

Drill down to a position 5-10 meters above the casing window, and drill into the borehole monitoring and measuring device for measurement;

Continue drilling to the bottom, and adjust the well inclination and orientation to the predicted values based on the well inclination and orientation at the end point of the deflection section;

Use power faucets to rotate the drill to ensure a smooth wellbore;

Accurately control the drilling of the wellbore in the oil layer based on the real-time wellbore trajectory and cuttings logging conditions;

Drill to the completed drilling depth as designed and pull out the drilling tools;

Step S5: Determine the construction displacement and pressure by performing a test injection to assist drainage and increase energy in the horizontal section. Lower the unblocked pipe string to the end depth of the deflection and then lift it up one meter. Close the casing gate and the blowout preventer. The pressure test does not cause any puncture. If there is a leakage, test inject clean water into the target layer and record the injection pressure and displacement;

Step S6: Construction of horizontal section to assist drainage and increase energy;

Step S7: Then squeeze and inject the reactants in sequence. The reactants will generate a large amount of gas under the oil layer conditions, supplement the reservoir energy, reduce the interfacial tension, reduce the viscosity of crude oil, have dispersion and solubility in asphaltene and colloidal organic matter, and fully relieve the blockage of organic matter. Realize liquid extraction and dewatering, and then squeeze and inject replacement liquid to close the well for reaction.

The beneficial effects of this application are: when in use, the outer wall of the lower end of the measurement while drilling tool is threaded into the interior of the upper end of the measurement while drilling instrument, and the outer wall of the lower end of the measurement while drilling tool pushes away the anti-separation component. When the measurement while drilling tool is completely in place, The anti-separation component returns to its original position. At this time, the anti-separation component locks the MWD tool. Since the MWD tool is disengaged from its threads, it needs to move along the axial direction of the MWD instrument. However, the anti-separation component locks the MWD tool, so , restricting the rotation of the measurement while drilling tool to achieve interlocking, reducing the looseness of the connection between the measurement while drilling tool and the measurement while drilling instrument through the anti-separation component, and also reducing the detachment between the measurement while drilling tool and the measurement while drilling instrument.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, therefore This should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic three-dimensional structural diagram of a borehole monitoring and measuring device according to an embodiment of the present application;

Figure 2 is a schematic three-dimensional structural diagram of a measurement while drilling instrument according to an embodiment of the present application;

Figure 3 is a schematic three-dimensional structural diagram of a measurement while drilling tool according to an embodiment of the present application;

Figure 4 is a schematic three-dimensional structural diagram of an anti-off component according to an embodiment of the present application;

Figure 5 is a schematic three-dimensional structural diagram of a hanging locking piece according to an embodiment of the present application;

Figure 6 is an enlarged three-dimensional structural schematic diagram of B in Figure 5 according to an embodiment of the present application;

Figure 7 is a schematic three-dimensional structural diagram of a combined transmission member according to an embodiment of the present application;

Figure 8 is a schematic three-dimensional structural diagram of a flexible shaft transmission member according to an embodiment of the present application;

Figure 9 is an enlarged three-dimensional structural schematic diagram of position A in Figure 1 according to an embodiment of the present application;

Figure 10 is a schematic three-dimensional structural diagram of a power transmission component according to an embodiment of the present application;

Figure 11 is a schematic three-dimensional structural diagram of a sealing cover according to an embodiment of the present application.

Icon: 100-Measurement while drilling; 110-Mother drill collar sub-section; 111-Puppet cylinder; 112-Mounting hole; 113-Bearing installation groove; 114-Seal ring installation groove; 115-Internal thread groove; 116- Accommodation groove; 120-internal thread; 130-limiting ring; 140-second sealing ring; 150-third sealing ring; 160-measuring instrument body; 200-drilling measurement tool; 210-male drill collar sub-section; 220-external thread barrel; 230-locking connection barrel; 240-ring locking card; 250-measuring tool body; 300-anti-loosening component; 310-hook locking piece; 311-connecting ear plate; 312-swing hanger 3121-Lower end inwardly bent rod body; 3122-Mounting groove; 313-Hook; 314-Driving pin; 3141-Pin body; 3142-Latch; 3143-Limiting plate; 315-Torsion spring; 316-No. A transmission groove; 320-soft shaft transmission part; 321-second ear plate; 322-soft transmission shaft; 323-limit block; 330-joint transmission part; 331-first ear plate; 332-drive shaft; 333- First helical gear; 334-second transmission groove; 340-power transmission part; 341-power shaft; 342-bearing; 343-second helical gear; 344-first sealing ring; 345-first tool groove; 350- Sealing cover; 351-cover body; 352-sealing threaded barrel; 353-second tool slot.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the implementation of this application, but not all the implementation. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

The following describes a borehole monitoring and measuring device and an ultra-short radius horizontal well plugging removal method according to embodiments of the present application with reference to the accompanying drawings.

Referring to Figures 1 to 11, a drilling monitoring and measurement device provided according to an embodiment of the present application includes: a measurement-while-drilling instrument 100, a measurement-while-drilling tool 200, and an anti-separation assembly 300.

Specifically, the outer wall of the lower end of the measurement while drilling tool 200 is screwed into the interior of the upper end of the measurement while drilling instrument 100 through threads. The anti-separation component 300 is provided in the measurement while drilling instrument 100. The anti-separation component 300 locks the inner lower end of the measurement while drilling tool 200. , the unlocking point of the anti-separation component 300 rotates through the MWD instrument 100 . When in use, the outer wall of the lower end of the measurement while drilling tool 200 is threaded into the interior of the upper end of the measurement while drilling instrument 100, and the outer wall of the lower end of the measurement while drilling tool 200 pushes away the anti-separation component 300. When the measurement while drilling tool 200 is completely in place, the anti-separation component 300 is pushed away. The assembly 300 returns to its original position. At this time, the anti-separation assembly 300 locks the measurement while drilling tool 200. Since the measurement while drilling tool 200 is disengaged from the thread, it needs to move along the axial direction of the measurement while drilling instrument 100, but the anti-separation assembly 300 locks the measurement while drilling tool 200. The measuring tool 200, therefore, restricts the rotation of the measuring while drilling tool 200 to achieve interlocking. The anti-separation assembly 300 reduces the looseness of the connection between the measuring while drilling tool 200 and the measuring while drilling instrument 100, and also reduces the loosening of the connection between the measuring while drilling tool 200 and the measuring while drilling instrument 100. Measuring instrument 100 falls off between the two.

Please refer to Figures 1 to 2. The measurement while drilling instrument 100 includes a mother drill collar sub-section 110, a limit ring 130 and a measuring instrument body 160. The upper end of the mother drill collar sub-section 110 is provided with internal threads 120 and a limit ring 130. Fixedly connected to the inside of the upper end of the mother drill collar sub-section 110, the internal thread 120 is located on the upper side of the limit ring 130, the measuring instrument body 160 is arranged inside the mother drill collar sub-section 110, and the anti-separation component 300 is arranged on the mother drill collar sub-section 110. Internally, the unlocking point of the anti-separation component 300 rotates through the female drill collar sub-section 110 . The electrical connector of the measuring instrument body 160 is connected to its internal circuit board through a high-temperature resistant signal line.

Referring to Figures 1 to 3, the measurement while drilling tool 200 includes a male drill collar sub-section 210, an external threaded barrel 220, a locking connection barrel 230, an annular locking card 240 and a measuring tool body 250. The external threaded barrel 220 is fixedly connected to The lower end of the male drill collar sub-section 210, the locking connection barrel 230 is fixedly connected to the lower end of the external thread barrel 220, the annular locking card 240 is fixedly connected to the lower end of the locking connection sleeve 230, the lower side of the annular locking card 240 is set as a slope surface, and the outer The threaded barrel 220 is threaded into the internal thread 120 at the upper end of the female drill collar sub 110. The measuring tool body 250 is disposed inside the male drill collar sub 210. The measuring tool body 250 and the measuring instrument body 160 are connected through an electrical connector. The measurement and control electronic circuit system of the measurement while drilling tool is installed in the measurement tool body 250. The electrical connector of the measurement tool body 250 is connected to the measurement and control electronic circuit system of the measurement while drilling tool through a high temperature resistant signal line.

In this embodiment, a second sealing groove is provided inside the top of the mother drill collar sub 110 , a second sealing ring 140 is fixedly connected to the second sealing groove, and a third seal is provided inside the upper end of the mother drill collar sub 110 groove, a third sealing ring 150 is fixedly connected in the third sealing groove, the lower side of the male drill collar nipple 210 is pressed against the second sealing ring 140, the locking connecting tube 230 passes through the third sealing ring 150, and the locking connecting tube The outer wall of 230 compresses the third sealing ring 150 through elastic deformation. As the external thread barrel 220 is screwed into the internal thread 120, the locking connection barrel 230 opens the third sealing ring 150, and the third sealing ring 150 forms a seal through elastic deformation. As the lower end of the external thread barrel 220 resists the limiting ring 130, The anti-separation component 300 resets and locks the upper side of the annular locking card 240, and at the same time, the lower side of the male drill collar sub-section 210 is pressed against the second sealing ring 140 to form a seal, which is sealed by the second sealing ring 140, the thread seal and the third sealing ring. 150 seal, forming multiple seals to reduce the liquid in the external environment from entering the inside of the female drill collar sub-joint 110 and the male drill collar sub-joint 210, causing damage to the components installed inside the female drill collar sub-joint 110 and the male drill collar sub-joint 210.

Please refer to Figures 1 to 4. In the related art, the measurement while drilling tool and the measurement while drilling instrument are locked with each other through the anti-separation assembly. If the multiple locking elements inside the anti-separation assembly are unlocked one by one, firstly, the operation is complicated; Second, unlocking needs to be performed outside the mother drill collar sub-section. Therefore, multiple unlocking components need to be installed on the mother drill collar sub-section, and multiple installation holes need to be opened to connect the inside and outside. The sealing of the internal and external environment is difficult, so how to prevent the drill collar from coming off? Multiple locking elements inside the component are unlocked synchronously, so that the above problem becomes a technical problem that needs to be solved.

In order to solve the above problem, specifically, the anti-separation component 300 includes a hooking locking part 310, a flexible shaft transmission part 320, a combined transmission part 330 and a power transmission part 340. The hooking locking parts 310 are arranged at equal intervals on the female drill collar short Inside the joint 110, the joint transmission part 330 is installed inside the female drill collar sub-section 110. Both ends of the joint transmission part 330 are connected to the two adjacent hooking locking parts 310 through the flexible shaft transmission parts 320, and the remaining hooks are The locking part 310 is also connected to the adjacent hooking locking part 310 through the flexible shaft transmission part 320. The upper end of the hooking locking part 310 is hooked to the upper side of the annular locking card 240 to form a lock, and the power transmission part 340 rotates. Penetrating through the mother drill collar sub-joint 110, the inner end of the power transmission member 340 is drivingly connected to the combined transmission member 330, and the outer end of the power transmission member 340 extends to the outside of the mother drill collar sub-joint 110. The power transmission part 340 drives the combined transmission part 330. The combined transmission part 330 drives the flexible shaft transmission parts 320 at both ends to rotate. The flexible shaft transmission part 320 drives the hooking locking part 310 to rotate. The remaining hooking locking parts 310 pass through the corresponding The adjacent hooking locking part 310 cooperates with the flexible shaft transmission part 320 to drive, so that the hooking locking part 310 swings away from the annular locking card 240, releasing the locking of the annular locking card 240 by the hooking locking part 310, and then unlocking the annular locking card 240. To lock the female drill collar sub-section 110 and the male drill collar sub-section 210, each hooking locking part 310 is driven by a unique power transmission part 340 to achieve synchronous unlocking. Firstly, the operation is simple; secondly, the power transmission part The installation of 340 only needs to open a mounting hole connecting the inside and outside, which facilitates the isolation of the internal and external environments of the female drill collar sub-section 110 and the male drill collar sub-section 210. During the locking operation, the power transmission part 340 is reversed and hooked up. The locking member 310 returns to its original position, and when the externally threaded barrel 220 is screwed into the internal thread 120, the annular locking card 240 pushes the hooking locking member 310 to open, because the transmission principle of the soft transmission shaft on the flexible shaft transmission member 320 is based on elastic deformation. When a soft driveshaft transmits power, it bends to a certain extent, making the power transfer between the drivetrain soft and smooth. The bending of the soft transmission shaft will cause the transmission force to start and stop more slowly, reducing the impact and vibration of the transmission system, thereby protecting the normal operation of the entire system. When the hooking locking part 310 swings, only a slight twist occurs inside the soft transmission shaft, and the swinging of the hooking locking part 310 does not require operating the power transmission part 340 again.

Please refer to Figures 1 to 5. The hooking locking piece 310 includes a connecting ear plate 311, a swing hooking rod 312, a hook 313, a transmission pin 314 and a torsion spring 315. The connecting ear plate 311 is fixedly connected to the female drill collar nipple. 110 inner wall, the hook 313 is fixedly connected to the upper end of the swing hitch rod 312, the upper side of the hook 313 is set as a slope surface, the transmission pin 314 is fixedly penetrated through the lower end of the swing hitch rod 312, and the transmission pin 314 is rotatably connected to the connecting ear plate 311 , the torsion spring 315 is sleeved on the transmission pin 314, and both ends of the torsion spring 315 are pressed against the swing hook rod 312 and the female drill collar sub-section 110 respectively. The torsion spring 315 pushes the swing hook rod 312 to move toward the annular locking card 240. , the slope surface on the lower side of the annular locking card 240 cooperates with the slope surface on the upper side of the hook 313, and the annular locking card 240 can push the hook 313.

Please refer to Figures 1 to 6. The transmission pin 314 includes a pin body 3141 and a limiting plate 3143. The outer wall of the pin body 3141 is provided with teeth 3142 at equal intervals. The pin body 3141 penetrates the connecting ear plate 311 and the swing hanger. At the lower end of the connecting rod 312, the pin body 3141 can rotate along the connecting ear plate 311. The latch teeth 3142 are inserted into the lower end of the swing hitch rod 312, and the latch teeth 3142 limit the rotation of the swing hitch rod 312. The swing hooking rod 312 includes a lower end inwardly curved rod body 3121. A mounting groove 3122 is provided at the lower end of the lower inwardly curved rod body 3121. The torsion spring 315 is located in the installation groove 3122. A pin hole is provided at the lower end of the lower inwardly curved rod body 3121, and a pin hole is provided inside the pin hole. There is a snap-in slot, the pin body 3141 passes through the pin hole, and the snap teeth 3142 are inserted into the snap-in slot. The flexible shaft transmission part 320 drives the transmission pin 314 to rotate, the pin body 3141 and the teeth 3142 drive the lower end inwardly curved rod body 3121 to swing, the lower end inwardly bent rod body 3121 drives the torsion spring 315 to increase the torsional elasticity, and the hook at the top of the lower end inwardly bent rod body 3121 313 gradually leaves the annular locking card 240, and releases the locking of the female drill collar sub-section 110 and the male drill collar sub-section 210.

Please refer to Figures 1 to 7. The combined transmission member 330 includes a first ear plate 331, a transmission shaft 332 and a first helical gear 333. The first ear plate 331 is fixedly connected to the inside of the mother drill collar sub-joint 110, and the transmission shaft 332 is rotationally connected. Between the first ear plates 331, the first helical gear 333 is fixedly sleeved on the transmission shaft 332. The power transmission member 340 is connected to the first helical gear 333 through helical gear meshing. Both ends of the transmission shaft 332 are respectively driven by flexible shafts. The member 320 is drivingly connected to the transmission pin 314 on the adjacent mounting locking member 310 , and the transmission pins 314 on the other mounting locking members 310 are also drivingly connected through the flexible shaft transmission member 320 . The power transmission member 340 drives the first helical gear 333 through the helical gear meshing principle. The first helical gear 333 drives the transmission shaft 332 to rotate, and the transmission shaft 332 drives the flexible shaft transmission member 320 to rotate.

Please refer to Figures 1 to 8. The flexible shaft transmission member 320 includes a second ear plate 321, a soft transmission shaft 322 and a limiting block 323. The second ear plate 321 is fixedly connected to the inner wall of the female drill collar sub-section 110, and the limiting block 323 The two ends of the soft transmission shaft 322 are respectively fixedly connected to the outer walls of the two ends of the soft transmission shaft 322. The two ends of the soft transmission shaft 322 are fixedly inserted into the second ear plate 321 through tight fitting. The limiting block 323 passes through the second ear plate 321. The limiting block 323 cooperates with the second ear plate 321 to limit the external rotation of the soft transmission shaft 322. The transmission pin 314 is provided with first transmission grooves 316 at both ends. The transmission shaft 332 is provided with second transmission grooves 334 at both ends. The soft transmission shaft 322 has two The transmission ends of the two ends are respectively plugged into the first transmission groove 316 and the second transmission groove 334. The position of the soft transmission shaft 322 is limited by the second ear plate 321 and the limiting block 323. The transmission end of one end of the soft transmission shaft 322 is driven by the transmission shaft 332, and the transmission end of the other end of the soft transmission shaft 322 drives the transmission pin 314 to rotate. The transmission pin 314 on the adjacent hooking locking part 310 connected to the flexible shaft transmission part 320 is also driven by the upper transmission method.

Please refer to Figures 1 to 10. The environment outside the MWD tools and MWD instruments is the environment of the oil well, in which there are many pollutants and particles. Liquids from the external environment can easily enter the MWD tools and MWD instruments and easily Damage to its internal components, so how to isolate the internal and external environments has become a technical problem that needs to be solved.

In view of the above problems, in this embodiment, the female drill collar nipple 110 includes a nipple cylinder 111. The nipple cylinder 111 is provided with a mounting hole 112. The mounting hole 112 is provided with bearing mounting grooves 113 at both ends. Inside the mounting hole 112 There are two sealing ring mounting grooves 114, and an internal thread groove 115 is formed on the short cylinder body 111 on the outside of the outer end bearing mounting groove 113. The power transmission part 340 includes a power shaft 341, a bearing 342, a second helical gear 343 and The first sealing ring 344 and the outer wall of the bearing 342 are inserted into the bearing mounting groove 113. The first sealing ring 344 is fixedly connected in the sealing ring mounting groove 114. The power shaft 341 passes through the bearing 342 and the first seal in the mounting hole 112 in turn. ring 344, the power shaft 341 presses the first sealing ring 344 through the elastic deformation of the first sealing ring 344, the second helical gear 343 is fixedly connected to the inner end of the power shaft 341, and the second helical gear 343 is connected to the inner end of the power shaft 341 through helical gear meshing. The first helical gear 333 and the outer end of the power shaft 341 are provided with a first tool groove 345. The internal thread groove 115 is threadedly connected with a sealing cover 350, and the sealing cover 350 seals the outer end of the power shaft 341. When the locking between the male drill collar sub-section 210 and the female drill collar sub-section 110 is released, the hex wrench is used to cooperate with the first tool groove 345 to drive the power shaft 341 to rotate, and the power shaft 341 drives the second helical gear 343. The gear 343 drives the first helical gear 333 through the helical gear meshing principle.

Please refer to Figures 1 to 11. There is a receiving groove 116 on the outside of the internal thread groove 115. The sealing cover 350 includes a cover body 351 and a sealing threaded barrel 352. The sealing threaded barrel 352 is fixedly connected to the inside of the cover body 351. The sealing threaded barrel 352 is threaded Connected to the internal thread groove 115, the cover body 351 is received into the accommodating groove 116, and a second tool slot 353 is provided outside the cover body 351. The second tool slot 353 can be rotated using an Allen wrench. The male drill collar sub-joint 210 and the female drill collar sub-joint 110 are sealed by the second sealing ring 140, the thread seal and the third sealing ring 150 to form multiple seals to reduce the liquid in the external environment from entering the female drill collar sub-joint. 110 and the male drill collar sub 210, causing damage to the components installed inside the female drill collar sub 110 and the male drill collar sub 210, and the mounting hole 112 on the female drill collar sub 110 that connects the inside and outside passes through the double first sealing ring 344 forms two seals to reduce the liquid in the external environment from entering the inside of the female drill collar sub-joint 110 and the male drill collar sub-joint 210, and the sealing threaded barrel 352 is screwed into the internal thread groove 115 at the outer end of the mounting hole 112, and the cover body 351 is included. In the groove 116, the cover body 351 is accommodated in the groove 116 to reduce the external protrusion of the mother drill collar nipple 110, which affects the use. The sealing cover 350 is used for sealing to form an isolation seal. Through the sealing cover 350 and the first The sealing ring 344 forms multiple seals to improve its sealing performance.

Embodiments of the present application also provide a method for unblocking ultra-short radius horizontal wells, using the borehole monitoring and measuring device to perform measurements, which includes the following steps:

Step S1: Use the workover rig, drill pipe and deflector to lower the wellbore and transport it to the design depth;

Step S2: Use a power faucet to open the casing window, drill the well to the preset well depth according to the slope length of the whipstock and design requirements, and complete the polishing of the casing window;

Step S3: Use the drilling monitoring and measuring device to measure the wellbore in the deflection section, including the following:

Send the bottom drilling tools from the work string to the window;

The gyroscope is used for multiple positioning measurements and the direction of the motor is determined. According to the design direction, tilt sliding drilling is started. During the process, gyro measurement is required to correct the tilt direction in time, and the drilling monitoring and measuring device is lowered into the borehole to measure and monitor in real time. The borehole monitoring and measuring device measures and collects data that is free from magnetic interference as correct data;

Based on real-time monitoring data and measured data, accurately predict the well inclination and orientation at the end of the deflection section, and complete the operation of the deflection section;

Step S4: Horizontal section drilling, including the following:

Use a mud motor to drill the horizontal section, and adjust the length of the S-135 drill pipe according to the designed length of the horizontal section;

Drill down to a position 5-10 meters above the casing window, and drill into the borehole monitoring and measuring device for measurement;

Continue drilling to the bottom, and adjust the well inclination and orientation to the predicted values based on the well inclination and orientation at the end point of the deflection section;

Use power faucets to rotate the drill to ensure a smooth wellbore;

Accurately control the drilling of the wellbore in the oil layer based on the real-time wellbore trajectory and cuttings logging conditions;

Drill to the completed drilling depth as designed and pull out the drilling tools;

Step S5: Determine the construction displacement and pressure by performing a test injection to assist drainage and increase energy in the horizontal section. Lower the unblocked pipe string to the end depth of the deflection and then lift it up one meter. Close the casing gate and the blowout preventer. The pressure test does not cause any puncture. If there is a leakage, test inject clean water into the target layer and record the injection pressure and displacement;

Step S6: Construction of horizontal section to assist drainage and increase energy;

Step S7: Then inject the deblocking agent and catalyst in sequence. The deblocking agent and catalyst generate a large amount of gas under the oil layer conditions, supplement the reservoir energy, reduce the interfacial tension, reduce the viscosity of crude oil, and have strong dispersion of asphaltene and colloidal organic matter. and solubility, fully removing the blockage of organic matter to achieve liquid extraction and dewatering, and then squeeze-injecting the replacement liquid to close the well for reaction.

This ultra-short radius horizontal well unblocking method drills a wellbore with a geologically designed length; injects a composite unblocking agent into the horizontal wellbore, reacts at a controllable lower temperature through the action of a catalyst, and generates a large amount of gas. The gas carrying effect removes formation pollution caused by drilling fluid and cuttings during drilling, restores formation permeability, and increases formation elastic energy, thereby taking advantage of the long horizontal section of sidetracking horizontal wells and increasing oil well production. Unplugging and increasing energy in the open hole of an ultra-short radius horizontal well that has been drilled can improve the wellbore integrity and increase the productivity of a single well.

Specifically, the working principle of the drilling monitoring and measuring device and the ultra-short radius horizontal well plugging removal method is as follows: when releasing the locking between the male drill collar sub-section 210 and the female drill collar sub-section 110, use an inner hexagonal wrench to cooperate with the first The tool slot 345 drives the power shaft 341 to rotate, the power shaft 341 drives the second helical gear 343, the second helical gear 343 drives the first helical gear 333 through the helical meshing principle, the first helical gear 333 drives the transmission shaft 332 to rotate, and the soft transmission shaft The position of 322 is limited by the second ear plate 321 and the limit block 323. The transmission end of one end of the soft transmission shaft 322 is driven by the transmission shaft 332. The transmission end of the other end of the soft transmission shaft 322 drives the transmission pin 314 to rotate. Through the soft transmission shaft The transmission pin 314 on the adjacent hooking locking piece 310 connected by 322 is also driven by the upper transmission method. The teeth 3142 on the transmission pin 314 drive the lower end inward curved rod body 3121 to swing, and the lower end inward curved rod body 3121 drives the torsion spring. The torsional elasticity of 315 increases, and the hook 313 on the top of the lower inwardly bent rod body 3121 gradually leaves the annular locking card 240, releasing the locking of the female drill collar sub-section 110 and the male drill collar sub-section 210, and each hooking locking piece 310 passes through the unique The power transmission part 340 is driven to achieve synchronous unlocking. Firstly, the operation is simple. Secondly, the installation of the power transmission part 340 only needs to open an installation hole connecting the inside and outside, which is convenient for the female drill collar sub-section 110 and the male drill collar sub-section. Section 210 isolating internal and external environments. During the locking operation, the power transmission part 340 reverses, and the lower end inwardly bent rod body 3121 and the hook 313 return to their original positions. When the external thread barrel 220 is screwed into the internal thread 120, the slope surface of the annular locking card 240 pushes the slope surface of the hook 313 Open, because the transmission principle of the soft transmission shaft 322 is based on elastic deformation. When a soft driveshaft transmits power, it bends to a certain extent, making the power transfer between the drivetrain soft and smooth. The bending of the soft transmission shaft will cause the transmission force to start and stop more slowly, reducing the impact and vibration of the transmission system, thereby protecting the normal operation of the entire system. When the lower end inwardly curved rod body 3121 pushed by the annular locking card 240 swings, only a slight twist occurs inside the soft transmission shaft. The swing of the lower end inwardly curved rod body 3121 does not require operating the power transmission member 340 again. After the annular locking card 240 passes over the hook 313 , return to the original position under the elastic force of the torsion spring 315, the hook 313 hangs on the upper side of the annular locking card 240, blocking the axial movement of the annular locking card 240, because the measurement while drilling tool 200 is disengaged from the thread and needs to be measured along the drill. The instrument 100 moves axially. Therefore, the rotation of the measurement while drilling tool 200 is restricted to achieve interlocking. By hooking the locking piece 310, the looseness of the connection between the measurement while drilling tool 200 and the measurement while drilling instrument 100 is reduced, and the measurement while drilling tool is also reduced. 200 and MWD 100 between the two.

As the external thread barrel 220 is screwed into the internal thread 120, the locking connection barrel 230 opens the third sealing ring 150, and the third sealing ring 150 forms a seal through elastic deformation. As the lower end of the external thread barrel 220 resists the limiting ring 130, The anti-separation component 300 resets and locks the upper side of the annular locking card 240, and at the same time, the lower side of the male drill collar sub-section 210 is pressed against the second sealing ring 140 to form a seal, which is sealed by the second sealing ring 140, the thread seal and the third sealing ring. 150 seal, forming multiple seals to reduce the liquid in the external environment from entering the inside of the female drill collar sub-joint 110 and the male drill collar sub-joint 210, causing damage to the components installed inside the female drill collar sub-joint 110 and the male drill collar sub-joint 210. The mounting hole 112 on the female drill collar sub-joint 110 that connects the inside and outside forms two seals through the double first sealing rings 344, which reduces the liquid in the external environment from entering the inside of the female drill collar sub-joint 110 and the male drill collar sub-joint 210, and seals the threads. The barrel 352 is screwed into the internal thread groove 115 at the outer end of the mounting hole 112, and the cover body 351 is received into the receiving groove 116, so that the cover body 351 is received into the receiving groove 116, thereby reducing the external protrusion of the mother drill collar nipple 110, which affects the use. , and the sealing cover 350 is used for sealing to form an isolation seal. The sealing cover 350 and the first sealing ring 344 form multiple seals to improve the sealing performance.

The above are only examples of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application. It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

Claims (7)

1. Borehole monitoring and measuring device, characterized by including: Measuring while drilling instrument, the measuring instrument while drilling includes a mother drill collar sub, a limit ring and a measuring instrument body. The upper end of the mother drill collar sub is provided with internal threads, and the limit ring is fixedly connected to the Inside the upper end of the mother drill collar sub-section, the internal thread is located on the upper side of the limit ring, and the measuring instrument body is arranged inside the mother drill collar sub-section; A measurement-while-drilling tool. The outer wall of the lower end of the measurement-while-drilling tool is threaded into the interior of the upper end of the measurement-while-drilling instrument. The measurement-while-drilling tool includes a male drill collar nipple, an external thread barrel, a locking connection barrel, and an annular Locking card and the measuring tool body, the external threaded barrel is fixedly connected to the lower end of the male drill collar sub-section, the locking connection barrel is fixedly connected to the lower end of the externally threaded barrel, the annular locking card is fixedly connected to The lower end of the locking connection barrel, the lower side of the annular locking card is set as a slope surface, the external thread barrel is threaded into the internal thread of the upper end of the female drill collar nipple, and the measuring tool body is arranged on the Inside the male drill collar sub-section, the measuring tool body and the measuring instrument body are connected through an electrical connector; Anti-separation component, the anti-separation component is arranged in the measurement while drilling instrument, the anti-separation component locks the inner lower end of the measurement while drilling tool, and the unlocking point of the anti-separation component rotates through the measurement while drilling tool. Drill measuring instrument, the anti-loosening component includes a hooking locking part, a flexible shaft transmission part, a joint transmission part, and a power transmission part. The hooking locking parts are arranged at equal intervals inside the mother drill collar sub-section, so The combined transmission part is installed inside the mother drill collar sub-section, and both ends of the combined transmission part are drivingly connected to the two adjacent hooking locking parts through the flexible shaft transmission part, and the rest of the The hooking locking piece is also drivingly connected to the adjacent hooking locking piece through the flexible shaft transmission piece, and the upper end of the hooking locking piece is hooked to the upper side of the annular locking card to form a lock. The power transmission member rotates through the mother drill collar sub-section, the inner end of the power transmission member is drivingly connected to the combined transmission member, and the outer end of the power transmission member extends to the outside of the mother drill collar sub-section. 2. The drilling monitoring and measuring device according to claim 1, wherein the hooking and locking member includes a connecting ear plate, a swing hooking rod, a hook, a transmission pin and a torsion spring, and the connecting ear plate Fixedly connected to the inner wall of the female drill collar nipple, the hook is fixedly connected to the upper end of the swing hooking rod, the upper side of the hook is set as a slope surface, and the transmission pin is fixedly penetrated through the swinging hooking rod At the lower end, the transmission pin is rotatably connected to the connecting ear plate, the torsion spring is sleeved on the transmission pin, and the two ends of the torsion spring are respectively pressed against the swing hooking rod and the female Drill collar nipple, the torsion spring pushes the swing hooking rod to move toward the annular locking card, the slope surface on the lower side of the annular locking card cooperates with the slope surface on the upper side of the hook, the annular The locking card can push the hook. 3. The drilling monitoring and measuring device according to claim 2, wherein the transmission pin includes a pin body and a limiting plate, and the outer wall of the pin body is provided with teeth at equal intervals, and the pin The shaft body penetrates the connecting ear plate and the lower end of the swing hooking rod, the pin body can rotate along the connecting ear plate, the teeth are inserted into the lower end of the swing hooking rod, and the teeth limit The rotation of the swing hitch rod. 4. The drilling monitoring and measuring device according to claim 3, characterized in that the swing hooking rod includes a lower end inwardly curved rod body, a mounting groove is opened at the lower end of the lower end inwardly bent rod body, and the torsion spring is located in the said In the installation groove, a pin hole is provided at the lower end of the lower end of the inwardly curved rod body, and a snap slot is provided inside the pin hole. The pin body passes through the pin hole, and the latch teeth are inserted into the latch. into the slot. 5. The drilling monitoring and measuring device according to claim 2, wherein the combined transmission member includes a first ear plate, a transmission shaft and a first helical gear, and the first ear plate is fixedly connected to the female nut. Inside the drill collar sub-section, the transmission shaft is rotatably connected between the first ear plates, the first helical gear is fixedly sleeved on the transmission shaft, and the power transmission member is drivingly connected to the transmission shaft through helical gear meshing. The first helical gear, the two ends of the transmission shaft are respectively connected to the transmission pin on the adjacent hooking locking part through the flexible shaft transmission part, and the remaining hooking locking parts are The transmission pin is also transmission connected through the flexible shaft transmission part. 6. The drilling monitoring and measuring device according to claim 5, wherein the flexible shaft transmission member includes a second ear plate, a soft transmission shaft and a limiting block, and the second ear plate is fixedly connected to the The inner wall of the female drill collar nipple, the limiting blocks are respectively fixedly connected to the outer walls of the two ends of the soft transmission shaft, and the two ends of the soft transmission shaft are fixedly plugged into the second ear plate through tight fitting. The limiting block passes through the second ear plate, and the limiting block cooperates with the second ear plate to limit the external rotation of the soft transmission shaft. First transmission grooves are provided at both ends of the transmission pin shaft. , The two ends of the transmission shaft are respectively provided with second transmission grooves, and the transmission ends at both ends of the soft transmission shaft are respectively plugged into the first transmission groove and the second transmission groove. 7. A method for unblocking ultra-short radius horizontal wells, using the borehole monitoring and measuring device according to any one of claims 1 to 6 for measurement, characterized in that it includes the following steps: Step S1: Use the workover rig, drill pipe and deflector to lower the wellbore and transport it to the design depth; Step S2: Use a power faucet to open the casing window, drill the well to the preset well depth according to the slope length of the whipstock and design requirements, and complete the polishing of the casing window; Step S3: Use the drilling monitoring and measuring device to measure the wellbore in the deflection section, including the following: Send the bottom drilling tools from the work string to the window; The gyroscope is used for multiple positioning measurements and the direction of the motor is determined. According to the design direction, tilt sliding drilling is started. During the process, gyro measurement is required to correct the tilt direction in time, and the drilling monitoring and measuring device is lowered into the borehole to measure and monitor in real time. The borehole monitoring and measuring device measures and collects data that is free from magnetic interference as correct data; Based on real-time monitoring data and measured data, accurately predict the well inclination and orientation at the end of the deflection section, and complete the operation of the deflection section; Step S4: Horizontal section drilling, including the following: Use a mud motor to drill the horizontal section, and adjust the length of the S-135 drill pipe according to the designed length of the horizontal section; Drill down to a position 5-10 meters above the casing window, and drill into the borehole monitoring and measuring device for measurement; Continue drilling to the bottom, and adjust the well inclination and orientation to the predicted values based on the well inclination and orientation at the end point of the deflection section; Use power faucets to rotate the drill to ensure a smooth wellbore; Accurately control the drilling of the wellbore in the oil layer based on the real-time wellbore trajectory and cuttings logging conditions; Drill to the completed drilling depth as designed and pull out the drilling tools; Step S5: Determine the construction displacement and pressure by performing a test injection to assist drainage and increase energy in the horizontal section. Lower the unblocked pipe string to the end depth of the deflection and then lift it up one meter. Close the casing gate and the blowout preventer. The pressure test does not cause any puncture. If there is a leakage, test inject clean water into the target layer and record the injection pressure and displacement; Step S6: Construction of horizontal section to assist drainage and increase energy; Step S7: Then squeeze and inject the reactants in sequence. The reactants will generate a large amount of gas under the oil layer conditions, supplement the reservoir energy, reduce the interfacial tension, reduce the viscosity of crude oil, have dispersion and solubility in asphaltene and colloidal organic matter, and fully relieve the blockage of organic matter. Realize liquid extraction and dewatering, and then squeeze and inject replacement liquid to close the well for reaction.