CN110043185B - Underground screw motor - Google Patents
Underground screw motor Download PDFInfo
- Publication number
- CN110043185B CN110043185B CN201910419343.4A CN201910419343A CN110043185B CN 110043185 B CN110043185 B CN 110043185B CN 201910419343 A CN201910419343 A CN 201910419343A CN 110043185 B CN110043185 B CN 110043185B
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- screw motor
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- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 21
- 239000010720 hydraulic oil Substances 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 19
- 238000010168 coupling process Methods 0.000 claims description 19
- 238000005859 coupling reaction Methods 0.000 claims description 19
- 230000006698 induction Effects 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 29
- 238000005259 measurement Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A downhole screw motor relates to the technical field of drilling equipment and comprises an upper joint, a stator shell, a rotor, a driving shaft and a lower joint; the lower end of the upper joint is connected with the upper end of the stator shell, the rotor is arranged in the stator shell, and the lower end of the rotor drives the lower joint to rotate through the driving shaft; an upper electric joint assembly is arranged in the upper joint, and a first cable is arranged in the upper electric joint assembly; and a second cable is arranged in the rotor, the lower end of the second cable is electrically connected with a lower electric connector in the lower connector, and the upper end of the second cable is electrically connected with the first cable through an electric transmission assembly. The underground screw motor of this application embodiment can communicate and the power supply with its upper portion and instrument of lower part through its inside cable conductor.
Description
Technical Field
The application relates to the technical field of drilling equipment, in particular to an underground screw motor.
Background
In the drilling operation of directional wells for petroleum exploration and development, a screw motor, a measurement instrument while drilling, a logging instrument while drilling and a rotary steering instrument are widely applied. The following combination modes are adopted in general operation: (1) drilling a well by combining a measurement while drilling instrument and a motor; (2) the measurement while drilling instrument, the logging while drilling instrument and the motor are combined to drill a well; (3) the measurement while drilling instrument, the logging while drilling instrument and the rotary steering instrument are combined to drill a well. In order to effectively improve the drilling efficiency, the prior drilling technology adopts a high-power motor to drive a measurement-while-drilling instrument, a part of the measurement-while-drilling instrument and a rotary steering instrument to drill a well, and the motor can not transmit electric energy and electric signals and can only be placed at the uppermost position of an instrument combination away from the bottom of the well. The combination causes the motor to drive the measurement while drilling instrument, the logging while drilling instrument and the rotary guiding instrument to rotate together, and has the following defects: (1) the drilling tool assembly which needs to be driven to rotate by the rotation of the motor is long, and the driving power is high, so that large pressure drop needs to be generated, and the drilling is very unfavorable; (2) the motor driving shaft bears large load and is easy to damage; (3) limited by the power of the motor, only part of the logging-while-drilling instruments can be driven, so that the application of the logging-while-drilling instruments is limited.
Disclosure of Invention
An embodiment of the present application provides a downhole screw motor, including an upper joint, a stator housing, a rotor, a drive shaft, and a lower joint; the lower end of the upper joint is connected with the upper end of the stator shell, the rotor is arranged in the stator shell, and the lower end of the rotor drives the lower joint to rotate through the driving shaft; an upper electric joint assembly is arranged in the upper joint, and a first cable is arranged in the upper electric joint assembly; and a second cable is arranged in the rotor, the lower end of the second cable is electrically connected with a lower electric connector in the lower connector, and the upper end of the second cable is electrically connected with the first cable through an electric transmission assembly.
Has the advantages that:
the downhole screw motor of the embodiment of the application has a cable penetrating through the interior of the downhole screw motor and is electrically connected with the upper electric connector assembly and the lower electric connector of the downhole screw motor, so that the downhole screw motor of the embodiment of the application can communicate and supply power with instruments on the upper part and the lower part of the downhole screw motor through the cable inside the downhole screw motor. Furthermore, the motor of the embodiment of the application can be connected between the logging-while-drilling instrument and the rotary steering instrument, and the function and the effect of the motor can be better played.
Drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
FIG. 1 is an assembled view of an upper half of a downhole screw motor according to an embodiment of the present application;
FIG. 2 is an overall assembly view of the lower half of a downhole progressive cavity motor according to an embodiment of the present application;
FIG. 3 is a block diagram of the junction of the upper electrical contact assembly and the rotor of the embodiment of FIG. 1;
FIG. 4 is a block diagram of the junction of the upper electrical contact assembly and the rotor of the alternate embodiment of FIG. 1;
the reference signs are: 1. an upper electric connector assembly, 2, an upper connector, 3, an upper flexible shaft, 4, a stator housing, 5, a rotor, 6, a lower flexible shaft, 7, a driving shaft, 8, a lower connector, 9, a first base body, 10, a first cable wire, 11, a primary side transmitting circuit, 12, a positioning pin, 13, an outer induction coupling coil, 14, an inner induction coupling coil, 15, a secondary side receiving circuit, 16, a second base body, 17, a second cable wire, 18, a bearing, 19, a supporting cylinder, 20, an oil injection connector, 21, an outer sleeve, 22, an inner sleeve, 23, an oil passing block, 24, an intermediate connector, 25, a positioning pin, 26, a cable sheath, 27, a spring, 28, a piston, 29, a connecting sleeve, 30, a first conductive ring, 31, a second conductive ring, 32 and a closed cavity.
Detailed Description
The technical scheme of the application is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application.
As shown in fig. 1 and 2, an embodiment of the present application provides a downhole screw motor including an upper joint 2, a stator housing 4, a rotor 5, a driving shaft 7, and a lower joint 8; the lower end of the upper joint 2 is connected with the upper end of the stator shell 4, the rotor 5 is arranged in the stator shell 4, and the lower end of the rotor 5 drives the lower joint 8 to rotate through the driving shaft 7; an upper electric connector assembly 1 is arranged in the upper connector 2, and a first cable 10 is arranged in the upper electric connector assembly 1; a second cable 17 is arranged in the rotor 5, the lower end of the second cable 17 is electrically connected with a lower electric joint in the lower joint 8, and the upper end of the second cable 17 is electrically connected with the first cable 10 through an electric transmission assembly.
The downhole screw motor of the embodiment of the present application has a cable passing through the interior thereof and electrically connected to the upper electrical connector assembly 1 and the lower electrical connector of the motor, so that the downhole screw motor of the embodiment of the present application can communicate and supply power to the upper and lower instruments through the cable inside the downhole screw motor. Furthermore, the motor of the embodiment of the application can be connected between the logging-while-drilling instrument and the rotary guiding instrument, so that power supply and communication between the rotary guiding instrument and the logging-while-drilling instrument are achieved. In addition, the motor of the embodiment of the application can realize the combined drilling of the motor, a rotary steering instrument, a logging-while-drilling instrument and a measuring-while-drilling instrument, and the purpose of efficient drilling is achieved. In addition, the position of the motor in the drilling assembly is more flexible, and the motor can be closer to the drill bit, so that the consumed power of the motor is reduced.
In this embodiment, since the upper electric connector assembly 1 is fixed and the rotor 5 rotates, two ways of implementing the transmission of electric power and signals between the two are available, one is a contact type conductive slip ring structure, and the other is a non-contact type inductively coupled slip ring structure.
As shown in fig. 4, the electrical transmission assembly illustratively includes a first conductive ring 30 and a second conductive ring 31 rotatably fitted and in contact with the first conductive ring 30, the first conductive ring 30 being electrically connected to the first cable wire 10, and the second conductive ring 31 being connected to the rotor 5 and electrically connected to the upper end of the second cable wire 17. The rotating mating surfaces of the first conductive ring 30 and the second conductive ring 31 may be conical surfaces. The first conductive ring 30 can be connected to the upper electric terminal assembly 1 by a connecting assembly, and its position is fixed, while the second conductive ring 31 rotates with the rotor 5.
As shown in fig. 3, by adopting a slip ring structure of non-contact inductive coupling, the electrical transmission assembly exemplarily includes a first substrate 9, a primary side transmitting circuit 11 and an external inductive coupling coil 13 which are disposed on the first substrate 9, a second substrate 16, and a secondary side receiving circuit 15 and an internal inductive coupling coil 14 which are disposed on the second substrate 16; the primary side transmitting circuit 11 is electrically connected with the first cable 10, the secondary side receiving circuit 15 is electrically connected with the upper end of the second cable 17, and the outer induction coupling coil 13 and the inner induction coupling coil 14 rotate relatively and realize electric signal transmission in an electromagnetic coupling mode. The primary side transmitting circuit 11 and the secondary side receiving circuit 15 respectively control the external induction coupling coil 13 and the internal induction coupling coil 14, and the transmission of electric energy and signals is realized in an electromagnetic coupling mode under the condition that the internal induction coupling coil 14 and the external induction coupling coil 13 keep rotating relatively and are not in contact. Wherein the first base 9 is connected to the upper electric joint assembly 1 or the upper joint 2 by a positioning pin 12 so as to be fixed in position, and the second base 16 is connected to an upper end of the rotor 5 so as to rotate together with the rotor 5.
As shown in fig. 4, in this embodiment, a supporting cylinder 19 is further disposed in the upper connector 2, a lower end of the upper electrical connector assembly 1 is hermetically connected to an upper end of the supporting cylinder 19 through a connecting sleeve 29, an upper end of the rotor 5 is rotatably supported in the supporting cylinder 19, an upper portion of the supporting cylinder 19 forms a sealed cavity 32, and the electrical transmission assembly is disposed in the sealed cavity 32. The upper end of the rotor 5 is rotatably supported in the supporting cylinder 19 through a bearing 18, and the closed cavity 32 can be filled with hydraulic oil, which can lubricate the first conductive ring 30 and the second conductive ring 31 of the electric transmission assembly, and the bearing 18.
In the working process of the motor, the pressure of the hydraulic oil in the closed cavity 32 can be gradually increased, and a pressure compensation structure can be arranged to keep the pressure balance between the hydraulic oil in the closed cavity 32 and the mud in the motor shell all the time. Illustratively, the upper electrical connector assembly 1 includes an upper electrical connector base body in which the first cable 10 is disposed, and an outer sleeve 21, the outer sleeve 21 is connected to a lower portion of the upper electrical connector base body and forms an annular space with a closed upper end with the upper electrical connector base body, a lower end of the annular space is communicated with the closed cavity 32, a through hole is formed in an upper end of the outer sleeve 21 located in the annular space (the through hole is used for communicating the annular space above a piston 28 with an inner space of a motor housing, mud in the motor housing can enter the annular space above the piston 28 through the through hole), a spring 27 and the piston 28 are disposed in the annular space, the piston 28 is movably sealed and disposed in the annular space, and one end of the spring 27 is fixed, and the other end abuts against an upper side surface of the piston 28. Therefore, along with the relative rotation between the first conductive ring 30 and the second conductive ring 31, the pressure of the hydraulic oil in the closed cavity 32 will gradually rise, and will push the piston 28 to move upward and compress the spring 27, the piston 28 keeps dynamic sealing in the moving process, under the pressure of the spring 27, the pressures of the hydraulic oil on the upper side and the lower side of the piston 28 acting on the upper side and the lower side of the piston 28 are equal, so as to reach balance, and under the dual actions of the dynamic sealing piston 28 and the spring 27, the pressure of the hydraulic oil in the closed cavity 32 and the pressure of the hydraulic oil in the motor housing always keep balance, so that the motor is in a relatively stable working state. Wherein, the lower end in the annular space can be provided with a limit step for limiting the limit position of the downward movement of the piston 28, so as to prevent the piston 28 from falling out of the annular space.
The inside first wire passing channel and the hydraulic oil channel that are used for holding first cable conductor 10 that are equipped with of upper portion electricity joint base member, the hydraulic oil channel intercommunication first wire passing channel with the oil filler point that sets up on the electricity joint base member of upper portion. Therefore, the first cable 10 can be filled with hydraulic oil to perform a lubricating function. The hydraulic oil passage is also communicated with the closed cavity 32, and hydraulic oil with a certain pressure injected from the oil injection hole can reach the first line passing passage and the closed cavity 32 through the hydraulic oil passage. And the oil filling hole is plugged by a plug after hydraulic oil is injected.
As shown in fig. 4, the upper electrical terminal assembly 1 may include an upper terminal fitting, a grease fitting 20, an outer sleeve 21, an inner sleeve 22, and a cable sheath 26. The upper end of the oil injection joint 20 is hermetically connected with the lower end of the upper end joint, the upper end of the outer sleeve 21 is hermetically connected with the lower end of the oil injection joint 20, and the lower end of the outer sleeve 21 is hermetically connected with the upper end of the support cylinder 19 through the connecting sleeve 29. The inner sleeve 22 is arranged in the outer sleeve 21, the annular space is formed between the outer wall of the inner sleeve 22 and the inner wall of the outer sleeve 21, the upper end of the inner sleeve 22 is in threaded connection with the inner wall of the upper end of the outer sleeve 21 and is arranged in the annular space in a sealing mode (namely, the upper end of the annular space is closed), the spring 27 and the piston 28 are arranged in the annular space, and the limiting step for preventing the piston 28 from falling out of the annular space is arranged on the inner wall of the lower end of the outer sleeve. An oil passing block 23 is installed at the upper end of the inner sleeve 22 in a threaded mode, a cable sheath 26 is installed at the lower end of the inner sleeve 22 in a threaded mode, an intermediate connecting body 24 is installed between the oil passing block 23 and the cable sheath 26, the intermediate connecting body 24 is fixed to the inner sleeve 22 through a positioning pin 25, the lower end of the intermediate connecting body 24 is connected with the upper end of the cable sheath 26 in a threaded mode, and the intermediate connecting body 24 is connected with a first cable 10 which penetrates through the intermediate connecting body in a threaded mode. The first cable wires 10 are passed through the inside of the upper terminal fitting, the oil filling nipple 20, the oil passing block 23, the intermediate connecting body 24 and the cable sheath 26 in this order. An oil filling hole is formed in the oil filling joint 20, and after hydraulic oil injected from the oil filling hole flows out of an oil passing channel in the oil filling joint 20, a part of the hydraulic oil can reach the periphery of the upper section of the first cable 10 through a joint between the lower end of the oil filling joint 20 and the upper end of the oil passing block 23; another part can pass through the oil passage inside the oil block 23 to the annulus between the cable sheath 26 and the inner sleeve 22 and can reach around the lower section of the first cable line 10 and reach said closed cavity 32. The first cable line 10 located above the intermediate connector 24 is an upper stage of the first cable line 10, and the first cable line 10 located below the intermediate connector 24 is a lower stage of the first cable line 10. The first cable wire 10 is passed through the inside of the intermediate connection body 24 and is screwed to the intermediate connection body 24.
As shown in fig. 1 and 2, in the present embodiment, an upper flexible shaft 3 may be connected to an upper end of the rotor 5, and a lower end of the rotor 5 may be connected to the driving shaft 7 by a lower flexible shaft 6. The function of a universal joint of the motor is realized through the lower flexible shaft 6, and the compensation of the eccentric rotary motion of the motor is realized, so that the motor driving shaft 7 at the lower part can stably rotate. The upper flexible shaft 3, the rotor 5, the lower flexible shaft 6 and the driving shaft 7 are all internally provided with wire passing holes for second cables 17 to pass through, and the second cables 17 sequentially pass through the upper flexible shaft 3, the rotor 5, the lower flexible shaft 6 and the driving shaft 7 from top to bottom and then are electrically connected with a lower electric connector in the lower connector 8. The upper flexible shaft 3 and the lower flexible shaft 6 can be made of titanium alloy materials.
In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "connected," "fixedly connected," "mounted," and "assembled" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening elements, or may be connected through the interconnection between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Claims (9)
1. A downhole screw motor, comprising: comprises an upper joint, a stator shell, a rotor, a driving shaft and a lower joint;
the lower end of the upper joint is connected with the upper end of the stator shell, the rotor is arranged in the stator shell, and the lower end of the rotor drives the lower joint to rotate through the driving shaft;
an upper electric joint assembly is arranged in the upper joint, and a first cable is arranged in the upper electric joint assembly;
a second cable is arranged in the rotor, the lower end of the second cable is electrically connected with a lower electric connector in the lower connector, and the upper end of the second cable is electrically connected with the first cable through an electric transmission assembly;
a support cylinder is further arranged in the upper connector, the lower end of the upper electric connector assembly is hermetically connected with the upper end of the support cylinder through a connecting sleeve, the upper end of the rotor is rotatably supported in the support cylinder, a closed cavity is formed in the upper part of the support cylinder, and the electric transmission assembly is arranged in the closed cavity;
the sealed cavity is filled with hydraulic oil, and the upper joint is also internally provided with a pressure compensation structure so that the hydraulic oil in the sealed cavity and the mud in the motor shell keep pressure balance in the working process of the motor.
2. The downhole screw motor of claim 1, wherein: the electric transmission assembly comprises a first conductive ring and a second conductive ring which is rotationally matched with and contacted with the first conductive ring, the first conductive ring is electrically connected with the first cable wire, and the second conductive ring is connected on the rotor and is electrically connected with the upper end of the second cable wire.
3. The downhole screw motor of claim 1, wherein: the electric transmission assembly comprises a first base body, a primary side transmitting circuit, an external induction coupling coil, a second base body, a secondary side receiving circuit and an internal induction coupling coil, wherein the primary side transmitting circuit and the external induction coupling coil are arranged on the first base body;
the primary side transmitting circuit is electrically connected with the first cable, the secondary side receiving circuit is electrically connected with the upper end of the second cable, and the outer induction coupling coil and the inner induction coupling coil rotate relatively and realize electric signal transmission in an electromagnetic coupling mode.
4. The downhole screw motor of claim 3, wherein: the first base is connected to the upper electric joint assembly or the upper joint, and the second base is connected to an upper end of the rotor.
5. The downhole screw motor of claim 1, wherein: the subassembly is connected to upper portion electricity includes that inside is equipped with the upper portion electricity of first cable conductor connects base member and outer sleeve, the outer sleeve connect in the lower part of base member is connected to upper portion electricity and with upper portion electricity is connected and is formed with upper end confined annular space between the base member, the lower extreme of annular space with airtight cavity intercommunication, lie in on the outer sleeve the upper end of annular space is equipped with the through-hole, be equipped with spring and piston in the annular space, the piston movive seal set up in the annular space, spring one end is fixed, other end butt in on the last side of piston, the through-hole is used for making mud in the motor casing gets into the annular space on piston upper portion.
6. The downhole screw motor of claim 5, wherein: and the lower end in the annular space is provided with a limiting step for limiting the limit position of the piston moving downwards.
7. The downhole screw motor of claim 5, wherein: the inside first wire passing channel and the hydraulic oil channel that are used for holding of first cable conductor that is equipped with of upper portion electricity joint base member, the hydraulic oil channel intercommunication first wire passing channel with the oil filler point that sets up on the electricity joint base member of upper portion.
8. The downhole screw motor of claim 1, wherein: the upper end of the rotor is connected with an upper flexible shaft, and the lower end of the rotor is connected with the driving shaft through a lower flexible shaft.
9. The downhole screw motor of claim 8, wherein: the second cable sequentially penetrates through the upper flexible shaft, the rotor, the lower flexible shaft and the driving shaft from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419343.4A CN110043185B (en) | 2019-05-20 | 2019-05-20 | Underground screw motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419343.4A CN110043185B (en) | 2019-05-20 | 2019-05-20 | Underground screw motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110043185A CN110043185A (en) | 2019-07-23 |
| CN110043185B true CN110043185B (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910419343.4A Active CN110043185B (en) | 2019-05-20 | 2019-05-20 | Underground screw motor |
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| Country | Link |
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| CN (1) | CN110043185B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576182B (en) * | 2020-11-30 | 2022-04-12 | 中国石油天然气集团有限公司 | Wire passing motor drilling tool |
| CN112523682B (en) * | 2020-11-30 | 2022-07-19 | 中国石油天然气集团有限公司 | Thread-passing screw drill and thread-passing method |
| CN112483070A (en) * | 2020-12-14 | 2021-03-12 | 奥瑞拓能源科技股份有限公司 | Nearly drill bit position gamma instrument |
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|---|---|---|---|---|
| CN1299915A (en) * | 1998-02-05 | 2001-06-20 | 施卢默格控股有限公司 | Automatically controlled rotation-controllable drilling system and drilling method |
| CN2453165Y (en) * | 2000-09-27 | 2001-10-10 | 贾连英 | Oil prodn. machine with hydraulic transmission screw stem pump |
| CN2556352Y (en) * | 2002-06-26 | 2003-06-18 | 何太银 | Full-automatic hydraulic drilling machine truck for oil and geological prospecting |
| CN103492672A (en) * | 2011-03-30 | 2014-01-01 | 韦尔泰克有限公司 | Downhole pressure compensating device |
| CN106639898A (en) * | 2017-01-04 | 2017-05-10 | 北京赛诺凤凰能源科技有限公司 | Line-passing screw drilling tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080185184A1 (en) * | 2007-02-06 | 2008-08-07 | Maguire James Q | Cryogenic drilling method |
| US8397822B2 (en) * | 2009-03-27 | 2013-03-19 | Baker Hughes Incorporated | Multiphase conductor shoe for use with electrical submersible pump |
-
2019
- 2019-05-20 CN CN201910419343.4A patent/CN110043185B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1299915A (en) * | 1998-02-05 | 2001-06-20 | 施卢默格控股有限公司 | Automatically controlled rotation-controllable drilling system and drilling method |
| CN2453165Y (en) * | 2000-09-27 | 2001-10-10 | 贾连英 | Oil prodn. machine with hydraulic transmission screw stem pump |
| CN2556352Y (en) * | 2002-06-26 | 2003-06-18 | 何太银 | Full-automatic hydraulic drilling machine truck for oil and geological prospecting |
| CN103492672A (en) * | 2011-03-30 | 2014-01-01 | 韦尔泰克有限公司 | Downhole pressure compensating device |
| CN106639898A (en) * | 2017-01-04 | 2017-05-10 | 北京赛诺凤凰能源科技有限公司 | Line-passing screw drilling tool |
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| CN110043185A (en) | 2019-07-23 |
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