CN115691239B - Multimedia system for oil and gas drilling tripping demonstration - Google Patents

Abstract

The invention discloses a multimedia system for oil and gas drilling tripping demonstration, which comprises a barrel, a pipe string, a first bulge and a second bulge, a pull rope connected with the pipe string and a power device for winding and unwinding the pull rope, wherein the first bulge is positioned at the bottom end of the pipe string, the second bulge is positioned above the first bulge, the outer diameter of the first bulge is equal to the inner diameter of the pipe string, and the outer diameter of the second bulge is smaller than the inner diameter of the pipe string; the device also comprises a tension sensor and a pressure sensor; the tension sensor is used for monitoring tension of the pull rope, and the pressure sensor is positioned on the bottom surface of the first bulge, the top surface of the first bulge, the side surface of the top surface of the first bulge, the bottom surface of the second bulge and the top surface of the second bulge; the system also comprises a multimedia display device which is in signal connection with the tension sensor and the pressure sensor. The invention is used for solving the problem that teaching equipment capable of demonstrating the drilling tool tripping and blocking process is not available in the prior art, and achieving the purpose of simulating and teaching demonstration on various tripping and blocking processes of a vertical well.

Description

Multimedia system for oil and gas drilling tripping demonstration

Technical Field

The invention relates to the technical field of oil and gas drilling, and in particular to a multimedia system for demonstration of tripping and drilling in oil and gas drilling.

Background technique

In oil and gas drilling construction, drilling is one of the common operation processes. Drilling is a general term for drilling and drilling down. Drilling is the process of lifting the drill bit from the bottom of the well to the top, and drilling down is the process of lowering the drill bit to the bottom of the well from the top. Conventional drilling operations are all done without pumping, that is, drilling directly by gravity, using a lifting system such as a drilling carriage to drill. When drilling encounters resistance or drilling is stuck, the pump is turned on to perform reaming or reverse reaming operations. For rotary table drilling systems that do not use top drives, reverse reaming operations also have the risk of tripping. Therefore, the study of the resistance or stuck mechanism of drilling without pumping is of great significance to both engineering practice and classroom teaching.

For vertical wells, the risk of being stuck by differential pressure is relatively small. Therefore, the drill string generally encounters obstruction or jamming during the drilling process at the drill bit and the stabilizer. There are many possible types of jamming. There is no simple experimental device in the prior art specifically used to simulate and demonstrate this type of drill string jamming.

Summary of the invention

The present invention provides a multimedia system for oil and gas drilling tripping demonstration to solve the problem that there is no teaching equipment in the prior art that can demonstrate the drilling tool tripping and blocking process, and achieves the purpose of simulating and teaching various tripping and blocking processes of vertical wells.

The present invention is achieved through the following technical solutions:

A multimedia system for demonstration of tripping and drilling in oil and gas wells, comprising a barrel for simulating a wellbore, a pipe string located in the barrel, a first protrusion and a second protrusion connected to the pipe string, a pull rope connected to the pipe string, and a power device for retracting and releasing the pull rope, wherein the first protrusion is located at the bottom end of the pipe string, the second protrusion is located above the first protrusion, the outer diameter of the first protrusion is equal to the inner diameter of the barrel, and the outer diameter of the second protrusion is smaller than the inner diameter of the barrel;

It also includes a tension sensor and a pressure sensor; the tension sensor is used to monitor the tension of the pull rope, and the pressure sensor is located on the bottom surface of the first protrusion, the top surface of the first protrusion, the side surface of the top surface of the first protrusion, the bottom surface of the second protrusion, and the top surface of the second protrusion;

The invention also comprises a multimedia display device which is signal-connected to the tension sensor and the pressure sensor.

In view of the problem that there is no teaching equipment in the prior art that can demonstrate the process of drilling tools getting stuck, the present invention proposes a multimedia system for demonstrating drilling tools getting stuck, wherein the cylinder is used to simulate the drilling wellbore, the pipe string is used to simulate the drilling tools, and the pipe string has a first protrusion and a second protrusion, so that the outer diameter of the first protrusion is equal to the inner diameter of the cylinder, and the outer diameter of the second protrusion is smaller than the inner diameter of the cylinder, so that the drill bit is simulated by the first protrusion and the stabilizer is simulated by the second protrusion. The pull rope and the power device are used to simulate the lifting system of the drilling tools. The present application monitors the tension of the pull rope through a tension sensor, and simulates the change of the large hook load through the change of the tension, so as to reflect the overall situation of encountering resistance or getting stuck. A number of pressure sensors are used to reflect the specific force conditions of the first protrusion and the second protrusion when encountering different types of stuck. Among them, the pressure sensors on the second protrusion are located on the top and bottom surfaces to reflect the interaction between the stabilizer and the blocked part. The pressure sensors on the first protrusion are located on the top, bottom and side surfaces. In addition to reflecting the interaction between the drill bit and the blocked part, they can also reflect the interaction with the well wall/formation.

The specific use method of this application includes but is not limited to: according to the different simulation of drilling or drilling down, the pipe string is placed at the bottom of the barrel or lifted out of the barrel in advance, and then the required blocking type is set on the inner wall of the barrel, and then the fluid used to simulate the drilling fluid is injected into the barrel, and then the pipe string is moved up or down in the barrel through the power device and the pull rope. This application transmits the signals of the tension sensor and all pressure sensors to the multimedia display device for display, so that when the common types of stuck drills are encountered during the drilling and drilling down of the vertical well, the load changes in the process of passing through the blocking point and the detailed force changes of the common blocking points can be clearly displayed on the display device, thereby providing a more intuitive and clear display process for teaching such as petroleum engineering, which is conducive to students fully understanding the phenomenon, process and mechanism of drilling tool blocking; in addition, even a large amount of simulation experimental data of drilling and drilling blocking can be provided through this application, thereby providing more basis for analyzing its causes and solutions in actual engineering.

Furthermore, the cylinder includes a rigid inner tube and a flexible inner tube distributed up and down, a rigid outer tube located outside the rigid inner tube, and a flexible outer tube located outside the flexible inner tube; a bottom-closed annulus is formed between the rigid inner tube and the rigid outer tube, and between the flexible inner tube and the flexible outer tube; and a flow channel that runs through from top to bottom is opened on the first protrusion.

This scheme sets the cylinder as an inner and outer double-layer structure, in which the upper part of the inner layer is a rigid inner tube, which is made of rigid materials as the name implies, and is used to simulate the cemented casing section in the wellbore structure. It is generally believed that the drilling tool belongs to the safe well section in the casing section; the lower part of the inner layer is a flexible inner tube, which is made of flexible materials as the name implies, and is used to simulate the uncemented open hole section in the wellbore structure. The annulus of the inner and outer layers is filled with clay or other plastic materials to simulate the formation during operation. The flexible outer tube and the flexible inner tube are deformable as a whole, so the staff can push inward from the outside of the flexible outer tube to squeeze the flexible outer tube, the flexible inner tube and the plastic material therein, so as to shape different types of wellbore blocking points as needed, such as keyways, necking, steps, etc. In addition, the annulus between the rigid outer tube and the rigid inner tube is stable, so that the squeezed plastic material can escape upward into a space with a stable well wall. In addition, the flow channel is used for the passage of fluid simulating drilling fluid.

Furthermore, a third protrusion is provided at the top of the pipe string, and the outer diameter of the third protrusion is equal to the inner diameter of the rigid inner tube. In order to avoid the phenomenon that the first protrusion or the second protrusion is pushed in the opposite direction when the pipe string passes through the artificially simulated blocking point during operation of the present application, causing the entire string to deflect, which is inconsistent with the actual formation, the present solution specially provides a third protrusion at the top of the pipe string, and during normal use, the third protrusion is located inside the rigid inner tube, so that the third protrusion is laterally limited by the rigid inner tube, thereby achieving the purpose of avoiding the overall deflection of the pipe string.

Furthermore, it also includes a bottom plate, and the bottom ends of the flexible inner tube and the flexible outer tube are both sealed and connected to the bottom plate. The bottom plate can block and seal the bottom ends of the flexible inner tube and the flexible outer tube. Of course, the bottom plate and the rigid outer tube and the rigid inner tube can be directly or indirectly fixed relative to each other by any existing method, and the specific connection method is not repeated here.

Furthermore, it also includes a rigid covering member that matches the flexible outer tube, and the rigid covering member is used to cover the outside of the flexible outer tube; the top end of the rigid covering member is detachably connected to the rigid outer tube, and the bottom end of the rigid covering member is detachably connected to the bottom plate.

In the process of filling the annulus with plastic materials such as clay, in order to prevent the clay from squeezing the flexible outer tube and causing it to deform outward, the present solution specially arranges a rigid covering part, which is used to provide rigid support on the outside of the flexible outer tube when filling plastic materials such as clay, so as to prevent it from deforming outward. The rigid covering part matches the flexible outer tube, which means that the shape and size of its inner wall can match the shape and size of the outer wall of the flexible outer tube when it is in a naturally drooping state. In addition, the top and bottom ends of the rigid covering part are detachably connected to the rigid outer tube and the bottom plate, respectively, to facilitate its temporary installation and use. Of course, the specific detachable connection method is not limited here, and any detachable connection method that can be implemented by a person skilled in the art can be adopted, and it is only necessary to achieve a temporary connection between the upper and lower ends of the rigid covering part.

Furthermore, the rigid covering component includes several arc-shaped plates, with first buckles set at both ends of the top of the arc-shaped plates and first clamping blocks set at both ends of the bottom of the arc-shaped plates; the first buckle is used to be clamped with the second buckle on the outer wall of the rigid outer tube; the first clamping block is used to be plugged into the slot on the bottom plate.

The best way for a rigid covering is to be able to completely cover the outside of the flexible outer tube. Therefore, this solution sets the rigid covering as a number of arc-shaped plates, and the arc-shaped plates are spliced in sequence to form an integral annular sleeve structure, thereby achieving complete covering of the flexible outer tube. In addition, this solution sets a number of second buckles on the outer wall of the rigid outer tube, and sets a number of slots on the bottom plate. For each arc-shaped plate, the first buckle on the top and the second buckle can be used to cooperate and snap together to achieve a detachable connection with the rigid outer tube. Similarly, the first card block at the bottom can be inserted into the slot to achieve a detachable connection with the bottom plate. It should be noted that the second buckle on the outer wall of the rigid outer tube and the slot on the bottom plate need to correspond to the number of arc-shaped plates to ensure that each arc-shaped plate can achieve a stable temporary connection, and all the arc-shaped plates can be spliced into an integral annular sleeve.

Furthermore, it also includes an arc-shaped bracket matching the flexible outer tube, an eccentric wheel installed on the arc-shaped bracket, and a first driving device for driving the eccentric wheel to rotate; the arc-shaped bracket is slidably fitted on the guide rail along the longitudinal direction, the top end of the guide rail is detachably connected to the rigid outer tube, and the bottom end of the guide rail is detachably connected to the base plate; it also includes a second driving device for driving the arc-shaped bracket to slide on the guide rail.

In order to reduce the workload and inaccuracy of setting blocking points by manually driving the flexible outer tube, the present solution also provides a mechanism that can automatically push the flexible outer tube inward. Among them, the arc-shaped bracket matches the flexible outer tube, which means that the shape and size of its inner wall can match the shape and size of the outer wall of the flexible outer tube when it is in a naturally drooping state. The arc-shaped bracket can be longitudinally raised and lowered along the guide rail on the outer wall of the flexible outer tube, thereby driving the eccentric wheel mounted thereon to be raised and lowered. The eccentric wheel is driven to rotate by the first driving device, and the shape of the eccentric wheel can be adjusted to adjust the degree of squeezing of the flexible outer tube by the eccentric wheel, thereby obtaining a variety of blocking points such as keyways, neckings, steps, etc. of different depths as needed, significantly improving the simulation effect and accuracy of the present application for blocking when drilling.

In addition, the rotational driving of the eccentric wheel by the first driving device and the lifting and lowering driving of the arc-shaped bracket by the second driving device can both be achieved by using existing technologies.

Furthermore, there are two guide rails, and the two ends of the arc-shaped bracket are respectively slidably fitted on the two guide rails; a third buckle is set at the top of the guide rail and a second clamping block is set at the bottom of the guide rail, and the third buckle is used to be clamped with the second buckle on the outer wall of the rigid outer tube; the second clamping block is used to be plugged into the slot on the bottom plate.

In this solution, a third buckle is arranged on the outer wall of the rigid outer tube and a slot is arranged on the base plate. For the arc-shaped bracket, the third buckle on the top can be engaged with the second buckle to achieve a detachable connection with the rigid outer tube. Similarly, the second clamp block at the bottom can be inserted into the slot to achieve a detachable connection with the base plate.

It should be noted that the arc bracket is installed and used after the arc plate is finished working, so the arc bracket and the arc plate can share the second buckle and the slot, and will not interfere with each other.

Furthermore, it also includes an annular pressure plate that matches the annulus, and the annular pressure plate is connected by a connecting rod. After the clay and other materials are filled into the annulus, due to its loose texture between the flexible inner and outer pipes, it may lead to limited formation simulation effect and enable the first protrusion and the second protrusion to easily pass through the simulated blocking points. In order to overcome this problem, the present scheme also provides an annular pressure plate. Before each demonstration experiment, the annular pressure plate is extended into the annulus from the top, and then driven to rise and fall by driving the connecting rod, so as to compact the clay and other plastic materials in the annulus, significantly improve its density, and thus achieve a more accurate simulation of the wellbore formation. Of course, the driving of the connecting rod in the present scheme can be achieved by manpower or electricity.

Furthermore, the connecting rod includes a plurality of electric telescopic rods evenly distributed in an annular shape, and the electric telescopic rods are installed above the pipe string. This solution realizes the driving of the annular pressure plate through the electric telescopic rod, which can not only effectively reduce the workload of manpower, but also more accurately realize the control of the degree of compaction and density. Of course, the electric telescopic rod can be installed and fixed above the pipe string in any way, and it can be fixed relative to the pipe string or arranged independently. Its specific arrangement has nothing to do with the realization of the technical effect of this solution.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. The multimedia system for demonstration of drilling tool sticking and pulling out of oil and gas wells of the present invention can clearly display the load changes in the process of passing through the blocking points and the detailed force changes of common blocking points on the display device, thereby providing a more intuitive and clear display process for teaching such as petroleum engineering, which is conducive to students' full understanding of the phenomenon, process and mechanism of drill tool sticking; it can also provide a large amount of simulation experimental data of drilling tool sticking and pulling out, thereby providing more reference basis for analyzing its causes and studying its solutions in actual engineering.

2. The multimedia system for demonstration of oil and gas drilling tripping can shape different types of wellbore blocking points as needed, such as keyways, necking, steps, etc. In addition, the annulus between the rigid outer tube and the rigid inner tube is stable, so that the squeezed plastic material can escape upward into a space with a stable well wall.

3. The multimedia system for demonstration of oil and gas drilling tripping can provide rigid support outside the flexible outer tube when filling plastic materials such as clay to prevent it from deforming outward.

4. The multimedia system for demonstrating oil and gas drilling tripping and drilling of the present invention adjusts the degree of squeezing of the flexible outer tube by the eccentric wheel, thereby obtaining various types of blocking points such as keyways, neckings, steps, etc. of different depths as needed, thereby significantly improving the simulation effect and accuracy of the blocking of tripping and drilling.

5. The multimedia system for demonstration of oil and gas drilling tripping can compress plastic materials such as clay in the annulus and significantly improve its density, thereby achieving a more accurate simulation of the well wall formation.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

FIG1 is a cross-sectional view of a specific embodiment of the present invention;

FIG2 is a schematic diagram of the bottom of a rigid outer tube in a specific embodiment of the present invention;

FIG3 is a schematic diagram of the structure of a curved plate in a specific embodiment of the present invention;

FIG4 is a schematic diagram of the structure of an arc-shaped bracket in a specific embodiment of the present invention;

FIG5 is a cross-sectional view of a specific embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of an annular pressure plate in a specific embodiment of the present invention.

Marks and corresponding parts names in the attached drawings:

1-pipe string, 2-first protrusion, 3-second protrusion, 4-pull rope, 5-power device, 6-pressure sensor, 7-multimedia display device, 8-rigid inner tube, 9-flexible inner tube, 10-rigid outer tube, 11-flexible outer tube, 12-annulus, 13-third protrusion, 14-bottom plate, 15-flow channel, 16-arc plate, 17-first buckle, 18-first clamping block, 19-second buckle, 20-slot, 21-arc bracket, 22-eccentric wheel, 23-guide rail, 24-second driving device, 25-second clamping block, 26-annular pressure plate, 27-connecting rod, 28-third buckle, 29-top plate.

Detailed ways

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with examples and drawings. The schematic embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

Embodiment 1:

As shown in FIG1 , a multimedia system for demonstrating oil and gas drilling tripping includes a barrel for simulating a wellbore, a pipe string 1 located in the barrel, a first protrusion 2 and a second protrusion 3 connected to the pipe string 1, a pull rope 4 connected to the pipe string 1, and a power device 5 for retracting and releasing the pull rope 4, wherein the first protrusion 2 is located at the bottom end of the pipe string 1, and the second protrusion 3 is located above the first protrusion 2, the outer diameter of the first protrusion 2 is equal to the inner diameter of the barrel, and the outer diameter of the second protrusion 3 is smaller than the inner diameter of the barrel;

It also includes a tension sensor and a pressure sensor 6; the tension sensor is used to monitor the tension of the pull rope 4, and the pressure sensor 6 is located on the bottom surface of the first protrusion 2, the top surface of the first protrusion 2, the side surface of the top surface of the first protrusion 2, the bottom surface of the second protrusion 3 and the top surface of the second protrusion 3; it also includes a multimedia display device 7 that is signal-connected to the tension sensor and the pressure sensor 6.

The multimedia display device 7 may be a laptop computer, a TV screen or a projector, etc.; the measured data of the tension sensor and each pressure sensor 6 are preferably displayed in the form of a curve graph or a line graph.

In a more preferred embodiment, an acoustic/optical/electrical display system may also be provided, and when the real-time data of a sensor exceeds a set threshold, an acoustic/optical/electrical blockage prompt may be provided accordingly.

Embodiment 2:

A multimedia system for demonstrating oil and gas drilling tripping and drilling, based on Example 1, as shown in Figures 1 and 2, the cylinder includes a rigid inner tube 8 and a flexible inner tube 9 distributed vertically, and a rigid outer tube 10 located outside the rigid inner tube 8, and a flexible outer tube 11 located outside the flexible inner tube 9; a bottom-closed annulus 12 is formed between the rigid inner tube 8 and the rigid outer tube 10, and between the flexible inner tube 9 and the flexible outer tube 11; and a flow channel 15 that passes through the first protrusion 2 from top to bottom is opened.

The top of the pipe string 1 is provided with a third protrusion 13, the outer diameter of which is equal to the inner diameter of the rigid inner pipe 8. A bottom plate 14 is also included, and the bottom ends of the flexible inner pipe 9 and the flexible outer pipe 11 are both sealed and connected to the bottom plate 14.

Preferably, the rigid inner tube 8 and the rigid outer tube 10 can be made of hard transparent materials, such as glass, acrylic, etc. The flexible inner tube 9 and the flexible outer tube 11 can be made of rubber material or plastic material with good plasticity.

Embodiment 3:

The multimedia system for demonstrating oil and gas drilling tripping and drilling, based on Example 1 or Example 2, also includes a rigid covering that matches the flexible outer tube 11, and the rigid covering is used to cover the outside of the flexible outer tube 11; the top end of the rigid covering is detachably connected to the rigid outer tube 10, and the bottom end of the rigid covering is detachably connected to the bottom plate 14.

As shown in Figure 3, the rigid covering component includes a plurality of arc-shaped plates 16, and first buckles 17 are provided at both ends of the top of the arc-shaped plates 16, and first clamping blocks 18 are provided at both ends of the bottom of the arc-shaped plates 16; the first buckle 17 is used to be clamped with the second buckle 19 on the outer wall of the rigid outer tube 10; the first clamping block 18 is used to be plugged into the slot 20 on the bottom plate 14.

It also includes an arc bracket 21 matched with the flexible outer tube 11, an eccentric wheel 22 installed on the arc bracket 21, and a first driving device for driving the eccentric wheel 22 to rotate. As shown in FIG5 , the arc bracket 21 is slidably matched on the guide rail 23 along the longitudinal direction, the top end of the guide rail 23 is detachably connected to the rigid outer tube 10, and the bottom end of the guide rail 23 is detachably connected to the bottom plate 14; it also includes a second driving device 24 for driving the arc bracket 21 to slide on the guide rail 23. There are two guide rails 23, and the two ends of the arc bracket 21 are slidably matched on the two guide rails 23 respectively; a third buckle 28 is provided on the top of the guide rail 23, and a second clamping block 25 is provided on the bottom of the guide rail 23, and the third buckle 28 is used to clamp with the second buckle 19 on the outer wall of the rigid outer tube 10; the second clamping block 25 is used to plug into the slot 20 on the bottom plate 14.

It also includes an annular pressure plate 26 that matches the annular space 12, and the annular pressure plate 26 is connected by a connecting rod 27. The connecting rod 27 includes a plurality of electric telescopic rods evenly distributed in an annular shape, and the electric telescopic rods are installed above the pipe string 1.

In this embodiment, the arc bracket 21 and the arc plate 16 share the second buckle 19 and the slot 20, so the arc bracket 21 and the arc plate 16 have the same curvature and size, and the vertical line between the two guide rails 23 is the chord on the cross section of the arc plate 16. Among them, the temporary buckle connection method of the second buckle 19 and the first buckle 17 and the third buckle 28 can adopt any temporary detachable connection method that can be realized by those skilled in the art, such as overlap, buckle connection or even Velcro bonding.

In this embodiment, as shown in FIG6 , a top plate 29 is also included, which is located directly above the cylinder. The electric telescopic rod is mounted on the top plate 29, and the top plate 29 is also used to mount a fixed pulley for reversing the pull rope 4. Since the electric telescopic rods are evenly distributed in a ring shape, the pull rope 4 can pass between two of the electric telescopic rods without causing interference. The top plate 29 can be fixed in any manner, such as by setting a special rack, a mounting frame that matches and is fixed to the bottom plate, or even by mounting it independently of the bottom plate.

The multimedia system of this embodiment can be used to perform various types of oil and gas drilling tripping demonstrations, and the specific operation steps include:

S1, in the initial state, the tube string 1 moves downward as a whole, so that the first protrusion 2 is located at the bottom end of the flexible inner tube 9;

S2, installing the arc plates 16, and splicing the arc plates 16 into an annular rigid covering member, which is covered on the outside of the flexible outer tube 11;

S3, fill clay into the annulus 12 from the top, start each electric telescopic rod, drive the annular pressing plate 26 to reciprocate downward, and compact the clay in the annulus;

S4, start the power device 5 to make the pipe string 1 move upward as a whole until the first protrusion 2 enters the interior of the rigid inner pipe 8; during this process, the first protrusion and the second protrusion squeeze the clay extending toward the interior of the flexible inner pipe upward into the annulus between the rigid inner pipe and the rigid outer pipe, so that the inner wall of the flexible inner pipe is also flat;

S5, injecting a fluid used to simulate drilling fluid into the rigid inner tube 8, so that the fluid fills all the inner tubes through the flow channel 15;

S6, remove an arc plate 16, and install the integral structure consisting of two guide rails 23 and the arc bracket 21 in its place, as shown in FIG4; before installation, adjust the position of the eccentric wheel 22 and the overall height of the arc bracket 21 so that the protruding part of the eccentric wheel 22 is radially outward to avoid squeezing the flexible outer tube in advance;

S7, start the first driving device, adjust the angle of the eccentric wheel 22 according to the radial depth of the required blocking point; make the eccentric wheel 22 squeeze the flexible outer tube 11, and control its lifting and lowering on the guide rail 23 as needed, such as:

If the purpose is to demonstrate the shrinking block, the eccentric wheel 22 is made to squeeze the flexible outer tube 11 at a specified position, so that the clay and the flexible inner tube 9 inside the outer tube 11 are deformed at the same time, and then the eccentric wheel is reset;

If the keyway is blocked, the eccentric wheel 22 is pressed against the flexible outer tube 11 at a specified position, the angle of the eccentric wheel 22 is kept unchanged, and the arc-shaped bracket 21 and the eccentric wheel 22 are driven by the second driving device 24 to rise and fall as a whole to a set height, and the eccentric wheel is reset after the required keyway is formed;

If the step surface is to be demonstrated, the eccentric wheel 22 starts to squeeze the flexible outer tube 11 at the top or bottom, and the whole is lifted to a set height, and the eccentric wheel is reset after the required step is formed;

S8, start the power device 5 to make the pipe string 1 go down as a whole, demonstrate the obstruction process during the drilling process, and display the measured data of each sensor in real time by the multimedia display device 7 until the pipe string goes down to the bottom;

S9. Similarly, repeat step S7, and then start the power device 5 to make the pipe string 1 move upward as a whole, demonstrate the jamming process during the drilling process, and display the measured data of each sensor in real time on the multimedia display device 7 until the first protrusion 2 moves upward to the inside 8 of the rigid inner pipe.

So far, a complete demonstration of the process of drilling tool encountering resistance and drilling tool getting stuck has been completed. Of course, when this embodiment is used specifically, it can only demonstrate drilling tool getting out of the hole or drilling tool getting stuck in a single operation according to actual needs.

Preferably, an annular pressure plate 26 may be used before each demonstration to make the clay in the annulus dense and stable.

The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

Claims (7)

1. The multimedia system for oil and gas drilling tripping demonstration is characterized by comprising a barrel for simulating a shaft, a pipe string (1) positioned in the barrel, a first bulge (2) and a second bulge (3) connected to the pipe string (1), a pull rope (4) connected with the pipe string (1) and a power device (5) for winding and unwinding the pull rope (4), wherein the first bulge (2) is positioned at the bottom end of the pipe string (1), the second bulge (3) is positioned above the first bulge (2), the outer diameter of the first bulge (2) is equal to the inner diameter of the barrel, and the outer diameter of the second bulge (3) is smaller than the inner diameter of the barrel;

The device also comprises a tension sensor and a pressure sensor (6); the tension sensor is used for monitoring tension of the pull rope (4), and the pressure sensor (6) is positioned on the bottom surface of the first bulge (2), the top surface of the first bulge (2), the side surface of the top surface of the first bulge (2), the bottom surface of the second bulge (3) and the top surface of the second bulge (3);

the device also comprises a multimedia display device (7) which is in signal connection with the tension sensor and the pressure sensor (6);

The cylinder comprises a rigid inner pipe (8), a flexible inner pipe (9) which are vertically distributed, a rigid outer pipe (10) which is positioned outside the rigid inner pipe (8), and a flexible outer pipe (11) which is positioned outside the flexible inner pipe (9); an annular space (12) with a closed bottom is formed between the rigid inner pipe (8) and the rigid outer pipe (10) and between the flexible inner pipe (9) and the flexible outer pipe (11); the first bulge (2) is provided with a runner (15) which is penetrated up and down;

The flexible inner tube (9) and the flexible outer tube (11) are connected with the bottom plate (14) in a sealing way;

The device also comprises an arc-shaped bracket (21) matched with the flexible outer tube (11), an eccentric wheel (22) arranged on the arc-shaped bracket (21) and a first driving device for driving the eccentric wheel (22) to rotate; the arc-shaped support (21) is longitudinally matched with the guide rail (23) in a sliding manner, the top end of the guide rail (23) is detachably connected with the rigid outer tube (10), and the bottom end of the guide rail (23) is detachably connected with the bottom plate (14); the device also comprises a second driving device (24) for driving the arc-shaped bracket (21) to slide on the guide rail (23).

2. The multimedia system for oil and gas drilling tripping demonstration according to claim 1, characterized in that a third bulge (13) is arranged at the top of the string (1), and the outer diameter of the third bulge (13) is equal to the inner diameter of the rigid inner tube (8).

3. The multimedia system for oil and gas drilling tripping demonstration according to claim 1, characterized by further comprising a rigid cladding matching the flexible outer tube (11), the rigid cladding being intended to be clad outside the flexible outer tube (11); the top end of the rigid cladding piece is detachably connected with the rigid outer tube (10), and the bottom end of the rigid cladding piece is detachably connected with the bottom plate (14).

4. A multimedia system for oil and gas drilling tripping demonstration according to claim 3, characterized in that the rigid cladding piece comprises a plurality of arc plates (16), wherein the two ends of the top of the arc plates (16) are provided with first buckles (17), and the two ends of the bottom of the arc plates (16) are provided with first clamping blocks (18); the first buckle (17) is used for being clamped with a second buckle (19) on the outer wall of the rigid outer tube (10); the first clamping block (18) is used for being inserted into a slot (20) on the bottom plate (14).

5. The multimedia system for oil and gas drilling tripping demonstration according to claim 1, wherein the number of the guide rails (23) is two, and two ends of the arc-shaped bracket (21) are respectively in sliding fit on the two guide rails (23); a third buckle (28) is arranged at the top of the guide rail (23), a second clamping block (25) is arranged at the bottom of the guide rail (23), and the third buckle (28) is used for being clamped with the second buckle (19) of the outer wall of the rigid outer tube (10); the second clamping block (25) is used for being inserted into the slot (20) on the bottom plate (14).

6. The multimedia system for oil and gas drilling tripping demonstration according to claim 1, further comprising an annular pressure plate (26) matching the annulus (12), the annular pressure plate (26) being connected by a connecting rod (27).

7. The multimedia system for oil and gas drilling tripping demonstration according to claim 6, characterized in that the connecting rod (27) comprises a plurality of electric telescopic rods distributed in a ring shape, which are installed above the string (1).