A drill pipe connection device for oil extraction

Abstract

This invention discloses a drill pipe connection device for oil extraction, comprising a connecting seat and a fixing seat. Both the connecting seat and the fixing seat have multiple threaded holes on their outer walls, with a limit bolt threaded between adjacent threaded holes. A limit nut is threaded onto the outer wall of the limit bolt. A connecting head is bolted to the top of the fixing seat, and a fixing sleeve is bolted to the bottom of the connecting seat. Reinforcing mechanisms are provided on both sides of the fixing sleeve, each including a clamping plate, a swing plate, a push rod, and a thrust rod. The clamping plate is made of wear-resistant material. An opening is provided on the outer wall of the fixing sleeve, and the opening is fixedly connected to the clamping plate. A cavity is formed inside the clamping plate. This invention facilitates the compression and fixing of the drill pipe's outer wall using a compression ball, thereby improving the drill pipe's fixing effect and preventing wear between the drill pipe and the device due to rotation of the rotating rod, which could cause the rotating rod to slip inside the device and thus affect oil extraction.

Description

Technical Field

[0001] This invention relates to the field of oil extraction, and more particularly to a drill pipe connection device for oil extraction. Background Technology

[0002] Drill pipes are indispensable in the oil extraction process. They are used to drill into the ground with drill bits to facilitate the extraction of underground oil. During the operation of drill pipes, fixing devices are used very frequently. Their main function is to fix the drill pipes in place and prevent them from shaking during rotary drilling.

[0003] A search revealed Chinese patent application CN108071353B, which discloses a drill pipe fixing device for oil extraction. The device includes a fixed through-ring, a protruding ring, a fixed mounting platform, a base, an outer retaining ring, a screw-in ring, threads, an inner retaining ring, a through hole, balls, a mounting groove, a screw-in groove, screw-in bolts, a first cone seat, a mounting plate, a bolt hole, and a second cone seat. The advantages of this invention are: the first and second cone seats jointly fix the drill pipe, ensuring a more secure and stable fixation. The fixed mounting platform and base are screwed together by several screw-in bolts, making installation and disassembly more convenient and quick. When the drill pipe rotates inside the fixed through-ring, the inner retaining ring within the fixed through-ring easily rotates in conjunction with the balls in the mounting groove. Under the force of the drill pipe's rotation, the inner retaining ring rotates synchronously with the drill pipe, improving the service life of the drill pipe and the device. The device is easy to operate, stable, and the connections between its components are flexible.

[0004] Existing equipment often requires fixing the drill pipe during connection. However, during the fixing process, the rotation of the drill pipe can cause wear between the drill pipe and the equipment, resulting in slippage of the drill pipe inside the equipment, which in turn affects oil extraction. Summary of the Invention

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A drill pipe connection device for oil extraction includes a connecting seat and a fixing seat. The outer walls of both the connecting seat and the fixing seat are provided with multiple threaded holes, and a limit bolt is threaded between two adjacent threaded holes. A limit nut is threaded to the outer wall of the limit bolt. A connector is bolted to the top of the fixing seat, and a fixing sleeve is bolted to the bottom of the connecting seat. Reinforcing mechanisms are provided on both sides of the fixing sleeve.

[0007] Preferably, the bottom of the fixing seat is connected to multiple limiting blocks by bolts, and the top of the connecting seat is provided with multiple limiting holes, which are compatible with each other.

[0008] Preferably, the reinforcement mechanism includes a clamping plate, a swing plate, a top rod, and a push rod. The clamping plate is made of wear-resistant material. The outer wall of the fixed sleeve has an opening, which is fixedly connected to the clamping plate. The inside of the clamping plate has a cavity, and the inner wall of the other side of the cavity has an air inlet. A connecting pipe is fixed to the inner wall of the air inlet. A push plate is slidably connected to the inner wall of the connecting pipe near the bottom. A push rod is hinged to one side of the top of the swing plate and the support plate. A top rod is hinged to the other side of the top of the swing plate and the push plate. A connection port is opened at the bottom of the outer wall of the fixed sleeve. A rotating shaft is rotatably connected to the inner walls of the two opposite sides of the connection port through bearings. The two rotating shafts are bolted to the swing plate.

[0009] Preferably, a plurality of connection holes are provided on one side of the inner wall of the cavity, and a protrusion is fixed on the inner wall of each of the plurality of connection holes. A piston plate is slidably connected to the inner wall of the protrusion, and a compression ball is bolted to one side of the piston plate.

[0010] Preferably, a support plate is slidably connected to the inner wall of the fixed sleeve, and a spring is bolted between the bottom of the support plate and the fixed sleeve, and a limit groove is formed on the top of the support plate.

[0011] Preferably, threaded through holes are provided on both sides of the outer wall of the fixing sleeve, and fastening bolts are threadedly connected to the inner walls of the two threaded through holes, with the two fastening bolts symmetrically distributed on both sides of the fixing sleeve.

[0012] Preferably, an anti-slip mechanism is provided between the bottom of the support plate and the bottom inner wall of the fixing sleeve, and the anti-slip mechanism and the reinforcement mechanism cooperate with each other.

[0013] Preferably, the anti-slip mechanism consists of multiple protrusions, which are equidistantly arranged on the side wall of the support plate, and the protrusions are made of hollow elastic material.

[0014] Preferably, an air bladder is provided between the bottom of the support plate and the fixing sleeve, a cavity is provided inside the support plate, an air hole is provided between the cavity and the air bladder, and a guide hole is provided between the cavity and the protrusion.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. This invention, through its reinforced mechanism, involves inserting one end of the drill rod into the fixed sleeve during connection. A support plate supports this end, and under the action of the drill rod, the support plate slides into the fixed sleeve. During this sliding motion, the support plate drives the push rod downwards, causing one end of the swing plate to deflect downwards under the push rod's action, while the other end deflects upwards under the action of the rotating shaft. This upward deflection of the swing plate then drives the push rod upwards, pushing the push plate to slide inside the connecting tube. At this point, the connecting tube... The air pressure in the part increases as the push plate slides, and the gas inside the connecting pipe is transported to the cavity under the action of air pressure. At this time, the air pressure inside the cavity increases with the input of gas, and the piston plate pushes the extrusion ball to move to one side of the drill rod under the action of air pressure. At this time, the extrusion ball will be in close contact with the outer wall of the drill rod, so as to extrude and fix the outer wall of the drill rod by extrusion ball, thereby improving the fixing effect of the drill rod and preventing wear between the drill rod and the device due to the rotation of the rotating rod, so as to prevent the rotating rod from slipping inside the device and thus affecting oil extraction.

[0017] 2. The present invention utilizes an anti-slip mechanism. When one end of the drill rod contacts the support plate, the support plate slides into the fixed sleeve under the action of the drill rod. During this sliding motion, the support plate compresses the air bladder. The gas inside the air bladder, after being compressed, is transported to the interior of the chamber through the air hole. At this time, the air pressure inside the chamber increases, and the protrusion bulges under the action of air pressure. The bulging protrusion adheres tightly to the outer wall of the drill rod. Thus, the drill rod can be effectively fixed through the cooperation of multiple protrusions, thereby improving the stability of the drill rod fixation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a drill pipe connection device for oil extraction proposed in this invention.

[0019] Figure 2 This is a cross-sectional structural schematic diagram of a drill pipe connection device for oil extraction proposed in this invention;

[0020] Figure 3 This is a partial structural schematic diagram of a drill pipe connection device for oil extraction proposed in this invention;

[0021] Figure 4 This is a schematic diagram of the fixing sleeve structure of a drill pipe connection device for oil extraction proposed in this invention;

[0022] Figure 5 This is a cross-sectional schematic diagram of the fixing sleeve structure of a drill pipe connection device for oil extraction proposed in this invention;

[0023] Figure 6 This is a schematic diagram of a reinforcement mechanism for a drill pipe connection device for oil extraction proposed in this invention.

[0024] Figure 7 This is a schematic diagram of the anti-slip mechanism of a drill pipe connection device for oil extraction proposed in this invention.

[0025] In the attached diagram: 1. Connecting seat; 2. Fixed seat; 3. Limiting bolt; 4. Connecting head; 5. Fixing sleeve; 6. Reinforcing mechanism; 7. Through port; 8. Fastening bolt; 9. Anti-slip mechanism; 10. Limiting block; 11. Limiting hole; 12. Limiting nut; 13. Connecting port; 14. Clamping plate; 15. Cavity; 16. Protrusion; 17. Piston plate; 18. Connecting pipe; 19. Extrusion ball; 20. Push plate; 21. Top rod; 22. Swing plate; 23. Rotating shaft; 24. Push rod; 25. Support plate; 26. Protrusion; 27. Chamber; 28. Inflatable bladder; 29. ​​Air hole. Detailed Implementation

[0026] Example 1

[0027] Reference Figure 1-6 A drill pipe connection device for oil extraction includes a connecting seat 1 and a fixed seat 2. The outer walls of both the connecting seat 1 and the fixed seat 2 are provided with multiple threaded holes, and a limit bolt 3 is threadedly connected between two adjacent threaded holes. A limit nut 12 is threadedly connected to the outer wall of the limit bolt 3. A connector 4 is bolted to the top of the fixed seat 2, and a fixing sleeve 5 is bolted to the bottom of the connecting seat 1. Reinforcing mechanisms 6 are provided on both sides of the fixing sleeve 5.

[0028] Based on the above, the bottom of the fixed base 2 is connected to multiple limiting blocks 10 by bolts, and the top of the connecting base 1 is provided with multiple limiting holes 11, which are compatible with the limiting blocks 10.

[0029] Based on the above, the reinforcement mechanism 6 includes a clamping plate 14, a swing plate 22, a top rod 21, and a push rod 24. The clamping plate 14 is made of wear-resistant material. The outer wall of the fixing sleeve 5 has an opening 7, which is fixedly connected to the clamping plate 14. The inside of the clamping plate 14 has a cavity 15, and the inner wall of the other side of the cavity 15 has an air inlet. A connecting pipe 18 is fixed to the inner wall of the air inlet. A push plate 20 is slidably connected to the inner wall of the connecting pipe 18 near the bottom. The top side of the swing plate 22 is hinged to the support plate 25 via a push rod 24. 4. A top rod 21 is hinged to the push plate 20 on the other side of the top of the swing plate 22. A connection port 13 is provided on the outer wall of the fixed sleeve 5 at the bottom. A rotating shaft 23 is rotatably connected between the inner walls of opposite sides of the connection port 13 via bearings. The two rotating shafts 23 are bolted to the swing plate 22. When connecting the drill rod, one end of the drill rod is inserted into the fixed sleeve 5, and the support plate 25 supports one end of the drill rod. The support plate 25 will move towards the fixed sleeve 5 under the action of the drill rod. During internal sliding, the support plate 25 moves the push rod 24 downwards, while one end of the swing plate 22 deflects downwards under the action of the push rod 20, and the other end of the swing plate 22 deflects upwards under the action of the rotating shaft 23. This upward deflection of the other end of the swing plate 22 causes the push rod 21 to push the push plate 20 upwards, causing it to slide inside the connecting pipe 18. At this time, the air pressure inside the connecting pipe 18 increases with the sliding of the push plate 20, and the gas inside the connecting pipe 18 is affected by this air pressure. The gas is fed into the cavity 15. At this time, the air pressure inside the cavity 15 increases with the input of gas. Under the action of air pressure, the piston plate 17 pushes the extrusion ball 19 to one side of the drill pipe. At this time, the extrusion ball 19 will be pressed tightly against the outer wall of the drill pipe, so as to extrude and fix the outer wall of the drill pipe through the extrusion ball 19, thereby improving the fixing effect of the drill pipe and preventing wear between the drill pipe and the device due to the rotation of the rotating rod, so that the rotating rod will slip inside the device and thus affect the oil extraction.

[0030] Based on the above, a plurality of connection holes are provided on one side of the inner wall of the cavity 15, and a protrusion 16 is fixed on the inner wall of each of the plurality of connection holes. A piston plate 17 is slidably connected to the inner wall of the protrusion 16, and a compression ball 19 is bolted to one side of the piston plate 17.

[0031] Based on the above, a support plate 25 is slidably connected to the inner wall of the fixed sleeve 5, and a spring is bolted between the bottom of the support plate 25 and the fixed sleeve 5. A limit groove is provided on the top of the support plate 25.

[0032] Based on the above, threaded through holes are provided on both sides of the outer wall of the fixed sleeve 5, and fastening bolts 8 are threadedly connected to the inner walls of the two threaded through holes. The two fastening bolts 8 are symmetrically distributed on both sides of the fixed sleeve 5.

[0033] Example 2

[0034] Reference Figure 1-7 A drill pipe connection device for oil extraction, compared with Embodiment 1, includes a connecting seat 1 and a fixing seat 2. The outer walls of both the connecting seat 1 and the fixing seat 2 are provided with multiple threaded holes, and a limit bolt 3 is threadedly connected between two adjacent threaded holes. A limit nut 12 is threadedly connected to the outer wall of the limit bolt 3. A connector 4 is bolted to the top of the fixing seat 2, and a fixing sleeve 5 is bolted to the bottom of the connecting seat 1. Reinforcing mechanisms 6 are provided on both sides of the fixing sleeve 5.

[0035] Based on the above, an anti-slip mechanism 9 is provided between the bottom of the support plate 25 and the bottom inner wall of the fixing sleeve 5, and the anti-slip mechanism 9 cooperates with the reinforcement mechanism 6.

[0036] Based on the above, the anti-slip mechanism 9 is composed of multiple protrusions 26, and the multiple protrusions 26 are equally spaced on the side wall of the support plate 25. The protrusions 26 are made of hollow elastic material.

[0037] Based on the above, an air bladder 28 is provided between the bottom of the support plate 25 and the fixed sleeve 5. A chamber 27 is opened inside the support plate 25. An air hole 29 is opened between the chamber 27 and the air bladder 28. A guide hole is opened between the chamber 27 and the protrusion 26. When one end of the drill rod contacts the support plate 25, the support plate 25 will slide into the fixed sleeve 5 under the action of the drill rod. At this time, the support plate 25 will squeeze the air bladder 28 when it slides. The gas inside the air bladder 28 will be transported into the chamber 27 through the air hole 29 after being squeezed. At this time, the air pressure inside the chamber 27 will increase. The protrusion 26 will bulge under the action of air pressure. The bulging protrusion 26 will stick tightly to the outer wall of the drill rod. Thus, the drill rod can be effectively fixed by the cooperation of multiple protrusions 26, so as to improve the stability of the drill rod fixation.

[0038] In summary, with the aid of the above-mentioned technical solution of the present invention: when connecting the drill rod, one end of the drill rod is inserted into the inside of the fixed sleeve 5, and the support plate 25 supports one end of the drill rod. The support plate 25 slides into the inside of the fixed sleeve 5 under the action of the drill rod. At this time, when the support plate 25 slides, it will drive the push rod 24 to move downward, and one end of the swing plate 22 will deflect downward under the action of the push rod 24. The other end of the swing plate 22 will deflect upward under the action of the rotating shaft 23. At this time, when the other end of the swing plate 22 deflects upward, it will drive the top rod 21 to push the push plate 20 upward to slide inside the connecting pipe 18. At this time, the air pressure inside the connecting pipe 18 will increase with the sliding of the push plate 20, and the gas inside the connecting pipe 18 will be transported to the inside of the cavity 15 under the action of air pressure. At this time, the air pressure inside the cavity 15 will increase with the input of gas, and the piston plate 17 will be pushed and squeezed under the action of air pressure. Ball 19 moves towards one side of the drill pipe. At this time, the extrusion ball 19 will be pressed tightly against the outer wall of the drill pipe, so as to press and fix the outer wall of the drill pipe through the extrusion ball 19, thereby improving the fixing effect of the drill pipe and preventing wear between the drill pipe and the device due to the rotation of the drill pipe, which would cause the drill pipe to slip inside the device and thus affect oil extraction. When one end of the drill pipe contacts the support plate 25, the support plate 25 will slide into the fixed sleeve 5 under the action of the drill pipe. At this time, the support plate 25 will squeeze the air bladder 28 when it slides. The gas inside the air bladder 28 will be transported into the cavity 27 through the air hole 29 after being squeezed. At this time, the air pressure inside the cavity 27 will increase, and the protrusion 26 will bulge under the action of air pressure. The bulging protrusion 26 will be pressed tightly against the outer wall of the drill pipe. Thus, the drill pipe can be effectively fixed through the cooperation of multiple protrusions 26, so as to improve the stability of the drill pipe fixing.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A drill pipe connection device for oil extraction, comprising a connecting seat (1) and a fixing seat (2), characterized in that, The outer walls of the connecting seat (1) and the fixed seat (2) are provided with multiple threaded holes, and a limit bolt (3) is threaded between two adjacent threaded holes. The outer wall of the limit bolt (3) is threaded with a limit nut (12). The top of the fixed seat (2) is connected to a connector (4) by bolts. The bottom of the connecting seat (1) is connected to a fixing sleeve (5) by bolts. Both sides of the fixing sleeve (5) are provided with a reinforcing mechanism (6). The inner wall of the fixed sleeve (5) is slidably connected to a support plate (25), and the bottom of the support plate (25) and the fixed sleeve (5) are connected by a spring through bolts. A limit groove is opened on the top of the support plate (25). An anti-slip mechanism (9) is provided between the bottom of the support plate (25) and the bottom inner wall of the fixing sleeve (5), and the anti-slip mechanism (9) cooperates with the reinforcement mechanism (6). The anti-slip mechanism (9) is composed of multiple protrusions (26), and the multiple protrusions (26) are equally spaced on the side wall of the support plate (25). The protrusions (26) are made of hollow elastic material. An air bladder (28) is provided between the bottom of the support plate (25) and the fixing sleeve (5). A cavity (27) is opened inside the support plate (25). An air hole (29) is opened between the cavity (27) and the air bladder (28). A guide hole is opened between the cavity (27) and the protrusion (26). When one end of the drill rod contacts the support plate (25), the support plate (25) will slide into the fixed sleeve (5) under the action of the drill rod. At this time, the support plate (25) will squeeze the air bladder (28) when it slides. The gas inside the air bladder (28) will be transported to the inside of the chamber (27) through the air hole (29) after being squeezed. At this time, the air pressure inside the chamber (27) will increase, and the protrusion (26) will bulge under the action of the air pressure. The bulging protrusion (26) will stick tightly to the outer wall of the drill rod. Thus, the drill rod can be effectively fixed by the cooperation of multiple protrusions (26) to improve the stability of the drill rod fixation.

2. The drill pipe connection device for oil extraction according to claim 1, characterized in that, The bottom of the fixed seat (2) is connected to multiple limiting blocks (10) by bolts, and the top of the connecting seat (1) is provided with multiple limiting holes (11), which are compatible with each other.

3. A drill pipe connection device for oil extraction according to claim 1, characterized in that, The reinforcement mechanism (6) includes a clamping plate (14), a swing plate (22), a top rod (21), and a push rod (24). The clamping plate (14) is made of wear-resistant material. The outer wall of the fixing sleeve (5) has an opening (7), which is fixedly connected to the clamping plate (14). The inside of the clamping plate (14) has a cavity (15), and the inner wall of the cavity (15) has an air inlet. The inner wall of the air inlet is fixed with a connecting pipe (18), and the inner wall of the connecting pipe (18) is slidably connected near the bottom. There is a push plate (20), and a push rod (24) is hinged to the top side of the swing plate (22) and the support plate (25). A top rod (21) is hinged to the other side of the top of the swing plate (22) and the push plate (20). A connection port (13) is opened on the outer wall of the fixed sleeve (5) at the bottom. A rotating shaft (23) is rotatably connected between the inner walls of the two opposite sides of the connection port (13) through a bearing. The two rotating shafts (23) are connected to the swing plate (22) by bolts.

4. A drill pipe connection device for oil extraction according to claim 3, characterized in that, The cavity (15) has multiple connecting holes on one side of its inner wall, and the inner walls of the multiple connecting holes are all fixed with protrusions (16). The inner walls of the protrusions (16) are slidably connected to a piston plate (17), and a compression ball (19) is connected to one side of the piston plate (17) by bolts.

5. A drill pipe connection device for oil extraction according to claim 1, characterized in that, Both sides of the outer wall of the fixed sleeve (5) are provided with threaded through holes, and the inner walls of the two threaded through holes are threaded with fastening bolts (8). The two fastening bolts (8) are symmetrically distributed on both sides of the fixed sleeve (5).

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