Anti-locking drilling tool for coiled tubing operation

Abstract

The utility model provides an anti-lock drilling tool for coiled tubing operation, and relates to the technical field of oil-gas exploration and development. The anti-lock drilling tool comprises a drilling tool main body, a first flexible shaft universal shaft and a spiral rotor, and the driving shaft, the first flexible shaft universal shaft and the spiral rotor are jointly sleeved with a first shell; the anti-locking assembly comprises an anti-falling connecting rod, a second flexible shaft cardan shaft and a first adjusting piece, the anti-falling connecting rod is connected with the spiral rotor, the anti-falling connecting rod, the second flexible shaft cardan shaft and the first adjusting piece are jointly sleeved with a second shell, and the opposite ends of the second shell and the first shell are connected in a sealed mode; the end, away from the anti-falling connecting rod, of the first adjusting piece is rotationally connected with a second adjusting piece, the first adjusting piece and the second adjusting piece are connected to form an adjusting cavity, and a first through hole and a second through hole are formed in the outer side of the first adjusting piece and the outer side of the second adjusting piece correspondingly. And the connecting joint is provided with a flow guide channel communicated with the adjusting cavity. The coiled tubing locking device can prevent the coiled tubing from being locked during operation.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas exploration and development, in particular to an anti-locking drill tool for continuous oil pipe operation. Background Art

[0002] Coiled tubing has good flexibility. A coiled tubing can be several thousand meters long, so it is also called coiled tubing. Coiled tubing equipment has the characteristics of pressure operation, continuous tripping, low damage to the formation, small equipment size, fast operation cycle, low cost, etc. It can replace conventional tubing to complete many operations. It is widely used in oil and gas field well repair, drilling, completion, logging and other operations, and runs through the entire process of oil and gas production. Screw drilling tools are the main downhole power tools for coiled tubing operations. They can use the high-pressure mud pressed from the wellhead through the inner hole of the drill pipe as the power liquid, and convert the pressure energy of the high-pressure mud into the mechanical energy of the drill bit rotation.

[0003] When using continuous tubing for well washing, scraping, and sound amplitude measurement in long horizontal sections, the friction between the tubing and the well wall increases due to the bending and spiral deformation of the tubing body. The drilling pressure applied to the tubing is offset by the friction, resulting in the inability of the continuous tubing to be pushed in the horizontal section during continuous tubing operations, resulting in a self-locking phenomenon. Utility Model Content

[0004] The utility model aims to provide an anti-locking drill tool for coiled tubing operation, aiming to solve the technical problems in the above-mentioned background technology.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The technical solution of the present application provides an anti-locking drill tool for coiled tubing operation, comprising:

[0007] The drilling tool body comprises a driving shaft, a first flexible universal shaft and a spiral rotor connected in sequence along a first direction, wherein the driving shaft, the first flexible universal shaft and the spiral rotor are collectively sleeved with a first housing, and the integral structure formed by the driving shaft, the first flexible universal shaft and the spiral rotor can rotate in the first housing;

[0008] An anti-lock assembly, comprising an anti-drop connecting rod, a second flexible shaft universal shaft and a first adjusting member connected in sequence along a first direction, wherein the anti-drop connecting rod is connected to the spiral rotor, the anti-drop connecting rod, the second flexible shaft universal shaft and the first adjusting member are collectively sleeved with a second housing, the second housing and the opposite ends of the first housing are sealed and connected, the first adjusting member is rotatably connected to an end away from the anti-drop connecting rod with the second adjusting member, and an adjusting cavity is arranged at the center of the connection between the first adjusting member and the second adjusting member, the second adjusting member is fixed to the second housing, the first adjusting member and the second adjusting member are respectively provided with a first through hole and a second through hole on the outer sides, and when the first adjusting member rotates relative to the second adjusting member, the three structures of the first through hole, the second through hole and the adjusting cavity can form two states of connection or disconnection; and

[0009] The connecting joint is connected to the second adjusting member, and the connecting joint is provided with a flow guiding channel communicating with the adjusting cavity.

[0010] A further technical solution is that the first adjusting member comprises a first annular cylinder sleeved on the end of the second flexible shaft universal shaft, the end of the first annular cylinder away from the second flexible shaft universal shaft is rotatably connected to the second annular cylinder, the inner cavity of the first annular cylinder and the inner cavity of the second annular cylinder are connected to form the adjusting cavity, the second annular cylinder is fixed to the second shell, and the connecting joint is arranged at the end of the second annular cylinder away from the first annular cylinder;

[0011] The end of the first annular cylinder extends into the second annular cylinder, the first through hole is arranged on the first annular cylinder in the second annular cylinder, and the second through hole is located outside the first through hole.

[0012] A further technical solution is that the material of the above-mentioned spiral rotor is carbonized dock material;

[0013] Among them, the above-mentioned first shell includes a main shaft housing, a flexible shaft housing and a metal spiral stator connected in sequence, the above-mentioned main shaft housing is located on the outside of the above-mentioned driving shaft, the above-mentioned flexible shaft housing is located on the outside of the above-mentioned first flexible shaft universal shaft, and the above-mentioned metal spiral stator is located on the outside of the above-mentioned spiral rotor.

[0014] A further technical solution is that a thrust bearing group is arranged between the drive shaft and the spindle housing, as well as a spacer ring and a pressure ring for adjusting the gap between the inner and outer rings of the thrust bearing group.

[0015] A further technical solution is that a radial bearing sleeve is provided between the main shaft housing and the flexible shaft housing, and the radial bearing sleeve and the main shaft housing, and the flexible shaft housing and the radial bearing sleeve are connected by threads;

[0016] Wherein, the above-mentioned flexible shaft housing and the above-mentioned metal spiral stator are connected by means of threads.

[0017] A further technical solution is that the metal spiral stator of the second shell and the metal spiral stator of the first shell are connected by threads.

[0018] A further technical solution is that the second adjusting member and the second housing are detachably connected via threads.

[0019] A further technical solution is that the drive shaft and the first flexible axis universal shaft, the first flexible axis universal shaft and the spiral rotor, the spiral rotor and the anti-drop connecting rod, and the second flexible axis universal shaft and the first adjusting member are all detachably connected by threads.

[0020] Compared with the prior art, the technical solution of the utility model has at least the following advantages or beneficial effects:

[0021] In the present application, the well repair fluid flows in from the flow guide channel of the connecting joint, and flows through the regulating chamber, the first through hole, the second through hole, the second shell and the first shell in sequence. The motor assembly formed by the spiral rotor and the metal spiral stator can convert the hydraulic energy of the liquid into mechanical energy, thereby driving the drive shaft to rotate and generate drilling power. In the above process, due to the rotation of the first adjusting member relative to the second adjusting member, the first through hole and the second through hole form a dislocated flow channel, and generate periodic hydraulic changes (the fluid supply of the motor assembly changes periodically); the rotor generates an axial pulling force under the periodic hydraulic changes, thereby driving the anti-drop connecting rod and the second flexure shaft universal shaft to vibrate, which can reduce the friction between the continuous oil pipe and the well wall, thereby preventing the continuous oil pipe from being locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is an axonometric diagram of an anti-locking drill tool for coiled tubing operation according to an embodiment of the present invention;

[0024] Figure 2 A cross-sectional view of an anti-locking drill tool for coiled tubing operation according to an embodiment of the present invention;

[0025] Figure 3 A partial schematic diagram of the drilling tool body according to an embodiment of the present invention Figure 1 ;

[0026] Figure 4 A partial schematic diagram of the drilling tool body according to an embodiment of the present invention Figure 2 ;

[0027] Figure 5 It is a partial schematic diagram of the connection between the drilling tool body and the anti-locking assembly according to an embodiment of the present invention;

[0028] Figure 6 for Figure 3 A partial enlarged view of middle A;

[0029] Figure 7 This is a diagram showing the matching structure of the first adjusting member and the second adjusting member in an embodiment of the present invention;

[0030] Figure 8 for Figure 7 Exploded diagram.

[0031] Icons: 1-drive shaft, 2-first flexible shaft universal joint, 3-spiral rotor, 4-first housing, 401-spindle housing, 402-radial bearing sleeve, 403-flexible shaft housing, 404-metal spiral stator, 5-spacer ring, 6-anti-drop connecting rod, 7-anti-drop nut, 8-second housing, 9-second flexible shaft universal joint, 10-first adjusting member, 11-second adjusting member, 12-adjusting chamber, 13-connecting joint, 14-flow guide channel, 15-first through hole, 16-second through hole, 17-pressure ring. DETAILED DESCRIPTION

[0032] Example

[0033] Please refer to Figure 1-Figure 8, an anti-locking drill tool for continuous tubing operation, including a drill tool body, including a drive shaft 1, a first flexible shaft universal shaft 2 and a spiral rotor 3 connected in sequence along a first direction, the drive shaft 1, the first flexible shaft universal shaft 2 and the spiral rotor 3 are jointly sleeved with a first shell 4, and the integral structure formed by the drive shaft 1, the first flexible shaft universal shaft 2 and the spiral rotor 3 can rotate in the first shell 4; an anti-locking assembly, including an anti-drop connecting rod 6, a second flexible shaft universal shaft 9 and a first adjusting member 10 connected in sequence along the first direction, and the anti-drop connecting rod 6 is connected to the spiral rotor 3, the anti-drop connecting rod 6, the second flexible shaft universal shaft 9 and the first adjusting member 10 are jointly sleeved with a second shell 8, and the second shell 8 and the opposite ends of the first shell 4 are sealed and connected Then, the first adjusting member 10 is rotatably connected to the second adjusting member 11 at one end away from the anti-drop connecting rod 6, and an adjusting cavity 12 is arranged at the center of the connection between the first adjusting member 10 and the second adjusting member 11, the second adjusting member 11 is fixed to the second shell 8, and the outer sides of the first adjusting member 10 and the second adjusting member 11 are respectively provided with a first through hole 15 and a second through hole 16, when the first adjusting member 10 rotates relative to the second adjusting member 11, the three structures of the first through hole 15, the second through hole 16 and the adjusting cavity 12 can form two states of connection or disconnection; and a connecting joint 13, which is connected to the second adjusting member 11, and the connecting joint 13 is provided with a guide channel 14 connected to the adjusting cavity 12.

[0034] In the present application, the well repair fluid flows into the guide channel 14 of the connecting joint 13, and flows through the regulating chamber 12, the first through hole 15, the second through hole 16, the second shell 8 and the first shell 4 in sequence. The motor assembly formed by the spiral rotor 3 and the metal spiral stator 404 can convert the hydraulic energy of the liquid into mechanical energy, thereby driving the drive shaft 1 to rotate and generate drilling power. In the above process, since the first adjusting member 10 rotates relative to the second adjusting member 11, the first through hole 15 and the second through hole 16 form a dislocated flow channel, and generate periodic hydraulic changes (the liquid supply of the motor assembly changes periodically); the rotor generates an axial pulling force under the periodic hydraulic changes, thereby driving the anti-drop connecting rod 6 and the second flexure shaft universal shaft 9 to vibrate, which can reduce the friction between the continuous oil pipe and the well wall, thereby preventing the continuous oil pipe from being locked.

[0035] The application has good field applicability. The structure has no special requirements on the solid content, pumping pressure and flow rate of the well repair fluid, and only needs to meet the use requirements of the screw drilling tool motor.

[0036] In some embodiments of the present utility model, the first adjusting member 10 comprises a first annular cylinder sleeved on the end of the second flexible shaft universal shaft 9, the end of the first annular cylinder away from the second flexible shaft universal shaft 9 is rotatably connected to the second annular cylinder, the inner cavity of the first annular cylinder and the inner cavity of the second annular cylinder are connected to form the adjusting cavity 12, the second annular cylinder is fixed to the second housing 8, and the connecting joint 13 is arranged at the end of the second annular cylinder away from the first annular cylinder;

[0037] The end of the first annular cylinder extends into the second annular cylinder, the first through hole 15 is provided on the first annular cylinder in the second annular cylinder, and the second through hole 16 is located outside the first through hole 15 .

[0038] In the above embodiment, after the first annular cylinder and the second flexible universal shaft 9 are connected, the second flexible universal shaft 9 forms a seal on the port of the first annular cylinder to prevent the fluid in the first annular cylinder from flowing out from the port (the connection end with the second flexible universal shaft 9). The connecting joint 13 is connected to the end of the second annular cylinder, the connecting joint 13 extends into the interior of the second annular cylinder, and the connecting joint 13 seals the port of the second annular cylinder. After the well repair fluid flows into the regulating chamber 12 from the diversion channel 14, the liquid in the regulating chamber 12 can only flow out from the first through hole 15 and the second through hole 16.

[0039] Furthermore, the number of the first through holes 15 on the first annular cylinder and the number of the second through holes 16 on the second annular cylinder are both multiple and equal, the multiple first through holes 15 are evenly spaced along the circumferential direction of the first annular cylinder, and the multiple second through holes 16 are evenly spaced along the circumferential direction of the second annular cylinder.

[0040] In some embodiments of the present invention, the material of the spiral rotor 3 is carbonized dock material;

[0041] Among them, the above-mentioned first shell 4 includes a main shaft housing 401, a flexible shaft housing 403 and a metal spiral stator 404 connected in sequence, the above-mentioned main shaft housing 401 is located on the outside of the above-mentioned driving shaft 1, the above-mentioned flexible shaft housing 403 is located on the outside of the above-mentioned first flexible shaft universal shaft 2, and the above-mentioned metal spiral stator 404 is located on the outside of the above-mentioned spiral rotor 3.

[0042] In the above embodiment, the motor assembly formed by the spiral rotor 3 and the metal spiral stator 404 can convert the hydraulic energy of the liquid into mechanical energy, thereby driving the drive shaft 1 to rotate and generate drilling power. At the same time, the rotor and the metal spiral stator 404 made of carbide dock material have the advantage of high temperature resistance, and do not need to be re-cleaned and injected during maintenance, which is more practical.

[0043] After the application of this application, the power output is improved, the work efficiency is improved, and good economic benefits are shown; compared with the previous rubber motor, this structure is an all-metal motor. Under the same length, the pressure resistance of each stage is increased by 2-3 times, and the output power is increased by 2-3 times.

[0044] In some embodiments of the present invention, a thrust bearing assembly is provided between the drive shaft 1 and the spindle housing 401 , as well as a spacer ring 5 and a pressure ring 17 for adjusting the gap between the inner and outer rings of the thrust bearing assembly.

[0045] In the above embodiment, the design of the thrust bearing group can realize the rotation connection between the drive shaft 1 and the spindle housing 401, avoiding the problem of large friction between the drive shaft 1 and the spindle housing 401. The pressure ring 17 is sleeved on the drive shaft 1, and the spacer ring 5 is sleeved on the pressure ring 17; the matching design of the spacer ring 5 and the pressure ring 17 can adjust the inner and outer ring clearance of the above thrust bearing group.

[0046] In some embodiments of the present invention, a radial bearing sleeve 402 is disposed between the spindle housing 401 and the flexible shaft housing 403, and the radial bearing sleeve 402 and the spindle housing 401, and the flexible shaft housing 403 and the radial bearing sleeve 402 are both connected by threads;

[0047] The above-mentioned flexible shaft housing 403 and the above-mentioned metal spiral stator 404 are connected by threads.

[0048] In the above embodiment, based on the above threaded connection method (the radial bearing sleeve 402 and the above main shaft housing 401, the above flexible shaft housing 403 and the above radial bearing sleeve 402 are all connected by threaded means, and the above flexible shaft housing 403 and the above stator are connected by threaded means), the first shell 4 can be disassembled into multiple separate parts to facilitate the transportation of the first shell 4.

[0049] In some embodiments of the present invention, the second housing 8 and the metal spiral stator 404 of the first housing 4 are connected by threads.

[0050] In the above embodiment, the second housing 8 and the metal spiral stator 404 of the above first housing 4 are connected by threads, which can realize the quick connection or disassembly of the first housing 4 and the second housing 8, and has the advantage of easy installation or maintenance.

[0051] In some embodiments of the present invention, the second adjusting member 11 and the second housing 8 are detachably connected via threads.

[0052] In the above embodiment, the second adjusting member 11 and the above-mentioned second shell 8 are detachably connected by threads, which facilitates the connection or disassembly of the whole consisting of the anti-drop connecting rod 6, the second flexible axis universal shaft 9, the first adjusting member 10 and the second connecting rod with the second shell 8.

[0053] In some embodiments of the utility model, the drive shaft 1 and the first flexible axis universal shaft 2, the first flexible axis universal shaft 2 and the spiral rotor 3, the spiral rotor 3 and the anti-drop connecting rod 6, and the second flexible axis universal shaft 9 and the first adjusting member 10 are all detachably connected via threads.

[0054] In the above embodiments, the present application can be disassembled into multiple separate units, which is convenient for overall assembly or disassembly, and has the advantage of easy transportation or maintenance.

[0055] Furthermore, an anti-drop nut 7 is provided at one end of the second shell 8 facing the metal spiral stator 404 , and the anti-drop nut 7 extends into the metal spiral stator 404 and is threadedly matched with the metal spiral stator 404 to improve the stability of the connection between the second shell 8 and the metal spiral stator 404 .

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-locking drill tool for coiled tubing operation, characterized in that: include: The drilling tool body comprises a driving shaft (1), a first flexible universal shaft (2) and a spiral rotor (3) which are connected in sequence along a first direction; the driving shaft (1), the first flexible universal shaft (2) and the spiral rotor (3) are collectively sleeved with a first housing (4); and the integral structure formed by the driving shaft (1), the first flexible universal shaft (2) and the spiral rotor (3) is capable of rotating in the first housing (4); The anti-locking assembly comprises an anti-drop connecting rod (6), a second flexible shaft universal shaft (9) and a first adjusting member (10) which are connected in sequence along a first direction, wherein the anti-drop connecting rod (6) is connected to the spiral rotor (3), the anti-drop connecting rod (6), the second flexible shaft universal shaft (9) and the first adjusting member (10) are jointly sleeved with a second outer shell (8), the second outer shell (8) and the first outer shell (4) are sealed at opposite ends thereof, the first adjusting member (10) is rotatably connected to an end thereof which is away from the anti-drop connecting rod (6), and the second adjusting member (11) is rotatably connected to the end thereof which is away from the anti-drop connecting rod (6), and the first adjusting member (10) is An adjusting cavity (12) is provided at the center of the connection between the first adjusting member (10) and the second adjusting member (11); the second adjusting member (11) is fixed to the second housing (8); a first through hole (15) and a second through hole (16) are provided on the outer sides of the first adjusting member (10) and the second adjusting member (11); when the first adjusting member (10) rotates relative to the second adjusting member (11), the first through hole (15), the second through hole (16) and the adjusting cavity (12) can form two states of connection or disconnection; as well as A connecting joint (13) is connected to the second adjusting member (11), and the connecting joint (13) is provided with a guide channel (14) communicating with the adjusting chamber (12).

2. The anti-locking drill tool for coiled tubing operation according to claim 1, characterized in that: The first adjusting member (10) comprises a first annular cylinder sleeved on the end of the second flexible universal shaft (9); the end of the first annular cylinder away from the second flexible universal shaft (9) is rotatably connected to the second annular cylinder; the inner cavity of the first annular cylinder and the inner cavity of the second annular cylinder are connected to form the adjusting cavity (12); the second annular cylinder is fixed to the second outer shell (8); and the connecting joint (13) is arranged at the end of the second annular cylinder away from the first annular cylinder; The end of the first annular cylinder extends into the second annular cylinder, the first through hole (15) is arranged on the first annular cylinder inside the second annular cylinder, and the second through hole (16) is located outside the first through hole (15).

3. The anti-locking drill tool for coiled tubing operation according to claim 1, characterized in that: The material of the spiral rotor (3) is carbonized dock material; The first housing (4) comprises a main shaft housing (401), a flexible shaft housing (403) and a metal spiral stator (404) which are connected in sequence, wherein the main shaft housing (401) is located on the outside of the drive shaft (1), the flexible shaft housing (403) is located on the outside of the first flexible shaft universal shaft (2), and the metal spiral stator (404) is located on the outside of the spiral rotor (3).

4. The anti-locking drill tool for coiled tubing operation according to claim 3, characterized in that: A thrust bearing group is arranged between the drive shaft (1) and the main shaft housing (401), as well as a spacer ring (5) and a pressure ring (17) for adjusting the gap between the inner and outer rings of the thrust bearing group.

5. The anti-locking drill tool for coiled tubing operation according to claim 4, characterized in that: A radial bearing sleeve (402) is provided between the main shaft housing (401) and the flexible shaft housing (403); the radial bearing sleeve (402) and the main shaft housing (401), and the flexible shaft housing (403) and the radial bearing sleeve (402) are both connected via threads; Wherein, the flexible shaft housing (403) and the metal spiral stator (404) are connected by means of threads.

6. The anti-locking drill tool for coiled tubing operation according to claim 5, characterized in that: The second housing (8) and the metal spiral stator (404) are connected by threads.

7. The anti-locking drill tool for coiled tubing operation according to claim 6, characterized in that: The second adjusting member (11) and the second housing (8) are detachably connected via threads.

8. The anti-locking drill tool for coiled tubing operation according to claim 7, characterized in that: The drive shaft (1) and the first flexible shaft universal shaft (2), the first flexible shaft universal shaft (2) and the spiral rotor (3), the spiral rotor (3) and the anti-drop connecting rod (6), and the second flexible shaft universal shaft (9) and the first adjusting member (10) are all detachably connected via threads.

Images