Flexible cable laying pipe anchor

Abstract

The utility model discloses a flexible cable laying pipe anchor which comprises a central pipe, an upper connector is fixedly installed at one end of the central pipe, a lower connector is connected to the other end of the central pipe in a sleeved mode, and a hydraulic cylinder body abutting against one end of the upper connector is arranged outside the central pipe in a sleeved mode. A ratchet piston located in the hydraulic cylinder body is slidably arranged outside the central pipe in a sleeving mode, an upper cone is slidably arranged in the middle of the outer portion of the central pipe in a sleeving mode, a shearing sleeve located on one side of the hydraulic cylinder body is arranged at one end of the ratchet piston, and the end, facing the upper connector, of the upper cone abuts against and makes contact with the end, away from the upper connector, of the shearing sleeve. A hydraulic setting anchoring mode and a hydraulic anchoring releasing mode are adopted, due to the fact that the rigidity of a cable laying pipe is poor, the anchoring mode cannot be achieved through a conventional mode that a pipe column is lifted or lowered through a machine, anchoring and anchoring releasing of an anchor can be effectively achieved through the hydraulic mode, and no damage is caused to the cable laying pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil exploitation, specifically is a flexible cable laying pipe anchor. BACKGROUND

[0002] At present, in the oil exploitation operation, the oil pipe used by the traditional oil pumping is metal oil pipe, and the oil pipes are mostly threadedly connected and sealed between the oil pipes, and there are problems such as that the metal oil pipe is easy to corrode, the wellbore is easy to be frozen, the oil pipe is easy to be scaled, the oil pipe thread connection is easy to leak, the downhole temperature and dynamic liquid level data lack real-time monitoring function and the like in actual exploitation operation, and the oil field adopts the non-metal flexible cable laying pipe to replace the metal oil pipe for improving the above problems, the cable laying pipe is inlaid with cables, heating wires and optical fiber signal transmission lines inside, and the above problems existing in the metal oil pipe can be avoided, but the flexible cable laying pipe is poor in rigidity, and there are problems such as pipe string peristalsis and rotation in actual operation, and under the action of tension, the flexible cable laying pipe can be broken or eccentric wear, after the operation is finished, the residual oil liquid inside the oil pipe cannot be released, so that the pipe string weight borne by the cable laying pipe in the process of well tripping is increased, the cable laying pipe is broken, and operation accidents are caused.

[0003] Therefore, we propose a flexible cable laying pipe anchor. CONTENT OF THE UTILITY MODEL

[0004] The utility model is aimed at providing a flexible cable laying pipe anchor to solve the problems in the above background technology.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a flexible cable pipe anchor, including the central pipe, one end of the central pipe is fixedly installed with upper joint, the other end of the central pipe is sleeved with lower joint, the outside of the central pipe is sleeved with the liquid cylinder body of upper joint one end abutting, the outside of the central pipe is slidably sleeved with the ratchet piston in the liquid cylinder body, the middle part of the outside of the central pipe is slidably sleeved with upper cone, one end of the ratchet piston is provided with the shearing sleeve on one side of the liquid cylinder body, the one end of upper cone towards upper joint abutting contact with the one end of shearing sleeve away from upper joint, the outside of the central pipe is fixedly sleeved with the slip sleeve of wrapping in the one end of upper cone away from upper joint, the inside of the slip sleeve is sleeved with the slip of wrapping in the outside of the central pipe, the inside of the other end of slip sleeve is sleeved with the lower cone of wrapping in the outside of the central pipe, the outside of the central pipe is slidably sleeved with the outer tube on one side of lower joint, the one end of outer tube towards upper joint is fixedly sleeved with the other end of lower cone, the middle part of the inside of outer tube is fixedly installed with the shearing piston of sleeving in the outside of the central pipe, the outer circumferential surface of the central pipe is provided with the shearing pin in the inside of outer tube, the top of shearing pin is inserted with shearing piston, the outer circumferential surface of the central pipe is fixedly installed with the unsealing pin in the inside of liquid cylinder body, the top of unsealing pin is inserted with the inner wall of ratchet piston on one end of upper joint, the one end of slip sleeve outside circumferential surface is close to shearing sleeve and is provided with another group of unsealing pins, and the other end of another group of unsealing pins is fixedly installed with the outer circumferential surface of upper cone.

[0006] Optionally, the outside of the ratchet piston is sleeved with the lock ring seat on one side of the liquid cylinder body, one end of the lock ring seat is in abutting contact with one side of the liquid cylinder body, the other end of the lock ring seat is in abutting contact with the shearing sleeve, the other end of the lock ring seat is sleeved with the one end of the shearing sleeve towards the upper joint, and the outer circumferential surface of the ratchet piston is fixedly sleeved with the lock ring.

[0007] Optionally, one side of the lock ring is provided with a fixed check ring, the other side of the fixed check ring is provided with an elastic check ring in abutting contact with the fixed check ring, and the fixed check ring and the elastic check ring are arranged between the lock ring and the shearing sleeve.

[0008] Optionally, the outer circumferential surface of the ratchet piston is provided with evenly distributed ratchets, the inclined surface of the upper cone is oppositely arranged with the inclined surface of the slip towards the upper joint, the inclined surface of the lower cone is oppositely arranged with the inclined surface of the slip away from the upper joint, and the inner ring surface of the lock ring is provided with ratchets corresponding to the ratchet piston.

[0009] Optionally, the middle part of the outer circumferential surface of the slip is provided with a groove, the bottom of the groove provided on the slip is provided with a spring, the top of the spring is in abutting contact with the middle part inside the slip sleeve, the middle part of the slip sleeve is provided with symmetrically arranged through holes, and the one end of the slip sleeve close to the lower joint is provided with the slip sleeve check ring wrapped outside the lower cone.

[0010] Optionally, the outer circumferential surface of the center tube is provided with bypass holes for communicating the inside of the center tube with the inside of the liquid cylinder body, and the outer circumferential surface of the center tube is provided with another group of bypass holes for communicating the inside of the center tube with the inside of the outer cylinder.

[0011] Optionally, the bypass holes for communicating the liquid cylinder body are arranged on one side of the ratchet piston, the bypass holes for communicating the outer cylinder are arranged on one side of the shear piston, and the outer cylinder is provided with another group of bypass holes above the shear piston.

[0012] Optionally, the outer circumferential surface of the upper joint and the lower joint is integrally connected with a flange sheet, the middle part of the flange sheet of the upper joint and the lower joint is provided with a mounting hole for mounting cables and optical fibers, and the outer circumferential surface of the liquid cylinder body, the lock ring seat, the shear sleeve and the slip sleeve is provided with corresponding cable and optical fiber mounting grooves.

[0013] Optionally, the outer circumferential surface of the lower joint is fixedly sleeved with a ball seat joint, the inside of the ball seat joint is provided with a pressing cap, one side of the pressing cap is provided with a spacer, and one side of the spacer is provided with a steel ball.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The flexible cable-laying pipe anchor can avoid the disadvantage that the cable-laying pipe cannot be processed with threads, thereby ensuring the reliability and sealing performance of the pipe string connection.

[0016] The flexible cable-laying pipe anchor adopts hydraulic seat sealing anchoring and hydraulic anchoring releasing, and the cable-laying pipe has poor rigidity, so the conventional mechanical pipe string lifting or lowering cannot be used for anchoring, and the hydraulic anchoring can effectively realize anchoring and anchoring releasing, and does not cause any damage to the cable-laying pipe.

[0017] The flexible cable-laying pipe anchor is provided with the slip of the anchor, and has bidirectional anchoring function, so that the tension and contraction force borne by the cable-laying pipe due to the pipe string creeping and rotating can be solved, and the service life is ensured.

[0018] The flexible cable-laying pipe anchor is provided with cable, heating wire and optical fiber signal transmission line mounting grooves on the outer circle of the anchor, and the mounting grooves are fixed in the mounting grooves through the fixing ring, so that the cable, the heating wire and the optical fiber signal transmission line are effectively prevented from scattering in the annulus, and the service life is prolonged, and the long-term reliability of data acquisition and various operations is ensured.

[0019] The flexible cable-laying pipe anchor is provided with a ball seat sealing structure, the ball seat sealing structure is provided with a pressing cap for preventing the steel ball from being washed out of the pipe string by well fluid, the pressing cap is provided with an axial flow guide hole, and the flow area of the oil liquid passing through the pipe string during the oil pumping process is ensured.

[0020] The flexible cable-laid pipe anchor prevents early anchoring due to hydrostatic pressure, avoids the risk of early anchoring during pipe column lowering into the well, and improves the success rate of operation process.

[0021] The flexible cable-laid pipe anchor is provided with a bypass structure, and the bypass hole is automatically opened when the pipe column is lifted after the anchor is released by hydraulic pressure, residual oil in the pipe column can be discharged during well lifting, the weight borne by the pipe column is reduced, and the cable-laid pipe is prevented from being broken due to high tension caused by increased weight, thereby avoiding operation accidents. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is a whole structure schematic view of the flexible cable-laid pipe anchor.

[0023] Fig. 2 It is a sectional structure schematic view of the flexible cable-laid pipe anchor.

[0024] In the figure, 1 is an upper joint, 2 is a central pipe, 3 is a liquid cylinder body, 4 is a ratchet piston, 5 is a lock ring seat, 6 is a lock ring, 7 is a fixed check ring, 8 is an elastic check ring, 9 is a shearing sleeve, 10 is an upper cone, 11 is a slip sleeve, 12 is a slip, 13 is a lower cone, 14 is a slip sleeve check ring, 15 is an outer cylinder, 16 is a shearing piston, 17 is a lower joint, 18 is a ball seat joint, 19 is a pressing cap, 20 is a spacer sleeve, 21 is a spring, 22 is a steel ball, 23 is an unsealing pin, 24 is a shearing pin, 25 is a bypass hole, 26 is a mounting groove, and 27 is a mounting hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] Please refer to Figs. 1-2The utility model provides a kind of flexible cable laying pipe anchor, including center tube 2, one end of center tube 2 is fixedly installed with upper joint 1, the other end of center tube 2 is sleeved with lower joint 17, the outside of center tube 2 is sleeved with the liquid cylinder body 3 that upper joint 1 one end abuts, the outside of center tube 2 is slidably sleeved with the ratchet piston 4 located in the inside of liquid cylinder body 3, the middle part of the outside of center tube 2 is slidably sleeved with upper cone 10, one end of ratchet piston 4 is provided with the shearing sleeve 9 located in one side of liquid cylinder body 3, the one end of upper cone 10 towards upper joint 1 is in abutting contact with the one end of shearing sleeve 9 away from upper joint 1, the outside of center tube 2 is fixedly sleeved with the slip sleeve 11 wrapped in the one end of upper cone 10 away from upper joint 1, the inside of slip sleeve 11 is sleeved with the slip 12 wrapped in the outside of center tube 2, the inside of the other end of slip sleeve 11 is sleeved with the lower cone 13 wrapped in the outside of center tube 2, the outside of center tube 2 is slidably sleeved with the outer tube 15 located in one side of lower joint 17, the one end of outer tube 15 towards upper joint 1 is fixedly sleeved with the other end of lower cone 13, the middle part in the inside of outer tube 15 is fixedly installed with the shearing piston 16 sleeved in the outside of center tube 2, the outer circumferential surface of center tube 2 is provided with the shearing pin 24 located in the inside of outer tube 15, the top of shearing pin 24 is inserted with shearing piston 16, the outer circumferential surface of center tube 2 is fixedly installed with the unsealing pin 23 located in the inside of liquid cylinder body 3, the top of unsealing pin 23 is inserted with the inner wall of ratchet piston 4 close to one end of upper joint 1, one end of the outer circumferential surface of slip sleeve 11 close to shearing sleeve 9 is provided with another group of unsealing pin 23, the other end of another group of unsealing pin 23 is fixedly installed with the outer circumferential surface of upper cone 10, by anchor design has the unsealing pin 23 that prevents due to static liquid column pressure and makes it anchor in advance, avoid the risk of pipe string early anchoring in the process of going downhole, improve the success rate of operation process, by adopting hydraulic seat seal anchoring and hydraulic unanchoring mode, because the rigidity of cable laying pipe is poor, the conventional mechanical lifting or lowering pipe string to anchor mode cannot be realized, and the hydraulic mode can effectively realize the anchoring and unanchoring of the anchor, without causing any damage to the cable laying pipe.

[0027] The outside of ratchet piston 4 is sleeved with the lock ring seat 5 located in one side of liquid cylinder body 3, one end of lock ring seat 5 is in abutting contact with one side of liquid cylinder body 3, the other end of lock ring seat 5 is in abutting contact with shearing sleeve 9, the other end of lock ring seat 5 is sleeved with the one end of shearing sleeve 9 towards upper joint 1, the outer circumferential surface of ratchet piston 4 is fixedly sleeved with lock ring 6.

[0028] One side of lock ring 6 is provided with fixed check ring 7, the other side of fixed check ring 7 is provided with elastic check ring 8 in abutting contact with fixed check ring 7, fixed check ring 7 and elastic check ring 8 are arranged between lock ring 6 and shearing sleeve 9.

[0029] The outer circumferential surface of the ratchet piston 4 is provided with uniformly distributed ratchets, the inclined surface of the upper cone 10 is oppositely arranged to the inclined surface of the slip 12 towards the upper joint 1, the inclined surface of the lower cone 13 is oppositely arranged to the inclined surface of the slip 12 away from the upper joint 1, and the inner annular surface of the lock ring 6 is provided with ratchets corresponding to the ratchet piston 4.

[0030] The middle part of the outer circumferential surface of the slip 12 is provided with a groove, the bottom of the groove arranged on the slip 12 is provided with a spring 21, the top of the spring 21 is in close contact with the middle part of the inner part of the slip sleeve 11, the middle part of the slip sleeve 11 is provided with symmetrically arranged through holes, and the end of the slip sleeve 11 close to the lower joint 17 is provided with a slip sleeve 11 stop ring wrapped outside the lower cone 13. The slip 12 has a bidirectional anchoring function through the anchor, which can simultaneously solve the tension and contraction force borne by the cable pipe due to the creep and rotation of the pipe string, thereby ensuring the service life.

[0031] The outer circumferential surface of the central pipe 2 is provided with bypass holes 25 communicating the inside of the central pipe 2 with the inside of the liquid cylinder body 3, and the outer circumferential surface of the central pipe 2 is provided with another group of bypass holes 25 communicating the inside of the central pipe 2 with the inside of the outer cylinder 15.

[0032] The bypass hole 25 communicating the liquid cylinder body 3 is arranged on one side of the ratchet piston 4, the bypass hole 25 communicating the outer cylinder 15 is arranged on one side of the shear piston 16, and the outer cylinder 15 is provided with another group of bypass holes 25 located above the shear piston 16. The bypass structure is designed through the anchor, and when the pipe string is lifted after the hydraulic pressure is released, the bypass hole 25 is automatically opened, the residual oil in the pipe string can be released during well lifting, the weight borne by the pipe string is reduced, thereby avoiding the rupture of the cable pipe due to the high tension borne by the increased weight, which causes operation accidents.

[0033] The outer circumferential surface of the upper joint 1 and the lower joint 17 is integrally connected with a flange sheet, the flange connection is adopted at both ends of the anchor, which can avoid the disadvantage that the cable pipe cannot be machined with threads, thereby ensuring the reliability and sealing performance of the pipe string connection. The middle part of the flange sheet arranged on the upper joint 1 and the lower joint 17 is provided with a mounting hole 27 for installing cables and optical fibers, and the outer circumferential surface of the liquid cylinder body 3, the lock ring seat 5, the shear sleeve 9 and the slip sleeve 11 is provided with corresponding cable and optical fiber installation grooves 26. The cable, heating wire and optical fiber signal transmission line installation grooves 26 are designed on the outer circle of the anchor, and are fixed in the installation grooves 26 through the fixing ring, which effectively avoids the scattering of the cable, heating wire and optical fiber signal transmission line in the annulus, the erosion and damage of well fluid and downhole impurities, prolongs the service life, and ensures the long-term reliability of data acquisition and various operations.

[0034] The outer circumferential surface of the lower joint 17 is fixedly sleeved with a ball seat joint 18, the inside of the ball seat joint 18 is provided with a pressure cap 19, one side of the pressure cap 19 is provided with a spacer sleeve 20, one side of the spacer sleeve 20 is provided with a steel ball 22, a ball seat sealing structure is designed through an anchor, the ball seat sealing structure is designed with the pressure cap 19 for preventing the steel ball 22 from being washed out of the pipe column by well fluid, the pressure cap 19 is designed with an axial flow guide hole, and the flow area for ensuring the oil liquid in the pipe column to pass through during the oil pumping process is ensured.

[0035] Working principle:

[0036] After the pipe column reaches a predetermined position, the pipe column is positively pressurized, the ratchet piston 4 is lowered to shear the seat seal pin, the ratchet piston 4 pushes the shear sleeve 9 and the upper cone 10 to descend, since the lower vertebra is fixed by the unsealing pin 23, the upper cone 10 descending will spread the slips 12 anchored on the inner wall of the casing, the outer circle of the ratchet piston 4 is designed with a sawtooth structure, the inner hole of the lock ring 6 is also designed with a sawtooth structure, when the ratchet piston 4 spreads the slips 12, the lock ring 6 locks the ratchet piston 4 through the sawtooth, so that the ratchet piston 4 cannot ascend, the anchor is anchored, and oil pumping operation can be performed;

[0037] When the operation is completed, the pipe column needs to be lifted, the pipe column is continuously positively pressurized, the shear piston 16 is pushed downward by the pressure to shear the unsealing pin 23, at this time, the central pipe 2 can ascend, the central pipe 2 of the pipe column is pulled upward, the outer cylinder 15 string and the upper cone 10 are pulled upward, the slips 12 are retracted under the action of the spring 21, the anchor is released, at this time, the bypass hole 25 is opened, the oil liquid remaining in the pipe column during the pipe column lifting process flows into the annulus through the bypass hole 25, the weight of the pipe column is reduced, and the pipe column is more convenient to lift the well.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible cable-laying pipe anchor comprising a central pipe (2), characterized in that One end of the center pipe (2) is fixedly installed with an upper joint (1), the other end of the center pipe (2) is sleeved with a lower joint (17), the outside of the center pipe (2) is sleeved with a liquid cylinder body (3) which is abutted by one end of the upper joint (1), the outside of the center pipe (2) is slidingly sleeved with a ratchet piston (4) which is located inside the liquid cylinder body (3), the middle of the outside of the center pipe (2) is slidingly sleeved with an upper cone (10), one end of the ratchet piston (4) is provided with a shearing sleeve (9) which is located on one side of the liquid cylinder body (3), one end of the upper cone (10) which is away from the upper joint (1) is in abutting contact with one end of the shearing sleeve (9) which is away from the upper joint (1), the outside of the center pipe (2) is fixedly sleeved with a slip sleeve (11) which wraps one end of the upper cone (10) which is away from the upper joint (1), the inside of the slip sleeve (11) is sleeved with a slip (12) which wraps the outside of the center pipe (2), the inside of the other end of the slip sleeve (11) is sleeved with a lower cone (13) which wraps the outside of the center pipe (2), the outside of the center pipe (2) is slidingly sleeved with an outer cylinder (15) which is located on one side of the lower joint (17), one end of the outer cylinder (15) which is away from the upper joint (1) is fixedly sleeved with the other end of the lower cone (13), the middle of the inside of the outer cylinder (15) is fixedly installed with a shearing piston (16) which is sleeved on the outside of the center pipe (2), the outer circumferential surface of the center pipe (2) is provided with a shearing pin (24) which is located inside the outer cylinder (15), the top of the shearing pin (24) is inserted into the shearing piston (16), the outer circumferential surface of the center pipe (2) is fixedly installed with an unblocking pin (23) which is located inside the liquid cylinder body (3), the top of the unblocking pin (23) is inserted into the inner wall of one end of the ratchet piston (4) which is close to the upper joint (1), one end of the slip sleeve (11) which is close to the shearing sleeve (9) is penetratingly provided with another set of unblocking pins (23), the other end of the other set of unblocking pins (23) is fixedly installed on the outer circumferential surface of the upper cone (10).

2. A flexible cable-laying tube anchor according to claim 1, wherein, The outside of the ratchet piston (4) is sleeved with a lock ring seat (5) which is located on one side of the liquid cylinder body (3), one end of the lock ring seat (5) is in abutting contact with one side of the liquid cylinder body (3), the other end of the lock ring seat (5) is in abutting contact with the shearing sleeve (9), the other end of the lock ring seat (5) is sleeved with one end of the shearing sleeve (9) which is away from the upper joint (1), the outer circumferential surface of the ratchet piston (4) is fixedly sleeved with a lock ring (6).

3. A flexible cable-laying conduit anchor according to claim 2, wherein, One side of the lock ring (6) is provided with a fixed check ring (7), the other side of the fixed check ring (7) is provided with an elastic check ring (8) which is in abutting contact with the fixed check ring (7), the fixed check ring (7) and the elastic check ring (8) are arranged between the lock ring (6) and the shearing sleeve (9).

4. A flexible cable-laying conduit anchor according to claim 3, wherein, The outer circumferential surface of the ratchet piston (4) is provided with uniformly distributed ratchets, the inclined surface of the upper cone (10) is oppositely arranged with the inclined surface of the slip (12) towards the upper joint (1), the inclined surface of the lower cone (13) is oppositely arranged with the inclined surface of the slip (12) away from the upper joint (1), and the inner ring surface of the lock ring (6) is provided with ratchets corresponding to the ratchet piston (4).

5. A flexible cable conduit anchor according to claim 1, wherein, The middle part of the outer circumferential surface of the slip (12) is provided with a groove, the bottom of the groove of the slip (12) is provided with a spring (21), the top of the spring (21) is in abutting contact with the middle part of the inner part of the slip sleeve (11), the middle part of the slip sleeve (11) is provided with symmetrically arranged through holes, and the end of the slip sleeve (11) close to the lower joint (17) is provided with a slip sleeve (11) blocking ring wrapped outside the lower cone (13).

6. A flexible cable conduit anchor according to claim 1, wherein, The outer circumferential surface of the center pipe (2) is provided with bypass holes (25) communicating the inside of the center pipe (2) with the inside of the liquid cylinder body (3), and the outer circumferential surface of the center pipe (2) is provided with another group of bypass holes (25) communicating the inside of the center pipe (2) with the inside of the outer cylinder (15).

7. A flexible cable-laying conduit anchor according to claim 6, wherein, The bypass hole (25) communicating the liquid cylinder body (3) is arranged on one side of the ratchet piston (4), the bypass hole (25) communicating the outer cylinder (15) is arranged on one side of the shear piston (16), and the outer cylinder (15) is provided with another group of bypass holes (25) located above the shear piston (16).

8. A flexible cable conduit anchor according to claim 1, wherein, The outer circumferential surface of the upper joint (1) and the lower joint (17) is integrally connected with a flange piece, the middle part of the flange piece provided on the upper joint (1) and the lower joint (17) is provided with a mounting hole (27) for mounting cables and optical fibers, and the outer circumferential surface of the liquid cylinder body (3), the lock ring seat (5), the shear sleeve (9) and the slip sleeve (11) is provided with corresponding cable and optical fiber mounting grooves (26).

9. A flexible cable conduit according to claim 1, wherein, The outer circumferential surface of the lower joint (17) is fixedly sleeved with a ball seat joint (18), the inside of the ball seat joint (18) is provided with a pressing cap (19), one side of the pressing cap (19) is provided with a spacer sleeve (20), and one side of the spacer sleeve (20) is provided with a steel ball (22).

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