CN116556891A - Long-acting cannula bridge plug capable of fishing and drilling quickly - Google Patents

Abstract

The invention discloses a long-acting cannula bridge plug capable of fishing a fast drill, which comprises an upper joint, wherein an outer sleeve is arranged on the outer surface of the upper joint, an outer piston is arranged on the inner surface of the outer sleeve, an anti-blocking block is arranged on the inner surface of the outer piston, an inner piston is arranged on the inner surface of the outer piston, an inner central tube is arranged on the inner surface of the inner piston, and a split pushing sleeve is arranged on the outer surface of the inner piston. Through the structure, the expansion rubber cylinder is integrally vulcanized by adopting metal rubber without a framework, the obvious rough fluctuation of the inner wall of the sleeve can be automatically compensated and filled by virtue of the sufficient thickness and elasticity of the expansion rubber cylinder, the corrosion and scaling adaptability to the inner wall of the sleeve are stronger, the cone and the slip are in Morse self-locking cone angle contact, the slip is made of a quick-drilling composite material as a carrier, and the quick-drilling composite material is inlaid with cemented carbide teeth, so that the drilling, grinding and milling efficiencies are very high.

Description

Long-acting cannula bridge plug capable of fishing and drilling quickly

Technical Field

The invention relates to the technical field of oil well exploitation devices, in particular to a long-acting cannula bridge plug capable of fishing a fast drill.

Background

The conventional scheme of the oil field at present is that the production string is produced by setting the production string after the production string is provided with a packer for separate production or setting a conventional cannula bridge plug for temporary plugging. Under the condition of severe working conditions of a shaft, the following defects exist: the conventional cannula bridge plug stays in the well for a long time; the slips and the cone scale are adhered to each other, so that the seizing is caused, underground accidents are easy to occur, the conventional cannula bridge plug seizing is carried out, even if a salvaging tool is successfully withdrawn, well fittings are left, and great workload and difficulty are brought to milling and seizing removal; when the drillable bridge plug is used, the bridge plug cannot be fished, and the bridge plug has to be removed by milling, so that the workload is also great; the conventional drillable bridge plug is processed by ductile cast iron materials, the drilling and grinding difficulty is slightly lower than that of conventional alloy steel, the whole well is left, and the difficulty of milling and unlocking in high-inclination wells and horizontal wells is still quite high; for heavy corrosion and scaling on the inner wall of a shaft, the sealing performance of the compression rubber cylinder is poor, the effective period is short, the sheaths at the two ends of the expansion rubber sealing cylinder are metal parts, and once the clamping is encountered, the difficulty of drilling, grinding and clamping is high.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and provides a long-acting cannula bridge plug capable of fishing a quick drill, wherein an expansion rubber cylinder is integrally vulcanized by adopting metal rubber without a framework, the obvious rough fluctuation of the inner wall of a sleeve can be automatically compensated and filled by virtue of the sufficient thickness and elasticity of the expansion rubber cylinder, the corrosion and scaling adaptability to the inner wall of the sleeve are stronger, a cone and a slip are in Morse self-locking cone angle contact, the slip is formed by taking a quick drill composite material as a carrier and embedding hard alloy teeth, and the drilling, grinding and milling efficiencies are very high.

In order to achieve the above purpose, the invention adopts the following technical scheme: a dragable fast drilling long-acting cannula bridge plug comprising:

the outer surface of the upper joint is provided with an outer sleeve, the inner surface of the outer sleeve is provided with an outer piston, the inner surface of the outer piston is provided with an anti-blocking block, the inner surface of the outer piston is provided with an inner piston, the inner surface of the inner piston is provided with an inner central tube, and the outer surface of the inner piston is provided with a split pushing sleeve;

the outer surface of the outer central tube is provided with a slip, the outer surface of the slip is provided with a salvaging head, the outer surface of the slip is provided with a lock sleeve, the inner surface of the salvaging head is provided with a lock block, the outer surface of the outer central tube is provided with a lock ring seat, the right side of the lock ring seat is provided with an overload ring, the outer surface of the outer central tube and the right side of the overload ring are provided with a rubber cylinder seat, the outer surface of the rubber cylinder seat is fixedly connected with a compression rubber cylinder, and the outer surface of the rubber cylinder seat is provided with a cone;

the outer surface of outer center tube is provided with the slips, the right surface of slips is provided with the spacer sleeve, the right surface of spacer sleeve is provided with the expansion sheath, the upper surface of outer center tube is provided with the expansion packing element, the internal surface of outer center tube is provided with the uniflow ring, the internal surface of uniflow ring is provided with the ball seat cover, the left surface of ball seat cover is provided with the sealing ring, the internal surface of ball seat cover is provided with the ball seat, the surface of outer center tube is provided with the packing element seat, the surface of outer center tube is provided with the expansion sealing ring, the surface of outer center tube is provided with the locking ring, the right surface of locking ring is provided with the locking piece, the surface of outer center tube is provided with the lower clutch.

According to the first aspect of the invention, a long-acting cannula bridge plug capable of fishing and drilling is provided, a parallel ring is arranged on the left surface of the outer sleeve, and the left surface of the inner piston is contacted with an anti-blocking block.

According to a first aspect of the invention, there is provided a long-acting cannula bridge plug for a drag-and-drill, the inner surface of the lock sleeve being provided with a locking ring.

According to the first aspect of the invention, a long-acting cannula bridge plug capable of fishing and drilling is provided, the number of the compressed rubber barrels is multiple and is distributed at intervals, a spacing ring is arranged between the compressed rubber barrels, and the spacing ring is fixedly connected with a rubber barrel seat.

According to a first aspect of the invention, a long-acting cannula bridge plug capable of fishing and drilling is provided, and a locking ring is arranged on the inner surface of the positioning sleeve.

According to the first aspect of the invention, a long-acting cannula bridge plug capable of fishing and drilling is provided, an upper baffle ring is arranged on the outer surface of the rubber cylinder seat, and a lower union cap is arranged on the left surface of the upper baffle ring.

According to a first aspect of the invention there is provided a drag-and-drill long-term cannulated bridge plug, the outer surface of the lower cap being in contact with a lock sleeve.

The beneficial effects are that: the invention can drag for the long-acting intubate bridge plug of quick-drilling, expand the rubber cylinder and adopt the metal rubber whole vulcanization of the non-skeleton, rely on its sufficient thickness and elasticity, can carry on the automatic compensation to pack to the apparent rough fluctuation of the inner wall of the quill, corrosion, scale adaptability to the inner wall of the quill are stronger, cone and slips, it is the contact of Morse's self-locking cone angle, slips are quick-drilling composite material as carriers, inlay the hard alloy tooth to form, it is very high to bore and abrade, cover and mill the efficiency.

Drawings

The invention is further described below with reference to the drawings and examples;

FIG. 1 is an internal structural view of a long-acting cannulated bridge plug for a drag-over-drill in accordance with the present invention;

FIG. 2 is an enlarged schematic view of the structure A in FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;

FIG. 4 is an enlarged schematic view of the structure at C in FIG. 1;

FIG. 5 is an enlarged schematic view of the structure shown at D in FIG. 1;

FIG. 6 is an enlarged schematic view of the structure of FIG. 1 at E;

FIG. 7 is an enlarged schematic view of the structure shown at F in FIG. 1;

fig. 8 is an enlarged schematic view of the structure at G in fig. 1.

Legend description:

1. an upper joint; 2. and (3) ring combining; 3. a jacket; 4. an anti-blocking block; 5. an outer piston; 6. an inner piston; 7. split pushing sleeve; 8. an inner center tube; 9. a lock sleeve; 10. a fishing head; 11. a locking piece; 12. a lock ring seat; 13. a locking ring; 14. an overload ring; 15. lower cap; 16. an upper baffle ring; 17. a spacer ring; 18. a cartridge holder; 19. compressing a rubber cylinder; 20. a vertebral body; 21. a slip; 22. a seal ring; 23. a ball seat cover; 24. a ball seat; 25. a locking ring; 26. a locking block; 27. a positioning sleeve; 28. expanding the sheath; 29. expanding a rubber cylinder; 30. a uniflow ring; 31. expanding the deblocking ring; 32. an outer center tube; 33. and a lower joint.

Detailed Description

Reference will now be made in detail to the present embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present invention, but not to limit the scope of the present invention.

Referring to fig. 1-8, the long-acting cannula bridge plug capable of fishing and drilling comprises an upper joint 1, wherein an outer sleeve 3 is arranged on the outer surface of the upper joint 1, a parallel ring 2 is arranged on the left surface of the outer sleeve 3, the left surface of an inner piston 6 is in contact with an anti-blocking block 4, an outer piston 5 is arranged on the inner surface of the outer sleeve 3, an anti-blocking block 4 is arranged on the inner surface of the outer piston 5, an inner piston 6 is arranged on the inner surface of the outer piston 5, an inner central tube 8 is arranged on the inner surface of the inner piston 6, and a split pushing sleeve 7 is arranged on the outer surface of the inner piston 6.

The outer surface of outer center tube 32 is provided with slips 21, the surface of slips 21 is provided with salvage head 10, salvage head 10 goes upward and can release the deblocking and seal piece 11, the surface of slips 21 is provided with lock sleeve 9, the internal surface of lock sleeve 9 is provided with catch ring 13, the internal surface of salvage head 10 is provided with lock piece 11, the deblocking and seal piece 11 can radially expand, the surface of outer center tube 32 is provided with catch ring seat 12, the right side of catch ring seat 12 is provided with overload ring 14, the surface of outer center tube 32 and the right side that is located overload ring 14 are provided with rubber cylinder seat 18, the surface fixedly connected with compression rubber cylinder 19 of rubber cylinder seat 18, the quantity of compression rubber cylinder 19 is a plurality of and interval distribution, be provided with spacer ring 17 between the compression rubber cylinder 19, spacer ring 17 and rubber cylinder seat 18 fixed connection, rubber cylinder seat 18 can upwards support overload ring 14, the surface of rubber cylinder seat 18 is provided with cone 20.

The outer surface of outer center tube 32 is provided with slips 21, the right surface of slips 21 is provided with spacer sleeve 27, the internal surface of spacer sleeve 27 is provided with locking ring 25, the right surface of spacer sleeve 27 is provided with expansion sheath 28, the upper surface of outer center tube 32 is provided with expansion rubber sleeve 29, the internal surface of outer center tube 32 is provided with uniflow ring 30, the internal surface of uniflow ring 30 is provided with ball seat cover 23, the left surface of ball seat cover 23 is provided with sealing ring 22, the internal surface of ball seat cover 23 is provided with ball seat 24, the external surface of outer center tube 32 is provided with rubber sleeve 18, the external surface of rubber sleeve 18 is provided with upper retaining ring 16, the left surface of upper retaining ring 16 is provided with lower cap 15, the external surface of lower cap 15 is in contact with locking sleeve 9, the external surface of outer center tube 32 is provided with expansion release ring 31, the external surface of outer center tube 32 is provided with locking ring 25, the right surface of locking ring 25 is provided with locking piece 26, the external surface of outer center tube 32 is provided with lower joint 33.

Working principle: well-down anti-blocking: when the well is down, the split pushing sleeve 7 is in threaded connection with the inner piston 6 and is limited by the anti-blocking block 4 to be positioned at the upper joint 1, the outer piston 5 limits the expansion of the anti-blocking block 4, so that the split pushing sleeve 7, the inner piston 6 and the upper joint 1 are locked into a whole, the inner piston 6 and the split pushing sleeve 7 can be separated from the upper joint 1 only after the outer piston 5 is started downwards to release the anti-blocking block 4, a bridge plug can be started, and mechanical blocking outside the bridge plug can not be used for starting the bridge plug; the inner thread at the lower end of the split pushing sleeve 7 is connected with the lock sleeve 9 in a hanging way, the split pushing sleeve 7 is limited by the radial direction of the outer cylinder and can not be expanded, and the split pushing sleeve 7 and the lock sleeve 9 can not be disjointed, so that accidental starting of a bridge plug is prevented; hydraulic setting: the ball throwing plugging ball seat 24 is used for pressing an oil pipe at high pressure, the inner central pipe 8 bears pressure, the high pressure drives the outer piston 5 to cut and start a shear pin, the outer piston 5 moves downwards to release the anti-blocking lock block 4, the anti-blocking lock block 4 radially expands to release the inner piston 6, the outer piston 5, the inner piston 6 and the split pushing sleeve 7 move downwards to push the lock sleeve 9 synchronously, the lock sleeve 9 moves downwards at high pressure, the lock sleeve 9 moves downwards to sequentially push the upper baffle ring 16, the rubber sleeve, the spacer ring 17, the rubber sleeve seat 18 and the cone, the slips 21 are propped up and meshed with the sleeve to form a supporting anchor, when the anchoring anchor is finished, the rubber sleeve seat 18 does not move downwards any more, the outer piston 5, the inner piston 6 and the split pushing sleeve 7 continue to push the lock sleeve 9, the upper baffle ring 16, the rubber sleeve seat and the spacer ring 17 move downwards, the rubber sleeve is compressed and expanded to seal the upper sleeve and the lower sleeve of the bridge plug and can bear a certain pressure, when the inner pressure rises to a certain value, the hand shear pin is used for cutting off the inner central pipe 8 and the outer central pipe 32, the split pushing sleeve 7 is prevented from being separated from the outer sleeve 3, and the split sleeve 7 can be limited to radially and be connected with the split sleeve 7 and the inner sleeve 7 and the outer sleeve 7 can be pulled up and out of the inner sleeve 1 and the outer sleeve 7 and the threaded joint 1 and the outer sleeve 7 and the inner sleeve 7 and the outer sleeve is expanded; continuing to boost, shearing off the pressure-relief shear pin, throwing off the ball seat 24, relieving the pressure of the inner central tube 8, and ending the setting; because lock sleeve 9 and catch 13 are through the interlock of one-way screw thread, the stroke that takes place downwards when the lock sleeve 9 sits and seals is locked, even set hydraulic power disappears, the compression state of packing element suit, the anchoring state of slips 21 also can be maintained, when upper portion compression seal mechanism sits and seals, the center tube high pressure also passes through the one-way ring and presses to expanding packing element 29 inner chamber, drive expanding packing element 29 expansion laminating sleeve pipe forms sealedly, after the center tube pressure release, the one-way ring prevents expanding packing element 29 inner chamber high pressure to the center tube leakage current, thereby make expanding packing element 29 receive interior high pressure to seal continuously, two sets of sealing mechanism functions are relatively independent, even one of them sealing mechanism loses efficacy, the instrument is whole still sealed, whole salvage: the lower fishing tool captures the fishing head 10, the lifting pipe column shears the deblocking shear pin, the fishing head 10 ascends to release the deblocking block 11, the deblocking block 11 radially expands, the lock ring seat 12 axially releases the limit, the fishing head 10 drives the lock ring 9, the lock ring 13, the lock ring seat 12 and the rubber cylinder seat 18 to ascend until the rubber cylinder seat 18 upwards abuts against the overload ring 14, and the rubber cylinder is sleeved with accessories such as the spacer ring 17, the cone, the slips 21 and the like to radially and axially reset; simultaneously, the shear pins of the expansion deblocking ring 31 below the expansion rubber cylinder 29 are sheared, the expansion rubber cylinder 29 descends, the high pressure in the inner cavity is decompressed to the sleeve through the decompression groove outside the central tube, and the internal pressure of the expansion rubber cylinder 29 is decompressed and recovered. The bridge plug is integrally unsealed, a shaft can be fully lifted out, and overload salvaging is carried out: the lower fishing tool captures the fishing head 10, the lifting pipe column shears the deblocking shear pin, the fishing head 10 ascends to release the deblocking block 11, the deblocking block 11 radially expands, the lock ring seat 12 axially releases the limit, and the fishing head 10 drives the lock sleeve 9, the lock ring 13, the lock ring seat 12 and the rubber cylinder seat 18 to ascend until the rubber cylinder seat 18 upwards abuts against the overload ring 14; when the slips 21 cannot be de-anchored for a certain reason, the rubber cylinder seat 18 is used for cutting off the overload shear pins forcefully upwards, the overload ring 14 can be separated from the outer central pipe 32, the fishing head 10, the lock sleeve 9, the lock ring 13, the lock ring seat 12, the overload ring 14 and the rubber cylinder seat 18 are fished out of the shaft, the rubber cylinder sleeve, the spacer 17, the cone, the outer central pipe 32, the slips 21 and the lower joint 33 are reserved for hollow sleeve milling and releasing, and the sleeve milling and releasing efficiency is very high because the well-reserving tool is basically made of quick drilling composite materials and rubber; and (5) milling and unlocking: when the bridge plug is in overload salvage and needs to be drilled out, a hollow milling tool can be put into the hollow milling tool, and the compression sealing mechanism and the supporting anchoring mechanism which are mainly made of composite materials and rubber are efficiently sleeved and milled, so that the bridge plug is automatically unclamped, and subsequent milling or salvage is directly carried out, thereby greatly reducing the work load of well repair.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims (7)

1. A long-acting cannula bridge plug capable of fishing and drilling, which is characterized by comprising:

the upper joint (1), the surface of the upper joint (1) is provided with an outer sleeve (3), the inner surface of the outer sleeve (3) is provided with an outer piston (5), the inner surface of the outer piston (5) is provided with an anti-blocking block (4), the inner surface of the outer piston (5) is provided with an inner piston (6), the inner surface of the inner piston (6) is provided with an inner central tube (8), and the outer surface of the inner piston (6) is provided with a split pushing sleeve (7);

the outer surface of outer center tube (32) is provided with slips (21), the surface of slips (21) is provided with salvage head (10), the surface of slips (21) is provided with lock sleeve (9), the internal surface of salvage head (10) is provided with locking piece (11), the surface of outer center tube (32) is provided with catch seat (12), the right side of catch seat (12) is provided with overload ring (14), the surface of outer center tube (32) and the right side that is located overload ring (14) are provided with glue cartridge seat (18), the surface fixedly connected with compression glue cartridge (19) of glue cartridge seat (18), the surface of glue cartridge seat (18) is provided with centrum (20);

the outer surface of outer center tube (32) is provided with slips (21), the right surface of slips (21) is provided with spacer sleeve (27), the right surface of spacer sleeve (27) is provided with expansion sheath (28), the upper surface of outer center tube (32) is provided with expansion packing element (29), the internal surface of outer center tube (32) is provided with uniflow ring (30), the internal surface of uniflow ring (30) is provided with ball seat cover (23), the left surface of ball seat cover (23) is provided with sealing ring (22), the internal surface of ball seat cover (23) is provided with ball seat (24), the surface of outer center tube (32) is provided with glue cartridge seat (18), the surface of outer center tube (32) is provided with expansion deblocking ring (31), the surface of outer center tube (32) is provided with locking ring (25), the right surface of locking ring (25) is provided with locking piece (26), the surface of outer center tube (32) is provided with down and connects (33).

2. The long-acting cannula bridge plug capable of fishing and drilling according to claim 1, wherein a parallel ring (2) is arranged on the left surface of the outer sleeve (3), and the left surface of the inner piston (6) is in contact with the anti-blocking block (4).

3. A long-acting cannula bridge plug capable of being fished out and drilled in accordance with claim 1, characterized in that the inner surface of the lock sleeve (9) is provided with a lock ring (13).

4. The long-acting cannula bridge plug capable of fishing and drilling according to claim 1, wherein the number of the compressed rubber barrels (19) is multiple and is distributed at intervals, a spacing ring (17) is arranged between the compressed rubber barrels (19), and the spacing ring (17) is fixedly connected with a rubber barrel seat (18).

5. The long-acting cannula bridge plug capable of fishing and drilling according to claim 1, wherein the inner surface of the positioning sleeve (27) is provided with a locking ring (25).

6. The long-acting cannula bridge plug capable of fishing and drilling according to claim 1, wherein an upper baffle ring (16) is arranged on the outer surface of the rubber cylinder seat (18), and a lower cap (15) is arranged on the left surface of the upper baffle ring (16).

7. A long-acting cannula bridge plug capable of drilling at a fishing speed according to claim 1, wherein the outer surface of the lower union cap (15) is in contact with the lock sleeve (9).