CN214741209U

CN214741209U - Drillable and fishable layered water injection packer

Info

Publication number: CN214741209U
Application number: CN202120562465.1U
Authority: CN
Inventors: 张百慧; 王添跃; 王文龙
Original assignee: Daqing Taize Machinery Processing Co ltd
Current assignee: Daqing Taize Machinery Processing Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2021-11-16
Anticipated expiration: 2031-10-13

Abstract

The utility model belongs to the field of oil field downhole tools, in particular to a drillable and fishable separated layer water injection packer, which comprises a central tube, a liner tube, a rubber cylinder and a setting mechanism component, wherein the liner tube is fixedly arranged at the outer side of the central tube, the rubber cylinder is sleeved on the liner tube, and the upper end of the liner tube is fixedly provided with a baffle ring for blocking the rubber cylinder; the upper end of the central pipe is connected with a mounting joint component; the safety joint assembly comprises an inner pipe, an upper joint, a connecting sleeve, a piston sleeve, a sliding sleeve, a locking ball, a safety pin, a rotating pin and a slideway pin; the lower end of the inner pipe is fixedly connected to the upper end of the central pipe, the connecting sleeve is sleeved on the outer side of the inner pipe, the upper end of the connecting sleeve is connected to the inner side of the lower end of the upper connector through threads, and the upper end of the piston sleeve is connected to the outer side of the lower end of the upper connector through threads. The utility model provides a water injection packer of deblocking can mill adopts conventional well workover equipment can accomplish the layering water injection tubular column and mill deblocking and separate the card, has avoided the cost-push that the overhaul operation caused.

Description

Drillable and fishable layered water injection packer

Technical Field

The utility model belongs to the oil field instrument field in the pit especially relates to a can bore and drag for separate layer water injection packer.

Background

In the process of oil field development, for an oil reservoir consisting of multiple oil layers and multiple sand bodies, crude oil is required to be extracted from a bottom oil layer to the ground, so that the sustainability of crude oil extraction and development is kept, and the crude oil is usually extracted by adopting a water injection mode. Because the development is carried out by using a water injection mode, the formation pressure can be promoted to maintain a relatively balanced state in the aspects of extraction and injection, an oil layer is ensured to have enough driving energy, and the sustainable development of oilfield development can be realized; meanwhile, the packer is used for water injection development in the development process, so that the technical requirements of zonal water injection and subdivision oil extraction can be met, the purposes of isolating a production zone, controlling production (injection) liquid and protecting a casing can be achieved, and the subdivision injection and extraction of the oil-water well by using the packer is more economical and convenient than other subdivision injection and extraction in terms of cost and operation.

However, with the continuous development of the subdivided injection and production process, the subdivided injection and production degree is gradually increased, and meanwhile, due to the influence of the water quality of injected water, the underground tool is seriously corroded and scales, so that the underground tool structure mainly comprising the packer loses the action function, the most important phenomenon is that a pipe column is pulled out and cannot be unsealed, the underground packer cannot be unsealed by adopting major workover equipment, the construction period is long, the cost is high, and the production operation is seriously influenced.

In some oil fields, due to the complexity of water quality of injected water, corrosion and scaling of an underground tool are serious in the long-term water injection production process, so that the structure of the underground tool mainly comprising a packer loses the action function, the most important phenomenon is that a pipe column is pulled out, namely, the packer cannot be unsealed, the underground packer cannot be unsealed by adopting overhaul and workover equipment, the construction period is long, the cost is high, and the production operation is seriously influenced.

Disclosure of Invention

The utility model provides a can bore and drag for separate layer water injection packer to solve the problem of proposing among the above-mentioned background art.

The utility model provides a technical problem adopt following technical scheme to realize: the utility model provides a drillable and fishable separated layer water injection packer, which comprises a central tube, a liner tube, a rubber tube and a setting mechanism component, wherein the liner tube is fixedly arranged at the outer side of the central tube, the rubber tube is sleeved on the liner tube, and the upper end of the liner tube is fixedly provided with a baffle ring for blocking the rubber tube;

the upper end of the central pipe is connected with a mounting joint assembly;

the safety joint assembly comprises an inner pipe, an upper joint, a connecting sleeve, a piston sleeve, a sliding sleeve, a locking ball, a safety pin, a rotating pin and a slideway pin;

the lower end of the inner pipe is fixedly connected to the upper end of the central pipe, the connecting sleeve is sleeved on the outer side of the inner pipe, the upper end of the connecting sleeve is connected to the inner side of the lower end of the upper connector through threads, and the upper end of the piston sleeve is connected to the outer side of the lower end of the upper connector through threads;

the sliding sleeve is arranged in an annular space between the connecting sleeve and the piston sleeve and is connected to the connecting sleeve through a safety pin, a through hole for containing the lock ball is formed in the side wall of the connecting sleeve, the lock ball is arranged in the through hole, a blind hole matched with the lock ball is formed in the outer wall of the inner pipe, the lock ball extends into the blind hole, meanwhile, the lock ball abuts against the inner wall of the sliding sleeve, a retreating hole for retreating the lock ball is formed in the inner wall of the sliding sleeve, the retreating hole is located above the lock ball, and a magnet for adsorbing the lock ball is arranged in the retreating hole;

a liquid passing hole is formed in the side wall of the connecting sleeve and corresponds to the space above the sliding sleeve;

the rotating pin is laterally arranged on the connecting sleeve, a blind hole is formed in the outer side of the inner pipe and corresponds to the rotating pin, and the tail end of the rotating pin is inserted into the blind hole;

an L-shaped slideway is processed on the outer side of the inner pipe, and the structure of the L-shaped slideway comprises a horizontal section and a vertical section;

the slide way pin is laterally arranged on the connecting sleeve, and the tail end of the slide way pin is inserted into the horizontal section of the L-shaped slide way, so that the connecting sleeve is prevented from being axially separated from the inner pipe.

As a further technical scheme, the maximum diameter of the inner pipe is equal to the inner diameter of the rubber cylinder.

As a further technical scheme, the baffle ring is a component and comprises an outer steel ring, an inner steel ring and a non-metal ring, wherein the inner steel ring and the non-metal ring are both connected to the upper end of the liner pipe through threads, and the inner steel ring and the non-metal ring are connected through a stud;

the outer steel hoop is arranged on the outer side of the inner steel ring and the outer side of the non-metal ring, and the axial size of the outer steel ring is equal to the sum of the axial sizes of the inner steel ring and the non-metal ring.

As a further technical scheme, the non-metal ring is made of polyether-ether-ketone.

As a further technical scheme, the non-metal ring is made of polyformaldehyde.

The utility model has the advantages that: the utility model provides a water injection packer of deblocking can mill adopts conventional well workover equipment can accomplish the layering water injection tubular column and mill deblocking and separate the card, has avoided the cost-push that the overhaul operation caused. When the water injection tubular column is pulled out motionlessly, to the intraductal pressure of beating of tubular column, pressure process cross the liquid hole and arrive the sliding sleeve upside and promote the sliding sleeve to cut off the safety pin, then make the sliding sleeve slide down, when the hole of moving back on the sliding sleeve with the lock ball is adjusted the back well, the lock ball is adsorbed by magnet and takes off in the blind hole from the inner tube outside and makes the locking effect of lock ball relieve, and at this moment, the adapter sleeve can with the inner tube relative rotation. The rotating pin is sheared by the rotating pipe column and the connecting sleeve is rotated, so that the slideway pin arranged on the connecting sleeve can slide out of the L-shaped slideway, and the pipe column on the upper part of the packer is separated. Then a milling tool is put in, the blocking ring of the packer rubber cylinder is ground off, and the packer rubber cylinder is popped upwards to be unsealed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged fragmentary view of the safety joint assembly of FIG. 1;

fig. 3 is a plan expanded view of the cylindrical surface of the L-shaped slide on the outside of the inner tube.

In the figure: 1. an upper joint; 2. a piston sleeve; 3. a liquid passing hole; 4. a piston; 5. a magnet; 6. a locking ball 7 and a safety pin; 8. rotating the pin; 9. connecting sleeves; 10. a slideway pin; 11. an inner tube; 12. an outer steel ring; 13. a non-metallic ring; 14. an inner steel ring; 15. a rubber cylinder; 16. a liner tube; 17. a central tube; 18. a horizontal section; 19. a vertical section.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1, the present embodiment includes a base pipe 17, a liner pipe 16, a rubber cylinder 15 and a setting mechanism assembly, wherein the liner pipe 16 is fixedly installed on the outer side of the base pipe 17, the rubber cylinder 15 is sleeved on the liner pipe 16, and a stop ring for stopping the rubber cylinder 15 is fixed on the upper end of the liner pipe 16. The above is a conventional structure in the prior art, and is not described in detail herein.

As shown in fig. 1, the upper end of the center tube 17 is connected with a mounting joint assembly;

as shown in fig. 1 and 2, the safety joint assembly includes an inner pipe 11, an upper joint 1, a connecting sleeve 9, a piston sleeve 2, a sliding sleeve 4, a locking ball 6, a safety pin 7, a rotating pin 8 and a slideway pin 10, and all the parts are tightly matched to work to complete a plurality of consecutive actions.

As shown in fig. 1 and 2, the lower end of the inner pipe 11 is fixedly connected to the upper end of the central pipe 17, the connecting sleeve 9 is sleeved outside the inner pipe 11, the upper end of the connecting sleeve 9 is connected to the inner side of the lower end of the upper joint 1 through a thread, and the upper end of the piston sleeve 2 is connected to the outer side of the lower end of the upper joint 1 through a thread; the sliding sleeve 4 is arranged in an annular space between the connecting sleeve 9 and the piston sleeve 2 and is connected to the connecting sleeve 9 through a safety pin 7, a through hole for accommodating the lock ball 6 is formed in the side wall of the connecting sleeve 9, the lock ball 6 is arranged in the through hole, a blind hole matched with the lock ball 6 is formed in the outer wall of the inner tube 11, the lock ball 6 extends into the blind hole, meanwhile, the lock ball 6 abuts against the inner wall of the sliding sleeve 4, a retreating hole for retreating the lock ball 6 is formed in the inner wall of the sliding sleeve 4 and is positioned above the lock ball 6, and a magnet 5 for adsorbing the lock ball 6 is arranged in the retreating hole; the side wall of the connecting sleeve 9 is provided with a liquid passing hole 3 corresponding to the space above the sliding sleeve 4; the rotating pin 8 is laterally arranged on the connecting sleeve 9, a blind hole is formed in the outer side of the inner pipe 11 and corresponds to the rotating pin 8, and the tail end of the rotating pin 8 is inserted into the blind hole.

As shown in fig. 1 and 3, an L-shaped slideway is machined on the outer side of the inner pipe 11, and the structure of the L-shaped slideway comprises a horizontal section 18 and a vertical section 19; the slide pin 10 is laterally mounted on the connecting sleeve 9, and the end of the slide pin 10 is inserted in the horizontal section 18 of the L-shaped slide, so as to prevent the connecting sleeve 9 from axially disengaging from the inner pipe 11.

Under normal conditions, the connecting sleeve 9 and the inner pipe 11 are locked together by the locking ball 6 in the safety joint assembly, so that the connecting sleeve 9 and the inner pipe 11 cannot move relatively in the axial direction and the circumferential direction, and the tensile load borne by the safety joint assembly completely acts on the locking ball 6. The safety pin 7, the rotating pin 8 and the slideway pin 10 are not loaded.

When the safety locking device works, the safety locking device is pressed into a pipe column, pressure passes through the liquid passing hole 3 and reaches the upper side of the sliding sleeve 4 and pushes the sliding sleeve 4 to cut off the safety pin 7, then the sliding sleeve 4 slides downwards, when a retreating hole in the sliding sleeve 4 is aligned with the locking ball 6, the locking ball 6 is adsorbed by the magnet 5 and is taken off from a blind hole in the outer side of the inner pipe 11, so that the locking effect of the locking ball 6 is relieved, and at the moment, the connecting sleeve 9 can rotate relative to the inner pipe 11. The swivel pin 8 is sheared by the swivel string and the connecting sleeve 9 is rotated, so that the slide pin 10 mounted on the connecting sleeve 9 slides out of the L-shaped slide, thereby disengaging the upper string of the packer. Then a milling tool is put in, the blocking ring of the packer rubber sleeve 15 is ground off, and the packer rubber sleeve 15 is ejected upwards to be unsealed.

As shown in fig. 1, the maximum diameter of the inner tube 11 is equal to the inner diameter of the rubber sleeve 15, so that the cutter face of the milling tool directly acts on the retainer ring, and the milling efficiency is improved.

As shown in figure 1, in order to make the retaining ring more easily grind and simultaneously take into account the structural strength of the retaining ring, the utility model discloses to keep off the ring and designed into an subassembly, its structure includes outer steel ring 12, interior steel ring 14 and non-metallic ring 13, wherein, interior steel ring 14 and non-metallic ring 13 are all through threaded connection in the upper end of bushing pipe 16, through stud connection between interior steel ring 14 and the non-metallic ring 13. The outer steel ring 12 is hooped outside the inner steel ring 14 and the non-metal ring 13, and the axial dimension of the outer steel ring 12 is equal to the sum of the axial dimensions of the inner steel ring 14 and the non-metal ring 13. The material of the non-metal ring 13 is polyetheretherketone or polyformaldehyde. Compared with the solid steel structure of integral type, above-mentioned structure is torn or broken more easily when milling, consequently can effectively improve milling efficiency.

Claims

1. The utility model provides a can bore and drag for separate zone water injection packer, includes center tube (17), bushing pipe (16), packing element (15) and sits and seals the mechanism subassembly, and bushing pipe (16) fixed mounting is in the outside of center tube (17), and packing element (15) suit is on bushing pipe (16), and the upper end of bushing pipe (16) is fixed with the fender ring that is used for blockking packing element (15), its characterized in that:

the upper end of the central pipe (17) is connected with a mounting joint assembly;

the safety joint component comprises an inner pipe (11), an upper joint (1), a connecting sleeve (9), a piston sleeve (2), a sliding sleeve (4), a locking ball (6), a safety pin (7), a rotating pin (8) and a slideway pin (10);

the lower end of the inner pipe (11) is fixedly connected to the upper end of the central pipe (17), the connecting sleeve (9) is sleeved on the outer side of the inner pipe (11), the upper end of the connecting sleeve (9) is connected to the inner side of the lower end of the upper connector (1) through threads, and the upper end of the piston sleeve (2) is connected to the outer side of the lower end of the upper connector (1) through threads;

the sliding sleeve (4) is arranged in an annular space between the connecting sleeve (9) and the piston sleeve (2) and is connected to the connecting sleeve (9) through a safety pin (7), a through hole for accommodating the lock ball (6) is formed in the side wall of the connecting sleeve (9), the lock ball (6) is arranged in the through hole, a blind hole matched with the lock ball (6) is formed in the outer wall of the inner tube (11), the lock ball (6) extends into the blind hole, meanwhile, the lock ball (6) abuts against the inner wall of the sliding sleeve (4), a retreating hole for retreating the lock ball (6) is formed in the inner wall of the sliding sleeve (4), the retreating hole is formed above the lock ball (6), and a magnet (5) for adsorbing the lock ball (6) is arranged in the retreating hole;

the side wall of the connecting sleeve (9) is provided with a liquid passing hole (3) corresponding to the space above the sliding sleeve (4);

the rotating pin (8) is laterally arranged on the connecting sleeve (9), a blind hole is formed in the outer side of the inner pipe (11) and corresponds to the rotating pin (8), and the tail end of the rotating pin (8) is inserted into the blind hole;

an L-shaped slideway is processed on the outer side of the inner pipe (11), and the structure of the L-shaped slideway comprises a horizontal section (18) and a vertical section (19);

the slideway pin (10) is laterally arranged on the connecting sleeve (9), and the tail end of the slideway pin (10) is inserted into the horizontal section (18) of the L-shaped slideway, so that the connecting sleeve (9) is prevented from axially separating from the inner pipe (11).

2. The drillable and fishable zonal injection packer of claim 1, wherein: the maximum diameter of the inner pipe (11) is equal to the inner diameter of the rubber cylinder (15).

3. The drillable and fishable zonal injection packer of claim 1, wherein: the retaining ring is an assembly and comprises an outer steel ring (12), an inner steel ring (14) and a non-metal ring (13), wherein the inner steel ring (14) and the non-metal ring (13) are both connected to the upper end of the liner tube (16) through threads, and the inner steel ring (14) and the non-metal ring (13) are connected through a stud;

the outer steel ring (12) is hooped at the outer side of the inner steel ring (14) and the non-metal ring (13), and the axial size of the outer steel ring (12) is equal to the sum of the axial sizes of the inner steel ring (14) and the non-metal ring (13).

4. The drillable and fishable zonal injection packer of claim 3, wherein: the nonmetal ring (13) is made of polyether-ether-ketone.

5. The drillable and fishable zonal injection packer of claim 3, wherein: the non-metal ring (13) is made of polyformaldehyde.