CN214944150U

CN214944150U - Low-deblocking-force water injection packer

Info

Publication number: CN214944150U
Application number: CN202120646734.2U
Authority: CN
Inventors: 董乔云; 尚玉星; 朱荣
Original assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Current assignee: YANCHENG XINYUAN PETROCHEMICAL MACHINERY CO Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-30
Anticipated expiration: 2031-03-31

Abstract

The utility model belongs to the technical field of the water injection in the oil field is in the pit, especially, be a low deblocking power water injection packer, including central body, the surface cover of central body is equipped with the packing element center tube, the one end threaded connection of packing element center tube has the locking ring seat, the outer tank cover of locking ring seat is established and is installed the locking ring body, the packing element center tube passes through the locking piece with central body and is connected, the surface cover of packing element center tube is equipped with down the bearing seat, and bearing seat and locking piece laminating down, the screw thread end threaded connection of lower bearing seat has the locking ring cover. The utility model discloses sealed effect is better, and overall structure is compact, has reduced the instrument cost, can regard as well-flushing packer exclusive use, implements the water injection operation, and the latus rectum is big in the packer, can dispose purpose-made cable crossover sub auxiliary device that crosses, uses as cable packer for the operation of cable logging can realize "a tractor serves two purposes".

Description

Low-deblocking-force water injection packer

Technical Field

The utility model relates to an oil field water injection technical field in the pit specifically is a low deblocking power water injection packer.

Background

In the oil exploitation water injection operation, the water injection packer is particularly widely applied, the structural style is also various, the water injection operation is completed, and the water injection packer is lifted upwards for deblocking, so that the operation is simple and convenient. The packer deblocking requirements can be met by configuring a large-tonnage mechanical maintenance vehicle for a wellhead, but for part of oil fields, in order to save construction cost, a small-tonnage mechanical maintenance vehicle is configured, the provided lifting force is small, and the problem that some water injection packers have large deblocking force cannot be solved. Meanwhile, the requirement of cable logging also requires that the interior of the packer can pass through a cable to carry out downhole test operation, so that the overall structure of the water injection packer is required to be compact, and the inner drift diameter is required to be large. Therefore, a water injection packer with low deblocking force and capable of penetrating a cable is designed to meet diversified requirements of users.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a to prior art not enough, the utility model provides a low deblocking power water injection packer has solved the problem that proposes in the above-mentioned background art.

The second technical proposal.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

a low-deblocking-force water injection packer comprises a central pipe body, wherein a rubber cylinder central pipe is sleeved on the outer surface of the central pipe body, a lock ring seat is connected to one end of the rubber cylinder central pipe in a threaded manner, a lock ring body is arranged on an outer groove sleeve of the lock ring seat, the rubber cylinder central pipe is connected with the central pipe body through a lock block, a lower pressure bearing seat is sleeved on the outer surface of the rubber cylinder central pipe and is attached to the lock block, a lock ring sleeve is connected to the threaded end of the lower pressure bearing seat in a threaded manner, two side rubber cylinders, a middle rubber cylinder and two spacer rings are sleeved on the outer surface of the rubber cylinder central pipe far away from the lower pressure bearing seat, the two spacer rings are respectively arranged between the middle rubber cylinder and an adjacent side rubber cylinder, a locking cap is connected to the middle of the rubber cylinder central pipe in a threaded manner, an upper pressure bearing seat is sleeved on the outer surface of the rubber cylinder central pipe and is in a threaded manner, and the upper pressure bearing seat is in a threaded manner, the outer surface of the rubber cylinder central tube is sleeved with an upper rubber cylinder seat, an unsealing shear pin is installed between the upper rubber cylinder seat and an upper pressure bearing seat, the outer surface of the rubber cylinder central tube is sleeved with a backwashing piston, a stop cap is connected to the rubber cylinder central tube through threads, the backwashing piston comprises a piston main body, an inner sealing ring, an outer sealing ring and a combined sealing ring are respectively embedded and installed in inner and outer sealing grooves of the piston main body, a screw cap head is connected to the threaded end of the piston main body through threads, a press cap is connected to the screw cap head through threads, the press cap is tightly attached to the combined sealing ring, an upper connector is connected to one end of the central tube body through threads, an upper outer tube is connected to one end of the upper rubber cylinder seat through threads, a clamping screw cap is connected to the upper connector and the upper outer tube through threads, a setting piston is sleeved at the other end of the central tube body and is connected to the locking ring sleeve through threads, one end of the central pipe body is in threaded connection with a lower joint, the outer surface of the lower bearing seat is sleeved with a lower outer cylinder, the lower outer cylinder and the lower bearing seat are provided with a setting shear pin, the lower joint and the lower outer cylinder are in threaded connection with a fastening nut, one end of the lower joint is connected with a cable-passing conversion lower joint through threads, a lower cable hole is arranged on the cable-passing conversion lower joint, a slotted liner tube is arranged in the central tube body, one end of the upper joint is connected with a movable joint through threads, the surface of the movable joint is sleeved with an adjusting nut, a cable-passing conversion upper connector is arranged in the movable joint, adjusting nut and cable change go up connector threaded connection, go up the cable change and go up the embedded O type rubber circle of installing of excircle seal groove of connector, cable change goes up and has seted up cable hole on the connector.

Furthermore, a mounting hole and a mounting groove for mounting the locking block are respectively formed in the rubber cylinder central tube and the central tube body, and an O-shaped rubber ring is embedded in the outer circle sealing groove of the central tube body.

Furthermore, the inner and outer sealing grooves of the upper pressure bearing seat are respectively embedded with a sealing rubber ring which is matched with the inner and outer sealing grooves.

Furthermore, a sealing rubber ring which is matched with the inner sealing groove of the upper rubber cylinder seat is embedded in the inner sealing groove of the upper rubber cylinder seat.

Furthermore, an O-shaped rubber ring matched with the outer circle sealing groove on the upper joint is embedded in the outer circle sealing groove.

Further, go up the urceolus and all install locking pin with the threaded connection department of lock nut down, install locking pin on nut head and the pressure cap, locking pin is installed to the threaded connection department of adjusting nut and cable transition upper connector.

Furthermore, an upper backwashing hole is formed in the upper outer cylinder, a middle backwashing hole and a lower backwashing hole are formed in the rubber cylinder central tube, a backwashing channel is formed in an annular space between the central tube body and the rubber cylinder central tube, a pressure transmitting hole is formed in the central tube body, and a cable hole of the liner tube is formed in the slotted liner tube.

(III) advantageous effects

Compared with the prior art, the utility model provides a low deblocking power water injection packer possesses following beneficial effect:

the utility model discloses, through setting up the top connection, go up the urceolus, go up the cylinder base, deblocking shear pin and other parts constitute deblocking mechanism, through setting up the packing element center tube, the limit packing element, the spacer ring, well packing element, go up the bearing seat, sealing mechanism is constituteed to parts such as lower bearing seat, with deblocking mechanism design packer sealing mechanism's top, avoid external force to the influence of deblocking shear pin after the setting, can realize the demand of low deblocking power, deblocking shear pin can be according to the reasonable shear pin quantity of the tonnage configuration that lifts that user's derrick needs, can design less deblocking power. Design locking piece between central body and packing element center tube plays the locking effect between two parts, can not have the axial float before the deblocking, also avoids the deblocking shear pin to be cut off and lead to the deblocking in advance under the atress simultaneously. The unique combined sealing rubber ring design in the backwashing piston greatly improves the sealing effect, and the single-cylinder setting is designed, so that the whole structure is compact, the tool cost is reduced, and the combined sealing rubber ring can be used as a well washing packer to be used independently to implement water injection operation. The inner drift diameter of the packer is large, a specially-made cable adapter auxiliary device can be arranged, the packer can be used as a cable packer and used for cable logging operation, and the dual-purpose of one machine can be realized.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of the backwash piston of the present invention;

FIG. 3 is a schematic cross-sectional view of the lock block B-B shown in FIG. 1 according to the present invention;

fig. 4 is the utility model discloses join in marriage the water injection packer overall structure schematic diagram that can pass the cable behind the customization cable joint.

In the figure: 1. an upper joint; 2. a lower joint; 3. an upper outer cylinder; 301. an upper backwash hole; 4. a blocking cap; 5. a central tube of the rubber cylinder; 501. a middle backwash well; 502. a backwash channel; 503. a lower backwash hole; 6. a central tube body; 601. a pressure transfer hole; 7. backwashing the piston; 71. a piston body; 72. an inner seal ring; 73. an outer sealing ring; 74. a combined sealing ring; 75. a nut head; 76. pressing the cap; 8. an upper rubber cylinder seat; 9. unsealing the shear pins; 10. an upper bearing seat; 11. a locking cap; 12. a middle rubber cylinder; 13. a spacer ring; 14. an edge rubber cylinder; 15. a lower bearing seat; 16. setting the shear pin; 17. a locking block; 18. a lock ring seat; 19. a lock ring body; 20. a lock ring sleeve; 21. a lower outer cylinder; 22. setting a piston; 23. the upper connector is converted by the passing cable; 2301. an upper cable hole; 24. a movable joint; 25. adjusting the nut; 26. slotting liner tubes; 2601. lining a pipe cable hole; 27. the lower connector is converted by passing a cable; 2701. and (4) a cable hole is arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1-4, an embodiment of the present invention provides a low-deblocking-force water injection packer, which comprises a central tube 6, wherein an outer surface of the central tube 6 is sleeved with a central tube 5, one end of the central tube 5 is connected with a lock ring seat 18 through a thread, an outer groove of the lock ring seat 18 is sleeved with a lock ring body 19, the central tube 5 is connected with the central tube 6 through a lock block 17, the outer surface of the central tube 5 is sleeved with a lower bearing seat 15, the lower bearing seat 15 is attached to the lock block 17, the thread end of the lower bearing seat 15 is connected with a lock ring sleeve 20 through a thread, the outer surface of the central tube 5, which is far away from the lower bearing seat 15, is sleeved with two side rubber tubes 14, a middle rubber tube 12 and two spacer rings 13, the two spacer rings 13 are respectively disposed between the middle rubber tube 12 and an adjacent side rubber tube 14, the middle part of the central tube 5 is connected with a lock cap 11 through a thread, the outer surface of the central tube 5 is sleeved with an upper bearing seat 10, an upper bearing seat 10 is in threaded connection with a locking cap 11, an upper rubber cylinder seat 8 is sleeved on the outer surface of a rubber cylinder central tube 5, a deblocking shear pin 9 is installed between the upper rubber cylinder seat 8 and the upper bearing seat 10, a backwashing piston 7 is sleeved on the outer surface of the rubber cylinder central tube 5, a blocking cap 4 is in threaded connection with the rubber cylinder central tube 5, the backwashing piston 7 comprises a piston main body 71, inner and outer sealing grooves of the piston main body 71 are respectively embedded and installed with an inner sealing ring 72, an outer sealing ring 73 and a combined sealing ring 74, a threaded end of the piston main body 71 is in threaded connection with a nut head 75, a pressing cap 76 is in threaded connection with the nut head 75, the pressing cap 76 is tightly attached to the combined sealing ring 74, an upper connector 1 is in threaded connection with one end of a central tube body 6, an upper outer tube 3 is in threaded connection with one end of the upper rubber cylinder seat 8, a tightening nut is in threaded connection with the upper connector 1 and the upper outer tube 3, and a setting piston 22 is sleeved on the other end of the central tube body 6, the seat sealing piston 22 is in threaded connection with the lock ring sleeve 20, one end of the central pipe body 6 is in threaded connection with the lower joint 2, the outer surface of the lower pressure bearing seat 15 is sleeved with the lower outer cylinder 21, the lower outer cylinder 21 and the lower pressure bearing seat 15 are provided with the seat sealing shear pin 16, the lower joint 2 and the lower outer cylinder 21 are in threaded connection with the fastening nut, one end of the lower joint 2 is in threaded connection with the cable switching lower joint 27 through threads, the cable switching upper joint 23 is arranged in the cable switching lower joint 27, the slotted liner tube 26 is arranged in the central pipe body 6, one end of the upper joint 1 is in threaded connection with the movable joint 24, the surface of the movable joint 24 is sleeved with the adjusting nut 25, the cable switching upper joint 23 is arranged in the movable joint 24, the adjusting nut 25 is in threaded connection with the cable switching upper outer circle joint 23, an O-shaped rubber ring is embedded in a sealing groove of the cable switching upper joint 23, and the cable switching upper cable hole 2301 is arranged in the cable switching upper joint 23.

In some embodiments, the rubber tube central tube 5 and the central tube body 6 are respectively provided with a mounting hole and a mounting groove for mounting the locking block 17, so that the locking block 17 is conveniently mounted, and an O-shaped rubber ring is embedded in the outer circle sealing groove of the central tube body 6, so that the sealing effect can be improved.

In some embodiments, the inner and outer sealing grooves of the upper pressure bearing block 10 are respectively embedded with a sealing rubber ring, which can improve the sealing effect.

In some embodiments, a sealing rubber ring is embedded and installed in the inner sealing groove of the upper rubber cylinder base 8, so that the sealing effect can be improved.

In some embodiments, an adaptive O-shaped rubber ring is embedded in the outer circle sealing groove of the upper joint 1 to improve the sealing effect.

In some embodiments, the screw joints of the upper outer cylinder 3 and the lower outer cylinder 21 and the clamping nuts are respectively provided with the anti-loosening pins, the nut head 75 and the pressing cap 76 are provided with the anti-loosening pins, and the screw joint of the adjusting nut 25 and the over-cable switching upper connector 23 is provided with the anti-loosening pins, so that the loosening of the screw thread can be avoided, and the fixing effect can be improved.

In some embodiments, the upper outer cylinder 3 is provided with an upper backwashing hole 301, the rubber cylinder central tube 5 is provided with a middle backwashing hole 501 and a lower backwashing hole 503, an annular space between the central tube body 6 and the rubber cylinder central tube 5 forms a backwashing channel 502, the central tube body 6 is provided with a pressure transmitting hole 601, and the slotted liner tube 26 is provided with a liner tube cable hole 2601.

The utility model discloses a theory of operation and use flow: the packer is connected to an oil pipe column, hydraulic pressure is applied to the oil pipe after the packer is lowered to a downhole design position, the hydraulic pressure pushes a backwashing piston 7 to close through a pressure transfer hole 601 on a central pipe body 6, meanwhile, the setting piston 22 is pushed to move in a hydraulic mode, when the pressure reaches a certain value, a setting shear pin 16 is sheared, under the action of the hydraulic pressure, the setting piston 22 continues to move upwards to compress a side rubber cylinder 14 and a middle rubber cylinder 12 to seal an oil sleeve annulus, after pressure relief, a locking ring body 19 and a locking ring sleeve 20 enter an occlusion locking state to prevent a packing part from rebounding, the setting of the packer is completed, after the packer is set, the packer is pressurized from the oil sleeve annulus, flushing fluid enters from an upper backwashing hole 301 of an upper outer cylinder 3 to push the backwashing piston 7 to move upwards to open a backwashing channel 502, the flushing fluid flows out through the middle backwashing hole 501, the backwashing channel 502 and a lower backwashing hole 503, then enters the oil pipe from the bottom of the oil pipe column and returns to the ground to achieve the purpose of backwashing, lifting the pipe column, because of the friction of sealed packing element and sheathed tube keeps motionless, with the last clamping nut that top connection 1 is connected, go up urceolus 3, go up barrel holder 8 and cut deblocking shear pin 9, top connection 1 also drives parts such as central body 6 and shifts up simultaneously, locking piece 17 breaks away from, locking ring holder 18 loses the support, then locking ring 19 is retrieved and is lost the locking, the packing element kick-backs, accomplish the packer deblocking, after water injection packer links together with crossing cable crossover sub auxiliary device, the inside cable hole penetrates the cable and goes into the well, except normal water injection packer function, still can implement the logging operation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a low deblocking power water injection packer which characterized in that: the rubber tube sealing device comprises a central tube body (6), wherein a rubber tube central tube (5) is sleeved on the outer surface of the central tube body (6), one end of the rubber tube central tube (5) is in threaded connection with a lock ring seat (18), a lock ring body (19) is arranged on an outer groove sleeve of the lock ring seat (18), the rubber tube central tube (5) is connected with the central tube body (6) through a lock block (17), a lower pressure bearing seat (15) is sleeved on the outer surface of the rubber tube central tube (5), the lower pressure bearing seat (15) is attached to the lock block (17), a lock ring sleeve (20) is in threaded connection with the threaded end of the lower pressure bearing seat (15), two side rubber tubes (14), a middle rubber tube (12) and two spacer rings (13) are sleeved on the outer surface of the end, far away from the lower pressure bearing seat (15), of the rubber tube central tube (5), the two spacer rings (13) are respectively arranged between the middle rubber tube (12) and an adjacent side rubber tube (14), the middle part of the rubber cylinder central pipe (5) is in threaded connection with a locking cap (11), the outer surface of the rubber cylinder central pipe (5) is sleeved with an upper pressure bearing seat (10), the upper pressure bearing seat (10) is in threaded connection with the locking cap (11), the outer surface of the rubber cylinder central pipe (5) is sleeved with an upper rubber cylinder seat (8), a deblocking shear pin (9) is installed between the upper rubber cylinder seat (8) and the upper pressure bearing seat (10), the outer surface of the rubber cylinder central pipe (5) is sleeved with a backwashing piston (7), the rubber cylinder central pipe (5) is in threaded connection with a blocking cap (4), the backwashing piston (7) comprises a piston main body (71), inner sealing rings (72), outer sealing rings (73) and combined sealing rings (74) are respectively embedded into inner and outer sealing grooves of the piston main body (71), and a screw thread end of the piston main body (71) is in threaded connection with a screw cap head (75), the combined sealing ring is characterized in that a pressing cap (76) is connected to the screw cap head (75) through threads, the pressing cap (76) is tightly attached to a combined sealing ring (74), an upper joint (1) is connected to one end of the central pipe body (6) through threads, an upper outer cylinder (3) is connected to one end of the upper cylinder seat (8) through threads, a tightening nut is connected to the upper joint (1) and the upper outer cylinder (3) through threads, a setting piston (22) is sleeved on the other end of the central pipe body (6), the setting piston (22) is connected with a locking ring sleeve (20) through threads, a lower joint (2) is connected to one end of the central pipe body (6) through threads, a lower outer cylinder (21) is sleeved on the outer surface of the lower bearing seat (15), setting shear nails (16) are installed on the lower outer cylinder (21) and the lower bearing seat (15), and tightening nuts are connected to the lower joint (2) and the lower outer cylinder (21) through threads, the one end of lower clutch (2) has connector (27) under cable conversion through threaded connection, cable hole (2701) down has been seted up on connector (27) under cable conversion, install slotted bushing pipe (26) in central body (6), the one end threaded connection of top connection (1) has union (24), the surface cover of union (24) is equipped with adjusting nut (25), install in union (24) cable conversion and go up connector (23), adjusting nut (25) and cable conversion go up connector (23) threaded connection, it installs O type rubber circle to go up the embedding in the excircle seal groove of connector (23) in cable conversion, cable hole (2301) have been seted up on cable conversion last connector (23).

2. The low unsetting force water injection packer of claim 1, wherein: the rubber cylinder central tube (5) and the central tube body (6) are respectively provided with a mounting hole and a mounting groove for mounting the locking block (17), and an O-shaped rubber ring is embedded in an outer circle sealing groove of the central tube body (6).

3. The low unsetting force water injection packer of claim 1, wherein: and the inner and outer sealing grooves of the upper pressure bearing seat (10) are respectively embedded with sealing rubber rings which are matched with each other.

4. The low unsetting force water injection packer of claim 1, wherein: and a sealing rubber ring which is matched with the inner sealing groove of the upper rubber cylinder seat (8) is embedded in the inner sealing groove.

5. The low unsetting force water injection packer of claim 1, wherein: and an O-shaped rubber ring which is matched with the outer circle sealing groove on the upper joint (1) is embedded in the outer circle sealing groove.

6. The low unsetting force water injection packer of claim 1, wherein: go up urceolus (3) and urceolus (21) down and the threaded connection department of lock nut all installs locking pin, install locking pin on nut head (75) and pressure cap (76), locking pin is installed with the threaded connection department that passes cable conversion upper connector (23) in adjusting nut (25).

7. The low unsetting force water injection packer of claim 1, wherein: the rubber tube back washing device is characterized in that an upper back washing hole (301) is formed in the upper outer tube (3), a middle back washing hole (501) and a lower back washing hole (503) are formed in the rubber tube central tube (5), an annular space between the central tube body (6) and the rubber tube central tube (5) forms a back washing channel (502), a pressure transmitting hole (601) is formed in the central tube body (6), and a liner tube cable hole (2601) is formed in the slotted liner tube (26).