CN210264603U

CN210264603U - Hydraulic deblocking device

Info

Publication number: CN210264603U
Application number: CN201920996027.9U
Authority: CN
Inventors: 王吉忠; 王昌彬; 吴小娟
Original assignee: Jiangsu Like Petroleum Machinery Co ltd
Current assignee: Jiangsu Like Petroleum Machinery Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-04-07
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a hydraulic deblocking device, which comprises an upper joint and a central tube which is movably inserted in the upper joint in a sealing way, wherein the lower end of the upper joint is sequentially connected with an outer sleeve and a lock sleeve; a limiting sleeve and a piston are hermetically arranged in an annular cavity between the outer sleeve and the central pipe, the limiting sleeve is connected with the outer sleeve through a shear pin, the limiting sleeve is fixedly connected with the central pipe, and the lower end of the piston is clamped between the elastic clamping jaw and the outer sleeve; the pipe wall between the limiting sleeve and the piston on the central pipe is provided with a central pipe liquid inlet hole, and the pipe wall between the piston and the lock sleeve on the outer sleeve is provided with an outer sleeve liquid inlet hole. Adopt the utility model discloses a hydraulic pressure deblocking ware can reduce the deblocking load, reduces deblocking power demand, guarantees that the deblocking operation of oil well goes on smoothly.

Description

Hydraulic deblocking device

Technical Field

The utility model relates to an oil field instrument in pit especially relates to an instrument convenient to each instrument deblocking in pit.

Background

In oil wells of oil fields, packers are used in order to seal the annular space between strings of various sizes and well bores and between strings of strings, isolate production zones, control production (injection) fluids, and protect casing, and a plurality of packers are used in the same oil well, when the packer needs to be unsealed, generally, the central pipe column is lifted, but the packer has deblocking resistance, the lifting of the central pipe column needs certain acting force, because the number of packers in the oil well is large, each packer can generate corresponding deblocking resistance when the central pipe column is lifted up, the overall unsetting load is thus very high, which entails a certain risk for the unsetting operation of the well, which, in addition to the need to provide a large power, may also damage the centre string, especially for the upper centre string, which needs to withstand the unsetting resistance of all packers.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art exists, the utility model aims to solve the technical problem that a hydraulic pressure deblocking ware is provided, it can reduce the deblocking load, reduces deblocking power demand, guarantees that the deblocking operation of oil well goes on smoothly.

In order to solve the technical problem, the utility model discloses a hydraulic deblocking device, including top connection and center tube, the activity of sealed upper end of center tube is pegged graft in the top connection, is connected with the outer tube at the top connection lower extreme, and the lower extreme of outer tube is connected with the lock sleeve, and the hole of lock sleeve movably cup joints on the center tube excircle, is equipped with the elasticity jack catch in the upper end of lock sleeve, and the jack catch card of elasticity jack catch upper end is inserted on the center tube; a limiting sleeve is arranged above the annular cavity between the outer sleeve and the central pipe, a sealing device is arranged between the limiting sleeve and the outer sleeve and is connected with the outer sleeve through a shear pin, the sealing device is arranged between the limiting sleeve and the central pipe and is fixedly connected with the central pipe, a piston is arranged below the annular cavity between the outer sleeve and the central pipe, and the lower end of the piston is clamped between the elastic clamping jaws and the outer sleeve; the pipe wall of the central pipe is provided with a central pipe liquid inlet hole which is positioned between the limiting sleeve and the piston, and the pipe wall of the outer sleeve is provided with an outer sleeve liquid inlet hole which is positioned between the piston and the lock sleeve.

In the structure, because the upper end of the central pipe is movably inserted in the upper joint in a sealing manner, the lower end of the upper joint is connected with the outer sleeve, the lower end of the outer sleeve is connected with the lock sleeve, the inner hole of the lock sleeve is movably sleeved on the outer circle of the central pipe, the upper end of the lock sleeve is provided with the elastic claw, the latch at the upper end of the elastic claw is clamped on the central pipe, when the latch on the elastic claw is clamped with the central pipe, the upper joint and the outer sleeve are connected with the central pipe into a whole through the lock sleeve and the latch on the elastic claw on the lock sleeve, and when the elastic claw elastically displaces outwards under the action of external force and is separated from the central pipe, the upper joint, the outer sleeve and the lock sleeve can axially move relative to the central pipe, the upper end of the upper joint is connected with the central pipe column above, the lower end of the central pipe is connected with, therefore, the packer in the oil well is also positioned in two areas, the central pipe column is lifted when the packer needs to be unpacked, the packer positioned on the upper part of the unpacking device can be unpacked, the packer positioned on the lower part of the unpacking device is kept in the original position temporarily without being in the unpacking operation process because the central pipe can not move along with the upper joint, the unpacking can be carried out after the unpacking of the upper packer is finished, the unpacking load is reduced accordingly, and the unpacking power is reduced accordingly.

And because the piston is arranged below the annular cavity between the outer sleeve and the central pipe, the lower end of the piston is clamped between the elastic claw and the outer sleeve, the pipe wall of the central pipe is provided with a central pipe liquid inlet hole which is positioned between the limiting sleeve and the piston, the pipe wall of the outer sleeve is provided with an outer sleeve liquid inlet hole which is positioned between the piston and the locking sleeve, the lower end of the arranged piston is clamped between the elastic claw and the outer sleeve to limit the elastic claw from expanding outwards after being subjected to axial force, the piston is positioned at the position before descending, under the normal working state of the underground, the pressure in the oil pipe acts on the upper end of the piston through the central pipe liquid inlet hole and also maintains the piston at the position, and when the piston needs to be unpacked, the pressure is pressurized from the annular space outside the oil pipe, the pressure enters the annular cavity between the outer sleeve and the central pipe from the outer sleeve liquid inlet hole and acts on the lower end face of the piston to, the lower extreme of piston will separate with the elasticity jack catch, lift the center tube post this moment, through the top connection, outer tube pulling lock sleeve, because the restriction of elasticity jack catch lost the piston lower extreme, the elasticity jack catch will produce elastic deformation and flare under the effect of axial tension, make latch and center tube separation on it, the lock sleeve can go upward, and the center tube does not have axial displacement this moment, that is to say, the center tube post of this deblocking device top connection and the packer on the upper portion of being connected goes upward and makes the packer obtain the deblocking, and the center tube post of this deblocking device center tube and the packer that the lower part is connected does not go upward, therefore corresponding packer does not obtain the deblocking.

The upper part in the annular cavity between the outer sleeve and the central pipe is provided with the limiting sleeve, the limiting sleeve is connected with the outer sleeve through a sealing device, the limiting sleeve is fixedly connected with the central pipe through the sealing device, the central pipe and the outer sleeve are connected into a whole through the shear pin by the limiting sleeve, the structural stability of the initial state of the deblocking device is further ensured, the shear pin is sheared when the upper lifting central pipe column is deblocked, so that the outer sleeve and the central pipe can axially displace, the sealing devices between the limiting sleeve, the outer sleeve and the central pipe ensure that the central pipe and the outer pipe cannot be communicated, and the normal oil production activity of the oil well is not influenced; after each packer on the upper part of the upper joint is unsealed, the central pipe column is continuously lifted to drive the limiting sleeve to move upwards with the central pipe through the upper joint, the outer sleeve, the locking sleeve and the piston, so that the central pipe drives the central pipe columns of the packers on the lower part connected with the central pipe to move upwards for deblocking operation, and smooth deblocking operation of all the packers in the whole oil well is ensured.

The utility model discloses a preferred embodiment, the latch card of elasticity jack catch upper end is inserted on the outer circumference of the circular bead section on the center tube, lock sleeve hole upper segment is equipped with the step hole that corresponds with circular bead section on the center tube. By adopting the embodiment, the step hole end surface of the inner hole of the lock sleeve is opposite to the end surface of the shoulder section on the central pipe, when the limiting sleeve and the central pipe are driven to move upwards by the upper joint, the outer sleeve, the lock sleeve and the piston in the process of continuously lifting the central pipe column after the packers on the upper part of the upper joint are unsealed, the step hole end surface of the inner hole of the lock sleeve is also attached to the end surface of the shoulder section on the central pipe and drives the central pipe to move upwards by the shoulder section, and therefore the packer on the lower part of the unsealing device is unsealed better.

The utility model discloses a another kind of preferred embodiment be equipped with the screw hole that is connected with the oil well tubular column on the top connection. By adopting the implementation mode, the packer can be ensured to be connected with the oil well pipe column on the upper part, so that the packer can be conveniently unpacked.

The utility model discloses a preferred embodiment still be equipped with the external screw thread that is connected with the oil well tubular column center tube lower extreme excircle. By adopting the embodiment, the oil well pipe column connection of the deblocking device and the lower part can be ensured, and the deblocking operation of the packer can be conveniently carried out.

The utility model discloses further preferred embodiment be equipped with on the outer circumference of center tube and keep off the ring, should keep off the ring and be located the lock sleeve below. By adopting the embodiment, the arranged baffle ring can limit the lock sleeve and ensure that the clamping teeth on the elastic clamping jaws are correctly clamped with the central tube.

The utility model discloses another further preferred embodiment, keep off the ring and connect firmly with the center tube soon. By adopting the embodiment, the baffle ring and the central pipe are arranged in a split manner, so that reliable connection between the baffle ring and the central pipe can be ensured.

In a further preferred embodiment of the present invention, the upper and lower ends of the outer sleeve are fixedly connected to the upper joint and the lock sleeve respectively. By adopting the embodiment, the outer sleeve is conveniently and reliably connected with the upper joint and the lock sleeve.

Drawings

The hydraulic deblocking device of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of an embodiment of the hydraulic deblocking device of the present invention;

in the figure: 1-upper joint, 2-threaded hole, 3-central pipe, 4-limiting sleeve, 5-shear pin, 6-central pipe liquid inlet hole, 7-outer sleeve, 8-piston, 9-latch, 10-shoulder section, 11-elastic claw, 12-outer sleeve liquid inlet hole, 13-step hole, 14-locking sleeve, 15-retaining ring and 16-external thread.

Detailed Description

In the hydraulic deblocking device shown in fig. 1, an upper joint 3 is a joint of the hydraulic deblocking device connected with an upper oil well pipe column, a threaded hole 2 connected with the upper oil well pipe column is arranged at the upper end of the upper joint 1, a central pipe 3 is connected in an inner hole at the lower end of the upper joint 1, the upper end of the central pipe 3 is hermetically and movably inserted in the upper joint 1 through a sealing ring arranged in the inner hole of the upper joint 1, and an external thread 16 connected with the hydraulic deblocking device and a lower oil well pipe column is arranged on the excircle at the lower end of the central pipe 3; an outer sleeve 7 is screwed and fixedly connected to the lower end of the upper connector 1 through threads, a lock sleeve 14 is screwed and fixedly connected to the lower end of the outer sleeve 7 through threads, an inner hole of the lock sleeve 14 is movably sleeved on the outer circle section of the central tube 3, elastic clamping claws 11 are arranged at the upper end of the lock sleeve 14, the number of the elastic clamping claws 11 can be 3-6, the elastic clamping claws 11 are uniformly distributed in the circumferential direction of the lock sleeve 14, clamping teeth 9 at the upper ends of the elastic clamping claws 11 are clamped in clamping grooves in the outer circumference of a shoulder section 10 on the central tube 3, step holes 13 corresponding to the shoulder section 10 on the central tube 3 are arranged at the upper section of the inner hole of the lock sleeve 14, and the bottom end face of the step holes 13; a limiting sleeve 4 is arranged above the annular cavity between the outer sleeve 7 and the central pipe 3, a sealing device is arranged between the limiting sleeve 4 and the outer sleeve 7 and is connected with the limiting sleeve through a shear pin 5, the sealing device is arranged between the limiting sleeve 4 and the central pipe 3 and is fixedly connected with the limiting sleeve in a screwing way, and the arranged sealing device is a sealing ring arranged on the inner side wall and the outer side wall of the limiting sleeve 4; a piston 8 is arranged below an annular cavity between the outer sleeve 7 and the central tube 3, the lower end of the piston 8 is clamped between the elastic clamping claws 11 and the outer sleeve 7, a central tube liquid inlet hole 6 is formed in the tube wall of the central tube 3, the central tube liquid inlet hole 6 is positioned between the limiting sleeve 4 and the piston 8 and close to the limiting sleeve 4, an outer sleeve liquid inlet hole 12 is formed in the tube wall of the outer sleeve 7, and the outer sleeve liquid inlet hole 12 is positioned between the piston 8 and the lock sleeve 14; and a baffle ring 15 is arranged on the outer circumference of the central tube 3, the baffle ring 15 is fixedly connected with the central tube 3 in a screwing way, and the baffle ring 15 is positioned below the lock sleeve 14 and is attached to the end face of the lock sleeve 14.

The above description has been presented only for the purpose of illustrating certain preferred embodiments of the invention, and it is not to be taken as a limitation on the invention, as many modifications and variations are possible. The number of resilient claws 11 may also be, as stated, not between 3 and 6, but 2 or more than 6. Therefore, any improvement and changes made on the basis of the basic principle of the present invention should be considered as falling within the protection scope of the present invention.

Claims

1. The utility model provides a hydraulic pressure deblocking device, includes top connection (1) and center tube (3), its characterized in that: the upper end of the central tube (3) is hermetically and movably inserted into the upper connector (1), the lower end of the upper connector (1) is connected with an outer sleeve (7), the lower end of the outer sleeve (7) is connected with a lock sleeve (14), an inner hole of the lock sleeve (14) is movably sleeved on the excircle of the central tube (3), the upper end of the lock sleeve (14) is provided with an elastic clamping jaw (11), and a clamping tooth (9) at the upper end of the elastic clamping jaw (11) is clamped on the central tube (3); a limiting sleeve (4) is arranged above the annular cavity between the outer sleeve (7) and the central pipe (3), a sealing device is arranged between the limiting sleeve (4) and the outer sleeve (7) and is connected with the outer sleeve (7) through a shear pin (5), and the sealing device is arranged between the limiting sleeve (4) and the central pipe (3) and is fixedly connected with the central pipe; a piston (8) is arranged below an annular cavity between an outer sleeve (7) and a central pipe (3), the lower end of the piston (8) is clamped between an elastic clamping jaw (11) and the outer sleeve (7), a central pipe liquid inlet hole (6) is formed in the pipe wall of the central pipe (3), the central pipe liquid inlet hole (6) is located between a limiting sleeve (4) and the piston (8), an outer sleeve liquid inlet hole (12) is formed in the pipe wall of the outer sleeve (7), and the outer sleeve liquid inlet hole (12) is located between the piston (8) and a lock sleeve (14).

2. The hydraulic deblocking device of claim 1, wherein: the clamp teeth (9) at the upper end of the elastic clamping jaw (11) are clamped on the outer circumference of the shoulder section (10) on the central tube (3), and the upper section of the inner hole of the lock sleeve (14) is provided with a step hole (13) corresponding to the shoulder section (10) on the central tube (3).

3. The hydraulic deblocking device of claim 1, wherein: and the upper joint (1) is provided with a threaded hole (2) connected with the oil well pipe column.

4. The hydraulic deblocking device of claim 1, wherein: and an external thread (16) connected with the oil well pipe column is arranged on the excircle of the lower end of the central pipe (3).

5. The hydraulic deblocking device of claim 1, wherein: a baffle ring (15) is arranged on the outer circumference of the central tube (3), and the baffle ring (15) is positioned below the lock sleeve (14).

6. The hydraulic deblocking device of claim 5, wherein: the baffle ring (15) is fixedly connected with the central pipe (3) in a screwing way.

7. The hydraulic deblocking device of claim 1, wherein: the upper end and the lower end of the outer sleeve (7) are fixedly connected with the upper connector (1) and the lock sleeve (14) in a screwing mode respectively.