CN111058793A - Gradual unsealing device - Google Patents
Gradual unsealing device Download PDFInfo
- Publication number
- CN111058793A CN111058793A CN201811205933.9A CN201811205933A CN111058793A CN 111058793 A CN111058793 A CN 111058793A CN 201811205933 A CN201811205933 A CN 201811205933A CN 111058793 A CN111058793 A CN 111058793A
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- CN
- China
- Prior art keywords
- joint
- wall
- deblocking
- sliding
- packer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
Abstract
The invention discloses a step-by-step unsealing device which comprises a sliding joint and a lower joint, wherein the upper end of the lower joint extends into the sliding joint, and the outer wall of the upper end of the lower joint and the inner wall of the sliding joint are in a sliding sealing state. The lower port of the sliding joint is in threaded connection with a limiting sleeve, and the limiting sleeve is used for axially limiting the lower joint. There is a spacing platform on the lower clutch excircle, the stop collar inner wall is equipped with the spacing platform of second, and the terminal surface is spacing bench end axial spacing by the spacing platform of second under the first spacing platform. The sliding joint large aperture up end is the spacing platform of third, and the spacing platform of third is spacing to the lower clutch up end axial. The slip joint and the lower joint also transmit torque through the track pin and the track groove. The invention realizes the scheme that the deblocking force can be independently applied to the first-stage packer, achieves the purpose of stepwise deblocking of the packer, and solves the problem that the water injection pipe column with large deblocking force is easy to block.
Description
Technical Field
The invention relates to a deblocking technology of a compression packer, in particular to a gradual deblocking device of the packer.
Background
The Y341 compression packer for oilfield water injection is characterized in that the pipe column is matched with an oil pipe and the packer are connected into a whole, and the pipe column and the packer cannot move mutually, and are stressed simultaneously when being lifted or lowered. The deblocking mode of the Y341 compression packer is to lift or lower the pipe column for deblocking. The single-stage deblocking force reaches about 50 KN. When multistage compression packer establishes ties and uses, the deblocking power is single-stage deblocking power times the progression, because the deblocking power is big, oil pipe and packer are difficult to reciprocate during the operation, lead to the packer to be difficult to the deblocking, easily cause the tubular column to meet the card, need go up the overhaul operation, extension activity duration and increase working costs.
Application No.: 201510654356.1, published 2018-04-03 discloses a washable well step-by-step unset packer comprising: an upper joint; a well-flushing cylinder barrel; a spool shaft; a rubber cylinder; a central tube; a lock; a primary piston; connecting sleeves; and a lower joint. The invention has the advantages that: (1) the inlet of the well washing channel is of a plurality of slender slit structures, the flow area of the channel is large enough, large-particle solid-phase impurities can be prevented from entering and blocking the inner channel, and the smoothness of the well washing channel in the inner cavity of the tool is ensured; (2) the well washing channel of the packer is in a streamline design, so that impurities and solid-phase particles can easily flow out, and the channel is not easy to block due to stacking; (3) packer inside is equipped with deblocking mechanism step by step, and when multistage use, the earlier deblocking of higher level's packer carries out the packer deblocking of subordinate again, and deblocking power does not add up during the deblocking, guarantees that the packer deblocking is easy.
Application No.: 201510955430.3, published 2018-08-10 discloses a step-by-step deblocking washable well packer, which comprises a main body connecting mechanism, a well washing mechanism, a rubber sleeve sealing mechanism, a locking mechanism and a step-by-step deblocking mechanism, wherein the main body connecting mechanism comprises an upper joint, a central pipe, a lower section of the central pipe and a lower joint, the upper joint, the central pipe and the lower section of the central pipe are sequentially in threaded connection, and the lower joint is connected with the lower section of the central pipe through the step-by-step deblocking mechanism; the well washing mechanism comprises an outer pipe connector, a well washing valve and a wave spring; the rubber cylinder sealing mechanism comprises an outer central pipe, an upper sealing valve, a group of rubber cylinders, a control head, a short connecting outer cylinder, an upper piston and a lower piston; the locking mechanism comprises a lock sleeve, a lock spring core pipe, a connector, a self-locking valve and a connector. The invention has scientific and reasonable structural design, reliable setting force performance and simple and convenient deblocking operation, meets the step-by-step deblocking requirements of the oil field subdivision and multilayer division separated injection requirements, and is a step-by-step deblocking washable well packer with higher innovation.
Application No.: 201610142233.4, published Japanese 2017-11-17 discloses a slide-type step-by-step unsetting packer, wherein the outer wall of the lower part of an upper central tube is provided with a long slide, a short slide and a hook arm groove, the short slide is obliquely arranged and is communicated with the long slide to form a V shape, the hook arm groove is arranged beside the long slide and is communicated with the upper part of the long slide, the upper part of an unsetting hook barrel is provided with a hook arm, the top of the hook arm is inserted into the hook arm groove, the end part of a slide pin is arranged in the short slide in the long slide and the short slide and can slide in the long slide and the short slide, and the slide pin can drive the hook arm to slide together in the long slide. The packer unlocking device adopts the fixed pin for hanging and utilizing the slide way for unlocking, has low unlocking tension, adopts a step-by-step unlocking mode when unlocking a plurality of packers, and thoroughly solves the problems that the pin needs to be cut off when the packer is unlocked, the unlocking tension is large, and the plurality of packers are not convenient to unlock.
Application No.: 201720841743.0, published Japanese application 2018-01-23 discloses a step-by-step deblocking packer with low deblocking load, which comprises an upper joint, an inner central tube, an outer central tube and a lower joint, wherein a rubber cylinder component is sleeved on the upper end of the outer central tube, a locking mechanism is arranged on the outer surface of the lower end of the inner central tube and connected with the lower end of the outer central tube, a setting piston component is sleeved outside the locking mechanism and abuts against the lower end of the rubber cylinder component, a deblocking mechanism is arranged between the locking mechanism and the inner central tube, and the inner central tube and the outer central tube are connected by a tooth-embedded structure at the end part of the upper joint. The multi-stage packer has the advantages that the deblocking force of the single-stage packer can be greatly reduced, the locking balls are released in a grading manner when the pipe column is lifted up by adjusting the distance between the lower end face of the deblocking slider and the end face of the inner hole of the lower connector, the multi-stage packer pipe column is deblocked step by step, the underground deblocking reliability of the packer is improved, and the underground operation risk is reduced.
Application No.: 201520378797.9, published on 2015-10-21. The packer comprises a packer and a deblocking device, wherein the deblocking device comprises an upper joint, a deblocking pin, a control piston, a locking block, a central pipe and a lower joint, wherein the upper part and the lower part of the central pipe are respectively connected with the upper joint and the lower joint; the control piston is arranged in a cavity formed by the outer pipe and the central pipe, is connected with the outer pipe through the unsealing pin, and is provided with the locking block at the upper end. The packer is a conventional packer which is sealed without a unsealing pin. The deblocking device is a hydraulic step-by-step deblocking device provided with a deblocking mechanism. This combination formula deblocking packer step by step is connected a fluid pressure type deblocking ware step by step between the packer and is made the whole string deblocking of packer become single deblocking step by step to atress mode when having changed the packer deblocking makes the use of establishing ties of a plurality of packers, has reduced the deblocking load greatly, and safe and reliable can use in a large number in oil field water injection oil recovery field.
Application No.: 201721612187.6, published 2018-05-29 discloses a step-by-step unsetting packer comprising an upper joint and a central tube which are in non-threaded connection, the upper joint, an upper outer sleeve and a central outer sleeve are all in threaded connection and form an upper annular cavity with the central tube, an upper piston is in threaded connection with the central tube in the upper annular cavity and is fixed on the upper part of the outer sleeve by a unsetting shear pin to play a balance role during pressing, a well washing piston is formed by the upper part of the well washing piston, the lower part of the well washing piston and a framework sealing ring and is arranged in the upper annular cavity to play a balance, well washing and sealing roles, an upper balance cylinder is arranged between the lower part of the upper outer sleeve and the outer central tube to play a role in balancing the upper pressure and the pressure of a rubber cylinder to prevent accidental unsetting, the tool can bear the load by the unsetting pin, the central tube and the upper joint are in releasable connection, and adopts a balance structure of, the multi-stage step-by-step deblocking purpose can be achieved during deblocking, the working efficiency is greatly improved, and the labor intensity of workers is reduced.
Application No.: 201611113252.0, published as 2018-06-12 discloses a layered process pipe column step-by-step deblocking and unfreezing device, belonging to the technical field of oil and gas production engineering. This layering technology tubular column deblocking unfreezes device step by step sets up between two adjacent packers of layering technology tubular column fixedly, and it includes: the device comprises an upper joint, an outer sleeve, a central pipe, a stop cap, a sliding pin and a grading shearing part. According to the invention, the upper end of the outer sleeve is connected with the central pipe through the grading shearing part, and after the grading shearing part is sheared, the upper joint can drive the outer sleeve to move relative to the central pipe to provide a stroke for unsealing the packer above the packer, so that all packers of the layering process pipe column are prevented from being unsealed at the same time, the force required for lifting the fishing tool to extract the layering process pipe column is reduced, the difficulty in extracting the layering process pipe column is reduced, and the possibility of overhaul of an oil-water well is reduced.
Application No.: 201420367522.0, published Japanese 2014-12-31 discloses a small-diameter packer capable of washing and gradually unsealing, a positioning sleeve (18) is arranged between the lower end of a sealing piston (2) and a connecting sleeve (7), a fixing ring (20) sleeved outside the connecting sleeve (7) is arranged below an upper working barrel (3) and a lower well washing piston (6), and a pressure-bearing piston (21) which is slidably sleeved in the fixing ring (20) and slidably sleeved outside the connecting sleeve (7) is arranged above a baffle disc (8). The diameter of the packer is smaller, the packer is suitable for casing deformation wells, and the unpacking cost and the unpacking difficulty are lower. Because the diameter is smaller, the sleeve deformation cannot be influenced. And the step-by-step unsealing mode is adopted for unsealing, so that the force for lifting during unsealing is smaller, and the unsealing is easier. The unsealing can be realized without using a large-tonnage crane, and the operation is more convenient. The sealing device has the advantages of reliable sealing, practicability, simplicity, small unsealing force, convenience in operation, compact structure, reasonable layout, long service life of the rubber cylinder, capability of washing a well and convenience in use.
Application No.: 201320419084.3, published 2013-12-04, which is a retractable packer capable of being unpacked step by step, and mainly solves the problems that the packer is not unpacked and a pipe column is pulled out when the existing packer works. The method is characterized in that: the lower joint is in threaded connection with the lower central pipe, and a seat seal piston is arranged in the lower joint; the upper end of the seat seal piston is provided with a clamp spring sleeve, and a clamp spring and a seat seal pin are sequentially arranged inside the clamp spring sleeve; the top end of the lower joint is fixedly connected with a rubber cylinder seat and a rubber cylinder; the well washing device is characterized in that a powerful retraction mechanism and a step-by-step deblocking mechanism are sequentially arranged between the rubber cylinder and an upper central pipe inside the rubber cylinder, a blocking head is fixedly connected to the upper end of the rubber cylinder and connected with the well washing piston, a well washing inlet is arranged at a position corresponding to the inside of the well washing piston, an outer working sleeve is sleeved outside the well washing piston, a balance cavity is arranged in the outer working sleeve, and an external thread is connected with an upper connector. After the device is applied, the multi-layer water injection well can be unsealed step by step, the lifting load is reduced, and the problem that the multi-layer water injection well is difficult to seal by pulling can be fundamentally solved.
Disclosure of Invention
The invention aims to provide a step-by-step unsealing device, which is characterized in that a pipe column between two packers is changed into two bodies capable of sliding relatively from the original integral body, so that the scheme that unsealing force can be independently applied to a one-step packer is realized, the purpose of gradually unsealing the packers is achieved, and the problem that the water injection pipe column with large unsealing force is easy to block is solved.
In order to achieve the purpose, the invention adopts the following technical scheme that the gradual sealing device comprises a sliding joint and a lower joint, wherein the upper end of the lower joint extends into the sliding joint, and the outer wall of the upper end of the lower joint and the inner wall of the sliding joint are in a sliding sealing state.
And a limiting sleeve is arranged at the lower port of the sliding joint and axially limits the lower joint.
The port under the sliding joint is connected to the stop collar thread formula, first spacing platform is seted up to the lower clutch outer wall, the spacing platform of second is seted up to the stop collar inner wall, and the terminal surface is axially spacing in the face of the spacing bench end of second under the first spacing platform.
And a third limiting table is arranged on the inner wall of the sliding joint, and the lower end face of the third limiting table is axially limited relative to the upper end face of the lower joint.
Still including fixed cover, track pin, track groove, stop collar, fixed cover, track pin, track groove constitute moment of torsion conduction mechanism together, fixed cover is connected to stop collar lower extreme screw thread formula, fixed cover inner wall and stop collar lower part installation track pin, and the track pin slides in the axial track inslot that the lower clutch outer wall was seted up.
The upper port of the sliding joint is provided with a threaded connector, and the lower port of the lower joint is provided with a threaded connector.
The outer wall of the upper end of the lower connector is provided with a sealing groove, a sealing ring is arranged in the sealing groove, and the sealing ring seals the outer wall of the upper end of the lower connector and the inner wall of the sliding connector.
Compared with the prior art, the invention has the following beneficial effects:
the invention designs a stepwise deblocking device of a water injection Y341 compression packer, which is arranged below the packer, so that each stage of packer has an independent downward space, deblocking force can be independently acted on each stage of packer to implement independent deblocking, the stepwise deblocking device is not influenced by the stage number of the packer, and the problem that a water injection pipe column with large deblocking force is easy to block is effectively solved.
Drawings
Fig. 1 is a structural sectional view of a progressive decapsulation apparatus according to the present invention.
In the figure: the device comprises a sliding joint 1, a limiting sleeve 2, a sealing ring 3, a fixing sleeve 4, a track pin 5, a track groove 6 and a lower joint 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the gradual unsealing device comprises a sliding joint 1 and a lower joint 7, wherein the upper end of the lower joint extends into the sliding joint, and the outer wall of the upper end of the lower joint and the inner wall of the sliding joint are in a sliding sealing state. The outer wall of the upper end of the lower connector is provided with a sealing groove, a sealing ring 3 is arranged in the sealing groove, and the sealing ring seals the outer wall of the upper end of the lower connector and the inner wall of the sliding connector.
And a lower port of the sliding joint is provided with a limiting sleeve 2, and the limiting sleeve is used for axially limiting the lower joint.
The port under the sliding joint is connected to the stop collar thread formula, first spacing platform is seted up to the lower clutch outer wall, the spacing platform of second is seted up to the stop collar inner wall, and terminal surface is by under the first spacing platform, to the spacing bench end of second axial spacing.
And a third limiting table is arranged on the inner wall of the sliding joint, and the lower end face of the third limiting table is axially limited relative to the upper end face of the lower joint.
The torque conduction mechanism comprises a limiting sleeve 2, a fixing sleeve 4, a track pin 5 and a track groove 6, wherein the lower end of the limiting sleeve is in threaded connection with the fixing sleeve 4, the inner wall of the fixing sleeve and the lower part of the limiting sleeve are provided with the track pin 5, and the track pin slides in the axial track groove 6 formed in the outer wall of the lower connector.
The upper port of the sliding joint is provided with a threaded connector, and the lower port of the lower joint is provided with a threaded connector.
The upper end of the lower joint 7 is inserted into an inner hole of the sliding joint 1 and sealed through an O-shaped sealing ring 3, the limiting sleeve 2 is sleeved on a small-diameter excircle of the lower joint 7, an internal thread of the upper end of the limiting sleeve is connected with an external thread of the lower end of the sliding joint 7, the track pin 5 is installed in a radial hole of the lower end of the limiting sleeve 2 and an axial groove 6 of the lower joint 7, and an internal thread of the fixing sleeve 4 is connected with an external thread of the lower end of the limiting sleeve 2.
The specific implementation method comprises the following steps: when the lower connector 7 is placed downwards for unsealing, the lower connector 7 is still, the sliding connector 1 moves downwards to drive the limiting sleeve 2, the fixing sleeve 4 and the track pin 5 to synchronously move downwards along the track groove 6, and the sealing ring 3 performs internal and external sealing.
The invention designs a step-by-step deblocking device of a water injection Y341 compression packer, which is arranged below the packer, so that each step of packer has an independent downward space, deblocking force can be independently acted on each step of packer to implement independent deblocking, the step-by-step deblocking is not influenced by the step number of the packer, and the problem that a water injection pipe column with large deblocking force is easy to block is effectively solved.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The gradual unsealing device is characterized by comprising a sliding joint and a lower joint, wherein the upper end of the lower joint extends into the sliding joint, and the outer wall of the upper end of the lower joint and the inner wall of the sliding joint are in a sliding sealing state.
2. The progressive unsealing device of claim 1, wherein a stop collar is mounted at the lower port of the slip joint, and the stop collar axially limits the lower joint.
3. The progressive sealing device according to claim 2, wherein the stop collar is screwed on the lower end of the sliding joint, the outer wall of the lower joint is provided with a first stop, the inner wall of the stop collar is provided with a second stop, and the lower end of the first stop is axially limited facing the upper end of the second stop.
4. A progressive unsealing device according to claim 1, 2 or 3, wherein the inner wall of the sliding joint is provided with a third limiting table, and the lower end surface of the third limiting table is axially limited against the upper end surface of the lower joint.
5. The gradual unsealing device of claim 2 or 3, further comprising a fixed sleeve, a track pin and a track groove, wherein the limit sleeve, the fixed sleeve, the track pin and the track groove together form a torque transmission mechanism, the fixed sleeve is connected with the lower end of the limit sleeve in a threaded manner, the track pin is installed on the inner wall of the fixed sleeve and the lower part of the limit sleeve, and the track pin slides in the axial track groove formed on the outer wall of the lower joint.
6. A progressive decapsulation apparatus according to claim 1, 2 or 3, wherein the upper port of the sliding joint is provided with a threaded interface, and the lower port of the lower joint is provided with a threaded interface.
7. The gradual unsealing device of claim 1, 2 or 3, wherein the outer wall of the upper end of the lower joint is provided with a sealing groove, a sealing ring is arranged in the sealing groove, and the sealing ring seals the outer wall of the upper end of the lower joint and the inner wall of the sliding joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811205933.9A CN111058793A (en) | 2018-10-16 | 2018-10-16 | Gradual unsealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811205933.9A CN111058793A (en) | 2018-10-16 | 2018-10-16 | Gradual unsealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111058793A true CN111058793A (en) | 2020-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811205933.9A Pending CN111058793A (en) | 2018-10-16 | 2018-10-16 | Gradual unsealing device |
Country Status (1)
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| CN (1) | CN111058793A (en) |
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