CN114086910B - A kind of double unpacking packer for well cleaning, unsealing, lifting and unsealing - Google Patents
A kind of double unpacking packer for well cleaning, unsealing, lifting and unsealing Download PDFInfo
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- CN114086910B CN114086910B CN202010861533.4A CN202010861533A CN114086910B CN 114086910 B CN114086910 B CN 114086910B CN 202010861533 A CN202010861533 A CN 202010861533A CN 114086910 B CN114086910 B CN 114086910B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The application discloses a double-deblocking packer for well flushing deblocking and lifting deblocking, which comprises a central pipe (2), wherein an upper cylinder sleeve (5), a rubber cylinder (14) and a valve core (6) are arranged outside the central pipe (2), an annular valve port (601) is formed between the upper cylinder sleeve (5) and the valve core (6), and an annular lower expansion cavity (1401) can be formed between the rubber cylinder (14) and the central pipe (2); in the process that the pressure liquid enters the filter sleeve (3), the pressure liquid can enable the annular valve port (601) to be in an opening state; in the process of upward movement of the central tube (2), the annular valve port (601) can be in an open state; when the annular valve port (601) is in an open state, the annular lower expansion chamber (1401) is communicated with the upper through hole (201) through the annular valve port (601). The double-deblocking packer for well flushing deblocking up-lifting deblocking can realize deblocking by well flushing deblocking or up-lifting deblocking, thereby improving water drive efficiency and avoiding major repair of an oil well.
Description
Technical Field
The application relates to the field of petroleum exploitation equipment, in particular to a double-deblocking packer for lifting and deblocking during well flushing deblocking.
Background
In order to improve the water well separate injection effect, the sealing quality of the packer is critical, the underground packer is not tight, the water well loses the meaning of separate injection, the currently used packer has the defects of large setting pressure difference, high deblocking tension and the like, and due to the fact that a deblocking mechanism is not designed, a certain oil well clamping pipe column cannot be lifted, oil well overhaul is finally caused, and the adoption efficiency is greatly reduced.
Disclosure of Invention
In order to solve the problem of difficult deblocking of a packer, the application provides a double deblocking packer for lifting and deblocking in well flushing and deblocking.
The technical scheme adopted for solving the technical problems is as follows: the double-deblocking packer comprises a central pipe, wherein a filtering sleeve, an upper cylinder sleeve, an upper steel bowl, a rubber cylinder and a lower steel bowl which are sequentially connected from top to bottom are sleeved outside the central pipe; in the process that the pressure liquid outside the filter sleeve enters the filter sleeve through the filter through hole, the pressure liquid can push the deblocking piston to move downwards and enable the annular valve port to be in an open state; in the process of upward movement of the central tube, the filter sleeve and the upper cylinder sleeve both move upward along with the central tube, so that the annular valve port is in an open state; when the annular valve port is in an open state, the annular lower expansion cavity is communicated with the upper through hole through the annular valve port.
The upper end of the central tube and the upper end of the filter sleeve are fixedly connected through an upper joint in a sealing way, an annular upper hydraulic cavity is formed between the filter sleeve and the central tube, the annular upper hydraulic cavity and the unsealing piston are arranged up and down, and the filter through hole is communicated with the annular upper hydraulic cavity.
An annular upper cavity is formed between the deblocking piston and the valve core, and the upper through hole, the annular upper cavity and the annular valve port are sequentially communicated.
The upper end of the valve core is sleeved with a sealing valve ring, the valve core can be in sealing connection with the upper cylinder sleeve through the sealing valve ring, the valve core is in sealing connection with the central tube, the lower end of the valve core is connected with the upper steel bowl through a spring, and the spring is in a compressed state.
The spring inner sleeve is provided with a sealing sleeve, a strip-shaped groove is arranged in the upper part of the side wall of the sealing sleeve, the length direction of the strip-shaped groove is parallel to the axis direction of the central tube, the upper end of the sealing sleeve is sleeved in the lower end of the valve core, the lower end of the valve core is connected with a slotted countersunk head screw, the tail end of the slotted countersunk head screw is positioned in the strip-shaped groove, and the lower end of the sealing sleeve is fixedly connected with the upper steel bowl.
The inner sleeve of the sealing sleeve is provided with a lifting ring, the upper end of the lifting ring is connected with the sealing sleeve in a clamping manner, the lower end of the lifting ring is fixedly connected with the upper steel bowl, a long-strip-shaped through hole is arranged in the side wall of the lifting ring, the length direction of the long-strip-shaped through hole is parallel to the axis direction of the central tube, a locking block is fixed outside the central tube, and the locking block is positioned in the long-strip-shaped through hole.
The middle part of the side wall of the sealing sleeve is internally provided with a through-flow hole, an annular gap is arranged between the lifting ring and the central tube, and the through-flow hole, the strip-shaped through hole and the annular gap are communicated in sequence.
The upper cylinder sleeve is connected with the upper steel bowl through a deblocking pin, and a sealing ring is arranged between the upper cylinder sleeve and the upper steel bowl.
An upper vulcanized cylinder sleeve is sleeved in the upper end of the rubber cylinder, the upper end of the upper vulcanized cylinder sleeve is fixedly connected with the upper cylinder sleeve, the upper vulcanized cylinder sleeve is sleeved outside the central tube, and the inner diameter of the upper vulcanized cylinder sleeve is larger than the outer diameter of the central tube.
The lower end of the lower steel bowl is connected with a lower joint, the lower joint is fixedly connected with the central tube in a sealing way, the lower steel bowl and the lower joint are sleeved outside the central tube, an annular lower hydraulic cavity is formed between the lower steel bowl and the central tube, a lower through hole is formed in the lower portion of the side wall of the central tube, and the lower through hole is communicated with the annular lower hydraulic cavity.
The beneficial effects of the application are as follows: when the water is injected in a separated layer, the well-flushing and deblocking double-deblocking packer can be used for flushing and deblocking, and when the oil extraction operation is carried out, the well-flushing and Jie Fengshang double-deblocking packer can be used for lifting and deblocking (even lifting and forced deblocking) to restore the rubber cylinder to the original state, so that the phenomenon of pipe column clamping cannot occur.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
FIG. 1 is a schematic illustration of a dual unset packer of the present application with a well wash Jie Fengshang unset.
Fig. 2 is a schematic view of the first segment from top to bottom in fig. 1.
Fig. 3 is a schematic view of the second section from top to bottom in fig. 1.
Fig. 4 is a schematic view of the third section from top to bottom in fig. 1.
Fig. 5 is a schematic view of the fourth segment from top to bottom in fig. 1.
Fig. 6 is a schematic view of the fifth section from top to bottom in fig. 1.
1. An upper joint; 2. a central tube; 3. a filter sleeve; 4. deblocking the piston; 5. a cylinder sleeve is arranged; 6. a valve core; 7. slotted countersunk head screws; 8. deblocking the envelope; 9. a spring; 10. a locking piece; 11. a pull ring is lifted; 12. a steel bowl is arranged; 13. deblocking the pin; 14. a rubber cylinder; 15. a steel bowl is arranged; 16. a lower joint; 17. a seal ring; 18. a vulcanized cylinder sleeve is arranged on the cylinder sleeve; 19. a lower vulcanized cylinder sleeve;
201. an upper through hole; 202. a lower through hole;
301. a filtering through hole; 302. an upper hydraulic chamber;
501. an annular upper cavity;
601. an annular valve port; 602. sealing the valve ring;
801. a strip-shaped groove; 802. a through-flow hole;
1101. a long-strip-shaped through hole; 1102. a first annular gap;
1401. an annular lower expansion chamber;
1501. an annular lower hydraulic chamber.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The double-deblocking packer comprises a vertical central pipe 2, wherein a filtering sleeve 3, an upper cylinder sleeve 5, an upper steel bowl 12, a rubber cylinder 14 and a lower steel bowl 15 which are sequentially connected from top to bottom are sleeved outside the central pipe 2, the filtering sleeve 3 and the upper cylinder sleeve 5 are fixed relative to the central pipe 2, an annular lower expansion cavity 1401 can be formed between the rubber cylinder 14 and the central pipe 2, a deblocking piston 4 and a valve core 6 which are arranged up and down are sleeved between the upper cylinder sleeve 5 and the central pipe 2, a filtering through hole 301 is formed in the side wall of the filtering sleeve 3, an annular valve port 601 is formed between the upper cylinder sleeve 5 and the valve core 6, and an upper through hole 201 is formed in the upper part of the side wall of the central pipe 2; in the process that the pressure liquid outside the filter sleeve 3 enters the filter sleeve 3 through the filter through hole 301, the pressure liquid can push the deblocking piston 4 to move downwards and enable the annular valve port 601 to be in an open state; in the process of moving the central tube 2 upwards, the filter sleeve 3 and the upper cylinder sleeve 5 both move upwards along with the central tube 2, so that the annular valve port 601 is in an open state; when the annular valve port 601 is in an open state, the annular lower expansion chamber 1401 communicates with the upper through-hole 201 through the annular valve port 601, as shown in fig. 1 to 6.
In this embodiment, the upper end of the central tube 2 and the upper end of the filter sleeve 3 are connected and fixed in a sealing manner through the upper joint 1, an annular upper hydraulic cavity 302 is formed between the filter sleeve 3 and the central tube 2, the annular upper hydraulic cavity 302 is arranged up and down with the deblocking piston 4, and the filter through hole 301 is communicated with the annular upper hydraulic cavity 302.
The upper end of the central tube 2 is in threaded connection with the upper joint 1, the upper end of the filter sleeve 3 is in threaded connection with the upper joint 1, a sealing ring 17 is arranged between the unsealing piston 4 and the central tube 2, and a sealing ring 17 is also arranged between the unsealing piston 4 and the upper cylinder sleeve 5.
The valve consisting of the valve core 6 and the upper cylinder sleeve 5 is normally in a closed state, namely the annular valve port 601 is in a closed state, the valve core 6 is in sealing connection with the upper cylinder sleeve 5, the upper end and the lower end of the annular valve port 601 cannot be communicated, and fluid cannot pass through the annular valve port 601.
In the process that the pressure liquid outside the filter sleeve 3 enters the filter sleeve 3 through the filter through hole 301, the pressure liquid expands the annular upper hydraulic cavity 302 to push the deblocking piston 4 to move downwards, after the deblocking piston 4 contacts with the valve core 6, the deblocking piston 4 drives the valve core 6 to move downwards synchronously, the valve core 6 is not connected with the upper cylinder sleeve 5 in a sealing way, and the upper end and the lower end of the annular valve port 601 are communicated, so that a valve consisting of the valve core 6 and the upper cylinder sleeve 5 is also in an open state.
An annular upper cavity 501 is formed between the deblocking piston 4 and the valve core 6, the annular upper cavity 501 is sleeved between the upper cylinder sleeve 5 and the central tube 2, and the upper through hole 201, the annular upper cavity 501 and the annular valve port 601 are sequentially communicated. The deblocking piston 4 comprises a sealing section and a working cylinder section which are connected up and down, the inner surface of the working cylinder section of the deblocking piston 4 is in sealing connection with the central pipe 2, the outer surface of the working cylinder section of the deblocking piston 4 is in sealing connection with the upper cylinder sleeve 5, and a through hole is arranged in the side wall of the working cylinder section of the deblocking piston 4.
In this embodiment, a sealing valve ring 602 is sleeved on the upper end of the valve core 6, the valve core 6 can be in sealing connection with the upper cylinder sleeve 5 through the sealing valve ring 602, the valve core 6 is in sealing connection with the central tube 2, the lower end of the valve core 6 is connected with the upper steel bowl 12 through a spring 9, and the spring 9 is in a compressed state, so that the valve core 6 and the upper cylinder sleeve 5 are in a sealing connection state.
The upper end of the valve core 6 is conical, a sealing valve ring 602 is fixed at the upper end of the valve core 6, a sealing ring 17 is arranged between the valve core 6 and the central tube 2, the upper end and the lower end of a spring 9 are respectively abutted with the valve core 6 and an upper steel bowl 12, and the spring 9 is sleeved between the upper cylinder sleeve 5 and the central tube 2.
In the embodiment, a deblocking sleeve 8 is sleeved in the spring 9, a strip-shaped groove 801 is arranged in the upper portion of the side wall of the deblocking sleeve 8, the length direction of the strip-shaped groove 801 is parallel to the axis direction of the central tube 2, the upper end of the deblocking sleeve 8 is sleeved in the lower end of the valve core 6, the lower end of the valve core 6 is connected with a slotted countersunk head screw 7, the tail end of the slotted countersunk head screw 7 is positioned in the strip-shaped groove 801, and the lower end of the deblocking sleeve 8 is fixedly connected with an upper steel bowl 12 through threads.
The slotted countersunk head screw 7 is fixedly connected with the valve core 6 through threads, the inner surface of the deblocking sleeve 8 comprises a small-diameter section and a large-diameter section which are connected up and down, the strip-shaped groove 801 is positioned in the small-diameter section of the deblocking sleeve 8, the deblocking sleeve 8 can move up and down relative to the valve core 6, and the slotted countersunk head screw 7 is matched with the strip-shaped groove 801 to limit the up and down movement range of the deblocking sleeve 8 relative to the valve core 6.
In the embodiment, a lifting ring 11 is sleeved in the sealing sleeve 8, the upper end of the lifting ring 11 is clamped with the sealing sleeve 8, the lower end of the lifting ring 11 is fixedly connected with an upper steel bowl 12 in a threaded manner, a long-strip-shaped through hole 1101 is formed in the side wall of the lifting ring 11, the length direction of the long-strip-shaped through hole 1101 is parallel to the axis direction of the central tube 2, a locking block 10 is fixedly arranged outside the central tube 2, and the locking block 10 is positioned in the long-strip-shaped through hole 1101.
The upper cylinder sleeve 5, the spring 9, the deblocking sleeve 8, the lifting ring 11 and the central tube 2 are sequentially sleeved from outside to inside, the locking block 10 is of a cube structure, the locking block 10 is fixedly inserted on the outer surface of the central tube 2, the lifting ring 11 is sleeved in a large-diameter section of the deblocking sleeve 8, the outer diameter of the lifting ring 11 is equal to the inner diameter of the large-diameter section of the deblocking sleeve 8, the inner diameter of the lifting ring 11 is equal to the inner diameter of a small-diameter section of the deblocking sleeve 8, and the small-diameter Duan Yudi of the deblocking sleeve 8 is arranged up and down.
The central tube 2 can move up and down relative to the lifting ring 11, and the locking block 10 is matched with the strip-shaped through hole 1101 to limit the up and down movement range of the central tube 2 relative to the lifting ring 11. A first annular gap 1102 is arranged between the lifting ring 11 and the central tube 2, and a second annular gap is arranged between the small diameter section of the deblocking sleeve 8 and the central tube 2.
The middle part of the side wall of the sealing sleeve 8 is provided with a through-flow hole 802 which is arranged up and down, the through-flow hole 802 is positioned at the large-diameter section of the sealing sleeve 8, and the through-flow hole 802, the strip-shaped through hole 1101 and the annular gap are communicated in sequence. The axis of the upper cylinder sleeve 5, the axis of the valve core 6, the axis of the deblocking sleeve 8, the axis of the spring 9, the axis of the pull ring 11 and the axis of the central tube 2 coincide.
In this embodiment, the upper end of the upper steel bowl 12 is sleeved in the lower end of the upper cylinder sleeve 5, the upper cylinder sleeve 5 is connected with the upper steel bowl 12 through a deblocking pin 13, a sealing ring is arranged between the upper cylinder sleeve 5 and the upper steel bowl 12, the lower end of the deblocking sleeve 8 is in threaded connection with the upper steel bowl 12, and the lower end of the lifting ring 11 is in threaded connection with the upper steel bowl 12.
In the embodiment, an upper vulcanized cylinder sleeve 18 is sleeved in the upper end of the rubber cylinder 14, the upper end of the upper vulcanized cylinder sleeve 18 is fixedly connected with the upper cylinder sleeve 5 in a threaded manner, the upper end of the rubber cylinder 14 is fixedly connected with the upper vulcanized cylinder sleeve 18, the lifting ring 11 and the upper vulcanized cylinder sleeve 18 are arranged up and down, the upper vulcanized cylinder sleeve 18 is sleeved outside the central tube 2, and the inner diameter of the upper vulcanized cylinder sleeve 18 is larger than the outer diameter of the central tube 2.
In this embodiment, the lower end of the lower steel bowl 15 is connected with a lower joint 16 in a sealing manner, the lower steel bowl 15 is connected with the central tube 2 in a sealing manner, a sealing ring 17 is arranged between the lower steel bowl 15 and the central tube 2, the lower joint 16 is fixedly connected with the central tube 2 in a sealing manner, the lower steel bowl 15 and the lower joint 16 are sleeved outside the central tube 2, an annular lower hydraulic chamber 1501 is formed between the lower steel bowl 15 and the central tube 2, a lower through hole 202 is arranged at the lower part of the side wall of the central tube 2, and the lower through hole 202 is communicated with the annular lower hydraulic chamber 1501.
The lower end of the rubber cylinder 14 is internally sleeved with a lower vulcanization cylinder sleeve 19, the lower vulcanization cylinder sleeve 19 is sleeved outside the central tube 2, the lower vulcanization cylinder sleeve 19 is in threaded connection with the lower steel bowl 15, pressure liquid in the central tube 2 can enter the annular lower hydraulic cavity 1501 through the lower through hole 202, and the annular lower hydraulic cavity 1501 expands to enable the lower steel bowl 15 to move upwards, so that the rubber cylinder 14 radially expands to a seat sealing state.
In the present application, the upper joint 1 functions to connect the oil pipe. The central tube 2 is used for connecting the upper joint 1 and the lower joint 16, and the central tube 2 carries other components for setting and unsetting. The filter sleeve 3 is used for establishing a well flushing liquid inlet channel, and the filter through holes 301 can block sundries from entering. The deblocking piston 4 is used for sealing the well flushing channel, the well flushing hydraulic pressure pushes the well flushing channel to move downwards, and the valve is jacked to enable the packer to release pressure and deblock. The upper cylinder sleeve 5 is used for establishing a liquid inlet channel, which is equivalent to a valve seat, and the upper shearing deblocking pin 13 is moved upwards.
The valve core 6 has the functions of sealing liquid by liquid inlet seat, releasing pressure and unsealing by flushing. The slotted countersunk head screw 7 is used for limiting the moving distance of the valve, and after the valve is lifted for a certain distance, the valve is separated from the valve seat to release pressure and unseal. The deblocking sleeve 8 is used for limiting the moving distance of the slotted countersunk head screw, and is provided with a liquid inlet and a liquid outlet for sitting and deblocking. The spring 9 acts to bear against the valve seal and prevent leakage of liquid. The locking piece 10 is embedded on the central tube, the lifting pipe column is forced on the lifting ring after a certain distance, and the rubber cylinder 14 is forcibly pulled through the steel bowl.
The lifting tab 11 serves to limit the moving distance of the lock block 10. The upper steel bowl 12 is used for connecting a vulcanization cylinder sleeve of the rubber cylinder, pressing the vulcanization part of the rubber cylinder, and the lifting pipe column can forcedly pull the rubber cylinder to unseal. The function of the deblocking pin 13 is to limit the upper cylinder sleeve, and the lifting pipe column can deblock the rubber cylinder after shearing. The function of the expansion cement 14 is to seal the tubing and casing annulus after expansion. The lower steel bowl 15 is used for connecting the rubber cylinder vulcanizing cylinder sleeve, pressing the rubber cylinder vulcanizing part and moving up to compress the rubber cylinder when being pressed. The lower joint 16 serves to connect the tubing.
The working process of the double-deblocking packer for lifting and deblocking in well flushing deblocking is described below.
And assembling the double-deblocking packer for well flushing deblocking.
And (3) lowering the double-deblocking packer for lifting and deblocking the well flushing deblocking to a design position according to the design requirement of the pipe column.
And (3) magnetic positioning and depth correction are performed, and the pipe column is accurately adjusted to a qualified position.
The working process of setting:
and step 1, pressing the oil pipe of the pump truck by more than 15 MPa.
Step 2, the central tube 2 contains an axial through channel, and the pressure fluid enters the upper through hole 201 and the lower through hole 202 through the axial through channel of the central tube 2.
Pressure liquid enters the annular upper cavity 501 from the upper through hole 201, the valve core 6 is moved downwards by the pressure liquid, the annular valve port 601 is in an open state, the pressure liquid in the annular upper cavity 501 sequentially passes through the annular valve port 601, the through-flow hole 802, the strip-shaped through hole 1101 and the first annular gap 1102 to enter between the rubber cylinder 14 and the central tube 2, the rubber cylinder 14 is radially expanded after being pressed, an annular lower expansion cavity 1401 is formed between the rubber cylinder 14 and the central tube 2, the pressure liquid is filled in the annular lower expansion cavity 1401, the rubber cylinder 14 is in a seat sealing state, and an oil jacket annular space is sealed.
The pressure liquid enters the annular lower hydraulic cavity 1501 from the lower through hole 202 at the lower part of the central tube 2, the annular lower hydraulic cavity 1501 expands to enable the lower steel bowl 15 to move upwards, the rubber cylinder 14 is axially pressed and radially expanded, and the rubber cylinder can be prevented from being pulled and damaged when expanding.
And 3, stopping pressurizing the pump truck, and quickly sealing and connecting the valve core 6 with the upper cylinder sleeve 5 under the action of the elastic force of the spring 9 to enable the annular valve port 601 to be in a closed state, and storing pressure liquid in the rubber cylinder 14 in the annular lower expansion cavity 1401 to enable the rubber cylinder 14 to be locked in an expansion state without pressure release and unsealing.
The working process of flushing and unsealing comprises the following steps:
in the step 1, the oil sleeve annulus is pressurized, pressure liquid enters the upper hydraulic cavity 302 through the filtering through holes 301 on the filtering sleeve 3, and the pressure acts on the deblocking piston 4 to push the deblocking piston 4 to descend.
Step 2, after the deblocking piston 4 contacts with the valve core 6, the deblocking piston 4 pushes the valve core 6 to synchronously move downwards, so that an annular valve port 601 between the valve core 6 and an upper cylinder sleeve 5 is in an open state, pressure liquid stored in a rubber cylinder 14 passes through a first annular gap 1102, a strip-shaped through hole 1101, a through hole 802, the annular valve port 601 and an annular upper cavity 501 in sequence and then is instantaneously released into the central tube 2 from the upper through hole 201, and the rubber cylinder 14 is restored to the original state under the extrusion of the annular pressure of an oil sleeve and the action of the elastic force of the rubber cylinder, so that the packer is deblocked.
Lifting and deblocking working processes:
step 1, lifting the pipe column, wherein the upper joint 1 drives the central pipe 2, the locking block 10, the filtering sleeve 3 and the upper cylinder sleeve 5 to synchronously move upwards, the rubber cylinder 14 forms a large friction force with the sleeve after being sealed in an expanding mode, the upper steel bowl 12 is fixed in the original position, the upper steel bowl is also fixed in the original position, and the unsealing pin 13 is sheared under the action of the lifting force.
And 2, continuously lifting the pipe column, moving the valve core 6 upwards under the action of the elastic force of the spring 9, sealing and connecting the valve core 6 with the upper cylinder sleeve 5, and closing the annular valve port 601.
And 3, continuously lifting the pipe column, abutting against the upper end of the strip-shaped groove 801 after the slotted countersunk head screw 7 on the valve core 6 moves upwards for a certain distance, limiting the movement by the unsealing sleeve 8, enabling the valve core 6 not to move upwards any more, enabling the valve core 6 to leave the upper cylinder sleeve 5, enabling the valve core 6 to be in sealing connection with the upper cylinder sleeve 5, enabling the annular valve port 601 to be in an open state, enabling pressure liquid stored in the rubber cylinder 14 to pass through the first annular gap 1102, the strip-shaped through hole 1101, the through-flow hole 802, the annular valve port 601 and the annular upper cavity 501 in sequence, then instantly releasing the pressure liquid into the central pipe 2 from the upper through hole 201, enabling the rubber cylinder 14 to recover under the action of the extrusion of the annular pressure of the oil jacket and the elastic force of the rubber cylinder, and unsealing the packer.
And 4, continuing to lift the pipe column, after the locking piece 10 moves upwards for a certain distance in the strip-shaped through hole 1101 of the lifting ring 11, abutting the locking piece 10 with the upper end of the strip-shaped through hole 1101, and forcibly pulling the rubber cylinder 14 to restore and unseal through the lifting ring 11, the upper steel bowl 12 and the upper vulcanization cylinder sleeve 18 by the locking piece 10, wherein liquid in the rubber cylinder 14 is extruded out of the rubber cylinder. This step may be referred to as the process of lifting the forced decapsulation.
The working processes of flushing, unsealing, lifting and forced unsealing can select a proper unsealing mode according to the needs. For example, if the filtering through holes 301 on the filtering sleeve 3 are buried by sand, and well flushing and deblocking cannot be achieved, the lifting and deblocking can be selected, namely the lifting pipe column is lifted, the deblocking pin 13 is sheared off, the annular valve port 601 is opened for pressure relief, and the rubber cylinder 14 is forcibly pulled back for restoration and deblocking.
The foregoing description of the embodiments of the application is not intended to limit the scope of the application, so that the substitution of equivalent elements or equivalent variations and modifications within the scope of the application shall fall within the scope of the patent. In addition, the technical characteristics and technical characteristics, the technical characteristics and technical scheme and the technical scheme can be freely combined for use.
Claims (8)
1. The double-deblocking packer is characterized in that the double-deblocking packer for well flushing and deblocking by Jie Fengshang comprises a central pipe (2), a filtering sleeve (3), an upper cylinder sleeve (5), an upper steel bowl (12), a rubber cylinder (14) and a lower steel bowl (15) which are sequentially connected from top to bottom are sleeved outside the central pipe (2), the filtering sleeve (3) and the upper cylinder sleeve (5) are fixed relative to the central pipe (2), an annular lower expansion cavity (1401) can be formed between the rubber cylinder (14) and the central pipe (2), a deblocking piston (4) and a valve core (6) which are arranged up and down are sleeved between the upper cylinder sleeve (5) and the central pipe (2), a filtering through hole (301) is formed in the side wall of the filtering sleeve (3), an annular valve port (601) is formed between the upper cylinder sleeve (5) and the valve core (6), and an upper through hole (201) is formed in the upper part of the side wall of the central pipe (2).
The upper end of the valve core (6) is sleeved with a sealing valve ring (602), the valve core (6) can be connected with the upper cylinder sleeve (5) in a sealing way through the sealing valve ring (602), the valve core (6) is connected with the central tube (2) in a sealing way, the lower end of the valve core (6) is connected with the upper steel bowl (12) through a spring (9), and the spring (9) is in a compressed state;
the spring (9) is sleeved with a sealing sleeve (8), a strip-shaped groove (801) is formed in the upper portion of the side wall of the sealing sleeve (8), the length direction of the strip-shaped groove (801) is parallel to the axis direction of the central tube (2), the upper end of the sealing sleeve (8) is sleeved in the lower end of the valve core (6), the lower end of the valve core (6) is connected with a slotted countersunk head screw (7), the tail end of the slotted countersunk head screw (7) is positioned in the strip-shaped groove (801), and the lower end of the sealing sleeve (8) is fixedly connected with an upper steel bowl (12);
in the process that the pressure liquid outside the filter sleeve (3) enters the filter sleeve (3) through the filter through hole (301), the pressure liquid can push the deblocking piston (4) to move downwards and enable the annular valve port (601) to be in an open state;
in the process of upward movement of the central tube (2), the filter sleeve (3) and the upper cylinder sleeve (5) move upward along with the central tube (2), so that the annular valve port (601) is in an open state;
when the annular valve port (601) is in an open state, the annular lower expansion chamber (1401) is communicated with the upper through hole (201) through the annular valve port (601).
2. The double-deblocking packer for well flushing Jie Fengshang stripping according to claim 1, wherein the upper end of the central tube (2) and the upper end of the filtering sleeve (3) are fixedly connected in a sealing manner through the upper joint (1), an annular upper hydraulic cavity (302) is formed between the filtering sleeve (3) and the central tube (2), the annular upper hydraulic cavity (302) is arranged up and down with the deblocking piston (4), and the filtering through hole (301) is communicated with the annular upper hydraulic cavity (302).
3. The double-unset packer for lifting and unsetting a well-flushing Jie Fengshang according to claim 1, wherein an annular upper cavity (501) is formed between the unset piston (4) and the valve core (6), and the upper through hole (201), the annular upper cavity (501) and the annular valve port (601) are sequentially communicated.
4. The double-unsealing packer for lifting and unsealing a well washing Jie Fengshang according to claim 1, wherein a lifting ring (11) is sleeved in the unsealing sleeve (8), the upper end of the lifting ring (11) is clamped with the unsealing sleeve (8), the lower end of the lifting ring (11) is fixedly connected with an upper steel bowl (12), a strip-shaped through hole (1101) is formed in the side wall of the lifting ring (11), the length direction of the strip-shaped through hole (1101) is parallel to the axis direction of the central tube (2), a locking block (10) is fixedly arranged outside the central tube (2), and the locking block (10) is located in the strip-shaped through hole (1101).
5. The double-unset packer for lifting and unsetting a well-flushing Jie Fengshang as claimed in claim 4, wherein a through-flow hole (802) is arranged in the middle of the side wall of the unset sleeve (8), an annular gap is arranged between the lifting ring (11) and the central tube (2), and the through-flow hole (802), the strip-shaped through hole (1101) and the annular gap are communicated in sequence.
6. The double-deblocking packer for well cleanup Jie Fengshang stripping according to claim 1, wherein the upper cylinder sleeve (5) is connected with the upper steel bowl (12) through deblocking pins (13), and a sealing ring is arranged between the upper cylinder sleeve (5) and the upper steel bowl (12).
7. The double-deblocking packer for well flushing Jie Fengshang stripping according to claim 1, wherein an upper vulcanized cylinder sleeve (18) is sleeved in the upper end of the rubber cylinder (14), the upper end of the upper vulcanized cylinder sleeve (18) is fixedly connected with the upper cylinder sleeve (5), the upper vulcanized cylinder sleeve (18) is sleeved outside the central tube (2), and the inner diameter of the upper vulcanized cylinder sleeve (18) is larger than the outer diameter of the central tube (2).
8. The double-deblocking packer for well flushing Jie Fengshang lifting deblocking according to claim 1, characterized in that the lower end of the lower steel bowl (15) is connected with a lower joint (16), the lower joint (16) is fixedly connected with the central tube (2) in a sealing manner, the lower steel bowl (15) and the lower joint (16) are sleeved outside the central tube (2), an annular lower hydraulic cavity (1501) is formed between the lower steel bowl (15) and the central tube (2), a lower through hole (202) is formed in the lower portion of the side wall of the central tube (2), and the lower through hole (202) is communicated with the annular lower hydraulic cavity (1501).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861533.4A CN114086910B (en) | 2020-08-25 | 2020-08-25 | A kind of double unpacking packer for well cleaning, unsealing, lifting and unsealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861533.4A CN114086910B (en) | 2020-08-25 | 2020-08-25 | A kind of double unpacking packer for well cleaning, unsealing, lifting and unsealing |
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| Publication Number | Publication Date |
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| CN114086910A CN114086910A (en) | 2022-02-25 |
| CN114086910B true CN114086910B (en) | 2023-09-26 |
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| CN202010861533.4A Active CN114086910B (en) | 2020-08-25 | 2020-08-25 | A kind of double unpacking packer for well cleaning, unsealing, lifting and unsealing |
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| CN2931768Y (en) * | 2006-07-03 | 2007-08-08 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Small diameter water plugging packer |
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| CN206035441U (en) * | 2016-09-07 | 2017-03-22 | 中国石油化工股份有限公司 | Hydraulic pressure deblocking water injection packer |
| CN209799937U (en) * | 2019-03-18 | 2019-12-17 | 中国石油化工股份有限公司 | Separate-layer water injection device of casing damage repair well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2861470Y (en) * | 2005-12-13 | 2007-01-24 | 中国石化胜利油田有限公司采油工艺研究院 | Airtight power expansion packer |
| CN2931768Y (en) * | 2006-07-03 | 2007-08-08 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Small diameter water plugging packer |
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|---|---|
| CN114086910A (en) | 2022-02-25 |
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