Anti-creeping closed packer

Abstract

The invention relates to the technical field of packers, and discloses an anti-creeping closed packer which comprises a packer body, a slip, an anti-creeping device, a control device, an anti-creeping device, an anti-creeping device, an anti-creeping device, an anti-creeping device, an anti-creeping device, an anti-creeping device and an anti-creeping device, the tooth structure is arranged on the slip and used for being matched with the inner wall of a casing pipe in an abutting mode, and the slip provides support for the packer; and the first air cavity is arranged in the slip. When the slip is used and protrusions exist on the inner wall of the casing pipe to hinder movement of the tooth structures, extension of the tooth plates in the tooth structures can be achieved, and therefore it is guaranteed that the tooth plates in the tooth structures arranged on the slip can fully abut against the inner wall of the casing pipe, the anchoring and positioning effect on a packer is guaranteed, the phenomenon that the packer is not firmly anchored to generate wriggle can be prevented, and the service life of the packer is prolonged. And the toothed plate abutting against the protrusion can adapt to the shape of the protrusion and wraps the protrusion, so that the contact area of the toothed plate and the protrusion is increased, and then the anchoring stability of the toothed plate to the packer is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of packers, and in particular relates to an anti-creeping sealed packer. Background Art

[0002] A packer is a downhole tool used to isolate oil, gas and water layers in the casing for stratified oil production, stratified water injection, stratified testing and operations. The principle is: connect the packer to the downhole tubing, and after it is lowered to the designed depth, the sealing parts on the packer are expanded through hydraulic drive and other means to isolate the oil casing annulus. Different types of packers have different starting and unlocking methods.

[0003] When the existing packer is in use, when there is a protrusion on the inner wall of the casing that hinders the movement of the tooth structure on the slip, the entire slip will stop moving, and the remaining teeth will be unable to contact the inner wall of the casing, making the anchoring effect of the entire packer poor and prone to creep. Summary of the invention

[0004] In view of the above problems, the present invention provides an anti-creeping sealed packer to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An anti-creep sealed packer comprises a packer, a slip disposed on the packer for supporting the packer; a tooth structure disposed on the slip for contacting with an inner wall of a casing so that the slip provides support for the packer; a first air cavity disposed inside the slip for installation of the tooth structure; and a pushing assembly for pushing the tooth structure to extend outside the first air cavity.

[0006] Furthermore, the pushing assembly includes: a plug plate, arranged inside the first air cavity and connected to the tooth structure; an air duct, arranged inside the cava and connected to multiple first air cavities; a hose, arranged on the back side of the cava and connected to the air duct; a first channel, arranged inside the packer and used to connect the hose; and an air injection assembly, used to inject air into the first channel.

[0007] Furthermore, the tooth structure includes: a plurality of tooth plates, wherein the plurality of tooth plates are arranged from top to bottom to form the tooth structure.

[0008] Furthermore, the plug plate is provided with an adaptable component that allows the position of the tooth plate to be adaptively changed; the adaptable component includes: a rectangular column, arranged on the plug plate, for installing the tooth plate; a second air cavity, arranged on the tooth plate, one end of the rectangular column extends into the second air cavity; an elastic member, used to connect the rectangular column and the inner wall of the second air cavity; a positioning component, used to position the rectangular column in the second air cavity.

[0009] Furthermore, the positioning assembly includes: a sealing member, arranged at one end of the rectangular column located in the second air cavity; a third air cavity, arranged inside the plug plate; a second channel, arranged on the rectangular column, for connecting the third air cavity with the second air cavity; an exhaust port, arranged on the plug plate, for connecting the third air cavity with the first air cavity; and a solenoid valve, arranged in the exhaust port.

[0010] Furthermore, the tooth structure is configured to be cylindrical, and a slag stopper is provided at a position where the tooth structure passes through the first air cavity.

[0011] Furthermore, the hose is specifically configured as a high-pressure hydraulic hose.

[0012] Furthermore, the plug plate is specifically configured as a piston plate, and the air injected from the air passage can push the plug plate to slide along the inside of the first air cavity.

[0013] Technical effects and advantages of the present invention: 1. When the present invention is used, when there is a protrusion on the inner wall of the casing that hinders the movement of the tooth structure, the tooth plate in the tooth structure can be extended, thereby ensuring that the tooth plate in the tooth structure arranged on the slip can fully contact the inner wall of the casing, ensuring the anchoring and positioning effect of the packer, so as to prevent the packer from creeping due to loose anchoring; 2. The present invention can achieve that the tooth plate in contact with the protrusion adapts to the shape of the protrusion and covers the outside of the protrusion, thereby increasing the contact area between the tooth plate and the protrusion, thereby improving the stability of the tooth plate anchoring the packer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The structure diagram of the anti-creep sealing packer according to the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 2 The embodiment of the present invention is shown Figure 1 The enlarged structural diagram at A in the middle; Figure 3 A schematic diagram of the structure of the slips according to an embodiment of the present invention is shown; Figure 4 A schematic cross-sectional view of the slips according to an embodiment of the present invention is shown; Figure 5The embodiment of the present invention is shown Figure 4 The enlarged structural diagram at B in the middle; Figure 6 The structure diagram of the anti-creep sealing packer according to the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 7 The embodiment of the present invention is shown Figure 6 The enlarged structural diagram at C in the middle; Figure 8 The embodiment of the present invention is shown Figure 6 The enlarged structural diagram at D in the middle; In the figure: 1. Packer; 2. Slip; 3. First air cavity; 4. Plug plate; 5. Tooth plate; 6. Airway; 7. Hose; 8. Ring pipe; 9. Conduit; 10. Pressure relief valve 10; 11. Rectangular column; 12. Second air cavity; 13. Elastic member; 14. Third air cavity; 15. Exhaust port; 16. Solenoid valve; 17. Slag retainer; 18. Pipeline; 19. Sealing member. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0016] The present invention provides an anti-creeping sealed packer, such as Figures 1 to 8 As shown, it includes a packer 1, a slip 2, a tooth structure, a first air cavity 3, and a pushing assembly; The slip 2 is arranged on the packer 1 for supporting the packer 1. The packer 1 is a Y221 type packer. The slip 2 is a slip on a Y221 type packer in the prior art. The tooth structure is arranged on the slip 2 for contacting with the inner wall of the casing. The slip 2 provides support for the packer 1. The tooth structure is arranged in plurality. The first air cavity 3 is arranged inside the slip 2 for installing the tooth structure. The number of the first air cavity 3 is consistent with the number of the tooth structure. The pushing component is used to push the tooth structure to extend out of the first air cavity 3.

[0017] In use, the pipeline 18 is connected to the top of the packer 1 in the same way as the pipeline for collecting natural gas is connected to the packer in the prior art. After the connected pipeline 18 and packer 1 are lowered into the casing, when the packer 1 reaches the preset position, the slip 2 is driven to expand. The principle of driving the slip 2 to expand is the same as that of driving the slip on the Y221 model packer in the prior art, which will not be elaborated here. As the slip 2 expands, the tooth structure moves along with it. After the tooth structure abuts against the protrusion on the inner wall of the casing, the slip 2 can no longer move. Subsequently, the pushing component is used to push the remaining tooth structures that have not abutted against the protrusion to move along the first air chamber 3, so that after the slip 2 cannot move, the remaining tooth structures that have not abutted against the protrusion can continue to extend and finally abut against the inner wall of the casing, realizing the full contact between the tooth structure on the slip 2 and the inner wall of the casing. Relying on the frictional force between the tooth structure and the inner wall of the casing, the positioning of the packer 1 is completed. Subsequently, the rubber sleeve on the packer 1 is squeezed so that the rubber sleeve abuts against the inner wall of the casing, completing the separation of the internal space of the casing. The squeezing method of the rubber sleeve is the same as that of the rubber sleeve on the packer in the prior art, which will not be elaborated here; Through the above method, when there are protrusions on the inner wall of the casing that hinder the movement of the tooth structure, the extension of the remaining tooth structures can be realized, so as to ensure that the tooth structure on the slip 2 can fully abut against the inner wall of the casing and ensure the anchoring and positioning effect of the packer 1.

[0018] As Figures 1 to 5 shown, the pushing component includes: a plug plate 4, an air duct 6, a hose 7, a first channel, and an air injection component; the plug plate 4 is arranged inside the first air chamber 3 and is connected to the tooth structure. The first air chamber 3 is rectangular in shape, and the shape of the plug plate 4 matches that of the first air chamber 3. The air duct 6 is arranged inside the slip 2 and is connected to a plurality of first air chambers 3. The hose 7 is arranged on the back of the slip 2 and is connected to the air duct 6. The first channel is arranged inside the packer 1 and is used to connect the hose 7. One end of the hose 7 is connected to the first channel; The air injection component is used to inject air into the first channel. The air injection component can be composed of an annular pipe 8, a conduit 9, and a pressure relief valve 10. The annular pipe 8 is fixedly sleeved on the top of the packer 1 and is connected to the first channel. The conduit 9 is threadedly connected to the top of the annular pipe 8 and is connected to the annular pipe 8. The pressure relief valve 10 is arranged outside the conduit 9. The conduit 9 is customized according to actual needs. The outsides of the annular pipe 8 and the conduit 9 do not extend beyond the outside of the packer 1, so that the annular pipe 8 and the conduit 9 can be smoothly lowered into the casing. One end of the conduit 9 is connected to a vacuum pump compressor combination device (not shown in the figure), and a pressure detector is arranged on the conduit 9.

[0019] When the cava 2 cannot move, start the vacuum pump compressor combination equipment to inject air into the conduit 9. The air enters the first air cavity 3 through the annular tube 8, the first channel, the hose 7 and the air channel 6. With the injection of air, the plug plate 4 is pushed to move with the tooth structure, so that the tooth structure is close to the inner wall of the casing. When the tooth structure conflicts with the inner wall of the casing, the plug plate 4 stops moving. When all the plug plates 4 cannot move, with the injection of air, the air pressure in the space formed by the conduit 9, the annular tube 8, the first channel, the hose 7, the air channel 6 and the first air cavity 3 increases, and finally the pressure relief valve 10 is pushed open. At this time, the air injection of the vacuum pump compressor combination equipment is stopped, and the pressure relief valve 10 is manually closed. At this time, the plug plate 4 cannot move, so the tooth structure cannot move, and the position of the tooth structure is locked, thereby achieving the promotion of the tooth structure.

[0020] When the tooth structure moves to contact the protrusion on the inner wall of the casing, the contact surface between the tooth structure and the protrusion is small. Therefore, in order to increase the contact surface between the tooth structure and the protrusion and improve the stability of the tooth structure anchoring the casing, the following settings are adopted: like Figure 5 As shown, the tooth structure includes a plurality of tooth plates 5, and the plurality of tooth plates 5 are arranged from top to bottom to form the tooth structure.

[0021] The plug plate 4 is provided with an adaptable component that allows the position of the tooth plate 5 to be adaptively changed; The adaptation component includes: a rectangular column 11, a second air cavity 12, an elastic member 13, and a positioning component; the rectangular column 11 is fixedly mounted on the plug plate 4, the second air cavity 12 is arranged on the tooth plate 5, one end of the rectangular column 11 extends into the second air cavity 12, the elastic member 13 is used to connect the inner wall of the rectangular column 11 and the second air cavity 12, the elastic member 13 can be a spring, and the two ends of the elastic member 13 are fixedly connected to the inner wall of the rectangular column 11 and the second air cavity 12 respectively, and the positioning component is used to position the rectangular column 11 in the second air cavity 12.

[0022] When some of the tooth plates 5 come into contact with the protrusion, the tooth plates 5 that come into contact with the protrusion cannot move any further. As the plug plate 4 continues to move, the remaining tooth plates 5 on the plug plate 4 that do not come into contact with the protrusion can continue to move. At this time, the elastic member 13 connected to the tooth plates 5 that come into contact with the protrusion is compressed. When the subsequent tooth plates 5 also come into contact with the protrusion, the elastic member 13 connected to the rear of this part of the tooth plates 5 is also compressed. When the elastic member 13 can no longer be compressed, the plug plates 4 and the cava 2 cannot move. Subsequently, when all the plug plates 4 cannot move, the rectangular column 11 is positioned in the second air cavity 12 through the positioning assembly, so that the tooth plates 5 cannot move at this time. At this time, the tooth plates 5 that come into contact with the protrusion adapt to the shape of the protrusion and are wrapped around the protrusion, thereby increasing the contact area between the tooth plates 5 and the protrusion, thereby increasing the stability of the tooth plates 5 anchoring the packer 1.

[0023] like Figure 5 As shown, the positioning assembly includes: a seal 19, a third air cavity 14, a second channel, an exhaust port 15, and a solenoid valve 16; the seal 19 is arranged at one end of the rectangular column 11 located in the second air cavity 12, and the seal 19 can be a rubber gasket. The third air cavity 14 is arranged inside the plug plate 4, and the second channel is arranged on the rectangular column 11, which is used to connect the third air cavity 14 with the second air cavity 12, and the exhaust port 15 is arranged on the plug plate 4, which is used to connect the third air cavity 14 with the first air cavity 3. The solenoid valve 16 is fixedly arranged in the exhaust port 15, and the solenoid valve 16 can be controlled by a remote control device. The principle of remote control of the solenoid valve 16 by the remote control device is a prior art and will not be elaborated here.

[0024] In the initial state, the solenoid valve 16 is opened. With the movement of the cava 2 and the plug plate 4, when the tooth plate 5 collides with the protrusion, the rectangular column 11 on the plug plate 4 moves relative to the second air cavity 12, so that the air in the second air cavity 12 is squeezed outward, and the air is discharged through the second channel, the third air cavity 14, and the exhaust port 15, ensuring that the rectangular column 11 can move relative to the tooth plate 5 at this time. When all the plug plates 4 cannot move, the solenoid valve 16 is closed at this time. At this time, the air in the space formed by the second air cavity 12, the second channel, the third air cavity 14, and the exhaust port 15 cannot be discharged outward, so that the tooth plate 5 cannot move between the rectangular column 11, thereby completing the locking of the position of the tooth plate 5.

[0025] like Figure 5 As shown, the tooth structure is set to be cylindrical, and a slag stopper 17 is provided at the position where the tooth structure passes through the first air cavity 3. The slag stopper 17 can be a rubber ring. There is a gap between the inner side of the slag stopper 17 and the tooth plate 5. The gap can allow airflow to pass through. The slag stopper 17 can prevent larger particulate impurities from entering the first air cavity 3.

[0026] like Figure 3 As shown, the hose 7 is specifically configured as a high-pressure hydraulic hose.

[0027] The hose 7 itself can withstand the high pressure generated when air is injected.

[0028] like Figure 5 As shown, the plug plate 4 is specifically configured as a piston plate, and the air injected from the air channel 6 can push the plug plate 4 to slide along the inside of the first air cavity 3 .

[0029] Working principle: when in use, the pipeline 18 is connected to the top of the packer 1, and the connection method is the same as the connection method of the pipeline for collecting natural gas and the packer in the prior art. The connected pipeline 18 and the packer 1 are lowered into the casing. After the packer 1 reaches the preset position, the cava 2 is driven to expand. The principle of driving the expansion of the cava 2 is the same as the principle of driving the expansion of the cava on the Y221 model packer in the prior art, which will not be repeated here. As the cava 2 expands, the plug plate 4, the rectangular column 11, and the tooth plate 5 move with it. When part of the tooth plate 5 conflicts with the protrusion on the inner wall of the casing, the tooth plate 5 cannot continue to move. As the plug plate 4 continues to move, the remaining tooth plates 5 that have not conflicted with the protrusion can continue to move. At this time, the elastic connection of the tooth plate 5 that conflicts with the protrusion The component 13 is compressed. When the subsequent tooth plate 5 also conflicts with the protrusion, the elastic component 13 connected to the rear of this part of the tooth plate 5 is also compressed. In the initial state, the solenoid valve 16 is opened. With the movement of the plug plate 4, when the tooth plate 5 conflicts with the protrusion, the rectangular column 11 on the plug plate 4 moves relative to the second air cavity 12, so that the air in the second air cavity 12 is squeezed out, and the air is discharged through the second channel, the third air cavity 14, and the exhaust port 15, ensuring that the rectangular column 11 can move relative to the tooth plate 5 at this time. When the elastic component 13 can no longer be compressed, the plug plate 4 can no longer move at this time, and the slip 2 can no longer move at this time. The vacuum pump compressor combination equipment is started to inject air into the conduit 9, and the air enters the annular tube 8, the first channel, the hose 7, and the airway 6. In the first air cavity 3, with the injection of air, the plug plate 4, the rectangular column 11, and the tooth plate 5 are pushed to move. After the tooth plate 5 contacts the inner wall of the sleeve, with the movement of the plug plate 4, the elastic member 13 is compressed. When the elastic member 13 can no longer be compressed, the plug plate 4 can no longer move. At this time, all the plug plates 4 can no longer move. With the injection of air, the air pressure in the space formed by the conduit 9, the annular tube 8, the first channel, the hose 7, the airway 6, and the first air cavity 3 increases, and finally the pressure relief valve 10 is pushed open. At this time, the air injection of the vacuum pump compressor combination equipment is stopped, and the pressure relief valve 10 is manually closed. At this time, the position of the plug plate 4 is locked. When all the plug plates 4 can no longer move, the solenoid valve 16 is closed. At this time, the second air cavity 12, the second channel, the third air cavity 14, the exhaust The air in the space formed by the opening 15 cannot be discharged to the outside, so that the tooth plate 5 cannot move between the rectangular column 11, and the position of the tooth plate 5 is locked. At this time, the tooth plate 5 in contact with the protrusion adapts to the shape of the protrusion and is wrapped outside the protrusion, thereby increasing the contact area between the tooth plate 5 and the protrusion, thereby increasing the stability of the tooth plate 5 anchoring the packer 1. The remaining tooth plates 5 are in conflict with the inner wall of the casing. Through the above method, when there is a protrusion on the inner wall of the casing that hinders the movement of the tooth structure, the tooth plate 5 in the tooth structure can extend itself, thereby ensuring that the tooth plate 5 in the tooth structure set on the slip 2 can fully conflict with the inner wall of the casing, ensuring the anchoring and positioning effect of the packer 1, and preventing the packer 1 from creeping due to loose anchoring. Subsequently, the rubber sleeve on the packer 1 is squeezed.The rubber sleeve is made to contact with the inner wall of the casing to complete the separation of the internal space of the casing, wherein the extrusion method of the rubber sleeve is the same as the extrusion method of the rubber sleeve on the packer in the prior art, which will not be described in detail here; Before use, the initial air pressure value in the conduit 9 can be known by the pressure detector on the conduit 9. When it is necessary to cancel the anchoring, cancel the squeezing of the rubber sleeve on the packer 1, cancel the sealing, then open the solenoid valve 16, and reverse the vacuum pump compressor combination equipment to draw back the air. Conversely, the plug plate 4 is reset. After all the plug plates 4 are reset, it is convenient to timely understand the air pressure situation by observing the pressure detector on the conduit 9. When it is found that the air pressure value reaches the initial air pressure value, it means that all the plug plates 4 are reset. At this time, stop the vacuum pump compressor combination equipment, reset the cava 2, and with the reset of the cava 2 and the plug plate 4, the elastic member 13 is reset with the tooth plate 5 to complete the overall reset. At this time, the connection between the packer 1 and the casing is canceled.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. An anti-creep sealed packer, comprising a packer (1), characterized in that: Slips (2) are arranged on the packer (1) and are used to support the packer (1); a tooth structure, arranged on the slip (2), and used for contacting with the inner wall of the casing to cooperate with the slip (2) to provide support for the packer (1); A first air cavity (3) is arranged inside the slip (2) and is used for mounting the tooth structure; A pushing component is used to push the tooth structure to extend outside the first air cavity (3).

2. The anti-creep sealing packer according to claim 1, characterized in that: The pushing component comprises: A plug plate (4) is arranged inside the first air cavity (3) and is connected to the tooth structure; an air channel (6) disposed inside the slip (2) and connected to the plurality of first air cavities (3); A hose (7) is arranged on the back of the slip (2) and is connected to the air passage (6); A first channel, arranged inside the packer (1) and used for connecting the hose (7); The air injection component is used to inject air into the first channel.

3. The anti-creep sealing packer according to claim 2, characterized in that: The tooth structure comprises: The tooth plates (5) are provided in plurality, and the plurality of tooth plates (5) are arranged from top to bottom to form a tooth structure.

4. The anti-creep sealing packer according to claim 3, characterized in that: The plug plate (4) is provided with an adaptable component that enables the position of the tooth plate (5) to be adaptively changed; the adaptable component comprises: A rectangular column (11) is arranged on the plug plate (4) and is used for mounting the tooth plate (5); A second air cavity (12) is arranged on the tooth plate (5), and one end of the rectangular column (11) extends into the second air cavity (12); An elastic member (13) used for connecting the rectangular column (11) and the inner wall of the second air cavity (12); A positioning component is used to position the rectangular column (11) in the second air cavity (12).

5. The anti-creep sealing packer according to claim 4, characterized in that: The positioning component comprises: A sealing member (19) is arranged at one end of the rectangular column (11) located in the second air cavity (12); A third air cavity (14) is arranged inside the plug plate (4); A second channel, provided on the rectangular column (11), and used for connecting the third air cavity (14) with the second air cavity (12); an exhaust port (15) disposed on the plug plate (4) and used to connect the third air cavity (14) with the first air cavity (3); The solenoid valve (16) is arranged in the exhaust port (15).

6. The anti-creep sealing packer according to claim 5, characterized in that: The tooth structure is arranged in a cylindrical shape, and a slag stopper (17) is provided at a position where the tooth structure passes through the first air cavity (3).

7. The anti-creep sealing packer according to claim 6, characterized in that: The hose (7) is specifically configured as a hydraulic hose.

8. The anti-creep sealing packer according to claim 7, characterized in that: The plug plate (4) is specifically configured as a piston plate, and the air injected from the air channel (6) can push the plug plate (4) to slide along the inside of the first air cavity (3).

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