CN215979293U - Recyclable packer - Google Patents

Abstract

The utility model provides a recoverable packer, which relates to the technical field of oil extraction equipment and is used for extending into a casing to pack the casing, and the packer comprises: the sealing device comprises a sealing mechanism, an unsealing mechanism, a sealing mechanism and a central tube main body; through the sealing sleeve pipe of sealing mechanism, the sealing sleeve pipe of deblocking mechanism to through the sealing sleeve pipe of sealing mechanism, alleviated the sealing that exists among the prior art and the inconvenient technical problem of deblocking, all can accomplish in the pit when having reached and sealing and deblocking, sealing and deblocking convenient operation need not the technological effect of putting into the instrument once more.

Description

Recyclable packer

Technical Field

The utility model relates to the technical field of oil extraction equipment, in particular to a recyclable packer.

Background

Among the prior art, during oil recovery, need past several kilometers pipeline and instrument in the pit, need fix the instrument in order to prevent that the instrument from falling into needs in the pit, need seal the annular space of oil jacket simultaneously to the phenomenon that pressure scurries appears when preventing to recover oil, generally adopt the packer to seal.

However, when the packer is used for sealing the oil sleeve, the setting and the unsealing are very inconvenient, and generally a tool for setting or unsealing needs to be put in again for setting and unsealing.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a recyclable packer to relieve the technical problem of inconvenient setting and unpacking in the prior art.

The utility model provides a recoverable packer device, which is used for packing a sleeve extending into the sleeve and comprises: the sealing device comprises a sealing mechanism, an unsealing mechanism, a sealing mechanism and a central tube main body;

the base seal mechanism is sleeved on the central pipe main body and comprises a base seal pin, and the base seal mechanism is connected with the central pipe main body through the base seal pin; the base seal mechanism is provided with a communication channel with the central pipe main body, the inside of the central pipe main body is used for conveying high-pressure fluid, and the base seal mechanism is used for moving relative to the central pipe main body along the conveying direction of the high-pressure fluid under the action of the high-pressure fluid so as to cut off the base seal pin;

the sealing mechanism is sleeved on the central pipe main body, the end part of the sealing mechanism is abutted against the seat sealing mechanism, and the seat sealing mechanism is used for extruding the sealing mechanism so as to connect the sealing mechanism with a sleeve on the outer side;

the deblocking mechanism sets up on the center tube main part, the deblocking mechanism with the center tube main part is connected, the center tube main part can for the reverse movement of seat sealing mechanism along high-pressure fluid direction of delivery is with cutting off the deblocking mechanism, the center tube main part is used for driving seat sealing mechanism is along keeping away from sealing mechanism's one side motion, so that sealing mechanism separates with the sleeve pipe in the outside.

In an alternative embodiment, the center tube body comprises an upper joint, a connecting tube, a center tube, and a lower joint;

the deblocking mechanism is positioned between the upper joint and the connecting pipe, the upper joint is connected with the connecting pipe through the deblocking mechanism, one end, far away from the upper joint, of the connecting pipe is connected with one end of the central pipe, the other end of the central pipe is connected with one end of the lower joint, and the upper joint, the connecting pipe, the central pipe and the lower joint are communicated;

the upper joint is connected with the sealing mechanism in a sliding mode, the upper joint is used for moving along the reverse direction of the high-pressure fluid conveying direction relative to the connecting pipe so as to cut off the unsealing mechanism, and the upper joint is used for driving the sealing mechanism to move along one side far away from the sealing mechanism.

In an alternative embodiment, the seating mechanism further comprises a piston and sleeve assembly;

the sleeve component is sleeved outside the central pipe, a sealing cavity is arranged between the sleeve component and the central pipe, the piston is located inside the sealing cavity and communicated with the central pipe through the circulation channel, the piston is connected with the sleeve component, the sleeve component is abutted to the sealing mechanism, and the central pipe is used for conveying high-pressure fluid into the sealing cavity, so that the piston drives the sleeve component to move and extrude one side of the sealing mechanism to the sealing mechanism.

In an alternative embodiment, the sleeve assembly includes a piston sleeve, a first sleeve, and a second sleeve;

the two ends of the first sleeve are respectively connected with the piston sleeve and the second sleeve, the piston sleeve and the first sleeve jointly form the sealing cavity with the central pipe, one end, far away from the first sleeve, of the piston sleeve is abutted to the sealing mechanism, one end, close to the first sleeve, of the piston sleeve is abutted to one side of the piston, and the piston extrudes the sealing mechanism through the piston sleeve;

the second sleeve is sleeved outside the upper joint, the seat seal pin is located between the second sleeve and the upper joint, two ends of the seat seal pin are connected with the second sleeve and the upper joint respectively, and the piston sleeve drives the second sleeve to move relative to the upper joint through the first sleeve so as to cut off the seat seal pin.

In an alternative embodiment, the sleeve assembly further comprises a locking ring;

the locking ring is located between the first sleeve and the connecting pipe, a clamping groove is formed in one side, close to the connecting pipe, of the first sleeve, the locking ring is clamped inside the clamping groove, first one-way teeth are arranged on one side, close to the connecting pipe, of the locking ring, second one-way teeth matched with the first one-way teeth are arranged on the outer side wall of the connecting pipe, the locking ring is connected with the second one-way teeth of the connecting pipe in a matched mode through the first one-way teeth, and the first one-way teeth and the second one-way teeth are used for limiting one-way movement of the locking ring along the conveying direction of high-pressure fluid so as to limit one-way movement of the first sleeve and the connecting pipe.

In an alternative embodiment, a locking block is also included;

deblocking mechanism includes the deblocking pin, the both ends of deblocking pin respectively with the top connection with the connecting pipe is connected, the locking piece is located the top connection with between the connecting pipe, just the both ends of locking piece respectively with the top connection with the connection can be dismantled to the connecting pipe, the locking piece is used for the restriction the top connection with connecting pipe relative motion.

In an alternative embodiment, the sealing mechanism includes a packing body, a securing ring, and a packing ring;

the packing main part cover is established on the center tube, the packing snare is established in the packing main part, piston sleeve keeps away from first telescopic pot head is established in the packing main part, and with packing main part sliding connection, piston sleeve's one end with packing circle butt, gu fixed ring is located the packing main part is kept away from piston sleeve's one end, just gu fixed ring with the packing main part is connected, gu fixed ring with the packing circle is kept away from piston sleeve's one end butt, piston sleeve can be relative the packing main part slides, so that piston sleeve extrudes the packing circle.

In an alternative embodiment, the sealing mechanism further comprises a spacer ring and a fixed ring;

the packing rings are arranged in a plurality, are all sleeved outside the packing main body and are arranged at intervals along the axial direction of the packing main body, the spacer ring is positioned between any two adjacent packing rings and is abutted against the packing rings;

the sizing ring is positioned between the seal ring and the piston sleeve, the sizing ring is sleeved at one end of the seal ring, and the seal ring is abutted against the piston sleeve through the sizing ring.

In an alternative embodiment, an anchoring mechanism is further included;

anchoring mechanism cover is located the outside of center tube, anchoring mechanism's one end with seal and separate the main part and keep away from piston sleeve's one end butt, anchoring mechanism's the other end with the lower clutch is connected, piston sleeve passes through solid fixed ring drives seal and separate the main part and remove to being close to anchoring mechanism's one end, so that anchoring mechanism has the order seal and separate the main part to the motion trend that piston sleeve's one end removed.

In an alternative embodiment, the anchoring mechanism includes slips, a resilient member, a slip cap, and an upper cone;

the slip cover is sleeved outside the central tube, the slip, the elastic element and the upper cone are positioned between the slip cover and the central tube, a through hole is formed in the slip cover, and the slip can penetrate through the through hole and is abutted to the inner wall of the sleeve; the slip is provided with a plurality of slips which are distributed at intervals along the circumferential direction of the slip cover, inclined planes are arranged at two ends of each slip, and two ends of each slip are respectively connected with the upper cone and the lower connector;

go up the cone cover and establish on the center tube, go up the cone with center tube sliding connection, just go up the cone with pack apart the main part butt, pack apart the main part and be used for driving go up the cone along the axis direction reciprocating motion of center tube, so that the slips is along being close to the direction motion of slips cover, the both ends of elastic component respectively with a plurality of the slips with slips cover butt, the elastic component has and makes a plurality ofly the slips is kept away from the motion trend of slips cover.

The utility model provides a recoverable packer device, which is used for packing a sleeve extending into the sleeve and comprises: the sealing device comprises a sealing mechanism, an unsealing mechanism, a sealing mechanism and a central tube main body; the base seal mechanism is sleeved on the central tube main body and comprises a base seal pin, and the base seal mechanism is connected with the central tube main body through the base seal pin; a flow passage is arranged between the seat sealing mechanism and the central pipe main body, the interior of the central pipe main body is used for conveying high-pressure fluid, and the seat sealing mechanism is used for moving along the conveying direction of the high-pressure fluid relative to the central pipe main body under the action of the high-pressure fluid so as to cut off the seat sealing pin; the sealing mechanism is sleeved on the central tube main body, the end part of the sealing mechanism is abutted against the seat sealing mechanism, and the seat sealing mechanism is used for extruding the sealing mechanism so as to connect the sealing mechanism with the outer sleeve; deblocking mechanism sets up on the center tube main part, and deblocking mechanism is connected with the center tube main part, and the center tube main part can be for the reverse movement of seat mechanism along high-pressure fluid direction of delivery to cut off deblocking mechanism, the center tube main part is used for driving seat mechanism along the one side motion of keeping away from sealing mechanism, so that sealing mechanism and the sleeve pipe separation in the outside. Through the setting sleeve pipe of setting mechanism to through deblocking mechanism deblocking sleeve pipe, alleviated setting and the inconvenient technical problem of deblocking that exist among the prior art, all can accomplish in the pit when having reached and carrying out setting and deblocking, setting and deblocking convenient operation need not the technological effect of putting into the instrument once more.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of a retrievable packer device according to an embodiment of the utility model;

FIG. 2 is a cross-sectional view of a locking block of a retrievable pack-off provided by an embodiment of the utility model;

FIG. 3 is a partial cross-sectional view of a locking ring and a deblocking sleeve of a retrievable packer according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a setting mechanism of a retrievable pack-off device according to an embodiment of the utility model;

FIG. 5 is a partial cross-sectional view of a slip of a retrievable packer according to an embodiment of the utility model.

Icon: 100-a seating mechanism; 110-seat seal pin; 120-a piston; 130-a sleeve assembly; 131-a piston sleeve; 132-a first sleeve; 133-a second sleeve; 134-a locking ring; 200-a deblocking mechanism; 300-a sealing mechanism; 310-packing body; 320-a packing ring; 330-spacer ring; 340-shaped ring; 350-a fixed ring; 400-a center tube body; 410-upper joint; 420-a connecting tube; 430-center tube; 440-lower joint; 500-an anchoring mechanism; 510-slips; 520-an elastic member; 530-slip cover; 540-upper cone; 600-locking block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1-5, a retrievable packer according to an embodiment of the present invention, for inserting into a casing to pack the casing, includes: a setting mechanism 100, a deblocking mechanism 200, a sealing mechanism 300, and a central tube body 400; the seat sealing mechanism 100 is sleeved on the central tube main body 400, the seat sealing mechanism 100 comprises a seat sealing pin 110, and the seat sealing mechanism 100 is connected with the central tube main body 400 through the seat sealing pin 110; a flow passage is formed between the seat sealing mechanism 100 and the central tube main body 400, the inside of the central tube main body 400 is used for conveying high-pressure fluid, and the seat sealing mechanism 100 is used for moving relative to the central tube main body 400 along the conveying direction of the high-pressure fluid under the action of the high-pressure fluid so as to cut off the seat sealing pin 110; the sealing mechanism 300 is sleeved on the central tube main body 400, the end part of the sealing mechanism 300 is abutted against the seating mechanism 100, and the seating mechanism 100 is used for extruding the sealing mechanism 300 so as to connect the sealing mechanism 300 with a sleeve on the outer side; the unsealing mechanism 200 is disposed on the central tube main body 400, the unsealing mechanism 200 is connected to the central tube main body 400, the central tube main body 400 can move in the direction opposite to the high-pressure fluid conveying direction relative to the sealing mechanism 100 to cut off the unsealing mechanism 200, and the central tube main body 400 is used for driving the sealing mechanism 100 to move along the side far away from the sealing mechanism 300 to separate the sealing mechanism 300 from the casing on the outer side.

It should be noted that the high-pressure fluid may be industrial water, the central tube main body 400 is cylindrical, and the interior of the central tube main body 400 is through, wherein a first seating groove is disposed on one side of the central tube main body 400 close to the seating mechanism 100, a second seating groove is disposed on one side of the seating mechanism 100 close to the central tube main body 400, the first seating groove and the second seating groove have opposite opening directions, the first seating groove and the second seating groove are corresponding in position, the first seating groove and the second seating groove are used for being engaged with the seating pin 110, further, a filling port is disposed on the inner wall of the central tube main body 400, and the high-pressure fluid is connected to the seating mechanism 100 through the filling port, so that the high-pressure fluid pushes the seating mechanism 100 through the filling port, so that the seating mechanism 100 moves along the conveying direction of the high-pressure fluid relative to the central tube main body 400 under the action of the high-pressure fluid, to cut off the seat seal pin 110, further, one end of the sealing mechanism 300 close to the seat seal mechanism 100 is abutted with the seat seal mechanism 100, the sealing mechanism 300 is deformed under the extrusion of the seat seal mechanism 100, so that the outer diameter of the sealing mechanism 300 is increased and is abutted with the inner wall of the outer casing, thereby seating the casing; in deblocking mechanism 200, deblocking mechanism 200 can include the pin, when needing the deblocking, through lifting center tube body 400 and cutting off deblocking mechanism 200, make center tube body 400 drive setting mechanism 100 along the one side motion of keeping away from sealing mechanism 300, make sealing mechanism 300 resume deformation, namely, sealing mechanism 300's external diameter reduces, thereby make sealing mechanism 300's the outside and the separation of sheathed tube inner wall, make the sleeve pipe deblocking, center tube body 400 drives setting mechanism 100 simultaneously, deblocking mechanism 200 and sealing mechanism 300 stretch out the oil well, make recoverable packer obtain retrieving, make things convenient for reutilization, reach cost-effective effect, make oil pipe's setting and deblocking process simpler simultaneously, need not to put into the instrument again and carry out the purpose of setting and deblocking.

The embodiment of the utility model provides a recyclable packer, which is used for extending into a casing to pack the casing, and comprises: a setting mechanism 100, a deblocking mechanism 200, a sealing mechanism 300, and a central tube body 400; the seat sealing mechanism 100 is sleeved on the central tube main body 400, the seat sealing mechanism 100 comprises a seat sealing pin 110, and the seat sealing mechanism 100 is connected with the central tube main body 400 through the seat sealing pin 110; a flow passage is formed between the seat sealing mechanism 100 and the central tube main body 400, the inside of the central tube main body 400 is used for conveying high-pressure fluid, and the seat sealing mechanism 100 is used for moving relative to the central tube main body 400 along the conveying direction of the high-pressure fluid under the action of the high-pressure fluid so as to cut off the seat sealing pin 110; the sealing mechanism 300 is sleeved on the central tube main body 400, the end part of the sealing mechanism 300 is abutted against the seating mechanism 100, and the seating mechanism 100 is used for extruding the sealing mechanism 300 so as to connect the sealing mechanism 300 with a sleeve on the outer side; the unsealing mechanism 200 is disposed on the central tube main body 400, the unsealing mechanism 200 is connected to the central tube main body 400, the central tube main body 400 can move in the direction opposite to the high-pressure fluid conveying direction relative to the sealing mechanism 100 to cut off the unsealing mechanism 200, and the central tube main body 400 is used for driving the sealing mechanism 100 to move along the side far away from the sealing mechanism 300 to separate the sealing mechanism 300 from the casing on the outer side. Through the casing pipe of setting mechanism 100 setting to through the 200 deblocking sleeves of deblocking mechanism, alleviate the inconvenient technical problem of setting and deblocking that exist among the prior art, reached and all can accomplish in the pit when setting and deblocking, setting and deblocking convenient operation need not to put into the technological effect of instrument once more.

In an alternative embodiment, the center tube body 400 includes an upper joint 410, a connecting tube 420, a center tube 430, and a lower joint 440; the unsealing mechanism 200 is positioned between the upper connector 410 and the connecting pipe 420, the upper connector 410 is connected with the connecting pipe 420 through the unsealing mechanism 200, one end, far away from the upper connector 410, of the connecting pipe 420 is connected with one end of the central pipe 430, the other end of the central pipe 430 is connected with one end of the lower connector 440, and the upper connector 410, the connecting pipe 420, the central pipe 430 and the lower connector 440 are communicated; the upper joint 410 is slidably connected to the setting mechanism 100, the upper joint 410 is configured to move in a direction opposite to a direction of delivering the high-pressure fluid relative to the connection pipe 420 to cut off the unsealing mechanism 200, and the upper joint 410 is configured to drive the setting mechanism 100 to move along a side away from the sealing mechanism 300.

In this embodiment, the axes of the upper joint 410, the connecting pipe 420, the central pipe 430 and the lower joint 440 are coincident, the sealing mechanism 300 is sleeved outside the central pipe 430, the sealing mechanism 300 is slidably connected to the central pipe 430, the seating mechanism 100 is sleeved outside the upper joint 410, the connecting pipe 420 and the central pipe 430, wherein the upper joint 410 extends from inside of the seating mechanism 100, further, the seating pin 110 is connected to the upper joint 410, the upper joint 410 is connected to the connecting pipe 420 through the unsealing mechanism 200, by lifting the upper joint 410 and breaking the unsealing mechanism 200, the central pipe body 400 can move relative to the seating mechanism 100, so that the seating mechanism 100 moves along with the pulling direction of the central pipe body 400, so that the seating mechanism 100 moves away from the sealing mechanism 300, so that the outer diameter of the sealing mechanism 300 is reduced, and the outer diameter of the sealing mechanism 300 is separated from the inner wall of the casing, so as to unsealing the casing, by separating the upper joint 410 and the connecting pipe 420 to unlock the seat seal, the technical effect that the tool does not need to be put in again and the unlocking is easy is achieved.

In an alternative embodiment, the seating mechanism 100 further includes a piston 120 and a sleeve assembly 130; the sleeve assemblies 130 are all sleeved outside the central tube 430, a sealing cavity is formed between the sleeve assemblies 130 and the central tube 430, the piston 120 is located inside the sealing cavity, the piston 120 is communicated with the central tube 430 through a flow passage, the piston 120 is connected with the sleeve assemblies 130, the sleeve assemblies 130 are abutted to the sealing mechanism 300, and the central tube 430 is used for conveying high-pressure fluid into the sealing cavity, so that the piston 120 drives the sleeve assemblies 130 to move to one side of the sealing mechanism 300 to squeeze the sealing mechanism 300.

In this embodiment, the piston 120 is annular and is sleeved on the central tube 430, one side of the piston 120 abuts against the sleeve assembly 130, and the other side abuts against one end of the connecting tube 420, wherein the sealing cavity is annular, the size of the sealing cavity is the same as that of the piston 120, that is, the piston 120 can reciprocate in the sealing cavity along the axial direction of the central tube 430, further, the sleeve assembly 130 is connected with the upper joint 410 through the seating pin 110, the piston 120 drives the sleeve assembly 130 and the upper joint 410 to move relatively, so that the seating pin 110 is sheared, thereby the piston 120 drives the sleeve assembly 130 to move towards one side of the sealing mechanism 300 to squeeze the sealing mechanism 300, further, the side wall of the central tube 430 is provided with a seating through hole, the seating through hole is arranged between the piston 120 and the connecting tube 420, that is the seating through hole is arranged through the central tube 430, that the interior of the central tube 430 is communicated with the sealing cavity, therefore, high-pressure fluid flows into the sealing cavity through the seat sealing through hole and pushes the piston 120 to move, so that the seat sealing can be completed only by adding the high-pressure fluid without adding tools again in the seat sealing process, the seat sealing is very convenient, and the seat sealing process is smoother.

In an alternative embodiment, sleeve assembly 130 includes a piston sleeve 131, a first sleeve 132, and a second sleeve 133; the two ends of the first sleeve 132 are respectively connected with the piston sleeve 131 and the second sleeve 133, the piston sleeve 131 and the first sleeve 132 together form a sealed cavity with the central tube 430, one end of the piston sleeve 131, which is far away from the first sleeve 132, abuts against the sealing mechanism 300, one end of the piston sleeve 131, which is close to the first sleeve 132, abuts against one side of the piston 120, and the piston 120 presses the sealing mechanism 300 through the piston sleeve 131; the second sleeve 133 is sleeved outside the upper joint 410, the seat seal pin 110 is located between the second sleeve 133 and the upper joint 410, two ends of the seat seal pin 110 are respectively connected with the second sleeve 133 and the upper joint 410, and the piston sleeve 131 drives the second sleeve 133 to move relative to the upper joint 410 through the first sleeve 132 to cut off the seat seal pin 110.

In this embodiment, one end of the piston sleeve 131 and one end of the second sleeve 133 respectively extend into the two ends of the first sleeve 132 and are in threaded connection with the first sleeve 132, wherein one end of the piston sleeve 131 extending into the first sleeve 132 abuts against one side of the piston 120, the other side of the piston 120 abuts against one end of the first sleeve 132 and one end of the connecting pipe 420, further, the second sleeve 133 is disposed away from the sealing mechanism 300, a first seating groove is disposed on the inner wall of the second sleeve 133, and correspondingly, a second seating groove is disposed on the upper joint 410, the first seating groove and the second seating groove are used for mounting the seating pin 110, the high-pressure fluid flows into the sealing cavity through the flow channel and presses the piston 120, so that the piston 120 drives the first sleeve 132 to move relative to the main body 400 through the piston sleeve 131, so that the first central pipe 132 drives the second sleeve 133 to move relative to the upper joint 410 along the conveying direction of the high-pressure fluid, so that the first seating groove and the second seating groove shear the seating pin 110, and the seating process is simple, low in cost and convenient to maintain through the transmission of the sleeve.

In an alternative embodiment, the sleeve assembly 130 further includes a locking ring 134; the locking ring 134 is located between the first sleeve 132 and the connecting pipe 420, a clamping groove is formed in one side, close to the connecting pipe 420, of the first sleeve 132, the locking ring 134 is clamped inside the clamping groove, first one-way teeth are formed in one side, close to the connecting pipe 420, of the locking ring 134, second one-way teeth matched with the first one-way teeth are formed in the outer side wall of the connecting pipe 420, the locking ring 134 is connected with the second one-way teeth of the connecting pipe 420 through the first one-way teeth in a matched mode, and the first one-way teeth and the second one-way teeth are used for limiting one-way movement of the locking ring 134 along the conveying direction of high-pressure fluid so as to limit one-way movement of the first sleeve 132 and the connecting pipe 420.

In this embodiment, the locking ring 134 is sleeved on the upper joint 410, the inner portion of the first sleeve 132 is provided with an abutting boss, the abutting boss and one end of the second sleeve 133 form a clamping groove, further, one side of the locking ring 134 abuts against the inner portion of the first sleeve 132, the other side of the locking ring 134 abuts against one end of the second sleeve 133, and the inclination direction of the one-way teeth on the locking ring 134 is the opposite direction of the high-pressure fluid filling, the inclination direction of the one-way teeth on the upper joint 410 is the high-pressure fluid filling direction, during the seat sealing process, the first sleeve 132 drives the second sleeve 133 to move along the direction of the high-pressure fluid, at this time, the second sleeve 133 abuts against the locking ring 134, and the locking ring 134 can only move along the high-pressure fluid filling direction through the one-way teeth, when the seat sealing is finished, the sealing mechanism 300 has a tendency that the loose sleeve moves towards the opposite direction of the high-pressure fluid due to elastic potential energy, the first sleeve 132 and the second sleeve 133 are driven to have the tendency of moving towards the opposite direction of the high-pressure fluid direction, but at the moment, the first one-way teeth on the locking ring 134 abut against the second one-way teeth on the upper connector 410, so that the locking ring 134 cannot move along the opposite direction of the high-pressure fluid filling direction, the seated seal is firm, and the automatic unseating is prevented.

In an alternative embodiment, a locking block 600 is also included; the unsealing mechanism 200 comprises an unsealing pin, two ends of the unsealing pin are respectively connected with the upper joint 410 and the connecting pipe 420, the locking block 600 is positioned between the upper joint 410 and the connecting pipe 420, two ends of the locking block 600 are respectively detachably connected with the upper joint 410 and the connecting pipe 420, and the locking block 600 is used for limiting the relative movement of the upper joint 410 and the connecting pipe 420.

In this embodiment, a through locking hole is formed in the upper joint 410, correspondingly, a locking groove is formed in the connecting pipe 420, the locking block 600 penetrates through the locking hole and abuts against the locking groove, the other side of the locking block 600 abuts against the second sleeve 133, wherein a chamfer is formed on one side of the locking block 600 abutting against the locking groove, a separation channel is formed in the second sleeve 133, after the upper joint 410 is seated, the second sleeve 133 moves relative to the upper joint 410 along the direction of high-pressure fluid, the other side of the locking block 600 is located in the separation channel, when the upper joint 410 is pulled to unlock, the locking block 600 is squeezed and separated from the locking groove, the unlocking pin is broken, the upper joint 410 is separated from the connecting pipe 420, a protrusion is formed on one side of the upper joint 410 close to the sealing mechanism 300, the locking ring 134 abuts against the protrusion, and the upper joint 410 drives the locking ring 134, the locking groove and the locking groove at one time through the protrusion, The second sleeve 133, the first sleeve 132 and the piston sleeve 131 move away from the sealing mechanism 300, so that the sealing mechanism 300 recovers deformation, namely, the outer side of the sealing mechanism 300 is separated from the inner wall of the sleeve, the purpose of unsealing is achieved, the sealing mechanism is locked by the locking block 600 to prevent being unsealed in advance in the well descending process, and meanwhile, the upper joint 410 is used for unlocking and simultaneously pulling the recyclable packer, so that the recyclable packer is convenient to recycle.

In an alternative embodiment, sealing mechanism 300 includes a packing body 310, a retaining ring 350, and a packing ring 320; the packing main body 310 is sleeved on the central tube 430, the packing ring 320 is sleeved on the packing main body 310, one end of the piston sleeve 131, which is far away from the first sleeve 132, is sleeved on the packing main body 310 and is in sliding connection with the packing main body 310, one end of the piston sleeve 131 is abutted against the packing ring 320, the fixing ring 350 is located at one end of the packing main body 310, which is far away from the piston sleeve 131, the fixing ring 350 is connected with the packing main body 310, the fixing ring 350 is abutted against one end of the packing ring 320, which is far away from the piston sleeve 131, and the piston sleeve 131 can slide relative to the packing main body 310, so that the piston sleeve 131 extrudes the packing ring 320.

In this embodiment, a plurality of packing rings 320 are provided, and the plurality of packing rings 320 are arranged at intervals along the axial direction of the central tube 430, wherein the plurality of packing rings 320 may be made of rubber, further, one end of the packing main body 310 away from the piston sleeve 131 is provided with a fixing ring 350, the fixing ring 350 is fixedly connected with the packing main body 310, such that when the piston sleeve 131 presses the plurality of packing rings 320, the other end of the plurality of packing rings 320 abuts against the fixing ring 350, such that the plurality of packing rings 320 are forced and pressed, further, one end of the packing main body 310 close to the upper joint 410 is provided with a first abutting protrusion, one end of the piston sleeve 131 away from the upper joint 410 is provided with a second abutting protrusion, the piston sleeve 131 is sleeved on one end of the packing main body 310 and the first abutting protrusion abuts against the second abutting protrusion, such that the piston sleeve 131 can pull the packing main body 310 to rise simultaneously during rising, facilitating recovery of the packing body 310.

In an alternative embodiment, the sealing mechanism 300 further includes a spacer ring 330 and a sizing ring 340; the plurality of packing rings 320 are arranged, the plurality of packing rings 320 are all sleeved outside the packing main body 310, the plurality of packing rings 320 are arranged at intervals along the axial direction of the packing main body 310, the spacer ring 330 is positioned between any two adjacent packing rings 320, and the spacer ring 330 is abutted to the packing rings 320; the fixed ring 340 is located between the packing ring 320 and the piston sleeve 131, the fixed ring 340 is sleeved on one end of the packing ring 320, and the packing ring 320 abuts against the piston sleeve 131 through the fixed ring 340.

In this embodiment, three packing rings 320 are provided, two packing rings 330 are provided, the three packing rings 320 are uniformly arranged along the axial direction of the central tube 430, one packing ring 330 is provided between every two packing rings 320, the packing ring 330 is slidably connected with the packing main body 310, two ends of the packing ring 330 are both abutted against the packing rings 320, the packing ring 330 is used for preventing the packing rings 320 from being stressed unevenly in the extrusion process, further, a fixing ring 340 is provided at the position of the packing ring 320 and the piston sleeve 131, the fixing ring 340 is sleeved on the surface of the packing ring 320, and the fixing ring 340 prevents the packing rings 320 from being broken in the extrusion process and simultaneously prevents the packing rings 320 from being stressed unevenly.

In an alternative embodiment, an anchoring mechanism 500 is also included; the anchoring mechanism 500 is sleeved outside the central tube 430, one end of the anchoring mechanism 500 abuts against one end of the packing main body 310, which is far away from the piston sleeve 131, the other end of the anchoring mechanism 500 is connected with the lower joint 440, and the piston sleeve 131 drives the packing main body 310 to move towards one end close to the anchoring mechanism 500 through the fixing ring 350, so that the anchoring mechanism 500 has a movement tendency that the packing main body 310 moves towards one end of the piston sleeve 131.

In this embodiment, the anchoring mechanism 500 is sleeved on the central tube 430 and the lower joint 440, one end of the anchoring mechanism 500 away from the piston sleeve 131 is clamped with the lower joint 440, the anchoring mechanism 500 is in threaded connection with the packing main body 310, and during setting, the packing main body 310 moves towards the conveying direction of high-pressure fluid relative to the central tube 430, so that the packing main body 310 extrudes the anchoring mechanism 500, and the anchoring mechanism deforms and abuts against the inner wall of the sleeve, thereby stabilizing the setting process and preventing the tubing movement of the recyclable packing device relative to the outside during setting.

In an alternative embodiment, the anchoring mechanism 500 includes slips 510, a spring 520, a slip bowl 530, and an upper cone 540; the slip cover 530 is sleeved outside the central pipe 430, the slips 510, the elastic element 520 and the upper cone 540 are positioned between the slip cover 530 and the central pipe 430, a through hole is formed in the slip cover 530, and the slips 510 can penetrate through the through hole and abut against the inner wall of the sleeve; the slips 510 are provided with a plurality of slips 510, the slips 510 are distributed at intervals along the circumferential direction of the slip cover 530, two ends of the slips 510 are provided with inclined planes, and two ends of the slips 510 are respectively connected with the upper cone 540 and the lower joint 440; the upper cone 540 is sleeved on the central pipe 430, the upper cone 540 is connected with the central pipe 430 in a sliding manner, the upper cone 540 is abutted against the packing main body 310, the packing main body 310 is used for driving the upper cone 540 to reciprocate along the axial direction of the central pipe 430 so as to enable the slips 510 to move along the direction close to the slip cover 530, two ends of the elastic member 520 are respectively abutted against the slips 510 and the slip cover 530, and the elastic member 520 has a movement tendency that the slips 510 are far away from the slip cover 530.

In this embodiment, a lower cone is disposed at one end of the lower joint 440 close to the packing main body 310, the upper cone 540 and the lower cone are disposed opposite to each other, further, a slip cover 530 is sleeved on the upper cone 540 and the lower cone, limiting protrusions are disposed at two ends of the slip cover 530, the limiting protrusions of the slip cover 530 are used for abutting against the upper cone 540 and the lower cone, further, the elastic member 520 may be selected from an arc-shaped spring plate, two ends of the arc-shaped spring plate abut against the slip 510, an arc top position of the arc-shaped spring plate abuts against an inner portion of the slip cover 530, so that the slip 510 has a movement tendency away from the slip cover 530, further, an upper cone 540 inclined surface and a lower cone inclined surface are disposed on the upper cone 540 and the lower cone, the upper cone 540 inclined surface and the lower cone inclined surface are both inclined in a direction away from the slip 510 to be close to the slip 510, correspondingly, inclined surfaces are disposed at two ends of the slip 510 close to the upper cone 540 and the lower cone, so that pack and separate when main part 310 promotes cone 540 and moves, cone 540 promotes slips 510, make slips 510 and center tube 430 separation, it should be noted that, slips 510 is kept away from the one end of center tube 430 and is provided with the bar sawtooth, the bar sawtooth is provided with a plurality ofly, a plurality of bar sawtooth are arranged on slips 510's surface along the circumferencial direction of center tube 430, correspondingly, be provided with the bar through-hole on the slips cover 530, the quantity of bar through-hole is unanimous with the quantity of bar sawtooth, the bar sawtooth can pass the bar through-hole and with sheathed tube inner wall butt, make the anchoring more firm, namely, recoverable packing device is more stable when making the seat seal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A retrievable packing device for extending into a casing to pack the casing, comprising: the sealing device comprises a sealing mechanism, an unsealing mechanism, a sealing mechanism and a central tube main body;

the base seal mechanism is sleeved on the central pipe main body and comprises a base seal pin, and the base seal mechanism is connected with the central pipe main body through the base seal pin; the base seal mechanism is provided with a communication channel with the central pipe main body, the inside of the central pipe main body is used for conveying high-pressure fluid, and the base seal mechanism is used for moving relative to the central pipe main body along the conveying direction of the high-pressure fluid under the action of the high-pressure fluid so as to cut off the base seal pin;

the sealing mechanism is sleeved on the central pipe main body, the end part of the sealing mechanism is abutted against the seat sealing mechanism, and the seat sealing mechanism is used for extruding the sealing mechanism so as to connect the sealing mechanism with a sleeve on the outer side;

the deblocking mechanism sets up on the center tube main part, the deblocking mechanism with the center tube main part is connected, the center tube main part can for the reverse movement of seat sealing mechanism along high-pressure fluid direction of delivery is with cutting off the deblocking mechanism, the center tube main part is used for driving seat sealing mechanism is along keeping away from sealing mechanism's one side motion, so that sealing mechanism separates with the sleeve pipe in the outside.

2. The retrievable packing device of claim 1, wherein the center tube body includes an upper fitting, a connecting tube, a center tube, and a lower fitting;

the deblocking mechanism is positioned between the upper joint and the connecting pipe, the upper joint is connected with the connecting pipe through the deblocking mechanism, one end, far away from the upper joint, of the connecting pipe is connected with one end of the central pipe, the other end of the central pipe is connected with one end of the lower joint, and the upper joint, the connecting pipe, the central pipe and the lower joint are communicated;

the upper joint is connected with the sealing mechanism in a sliding mode, the upper joint is used for moving along the reverse direction of the high-pressure fluid conveying direction relative to the connecting pipe so as to cut off the unsealing mechanism, and the upper joint is used for driving the sealing mechanism to move along one side far away from the sealing mechanism.

3. The retrievable packing device of claim 2, wherein the seating mechanism further comprises a piston and sleeve assembly;

the sleeve component is sleeved outside the central pipe, a sealing cavity is arranged between the sleeve component and the central pipe, the piston is located inside the sealing cavity and communicated with the central pipe through the circulation channel, the piston is connected with the sleeve component, the sleeve component is abutted to the sealing mechanism, and the central pipe is used for conveying high-pressure fluid into the sealing cavity, so that the piston drives the sleeve component to move and extrude one side of the sealing mechanism to the sealing mechanism.

4. The retrievable packing device of claim 3, wherein the sleeve assembly includes a piston sleeve, a first sleeve and a second sleeve;

the two ends of the first sleeve are respectively connected with the piston sleeve and the second sleeve, the piston sleeve and the first sleeve jointly form the sealing cavity with the central pipe, one end, far away from the first sleeve, of the piston sleeve is abutted to the sealing mechanism, one end, close to the first sleeve, of the piston sleeve is abutted to one side of the piston, and the piston extrudes the sealing mechanism through the piston sleeve;

the second sleeve is sleeved outside the upper joint, the seat seal pin is located between the second sleeve and the upper joint, two ends of the seat seal pin are connected with the second sleeve and the upper joint respectively, and the piston sleeve drives the second sleeve to move relative to the upper joint through the first sleeve so as to cut off the seat seal pin.

5. The retrievable pack-off device of claim 4, wherein the sleeve assembly further includes a locking ring;

the locking ring is located between the first sleeve and the connecting pipe, a clamping groove is formed in one side, close to the connecting pipe, of the first sleeve, the locking ring is clamped inside the clamping groove, first one-way teeth are arranged on one side, close to the connecting pipe, of the locking ring, second one-way teeth matched with the first one-way teeth are arranged on the outer side wall of the connecting pipe, the locking ring is connected with the second one-way teeth of the connecting pipe in a matched mode through the first one-way teeth, and the first one-way teeth and the second one-way teeth are used for limiting one-way movement of the locking ring along the conveying direction of high-pressure fluid so as to limit one-way movement of the first sleeve and the connecting pipe.

6. The retrievable pack-off device of claim 4, further comprising a locking block;

deblocking mechanism includes the deblocking pin, the both ends of deblocking pin respectively with the top connection with the connecting pipe is connected, the locking piece is located the top connection with between the connecting pipe, just the both ends of locking piece respectively with the top connection with the connection can be dismantled to the connecting pipe, the locking piece is used for the restriction the top connection with connecting pipe relative motion.

7. The retrievable packing device of claim 6, wherein the sealing mechanism includes a packing body, a securing ring and a packing ring;

the packing main part cover is established on the center tube, the packing snare is established in the packing main part, piston sleeve keeps away from first telescopic pot head is established in the packing main part, and with packing main part sliding connection, piston sleeve's one end with packing circle butt, gu fixed ring is located the packing main part is kept away from piston sleeve's one end, just gu fixed ring with the packing main part is connected, gu fixed ring with the packing circle is kept away from piston sleeve's one end butt, piston sleeve can be relative the packing main part slides, so that piston sleeve extrudes the packing circle.

8. The retrievable packing device of claim 7, wherein the sealing mechanism further comprises a spacer ring and a set ring;

the packing rings are arranged in a plurality, are all sleeved outside the packing main body and are arranged at intervals along the axial direction of the packing main body, the spacer ring is positioned between any two adjacent packing rings and is abutted against the packing rings;

the sizing ring is positioned between the seal ring and the piston sleeve, the sizing ring is sleeved at one end of the seal ring, and the seal ring is abutted against the piston sleeve through the sizing ring.

9. The retrievable pack-off device of claim 7, further comprising an anchoring mechanism;

anchoring mechanism cover is located the outside of center tube, anchoring mechanism's one end with seal and separate the main part and keep away from piston sleeve's one end butt, anchoring mechanism's the other end with the lower clutch is connected, piston sleeve passes through solid fixed ring drives seal and separate the main part and remove to being close to anchoring mechanism's one end, so that anchoring mechanism has the order seal and separate the main part to the motion trend that piston sleeve's one end removed.

10. The retrievable pack-off device of claim 9, wherein the anchoring mechanism includes slips, a spring, a slip cover and an upper cone;

the slip cover is sleeved outside the central tube, the slip, the elastic element and the upper cone are positioned between the slip cover and the central tube, a through hole is formed in the slip cover, and the slip can penetrate through the through hole and is abutted to the inner wall of the sleeve; the slip is provided with a plurality of slips which are distributed at intervals along the circumferential direction of the slip cover, inclined planes are arranged at two ends of each slip, and two ends of each slip are respectively connected with the upper cone and the lower connector;

go up the cone cover and establish on the center tube, go up the cone with center tube sliding connection, just go up the cone with pack apart the main part butt, pack apart the main part and be used for driving go up the cone along the axis direction reciprocating motion of center tube, so that the slips is along being close to the direction motion of slips cover, the both ends of elastic component respectively with a plurality of the slips with slips cover butt, the elastic component has and makes a plurality ofly the slips is kept away from the motion trend of slips cover.

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