CN115182699B

CN115182699B - Packer

Info

Publication number: CN115182699B
Application number: CN202210904400.XA
Authority: CN
Inventors: 李晓明
Original assignee: Qiqihar Yasheng Machinery Manufacturing Co ltd
Current assignee: Qiqihar Yasheng Machinery Manufacturing Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-04-28
Anticipated expiration: 2042-07-29
Also published as: CN115182699A

Abstract

The invention belongs to the field of underground packers, and in particular relates to a packer, which comprises an upper joint and a lower joint, wherein openings of the upper joint and the lower joint are oppositely arranged and detachably connected, one ends of the upper joint and the lower joint are respectively connected with an upper oil pipe and a lower oil pipe, a sliding assembly is slidably arranged in the lower joint, a flow dividing mechanism communicated with the upper oil pipe is arranged in the upper joint, a hydraulic cavity is formed between the flow dividing mechanism and the upper joint, the top of the sliding assembly is positioned in the hydraulic cavity, the flow dividing mechanism is used for guiding liquid to flow to the hydraulic cavity, a clamping piece is arranged on the peripheral surface of the lower joint, an elastic piece is arranged on the sliding assembly, the sliding assembly and the lower joint are connected through a limiting mechanism, and when the sliding assembly slides down to the lowest height, the sliding assembly is limited, and the deblocking mechanism is used for detachably connecting the lower joint and resetting the limiting mechanism.

Description

Packer

Technical Field

The invention belongs to the field of underground packers, and particularly relates to an improvement of a packer in structure.

Background

A packer is a device having an elastomeric sealing element and thereby sealing the annular space between the packer and the casing and isolating the production zone from the production fluid to control the production fluid, and is widely used in drilling, cementing, testing, completing and in downhole petroleum operations. The packer can be divided into a self-sealing type (code Z), a compression type (code Y), a wedge type (code X) and an expansion type (code K) according to the working principle of the packer.

For example, a Y445 series release packer is a hydraulic setting, releasing and lifting release packer, and has the characteristics of sealing and high hanging load, in the application process, a lower oil pipe below the packer is supported in a well hole, hydraulic oil is injected into an upper oil pipe above the packer, the effect of sealing a sleeve is realized by expanding a locking claw and a sealing element through hydraulic pressure, the limit of the locking claw and the sealing element is realized through a release shear pin, when other pipe fittings are required to be connected, an upper lifting handle can be removed, other pipe fittings are connected, oil pumping and other operations are carried out, and in the release stage, the release shear pin is sheared through a release lifting tool, so that the locking claw and the sealing element are reset, and the whole packer is separated from the well hole, but because the release shear pin is sheared in an irreversible process, the whole packer is invalid after the release, and is unfavorable for multiple and repeated use.

Disclosure of Invention

The invention aims to provide a packer for solving the problems in the prior art, and the technical scheme adopted by the invention is as follows:

the packer comprises an upper joint and a lower joint, wherein the openings of the upper joint and the lower joint are oppositely arranged and detachably connected, one ends of the upper joint and the lower joint are respectively connected with an upper oil pipe and a lower oil pipe, a sliding assembly is slidably arranged in the lower joint, a flow dividing mechanism communicated with the upper oil pipe is arranged in the upper joint, a hydraulic cavity is formed between the flow dividing mechanism and the upper joint, and the top of the sliding assembly is positioned in the hydraulic cavity;

the flow dividing mechanism is used for guiding liquid to flow to the hydraulic cavity so as to push the sliding assembly to slide downwards, the sliding assembly pushes the elastic piece and the clamping piece to squeeze the inner wall of the sleeve, the clamping piece is arranged on the peripheral surface of the lower joint, and the elastic piece is arranged on the sliding assembly and is positioned between the lower joint and the upper joint;

the sliding component is connected with the lower joint through a limiting mechanism, and the sliding component is limited when the sliding component slides down to the lowest height;

the device also comprises an unsealing mechanism, wherein the unsealing mechanism is used for detachably connecting the lower joint and resetting the limiting mechanism.

Further, the shunt mechanism comprises an insertion pipe, the insertion pipe is communicated with the upper oil pipe, the top of the insertion pipe is fixedly connected with the upper joint through a plurality of fixing rods, the bottom of the insertion pipe is detachably arranged in a supporting pipe and seals the supporting pipe, and a plurality of fixing rods are arranged at intervals and are positioned above the supporting pipe;

the bottom of the support tube is fixedly connected with the lower joint, the top of the support tube is positioned in the upper joint, a hydraulic cavity is formed between the peripheral surface of the support tube and the inner wall of the upper joint, and the sliding assembly is sleeved on the support tube.

Further, the plug-in pipe is connected with the supporting pipe through threads;

the sealing ball is used for being placed in the oil feeding pipe and blocking the through hole.

Further, the sliding assembly comprises a sliding pipe sleeved on the supporting pipe, the sliding pipe is arranged in the hydraulic cavity, the bottom of the sliding pipe extends out of the upper joint, and the bottom of the sliding pipe is connected with an extrusion mechanism for pushing the elastic piece and the clamping piece to extrude the inner wall of the sleeve.

Further, the extrusion mechanism comprises an upper shaft sleeve and a lower shaft sleeve, the sliding pipe, the upper shaft sleeve and the lower shaft sleeve are sleeved on the supporting pipe from top to bottom, the bottom of the sliding pipe is fixedly connected with the top of the upper shaft sleeve, and the bottom of the upper shaft sleeve is slidably connected with the lower shaft sleeve;

the top peripheral surface of the upper shaft sleeve is provided with an upper bulge, the top peripheral surface of the lower shaft sleeve is provided with a lower bulge, and the elastic piece is of an annular structure, sleeved on the upper shaft sleeve and positioned between the upper bulge and the lower bulge;

the bottom of the lower shaft sleeve is arranged in the lower joint and used for pushing the clamping piece to extrude the inner wall of the sleeve.

Further, the peripheral surface of the lower joint is provided with a plurality of limiting grooves, and the clamping pieces are arranged in the limiting grooves;

the lower shaft sleeve comprises a large-diameter part, the top of the large-diameter part is fixedly connected with a lower bulge, the bottom of the large-diameter part is arranged in the lower joint and is fixedly connected with a wedge-shaped part, one end of the clamping piece is arranged in the lower joint and is provided with a limiting part matched with the wedge-shaped part, the limiting part is arranged around the peripheral surface of the clamping piece, and the wedge-shaped part is used for pushing the limiting part to move towards the sleeve.

Further, the bottom of the wedge-shaped part is fixedly connected with a small-diameter part, the inner diameter of the small-diameter part is matched with the supporting tube, a gap is formed between the clamping piece and the peripheral surface of the supporting tube, and the small-diameter part penetrates through the gap;

the bottom of the small-diameter part is connected with a reset part, the reset part is provided with a second wedge-shaped part matched with the wedge-shaped part, the second wedge-shaped part is positioned below the clamping piece and used for pushing the clamping piece to move towards the support tube when ascending, a lower spring is abutted to the lower part of the reset part, the lower spring is sleeved on the support tube, and the bottom of the lower spring is abutted to the inner wall of the bottom of the lower joint;

an upper spring is arranged between the inner peripheral surface of the elastic piece and the upper shaft sleeve, and the upper spring is sleeved on the supporting tube.

Further, the inner diameter of the large-diameter part is larger than that of the small-diameter part, a sliding cavity is formed between the large-diameter part and the peripheral surface of the support tube, and the bottom of the upper shaft sleeve is slidably arranged in the sliding cavity.

Further, the stop gear includes the spacer pin, the slide tube is provided with radial hole, the spacer pin sets up in the radial hole, still be provided with spacing spring in the radial hole, the spacer pin is kept away from spacing spring's one end butt stay tube, be provided with on the stay tube with the locating hole of spacer pin adaptation, the locating hole is located the below in radial hole.

Further, the deblocking mechanism comprises a deblocking tube, and a deblocking sleeve is arranged at the bottom of the deblocking tube;

the sealing sleeve comprises a ring sleeve which is sleeved on the sealing tube and is in threaded connection, a mounting hole is formed in the radial direction of the ring sleeve, a reset push rod is arranged in the mounting hole, and one end of the reset push rod extends into the ring sleeve and is of a wedge-shaped structure;

the supporting tube top is provided with the draw-in groove, the top global be provided with of ring cover with the fixture block of draw-in groove adaptation, the fixture block is used for inserting in the draw-in groove to circumference is spacing the ring cover, and makes when reset push rod descends aim at the spacer pin.

The invention has the following beneficial effects: during the setting stage, hydraulic oil promotes sliding component and slides downwards, make elastic component and joint spare all support the sheathed tube inner wall tightly, by stop gear spacing on the lower joint, during the deblocking stage, demolish the upper joint, make it break away from the lower joint, then insert the intraductal with deblocking mechanism from top to bottom to connect the lower joint, simultaneously make stop gear reset, thereby make elastic component and joint spare reset, then salvage out the wellbore with whole packer through deblocking mechanism, and install the upper joint, so whole packer can be put into other wellbores immediately, in order to realize the purpose of being convenient for repeatedly used many times.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of a portion of the upper joint;

FIG. 3 is an enlarged schematic view of a portion of a slide assembly;

FIG. 4 is a schematic view of the clip in anchoring locking;

FIG. 5 is an enlarged schematic view of a portion of the slide assembly of FIG. 4;

FIG. 6 is a schematic view of the elastic member deforming the sealing sleeve;

FIG. 7 is an enlarged schematic view of a portion of the slide assembly of FIG. 6;

FIG. 8 is a schematic view of the upper connector shown disengaged;

FIG. 9 is a schematic view of the deblocking tube as it is inserted into the cannula;

FIG. 10 is a schematic diagram of the deblocking;

FIG. 11 is an enlarged schematic view of FIG. 9A;

fig. 12 is a schematic view in the direction B-B in fig. 10.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 12 of the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.

In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The packer comprises an upper joint 4 and a lower joint 5 which are oppositely arranged in an opening and detachably connected, wherein one ends of the upper joint 4 and the lower joint are respectively connected with an upper oil pipe 2 and a lower oil pipe 3, a sliding component is slidably arranged in the lower joint 5, a flow dividing mechanism communicated with the upper oil pipe 2 is arranged in the upper joint 4, a hydraulic cavity is formed between the flow dividing mechanism and the upper joint 4, and the top of the sliding component is positioned in the hydraulic cavity;

the flow dividing mechanism is used for guiding liquid to flow to the hydraulic cavity so as to push the sliding assembly to slide downwards, the sliding assembly pushes the elastic piece 8 and the clamping piece 10 to press the inner wall of the sleeve 1, the clamping piece 10 is arranged on the peripheral surface of the lower joint 5, and the elastic piece 8 is arranged on the sliding assembly and is positioned between the lower joint 5 and the upper joint 4;

the sliding component is connected with the lower joint 5 through a limiting mechanism, and the sliding component is limited when the sliding component slides down to the lowest height;

the device also comprises an unsealing mechanism, wherein the unsealing mechanism is used for detachably connecting the lower joint 5 and resetting the limiting mechanism.

Referring to fig. 1, a casing 1 is in the prior art and is arranged in a well hole, the invention is used for plugging a gap between the casing 1 and a packer, an upper joint 4 is positioned above a lower joint 5, the peripheral surfaces of the upper joint 4, the lower joint 5 and the lower joint 5 have the same outer diameters and are all in gap arrangement with the casing 1, in fig. 1, the packer is in the casing 1 and reaches a state of a set position, at the moment, the bottom of a lower oil pipe 3 is supported at the bottom of the well hole or on other packers in the well, an elastic piece 8 and a clamping piece 10 are in an initial state, and gaps between the elastic piece 8 and the casing 1 are distributed.

The upper joint 4 and the lower joint 5 are opposite one end and can be detachably connected with an upper oil pipe and a lower oil pipe respectively through a flange, screws, threads and the like, and are communicated with the upper oil pipe and the lower oil pipe respectively, the top of the upper oil pipe 2 extends out of a well hole and is used for being connected with water injection equipment and a hydraulic pump respectively, before seat sealing, the upper oil pipe 2 is connected with the water injection equipment and is used for positive and reverse flushing, and in the seat sealing process, the upper oil pipe 2 is connected with the hydraulic pump and is used for injecting liquid, namely hydraulic oil into the upper oil pipe 2.

The following describes the implementation of the invention by means of workflow in different stages:

the seat seal stage is as follows: the hydraulic pump injects hydraulic oil into the upper oil pipe 2, then injects hydraulic oil into the hydraulic cavity through the flow dividing mechanism, then pushes the sliding component to slide downwards, and compresses and deforms the elastic piece 8 and pushes the clamping piece 10, so that the elastic piece 8 and the clamping piece 10 are both abutted against the inner wall of the sleeve 1, and when the sliding component is located at the lowest stroke, the sliding component is limited on the lower joint 5 by the limiting mechanism, thus the purpose of seat sealing is finally achieved, and the seat sealing state as shown in fig. 8 and 9 is formed.

During the deblocking stage, the upper connector 4 is released, namely the upper connector 4 is removed, so that the upper connector 4 is separated from the lower connector 5 to form a state as shown in fig. 10, then the deblocking mechanism is inserted into the casing 1 from top to bottom and is connected with the lower connector 5, and meanwhile, the limiting mechanism is reset, so that the elastic piece 8 and the clamping piece 10 are reset, and then the whole packer is salvaged out of the well hole through the deblocking mechanism.

After salvaging out the ground, the deblocking mechanism is removed, and the upper joint 4 is installed, so that the whole packer can be immediately put into other wellbores because the limiting mechanism is reset at the moment, and the aim of being convenient for repeated use is fulfilled.

Further, the shunt mechanism comprises an insertion pipe 13, the insertion pipe 13 is communicated with the oil feeding pipe 2, the top of the insertion pipe is fixedly connected with the upper joint 4 through a plurality of fixing rods 14, the bottom of the insertion pipe is detachably arranged in a supporting pipe 12 and seals the supporting pipe 12, and a plurality of fixing rods 14 are arranged at intervals and are positioned above the supporting pipe 12;

the bottom of the support tube 12 is fixedly connected with the lower joint 5, the top of the support tube 12 is positioned in the upper joint 4, a hydraulic cavity is formed between the peripheral surface of the support tube 12 and the inner wall of the upper joint 4, and the sliding assembly is sleeved on the support tube 12.

As shown in FIG. 1, the upper joint and the lower joint are hollow structures, stepped cavities are symmetrically arranged in the upper joint and the lower joint, the inner diameters of opposite ends of the upper joint and the lower joint are smaller, the upper joint and the lower joint are respectively connected with an upper oil pipe and a lower oil pipe, and the inner diameters of opposite ends of the upper joint and the lower joint are larger.

The top of the fixed rods 14 is fixedly connected with the inner wall surface of the upper joint 4, a plurality of fixed rods 14 are uniformly distributed around the axis of the plug tube 13, the plug tube 13 is communicated with the upper oil tube 2, an upper annular cavity is formed between the outer peripheral surface of the plug tube 13 and the inner peripheral surface of the upper joint 4, the top of the support tube 12 is sleeved on the plug tube 13 and positioned in the upper annular cavity, a hydraulic cavity is formed between the outer peripheral surface of the support tube 12 and the inner peripheral surface of the upper joint 4, and the hydraulic cavity is annular and is arranged around the support tube 12.

The detachable connection between the support tube 12 and the plug tube 13 forms a detachable connection between the upper and lower joint.

In the concrete implementation, the hydraulic oil moves downwards from the oil feeding pipe 2, and because the supporting pipe 12 is sealed by the plug pipe 13, the hydraulic oil flows into the hydraulic cavity from the intervals among the fixed rods 14 and is positioned at the top of the sliding component, and then the sliding component is pushed to move downwards, so that a diversion effect is realized, and the hydraulic oil can correctly push the sliding component to move downwards in the seat sealing stage.

Further, the plug tube 13 is connected with the support tube 12 through threads;

the sealing ball 11 is arranged on the inner wall of the bottom of the plug tube 13, is of an arc surface structure matched with the sealing ball 11, and is provided with a through hole communicated with the supporting tube 12, and the sealing ball 11 is used for being placed into the oil feeding tube 2 and blocking the through hole.

Specifically, by rotating the upper oil pipe 2, the plug pipe 13 can be separated from the support pipe 12, so that the effect of separating the upper joint from the lower joint in the deblocking stage is achieved.

The sealing ball 11 is preferably a steel ball, and the sealing ball 11 is firstly placed into the oil feeding pipe 2 at the beginning of the seat sealing stage, and then the sealing ball 11 falls down to the bottom of the plug tube 13, as shown in fig. 2, the sealing ball 11 is attached to the bottom of the plug tube 13 to form a sealing structure, so that when hydraulic oil is injected, a through hole at the bottom of the support tube 12 can be plugged, and hydraulic oil can only pass through the intervals among the fixing rods 14.

In fig. 1, the sealing ball 11 is not put into the plug tube 13, and is in an initial state at this time, so that the operation of positive and reverse flushing can be performed, in fig. 8, after the completion of the setting, and after the upper joint 4 is removed, other pipes can be connected to the support tube 12 through threads, so that the oil pumping operation can be performed, and when the upper joint 4 is removed and other pipes are installed, the clamping piece 10 compresses the structure of the casing 1 to realize the restraint on the whole packer, and the rotation of the whole packer is avoided.

Further, the sliding assembly comprises a sliding tube 6 sleeved on the supporting tube 12, the sliding tube 6 is arranged in the hydraulic cavity, the bottom of the sliding tube 6 extends out of the upper joint 4, and the bottom of the sliding tube 6 is connected with an extrusion mechanism for pushing the elastic piece 8 and the clamping piece 10 to extrude the inner wall of the sleeve 1.

Specifically, the inner peripheral surface of the sliding tube 6 is attached to the supporting tube 12, the outer peripheral surface is attached to the upper joint 4, and sealing rings can be arranged on the upper end surface and the inner peripheral surface of the sliding tube 6 so as to improve the sealing capability and can be pushed by hydraulic oil.

Further, the extrusion mechanism comprises an upper shaft sleeve 7 and a lower shaft sleeve 9, the sliding pipe 6, the upper shaft sleeve 7 and the lower shaft sleeve 9 are sleeved on the supporting pipe 12 from top to bottom, the bottom of the sliding pipe 6 is fixedly connected with the top of the upper shaft sleeve 7, and the bottom of the upper shaft sleeve 7 is slidably connected with the lower shaft sleeve 9;

the top peripheral surface of the upper shaft sleeve 7 is provided with an upper bulge 701, the top peripheral surface of the lower shaft sleeve 9 is provided with a lower bulge 901, and the elastic piece 8 is of an annular structure, is sleeved on the upper shaft sleeve 7 and is positioned between the upper bulge and the lower bulge;

the bottom of the lower shaft sleeve 9 is arranged in the lower joint 5 and is used for pushing the clamping piece 10 to press the inner wall of the sleeve 1.

As shown in fig. 3, the upper protrusion 701 and the lower protrusion 901 are used for clamping the elastic piece 8, and the opposite sides of the upper protrusion 701 and the lower protrusion are provided with extension parts, so that a groove body with a convex cross section is formed together, the elastic piece 8 is clamped in the groove body, a limiting effect is formed, and the elastic piece 8 can be prevented from falling off.

Specifically, during the seat sealing stage, hydraulic oil pushes the sliding tube 6 to move downwards, the upper shaft sleeve 7 and the lower shaft sleeve 9 integrally move downwards, under the supporting effect of the elastic element 8, trace movement occurs between the upper shaft sleeve 7 and the lower shaft sleeve 9, the lower shaft sleeve 9 pushes the clamping piece 10 to move when moving downwards, and when the lower shaft sleeve 9 is positioned at the lowest stroke, the state shown in fig. 4 and 5 is formed, then the upper shaft sleeve 7 moves downwards again, the elastic element 8 is extruded to deform, the sleeve 1 and the sleeve 1 form a sealing structure, the state shown in fig. 6 and 7 is formed, and the seat sealing is completed.

Further, a plurality of limiting grooves are formed in the peripheral surface of the lower connector 5, and the clamping pieces 10 are arranged in the limiting grooves;

the lower shaft sleeve 9 comprises a large-diameter portion 902, the top of the large-diameter portion 902 is fixedly connected with a lower protrusion 901, the bottom of the large-diameter portion 902 is arranged in the lower joint 5 and is fixedly connected with a wedge-shaped portion 903, one end of the clamping piece 10 is arranged in the lower joint 5 and is provided with a limiting portion 100 matched with the wedge-shaped portion 903, the limiting portion 100 is arranged around the peripheral surface of the clamping piece 10, and the wedge-shaped portion 903 is used for pushing the limiting portion 100 to move towards the sleeve 1.

As shown in fig. 3, the upper joint and the lower joint are arranged at intervals, and an elastic piece 8 is arranged in the interval between the upper joint and the lower joint, namely, a part of the upper shaft sleeve 7 and the lower shaft sleeve 9 is arranged in the interval between the upper joint and the lower joint.

The lower sleeve 9 comprises a lower bulge 901, a large diameter part 902, a wedge-shaped part 903, a small diameter part 905 and a reset part 904 from top to bottom in sequence, and in the initial state of the packer, i.e. in fig. 3, the wedge-shaped part 903 is positioned above the clamping piece 10, the inclined surface of the wedge-shaped part 903 faces the clamping piece 10, and when the lower sleeve 9 moves downwards, the wedge-shaped part 903 presses and pushes the clamping piece 10 to move towards the casing 1.

Further, the bottom of the wedge-shaped portion 903 is fixedly connected with a small-diameter portion 905, the inner diameter of the small-diameter portion 905 is adapted to the support tube 12, a gap is formed between the clamping member 10 and the circumferential surface of the support tube 12, and the small-diameter portion 905 passes through the gap;

the bottom of the small diameter portion 905 is connected with a reset portion 904, the reset portion 904 is provided with a second wedge portion adapted to the wedge portion 903, the second wedge portion is located below the clamping piece 10, so as to push the clamping piece 10 to move towards the support tube 12 when ascending, a lower spring 19 is abutted to the lower portion of the reset portion 904, the lower spring 19 is sleeved on the support tube 12, and the bottom of the lower spring is abutted to the inner wall of the bottom of the lower joint 5;

an upper spring 18 is arranged between the inner peripheral surface of the elastic piece 8 and the upper shaft sleeve 7, and the upper spring 18 is sleeved on the supporting tube 12.

The reset portion 904 is arranged on the outer peripheral surface of the small-diameter portion 905 and is attached to the inner wall of the lower joint 5, the second wedge-shaped portion is located at the top of the reset portion 904, two sides of the limiting portion 100 on the clamping piece 10 are inclined surfaces and are respectively matched with the wedge-shaped portion 903 and the second wedge-shaped portion, the limiting portion has a limiting effect, the clamping piece 10 can be prevented from being separated from the limiting groove, a gap is formed when the limiting portion 100 is abutted against the inner wall of the lower joint 5, and the clamping piece 10 is pushed away from the sleeve 1 from the gap.

When the seat seal is completed, the reset part 904 presses the lower spring 19 downwards, the upper shaft sleeve 7 presses the upper spring 18, the upper spring 18 and the lower spring 19 are compressed, in the unsealing stage, when the limiting mechanism is reset, the upper spring 18 and the lower spring 19 rebound simultaneously, the upper shaft sleeve and the lower shaft sleeve move upwards to reset to return to the initial state in fig. 1, in the process of moving the lower shaft sleeve 7 upwards, the second wedge-shaped part on the reset part 904 pushes the clamping part 10 to reset, the elastic part 8 is deformed under the action of self elasticity, so that the invention can realize the reset of the elastic part 8 and the clamping part 10 and the reset of the whole sliding assembly upwards in the unsealing stage, and then the upper joint 1 is installed again, so that the invention can be put into use again.

In addition, as shown in fig. 3, the lower protrusion 901, the large diameter portion 902, the wedge portion 903 and the small diameter portion 905 may be integrally formed or fixedly connected, the reset portion 904 and the small diameter portion 905 may be detachably connected, and may be connected by threads, threads or the like, the top end surface of the lower joint 5 is connected with the fixing ring 501 by threads, the inner diameter of the fixing ring 501 is smaller than the inner diameter of the lower joint 5, the top outer diameter of the wedge portion 903 is adapted to the lower joint 5, so as to realize a limit effect on the wedge portion 903, and restrict the maximum travel of the upward movement of the lower shaft sleeve 7, and the fixing ring 501 is located under the lower protrusion 901 to restrict the maximum travel of the downward movement of the lower shaft sleeve 7.

If 1, the lower joint 5 comprises a connecting part and a pipe part, the pipe part is of a hollow cylinder structure, the bottom of the pipe part is detachably connected with the connecting part and can be connected in a screw, thread or the like mode, the top of the lower oil pipe 3 is connected with the bottom of the connecting part, and the top of the connecting part is fixedly connected with the bottom of the supporting pipe 12.

The problem of mounting the clamping member 10 and the lower bushing 7 is thus solved by the detachable connection of the lower joint 5, the fixing ring 501, the connecting part, the resetting part 904.

Further, the inner diameter of the large diameter portion 902 is larger than the inner diameter of the small diameter portion 905, a sliding cavity 702 is formed between the large diameter portion 902 and the circumferential surface of the support tube 12, and the bottom of the upper shaft sleeve 7 is slidably disposed in the sliding cavity 702.

As shown in fig. 3, the sliding chamber 702 restricts the maximum downward stroke of the upper sleeve 7, and the maximum upward stroke of the upper sleeve 7 is restricted by the upper joint 4, i.e., the bottom end surface of the upper joint 4 is located directly above the upper protrusion 701.

Further, the limiting mechanism comprises a limiting pin 15, the sliding tube 6 is provided with a radial hole, the limiting pin 15 is arranged in the radial hole, a limiting spring 16 is further arranged in the radial hole, one end of the limiting pin 15, which is far away from the limiting spring 16, is abutted to the supporting tube 12, a positioning hole 17 which is matched with the limiting pin 15 is arranged on the supporting tube 12, and the positioning hole 17 is positioned below the radial hole.

As shown in fig. 2, specifically, one end of the limiting pin 15 is fixedly connected with the limiting spring 16, the other end of the limiting spring 16 is fixedly connected with the inner wall of the radial hole, the radial hole is in a blind hole structure, the opening faces the supporting tube 12, and a plurality of limiting pins 15 are arranged in the circumferential direction of the sliding tube 6.

In the seat sealing stage, the limiting pin 15 moves downwards, and when the limiting pin is aligned and concentric with the positioning hole 17, the limiting spring 16 pushes the limiting pin 15 to enter the positioning hole 17, so that the effect of locking the sliding tube 6 is realized.

Regarding positioning of the limiting pin 15, in a specific implementation, a protrusion or a chute may be provided on the inner circumferential surface of the sliding tube 6, and a corresponding chute or protrusion may be provided on the supporting tube 12, so as to restrict circumferential rotation of the sliding tube 6 and realize positioning of the limiting pin 15 and the positioning hole 17.

Further, the deblocking mechanism comprises a deblocking tube 20, and a deblocking sleeve 21 is arranged at the bottom of the deblocking tube 20;

the deblocking sleeve 21 comprises a ring sleeve 210 sleeved on the deblocking tube 20 and in threaded connection, a mounting hole is radially formed in the ring sleeve 210, a reset push rod 212 is arranged in the mounting hole, and one end of the reset push rod 212 extends into the ring sleeve 210 and is of a wedge-shaped structure;

the top of the supporting tube 12 is provided with a clamping groove, the top circumferential surface of the ring sleeve 210 is provided with a clamping block 211 matched with the clamping groove, and the clamping block 211 is used for being inserted into the clamping groove to circumferentially limit the ring sleeve 210 and align the limiting pin 15 when the reset push rod 212 descends.

Referring to fig. 9 and 10, the deblocking tube 20 moves downward and is concentric with the supporting tube 12, and when the clamping block 211 is clamped in the clamping groove, the deblocking tube 20 starts to rotate, the deblocking tube 20 moves downward and pushes the reset push rod 212 to move towards the limiting pin 15, so that the limiting pin 15 is pushed out of the positioning hole 17, the end of the reset push rod 212 is flush with the opening of the positioning hole 17, then the upper spring 18 and the lower spring 19 rebound, the sliding assembly resets, and at the moment, the reset push rod 212 forms a supporting function, the whole packer can be taken out by pushing the deblocking tube 20 upward, and the linear movement of the deblocking tube 20 can enable the reset push rod 212 to be effectively aligned with the limiting pin 15, so that the packer is suitable for a vertical section in a well bore.

Specifically, in order to avoid the circumferential rotation of the reset push rod 212, a groove can be formed in the side surface of the reset push rod 212, a convex part is formed in the inner wall of the mounting hole, the convex part is clamped in the groove to achieve the effect of restraining the circumferential rotation of the reset push rod 212, the bottom of the unsealing pipe 20 is of a conical structure and is matched with the wedge-shaped structure of the reset push rod 212, and the reset push rod 212 is conveniently pushed to move.

After the deblocking tube 20 is removed, the reset push rod 212 is pushed to reset, and the reset push rod 212 and the mounting hole can be in interference fit, so as to prevent the reset push rod 212 from falling off.

In addition, the terminal surface of spacer 15 is spherical structure, and it breaks away from locating hole 17 of being convenient for, and the top fixed connection joint ring 22 of stay tube 12, joint ring 22 top sets up a plurality of draw-in grooves at its circumference, and fixture block 211 corresponds sets up a plurality of, and during the concrete implementation, can also set up corresponding detection switch, sensor etc. on the buckle 211 to be used for detecting the condition of putting in place of fixture block 211.

The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the design of the present invention.

Claims

1. A packer, characterized in that: the hydraulic oil pipe comprises an upper joint (4) and a lower joint (5) which are oppositely arranged and detachably connected, wherein one ends of the upper joint and the lower joint are respectively connected with an upper oil pipe (2) and a lower oil pipe (3), a sliding component is slidably arranged in the lower joint (5), a flow dividing mechanism which is communicated with the upper oil pipe (2) is arranged in the upper joint (4), a hydraulic cavity is formed between the flow dividing mechanism and the upper joint (4), and the top of the sliding component is positioned in the hydraulic cavity;

the flow dividing mechanism is used for guiding liquid to flow to the hydraulic cavity so as to push the sliding assembly to slide downwards, the sliding assembly pushes the elastic piece (8) and the clamping piece (10) to press the inner wall of the sleeve (1), the clamping piece (10) is arranged on the peripheral surface of the lower joint (5), and the elastic piece (8) is arranged on the sliding assembly and is positioned between the lower joint (5) and the upper joint (4);

the sliding component is connected with the lower joint (5) through a limiting mechanism, and the sliding component is limited when the sliding component slides down to the lowest height;

the device also comprises an unsealing mechanism, wherein the unsealing mechanism is used for detachably connecting the lower joint (5) and resetting the limiting mechanism;

the diversion mechanism comprises an insertion pipe (13), the insertion pipe (13) is communicated with the upper oil pipe (2), the top of the insertion pipe is fixedly connected with the upper joint (4) through a plurality of fixing rods (14), the bottom of the insertion pipe is detachably arranged in a supporting pipe (12) and seals the supporting pipe (12), and a plurality of fixing rods (14) are arranged at intervals and are positioned above the supporting pipe (12);

the bottom of the supporting tube (12) is fixedly connected with the lower joint (5), the top of the supporting tube (12) is positioned in the upper joint (4), the hydraulic cavity is formed between the peripheral surface of the supporting tube (12) and the inner wall of the upper joint (4), and the sliding assembly is sleeved on the supporting tube (12);

the sliding assembly comprises a sliding pipe (6) sleeved on the supporting pipe (12), the sliding pipe (6) is arranged in the hydraulic cavity, the bottom of the sliding pipe extends out of the upper joint (4), and the bottom of the sliding pipe (6) is connected with an extrusion mechanism for pushing the elastic piece (8) and the clamping piece (10) to extrude the inner wall of the sleeve (1);

the extrusion mechanism comprises an upper shaft sleeve (7) and a lower shaft sleeve (9), the sliding pipe (6), the upper shaft sleeve (7) and the lower shaft sleeve (9) are sleeved on the supporting pipe (12) from top to bottom, the bottom of the sliding pipe (6) is fixedly connected with the top of the upper shaft sleeve (7), and the bottom of the upper shaft sleeve (7) is slidably connected with the lower shaft sleeve (9);

the top peripheral surface of the upper shaft sleeve (7) is provided with an upper bulge (701), the top peripheral surface of the lower shaft sleeve (9) is provided with a lower bulge (901), and the elastic piece (8) is of an annular structure, is sleeved on the upper shaft sleeve (7) and is positioned between the upper bulge and the lower bulge;

the bottom of the lower shaft sleeve (9) is arranged in the lower joint (5) and is used for pushing the clamping piece (10) to extrude the inner wall of the sleeve (1);

the periphery of the lower joint (5) is provided with a plurality of limit grooves, and the clamping pieces (10) are arranged in the limit grooves;

the lower shaft sleeve (9) comprises a large-diameter portion (902), the top of the large-diameter portion (902) is fixedly connected with a lower protrusion (901), the bottom of the large-diameter portion is arranged in the lower joint (5) and is fixedly connected with a wedge-shaped portion (903), one end of the clamping piece (10) is arranged in the lower joint (5), a limiting portion (100) matched with the wedge-shaped portion (903) is arranged, the limiting portion (100) is arranged around the peripheral surface of the clamping piece (10), and the wedge-shaped portion (903) is used for pushing the limiting portion (100) to move towards the sleeve (1);

the bottom of the wedge-shaped part (903) is fixedly connected with a small-diameter part (905), the inner diameter of the small-diameter part (905) is matched with the supporting tube (12), a gap is formed between the clamping piece (10) and the peripheral surface of the supporting tube (12), and the small-diameter part (905) penetrates through the gap;

the bottom of the small-diameter part (905) is connected with a reset part (904), the reset part (904) is provided with a second wedge-shaped part matched with the wedge-shaped part (903), the second wedge-shaped part is positioned below the clamping piece (10) so as to push the clamping piece (10) to move towards the support tube (12) when ascending, a lower spring (19) is abutted to the lower part of the reset part (904), the lower spring (19) is sleeved on the support tube (12), and the bottom is abutted to the inner wall of the bottom of the lower joint (5);

an upper spring (18) is arranged between the inner peripheral surface of the elastic piece (8) and the upper shaft sleeve (7), and the upper spring (18) is sleeved on the supporting tube (12);

the inner diameter of the large-diameter part (902) is larger than that of the small-diameter part (905), a sliding cavity (702) is formed between the large-diameter part and the peripheral surface of the supporting tube (12), and the bottom of the upper shaft sleeve (7) is slidably arranged in the sliding cavity (702);

the limiting mechanism comprises a limiting pin (15), the sliding pipe (6) is provided with a radial hole, the limiting pin (15) is arranged in the radial hole, a limiting spring (16) is further arranged in the radial hole, one end, away from the limiting spring (16), of the limiting pin (15) is abutted to a supporting pipe (12), a positioning hole (17) matched with the limiting pin (15) is formed in the supporting pipe (12), and the positioning hole (17) is located below the radial hole;

the deblocking mechanism comprises a deblocking tube (20), and a deblocking sleeve (21) is arranged at the bottom of the deblocking tube (20);

the deblocking sleeve (21) comprises a ring sleeve (210) sleeved on the Jie Fengguan (20) and in threaded connection, a mounting hole is formed in the radial direction of the ring sleeve (210), a reset push rod (212) is arranged in the mounting hole, and one end of the reset push rod (212) extends into the ring sleeve (210) and is of a wedge-shaped structure;

the top of the supporting tube (12) is provided with a clamping groove, the top peripheral surface of the ring sleeve (210) is provided with a clamping block (211) matched with the clamping groove, the clamping block (211) is used for being inserted into the clamping groove to circumferentially limit the ring sleeve (210), and the reset push rod (212) is aligned with the limiting pin (15) when being lowered.

2. A packer according to claim 1, characterized in that: the plug-in pipe (13) is connected with the supporting pipe (12) through threads;

still include sealing ball (11), grafting pipe (13) bottom inner wall be with the cambered surface structure of sealing ball (11) adaptation, and be provided with the intercommunication the through-hole of stay tube (12), sealing ball (11) are used for following put into in oil pipe (2), and shutoff the through-hole.