CN112696170A

CN112696170A - Oil jacket safety packer with anchoring function and method

Info

Publication number: CN112696170A
Application number: CN201911010811.9A
Authority: CN
Inventors: 魏新晨; 郭林园; 张剑; 贺启强; 田俊; 蔡增田; 申兴哲; 任从坤; 聂文龙; 石琼
Original assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Research Institute of Petroleum Engineering Shengli Co
Priority date: 2019-10-23
Filing date: 2019-10-23
Publication date: 2021-04-23
Anticipated expiration: 2039-10-23
Also published as: CN112696170B

Abstract

The invention discloses an oil jacket safety packer with anchoring and a method, comprising the following steps: the large-discharge well washing control device is sleeved outside the central pipe, and the upper end of the large-discharge well washing control device is connected with a first hydraulic control pipeline; the packer setting, anchoring and deblocking device is sleeved outside the central pipe, and the upper end of the packer setting, anchoring and deblocking device is connected with a second hydraulic control pipeline. The invention can not only continuously provide the setting anchoring when the setting hydraulic control pipeline has no pressure, but also realize the opening and closing of a large-displacement well flushing channel through the well flushing hydraulic control pipeline.

Description

Oil jacket safety packer with anchoring function and method

Technical Field

The invention relates to the technical field of oil pipe sleeve annular safety protection devices, in particular to an oil sleeve safety packer with an anchoring function and a method.

Background

In view of the severe environmental requirements at sea and the transient, catastrophic and irreversibility of emergency situations, the Chengli Chengqingdao oilfield requires that the tubing-casing annulus of the injection well must be used with safety control tools, which should have the functions of sealing, anchoring and flushing.

Application No.: 201420015639.2, filing date: 2014-01-11 discloses an oil jacket safety protector, including the barrel structure that top-down is formed by top connection, center tube, lower clutch connection, the barrel structure outside is provided with the body, the outside of body is provided with the packing element and acts on the seat of packing element below and unseals the device, the body upper end still is connected the well-flushing controlling means who overlaps in the barrel structure outside equally, it includes the push rod cover that overlaps in the body outside and pushes up in the packing element bottom, the overcoat that overlaps in the push rod cover outside to sit the unseals the device, form the annular space between push rod cover and the overcoat, be equipped with the piston in the annular space, be provided with the catch in the annular space and the top of piston, this catch is fixed on the catch fixed sleeve, catch and push rod cover are detained through horse tooth and are connected. The utility model discloses can realize that oil jacket annular space passageway closes when the unexpected pressure release of emergency liquid accuse pipeline, the requirement that oil jacket annular space passageway was opened when can satisfying big discharge backwashing well again.

The Chengli Chengqu island oil field in earlier stage designs and has used an oil jacket safety protector (ZL 201420015639.2) to the condition that lacks oil pipe and intercannula safety protection instrument, this protector can realize the annular long-term sealing of oil pipe sleeve and can realize washing the well through the hydraulic control pipeline pressurization that is connected to ground when washing the well, the problem of waiting to solve promptly at that time is solved, but this protector does not have anchoring structure instrument both ends pressure differential and becomes invalid easily when big, and the unreasonable condition of not closing after opening of existence of well washing structural design, bring very big potential safety hazard for the control of on-the-spot well.

Application No.: 201620589039.6, filing date: 2016-06-15 discloses an anchoring type ground liquid accuse safety packer, including interior center tube, outer center tube, seat anchor, well-flushing device, outer center tube pipe box is in the inner center tube outside, form well-flushing annular passageway between interior center tube and the outer center tube, outer center tube both sides are furnished with the brill passageway of joining in marriage respectively axially, one is hydraulic pressure pipeline and suppresses the seat and seal the passageway, another is well-flushing valve hydraulic control passageway, above-mentioned two join in marriage the drill passageway upper end and correspond respectively put into one and block up, outer center tube outside is provided with the seat anchor that corresponds hydraulic pressure pipeline and suppresses the seat and seal the passageway, outer center tube below is provided with the well-flushing device that corresponds well-flushing valve hydraulic control passageway. The utility model discloses a set up solitary hydraulic pressure pipeline and beat and press and sit and seal passageway and well-flushing valve hydraulic control passageway and realize the seat of packer respectively and seal, anchoring and big discharge backwash well function, make safe packer be in auto-lock seat throughout after the work and seal and anchoring state.

Application No.: 00213730.5, filing date: 2000-03-15 an anchored washable well packer having an anchoring device comprising a cone, slips, slip sleeve and shear pins, which is connected to the sealing element and locking mechanism of the packer. The packer can effectively control the phenomenon that the packer longitudinally moves, avoid the damage of a rubber sleeve, improve the sealing pressure difference and ensure safe and reliable layered water injection. The packer also has a well backwashing function, a balance cavity is arranged in a well backwashing component, and the packer is automatically closed during water injection.

Application No.: 201820440366.4, filing date: 2018-03-30 discloses a bidirectional automatic anchor for a well-flushing protective oil layer, which comprises a main body, outer sleeves, tooth blocks, a one-way rubber sleeve, an upper joint, a rubber sleeve seat, a steel ball, a lower joint, a gasket and a water outlet hole, wherein the main body is provided with the water outlet hole; a gasket is sleeved between the one-way rubber cylinder and the rubber cylinder seat, so that the one-way rubber cylinder is more properly connected with the rubber cylinder seat; the lower joint is arranged at the other end of the main body, and a steel ball is filled in the lower joint.

Application No.: 201220024378.1, filing date: 2012-01-19 relates to a self-anchoring washable well packer, which consists of a pipe column part, an anchoring part, a well washing part, a packing assembly, a clamping part and a righting part, wherein the pipe column part consists of a central pipe and an inner pipe penetrating into the central pipe, and the anchoring part, the well washing part, the clamping part and the righting part are sequentially sleeved on the central pipe. The packer has the advantages of simple structure, reliable work and stable performance, can meet the requirements of leakage detection, channeling detection, pressure test and lower pressure bearing of the plugging anchoring pipe column of the oil-water well, and can realize the requirement of unsealing the reverse well flushing.

The technical solutions of the above-disclosed technologies, the technical problems to be solved, and the advantageous effects thereof are all different from the present invention, and no technical inspiration exists in the above-disclosed technical documents for more technical features, technical problems to be solved, and advantageous effects thereof.

Disclosure of Invention

The invention aims to provide an oil jacket safety packer with an anchor and a method, which can continuously provide the setting anchor when a setting hydraulic control pipeline has no pressure, and can realize the opening and closing of a large-displacement well flushing channel through a well flushing hydraulic control pipeline.

In order to achieve the purpose, the invention adopts the following technical scheme that the oil jacket safety packer with the anchoring function comprises:

the large-discharge well washing control device is sleeved outside the central pipe, and the upper end of the large-discharge well washing control device is connected with a first hydraulic control pipeline;

the packer setting, anchoring and deblocking device is sleeved outside the central pipe, and the upper end of the packer setting, anchoring and deblocking device is connected with a second hydraulic control pipeline.

Further, the large discharge well-flushing control device comprises:

the upper end of the backwashing sleeve is connected with a piston sleeve, a piston is arranged in the piston sleeve, a spring sleeve is arranged at the lower end of the backwashing sleeve, and a well-flushing communication hole which is radially communicated is formed in the middle of the backwashing sleeve;

the annular well-flushing device comprises a sliding sleeve, wherein a first annular well-flushing channel is formed between the outer wall of the sliding sleeve and the inner wall of a backwashing sleeve, the upper end face of the sliding sleeve is in contact with a piston push-pull sleeve, the piston push-pull sleeve is sleeved at the lower end of a piston, a vulcanization sealing element is installed on the outer wall of the lower end of the sliding sleeve and can plug the lower end opening of the first annular well-flushing channel, and the inner wall of the upper end of the backwashing sleeve and the.

Further, the large discharge well-flushing control device comprises:

the spring is arranged in the spring sleeve, a second annular well washing channel is formed between the inner wall of the spring sleeve and the outer wall of the central pipe, the inner diameter of the spring sleeve is larger than the outer diameter of the lower end of the sliding sleeve, the upper end of the spring is connected with the lower end face of the sliding sleeve through an upper spring backing ring, and the lower end of the spring is limited on an annular step formed in the inner wall of the spring sleeve through a lower spring backing ring.

Furthermore, the backwashing sleeve is connected and fixed with the piston sleeve through the piston sleeve rotation-proof nail, and the backwashing sleeve is connected and fixed with the spring sleeve through the spring sleeve rotation-proof nail.

Furthermore, the upper end of the piston sleeve is connected with the outer wall of the lower end of the upper joint, the upper end of the central tube is connected with the inner wall of the lower end of the upper joint, the upper joint is provided with an eccentric hydraulic control channel, an upper port of the hydraulic control channel is connected with a first hydraulic control pipeline, the lower end of the hydraulic control channel is communicated with the upper end of an inner cavity of the piston sleeve, and the piston sleeve and the upper joint are further fixedly connected through an upper joint anti-.

Further, the packer setting, anchoring and unsetting device comprises:

the pressure transmission cylinder is sleeved outside the central pipe, a third annular well washing channel is formed between the inner wall of the pressure transmission cylinder and the outer wall of the central pipe, the upper end of the third annular well washing channel is communicated with a second annular well washing channel of a spring sleeve of the large-discharge well washing control device, the upper end of the pressure transmission cylinder is connected with the lower end of the spring sleeve of the large-discharge well washing control device, the pressure transmission cylinder is further provided with an eccentric pressure transmission channel, and the upper port of the pressure transmission channel is connected with a second hydraulic control pipeline;

the packer setting device is sleeved outside the pressure transmission cylinder;

the anchoring and unsealing device is sleeved outside the pressure transmission cylinder, and the upper end of the anchoring and unsealing device is connected with the lower end of the packer setting device.

Further, the packer setting device comprises:

the rubber cylinders are sleeved on the outer wall of the pressure transmission cylinder, at least one rubber cylinder is arranged, and when the number of the rubber cylinders is more than or equal to two, a spacing ring is arranged between every two rubber cylinders;

the lower end of the upper retaining ring is axially limited to the upper end face of the rubber cylinder;

the double-piston mechanism is arranged between the outer sleeve and the central tube, and the middle part of the double-piston mechanism is communicated with the pressure transmission channel through a radial pressure transmission hole formed in the pressure transmission cylinder;

and the upper end surface of the push rod sleeve props against the bottom end of the rubber barrel, and the lower end of the push rod sleeve is connected with a double-piston mechanism.

Further, the double piston mechanism includes:

the upper piston is arranged between the outer sleeve and the central tube, and the upper end of the upper piston is connected with the lower end of the push rod sleeve;

a lower piston disposed between the outer jacket and the center tube;

and the pressure transmission C-shaped ring is placed between the lower end surface of the upper piston and the upper end surface of the lower piston, and the notch of the pressure transmission C-shaped ring faces the radial pressure transmission hole of the pressure transmission cylinder, so that liquid of the pressure transmission channel enters the notch of the pressure transmission C-shaped ring, and pressure is simultaneously applied to the upper piston and the lower piston.

Furthermore, the inner wall of the upper end of the outer sleeve is connected with a lock ring fixing sleeve through threads, and the lock ring fixing sleeve is fixedly connected with the push rod sleeve through a setting shear pin.

Furthermore, a lock ring is installed on the inner wall of the outer sleeve, and the inner wall of the lock ring is connected with the outer wall of the push rod sleeve in a button type mode through a horse tooth.

Furthermore, the upper end of the pressure transmission cylinder is connected with the lower end of the spring sleeve through an anti-rotation nail of the pressure transmission cylinder.

Further, the anchoring deblocking device comprises:

the slips are arranged in the slip grooves of the slip sleeve;

the upper end of the upper cone extends into the outer sleeve of the packer setting device and corresponds to a lower piston in the outer sleeve, the conical surface at the lower end of the upper cone acts on the upper end of the plate spring, and the outer wall of the middle part of the plate spring abuts against the inner wall of the slip;

and the upper end of the lower cone is a conical surface and acts on the lower end of the plate spring.

Furthermore, the slip sleeve is connected with the upper cone through the anchoring shear pin, and the slip sleeve is connected with the lower cone through the slip sleeve anti-rotation pin.

Furthermore, the inner wall of the slip sleeve and the outer wall of the upper cone are provided with axial limiting tables at the same time.

Further, the lower end of the slip sleeve is connected with a lower retaining sleeve.

Furthermore, the lower end of the lower cone is connected with a deblocking shear ring sleeve, and a deblocking shear ring is arranged between the inner wall of the deblocking shear ring sleeve and the outer wall of the pressure transfer cylinder.

Furthermore, the upper end of the upper cone is fixedly connected with the outer sleeve through an outer sleeve anti-rotation nail.

Furthermore, the lower end of the lower cone is connected and fixed with the deblocking shear ring sleeve through the deblocking shear ring sleeve anti-rotation nail and then is jointly positioned on the anti-blocking C-shaped ring.

In order to achieve the purpose, the invention adopts the following technical scheme that the use method of the oil jacket safety packer with the anchoring function comprises the following steps:

the large-discharge well-washing control device opens a vulcanized sealing piece attached to the front sliding sleeve and tightly contacts with the backwashing sleeve to form a sealing surface, and water flow at the lower end of the tool cannot flow upwards from the backwashing sleeve through an annular water channel formed by the central pipe, the pressure transmission cylinder and the spring sleeve;

before the packer is put into a well, a pipeline is connected to a joint at the upper end of an upper joint through an NPT joint, a piston is pushed after the ground pressurizes a hydraulic control pipeline, the piston drives a piston push-pull sleeve to push a sliding sleeve downwards, a vulcanization sealing element attached to the sliding sleeve is separated from a backwashing sleeve when the sliding sleeve overcomes the upper jacking force of a spring to move downwards, and water flow at the lower end of the tool goes upwards through an annular water channel formed by a central pipe, a pressure transmission cylinder and the spring sleeve and flows out through a water flow switch of the vulcanization sealing element and the backwashing sleeve;

when the ground releases pressure to the hydraulic control pipeline, the spring acts on the upper cushion ring of the spring to push the sliding sleeve to move upwards, the vulcanized sealing element attached to the sliding sleeve and the backwashing sleeve form a sealing surface again, and the well washing channel is closed.

Further, before the packer is put into the well, a pipeline is connected to a joint at the upper end of the pressure transmission cylinder through an NPT joint, and after the hydraulic control pipeline is pressurized on the ground, hydraulic pressure pushes the upper piston and the lower piston to move upwards and downwards through a pressure transmission hole reserved in the pressure transmission cylinder; the lower piston drives the outer sleeve when moving downwards, the outer sleeve is connected with the locking ring fixing sleeve through threads, when the pushing force is large enough to cut off the setting shear pin, the upper piston moves upwards to push the push rod sleeve to compress the rubber sleeve to play a setting role, the lower piston can also push the upper vertebral body, when the downward pushing piston force cuts off the anchoring shear pin, the upper vertebral body continues to move downwards, and the slips protrude out under the action of the plate spring to finish anchoring;

after the outer sleeve follows the lower cone to go down, the outer sleeve and the push rod sleeve are locked with each other due to the action of the locking ring, the outer sleeve cannot go up relative to the push rod sleeve, and therefore the upper cone cannot go up even if the lower piston goes up again, namely, the anchoring cannot be unsealed.

Furthermore, the packer deblocking is realized by a lifting tool, the slips is anchored on the wall of the casing, the slips downwards pushes a lower cone after the tool is lifted, the lower cone pushes a deblocking shear ring sleeve, after the deblocking shear ring inside the deblocking shear ring is sheared, the deblocking shear ring sleeve and the lower cone are released downwards, the slips lose the extrusion of a plate spring and retract radially, and the tool deblocking and the anchoring are removed.

Compared with the prior art, the invention has the following beneficial effects:

the structure that the single piston is connected with the piston push-pull sleeve to push the sliding sleeve is designed, the variable volume of the hydraulic cavity is effectively reduced, and the time for opening and closing the well-flushing channel is greatly shortened.

The length of the sliding sleeve is shortened, and the backwashing sleeve is adopted for righting, so that the possibility of clamping in the moving process of the sliding sleeve is greatly reduced, the condition that a well washing channel cannot be opened or closed is avoided, and the reliability of the tool is improved.

A pressure transmission C-shaped ring is arranged between the upper piston and the lower piston, so that the upper piston and the lower piston are effectively positioned accurately, and meanwhile, the pressure transmission C-shaped ring is adopted to realize accurate thrust control on the pistons on the two sides.

The design is known and is sealed the ring structure of cutting, has effectively improved packer deblocking pressure control, avoids later stage operation to delay the time.

The anchoring mechanism is added, the anchoring sealing is realized, the zero set pressure water injection is ensured, and the safety control requirement of the Chengli Chengqing island oil field is met.

In order to facilitate the tool machining and simultaneously reduce the outer diameter of the tool as much as possible, the invention adopts a multi-circle center structure design, and the large-discharge well-flushing control device and the central pipe are in the same circle center, namely a concentric structure; the seat seal anchor unsealing device and the central tube are not in the same circle center, namely an eccentric structure.

Drawings

FIG. 1 is a schematic structural diagram of an oil jacket safety packer with an anchor according to the invention

FIG. 2 is a schematic diagram of the upper structure of the present invention;

FIG. 3 is a schematic diagram of a middle stage of the present invention;

FIG. 4 is a schematic view of the lower structure of the present invention;

fig. 5 is a partially enlarged view of the anti-seize C-ring.

In the figure, an upper joint 1, a central tube 2, an upper joint anti-rotation nail 3, a check ring 4, an O-shaped ring 5, a piston 6, a piston push-pull sleeve 7, a piston sleeve 8, a backwashing sleeve 9, a piston sleeve anti-rotation nail 10, a sliding sleeve 11, a spring sleeve 12, a spring sleeve anti-rotation nail 13, a vulcanized sealing piece 14, a spring upper backing ring 15, a spring 16, a spring lower backing ring 17, a pressure transfer cylinder 18, a pressure transfer cylinder anti-rotation nail 19, a rubber cylinder 20, a spacer ring 21, a push rod sleeve 22, a setting shear nail 23, a locking ring fixing sleeve 24, an outer sleeve 25, a locking ring 26, an upper piston 27, a pressure transfer C-shaped ring 28, a lower piston 29, an outer sleeve anti-rotation nail 30, an upper cone 31, a slip sleeve 32, an anchoring shear nail 33, a slip 34, a plate spring 35, a lower cone 36, a slip sleeve anti-rotation nail 37, a lower retaining sleeve 38, a deblocking shear 39, an anti-rotation nail 40, an anti-blocking C-rotation ring 41 and a deblocking shear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1 to 5, the present invention provides a technical solution: an oil jacket safety packer with an anchor, comprising:

the large-discharge well washing control device is sleeved outside the central pipe 2, and the upper end of the large-discharge well washing control device is connected with a first hydraulic control pipeline;

Further, the large discharge well-flushing control device comprises:

the upper end of the backwashing sleeve is connected with a piston sleeve 8, a piston 6 is arranged in the piston sleeve, a spring sleeve 12 is arranged at the lower end of the backwashing sleeve, and the middle part of the backwashing sleeve is provided with a well-flushing communication hole which is radially communicated;

the annular well-flushing device comprises a sliding sleeve 11, wherein a first annular well-flushing channel is formed between the outer wall of the sliding sleeve and the inner wall of a backwashing sleeve, the upper end face of the sliding sleeve is in contact with a piston push-pull sleeve 7, the piston push-pull sleeve is sleeved at the lower end of a piston 6, a vulcanization sealing element 14 is installed on the outer wall of the lower end of the sliding sleeve and can plug the lower end opening of the first annular well-flushing channel, and the inner wall of the upper end of the backwashing sleeve and the.

Further, the large discharge well-flushing control device comprises:

and the spring 16 is arranged in the spring sleeve, a second annular well washing channel is formed between the inner wall of the spring sleeve and the outer wall of the central pipe, the inner diameter of the spring sleeve is larger than the outer diameter of the lower end of the sliding sleeve, the upper end of the spring is connected with the lower end face of the sliding sleeve through an upper spring backing ring 15, and the lower end of the spring is limited on an annular step formed on the inner wall of the spring sleeve through a lower spring backing ring 17.

Furthermore, the backwashing sleeve is connected and fixed with the piston sleeve through the piston sleeve rotation-proof nail 10, and the backwashing sleeve is connected and fixed with the spring sleeve through the spring sleeve rotation-proof nail 13.

Furthermore, the upper end of the piston sleeve is connected with the outer wall of the lower end of the upper joint 1, the upper end of the central tube is connected with the inner wall of the lower end of the upper joint, the upper joint is provided with an eccentric hydraulic control channel, an upper port of the hydraulic control channel is connected with a first hydraulic control pipeline, the lower end of the hydraulic control channel is communicated with the upper end of an inner cavity of the piston sleeve, and the piston sleeve and the upper joint are further fixedly connected through an upper joint anti-rotation.

Further, the packer setting, anchoring and unsetting device comprises:

the pressure transfer cylinder 18 is sleeved outside the central pipe, a third annular well washing channel is formed between the inner wall of the pressure transfer cylinder and the outer wall of the central pipe, the upper end of the third annular well washing channel is communicated with a second annular well washing channel of a spring sleeve of the large-discharge well washing control device, the upper end of the pressure transfer cylinder is connected with the lower end of the spring sleeve of the large-discharge well washing control device, the pressure transfer cylinder is further provided with an eccentric pressure transfer channel, and the upper port of the pressure transfer channel is connected with a second hydraulic control pipeline;

Further, the packer setting device comprises:

the rubber cylinders 20 are sleeved on the outer wall of the pressure transmission cylinder, at least one rubber cylinder is arranged, and when the number of the rubber cylinders is more than or equal to two, a spacing ring 21 is arranged between every two rubber cylinders;

the double-piston mechanism is arranged between the outer sleeve 25 and the central tube 2, and the middle part of the double-piston mechanism is communicated with the pressure transmission channel through a radial pressure transmission hole formed in the pressure transmission cylinder;

and the upper end surface of the push rod sleeve 22 props against the bottom end of the rubber barrel, and the lower end of the push rod sleeve is connected with a double-piston mechanism.

Further, the double piston mechanism includes:

the upper piston 27 is arranged between the outer sleeve and the central tube, and the upper end of the upper piston is connected with the lower end of the push rod sleeve;

a lower piston 29 interposed between the jacket and the central tube;

and a pressure transfer C-shaped ring 28 which is placed between the lower end surface of the upper piston and the upper end surface of the lower piston, and the gap of the pressure transfer C-shaped ring faces the radial pressure transfer hole of the pressure transfer cylinder, so that the liquid of the pressure transfer channel enters the gap of the pressure transfer C-shaped ring to simultaneously act on the upper piston and the lower piston.

Further, the inner wall of the upper end of the outer sleeve 25 is connected with a lock ring fixing sleeve 24 through threads, and the lock ring fixing sleeve is fixedly connected with the push rod sleeve 22 through a setting shear pin 23.

Furthermore, a lock ring 26 is arranged on the inner wall of the outer sleeve, and the inner wall of the lock ring is connected with the outer wall of the push rod sleeve in a button type.

Furthermore, the upper end of the pressure transmission cylinder 18 is connected with the lower end of the spring sleeve through an anti-rotation nail 19 of the pressure transmission cylinder.

Further, the anchoring deblocking device comprises:

slips 34 disposed in the slip grooves of the slip sleeve 32;

the upper end of the upper cone 31 extends into the outer sleeve of the packer setting device and corresponds to a lower piston in the outer sleeve, the conical surface at the lower end of the upper cone acts on the upper end of the plate spring, and the outer wall of the middle part of the plate spring abuts against the inner wall of the slip;

and a lower cone 36, wherein the upper end of the lower cone is a conical surface and acts on the lower end of the plate spring 35.

Further, the slip sleeve is connected with the upper cone through an anchoring shear pin 33, and the slip sleeve is connected with the lower cone through a slip sleeve rotation-preventing pin 37.

Further, the lower end of the slip sleeve is connected with a lower retaining sleeve 38.

Further, lower cone lower extreme connection deblocking shear ring cover 39, set up deblocking shear ring 42 between deblocking shear ring cover inner wall and the biography pressure section of thick bamboo outer wall, deblocking shear ring 42 inner wall card is gone into and is installed in biography pressure section of thick bamboo outer wall sets up the annular.

Further, the upper end of the upper cone is fixedly connected with the outer sleeve through an outer sleeve anti-rotation nail 30.

Furthermore, the lower end of the lower cone is fixedly connected with the deblocking shear ring sleeve 39 through the deblocking shear ring sleeve anti-rotation nail 40 and then is jointly positioned on the anti-blocking C-shaped ring 41, so that the lower cone 36 is centered, and the axial movement is free during deblocking.

The invention adopts the following structure, which comprises a cylinder structure formed by connecting an upper joint and a central pipe from top to bottom, wherein a large-discharge well-flushing control device and a packer setting, anchoring and unsealing device are sequentially connected to the outer side of the cylinder structure from top to bottom.

The large-discharge well-flushing control device and the central pipe are in the same circle center and are in concentric structure; the seat seal anchor unsealing device and the central tube are not in the same circle center and are of an eccentric structure.

The large-discharge well washing control device is composed of a well washing switch control mechanism and a well washing reserved channel, the well washing switch control mechanism comprises an upper connector, a piston push-pull sleeve, a piston sleeve, a sliding sleeve, a backwashing sleeve, a vulcanization sealing element, a spring sleeve, an upper spring backing ring, a lower spring backing ring and a spring, and the well washing reserved channel is an annular cavity formed by a central pipe and a pressure transmission cylinder.

And a pressure transmission cylinder is arranged on one side of the upper joint, the piston can be put in and then is in threaded connection with the piston push-pull sleeve, the upper end of the piston push-pull sleeve is propped against the lower end of the upper joint, and the lower end of the piston push-pull sleeve is propped against the upper end of the sliding sleeve.

Two sealing grooves are formed in the upper end of the piston, and O-shaped rings are placed in the middle of the check rings on the two sides in the grooves to guarantee sealing.

The outside cover of sliding sleeve has the backwash cover, and the protruding portion in backwash cover upper end has the effect of rightting the sliding sleeve, and the sliding sleeve lower extreme is equipped with the vulcanization sealing member, can with backwash cover lower extreme in close contact with.

The sliding sleeve is sequentially connected with an upper spring backing ring, a spring and a lower spring backing ring from top to bottom, and the lower end of the lower spring backing ring is pressed against the inner cavity of the spring sleeve.

An upper joint anti-rotation nail is arranged between the piston sleeve and the upper joint, an upper joint anti-rotation nail is arranged between the piston sleeve and the backwashing sleeve, a spring sleeve anti-rotation nail is arranged between the spring sleeve and the backwashing sleeve, and a pressure transmitting cylinder anti-rotation nail is arranged between the spring sleeve and the pressure transmitting cylinder.

The packer setting anchoring and releasing device is composed of a rubber cylinder, a spacer ring, a push rod sleeve, a locking ring fixing sleeve, a locking ring, an outer sleeve, an upper piston, a pressure transmission C-shaped ring, a lower piston, an upper cone, a slip, a plate spring, a lower cone, a slip sleeve, a lower retaining sleeve, a releasing shear ring sleeve and a releasing shear ring, wherein the rubber cylinder, the spacer ring, the push rod sleeve, the locking ring fixing sleeve, the locking ring, the outer sleeve, the upper piston, the pressure transmission.

The upper end and the lower end of the pressure transmission cylinder are provided with connecting holes capable of being connected with a hydraulic control pipeline through NPT joints, and the through holes can realize the crossing of the pipeline while the tool is set and anchored.

The two rubber cylinders are separated by a spacer ring, and the upper end of the push rod sleeve is propped against the lower end of the lower rubber cylinder. The push rod sleeve is externally sleeved with the lock ring fixing sleeve, the lock ring and the outer sleeve in sequence from top to bottom, and the lock ring and the push rod sleeve are internally provided with the horse teeth.

And a pressure transmission C-shaped ring is arranged between the upper piston and the lower piston.

And the upper piston and the lower piston are provided with O-shaped rings in the sealing grooves to ensure sealing, and the upper cone is sleeved outside the pressure transmission cylinder and at the lower part of the lower piston and is connected with the outer sleeve by threads.

The upper end of the slip is abutted against the lower end of the upper cone, the lower end of the slip is abutted against the upper end of the lower cone, the bulges at the two ends of the slip are opposite to the preset holes of the slip sleeve, the plate spring is arranged in the annular space between the intermediate groove of the slip and the slip sleeve, and the lower end of the slip sleeve is in threaded connection with the lower retainer sleeve.

The lower end of the lower cone is supported at the upper end of the deblocking shear ring sleeve, the outer side of the deblocking shear ring is arranged in a groove at the inner side of the deblocking shear ring sleeve, and the inner side of the deblocking shear ring is arranged in a groove at a corresponding position at the outer side of the pressure transmission cylinder.

The overcoat with it prevents changeing the nail to go up to be provided with the overcoat between the cone, the slip cover with it prevents changeing the nail to be provided with the slip cover down between the spacer sleeve the deblocking shear ring cover with the cone is provided with the deblocking shear ring cover down and prevents changeing the nail.

The lower end of the lower cone is connected and fixed with the deblocking shear ring sleeve through the deblocking shear ring sleeve rotation prevention nail and then is jointly positioned on the anti-blocking C-shaped ring, and the anti-blocking C-shaped ring is sleeved on the outer wall of the pressure transmission cylinder, so that the lower cone is righted, and the free axial movement during deblocking is guaranteed.

The invention controls the large-discharge well-washing control device of the packer and the setting anchoring and releasing device of the packer to be two independent hydraulic control pipelines.

The large-discharge well-flushing control device opens a vulcanized sealing element 14 attached to a front sliding sleeve 11 and is in close contact with a backwashing sleeve 9 to form a sealing surface, and water flow at the lower end of the tool cannot flow upwards from the backwashing sleeve 9 through an annular water channel formed by a central pipe 2, a pressure transmission cylinder 18 and a spring sleeve 12.

Before the packer is put into a well, a pipeline is connected to the joint of the upper end of an upper joint 1 through an NPT joint, the ground pushes a piston 6 after pressurizing a hydraulic control pipeline, the piston 6 drives a piston push-pull sleeve 7 to push a sliding sleeve 11 downwards, the sliding sleeve 11 overcomes the upper jacking force of a spring 16 and is attached to a vulcanization sealing element 14 and a backwashing sleeve 9 which are arranged on the sliding sleeve when moving downwards, and water flow at the lower end of the tool flows out through the backwashing sleeve 9 through an annular water channel formed by a central pipe 2, a pressure transfer cylinder 18 and the spring sleeve 12 and flows upwards through the vulcanization sealing element 14 and a water flow switch of the backwashing.

When the ground is decompressed to the hydraulic control pipeline, the spring 16 acts on the spring upper backing ring 15 to push the sliding sleeve 11 to move upwards, the vulcanized sealing element 14 attached to the sliding sleeve 11 and the backwashing sleeve 9 form a sealing surface again, and the well washing channel is closed.

The packer realizes setting anchoring through a hydraulic control pipeline, the setting and anchoring states of the packer are not changed after the hydraulic control pipeline is decompressed, and the tool is unlocked and contacted with the anchoring through lifting the tool. Before the packer is put into a well, a pipeline is connected to the joint of the upper end of the pressure transmission cylinder 18 through an NPT joint, and after the hydraulic control pipeline is pressurized on the ground, hydraulic pressure pushes the upper piston 27 and the lower piston 29 to move upwards and downwards respectively through a pressure transmission hole reserved in the pressure transmission cylinder. The lower piston moves downwards to drive the outer sleeve 25, the outer sleeve 25 is connected with the lock ring fixing sleeve 24 through threads, when the pushing force is large enough to cut the setting shear pin 23, the upper piston moves upwards to push the push rod sleeve 22 to compress the rubber sleeve 20 to play a setting role, the lower piston can also push the upper vertebral body 31, when the anchoring shear pin 33 is cut by the downward pushing piston force, the upper vertebral body 31 continues to move downwards, and the slips 34 protrude out under the action of the plate spring 35 to complete anchoring.

The packer unsealing is realized by lifting a tool, the slips 34 are anchored on the wall of the casing, after the tool is lifted, the slips 34 push a lower cone 36 downwards, the lower cone moves downwards to push a unsealing shear ring sleeve 39, and after the unsealing shear ring 42 is sheared, the tool is unsealed and the anchoring is released.

The packer can realize permanent setting anchoring and has a well backwashing function.

Example 2:

referring to fig. 1, the present invention provides a technical solution: an oil jacket safety packer with an anchor, comprising:

Further, the large discharge well-flushing control device comprises:

Further, the packer setting, anchoring and unsetting device comprises:

Further, the packer setting device comprises:

Further, the double piston mechanism includes:

a lower piston 29 interposed between the jacket and the central tube;

Further, the anchoring deblocking device comprises:

slips 34 disposed in the slip grooves of the slip sleeve 32;

Further, the lower end of the lower cone is connected with a deblocking shear ring sleeve 39, and a deblocking shear ring 42 is arranged between the inner wall of the deblocking shear ring sleeve and the outer wall of the pressure transmission cylinder.

Example 3:

Further, the large discharge well-flushing control device comprises:

Further, the packer setting, anchoring and unsetting device comprises:

Further, the packer setting device comprises:

Further, the double piston mechanism includes:

a lower piston 29 interposed between the jacket and the central tube;

Example 5:

Further, the large discharge well-flushing control device comprises:

Further, the packer setting, anchoring and unsetting device comprises:

Further, the packer setting device comprises:

Further, the double piston mechanism includes:

a lower piston 29 interposed between the jacket and the central tube;

Example 6:

Further, the large discharge well-flushing control device comprises:

Further, the packer setting, anchoring and unsetting device comprises:

Further, the packer setting device comprises:

Example 7:

Further, the large discharge well-flushing control device comprises:

Further, the packer setting, anchoring and unsetting device comprises:

Example 8:

Further, the large discharge well-flushing control device comprises:

Example 9:

Further, the large discharge well-flushing control device comprises:

Although fig. 1 to 5 are used in all the above embodiments, it is obvious to those skilled in the art that separate drawings are not shown as long as the parts or structural features missing in the embodiments are removed from the drawings. As will be clear to the skilled person. Of course, the embodiments with more components are only the best embodiments, and the embodiments with less components are the basic embodiments, but the basic objects of the invention can also be achieved, so all of them are within the protection scope of the invention.

All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threading, bolting, etc.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil jacket safety packer with an anchor, comprising:

2. The safety packer with anchored oil jacket of claim 1, wherein the high-displacement well-flushing control device comprises:

3. The safety packer of claim 2, wherein the high-displacement well-flushing control device comprises:

4. The oil jacket safety packer with the anchor of claim 2, wherein the backwash sleeve is connected and fixed with the piston sleeve through a piston sleeve rotation-preventing nail, and the backwash sleeve is connected and fixed with the spring sleeve through a spring sleeve rotation-preventing nail.

5. The oil jacket safety packer with the anchor according to claim 2, wherein the upper end of the piston jacket is connected with the outer wall of the lower end of the upper joint, the upper end of the central pipe is connected with the inner wall of the lower end of the upper joint, the upper joint is provided with an eccentric hydraulic control channel, an upper port of the hydraulic control channel is connected with a first hydraulic control pipeline, the lower end of the hydraulic control channel is communicated with the upper end of the inner cavity of the piston jacket, and the piston jacket and the upper joint are further connected and fixed through an upper joint anti-rotation nail.

6. The safety packer with an anchored oil jacket as claimed in claim 1 or 2, wherein the packer setting anchoring unsetting device comprises:

7. The anchored oil jacket safety packer of claim 6, wherein the packer setting device comprises:

8. The anchored oil jacket safety packer of claim 7, wherein said dual piston mechanism comprises:

a lower piston disposed between the outer jacket and the center tube;

9. The oil jacket safety packer with anchor as claimed in claim 8, wherein the inner wall of the upper end of the outer casing is connected with the lock ring fixing sleeve through screw threads, and the lock ring fixing sleeve is connected and fixed with the push rod sleeve through a setting shear pin.

10. The oil jacket safety packer with the anchor as claimed in claim 9, wherein the inner wall of the outer jacket is provided with a locking ring, and the inner wall of the locking ring is connected with the outer wall of the push rod jacket in a button type.

11. The oil jacket safety packer with the anchor according to claim 8, wherein the upper end of the pressure transfer cylinder is connected with the lower end of the spring jacket through an anti-rotation nail of the pressure transfer cylinder.

12. The oil jacket safety packer with anchor as claimed in claim 6 or 10, wherein the anchor releasing device comprises:

the slips are arranged in the slip grooves of the slip sleeve;

13. The oil jacket safety packer with anchor as claimed in claim 12, wherein the slip sleeve is connected to the upper cone by an anchor shear pin, and the slip sleeve is connected to the lower cone by a slip sleeve rotation preventing pin.

14. The safety packer with an anchored oil jacket as recited in claim 12, wherein the inner wall of the slip sleeve and the outer wall of the upper cone are provided with axial limiting platforms at the same time.

15. The safety packer with an anchored oil jacket as recited in claim 12, wherein the lower end of the slip sleeve is connected to a lower retaining sleeve.

16. The oil jacket safety packer with anchor of claim 12, wherein the lower end of the lower cone is connected with a deblocking shear ring sleeve, and a deblocking shear ring is arranged between the inner wall of the deblocking shear ring sleeve and the outer wall of the pressure transmission cylinder.

17. The oil jacket safety packer with anchor as claimed in claim 12, wherein the upper end of the upper cone is fixedly connected to the outer casing by an outer casing anti-rotation nail.

18. The oil jacket safety packer with anchor of claim 12, wherein the lower end of the lower cone is fixedly connected with the deblocking shear collar anti-rotation nail and the deblocking shear collar and then is positioned on the anti-blocking C-shaped ring together.

19. The use method of the oil jacket safety packer with the anchoring function is characterized by comprising the following steps of:

20. The use method of the oil jacket safety packer with the anchor is characterized in that a pipeline is connected to the joint of the upper end of the pressure transmission cylinder through an NPT joint before the packer is put into a well, and after the hydraulic control pipeline is pressurized on the ground, hydraulic pressure pushes the upper piston and the lower piston to move upwards and downwards through a pressure transmission hole reserved in the pressure transmission cylinder respectively; the lower piston drives the outer sleeve when moving downwards, the outer sleeve is connected with the locking ring fixing sleeve through threads, when the pushing force is large enough to cut off the setting shear pin, the upper piston moves upwards to push the push rod sleeve to compress the rubber sleeve to play a setting role, the lower piston can also push the upper vertebral body, when the downward pushing piston force cuts off the anchoring shear pin, the upper vertebral body continues to move downwards, and the slips protrude out under the action of the plate spring to finish anchoring;

21. The method of claim 20, wherein the packer is unset by pulling the tool up, the slips are anchored to the casing wall, the slips push the lower cone downward after the tool is pulled up, the lower cone pushes the unset shear collar, the unset shear collar and the lower cone are released downward after shearing the inner unset shear collar, the slips lose the compression of the leaf spring and retract radially, unset the tool and unset the anchor.