CN219492262U - Recoverable packer of high-pressure gas storage well - Google Patents

Abstract

The utility model discloses a recyclable packer for a high-pressure gas storage well, which comprises a packer body and a deblocking device, wherein the packer body comprises a mandrel, an upper end connector, a sealing rubber barrel assembly, a piston assembly and an anchoring slip assembly, wherein the upper end connector, the sealing rubber barrel assembly, the piston assembly and the anchoring slip assembly are sequentially arranged outside the mandrel from top to bottom; the first deblocking ring is abutted against the inner wall of the elastic claw and is connected with the elastic claw through a pin; the deblocking device comprises a rod body and an elastic capturing component, and when deblocking is carried out, the deblocking device stretches into the mandrel, and the elastic capturing claw component is clamped with the first deblocking ring. In this case, through setting up the deblocking subassembly into elastic claw and butt in the elastic claw inner wall, and rather than adopting pin connection's first deblocking ring, after the packer is set, the elastic claw is unaffected with the pin of first deblocking ring connection, can only deblocking through the deblocking ware, has greatly improved the stability and the security of packer when working in the pit.

Description

Recoverable packer of high-pressure gas storage well

Technical Field

The utility model relates to the technical field of oil and gas field well completion, in particular to a recoverable packer for a high-pressure gas storage well.

Background

In recent years, with the deep development of offshore or land oil and gas fields, multi-point exploitation and large-area derrick laying have become future trends, so that the application of completion tools has also shown explosive growth, while a recovery packer is one of conventional and commonly applied completion exploitation tools, and the super tensile strength and riveting capability of the recovery packer play a critical role in the whole tool string, so that the recovery packer is a foundation for ensuring normal underground operation.

In the prior art, an unsealing shear pin type recoverable packer is generally adopted, and because the unsealing shear pin type recoverable packer is generally arranged outside a mandrel, and the unsealing ring and the mandrel are directly riveted through the shear pin, the packer can be completely transmitted to the unsealing pin when being subjected to underground upward jacking force, when the underground pressure is too strong or the unsealing shear pin is subjected to long-term pressure bearing, the strength of the unsealing shear pin is gradually attenuated or even broken, so that the packer is accidentally unsealed in the production and operation process, the anchoring function of the packer is invalid, and serious production and operation accidents are caused.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a recoverable packer for a high-pressure gas storage well, which comprises the following components: the packer comprises a packer body, a packer body and a packer body, wherein the packer body comprises a mandrel, an upper end joint, a sealing rubber cylinder assembly, a piston assembly and an anchoring slip assembly which are sequentially arranged outside the mandrel from top to bottom along the mandrel; the side wall of the mandrel is provided with a pressure transmission hole, the piston assembly is positioned outside the pressure transmission hole, the upper end joint is in threaded connection with the upper end of the mandrel, and the sealing rubber cylinder assembly, the piston assembly and the anchoring slip assembly are in threaded connection in sequence from beginning to end;

the device comprises an anchoring slip assembly, a mandrel, an anchoring slip assembly, a first deblocking ring, a second deblocking ring, a first deblocking ring and a second deblocking ring, wherein the first deblocking ring is arranged in the anchoring slip assembly, one end of the elastic claw is positioned in the anchoring slip assembly and is in threaded connection with one end of the mandrel, the other end of the elastic claw is positioned outside the anchoring slip assembly and is in butt joint with the anchoring slip assembly, and the first deblocking ring is positioned in one end of the elastic claw positioned outside the anchoring slip assembly and is in butt joint with the inner wall of the elastic claw and is connected with the elastic claw through a pin; a kind of electronic device with high-pressure air-conditioning system

The deblocking device comprises a rod body, pawl assemblies and elastic capturing assemblies, wherein the pawl assemblies and the elastic capturing assemblies are connected to the lower end of the rod body, and when deblocking is carried out, the rod body and the elastic capturing assemblies extend into the mandrel, the elastic capturing pawl assemblies are clamped with a first deblocking ring, and the pawl assemblies are clamped with an upper end connector.

According to one embodiment of the utility model, the elastic claw comprises a fixed cylinder and a plurality of claw bodies, wherein the fixed cylinder is positioned in the anchoring slip assembly and is in threaded connection with one end of the mandrel, the plurality of claw bodies are circumferentially arranged at one end of the fixed cylinder and extend to the outside of the anchoring slip assembly back to the mandrel, the first deblocking ring is abutted with the inner wall of one end of the plurality of claw bodies positioned outside of the anchoring slip assembly and is respectively connected with the plurality of claw bodies through pins, and one end of the anchoring slip assembly is abutted with one end of the claw bodies.

According to one embodiment of the utility model, the outer wall of each jaw body at the outer end of the anchoring slip assembly is provided with a boss, and the anchoring slip assembly is abutted against the boss of each jaw body.

According to one embodiment of the utility model, the elastic capturing assembly comprises a connecting rod, an elastic piece sleeved outside the connecting rod, an elastic capturing claw and a second unsealing ring, one end of the connecting rod is detachably connected with the rod body, the other end of the connecting rod is provided with a limiting ring, the elastic piece is positioned between the elastic capturing claw and the rod body, two ends of the elastic piece are respectively abutted against the rod body and the elastic capturing claw, and the second unsealing ring is positioned between the elastic capturing claw and the limiting ring and is connected with the connecting rod by adopting a pin.

According to one embodiment of the utility model, the piston assembly comprises an inner piston cylinder, an outer piston cylinder and an anti-reversing structure, one ends of the inner piston cylinder and the outer piston cylinder are sleeved on the outer wall of the mandrel and are respectively positioned at two sides of the pressure transmission hole, the inner piston cylinder is further positioned in the outer piston cylinder, the other end of the inner piston cylinder extends out of the outer piston cylinder to be in threaded connection with the rubber cylinder assembly, one end of the outer piston cylinder is in threaded connection with the anchoring slip assembly, the anti-reversing structure is positioned outside the inner piston cylinder and between the outer piston cylinder and the rubber cylinder assembly, one end of the anti-reversing structure is in threaded connection with the outer piston cylinder, and the other end of the anti-reversing structure is connected with the inner piston cylinder through a pin.

According to one embodiment of the utility model, the anti-reversing structure comprises a shear ring, an inner slip and an inner clamping sleeve, wherein the shear ring is connected with an inner piston cylinder through a pin, two ends of the inner clamping sleeve are respectively connected with the shear ring and an outer piston cylinder in a threaded manner, a first clamping tooth is arranged on the inner wall of the inner clamping sleeve, a second clamping tooth is arranged on one surface of the inner clamping sleeve, the first clamping tooth is meshed with the second clamping tooth, a first fine tooth is arranged on the other surface of the inner clamping sleeve, a second fine tooth is arranged on the inner piston cylinder, and the first fine tooth is meshed with the second fine tooth.

According to one embodiment of the utility model, the anchoring slip assembly comprises an upper cone, a slip assembly and a lower cone, wherein one end of the upper cone is in threaded connection with the piston assembly, the other end of the upper cone is provided with a conical surface, one end of the lower cone is also provided with a conical surface, the slip assembly is opposite to the upper cone, the slip assembly is positioned between the upper cone and the lower cone, two ends of the slip assembly are respectively abutted against the conical surfaces of the upper cone and the lower cone, and the other end of the lower cone is positioned outside the deblocking assembly and is abutted against one end of the deblocking assembly.

According to one embodiment of the utility model, the slip assembly comprises an anchoring slip, an elastic sheet and a slip cage, wherein two ends of the anchoring slip are provided with opposite anchoring teeth, a plurality of groups of windows are arranged on the slip cage along the circumferential direction, at least two anchoring teeth are arranged on each group of windows along the length direction of the window, the anchoring teeth are respectively exposed out of the windows, the elastic sheet is positioned between the anchoring slip and the slip cage and respectively abutted against the inner wall of the slip cage and the anchoring teeth at two ends of the anchoring slip, one surface of the two ends of the anchoring slip, which is opposite to the anchoring teeth, is also provided with an extrusion inclined surface, and the extrusion inclined surface is respectively attached to the conical surfaces of the upper cone and the lower cone.

According to one embodiment of the utility model, the inner wall of the upper end fitting is provided with threads, which are left-handed threads.

According to one embodiment of the utility model, the packer body further comprises a lower end fitting that is swaged to one end of the anchoring slip assembly and is threadably connected to one end of the anchoring slip assembly.

According to the utility model, the elastic claw and the first deblocking ring are arranged on the mandrel, and after the packer is set, a special deblocking device is needed to be used for deblocking, so that the packer is not influenced by underground pressure, the risk of failure of an anchoring function caused by deblocking of the packer due to the influence of the underground pressure is effectively avoided, and the stability and the safety of the packer in underground working are greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a main structure of a packer in an embodiment;

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is a schematic diagram of a decapsulator in an embodiment;

FIG. 4 is a cross-sectional view of the mating structure of the packer body and the decap device in an embodiment;

FIG. 5 is an enlarged view of portion D of FIG. 2;

FIG. 6 is an enlarged view of portion E of FIG. 3;

FIG. 7 is an enlarged view of portion F of FIG. 4;

FIG. 8 is an enlarged view of portion B of FIG. 2;

FIG. 9 is an enlarged view of portion C of FIG. 2;

FIG. 10 is a cross-sectional view taken along line a-a of FIG. 1;

FIG. 11 is an enlarged view of portion G of FIG. 1;

FIG. 12 is an enlarged view of portion A of FIG. 2;

fig. 13 is a schematic view of a pawl assembly according to an embodiment.

Detailed Description

Various embodiments of the utility model are disclosed in the following drawings, in which details of the practice are set forth in the following description for the purpose of clarity. However, it should be understood that these practical details are not to be taken as limiting the utility model. That is, in some embodiments of the utility model, these practical details are unnecessary. Moreover, for the purpose of simplifying the drawings, some conventional structures and components are shown in the drawings in a simplified schematic manner.

In addition, the descriptions of the "first," "second," and the like, herein are for descriptive purposes only and are not intended to be specifically construed as order or sequence, nor are they intended to limit the utility model solely for distinguishing between components or operations described in the same technical term, but are not to be construed as indicating or implying any relative importance or order of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-5, fig. 1 is a schematic diagram of a main body structure of a packer in an embodiment, fig. 2 is a longitudinal sectional view of fig. 1, fig. 3 is a schematic diagram of a decapsulator in an embodiment, fig. 4 is a sectional view of a cooperation structure of a main body of a packer and the decapsulator in an embodiment, and fig. 5 is an enlarged view of a portion D in fig. 2. In the embodiment, the recyclable packer for the high-pressure gas storage well comprises a packer body 1 and a deblocking device 2, wherein the packer body 1 comprises a mandrel 11, an upper end connector 12, a sealing rubber cylinder assembly 13, a piston assembly 14 and an anchoring slip assembly 15, wherein the upper end connector 12, the sealing rubber cylinder assembly 13, the piston assembly 14 and the anchoring slip assembly 15 are sequentially arranged outside the mandrel 11 in a surrounding manner from top to bottom along the mandrel 11; the side wall of the mandrel 11 is provided with a pressure transmission hole 111, the piston assembly 14 is positioned outside the pressure transmission hole 111, the upper end joint 12 is in threaded connection with the upper end of the mandrel 11, and the sealing rubber cylinder assembly 13, the piston assembly 14 and the anchoring slip assembly 15 are in threaded connection in sequence from beginning to end;

the deblocking assembly 16 further comprises an elastic claw 161 and a first deblocking ring 162, wherein one end of the elastic claw is positioned in the anchoring slip assembly 15 and is in threaded connection with one end of the mandrel, the other end of the elastic claw is positioned outside the anchoring slip assembly 15 and is in butt joint with the anchoring slip assembly 15, and the first deblocking ring 162 is positioned in one end of the elastic claw 161 outside the anchoring slip assembly 15 and is in butt joint with the inner wall of the elastic claw 161 and is connected with the elastic claw 161 through a pin; a kind of electronic device with high-pressure air-conditioning system

The decapsulator 2 comprises a rod 21, and pawl assemblies 23 and elastic capturing assemblies 22 respectively connected to the upper end and the lower end of the rod 21. When setting, the upper end and the lower end of the packer are respectively connected with tool strings such as oil pipes to form an oil gas pipe column, hydraulic pressure is applied to the pipe column, the hydraulic pressure enters the piston assembly 14 from the pressure transmission hole 11, the piston assembly 14 is respectively extruded towards the rubber barrel assembly 13 and the anchoring slip assembly 15, the radial expansion of the rubber barrel assembly 13 and the anchoring slip assembly 15 reaches the setting, at the moment, the anchoring slip assembly 15 is borne at one end of the elastic claw 161, when the underground pressure is abnormal, the mandrel 11 is jacked up, the elastic claw 161 is in threaded connection with the mandrel 11, the anchoring slip assembly 15 is mutually abutted with the elastic claw 161, the jacking force borne by the mandrel 11 is borne by the elastic claw 161 and the anchoring slip assembly 15, and the elastic claw 161 is abutted against the inner wall of the elastic claw 161 again because the first deblocking ring 162 is in the elastic claw 161, so that the elastic claw 161 keeps radial expansion, and under the interaction force of the elastic claw 161 and the anchoring slip assembly 15, the first deblocking ring 162 only receives radial pressure, and the pin connected with the first deblocking ring 162 and the elastic claw 161 can not cause shearing force, therefore the underground pressure is not jacked up by the elastic claw 161, and the potential safety hazard is prevented.

During deblocking, the deblocking device 2 stretches into the mandrel 11, the elastic capturing component 22 passes through the first deblocking ring 162, meanwhile, the pawl component 23 is clamped with the inner wall of the upper end joint 12, at this time, the elastic capturing component 22 is lifted up, the elastic capturing component 22 is retracted to the first deblocking ring 162 and clamped with the first deblocking ring 162, the elastic capturing component 22 is lifted up continuously, under the interaction force between the elastic capturing component 22 and the first deblocking ring 162, the pin connected with the elastic claw 161 by the first deblocking ring 162 is sheared off, the first deblocking ring 162 moves upwards and is clamped with one end connected with the mandrel 11 by the elastic claw 161, so that the abutting force between the elastic claw 161 and the first deblocking ring 162 disappears, the elastic claw 161 is rebounded and contracted, the elastic claw 161 loses the support to the anchoring slip component 15, the anchoring slip component 15 is contracted and the anchoring to the tubular column, and at the same time, the lifting up upper end joint 12 of the pawl component 23 enables the mandrel 11 to move upwards, the interaction force of the upper end joint 12 with the mandrel component 13 is also contracted, and therefore the deblocking is realized.

In this example, the acting force of the anchoring slip assembly 15 acts on the elastic claw 161, so that the acting force cannot affect the packer when the underground pressure is abnormal, and the special deblocking device 2 is required to be adopted for deblocking during deblocking, so that the safety of the underground operation of the packer is effectively improved, and meanwhile, when the packer is recovered, the packer is not required to be milled and can be deblocked and recovered, so that the cost of a single well tool is effectively reduced, and the operation period is shortened.

Further, the elastic claw 161 includes a fixed cylinder 1611 and a plurality of claw bodies 1612, the fixed cylinder 1611 is located in the anchoring slip assembly 15 and is in threaded connection with one end of the mandrel 11, the plurality of claw bodies 1612 are circumferentially located at one end of the fixed cylinder 1611 and extend away from the mandrel 11 to the outside of the anchoring slip assembly 15, the first deblocking ring 162 is abutted with the inner walls of the plurality of claw bodies 1612 located at the outer end of the anchoring slip assembly 15 and is respectively connected with the plurality of claw bodies 1612 through pins, and one end of the anchoring slip assembly 15 is abutted with one end of the claw bodies 1612. Because the first unsealing ring 162 abuts against the inner walls of the plurality of claws 1612, the plurality of claws 1612 expand to support one end of the anchoring slip assembly 15, and when the elastic capturing assembly 22 shears pins connected to the first unsealing ring 162 and the claws 1612, the first unsealing ring 162 moves upward and does not abut against the claws 1612 any more, so that the claws 1612 shrink, and unsealing can be performed.

Further, the outer wall of each jaw 1612 at the outer end of the anchoring slip assembly 15 is provided with a boss 16121, and the anchoring slip assembly 15 abuts the boss 16121 of each jaw 1612.

Referring to fig. 6-7, turning to fig. 1-5, fig. 6 is an enlarged view of portion E of fig. 3, and fig. 7 is an enlarged view of portion F of fig. 4. Further, the elastic capturing assembly 22 includes a lower connecting rod 221, an elastic member 222 sleeved outside the lower connecting rod 221, an elastic capturing claw 223 and a second unsealing ring 224, one end of the lower connecting rod 221 is detachably connected with the rod 21, the other end of the lower connecting rod is provided with a limiting ring 2211, the elastic member 222 is located between the elastic capturing claw 223 and the rod 21, two ends of the elastic member 222 respectively abut against the rod 21 and the elastic capturing claw 223, the second unsealing ring 224 is located between the elastic capturing claw 223 and the limiting ring 2211, the second unsealing ring 224 is connected with the lower connecting rod 221 by adopting a pin, and the elastic capturing claw 223 keeps radial expansion under the joint action of the elastic member 222 and the second unsealing ring 224.

When the elastic catch assembly 22 enters the mandrel 11, the elastic catch claw 223 needs to pass through the first deblocking ring 162, at the same time, the elastic catch claw 223 abuts against the first deblocking ring 162, and at the same time, the pawl assembly 23 is clamped against the inner wall of the upper end joint 12, pressure is applied to the rod body 21, so that the elastic piece 222 contracts, the elastic potential energy of the elastic piece 222 extrudes the elastic catch claw 223, so that the elastic catch claw 223 passes through the first deblocking ring 162, and then the deblocking device 2 lifts up, the first deblocking ring 162 limits the elastic catch claw 223, as the deblocking device 2 gradually lifts up, the interaction force between the elastic catch claw 223 and the first deblocking ring 162 gradually increases, so that the pin connected to the first deblocking ring 162 and the claw body 1612 is sheared, the first deblocking ring 162 moves up along with the elastic catch claw 223, the claw body 1612 contracts, and loses support to the anchoring slip assembly 15, and when the first deblocking ring 162 moves up and abuts against one end of the mandrel 11 located in the deblocking assembly 16, the first deblocking ring 162 lifts up, the first deblocking ring 162 again generates a limit force on the catch claw 223, so that the second deblocking ring 233 slides down along with the mandrel 11, and the second deblocking ring 224 slides down, and the elastic catch ring 11 slides back down, so that the pin is clamped by the second deblocking ring 11 is retracted along with the second deblocking ring 11, and the elastic catch ring 11 is retracted, thereby completing the compression force, and the compression force is terminated by the second joint 11, and the elastic catch ring is pulled up, and the elastic catch ring. In this example, the elastic member 222 is a spring.

Referring to fig. 8 for review of fig. 1-2, fig. 8 is an enlarged view of section B of fig. 2. Further, the piston assembly 14 includes an inner piston cylinder 141, an outer piston cylinder 142 and an anti-reversing structure 143, one ends of the inner piston cylinder 141 and the outer piston cylinder 142 are sleeved on the outer wall of the mandrel 11 and are respectively located at two sides of the pressure transmission hole 111, the inner piston cylinder 141 is located in the outer piston cylinder 142, the other end of the inner piston cylinder 141 extends out of the outer piston cylinder 142 to be in threaded connection with the rubber cylinder assembly 13, one end of the outer piston cylinder 142 is in threaded connection with the anchoring slip assembly 15, the anti-reversing structure 143 is located outside the inner piston cylinder 141 and between the outer piston cylinder 142 and the rubber cylinder assembly 13, one end of the anti-reversing structure 143 is in threaded connection with the outer piston cylinder 142, and the other end of the anti-reversing structure is connected with the inner piston cylinder 141 through a pin. Preferably, the ends of the inner piston cylinder 141 and the outer piston cylinder 142, which are in contact with the mandrel, are sealed with sealing rings.

Specifically, when the hydraulic pressure in the pipe column enters the piston assembly 14 from the pressure transmission hole 111, the hydraulic pressure is located between the inner piston cylinder 141 and the outer piston cylinder 142, and the inner piston cylinder 141 and the outer piston cylinder 142 are simultaneously extruded, so that the inner piston cylinder 141 and the outer piston cylinder 142 move in the up-down direction respectively, the inner piston cylinder 141 extrudes the rubber cylinder assembly 13 in the moving process, so that the rubber cylinder assembly 13 is radially expanded to be sealed on the inner wall of the pipe column, and meanwhile, the outer piston cylinder 142 extrudes the anchoring slip assembly 15 in the moving process, so that the anchoring slip assembly 15 is radially expanded to be anchored on the inner wall of the pipe column, thereby realizing setting.

Further, the anti-reversing structure 143 includes a shear ring 1431, an inner clamp 1432 and an inner clamp sleeve 1433, the shear ring 1341 is connected with the inner piston cylinder 141 by a pin, two ends of the inner clamp sleeve 143 are respectively connected with the shear ring 1431 and the outer piston cylinder 142 by threads, a first latch 14331 is provided on the inner wall of the inner clamp sleeve 1433, a second latch 14321 is provided on one surface of the inner clamp 1432, the first latch 14331 is engaged with the second latch 14321, a first fine tooth 14322 is provided on the other surface of the inner clamp 1432, the inner piston cylinder 141 is provided with a second fine tooth 1411, and the first fine tooth 14322 is engaged with the second fine tooth 1411. In this example, the first serrations 14322 and the second serrations 1411 are unidirectional teeth.

When the inner piston cylinder 141 and the outer piston cylinder 142 are pressed in different directions by pressure, the pins connected to the shear ring 1431 and the inner piston cylinder 141 are sheared, so that the inner piston cylinder 141 and the outer piston cylinder 142 can move relatively, the inner slip sleeve 142 and the shear ring 1432 are driven to move while the outer piston cylinder 142 moves, the second clamping teeth 14321 of the inner slip 1432 are meshed with the second clamping teeth 14331 of the inner slip sleeve 1433, so that the inner slip sleeve 1433 drives the inner slip 1432 to move along the outer wall of the inner piston cylinder 141, and the first fine teeth 14322 on the inner slip 1432 are gradually meshed with the second fine teeth 1411 on the outer wall of the inner piston cylinder 141, and the first fine teeth 14322 and the second fine teeth 1411 are unidirectional teeth, so that after the first fine teeth 14322 are meshed with the second fine teeth 1411, the inner piston cylinder 141 and the inner slip sleeve 1432 cannot retract, thereby further improving the setting strength and stability of the packer.

Preferably, the inner clamp 1432 is stakable to the inner clamp sleeve 1433 to prevent rotation of the inner clamp.

Referring to fig. 9-11, turning to fig. 1-2, fig. 9 is an enlarged view of portion C of fig. 2, fig. 10 is a sectional view taken along a-a of fig. 1, and fig. 11 is an enlarged view of portion G of fig. 1. Further, the anchoring slip assembly 15 includes an upper cone 151, a slip assembly 152 and a lower cone 153, one end of the upper cone is in threaded connection with the piston assembly 14, the other end of the upper cone has a conical surface, one end of the lower cone 153 also has a conical surface, the conical surface of the lower cone 153 is opposite to the conical surface of the upper cone 151, the slip assembly 152 is located between the upper cone 151 and the lower cone 153, two ends of the slip assembly 152 respectively abut against the conical surfaces of the upper cone 151 and the lower cone 153, and the other end of the lower cone 153 is located outside the deblocking assembly 16 and abuts against one end of the deblocking assembly 16. Specifically, one end of the upper cone 151 is in threaded connection with one end of the outer piston cylinder 142, when the outer piston 142 moves, the outer piston 142 presses the upper cone 151, so that the upper cone 151 moves towards the lower cone 153, and conical surfaces of the upper cone 151 and the lower cone 153 jointly squeeze the slip assembly 152, so that the slip assembly 152 radially expands to be anchored on the inner wall of the pipe column, and setting is achieved.

Further, the slip assembly 152 includes an anchoring slip 1521, elastic plates 1522 and a slip cage 1523, wherein two ends of the anchoring slip 1521 are provided with opposite anchoring teeth 15211, the slip cage 1523 is provided with a plurality of sets of windows 15231 along the circumferential direction, at least two sets of windows 15231 are provided along the length direction of the slip cage 1523, the anchoring teeth 15211 are respectively exposed out of the windows 15231, the elastic plates 1522 are positioned between the anchoring slip 1521 and the slip cage 1523, the elastic plates 1522 are respectively abutted against the inner wall of the slip cage 1523 and between the anchoring teeth 15211 at two ends of the anchoring slip 1521, one surface of two ends of the anchoring slip 1521 facing away from the anchoring teeth 15211 is further provided with extrusion inclined surfaces 15212, and the extrusion inclined surfaces 15212 at two ends of the anchoring slip 1521 are respectively attached to the conical surfaces of the upper cone 151 and the lower cone 153. Because the slips 1521 shrink under the action of the elastic sheets 1522, the anchoring teeth 15211 are not exposed outside the windows 15231 of the slip cage 1523, so that the packer is smoother when in well logging, when the outer piston cylinder 142 pushes the upper cone 151, the conical surfaces of the upper cone 151 and the lower cone 153 jointly squeeze the inclined surfaces at two ends of the anchoring slips 1521, at this time, the anchoring slips 1521 expand radially, the elastic sheets 1522 compress, and the anchoring teeth 15211 at two ends of the anchoring slips 1521 are exposed outside the windows 15231 and anchored on the inner wall of the pipe column. In this example, the anchoring slips 1521 are two-way tooth slips.

Referring to fig. 12, and again to fig. 1-2, fig. 12 is an enlarged view of a portion a of fig. 2. Still further, the rubber cylinder assembly 13 comprises two rubber cylinders 131, two rubber cylinder sleeves 132 and two rubber cylinder supporting sleeves 133, wherein the two rubber cylinder sleeves 132 are respectively sleeved at two ends of the rubber cylinder 131, one end of each rubber cylinder supporting sleeve 133 is in threaded connection with one end of the corresponding inner piston 141, the two rubber cylinder sleeves 132 are respectively abutted to the upper end joint 12 and the rubber cylinder supporting sleeve 133, when the inner piston 141 moves, the upper end joint 12 and the rubber cylinder supporting sleeve 133 simultaneously extrude the rubber cylinder sleeves 132 at two ends of the rubber cylinder 131, so that the rubber cylinder 131 is radially expanded to be sealed in a pipe column, and the rubber cylinder 131 has better interference under the action of the rubber cylinder sleeves 132, so that the rubber cylinder assembly has better sealing effect.

Turning to fig. 1-2. Further, the inner wall of the upper end joint 12 is provided with threads 121, preferably, the threads 121 are left-handed threads, when the packer works, the upper end joint 12 can be connected with the upper end pipe string through the threads to realize sealing, when the upper end pipe string needs to be replaced or maintained, the packer is not required to be unsealed, the upper end pipe string can be maintained or replaced only by screwing the upper end pipe string right-handed and lifting out, the working efficiency is greatly improved, the tool cost is saved, and meanwhile, when the packer is unsealed, the pawl assembly 23 of the unsealer 2 can be clamped with the threads 121.

Referring to fig. 13, and again to fig. 3-4, fig. 13 is a schematic view of a pawl assembly according to an embodiment. Further, the pawl assembly 23 includes an upper connecting rod 231, a sliding cylinder 232 and a pawl 233, wherein one end of the upper connecting rod 231 is connected with one end of the rod body 21 facing away from the elastic capturing assembly 22, the other end of the upper connecting rod 231 is further provided with a limiting head 2311, the sliding cylinder 232 is slidably arranged on the upper connecting rod 231 and is limited by the limiting head 2311 and one end of the rod body 21, the pawl 233 is sleeved outside the sliding cylinder 232, one end of the pawl 233 is fixed on the outer wall of the sliding cylinder 232, and the other end of the pawl 233 faces the rod body 21 and can radially expand or contract.

Specifically, the pawl 233 includes a pawl fixing cylinder 2331 and a plurality of pawl bodies 2332, the pawl fixing cylinder 2331 is fixed on the outer wall of the sliding cylinder 232, the plurality of pawl bodies 2332 are circumferentially arranged at one end of the pawl fixing cylinder 2331 and extend towards the rod body 21, along the length direction of the pawl bodies 2332, a plurality of circles of clamping teeth 2321 are arranged on the outer wall of each pawl body 2332, and the plurality of circles of clamping teeth 23321 are upwards arranged, so that when the deblocking device 2 enters the mandrel 11, the pawl bodies 2332 move downwards, the clamping teeth 2321 and the threads 121 are mutually extruded, the pawl bodies 2332 shrink in a radial direction, when the deblocking device lifts upwards, the pawl bodies 2332 rebound, the clamping teeth 23121 are clamped with the threads 121, so that the pawl bodies 2332 drive the upper end connector 12 to move, and then the mandrel 11 moves upwards.

That is, when the decapsulator 2 enters the mandrel 1, as the decapsulator 2 moves downward, the limiting head 2311 abuts against the pawl 223 to enable the pawl to move downward in the upper end connector 121 and continuously clamp the threads 121, when the decapsulator 2 lifts up, the upper end connecting rod 231 slides in the sliding cylinder 232 and drives the rod body 22 to move upward, when the rod body 22 abuts against the sliding cylinder 232, the rod body 22 lifts up the sliding cylinder 232, the pawl 232 lifts up the upper end connector 12 to drive the mandrel 11 to move upward, and thus the decapsulation can be completed and the decapsulator 1 can be lifted up.

Turning to fig. 1-2. Preferably, the packer body 1 further comprises a lower end connector 17, wherein the lower end connector 17 is sleeved at one end of the anchoring slip assembly 15 and is in threaded connection with the anchoring slip assembly 15. Specifically, the lower end connector 17 is sleeved on the outer wall of one end of the lower cone 153 and is in threaded connection with the outer wall of the lower cone 153, the lower end connector 17 is further in contact with the lower cone 153 and the first unsealing ring 162 respectively, when the lower cone 153 transmits force to the boss 16121 of the claw 1612, the lower cone 17 is enabled to effectively transmit force to the boss 16121 of the 1612 under the support limit of the lower end connector 17, meanwhile, when the elastic capturing claw 223 passes through the first unsealing ring 162, under the contact of the lower end connector 17, the first unsealing ring 162 is carried by the lower end connector 17 under the thrust of the elastic capturing claw 223, so that the pins connected to the first unsealing ring 162 and the elastic claw 161 are effectively prevented from being sheared when the elastic capturing claw 223 passes through the first unsealing ring 162, and the advanced unsealing of the first unsealing ring 162 caused by the elastic capturing claw 223 is prevented, and therefore stability of the packer is further improved.

In summary, when setting, oil pipe and tool string are being connected at packer upper and lower both ends, form the oil gas tubular column, apply hydraulic pressure in to the tubular column, hydraulic pressure gets into the piston subassembly by the pressure transmission hole, and extrude interior piston tube and outer piston tube simultaneously, make the pin that connects in deblocking ring and interior piston tube cut, interior piston tube and outer piston tube simultaneously move towards upper and lower both ends respectively, interior piston tube motion in-process, promote the packing element support cover, make the packing element cover at packing element both ends co-extrusion packing element, and then make the packing element take place radial expansion in order to seal the tubular column, outer piston tube motion in-process, promote the upper cone towards the motion of lower cone, upper cone and lower cone co-extrusion anchor slips, make anchor slips radial expansion, anchor slips both ends's anchor latch exposes with the window of slips cage and anchor in the tubular column inner wall, simultaneously, the boss of elastic claw is born to the other end of lower cone.

During deblocking, the deblocking device stretches into the mandrel, when the elastic capturing claw reaches the first deblocking ring, the first deblocking ring is abutted against the elastic capturing claw, so that the elastic capturing claw radially contracts, meanwhile, the elastic piece is compressed and generates elasticity to push the elastic capturing claw to the first deblocking ring, after the elastic capturing claw passes through the first deblocking ring, the lifting rod body is arranged, the elastic capturing claw is clamped with the first deblocking ring, meanwhile, the pawl assembly is clamped with the upper end joint, under the action of upward pulling force, the pins connected to the first deblocking ring and the elastic capturing claw are sheared, the various claw bodies of the elastic claw lose supporting force to shrink, so that the anchoring slip assembly loses supporting force to radially contract, anchoring with a tubular column is released, meanwhile, as the deblocking device continues to upwards lift, the first deblocking ring moves upwards and is abutted by the mandrel, under the abutting action of the mandrel, interaction force is generated again between the first deblocking ring and the elastic capturing claw, so that the second deblocking ring and the elastic capturing claw are connected to the first deblocking ring and the lower end connecting rod, the pawl assembly is clamped with the upper end joint, under the action of upward pulling force, the pin connected to the first deblocking ring and the elastic capturing claw slides downwards to the lower end connecting rod, the upper end joint is also radially upwards connected to the upper end joint, the blocking device is contracted, the upper end joint is further contracted, and the upper end joint of the packer is removed, and the packer is further contracted, and the packer is reached.

Through setting up the deblocking subassembly that has elastic claw and first deblocking ring at the dabber, after the packer sets up, need adopt dedicated deblocking ware to carry out deblocking, not receive the influence of downhole pressure, the effectual anchor function inefficacy risk that leads to of deblocking of avoiding the packer because of the influence of downhole pressure, simultaneously, when the packer needs to change partial instrument or maintenance upper end tubular column, need not to mill the packer, effectively reduces single well tool cost and operating cycle.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present utility model, should be included in the scope of the claims of the present utility model.

Claims (10)

1. A recoverable packer for a high pressure gas storage well, comprising:

the packer comprises a packer body, a packer body and a packer body, wherein the packer body comprises a mandrel, an upper end joint, a sealing rubber cylinder assembly, a piston assembly and an anchoring slip assembly which are sequentially arranged outside the mandrel in a surrounding manner from top to bottom along the mandrel; the side wall of the mandrel is provided with a pressure transmission hole, the piston assembly is positioned outside the pressure transmission hole, the upper end joint is in threaded connection with the upper end of the mandrel, and the sealing rubber cylinder assembly, the piston assembly and the anchoring slip assembly are in threaded connection end to end in sequence;

the device comprises an anchoring slip assembly, a mandrel, an anchoring slip assembly, a first deblocking ring, a second deblocking ring, a third deblocking ring and a fourth deblocking ring, wherein the elastic claw is positioned in the anchoring slip assembly and is in threaded connection with one end of the mandrel, the other end of the elastic claw is positioned outside the anchoring slip assembly and is in butt joint with the anchoring slip assembly, and the first deblocking ring is positioned in one end of the elastic claw outside the anchoring slip assembly and is in butt joint with the inner wall of the elastic claw and is in pin connection with the elastic claw; a kind of electronic device with high-pressure air-conditioning system

The deblocking device comprises a rod body, pawl assemblies and elastic capturing assemblies, wherein the pawl assemblies and the elastic capturing assemblies are respectively connected to the upper end and the lower end of the rod body, and when deblocking is carried out, the rod body and the elastic capturing assemblies extend into the mandrel, the pawl assemblies are clamped with the upper end joint, and the elastic capturing pawl assemblies are clamped with the first deblocking ring.

2. The recoverable packer of a high pressure gas storage well according to claim 1, wherein the elastic claw comprises a fixed cylinder and a plurality of claw bodies, the fixed cylinder is located in the anchoring slip assembly and is in threaded connection with one end of the mandrel, the plurality of claw bodies are circumferentially arranged at one end of the fixed cylinder and extend away from the mandrel to the outside of the anchoring slip assembly, the first unsealing ring is abutted with inner walls of the plurality of claw bodies located at the outer end of the anchoring slip assembly and are respectively connected with the plurality of claw bodies through pins, and one end of the anchoring slip assembly is abutted with one end of the claw body.

3. The recoverable packer of claim 2, wherein the outer wall of each jaw at the outer end of the anchoring slip assembly has a boss, and the anchoring slip assembly abuts the boss of each jaw.

4. The recoverable packer of claim 1, wherein the elastic capturing component comprises a connecting rod, an elastic member sleeved outside the connecting rod, an elastic capturing claw and a second unsealing ring, one end of the connecting rod is detachably connected with the rod body, the other end of the connecting rod is provided with a limiting ring, the elastic member is positioned between the elastic capturing claw and the rod body, two ends of the elastic member are respectively abutted against the rod body and the elastic capturing claw, and the second unsealing ring is positioned between the elastic capturing claw and the limiting ring and is connected with the connecting rod by adopting a pin.

5. The recoverable packer of a high pressure gas storage well according to claim 1, wherein the piston assembly comprises an inner piston cylinder, an outer piston cylinder and an anti-reversing structure, one ends of the inner piston cylinder and the outer piston cylinder are sleeved on the outer wall of the mandrel and are respectively positioned on two sides of the pressure transmission hole, the inner piston cylinder is further positioned in the outer piston cylinder, the other end of the inner piston cylinder extends out of the outer piston cylinder to be in threaded connection with the rubber cylinder assembly, one end of the outer piston cylinder is in threaded connection with the anchoring slip assembly, the anti-reversing structure is positioned outside the inner piston cylinder and between the outer piston cylinder and the rubber cylinder assembly, one end of the anti-reversing structure is in threaded connection with the outer piston cylinder, and the other end of the anti-reversing structure is connected with the inner piston cylinder through a pin.

6. The recoverable packer of a high pressure gas storage well of claim 5, wherein the anti-backup structure comprises a shear ring, an inner slip and an inner clamp sleeve, the shear ring is connected with the inner piston cylinder through a pin, two ends of the inner clamp sleeve are respectively connected with the shear ring and the outer piston cylinder in a threaded manner, a first latch is arranged on the inner wall of the inner clamp sleeve, a second latch is arranged on one surface of the inner clamp, the first latch is meshed with the second latch, a first fine tooth is arranged on the other surface of the inner clamp, the inner piston cylinder is provided with a second fine tooth, and the first fine tooth is meshed with the second fine tooth.

7. The recoverable packer of claim 1, wherein the anchoring slip assembly comprises an upper cone, a slip assembly and a lower cone, wherein one end of the upper cone is in threaded connection with the piston assembly, the other end of the upper cone is provided with a conical surface, one end of the lower cone is provided with a conical surface, the slip assembly is positioned between the upper cone and the lower cone opposite to the upper cone, two ends of the slip assembly are respectively abutted against the conical surfaces of the upper cone and the lower cone, and the other end of the lower cone is positioned outside the deblocking assembly and is abutted against one end of the deblocking assembly.

8. The recoverable packer of a high pressure gas storage well according to claim 7, wherein the slip assembly comprises an anchoring slip, an elastic sheet and a slip cage, wherein two ends of the anchoring slip are provided with anchoring teeth which are arranged oppositely, the slip cage is provided with a plurality of groups of windows along the circumferential direction, at least two of the windows are arranged along the length direction of the slip cage, the anchoring teeth are respectively exposed out of the windows, the elastic sheet is positioned between the anchoring slip and the slip cage and respectively abuts against the inner wall of the slip cage and the anchoring teeth at two ends of the anchoring slip, one surface of the two ends of the anchoring slip, which faces away from the anchoring teeth, is further provided with an extrusion inclined surface, and the extrusion inclined surface is respectively attached to the conical surfaces of the upper cone and the lower cone.

9. The recoverable packer of claim 1, wherein the upper end fitting has threads on an inner wall thereof, and wherein the rod body extends into the mandrel when unsealed, and the pawl assembly is engaged with the threads.

10. The recoverable packer for a high pressure gas storage well of claim 1, wherein the packer body further comprises a lower end fitting that is swaged to and threadably engages an end of the anchoring slip assembly.