CN113250645A - Piston-driven type expansion packer - Google Patents
Piston-driven type expansion packer Download PDFInfo
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- CN113250645A CN113250645A CN202110692252.5A CN202110692252A CN113250645A CN 113250645 A CN113250645 A CN 113250645A CN 202110692252 A CN202110692252 A CN 202110692252A CN 113250645 A CN113250645 A CN 113250645A
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- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims description 27
- 230000001133 acceleration Effects 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1275—Packers; Plugs with inflatable sleeve inflated by down-hole pumping means operated by a down-hole drive
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of an expansion packer, in particular to a piston-pushing type expansion packer which comprises a central pipe, an upper joint, a first sheath, a first sleeve, a rubber cylinder, a second sleeve, a second sheath, a connecting pipe, a piston assembly, a pressure relief assembly and a lower joint, wherein the rubber cylinder is sleeved on the outer side of the middle part of the central pipe, the first sleeve sleeved on the outer side of the upper part of the central pipe is arranged on the inner side of the upper end of the rubber cylinder, the upper end of the first sleeve is positioned above the rubber cylinder, and the first sheath is sleeved on the outer side of the upper end of the rubber cylinder. The hydraulic pressure sealing device is reasonable and compact in structure and convenient to use, liquid is injected into hydraulic pressure through the hydraulic cavity, the piston assembly is arranged to push the liquid to enter the liquid inlet channel and push the rubber cylinder to expand, sealing is formed, the piston is recommended to return during unsealing, the liquid flows out of the liquid injection hole to be decompressed, unsealing is achieved, seat sealing can be completed without the need of liquid injection pressing equipment, the operation process is simpler, construction cost is saved, and the hydraulic pressure sealing device has the advantages of being safe, labor-saving, simple, convenient and efficient.
Description
Technical Field
The invention relates to the technical field of expansion packers, in particular to a piston-pushing type expansion packer.
Background
The packer is a downhole tool used for layering in oil production engineering, and particularly relates to a downhole tool which is provided with an elastic sealing element, so that annular spaces between a pipe column and a borehole and between the pipe columns in various sizes are sealed off, a production zone is isolated, production liquid is controlled, and a casing is protected.
Traditional expanding packer need be to the intraductal notes liquid of center and suppress when setting, need let out the intraductal pressure of center when the deblocking. Therefore, the packer needs to be provided with high-pressure fluid by a liquid injection and pressing device on the ground during the operation of the packer, so that the construction cost is increased, the packer setting process is more complicated, and the problem that the pressure release and the unsealing cannot be realized due to the failure of the assembly exists.
Disclosure of Invention
The invention provides a piston-pushing type expansion packer, which overcomes the defects of the prior art and can effectively solve the problems of time and labor waste, low construction efficiency and potential safety hazard in setting and deblocking of the conventional packer.
The technical scheme of the invention is realized by the following measures: a piston-pushing type expansion packer comprises a central tube, an upper joint, a first sheath, a first sleeve, a rubber cylinder, a second sleeve, a second sheath, a connecting tube, a piston assembly, a pressure relief assembly and a lower joint, wherein the rubber cylinder is sleeved outside the middle part of the central tube, the first sleeve sleeved outside the upper part of the central tube is arranged on the inner side of the upper end of the rubber cylinder, the upper end of the first sleeve is positioned above the rubber cylinder, the first sheath is sleeved outside the upper end of the rubber cylinder, a first inner ring platform with the lower end abutting against the upper end of the rubber cylinder is arranged on the inner side of the upper part of the first sheath, the upper joint is arranged on the inner side of the upper end of the first sheath corresponding to the upper end of the first inner ring platform, the inner side of the lower end of the upper joint is fixedly installed with the outer side of the upper end of the central tube, the lower end of the upper joint abuts against the upper end of the first sleeve and the upper end of the first inner ring platform, the inner side of the lower end of the rubber cylinder is provided with the second sleeve sleeved outside the lower part of the central tube, the lower end of the second sleeve is positioned below the rubber cylinder, a second sheath is sleeved on the outer side of the lower end of the rubber cylinder, a second inner ring platform with the upper end abutting against the lower end of the rubber cylinder is arranged on the inner side of the lower part of the second sheath, a liquid inlet channel is arranged between the inner side of the second inner ring platform and the second sheath, a connecting pipe with the lower end positioned below the inner side of the lower end of the second sheath is arranged on the inner side of the lower end of the second sheath, the inner side of the upper end of the connecting pipe is fixedly arranged with the outer side of the lower end of the central pipe, the upper end of the connecting pipe abuts against the lower end of the second sheath and the lower end of the second inner ring platform, a hydraulic cavity communicated with the liquid inlet channel is arranged on the upper end of the connecting pipe, an internally and externally communicated liquid injection hole is arranged on the inner side of the upper part of the connecting pipe corresponding to the position between the liquid injection hole and the lower end of the central pipe, a pressure relief assembly is arranged in the pressure relief hole, and the pressure relief hole comprises a first straight hole, a second straight hole, a third straight hole and a fourth straight hole with sequentially reduced inner diameter from inside to outside, the pressure release subassembly includes the case, the disk seat, spacing ring and arc are protruding, first downthehole spacing ring that is equipped with of straight, the downthehole disk seat that is equipped with of second, the downthehole third straight hole that passes in proper order of fourth straight downthehole, the disk seat, the case of spacing ring, case inner fixed mounting has the arc protruding, the case middle part that corresponds the third straight hole position is equipped with the outer loop platform, outer loop platform inner is the big-end-in-size sealing conical surface, sealing conical surface can form sealedly with disk seat outer end inboard, the connecting pipe lower part is equipped with the installation cavity with hydraulic pressure chamber intercommunication, be equipped with the piston assembly that the upper end is located the hydraulic pressure intracavity and can upwards stretch out in the installation cavity, connecting pipe lower extreme outside fixed mounting has the lower clutch.
The following is further optimization or/and improvement of the technical scheme of the invention:
above-mentioned piston assembly can include the piston ring, promote ring, linear electric motor and power, and the installation intracavity is equipped with from top to bottom in proper order and promotes ring, linear electric motor and power, promotes the ring upper end and is located the hydraulic pressure intracavity, promotes ring upper end fixed mounting and has the piston ring, promotes ring lower extreme and linear electric motor fixed mounting together.
The piston assembly can further comprise a control assembly, the control assembly is arranged in the mounting cavity and comprises an acceleration sensor, a motor controller and a control unit, the motor controller is connected with the linear motor, and the control unit is respectively connected with the acceleration sensor and the motor controller.
The device also comprises a retaining assembly, at least one retaining assembly is distributed in the installation cavity corresponding to the outer side position of the middle part of the push ring along the circumference, the retaining assembly comprises a spring, an electromagnet, a retaining tooth, a T-shaped block, an outer guide post, an inner baffle and an outer baffle which are arranged at intervals inside and outside, at least one electromagnet and at least two outer guide posts are arranged at the inner side of the outer baffle at intervals up and down, the inner baffle plate corresponding to each outer guide post is provided with a movable groove with an outward opening, the movable groove is internally provided with a T-shaped block, each outer guide post is sleeved with a spring with the inner end sleeved on the T-shaped block, the inner baffle plate corresponding to the middle position of the left side of each movable groove is provided with an inner and outer through sliding hole, the inner end of the sliding hole is provided with a stopping tooth outside the sliding hole, the outer end of the stopping tooth is fixedly installed together with the inner side of the T-shaped block, and a pushing ring corresponding to the position of the stopping tooth is provided with a stopping groove matched with the stopping tooth.
Three retaining assemblies can be uniformly distributed in the mounting cavity corresponding to the outer side position of the middle part of the push ring along the circumference.
The connecting pipe can comprise a connecting inner pipe and a connecting outer pipe, the inner side of the upper end of the connecting inner pipe is fixedly mounted with the outer side of the upper end of a central pipe, the outer side of the lower end of the connecting inner pipe is fixedly mounted with the inner side of the upper end of a lower connector, the outer side of the upper end of the connecting outer pipe is fixedly mounted with the inner side of the lower end of a second sheath, a first fixing ring table and a second fixing ring table are respectively arranged on the outer side of the connecting inner pipe and the inner side of the connecting outer pipe corresponding to the position below a liquid injection hole, a hydraulic cavity is formed between the connecting inner pipe and the connecting outer pipe corresponding to the position on the upper side of the first fixing ring table and the position on the lower side of the second fixing ring table, and an installation cavity is formed between the connecting inner pipe and the connecting outer.
The connecting pipe corresponding to the upper end of the lower connector is provided with a sealing baffle ring capable of plugging the lower end of the mounting cavity.
The hydraulic pressure sealing device is reasonable and compact in structure and convenient to use, liquid is injected into hydraulic pressure through the hydraulic cavity, the piston assembly is arranged to push the liquid to enter the liquid inlet channel and push the rubber cylinder to expand, sealing is formed, the piston is recommended to return during unsealing, the liquid flows out of the liquid injection hole to be decompressed, unsealing is achieved, seat sealing can be completed without the need of liquid injection pressing equipment, when the piston assembly fails and cannot be unsealed, unsealing can be performed through the decompression assembly, the operation process is simpler, construction cost is saved, and the hydraulic pressure sealing device has the advantages of being safe, labor-saving, simple, convenient and efficient.
Drawings
FIG. 1 is a schematic sectional view of the preferred embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view at A-A in FIG. 1.
Fig. 3 is an enlarged schematic view of B in fig. 1.
Fig. 4 is an enlarged schematic view of C of fig. 1.
The codes in the figures are respectively: the device comprises a central tube 1, an upper joint 2, a first sheath 3, a first sleeve 4, a rubber tube 5, a second sleeve 6, a second sheath 7, a lower joint 8, a first inner ring platform 9, a second inner ring platform 10, a liquid inlet channel 11, a hydraulic cavity 12, a piston ring 13, a push ring 14, a linear motor 15, a power supply 16, a control component 17, a spring 18, an electromagnet 19, a stopping tooth 20, a T-shaped block 21, an outer guide column 22, an inner baffle 23, an outer baffle 24, a limiting ring 25, a valve seat 26, a valve core 27, an arc-shaped bulge 28, an outer ring platform 29, an inner connecting tube 30, an outer connecting tube 31, a first fixed ring platform 32, a second fixed ring platform 33, a sealing baffle ring 34 and a liquid injection hole 35.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
as shown in attached figures 1, 2, 3 and 4, the piston-driven expansion packer comprises a central tube 1, an upper joint 2, a first sheath 3, a first sleeve 4, a rubber cylinder 5, a second sleeve 6, a second sheath 7, a connecting tube, a piston assembly, a pressure relief assembly and a lower joint 8, wherein the rubber cylinder 5 is sleeved outside the middle part of the central tube 1, the first sleeve 4 sleeved outside the upper part of the central tube 1 is arranged inside the upper end of the rubber cylinder 5, the upper end of the first sleeve 4 is positioned above the rubber cylinder 5, the first sheath 3 is sleeved outside the upper end of the rubber cylinder 5, a first inner ring platform 9 with the lower end abutting against the upper end of the rubber cylinder 5 is arranged inside the upper part of the first sheath 3, the upper joint 2 is arranged inside the upper end of the first sheath 3 corresponding to the upper side of the first inner ring platform 9, the inner side of the lower end of the upper joint 2 is fixedly installed together with the outer side of the upper end of the central tube 1, the lower end of the upper joint 2 abuts against the upper end of the first sleeve 4 and the upper end of the first inner ring platform 9, a second sleeve 6 sleeved on the outer side of the lower part of the central tube 1 is arranged on the inner side of the lower end of the rubber tube 5, the lower end of the second sleeve 6 is positioned below the rubber tube 5, a second sheath 7 is sleeved on the outer side of the lower end of the rubber tube 5, a second inner ring platform 10 with the upper end abutting against the lower end of the rubber tube 5 is arranged on the inner side of the lower end of the second sheath 7, a liquid inlet channel 11 is arranged between the inner side of the second inner ring platform 10 and the second sleeve 6, a connecting tube with the lower end positioned below the inner side of the lower end of the second sheath 7 is arranged on the inner side of the lower end of the central tube 1, the inner side of the upper end of the connecting tube is fixedly arranged together with the outer side of the lower end of the central tube 1, the upper end of the connecting tube abuts against the lower end of the second sleeve 6 and the lower end of the second inner ring platform 10, a hydraulic cavity 12 communicated with the liquid inlet channel 11 is arranged on the upper end of the connecting tube, a liquid injection hole 35 communicated with the inner cavity is arranged on the inner side of the connecting tube corresponding to the lower end of the central tube 1 and the liquid injection hole 35, a pressure relief component is arranged in the pressure relief hole, the pressure relief hole comprises a first straight hole, a second straight hole, a third straight hole and a fourth straight hole, the inner diameter of the first straight hole is sequentially reduced from inside to outside, the pressure relief component comprises a valve core 27, a valve seat 26, a limiting ring 25 and an arc-shaped bulge 28, the limiting ring 25 is arranged in the first straight hole, the valve seat 26 is arranged in the second straight hole, the inner end of the fourth straight hole sequentially penetrates through the third straight hole, the valve seat 26 and the valve core 27 of the limiting ring 25, the arc-shaped bulge 28 is fixedly arranged at the inner end of the valve core 27, the middle of the valve core 27 corresponding to the third straight hole is provided with an outer annular table 29, the inner end of the outer annular table 29 is a sealing conical surface with a small inner part and a large outer part, the sealing conical surface can form sealing with the inner side of the outer end of the valve seat 26, the lower part of the connecting pipe is provided with an installation cavity communicated with the hydraulic cavity 12, a piston assembly with the upper end located in the hydraulic cavity 12 and capable of extending upwards is arranged in the installation cavity, and the outer side of the lower end of the connecting pipe is fixedly provided with a lower joint 8.
When the sealing device is used, when sealing is needed, the pipe string is placed at a specified position, liquid is injected into the hydraulic cavity 12 from the liquid injection hole 35, then the piston assembly is controlled to move upwards to push liquid to enter the liquid inlet channel 11, the liquid is pressurized by the thrust of the piston assembly and pushes the rubber cylinder 5, so that the rubber cylinder 5 is expanded to realize sealing, when unsealing is needed, the piston assembly is controlled to return downwards to make the liquid lose the thrust, meanwhile, the liquid can flow out from the liquid injection hole 35 to realize pressure relief, so that the rubber cylinder 5 loses pressure retraction, so that unsealing is realized, if the piston assembly cannot fall down to cause pressure relief, a circular ring is put into the central pipe 1, when the circular ring falls under the action of gravity, the circular ring is pushed towards the arc-shaped bulge 28, the arc-shaped bulge 28 pushes the valve core 27 outwards, so that the sealing conical surface of the outer ring table 29 is separated from the outer end of the valve seat 26 and is not sealed, and the liquid flows to the fourth straight hole from the hydraulic cavity 12, And the third straight hole, the second straight hole and the first straight hole are finally discharged, so that the pressure relief is realized. The invention has simple operation, does not need to provide high-pressure liquid on ground liquid injection and pressing equipment, and has simple operation steps.
The piston-driven expansion packer can be further optimized or/and improved according to actual needs:
as shown in fig. 1, 2, 3 and 4, the piston assembly includes a piston ring 13, a push ring 14, a linear motor 15 and a power supply 16, the push ring 14, the linear motor 15 and the power supply 16 are sequentially arranged in the installation cavity from top to bottom, the upper end of the push ring 14 is located in the hydraulic cavity 12, the piston ring 13 is fixedly installed at the upper end of the push ring 14, and the lower end of the push ring 14 is fixedly installed with the linear motor 15. When the device is used, the linear motor 15 is controlled to push the pushing ring 14 and the piston ring 13 to move upwards or downwards, so that liquid pressurization and pressure relief are realized. According to the demand, be equipped with the sealing washer between piston ring 13 outside and the connecting pipe inboard, be equipped with the sealing washer between the propelling movement ring 14 outside and the connecting pipe inboard, avoid liquid to leak and lead to pressure not enough.
As shown in fig. 1, 2, 3 and 4, the piston assembly further comprises a control assembly 17, the control assembly 17 is arranged in the installation cavity, the control assembly 17 comprises an acceleration sensor, a motor controller and a control unit, the motor controller is connected with the linear motor 15, and the control unit is respectively connected with the acceleration sensor and the motor controller. When using, the top on ground drives the device and lifts and transfers the tubular column, produces the law vibrations, and acceleration sensor gathers vibration signal transmission and gives the control unit, and the control unit compares vibration signal, and sending signal gives the linear electric motor 15 promotion piston ring 13 and goes upward or down to realize automatic setting and deblocking, simple and convenient more swift. The control unit can be a single chip microcomputer according to requirements.
As shown in the attached figure 4, the device also comprises a stopping component, at least one stopping component is distributed along the circumference in the installation cavity corresponding to the outer side position of the middle part of the pushing ring 14, the stopping component comprises a spring 18, an electromagnet 19, stopping teeth 20, a T-shaped block 21, outer guide posts 22, an inner baffle plate 23 and an outer baffle plate 24 which are arranged at intervals inside and outside, the inner side of the outer baffle plate 24 is provided with at least one electromagnet 19 and at least two outer guide posts 22 at intervals up and down, the inner baffle plate 23 corresponding to the position of each outer guide post 22 is provided with a movable groove with an outward opening, the movable groove is internally provided with the T-shaped block 21, each outer guide post 22 is sleeved with the spring 18 with an inner end sleeved on the T-shaped block 21, the inner baffle plate 23 corresponding to the middle position of the left side of each movable groove is provided with a sliding hole which is communicated with the inside and outside, the stopping teeth 20 with inner ends positioned outside the sliding hole are arranged in the sliding hole, the stopping teeth 20 are fixedly installed with the inner side of the T-shaped block 21, the pushing ring 14 corresponding to the position of the stopping teeth 20 is provided with stopping grooves matched with the stopping teeth 20. When the linear motor 15 is in failure during the seat sealing process, in order to prevent the push ring 14 from falling down, a backstop component is arranged to control the position of the push rod, so that the seat sealing is kept tight. The use does, when the push ring 14 goes upward, extrusion stopping tooth 20 outwards removes, stopping tooth 20 extrusion spring 18 simultaneously, after the push ring 14 reached the assigned position, stopping tooth 20 inwards stretches out under the effect of spring 18 restoring force, the card is in the stopping inslot on push ring 14 to unable automatic gliding, when needs the deblocking, electro-magnet 19 circular telegram adsorbs T-shaped piece 21 outwards removes, make stopping tooth 20 break away from the stopping inslot, push ring 14 moves down under the effect of liquid pressure, make liquid from annotating liquid hole 35 discharge, thereby realize the pressure release.
As shown in fig. 2, three retaining assemblies are uniformly distributed along the circumference in the installation cavity corresponding to the outer side position of the middle part of the push ring 14. In use, the push ring 14 is prevented from falling back under the pressure of the liquid by the arrangement, and is more stable.
As shown in the attached figures 1, 2, 3 and 4, the connecting pipe comprises an inner connecting pipe 30 and an outer connecting pipe 31, the inner side of the upper end of the inner connecting pipe 30 is fixedly installed with the outer side of the upper end of the central pipe 1, the outer side of the lower end of the inner connecting pipe 30 is fixedly installed with the inner side of the upper end of the lower joint 8, the outer side of the upper end of the outer connecting pipe 31 is fixedly installed with the inner side of the lower end of the second sheath 7, the outer side of the connecting inner pipe 30 and the inner side of the connecting outer pipe 31 corresponding to the position below the liquid injection hole 35 are respectively provided with a first fixed ring platform 32 and a second fixed ring platform 33, the upper part of the push ring 14 is arranged between the first fixed ring platform 32 and the second fixed ring platform 33, a hydraulic pressure chamber 12 is formed between the connection inner tube 30 and the connection outer tube 31 at positions corresponding to upper sides of the first and second fixing ring stages 32 and 33, an installation cavity is formed between the connecting inner pipe 30 and the connecting outer pipe 31 corresponding to the lower side positions of the first fixing ring table 32 and the second fixing ring table 33. In use, the separate inner and outer connecting tubes 30, 31 facilitate component installation.
As shown in fig. 1, 2, 3 and 4, the installation cavity further comprises a sealing baffle ring 34, and the connecting pipe corresponding to the upper end of the lower joint 8 is provided with the sealing baffle ring 34 capable of blocking the lower end of the installation cavity. When in use, the lower end of the installation cavity is sealed by arranging the sealing baffle ring 34, so that external liquid is prevented from entering and damaging internal elements. If necessary, a sealing ring may be disposed outside the sealing ring 34 between the outer connecting pipe 31 and the inner connecting pipe 30 to further ensure the sealing effect.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A piston-pushing type expansion packer is characterized by comprising a central tube, an upper joint, a first sheath, a first sleeve, a rubber cylinder, a second sleeve, a second sheath, a connecting tube, a piston assembly, a pressure relief assembly and a lower joint, wherein the rubber cylinder is sleeved outside the middle part of the central tube, the first sleeve sleeved outside the upper part of the central tube is arranged on the inner side of the upper end of the rubber cylinder, the upper end of the first sleeve is positioned above the rubber cylinder, the first sheath is sleeved outside the upper end of the rubber cylinder, a first inner ring platform with the lower end abutting against the upper end of the rubber cylinder is arranged on the inner side of the upper part of the first sheath, the upper joint is arranged on the inner side of the upper end of the first sheath corresponding to the upper end of the first inner ring platform, the inner side of the lower end of the upper joint is fixedly installed with the outer side of the upper end of the central tube, the lower end of the upper joint abuts against the upper end of the first sleeve and the upper end of the first inner ring platform, the inner side of the lower end of the rubber cylinder is provided with the second sleeve sleeved outside of the lower part of the central tube, the lower end of the second sleeve is positioned below the rubber sleeve, a second sheath is sleeved on the outer side of the lower end of the rubber sleeve, a second inner ring platform with the upper end abutting against the lower end of the rubber sleeve is arranged on the inner side of the lower portion of the second sheath, a liquid inlet channel is arranged between the inner side of the second inner ring platform and the second sleeve, a connecting pipe with the lower end positioned below the second sheath is arranged on the inner side of the lower end of the second sheath, the inner side of the upper end of the connecting pipe is fixedly installed with the outer side of the lower end of the central pipe, the upper end of the connecting pipe abuts against the lower end of the second sleeve and the lower end of the second inner ring platform, a hydraulic cavity communicated with the liquid inlet channel is arranged at the upper end of the connecting pipe corresponding to the lower position of the hydraulic cavity, a pressure relief hole communicated with the hydraulic cavity is arranged on the inner side of the upper portion of the connecting pipe corresponding to the position between the lower portion of the central pipe and the liquid inlet hole, a pressure relief assembly is arranged in the pressure relief hole, and the pressure relief hole sequentially comprises a first straight hole, a second straight hole and a second straight hole, a second sleeve, wherein the inner diameter of which is gradually reduced from inside to outside, Third straight hole and fourth straight hole, the pressure release subassembly includes the case, the disk seat, spacing ring and arc are protruding, first straight downthehole spacing ring that is equipped with, the downthehole disk seat that is equipped with of second straight, the downthehole inner of fourth straight passes third straight hole in proper order, the disk seat, the case of spacing ring, case inner fixed mounting has the arc protruding, the case middle part that corresponds the straight hole position of third is equipped with the outer loop platform, outer loop platform inner is little big-outside sealed conical surface in being, sealed conical surface can form sealedly with disk seat outer end inboard, the connecting pipe lower part is equipped with the installation cavity with hydraulic pressure chamber intercommunication, be equipped with the piston assembly that the upper end is located the hydraulic pressure intracavity and can upwards stretch out in the installation cavity, connecting pipe lower extreme outside fixed mounting has the lower clutch.
2. The piston-driven expansion packer of claim 1, wherein the piston assembly comprises a piston ring, a push ring, a linear motor and a power supply, the push ring, the linear motor and the power supply are sequentially arranged in the installation cavity from top to bottom, the upper end of the push ring is positioned in the hydraulic cavity, the piston ring is fixedly arranged at the upper end of the push ring, and the lower end of the push ring is fixedly arranged with the linear motor.
3. The piston-driven expansion packer of claim 2, wherein the piston assembly further comprises a control assembly, the control assembly is disposed in the installation cavity and comprises an acceleration sensor, a motor controller and a control unit, the motor controller is connected with the linear motor, and the control unit is respectively connected with the acceleration sensor and the motor controller.
4. The piston-driven expansion packer as claimed in claim 2 or 3, further comprising a retaining assembly, wherein at least one retaining assembly is circumferentially distributed in the installation cavity corresponding to the outer side position of the middle portion of the push ring, the retaining assembly comprises a spring, an electromagnet, retaining teeth, a T-shaped block, outer guide posts, and inner and outer baffles arranged at intervals inside and outside, the inner side of the outer baffle is provided with at least one electromagnet and at least two outer guide posts at intervals up and down, the inner baffle corresponding to the position of each outer guide post is provided with a movable groove with an outward opening, the movable groove is provided with a T-shaped block, each outer guide post is sleeved with a spring with an inner end sleeved on the T-shaped block, the inner baffle corresponding to the middle position of the left side of each movable groove is provided with a sliding hole communicated inside and outside, the sliding hole is internally provided with retaining teeth with an inner end positioned outside the sliding hole, and the outer end of the retaining teeth is fixedly installed with the inner side of the T-shaped block, the pushing ring corresponding to the position of the stopping teeth is provided with a stopping groove matched with the stopping teeth.
5. The piston-driven expansion packer of claim 4, wherein three backstop assemblies are circumferentially distributed in the installation cavity corresponding to the outer position of the middle of the push ring.
6. The piston-push type expansion packer as claimed in claim 2, 3 or 5, wherein the connection pipe comprises an inner connection pipe and an outer connection pipe, an inner side of an upper end of the inner connection pipe is fixedly fitted with an outer side of an upper end of the center pipe, an outer side of a lower end of the inner connection pipe is fixedly fitted with an inner side of an upper end of the lower joint, an outer side of an upper end of the outer connection pipe is fixedly fitted with an inner side of a lower end of the second sheath, the outer side of the connecting inner pipe and the inner side of the connecting outer pipe which correspond to the lower position of the liquid injection hole are respectively provided with a first fixed ring platform and a second fixed ring platform, the outer side of the upper part of the push ring is arranged between the first fixed ring platform and the second fixed ring platform, a hydraulic cavity is formed between the connecting inner pipe and the connecting outer pipe which correspond to the upper side positions of the first fixing ring table and the second fixing ring table, and an installation cavity is formed between the connecting inner pipe and the connecting outer pipe corresponding to the positions of the lower sides of the first fixing ring table and the second fixing ring table.
7. The piston-driven expansion packer as claimed in claim 4, wherein the connecting pipe comprises an inner connecting pipe and an outer connecting pipe, the inner side of the upper end of the inner connecting pipe is fixedly mounted to the outer side of the upper end of the central pipe, the outer side of the lower end of the inner connecting pipe is fixedly mounted to the inner side of the upper end of the lower joint, the outer side of the upper end of the outer connecting pipe is fixedly mounted to the inner side of the lower end of the second sheath, a first fixing ring table and a second fixing ring table are respectively disposed on the outer side of the inner connecting pipe and the inner side of the outer connecting pipe corresponding to the lower position of the fluid injection hole, a hydraulic chamber is formed between the inner connecting pipe and the outer connecting pipe corresponding to the upper position of the first fixing ring table and the second fixing ring table, and an installation chamber is formed between the inner connecting pipe and the outer connecting pipe corresponding to the lower position of the first fixing ring table and the second fixing ring table.
8. The piston-driven expansion packer as claimed in claim 1, 2, 3, 5 or 7, further comprising a sealing ring, wherein the connecting pipe corresponding to the upper end of the lower joint is provided with a sealing ring capable of sealing the lower end of the installation cavity.
9. The piston-driven expansion packer as claimed in claim 4, further comprising a sealing ring, wherein the connecting pipe corresponding to the upper end of the lower joint is provided with a sealing ring capable of sealing the lower end of the installation cavity.
10. The piston-driven expansion packer as claimed in claim 6, further comprising a sealing ring, wherein the connecting pipe corresponding to the upper end of the lower joint is provided with a sealing ring capable of sealing the lower end of the installation cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110692252.5A CN113250645B (en) | 2021-06-22 | 2021-06-22 | Piston-driven expansion packer |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117189024A (en) * | 2023-10-13 | 2023-12-08 | 中国石油大学(北京) | Oil pipe passing packer with corrugated and net-shaped composite steel skeleton |
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| CN117189024A (en) * | 2023-10-13 | 2023-12-08 | 中国石油大学(北京) | Oil pipe passing packer with corrugated and net-shaped composite steel skeleton |
| CN117189024B (en) * | 2023-10-13 | 2024-06-18 | 中国石油大学(北京) | Oil pipe passing packer with corrugated and net-shaped composite steel skeleton |
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