CN115977577A - Compression packer capable of being repeatedly set and unset and using method - Google Patents
Compression packer capable of being repeatedly set and unset and using method Download PDFInfo
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- CN115977577A CN115977577A CN202111200662.XA CN202111200662A CN115977577A CN 115977577 A CN115977577 A CN 115977577A CN 202111200662 A CN202111200662 A CN 202111200662A CN 115977577 A CN115977577 A CN 115977577A
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Abstract
The invention discloses a layered packer capable of repeatedly setting and unsetting and a method thereof, and the layered packer comprises an upper joint, an unsetting shear pin, a forward balance piston A, a central pipe, a well washing sleeve, a reverse balance piston A, a forward balance piston B, a reverse balance piston B, a sealing ring, a clamp spring, a setting shear pin, a retaining ring, a piston, a safety locking block, an unsetting piston cylinder, a connecting rod, an unsetting piston, a rubber cylinder seat, a rubber cylinder, a spacer ring, a rubber cylinder inner pipe, a rubber cylinder compression ring, a sealing ring, a pressure transmission pipe, a setting piston, a sealing cylinder, a spring, a setting piston cylinder, a safety shear pin, a sealing seat and the like. The packer provided by the invention does not need to be additionally provided with a backwashing channel, and after deblocking, the injection liquid can carry out backwashing operation through the deblocking pressure-transmitting hole. When the underground packer meets the underground complex condition and cannot realize the reverse well washing, the invention can also use the oil pipe above the upper joint to directly lift the central pipe to cut off the deblocking shear pin, and the liquid in the high-pressure cavity releases pressure into the oil pipe through the setting pressure release hole on the central pipe, thereby realizing the deblocking of the packer.
Description
Technical Field
The invention relates to a packer used in the field of oil exploitation, in particular to a compression packer capable of being repeatedly set and unset and a using method thereof.
Background
The victory low-permeability oil reservoir becomes an important position for stable production and high production of an oil field, the permeability of the reservoir is low, the oil reservoir is buried deeply, and a stratified water injection well has the characteristics of high water injection pressure and high temperature, so that the requirement of high temperature and high pressure resistance is provided for a packer. The comprehensive actions of injected water, formation fluid, the physics and the chemistry of a rock structure and the like cause the problems of high reservoir water injection blocking speed, high water injection pressure rise, short effective reservoir water injection period and the like, in order to recover the water absorption capacity of a reservoir, the main blocking removal measure is acidification chemical blocking removal, the scheme needs to be started up and then put into a layered acidification pipe column for layered acidification, the operation occupies a long well period, and the cost is high. In order to solve the problem, the invention develops the repeated setting and unsetting packer which can meet the requirements, can successfully realize the control of either layer of layered water injection and layered acidification by repeated setting and unsetting actions when a well is put down once, and has the characteristics of reducing the operation cost and shortening the well occupying period of operation.
In the prior art, CN211924128U discloses a piston large-drift-diameter hydraulic recoverable packer, and belongs to the technical field of downhole operation tools of oil and gas wells. The sealing device comprises a central tube, an anchoring mechanism, a sealing mechanism, a setting locking mechanism and a deblocking mechanism, wherein the anchoring mechanism is arranged on the excircle of the central tube, the sealing mechanism is arranged on the central tube below the anchoring mechanism, the setting locking mechanism is arranged on the central tube below the sealing mechanism, and the deblocking mechanism is sleeved on the setting locking mechanism through a connecting sleeve. This packer sets up through the twin piston who sets up locking mechanical system and seals the structure, can effectively solve current packer because of the single piston mode exist set power not enough, set the unstable problem of performance, this packer is retrieved simply, can used repeatedly, for later stage pit shaft maintenance transformation facilitates, especially adapted oil gas well borehole operation.
CN213331008U discloses a mechanical self-checking packer, which is additionally provided with a group of upper rubber sleeve groups on the basis of a traditional packer, and a fixed sleeve and a communication sleeve are additionally arranged between the upper rubber sleeve group and the lower rubber sleeve group; a sliding spline fixed at the lower end of the upper joint and a sliding key chute on the inner wall of the fixed sleeve form a sliding pair and can transmit torque; a pressure transmitting hole is processed on the communicating sleeve and is used for communicating the central channel 20 with the annular space in the sleeve; when the device works, the leakage detection function of the casing can be realized only by connecting any ball seat with the same size; meanwhile, the sleeve is convenient to unseal and can be repeatedly used under the condition that a plurality of leakage tests of the sleeve are required; the structure is simple, and the packer can be used with part of parts of the RTTS packer; the device can be repeatedly used for multiple times, and multiple parts of the sleeve are sequentially subjected to leakage testing and channeling testing; the setting condition of the packer can be explained in detail only by connecting a ball seat, and the reason of incomplete setting is judged to be incomplete cementing or leakage of a casing; when the ball seat is not connected, the packer can be used as a common packer, and the universality is strong.
CN113047805A discloses a self-sealing type oil field packer for oil field exploitation, and relates to the field of oil field packers. This proclaim oneself type oil field packer of oil field, including center tube and last sealing member, center tube upper portion pipe wall evenly distributed has the spout, the interior week of outer tube upper portion slides down and is provided with the sliding sleeve, the upper portion of sliding sleeve slides and sets up at the interior week of the lower part of last outer tube, the interior week of sliding sleeve upper end is provided with spacing draw-in groove, the upper portion periphery is provided with the packing element in the sliding sleeve, outer tube bottom evenly distributed has logical groove down, center tube bottom periphery evenly distributed has the third spring, go up sealing member top fixedly connected with screw post, go up sealing member lower extreme fixedly connected with seal pin, go up sealing member middle part external diameter less than or equal to center tube internal diameter. Through the fixed setting of packer, make the packing element can fine use, avoid the packing element to lead to the leakproofness to disappear or warp because of pressure deformation, the packing element can used repeatedly, is worth wideling popularize.
CN113356787A discloses a recoverable downhole packer resistant to high temperature and high pressure, which comprises a central pipe; the power part comprises a first shell, a cylinder body, a piston, a sliding sleeve and a control pipeline; the first slip part can be supported towards the inner wall of the oil well casing under the downward pressing and jacking action of the sliding sleeve and can synchronously realize downward movement along with the downward movement of the sliding sleeve; the packing part comprises a packing rubber cylinder, a high temperature resistant rubber cylinder and a base plate, wherein the packing rubber cylinder is sleeved on the central pipe and is positioned below the first slip part; the second slip part can be pressed and pushed down by the sliding sleeve and supports the inner wall of the oil well casing; the second shell is fixed at the bottom end of the central pipe and is fixedly connected with the bottom end of the first slip part. The packer provided by the invention is simple in structure, the structural stability is improved by adopting two clamping connection, and the high-pressure resistance is stronger; the high temperature resistance is improved by arranging the high temperature resistant rubber cylinder; the invention overcomes the problems of complex packer structure, high setting and unsealing difficulty, long period, high operation cost and the like in the prior art.
But the packer can not realize efficient repeated setting and deblocking and also has the problem of incomplete deblocking.
Disclosure of Invention
The invention aims to provide a layered packer tool capable of repeatedly setting and unsetting, and relates to the technical field of layered acidification and layered water injection. The packer adopts a high-pressure setting mode when setting for the first time, can adopt a low-pressure repeated setting mode after normal work, and prevents the packer from automatically deblocking according to dynamic balance after the packer is set, so that the damage to a rubber sleeve of a lower packer caused by the creeping of an upper pipe column during axial load, axial vibration load, water injection pressure and temperature fluctuation is fundamentally eliminated, and the rubber sleeve is always kept in a permanent compression state under the action of a connecting rod, a setting piston and a spring during normal construction; when a well is washed, the rubber cylinder overcomes the spring force under the action of the unsealing piston and can release pressure, recover and unseal, and the large-channel well washing is carried out; when the normal construction is recovered, the rubber cylinder can be repeatedly set and sealed under low pressure.
In order to achieve the purpose, the invention adopts the following technical scheme that the layered packer tool capable of repeatedly setting and unsetting mainly comprises an upper joint, an unsetting shear pin, a forward balance piston A, a central pipe, a well washing sleeve, a reverse balance piston A, a forward balance piston B, a reverse balance piston B, a sealing ring, a snap spring, a setting shear pin, a baffle ring, a piston, a safety locking block, an unsetting piston cylinder, a connecting rod, an unsetting piston, a rubber cylinder seat, a rubber cylinder, a spacer ring, a rubber cylinder inner pipe, a rubber cylinder pressure ring, a sealing ring, a pressure transmission pipe, a setting piston, a sealing cylinder, a spring, a setting piston cylinder, a safety shear pin, a sealing seat, a T-shaped sealing element, a pressure cap, a sealing plug and a lower joint.
The upper joint of the pipe column is connected with the central pipe and the well washing sleeve, the central pipe is connected in a threaded mode, and the upper joint and the well washing sleeve are fixed through the deblocking shear pins. A forward balance piston A, a reverse balance piston A, a forward balance piston B and a reverse balance piston B are arranged in the central pipe and the well washing sleeve cavity, and each balance piston is sealed by a sealing ring.
The bottom of the central tube is in threaded connection with the lower connector, the clamp spring is arranged in the middle of the central tube, and the clamp spring can be embedded into a groove formed by the baffle ring and the piston when the seat seal is balanced, so that a fixing effect is achieved. The retaining ring and the deblocking piston cylinder are fixed together through a setting shear pin. The outside of the middle section of the central tube is provided with a notch, and a safety locking block is arranged in the notch. The lower end of the safety locking block is provided with a connecting rod capable of moving up and down, an unsealing piston and a rubber cylinder seat are arranged between the unsealing piston cylinder and the connecting rod, the rubber cylinder seat is connected with the inner pipe of the rubber cylinder through threads, and the inner pipe of the rubber cylinder is sleeved with the rubber cylinder, a spacer ring and a rubber cylinder pressure ring. The lower end of the rubber cylinder compression ring is in threaded connection with the setting piston, and a sealing ring is arranged in the inner cavity of the rubber cylinder compression ring. The sealing ring is connected with the inner tube of the rubber cylinder and the pressure transmission tube through threads.
The setting piston is in threaded connection with the setting piston cylinder, a rubber ring is used for sealing, and the setting piston cylinder and the sealing cylinder are fixed through a safety shear pin. A spring is arranged in a cavity defined by the connecting rod, the pressure transmission pipe and the sealing barrel, the lower end of the connecting rod is in threaded connection with the sealing seat, the sealing seat is in threaded connection with the pressure cap, and the sealing seat and the pressure cap form a T-shaped hole for accommodating a T-shaped sealing element. The bottom end of the sealing cylinder is in threaded connection with the sealing plug.
The packer provided by the invention does not need to be additionally provided with a backwashing channel, and after deblocking, the injection liquid can carry out backwashing operation through the deblocking pressure-transmitting hole. When the underground packer meets the underground complex condition and cannot realize the reverse well washing, the invention can also use the oil pipe above the upper joint to directly lift the central pipe to cut off the deblocking shear pin, and the liquid in the high-pressure cavity releases pressure into the oil pipe through the setting pressure release hole on the central pipe, thereby realizing the deblocking of the packer.
Drawings
FIG. 1 is a schematic diagram of a re-setting and unsetting zonal packer tool.
In the figure: 1-upper joint, 2-deblocking shear pin, 3-forward balance piston A, 4-central pipe, 5-well washing sleeve, 6-reverse balance piston A, 7-forward balance piston B, 8-reverse balance piston B, 9-sealing ring, 10-snap spring, 11-setting shear pin, 12-baffle ring, 13-piston, 14-safety locking block, 15-deblocking piston cylinder, 16-connecting rod, 17-deblocking piston, 18-rubber cylinder seat, 19-rubber cylinder, 20-isolating ring, 21-rubber cylinder inner pipe, 22-rubber cylinder compression ring, 23-sealing ring, 24-pressure transmission pipe, 25-setting piston, 26-sealing cylinder, 27-spring, 28-setting piston cylinder, 29-safety shear pin, 30-sealing seat, 31-T type sealing element, 32-pressing cap, 33-sealing plug, 34-lower joint
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.
The first embodiment is as follows:
a certain oil well adopts a layered packer capable of repeatedly setting and unsetting, and the tool mainly comprises an upper joint, an unsetting shear pin, a forward balance piston A, a central pipe, a well washing sleeve, a reverse balance piston A, a forward balance piston B, a reverse balance piston B, a sealing ring, a clamp spring, a setting shear pin, a retaining ring, a piston, a safety locking block, an unsetting piston cylinder, a connecting rod, an unsetting piston, a rubber cylinder seat, a rubber cylinder, a spacing ring, a rubber cylinder inner pipe, a rubber cylinder pressure ring, a sealing ring, a pressure transmission pipe, a setting piston, a sealing cylinder, a spring, a setting piston cylinder, a safety shear pin, a sealing seat, a T-shaped sealing element, a pressure cap, a sealing plug and a lower joint.
The upper joint of the pipe column is connected with the central pipe and the well washing sleeve, the central pipe is connected in a threaded mode, and the upper joint and the well washing sleeve are fixed through the deblocking shear pins. A positive balance piston A, a reverse balance piston A, a positive balance piston B and a reverse balance piston B are arranged in the central pipe and the cavity of the well washing sleeve, and each balance piston is sealed by a sealing ring.
The bottom of the central tube is in threaded connection with the lower connector, the clamp spring is arranged in the middle of the central tube, and the clamp spring can be embedded into a groove formed by the baffle ring and the piston when the seat seal is balanced, so that a fixing effect is achieved. The retaining ring and the deblocking piston cylinder are fixed together through a setting shear pin. The outside of the middle section of the central tube is provided with a notch, and a safety locking block is arranged in the notch. The lower end of the safety locking block is provided with a connecting rod capable of moving up and down, an unsealing piston and a rubber cylinder seat are arranged between the unsealing piston cylinder and the connecting rod, the rubber cylinder seat is connected with the inner pipe of the rubber cylinder through threads, and the inner pipe of the rubber cylinder is sleeved with the rubber cylinder, a spacer ring and a rubber cylinder pressure ring. The lower end of the rubber cylinder compression ring is in threaded connection with the setting piston, and a sealing ring is arranged in the inner cavity of the rubber cylinder compression ring. The sealing ring is connected with the inner tube of the rubber cylinder and the pressure transmission tube through threads.
The setting piston is in threaded connection with the setting piston cylinder, a rubber ring is used for sealing, and the setting piston cylinder and the sealing cylinder are fixed through a safety shear pin. A spring is arranged in a cavity defined by the connecting rod, the pressure transmission pipe and the sealing barrel, the lower end of the connecting rod is in threaded connection with the sealing seat, the sealing seat is in threaded connection with the pressure cap, and the sealing seat and the pressure cap form a T-shaped hole for accommodating a T-shaped sealing element. The bottom end of the sealing cylinder is in threaded connection with the sealing plug.
Example two:
the packer is used for a certain oil well, and the basic flow is as follows:
1. setting seal
1. Beginning to set
The power liquid acts on the setting piston 25 through the liquid inlet hole 1 from the setting pressure relief hole, the pressure reaches about 8MPa, the safety shear pin 29 is cut off, the setting piston 25 drives the setting piston cylinder 28 and the rubber cylinder compression ring 22 to move left to compress the rubber cylinder, and setting is started.
2. Setting force balance
Power fluid acts on the piston 13 through the left fluid inlet hole 2 to drive the baffle ring 12 to shear the setting shear pin 11 to move left, the limit is realized through the central pipe 4, meanwhile, the snap spring 10 is embedded into a groove formed by the baffle ring 12 and the piston 13 to prevent the baffle ring 12 and the piston 13 from moving right, the safety lock block 14 is released to prepare for the right movement of the connecting rod 16.
Forward balance piston A3, forward balance piston B7 move to the left, and the effort is used on well washing cover 5, play the balancing act for balanced setting in-process produces decurrent thrust, prevent to set the automatic deblocking of in-process packer.
And completing the setting of the packer when the pressure reaches 16-20 MPa.
3. Locking seal
After the oil pipe is decompressed, the connecting rod 16, the sealing seat 30, the T-shaped sealing element 31 and the pressing cap 32 move rightwards under the elastic force of the spring 27, the T-shaped sealing element 31 moves rightwards into an inner hole of the sealing plug 33 to realize sealing, and the pressure in a packer setting cavity (enclosed by the connecting rod 16, the rubber sleeve inner tube 21, the setting piston 25, the sealing sleeve 26, the sealing seat 30, the T-shaped sealing element 31, the pressing cap 32 and the sealing plug 33) is ensured to be always in a high-pressure state, so that the packer rubber sleeve is in a permanent compression sealing state.
2. Repeated setting and unsealing
1. Back flushing deblocking
When a well needs to be backwashed, power liquid acts on the deblocking piston 17 from the liquid inlet hole 5 of the deblocking piston cylinder 15 to drive the connecting rod 16, the sealing seat 30, the T-shaped sealing element 31 and the pressing cap 32 to move left against the spring force, after the T-shaped sealing element 31 is separated from the inner sealing surface of the sealing plug 33, liquid in the high-pressure cavity is decompressed into the oil pipe through the setting decompression hole of the central pipe 4, the packer deblocking is realized, a well washing channel is established, and smooth well washing is guaranteed.
2. Repeated setting
And (2) re-pressurizing from the interior of the oil pipe, enabling liquid to still act on the setting piston 25 from a setting pressure relief hole of the central pipe (4) through the liquid inlet hole 1 on the pressure transmission pipe 24, compressing the rubber cylinder to realize setting, and after pressure relief, enabling the connecting rod 16, the sealing seat 30, the T-shaped sealing element 31 and the pressure cap 32 to move to the right into an inner sealing hole of the sealing plug 33 under the elastic action of the spring 27 to realize high-pressure liquid sealing and ensure that the packer is always in a sealing state.
3. Deblocking pipe string
1. And (5) deblocking the reverse flushing well.
The steps are the same as above, and the pipe column is directly lifted after the packer is unsealed.
2. Lifting pipe column unsealing
If the backwashing well is not communicated, the central pipe 4 can be directly lifted up through the oil pipe above the upper joint 1, after the deblocking shear pin 2 is cut off, the central pipe 4 moves upwards to drive the T-shaped sealing element 31 to move leftwards, and after the T-shaped sealing element 31 moves out of the inner sealing hole of the sealing plug 33, liquid in the high-pressure cavity is decompressed into the oil pipe through the setting pressure release hole on the central pipe 4, so that the packer deblocking is realized. Then the whole pipe column can be pulled out by continuously lifting.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. The utility model provides a can repeatedly set up layering packer of deblocking which characterized in that: comprises an upper joint (1), a forward balance piston A (3), a central pipe (4), a well washing sleeve (5), a reverse balance piston A (6), a forward balance piston B (7) and a reverse balance piston B (8),
the upper joint (1) is connected with a central pipe (4) and a well washing sleeve (5), and the cavity of the central pipe (4) and the well washing sleeve (5) is internally provided with a forward balance piston A (3), a reverse balance piston A (6), a forward balance piston B (7) and a reverse balance piston B (8).
2. The re-setting and unsetting zonal packer of claim 1, wherein: still include lower clutch (34), jump ring (10), sit and seal shear pin (11), keep off ring (12) and deblocking piston cylinder (15), center tube (4) bottom with lower clutch (34) threaded connection, jump ring (10) set up on center tube (4), keep off ring (12) with deblocking piston cylinder (15) are passed through it is fixed to sit to seal shear pin (11).
3. The re-setting and unsetting zonal packer of claim 2, wherein: center tube (4) middle section outside has a notch, is equipped with safe locking piece (14) in, but safe locking piece (14) lower extreme is equipped with connecting rod (16) of up-and-down motion deblocking piston cylinder (15) with be equipped with deblocking piston (17) and packing element seat (18) between connecting rod (16), packing element seat (18) are connected with packing element inner tube (21) through the screw thread, the cover has packing element (19), spacer ring (20) and packing element clamping ring (22) on packing element inner tube (21), packing element clamping ring (22) lower extreme and setting piston (25) threaded connection, packing element clamping ring (22) inner chamber is equipped with sealing ring (23), sealing ring (23) are through threaded connection packing element inner tube (21).
4. The re-settable unset layered packer of claim 3, wherein: the setting piston (25) is in threaded connection with a setting piston cylinder (28) and sealed by using a rubber ring, the setting piston cylinder (28) and the sealing cylinder (26) are fixed through a safety shear pin (29), a spring (27) is arranged in a cavity defined by the connecting rod (16) and the sealing cylinder (26), and the lower end of the connecting rod (16) is in threaded connection with a sealing seat (30).
5. The re-setting and unsetting zonal packer of claim 4, wherein: the pipe column upper joint (1) is connected with the central pipe (4) and the well washing sleeve (5) in a threaded mode.
6. The re-setting and unsetting zonal packer of claim 5, wherein: and (3) fixing the upper joint (1) and the well washing sleeve (5) by using a deblocking shear pin (2).
7. The re-setting unset zonal packer of any of claims 1-6, wherein: and the forward balance piston A (3), the reverse balance piston A (6), the forward balance piston B (7) and the reverse balance piston B (8) are sealed by using a sealing ring (9).
8. A method of using a re-setting and unsetting zonal packer as described in any of claims 1-7, comprising the steps of:
1. setting seal
(1) And then the setting is started to carry out,
(2) the setting force is balanced, and the setting force is balanced,
(3) the locking and sealing are carried out on the upper cover plate,
2. repeated setting and unsealing
(1) And the reverse well-flushing is performed for deblocking,
(2) and the user can repeatedly set the seat for sealing,
3. deblocking pipe string
(1) And the reverse well-flushing is performed for deblocking,
(2) and unsealing the lifting pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200662.XA CN115977577A (en) | 2021-10-14 | 2021-10-14 | Compression packer capable of being repeatedly set and unset and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200662.XA CN115977577A (en) | 2021-10-14 | 2021-10-14 | Compression packer capable of being repeatedly set and unset and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115977577A true CN115977577A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111200662.XA Pending CN115977577A (en) | 2021-10-14 | 2021-10-14 | Compression packer capable of being repeatedly set and unset and using method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117090536A (en) * | 2023-10-19 | 2023-11-21 | 大庆地八五石油技术开发有限公司 | Independent compression type multi-rubber-cylinder packer |
| CN117287142A (en) * | 2023-11-27 | 2023-12-26 | 西安洛科电子科技股份有限公司 | Packer capable of repeating electric setting and electric deblocking |
| CN117927179A (en) * | 2024-03-22 | 2024-04-26 | 西安洛科电子科技股份有限公司 | Compression packer capable of repeating wellhead pressurization setting and electric deblocking |
| CN118242016A (en) * | 2024-05-27 | 2024-06-25 | 西安思坦仪器股份有限公司 | Electric backwashing packer |
-
2021
- 2021-10-14 CN CN202111200662.XA patent/CN115977577A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117090536A (en) * | 2023-10-19 | 2023-11-21 | 大庆地八五石油技术开发有限公司 | Independent compression type multi-rubber-cylinder packer |
| CN117090536B (en) * | 2023-10-19 | 2024-01-05 | 大庆地八五石油技术开发有限公司 | Independent compression type multi-rubber-cylinder packer |
| CN117287142A (en) * | 2023-11-27 | 2023-12-26 | 西安洛科电子科技股份有限公司 | Packer capable of repeating electric setting and electric deblocking |
| CN117287142B (en) * | 2023-11-27 | 2024-03-12 | 西安洛科电子科技股份有限公司 | Packer capable of repeating electric setting and electric deblocking |
| CN117927179A (en) * | 2024-03-22 | 2024-04-26 | 西安洛科电子科技股份有限公司 | Compression packer capable of repeating wellhead pressurization setting and electric deblocking |
| CN117927179B (en) * | 2024-03-22 | 2024-06-04 | 西安洛科电子科技股份有限公司 | Compression packer capable of repeating wellhead pressurization setting and electric deblocking |
| CN118242016A (en) * | 2024-05-27 | 2024-06-25 | 西安思坦仪器股份有限公司 | Electric backwashing packer |
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