CN105443064A - Underground controllable self-expansion casing patching pipe - Google Patents
Underground controllable self-expansion casing patching pipe Download PDFInfo
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- CN105443064A CN105443064A CN201511010030.1A CN201511010030A CN105443064A CN 105443064 A CN105443064 A CN 105443064A CN 201511010030 A CN201511010030 A CN 201511010030A CN 105443064 A CN105443064 A CN 105443064A
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- pipe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
Abstract
The invention relates to an underground controllable self-expansion casing patching pipe which comprises a patching pipe body and a controllable underground tool release device. The patching pipe body is composed of a rubber inner container, a memory alloy ring and a leaking stoppage rubber barrel. The inner surface of the leaking stoppage rubber barrel and the outer surface of the rubber inner container are adhesively connected through a temperature resistance adhesive. The controllable underground tool release device at least comprises a temperature controller, a cable, a heat pipe, a heating winding wire, a stainless steel protective pipe, a thermocouple, a centering barrel and a conical limiting barrel. The stainless steel protective pipe is located inside the centering barrel. The heat pipe is located inside the stainless steel protective pipe. The heating winding wire is evenly wound around the heat pipe. The thermocouple is fixed to the inner wall of the centering barrel. The thermocouple and the heating winding wire are electrically connected with the temperature controller through the cable. The centering barrel is sleeved with the patching pipe body which is clamped to the top of the conical limiting barrel. Casing patching work can be completed without hydraulic expansion or gunpowder explosion or other means, operation is convenient, and construction is safe.
Description
Technical field
The present invention relates to oil well casing recovery technique field, be specifically related to a kind of DH controllable self-expanding casing patching pipe.
Background technology
Oil-water well is because of after a variety of causes casing damage, and formation water pours in down a chimney and causes oil-water well closing well, well pattern to destroy into oil reservoir and remaining oil cannot the problem such as extraction, and being affects the key factor that oil well normally produces.
From last century, many oil fields of the U.S. and Middle East oil-producing country occur the fifties that casing corrosion damages problem, the control measures mainly taked has expand tube subsidy, sidetracking, water pack off etc.From last century the seventies, there is the casing failure that casing deformation, rock salt wriggling and electrochemical corrosion etc. cause in China Jilin, Jiang-Han Area and the oil field such as grand celebration, long celebrating in succession.
The technology such as the well cementation of top water exclusion, secondary, casing patching reinforcing, small casing well workover and chemical plugging are had to the method that the broken well of cover is administered.Casing expandable subsidy technology can be divided into again two class subsidy technology of bellows and solid expansion pipe.
Bellows subsidy know-why enters casing leakage position by under mild steel bellows, produces axial force, make the swollen circle of bellows by hydraulic power or gas power instrument, squeezes and be attached to leakage internal surface of casing, form sealant by cementing agent, shutoff leakage sleeve pipe.Last century the nineties, U.S. HOMCO(Huo Muke) company etc. once carried out application test in the U.S., China.
Solid expansion pipe proposes technical though by shell (Shell) company in 1991, and establishment hundreds of millions very (Enventure) company is formed a partnership by shell in 1997 and Halliburton energy company, and expansion tube technique reached business application level in 1999.Hundreds of millions strange (Enventure) companies have carried out expansion tube application for global 45 companies aboveground more than 215 mouthfuls.E2TECH company is mainly engaged in research and the manufacture of expandable screen (EST), mainly solves cave-in, sand control problem.Petroline company is proposed expandable sand control screen pipe (ESS) technology, applies in the Oil/gas Well of open hole well and alternative external gravel filling sand-proof.All there are this technology in the companies such as Vad good fortune, Halliburton, Bake, define respective product and technology series.
From the beginning of this century, bulged tube technology enters China and starts application, is developed rapidly, all has application in oil fields such as grand celebration, North China, Henan, Central Plains, Qinghai, huge port, Jiangsu.Domestic have PetroChina Company Limited. explores total institute christmas equipment institute, Shanghai GuanliBu Petroleum Equipment Co., Ltd, Shengli Oil Field Shengji Petroleum Equipment Co., Ltd, Deng Duojia unit of Dagang Oilfield drilling Process research carry out bulged tube technology application study, technological service or product manufacturing at present, research defines the expansion tube series of multiple material and relevant implementing process, and product comprises product and the kits such as oil drilling, well workover, oil recovery all size solid expansion pipe, expansion slot sand-proof pipe, expansion hanger, shape-memory material.According to incompletely statistics, the domestic total construction well number of expansion tube repairing casing that utilizes has exceeded 550 mouthfuls.There is relevant lot of documents report both at home and abroad.
" Oilfields engineering " has related introduction in December, 2006 to " development and apply of external bulged tube technology ".CORROSION2000 meeting also has relevant discussion to solid expansion pipe technical research and application at Paper00164 " Insituexpansionofcasingandtubing:Effectonmechanicalprope rtiesandresistancetosulfidestresscracking ".
The patent of expandable casing patching technology has a lot of item both at home and abroad at present.Such as " a kind of hydraulic variable diameter sleeve pipe swelling pressure method and equipment thereof " (CN1807830A), this technology is by, have certain thickness and plasticity good steel pipe lower going-into-well trap damage section less than casing inner diameter, the mode expanded by hydraulic expansion cone cold-extruded makes steel pipe generation plastic deformation, subsidize on the inwall of damage sleeve pipe, with the sleeve pipe close adhesion damaged, recover sleeve pipe integrality, reach the object of repairing casing.Subsidy material used mainly contains seamless steel pipe and ERW ERW, is carbon steel tubing.The shortcoming of the method is: (1), when hydraulic expansion cone moves forward, origin of force will be fixed on internal surface of sleeve pipe, and its anchor fluke can cause new damage to sleeve pipe.(2) hydraulic cold squeezes extension fixture more complicated, easily goes wrong in construction, makes swollen cone be stuck in patching tube, both can pull out out, can not continue again to expand to advance, and causes down-hole accident.(3) the method complex procedures, costly, subsidy section is short, and construction risk is large.
Another kind of casing patching method is sleeve pipe explosive patching process.Such as " explosive patching process of oil well casing " (CN1115827A), the metal seamless tube adopting external diameter to be less than casing inner diameter is placed in the sleeve pipe of needs subsidy, in the huge energy that explosion time discharges, seamless pipe pipe is swollen with explosive or gunpowder, plastic strain occurs and subsidizes internal surface of sleeve pipe.The shortcoming of the method is that the energy that (1) blast produces is difficult to control, and the too small object not reaching subsidy, crosses conference and cause casing deformation or damage.(2) get angry in oil well, dangerous large, once there be associated gas to exist, be easy to the serious accidents such as oil well catches fire occur.
Summary of the invention
The object of the invention is to overcome the defect existed at present, a kind of patching tube is provided to have self-expanding characteristic, expansion thixotroping temperature-controllable, without the need to just casing patching operation can be completed by the means such as hydraulic dilatation or gunpowder explosion, easy to operate, the DH controllable self-expanding casing patching pipe of construction safety.
The invention provides a kind of DH controllable self-expanding casing patching pipe, a kind of DH controllable self-expanding casing patching pipe, comprises patching tube body and controllable type downhole tool releasing device for this reason;
Described patching tube body is made up of rubber liner, memorial alloy ring, leak stopping rubber tube, and the inner surface of described leak stopping rubber tube and the external surface of rubber liner are by heatproof adhesives, and the external surface of leak stopping rubber tube is also coated with heatproof adhesive; Described memorial alloy ring is between leak stopping rubber tube and rubber liner;
Described controllable type downhole tool releasing device at least comprises a temperature controller, cable, heat pipe, heating coiling, stainless steel protection pipe, thermocouple, righting cylinder, conical limit cylinder; Described conical limit cylinder is connected to the below of righting cylinder, described stainless steel protection pipe is positioned at the inside of righting cylinder, described heat pipe is positioned at the inside of stainless steel protection pipe, described heating coiling uniform winding is in the outside of heat pipe, be filled with dielectric between heat pipe and stainless steel protection pipe, described thermocouple is fixed on the inwall of righting cylinder; Described thermocouple and heating coiling are electrically connected by cable with temperature controller respectively;
Described patching tube body is set in outside righting cylinder, and is stuck in the top of conical limit cylinder.
Described leak stopping rubber tube inwall is evenly distributed with trapezoidal groove, and described memorial alloy ring embeds in trapezoidal groove.
Described memorial alloy ring is obtained by a kind of material in Ti-Ni alloy, iron-nickel alloy, chrome-nickel.
Described righting cylinder and conical limit cylinder are made up of stainless steel material, and righting cylinder and conical limit cylinder are fixedly connected by welding.
Described controllable type downhole tool releasing device also comprises one for detecting borehole pressure pressure gauge.
The expansion temperature of described patching tube body is 80 DEG C.
Beneficial effect of the present invention:
1, DH controllable self-expanding casing patching pipe has self-expanding characteristic, and expansion thixotroping temperature according to hole condition training setting, generally can treat subsidy bushing temperature height 10-20 DEG C than correspondence.Without the need to adopting the means such as hydraulic dilatation or gunpowder explosion, can casing repairing be realized, easy to operate, construction safety.
2, memorial alloy ring corrosion resistance is strong, and specific strength is high, after casing patching, affects little, difficult drop-off, long service life by the factor such as temperature, corrosive medium.Memorial alloy ring is filamentary material, easy to process, and low price, cost performance is high.
3, the Bulking Time of patching tube can be controlled by ground temperature controller, avoids down in process because the change of well temperature causes the potential safety hazards such as patching tube expands suddenly, easy construction, high safety.
4, subsidize tube wall thin, subsidy rear sleeve latus rectum is substantially constant, does not affect subsequent production and operation.
5, downhole tool releasing device design is ingenious, and structure is simple, and easy construction, can judge the self-expanding state of patching tube very accurately.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of patching tube body in the present invention;
Fig. 3 is the sectional structure schematic diagram of patching tube body in the present invention;
Fig. 4 is the structural representation of controllable type downhole tool releasing device in the present invention.
Description of reference numerals: 1, rubber liner; 2, memorial alloy ring; 3, leak stopping rubber tube; 4, trapezoidal groove; 5, temperature controller; 6, cable; 7, heat pipe; 8, heating coiling; 9, dielectric; 10, stainless steel protection pipe; 11, thermocouple; 12, righting cylinder; 13, conical limit cylinder; 14, pressure gauge.
Detailed description of the invention
Embodiment 1:
A kind of DH controllable self-expanding casing patching pipe as shown in Figure 1, comprises as Fig. 2,3 patching tube bodies and as Fig. 4 controllable type downhole tool releasing device;
Patching tube body is as described in Figure 2 made up of rubber liner 1, memorial alloy ring 2, leak stopping rubber tube 3, the inner surface of described leak stopping rubber tube 3 and the external surface of rubber liner 1 are by heatproof adhesives, and the external surface of leak stopping rubber tube 3 is also coated with heatproof adhesive; Described memorial alloy ring 2 is between leak stopping rubber tube 3 and rubber liner 1; Memorial alloy ring 2 is processed by shape memory alloy material.Shape memory alloy material, through Composition Design, preparation and repetition training process, can produce shape memory effect, can return to rapidly original shape memory under specific high temperature.The distortion of this shape has irrecoverability;
Controllable type downhole tool releasing device as described in Figure 4 at least comprises a temperature controller 5, cable 6, heat pipe 7, heating coiling 8, stainless steel protection pipe 10, thermocouple 11, righting cylinder 12, conical limit cylinder 13; Described conical limit cylinder 13 is connected to the below of righting cylinder 12, described stainless steel protection pipe 10 is positioned at the inside of righting cylinder 12, described heat pipe 7 is positioned at the inside of stainless steel protection pipe 10, described heating coiling 8 uniform winding is in the outside of heat pipe 7, be filled with dielectric 9 between heat pipe 7 and stainless steel protection pipe 10, described thermocouple 11 is fixed on the inwall of righting cylinder 12; Described thermocouple 11 and heating coiling 8 are electrically connected by cable 6 with temperature controller 5 respectively;
Described patching tube body is set in outside righting cylinder 12, and is stuck in the top of conical limit cylinder 13.
At work, be first coated in by heatproof adhesive on leak stopping rubber tube 3 outer wall, then penetrated by patching tube in cable 6 and righting cylinder 12, rear end is against in the middle part of conical limit cylinder 13.Cable 6 is driven by patching tube and controllable type downhole tool releasing device down to casing damage position by well maintenance vehicle, opening temp. control instrument control down-hole heating-up temperature, when memorial alloy ring 2 reaches trained temperature, the rapid self-expanding of meeting, cause outside leak stopping rubber tube 3 to expand, subsidize on the inwall of damaged sleeve pipe, now pressure gauge numerical value can be undergone mutation, show to subsidize successfully, thus reach sealing and plugging, repair the object of damaged sleeve pipe.Heatproof adhesive is coated with 4 and overlays on leak stopping rubber tube outside, has sealing and adhesive effect, strengthens repairing effect.
Embodiment 2:
On the basis of embodiment 1, leak stopping rubber tube 3 inwall as described in Fig. 3 is evenly distributed with trapezoidal groove 4, and described memorial alloy ring 2 embeds in trapezoidal groove 4; Leak stopping rubber tube 3) inwall is evenly distributed with trapezoidal groove 4, play position-limiting action.Memorial alloy ring 2 embeds in trapezoidal groove 4, and rubber liner 1 is bonding firmly by heatproof adhesive 4 with leak stopping rubber tube 3; Shape memory alloy material composition mainly contains Ti-Ni alloy, iron-nickel alloy, chrome-nickel etc.Marmem ring 2 external diameter is generally Φ 38mm-Φ 244.5mm.According to treating subsidy sleeve pipe specification and requirement of strength, memorial alloy ring wall is thick in 3mm-10mm; Described righting cylinder 12 is made up of stainless steel material with conical limit cylinder 13, and righting cylinder 12 and conical limit cylinder 13 are fixedly connected by welding; Described controllable type downhole tool releasing device also comprises one for detecting borehole pressure pressure gauge 14; Righting cylinder 12 and conical limit cylinder 13 are formed by stainless steel welded, can ensure that patching tube enters under vertical, reduce and casing wear; After patching tube self-expanding, can extend there through, instrument is tripped out ground.Pressure gauge 14 is placed on ground, can accurately read lower end suspending weight by cable 6.
At work, be first coated in by heatproof adhesive on leak stopping rubber tube 3 outer wall, then penetrated by patching tube in cable 6 and righting cylinder 12, rear end is against in the middle part of conical limit cylinder 13.Drive cable 6 by patching tube and controllable type downhole tool releasing device down to casing damage position by well maintenance vehicle, opening temp. control instrument control down-hole heating-up temperature, observe pressure gauge and change.When memorial alloy ring 2 reaches trained temperature, the rapid self-expanding of meeting, causes outside leak stopping rubber tube 3 to expand, subsidy is on the inwall of damaged sleeve pipe, now pressure gauge numerical value can be undergone mutation, and shows to subsidize successfully, thus reaches sealing and plugging, repairs the object of damaged sleeve pipe.Heatproof adhesive is coated with 4 and overlays on leak stopping rubber tube outside, has sealing and adhesive effect, strengthens repairing effect.
Embodiment 3:
Certain oil field WangX-YJing, well depth 2130m, sleeve pipe specification 139.7mm × 9.17mm, casing damage position 1580 ~ 1582m, this place's well temperature about 55 DEG C.Downhole tool releasing device overall length 10m, righting cylinder specification 95mm × 3mm, conical limit cylinder top external diameter 95mm, lower outer diameter 110mm.
First according to Service Environment such as well temperature, process and train eligible patching tube, specification 106mm × 3mm before patching tube self-expanding, after expanding, under free state, external diameter can be changed into 125mm, length 8 meters.In order to fashionable under preventing patching tube, there is the accidents such as expansions suddenly because of well temperature anomaly, during training, self-expanding thixotroping temperature is set as 80 DEG C, break position temperature in wellbore 55 DEG C far above cover.
First be coated in by heatproof adhesive on leak stopping rubber tube 3 outer wall, then penetrated by patching tube in cable 6 and righting cylinder 12, rear end is against in the middle part of conical limit cylinder 13.Drive cable 6 by patching tube and controllable type downhole tool releasing device down to casing damage position by well maintenance vehicle, opening temp. control instrument, by down-hole heating and temperature control to 90 DEG C, observe pressure gauge 14 and change.When memorial alloy ring 2 reaches trained temperature 80 DEG C, the rapid self-expanding of meeting, causes outside leak stopping rubber tube 3 to expand, subsidizes on the inwall of damaged sleeve pipe.Now, damage sleeve pipe and leak stopping rubber tube 3 can bond closely rapidly by heatproof adhesive, ensure that sealing and plugging is reliable, strengthen repairing effect.After patching tube self-expanding, internal diameter becomes 115.36mm, and be greater than conical limit cylinder 13 lower end maximum outside diameter 110mm, now the gravity of patching tube will be transferred on sleeve pipe.Finally with well maintenance vehicle, cable 1 and controllable type downhole tool releasing device at the uniform velocity ground are proposed.
Resistant to elevated temperatures adhesive market sold by heatproof adhesive in the above-described embodiments, is a kind of adhesive the most frequently used at present, here do not further describing.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
Claims (6)
1. a DH controllable self-expanding casing patching pipe, is characterized in that: comprise patching tube body and controllable type downhole tool releasing device;
Described patching tube body is made up of rubber liner (1), memorial alloy ring (2), leak stopping rubber tube (3), the inner surface of described leak stopping rubber tube (3) and the external surface of rubber liner (1) are by heatproof adhesives, and the external surface of leak stopping rubber tube (3) is also coated with heatproof adhesive; Described memorial alloy ring (2) is positioned between leak stopping rubber tube (3) and rubber liner (1);
Described controllable type downhole tool releasing device at least comprises a temperature controller (5), cable (6), heat pipe (7), heating coiling (8), stainless steel protection pipe (10), thermocouple (11), righting cylinder (12), conical limit cylinder (13); Described conical limit cylinder (13) is connected to the below of righting cylinder (12), described stainless steel protection pipe (10) is positioned at the inside of righting cylinder (12), described heat pipe (7) is positioned at the inside of stainless steel protection pipe (10), described heating coiling (8) uniform winding is in the outside of heat pipe (7), be filled with dielectric (9) between heat pipe (7) and stainless steel protection pipe (10), described thermocouple (11) is fixed on the inwall of righting cylinder (12); Described thermocouple (11) and heating coiling (8) are electrically connected by cable (6) with temperature controller (5) respectively;
Described patching tube body is set in righting cylinder (12) outward, and is stuck in the top of conical limit cylinder (13).
2. a kind of DH controllable self-expanding casing patching pipe according to claim 2, is characterized in that: described leak stopping rubber tube (3) inwall is evenly distributed with trapezoidal groove (4), and described memorial alloy ring (2) embeds in trapezoidal groove (4).
3. a kind of DH controllable self-expanding casing patching pipe according to claim 1, is characterized in that: described memorial alloy ring (2) is obtained by a kind of material in Ti-Ni alloy, iron-nickel alloy, chrome-nickel.
4. a kind of DH controllable self-expanding casing patching pipe according to claim 1, it is characterized in that: described righting cylinder (12) and conical limit cylinder (13) are made up of stainless steel material, and righting cylinder (12) and conical limit cylinder (13) are fixedly connected by welding.
5. a kind of DH controllable self-expanding casing patching pipe according to claim 1, is characterized in that: described controllable type downhole tool releasing device also comprises one for detecting borehole pressure pressure gauge (14).
6. DH controllable self-expanding casing patching pipe according to claim 1, is characterized in that: the expansion temperature of described patching tube body is 80 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106639946A (en) * | 2016-12-27 | 2017-05-10 | 神华集团有限责任公司 | Mine sleeve repairing method |
| CN106863823A (en) * | 2017-02-20 | 2017-06-20 | 江苏博之旺自动化设备有限公司 | A kind of automatic tube-penetrating device, device and method |
| CN108240191A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Leakage subsidizes system and subsidizes method |
| CN108661585A (en) * | 2018-05-16 | 2018-10-16 | 中国石油天然气集团公司管材研究所 | A kind of expansion pipe sleeve damage subsidy restorative procedure based on memorial alloy |
| CN109707333A (en) * | 2018-11-15 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding subsidy method |
| CN109763488A (en) * | 2019-01-29 | 2019-05-17 | 南京金长江交通设施有限公司 | A kind of guard rail breakdown van pile pulling device |
| CN111140196A (en) * | 2018-03-12 | 2020-05-12 | 刘屹凡 | Petroleum pipe repairing method |
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| CN112443287A (en) * | 2020-11-20 | 2021-03-05 | 中国石油天然气股份有限公司 | Low-pressure casing damage well casing patching mechanism and patching method |
| CN113137201A (en) * | 2021-04-29 | 2021-07-20 | 扬州工业职业技术学院 | Chemical method repairing device and method for petroleum casing pipe |
| CN114935063A (en) * | 2022-06-02 | 2022-08-23 | 太仓阿尔法数字科技有限公司 | Method and device for repairing memory alloy of pipeline |
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| CN108240191A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Leakage subsidizes system and subsidizes method |
| CN106639946B (en) * | 2016-12-27 | 2019-05-03 | 神华集团有限责任公司 | Mining casing salvaging method |
| CN106639946A (en) * | 2016-12-27 | 2017-05-10 | 神华集团有限责任公司 | Mine sleeve repairing method |
| CN106863823B (en) * | 2017-02-20 | 2022-09-02 | 江苏博之旺自动化设备有限公司 | Automatic pipe penetrating device, equipment and method |
| CN106863823A (en) * | 2017-02-20 | 2017-06-20 | 江苏博之旺自动化设备有限公司 | A kind of automatic tube-penetrating device, device and method |
| CN111140196A (en) * | 2018-03-12 | 2020-05-12 | 刘屹凡 | Petroleum pipe repairing method |
| CN108661585A (en) * | 2018-05-16 | 2018-10-16 | 中国石油天然气集团公司管材研究所 | A kind of expansion pipe sleeve damage subsidy restorative procedure based on memorial alloy |
| CN109707333A (en) * | 2018-11-15 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of oil well casing self-expanding subsidy method |
| CN109763488A (en) * | 2019-01-29 | 2019-05-17 | 南京金长江交通设施有限公司 | A kind of guard rail breakdown van pile pulling device |
| CN111236880A (en) * | 2020-03-16 | 2020-06-05 | 北京中科金腾科技有限公司 | Method for compensating diameter of circular ring by corrugation, bridge plug and plugging device |
| CN112443287A (en) * | 2020-11-20 | 2021-03-05 | 中国石油天然气股份有限公司 | Low-pressure casing damage well casing patching mechanism and patching method |
| CN112443287B (en) * | 2020-11-20 | 2022-06-03 | 中国石油天然气股份有限公司 | Low-pressure casing damage well casing patching mechanism and patching method |
| CN112228003A (en) * | 2020-11-23 | 2021-01-15 | 中国石油大学(华东) | Shaft gravel filling grouting plugging device for drilling vicious leakage |
| CN113137201A (en) * | 2021-04-29 | 2021-07-20 | 扬州工业职业技术学院 | Chemical method repairing device and method for petroleum casing pipe |
| CN113137201B (en) * | 2021-04-29 | 2023-01-24 | 扬州工业职业技术学院 | Chemical method repairing device and method for petroleum casing pipe |
| WO2023142117A1 (en) * | 2022-01-30 | 2023-08-03 | 杭州电子科技大学技术转移有限公司 | Reel with variable diameter |
| CN114935063A (en) * | 2022-06-02 | 2022-08-23 | 太仓阿尔法数字科技有限公司 | Method and device for repairing memory alloy of pipeline |
| CN114935063B (en) * | 2022-06-02 | 2023-11-21 | 太仓阿尔法数字科技有限公司 | Pipeline memory alloy repairing method and device |
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