CN114183077B - Underground hydraulic vibration assisted casing running and well cementation integrated combined tool and use method thereof - Google Patents
Underground hydraulic vibration assisted casing running and well cementation integrated combined tool and use method thereof Download PDFInfo
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- CN114183077B CN114183077B CN202111454066.4A CN202111454066A CN114183077B CN 114183077 B CN114183077 B CN 114183077B CN 202111454066 A CN202111454066 A CN 202111454066A CN 114183077 B CN114183077 B CN 114183077B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000004568 cement Substances 0.000 claims abstract description 53
- 230000008569 process Effects 0.000 claims abstract description 29
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 abstract description 6
- 238000011010 flushing procedure Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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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
- E21B28/00—Vibration generating arrangements for boreholes or wells, e.g. for stimulating production
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/005—Fishing for or freeing objects in boreholes or wells using vibrating or oscillating means
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The invention discloses an underground hydraulic vibration assisted casing and well cementation integrated combination tool and a use method thereof. According to the integrated combination tool, the circulating guide fluid is established to enter the hydraulic self-excited cavity to generate regular vibration, so that the sleeve tube generates axial and radial vibration, and the resistance is reduced; due to the action of hydraulic pressure difference, the turbine assembly is pushed to drive the guide head to continuously rotate, and the reaming and reaming can be carried out by means of the cutting action of the alloy teeth, so that the well wall can be corrected, and the smooth descending of the sleeve is assisted; in the well cementation process, as the outer wall of the tool is of a rotational flow type structural design, the planar flow of cement paste can be changed into rotational flow in the cement paste upward return process, and the cement paste displacement efficiency and the flushing efficiency are improved; the circulating cement paste flows through the shrinkage spray cavity and the spray nozzle of the self-excited cavity, so that long-distance high-frequency vibration can be generated, the rheological property of the cement paste is improved, the cement paste is hydrated more uniformly and solidified more densely, and the well cementation quality is further improved.
Description
Technical Field
The invention relates to an underground hydraulic vibration assisted casing running and well cementation integrated combined tool and a use method thereof, and belongs to the field of oil and gas well engineering.
Background
Casing running and well cementation are one of the most critical parts in drilling engineering, and whether casing running is in place or not and whether well cementation quality is guaranteed directly influences well construction period and operation safety. At present, the conventional casing auxiliary running tool and the conventional well cementing tool are mutually independent and cannot meet the well cementing operation requirement of a complex well, and in order to overcome the defects, the reliability and the effectiveness of the well cementing tool are improved by adopting an integrated design. The existing sleeve auxiliary tool can not actively unclamp when the sleeve encounters a blockage; however, the conventional well cementation pipe column can only meet the displacement function and cannot actively improve the well cementation quality. Meanwhile, the existing vibration well cementation technology still has the problems of weak vibration intensity and uneven vibration distribution, and the problem of poor vibration amplitude is solved by optimizing the vibration generation mode. Simultaneously, two operation processes of casing running and well cementation are considered, and a hydraulic vibration auxiliary casing running and well cementation integrated combination tool is designed to solve the problem that two links of casing running and well cementation are separated; in the casing running stage, the casing is ensured to be smoothly run in; in the process of displacing the well cementation cement paste, the rheological model and the fluid performance of the cement paste are improved, the cement paste cake of the well cementation face is removed, the turbulent flow paste displacement effect is enhanced, the ring air channeling is inhibited, the cement paste strength of the well cementation face is improved, and the well cementation quality is effectively improved.
Disclosure of Invention
The invention aims to provide an underground hydraulic vibration assisted casing and well cementation integrated tool, which can reduce risks of casing and well cementation failure under a complex structure, improve the casing running success rate, ensure the well cementation high-quality rate and ensure the operation safety.
The invention provides a hydraulic vibration assisted casing and well cementation integrated combination tool, which comprises a guide shoe jet module, a reaming drainage module and a hydraulic vibration module;
the hydraulic vibration module is arranged in the sleeve, and generates axial vibration and radial vibration when fluid flows through the hydraulic vibration module;
the reaming and drainage module is connected with the guide shoe jet module up and down, and a guide head serving as the integrated combination tool is arranged at the lower part of the hydraulic vibration module; the guide head is rotatable in an axial direction.
In the integrated combined tool, the hydraulic vibration module is of a self-excited cyclone cavity structure, regular vibration is generated due to entrainment in the process of fluid flowing through the self-excited cyclone cavity, and if the sleeve is blocked and blocked in the process of casing running, the sleeve is vibrated by switching on circulation, so that the blocking and blocking are released, and the casing running capacity is improved; meanwhile, due to regular vibration, the broken mud cake attached to the casing string can be removed, the cement paste performance is improved, the cementing strength of a cement sheath interface is enhanced, and the well cementation quality is improved.
In the integrated combination tool, the outer part of the guide shoe jet module is in a cyclone type structure.
In the integrated combination tool, the eccentric angle is arranged outside the guide shoe jet module, so that the sleeve can be guided to be put down when the guide shoe jet module rotates, unbalance of stress when the sleeve is blocked is reduced, and the casing string is guided to advance along the real drilling hole at an optimal angle;
4 jet holes of 30 degrees are arranged in the guide shoe jet module, cement slurry sprayed at high speed impacts the well wall from the jet holes in the well cementation process, mud cakes can be removed, and the cementing strength of the two interfaces is improved.
In the integrated combination tool, the reaming and drainage module is of a cyclone structure, so that cement paste planar flow can be changed into cyclone flow in the cement paste upward return process, and cement paste displacement efficiency and flushing efficiency are improved.
In the integrated combination tool, the reaming and drainage module is of a concave-convex design, wherein the groove part is a plurality of spiral swirl channels, and the convex part is inlaid with diamond alloy teeth, so that the function of reaming and reducing friction force can be achieved in the process of casing string insertion.
In the integrated combination tool, a turbine assembly is arranged in the sleeve, and the turbine assembly drives the shoe guide jet module and the reaming drainage module to rotate.
The underground hydraulic vibration assisted casing running and well cementation integrated combined tool is arranged at the lower end of the casing, and is run into the bottom of the well along with the casing, and fluid circulation is conducted in the casing running and well cementation processes, so that continuous and regular strong hydraulic vibration is generated, and the integrated combined tool acts on casing strings, well walls and cement paste of the whole well section to play a role in assisting casing running and well cementation.
The hydraulic vibration assisted casing running and well cementation integrated combined tool does not change the existing casing running and well cementation process, can improve and increase the operation success rate, and can meet the actual requirements of complex underground casing running and well cementation.
When the hydraulic vibration assisted casing and well cementation integrated combined tool is used, the hydraulic vibration assisted casing and well cementation integrated tool can be used according to the following steps:
s1, installing the integrated combination tool at the tail end of a casing, and descending the integrated combination tool into a preset position in an oil and gas well along with a casing string;
s2, in the process that the sleeve is blocked, a circulation joint is connected to a wellhead, drilling fluid is injected into the sleeve, and blocking are removed by using the integrated combination tool;
s3, after the sleeve is unblocked and blocked, the circulating joint is removed, and the sleeve is continuously lowered to a preset position;
s4, performing well cementation operation, wherein the vibration effect generated by the hydraulic vibration of the integrated combination tool is transmitted to surrounding casing strings, well walls and cement paste;
s5, changing the displacement flow state of the well cementation cement slurry under the action of the reaming and drainage module in the cement slurry upward returning process, and finishing the final well cementation operation.
In the step S2, 1.0m is adopted 3 /min～1.5m 3 Injecting drilling fluid at a speed of/min to guide the device to normally operate; gradually increasing the circulation displacement to 2.5-3.0 m 3 A/min, achieving the set displacement parameter of the self-excited cyclone cavity; and continuously cycling for 1-2 weeks according to the set displacement parameters to ensure the unblocking and unblocking of the card.
The drilling tool is used for drilling down to the bottom of an artificial well, and the internal components of the hydraulic vibration auxiliary casing running and well cementation integrated combined tool are drilled down, so that the next operation is not influenced.
The hydraulic vibration module adopted by the integrated combination tool is designed for an independent self-excited rotational flow cavity, and the generated vibration intensity and range are determined by the flow velocity and rheological property of cement paste, the size of the cross section area of a shrinkage spray cavity and a nozzle of the cement paste, and the like.
Main parts in the integrated combined tool main part all have good drillability, and the material of the integrated combined tool main part is high in required strength, good in elasticity, high in fatigue resistance and strong in corrosion resistance.
The hydraulic vibration assisted casing running and well cementation integrated combined tool is mainly used for the complex structure well assisted casing running and well cementation operation, can generate vibration waves with certain intensity in the whole well section through a special inner and outer structure, performs vibration effect treatment on the casing when encountering resistance and releasing the clamp, and can effectively remove the broken mud cake on the casing wall and improve the cementing quality of cement paste and casing string.
Meanwhile, as the external part of the integrated combined tool is designed into a spiral runner, the cement paste flowing process can be changed, the displacement efficiency is improved, the cement paste performance is subjected to vibration effect treatment due to the existence of hydraulic vibration, the hydration process of the cement paste is accelerated, the rheological property of the cement paste is changed, the initial final setting and the strength development of the cement paste in an annular space are influenced, and the well cementation quality is ensured.
The invention has reasonable design structure, simple and convenient use method and lower processing cost, does not need to change the existing casing running and well cementation process, has large vibration amplitude, long vibration range and high vibration frequency, and can obviously improve the casing running success rate and well cementation quality.
Drawings
FIG. 1 is a schematic diagram of the downhole hydraulic vibration assisted casing and well cementing integrated tool of the present invention.
Fig. 2 is a schematic structural diagram of a hydraulic vibration module in the downhole hydraulic vibration-assisted casing and well cementation integrated combination tool of the invention.
Fig. 3 is a schematic structural diagram of a reaming and drainage module in the downhole hydraulic vibration assisted casing and well cementation integrated combination tool.
Fig. 4 is a schematic structural view of a shoe-guiding jet module in the downhole hydraulic vibration assisted casing and well cementation integrated combination tool of the invention.
FIG. 5 is a schematic view of the turbine assembly in the downhole hydraulic vibration assisted casing and well cementing integrated tool of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to the following examples.
As shown in fig. 1, the structural schematic diagram of the downhole hydraulic vibration assisted casing and well cementation integrated tool provided by the invention comprises a guide jet module 1 capable of guiding the casing to be put in, a reaming and drainage module capable of changing a fluid flow passage and playing a reaming role, a turbine assembly 4 which is arranged in the casing and drives the guide jet module 1 and the reaming and drainage module to rotate together through hydraulic circulation, a hydraulic vibration module 5 with a unique self-excited rotational flow cavity structure, and an internal threaded connector 6 capable of being matched with the casing.
In the underground hydraulic vibration assisted casing and well cementation integrated combined tool, the hydraulic vibration module 5 is arranged in the casing, as shown in fig. 2, and is of a self-excited cyclone cavity structure, regular vibration is generated due to entrainment in the process of fluid flowing through the self-excited cyclone cavity, and if the casing is blocked and blocked in the casing running process, the casing is vibrated by switching on circulation, so that blocking and blocking are released, and the casing running capacity is improved; meanwhile, due to regular vibration, the broken mud cake attached to the casing string can be removed, the cement paste performance is improved, the cementing strength of a cement sheath interface is enhanced, and the well cementation quality is improved.
In the underground hydraulic vibration assisted casing and well cementation integrated combined tool, the reaming and drainage module is of a cyclone structure, so that the planar flow of cement paste can be changed into cyclone flow in the cement paste upward return process, and the cement paste displacement efficiency and the flushing efficiency are improved. Specifically, as shown in fig. 3, the reaming and drainage module is of a concave-convex design, wherein the groove part is a plurality of spiral swirl channels 2, and the convex part is inlaid with diamond alloy teeth 3, so that the reaming and friction force reducing effect can be achieved in the casing string descending process.
In the underground hydraulic vibration assisted casing running and well cementation integrated combined tool, as shown in fig. 4, the outer part of the guide shoe jet module 1 is in a cyclone type structure, the outer part of the guide shoe jet module is provided with an eccentric angle, the guide shoe jet module can guide the casing to run in when rotating, the unbalance of stress when the casing is blocked is reduced, and the casing string is guided to advance along a real drilling hole at an optimum angle. 4 jet holes of 30 degrees are arranged in the guide shoe jet module 1, cement slurry sprayed at high speed impacts the well wall from the jet holes in the well cementation process, mud cakes can be removed, and the cementing strength of the two interfaces is improved.
In the underground hydraulic vibration assisted casing and well cementation integrated combined tool, a turbine assembly 4 is arranged in the casing, the turbine assembly 4 drives a shoe guide jet module 1 and a reaming drainage module to rotate, and the structure of a turbine assembly 5 is shown in figure 5.
The invention relates to an integrated combination tool which can realize casing running and well cementation, and the principle is as follows:
the circulating guide fluid is established to enter the hydraulic self-excitation cavity to generate regular vibration, so that the sleeve tube generates axial and radial vibration, and the blockage is reduced; due to the action of hydraulic pressure difference, the turbine assembly 4 is pushed to drive the guide head to continuously rotate, and by means of the cutting action of the diamond alloy teeth 3, the borehole wall can be reamed, the well wall can be corrected, and the auxiliary sleeve can be smoothly put in; in the well cementation process, as the outer wall of the tool is of a rotational flow type structural design, the planar flow of cement paste can be changed into rotational flow in the cement paste upward return process, and the cement paste displacement efficiency and the flushing efficiency are improved; the circulating cement slurry flows through the shrinkage spray cavity and the nozzle of the self-excited cavity (the hydraulic vibration module 5), so that long-distance high-frequency vibration can be generated, the rheological property of the cement slurry is improved, the cement slurry is hydrated more uniformly and coagulated more densely, and the well cementation quality is further improved.
When the downhole hydraulic vibration assisted casing and well cementation integrated combined tool is used, the combined tool can be used for carrying out the following steps:
step 1, installing the integrated combination tool at the tail end of a casing, and descending the integrated combination tool into a preset position in an oil and gas well along with a casing string;
step 2, in the process of blocking the sleeve and clamping the sleeve, connecting a circulation joint at a wellhead, and using a drilling pump according to the starting displacement of 1.0m 3 /min～1.5m 3 Drilling fluid or sea water in/min is communicated, and the guiding device normally operates;
step 3, gradually increasing the circulation displacement to 2.5-3.0 m 3 A/min, achieving the set displacement parameter of the self-excited cyclone cavity;
step 4, continuously circulating for 1-2 weeks according to the set displacement parameters to ensure the blockage and blockage removal;
step 5, after the sleeve is blocked and unblocked, the continuous circulation joint is removed, and the sleeve is continuously put down to a preset position;
step 6, connecting a pump for circulation before cementing, and preparing cementing;
step 7, the integrated combination tool of the invention generates hydraulic vibration when the opening circulation meets the requirement of well cementation displacement; the vibration wave is transmitted to surrounding casing strings, well walls and cement paste;
and 8, in the cement paste upward return process, the cement paste is subjected to an external spiral runner of an integrated tool, so that the displacement flow state of the well cementation cement paste is changed, and the final well cementation operation is completed.
And 9, drilling down to the artificial well bottom, and drilling down the inner component of the hydraulic vibration assisted casing running and well cementation integrated tool, so that the next operation is not influenced.
The number of the Palman generators and the cross-sectional areas of the constriction spray chambers and the nozzles of the Palman generators are arranged on each sealing isolation plate, and the size of the Palman generators and the cross-sectional areas of the constriction spray chambers and the nozzles are determined according to the flow rate and the density of cement slurry in the annular space and the required ultrasonic vibration intensity.
The main inner parts of the integrated combination tool have good drillability, and the material of the integrated combination tool has the advantages of high strength, good elasticity, high fatigue resistance and strong corrosion resistance.
When the integrated combination tool is utilized, the downhole hydraulic vibration is used for assisting in casing running and well cementation, so that a certain vibration effect is generated, resistance is reduced, and the casing is assisted in running; meanwhile, due to the design of the spiral flow channel, the flowing state of the cement paste can be changed, the displacement efficiency is improved, due to the existence of hydraulic vibration, the vibration effect treatment is carried out on the cement paste performance, the hydration process of the cement paste is accelerated, the rheological property of the cement paste is changed, the initial final setting and the strength development of the cement paste in an annular space are influenced, and the well cementation quality is ensured; the invention has reasonable design structure, simple and convenient use method and lower processing cost, does not need to change the existing casing running and well cementation process, has large vibration amplitude, long vibration range and high vibration frequency, and can obviously improve the casing running success rate and the well cementation quality.
The foregoing is provided to illustrate embodiments of the invention and is not to be construed as limiting the invention, and it is intended that any modifications or equivalent arrangements of the embodiments described in the detailed description of the invention be made without departing from the spirit and scope of the invention.
Claims (5)
1. A hydraulic vibration assisted casing and well cementation integrated tool comprises a guide shoe jet module, a reaming drainage module and a hydraulic vibration module;
the hydraulic vibration module is arranged in the sleeve, and generates axial vibration and radial vibration when fluid flows through the hydraulic vibration module;
the reaming and drainage module is connected with the guide shoe jet module up and down, and a guide head serving as the integrated combination tool is arranged at the lower part of the hydraulic vibration module; the guide head can rotate along the axial direction;
the hydraulic vibration module is of a self-excitation cyclone cavity structure;
the reaming and drainage module is in a cyclone structure;
the inside of the sleeve is provided with a turbine assembly, and the turbine assembly drives the shoe guide jet module and the reaming drainage module to rotate.
2. The integrated cluster tool of claim 1, wherein: the outer part of the guide shoe jet module is in a cyclone type structure.
3. The integrated cluster tool of claim 2, wherein: an eccentric angle is arranged outside the guide shoe jet module;
4 jet holes of 30 degrees are arranged in the guide shoe jet module.
4. A unitary combination according to any one of claims 1-3, wherein: the reaming drainage module is of concave-convex design, wherein the groove part is a plurality of spiral rotational flow channels, and the convex part is inlaid with diamond alloy teeth.
5. A method of using the integrated cluster tool of any one of claims 1-4, comprising the steps of:
s1, installing the integrated combination tool at the tail end of a casing, and descending the integrated combination tool into a preset position in an oil and gas well along with a casing string;
s2, in the process that the sleeve is blocked, a circulation joint is connected to a wellhead, drilling fluid is injected into the sleeve, and blocking are removed by using the integrated combination tool;
s3, after the sleeve is unblocked and blocked, the circulating joint is removed, and the sleeve is continuously lowered to a preset position;
s4, performing well cementation operation, wherein the vibration effect generated by the hydraulic vibration of the integrated combination tool is transmitted to surrounding casing strings, well walls and cement paste;
s5, changing the displacement flow state of the well cementation cement slurry under the action of the reaming and drainage module in the cement slurry upward returning process, and finishing the final well cementation operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454066.4A CN114183077B (en) | 2021-12-01 | 2021-12-01 | Underground hydraulic vibration assisted casing running and well cementation integrated combined tool and use method thereof |
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| CN202111454066.4A CN114183077B (en) | 2021-12-01 | 2021-12-01 | Underground hydraulic vibration assisted casing running and well cementation integrated combined tool and use method thereof |
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| CN114183077B true CN114183077B (en) | 2023-12-05 |
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| CN114991694A (en) * | 2022-06-29 | 2022-09-02 | 中海石油(中国)有限公司 | Downhole two-stage hydraulic oscillation casing auxiliary device and method |
| CN116146133B (en) * | 2023-04-19 | 2023-06-23 | 西南石油大学 | High-frequency resonance type cement sheath crushing tool for assisting sleeve recovery |
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