CN114183077A - Downhole hydraulic vibration-assisted casing running and well cementation integrated combined tool and use method thereof - Google Patents
Downhole hydraulic vibration-assisted casing running and well cementation integrated combined tool and use method thereof Download PDFInfo
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- CN114183077A CN114183077A CN202111454066.4A CN202111454066A CN114183077A CN 114183077 A CN114183077 A CN 114183077A CN 202111454066 A CN202111454066 A CN 202111454066A CN 114183077 A CN114183077 A CN 114183077A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 51
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 8
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 230000008602 contraction Effects 0.000 abstract description 5
- 239000007921 spray Substances 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 230000036571 hydration Effects 0.000 abstract description 3
- 238000006703 hydration reaction Methods 0.000 abstract description 3
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000011440 grout Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000005465 channeling Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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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
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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
- 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
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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
- 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 integrated combination tool for assisting casing running and well cementation by underground hydraulic vibration and a using method thereof. The integrated combination tool leads fluid to enter the hydraulic self-excitation cavity to generate regular vibration by establishing circulation, so that the sleeve generates axial and radial vibration, and the resistance is reduced and the blockage is eliminated; due to the action of hydraulic pressure difference, the turbine assembly is pushed to drive the guide head to continuously rotate, and under the cutting action of the alloy teeth, reaming can be performed, the well wall can be corrected, and the sleeve can be assisted to smoothly go in; in the well cementation process, because the outer wall of the tool is designed to be a rotational flow type structure, the plane flow of the cement slurry can be changed into rotational flow in the upward return process of the cement slurry, so that the replacement efficiency and the flushing efficiency of the cement slurry are improved; the circulating cement slurry flows through the contraction spray cavity and the nozzle of the self-excited cavity, so that the cement slurry can generate long-distance high-frequency vibration, the rheological property of the cement slurry is improved, the hydration of the cement slurry is more uniform and the solidification of the cement slurry is more compact, and the well cementation quality is further improved.
Description
Technical Field
The invention relates to an integrated combination tool for assisting casing running and well cementation by underground hydraulic vibration and a using method thereof, belonging 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, whether the casing can be put in place or not and whether the well cementation quality is guaranteed or not directly influence the well construction period and the operation safety. At present, a conventional casing auxiliary running tool and a well cementing tool are mutually independent and cannot meet the requirements of complex well cementing operation, 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 conventional auxiliary tool for the casing can not be actively unlocked when the casing is blocked; the conventional well cementation pipe column only can meet the displacement function and cannot play a role in actively improving the well cementation quality. Meanwhile, the existing vibration well cementation technology still has the problems of weak vibration strength and uneven vibration distribution, and the problem of poor vibration amplitude is solved by optimizing a vibration generation mode. Simultaneously, two operation processes of auxiliary 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 pipe descending stage, the smooth descending of the casing pipe is ensured; in the well cementation cement slurry displacement process, a cement slurry rheological model and fluid performance are improved, a cementing surface mud cake is removed, the turbulent flow displacement effect is enhanced, annular gas channeling is inhibited, the cementing strength of a cement surface is improved, and the well cementation quality is effectively improved.
Disclosure of Invention
The invention aims to provide an integrated combination tool for assisting casing running and well cementation by underground hydraulic vibration, which can reduce the failure risk of the casing running and the well cementation in the underground with a complex structure, improve the casing running success rate, ensure the high quality rate of the well cementation and ensure the operation safety.
The invention provides a hydraulic vibration auxiliary casing running and well cementation integrated combined tool which comprises a guide shoe jet flow module, a reaming drainage module and a hydraulic vibration module;
the hydraulic vibration module is arranged in the sleeve, and when fluid flows through the hydraulic vibration module, the hydraulic vibration module generates axial vibration and radial vibration;
the reaming drainage module is vertically connected with the guide shoe jet flow module, and a guide head serving as the integrated combined tool is arranged at the lower part of the hydraulic vibration module; the guide head is axially rotatable.
In the integrated combined tool, the hydraulic vibration module is of a self-excitation rotational flow cavity structure, regular vibration is generated due to the entrainment effect in the process that fluid flows through the self-excitation rotational flow cavity, and if the sleeve encounters resistance and blockage in the sleeve running process, the sleeve is vibrated through connection circulation, the blockage and the blockage are removed, and the sleeve running capacity is improved; meanwhile, due to regular vibration, the broken mud cake attached to the casing string can be removed, the performance of cement paste is improved, the cementing strength of a cement sheath interface is enhanced, and the well cementation quality is improved.
In the integrated combined tool, the outer part of the guide shoe jet flow module is of a spiral-flow type structure.
In the integrated combination tool, the guide shoe jet flow module is provided with an eccentric angle outside, and can guide the casing to run in when rotating, so that the stress imbalance when the casing is blocked is reduced, and the casing string is guided to advance along the drilled hole at the optimum angle;
4 jet holes of 30 degrees are arranged in the guide shoe jet module, and cement slurry sprayed at high speed impacts the well wall from the jet holes in the well cementation process, so that mud cakes can be removed, and the bonding strength of the two interfaces is improved.
Among the foretell integrated combination tool, reaming drainage module is the spiral-flow type structure, can return the in-process on the grout, becomes the whirl with the grout plane flow and flows, improves grout replacement efficiency and washing efficiency.
In the integrated combined tool, the reaming drainage module is designed in a concave-convex mode, wherein the groove parts are provided with the spiral rotational flow channels, and the diamond alloy teeth are embedded in the protruding parts and can play a role in reaming and reducing friction force in the process of running the casing string.
In the integrated combined tool, a turbine assembly is arranged in the sleeve and drives the guide shoe jet module and the reaming drainage module to rotate.
The invention discloses a downhole hydraulic vibration assisted casing running and well cementing integrated combined tool, which is arranged at the lower end of a casing and runs into a well bottom along with the casing, and in the casing running and well cementing processes, fluid circulation is opened, so that continuous and regular strong hydraulic vibration is generated, and the combined tool acts on a casing string, a well wall and cement paste of the whole well section to play a role in assisting casing running and well cementing.
The hydraulic vibration-assisted casing running and well cementing integrated combination tool provided by the invention can improve and enhance the success rate of operation without changing the existing casing running and well cementing process, and can meet the actual requirements of complex underground casings and well cementing.
When the hydraulic vibration-assisted casing setting and well cementation integrated combined tool is used, the hydraulic vibration-assisted casing setting and well cementation integrated combined tool can be carried out according to the following steps:
s1, mounting the integrated combination tool at the tail end of the casing, and running the integrated combination tool into a preset position in an oil and gas well along with the casing string;
s2, in the process that the casing is blocked, a circulating joint is connected at the wellhead, drilling fluid is injected into the casing, and the integrated combined tool is used for unblocking the blockage;
s3, after the sleeve is unblocked and stuck, the circulating joint is detached, 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 combined tool is transmitted to the surrounding casing string, well wall and cement slurry;
and S5, in the cement slurry return process, changing the displacement flow state of the well cementation cement slurry under the action of the reaming drainage module to finish the final well cementation operation.
In the above step S2, 1.0m is used3/min～1.5m3Injecting drilling fluid at a speed of/min to guide the device to normally operate; gradually increasing the circulation discharge to 2.5-3.0 m3Min, achieving the set discharge parameter of the self-excitation vortex cavity; and continuously circulating for 1-2 weeks according to the set displacement parameters to ensure the blockage and blockage removal.
The hydraulic vibration auxiliary casing running and well cementation integrated combined tool is drilled to the bottom of the artificial well, and internal components of the hydraulic vibration auxiliary casing running and well cementation integrated combined tool are drilled, so that the next operation is not influenced.
The hydraulic vibration module adopted by the integrated combination tool is designed as an independent self-excitation rotational flow cavity, and the generated vibration strength and range are determined by the flow rate and rheological property of cement paste, the cross-sectional area of a contraction spray cavity and a nozzle of the contraction spray cavity, and the like.
The main inner main parts of the integrated combined tool have good drillability, and the integrated combined tool is made of materials with high required strength, good elasticity, high fatigue resistance and strong corrosion resistance.
The hydraulic vibration auxiliary casing running and well cementing integrated combined tool is mainly used for auxiliary casing running and well cementing operation of wells with complex structures, vibration waves with certain strength can be generated in the whole well section through special internal and external structures, vibration effect processing is carried out on casing pipe blockage relieving, and generated vibration effects can effectively remove casing wall virtual mud cakes and improve cementing quality of cement slurry and casing pipes.
Meanwhile, the external part of the integrated combination tool is designed into a spiral flow channel, so that the flow process of cement paste can be changed, the displacement efficiency is improved, and due to the existence of hydraulic vibration, the vibration effect processing is carried out on the performance of the cement paste, the hydration process of the cement paste is accelerated, the rheological property of the cement paste is changed, the initial setting and the strength development of the cement paste in an annular space are influenced, and the well cementation quality is guaranteed.
The invention has reasonable design structure, simple and convenient use method, lower processing cost, large vibration amplitude, long vibration range and high vibration frequency, does not need to change the prior casing running and well cementing process, and can obviously improve the casing running success rate and the well cementing quality.
Drawings
FIG. 1 is a schematic structural view of the downhole hydraulic vibration-assisted casing and well cementing integrated combination 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.
FIG. 3 is a schematic structural diagram of a reaming drainage module in the downhole hydraulic vibration-assisted casing setting and well cementation integrated combined tool.
FIG. 4 is a schematic structural diagram of a guide shoe jet module in the downhole hydraulic vibration-assisted casing running and well cementation integrated combination tool.
FIG. 5 is a schematic structural diagram of a turbine assembly in the downhole hydraulic vibration-assisted casing and well cementation integrated combination 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 embodiments.
As shown in fig. 1, the structural schematic diagram of the downhole hydraulic vibration assisted casing running and well cementing integrated combination tool provided by the invention comprises a guide shoe jet flow module 1 capable of guiding the casing to run in, a reaming drainage module capable of changing a fluid flow channel and playing a reaming role, a turbine assembly 4 which is arranged in the casing and drives the guide shoe jet flow module 1 and the reaming drainage module to rotate together through hydraulic circulation, a hydraulic vibration module 5 with a unique self-excitation rotational flow cavity structure, and an internal thread joint 6 capable of being matched with the casing.
In the downhole hydraulic vibration assisted casing running and well cementation integrated combined tool, a hydraulic vibration module 5 is arranged in a casing, as shown in figure 2, the hydraulic vibration module is of a self-excitation rotational flow cavity structure, and generates regular vibration due to entrainment in the process of flowing fluid through the self-excitation rotational flow cavity; meanwhile, due to regular vibration, the broken mud cake attached to the casing string can be removed, the performance of cement paste is improved, the cementing strength of a cement sheath interface is enhanced, and the well cementation quality is improved.
In the integrated combination tool for assisting casing running and well cementation by underground hydraulic vibration, the reaming and drainage module is of a rotational flow type structure, so that the planar flow of cement slurry can be changed into rotational flow in the upward return process of the cement slurry, and the replacement efficiency and the flushing efficiency of the cement slurry are improved. Specifically, as shown in fig. 3, reaming drainage module is concave-convex type design, wherein, the concave part is many spiral whirl passageways 2, and diamond alloy tooth 3 is inlayed to the convex part, can play reaming reduction friction effect in the casing cluster process of running into.
In the downhole hydraulic vibration assisted casing running and well cementation integrated combined tool, as shown in fig. 4, the guide shoe jet flow module 1 is of a rotational flow type structure, and an eccentric angle is arranged outside the guide shoe jet flow module, so that the guide shoe jet flow module can guide a casing to run in when rotating, the stress imbalance when the casing is blocked is reduced, and the casing string is guided to advance along a drilled hole at an optimal angle. 4 jet holes of 30 degrees are arranged in the guide shoe jet module 1, and during the well cementation process, cement slurry sprayed out at high speed impacts the well wall from the jet holes, so that mud cakes can be removed, and the bonding strength of the two interfaces is improved.
In the downhole hydraulic vibration-assisted casing running and well cementation integrated combined tool, a turbine assembly 4 is arranged in the casing, the turbine assembly 4 drives the guide shoe jet flow module 1 and the reaming drainage module to rotate, and the structure of the turbine assembly 5 is shown in figure 5.
The integrated combination tool of the invention can realize the principles of casing running and well cementation as follows:
the fluid is led to enter the hydraulic self-excitation cavity to generate regular vibration by establishing circulation, so that the sleeve generates axial and radial vibration, and the resistance is reduced and the blockage is eliminated; 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, reaming can be performed, the well wall can be corrected, and the sleeve can be assisted to smoothly go into the well; in the well cementation process, because the outer wall of the tool is designed to be a rotational flow type structure, the plane flow of the cement slurry can be changed into rotational flow in the upward return process of the cement slurry, so that the replacement efficiency and the flushing efficiency of the cement slurry are improved; circulating cement slurry flows through a contraction spray cavity and a nozzle of a self-excitation cavity (a hydraulic vibration module 5), so that the cement slurry can generate long-distance high-frequency vibration, the rheological property of the cement slurry is improved, the cement slurry is hydrated more uniformly and solidified more compactly, and the well cementation quality is improved.
When the underground hydraulic vibration auxiliary casing running and well cementation integrated combined tool is used, the method can be carried out according to the following steps:
6, circulating a pump before well cementation to prepare well cementation cement injection;
step 7, the integrated combination tool generates hydraulic vibration under the condition that the circulation of the drilling-through meets the requirement of the well cementation displacement; the vibration wave will be transmitted to the surrounding casing string, well wall and cement slurry;
and 8, in the cement slurry upward returning process, changing the displacement flow state of the well cementation cement slurry by the spiral flow channel outside the integrated tool to finish the final well cementation operation.
And 9, drilling down to the bottom of the artificial well, and drilling out internal components of the hydraulic vibration assisted casing running and well cementation integrated combined tool without influencing the next operation.
The number of Palman generators arranged on each sealing isolation plate and the cross-sectional areas of the contraction spray cavity and the nozzle of each sealing isolation plate 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 and inner parts of the integrated combined tool have good drillability, and the material of the integrated combined tool has high required strength, good elasticity, high fatigue resistance and strong corrosion resistance.
When the integrated combination tool is used, the downhole hydraulic vibration is used for assisting the casing running and well cementation integrated combination tool to generate a certain vibration effect, the resistance is reduced, the blockage is eliminated, and the casing running is assisted; meanwhile, due to the design of the spiral flow channel, the flowing state of cement paste can be changed, the displacement efficiency is improved, and due to the existence of hydraulic vibration, the vibration effect processing is carried out on the performance of the cement paste, the hydration process of the cement paste is accelerated, the rheological property of the cement paste is changed, the initial setting and final setting of the cement paste in an annular space are influenced, and the well cementation quality is guaranteed; the invention has reasonable design structure, simple and convenient use method, lower processing cost, large vibration amplitude, long vibration range and high vibration frequency, does not need to change the prior casing running and well cementing process, and can obviously improve the casing running success rate and the well cementing quality.
The foregoing is illustrative of embodiments of the present invention and is not to be construed as limiting thereof, and it is to be understood that modifications and equivalents may be made to the specific embodiments described without departing from the spirit and scope of the present invention.
Claims (8)
1. A hydraulic vibration assisted casing running and well cementation integrated combined tool comprises a guide shoe jet flow module, a reaming drainage module and a hydraulic vibration module;
the hydraulic vibration module is arranged in the sleeve, and when fluid flows through the hydraulic vibration module, the hydraulic vibration module generates axial vibration and radial vibration;
the reaming drainage module is vertically connected with the guide shoe jet flow module, and a guide head serving as the integrated combined tool is arranged at the lower part of the hydraulic vibration module; the guide head is axially rotatable.
2. The integrated cluster tool of claim 1, wherein: the hydraulic vibration module is of a self-excitation rotational flow cavity structure.
3. The integrated cluster tool of claim 1 or 2, wherein: the outside of the guide shoe jet flow module is of a spiral-flow type structure.
4. The integrated cluster tool of claim 3, wherein: an eccentric angle is arranged outside the guide shoe jet flow module;
4 jet holes of 30 degrees are arranged in the guide shoe jet module.
5. The integrated cluster tool of any of claims 1-4, wherein: the reaming drainage module is of a rotational flow type structure.
6. The integrated cluster tool of claim 6, wherein: the reaming drainage module is designed in a concave-convex mode, wherein the groove portion is divided into a plurality of spiral rotational flow channels, and diamond alloy teeth are embedded in the protruding portion.
7. The integrated cluster tool of any of claims 1-6, wherein: the turbine assembly is arranged in the sleeve and drives the guide shoe jet module and the reaming drainage module to rotate.
8. Use of the integrated kit of any of claims 1-7, comprising the steps of:
s1, mounting the integrated combination tool at the tail end of the casing, and running the integrated combination tool into a preset position in an oil and gas well along with the casing string;
s2, in the process that the casing is blocked, a circulating joint is connected at the wellhead, drilling fluid is injected into the casing, and the integrated combined tool is used for unblocking the blockage;
s3, after the sleeve is unblocked and stuck, the circulating joint is detached, 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 combined tool is transmitted to the surrounding casing string, well wall and cement slurry;
and S5, in the cement slurry return process, changing the displacement flow state of the well cementation cement slurry under the action of the reaming drainage module to finish the final well cementation operation.
Priority Applications (1)
| 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN114183077A true CN114183077A (en) | 2022-03-15 |
| CN114183077B 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 |
| CN116146133A (en) * | 2023-04-19 | 2023-05-23 | 西南石油大学 | High-frequency resonance type cement sheath crushing tool for assisting sleeve recovery |
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| CN111594096A (en) * | 2020-05-22 | 2020-08-28 | 中国农业大学 | Underground ultrasonic vibration well cementation system and vibration well cementation method thereof |
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| CN116146133A (en) * | 2023-04-19 | 2023-05-23 | 西南石油大学 | High-frequency resonance type cement sheath crushing tool for assisting sleeve recovery |
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| CN114183077B (en) | 2023-12-05 |
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