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Electromagnetic flexible short-section drilling tool suitable for geothermal well

A flexible pup joint and drilling tool technology, applied in drilling equipment, directional drilling, drill pipe and other directions, can solve the problems of low build-up, inapplicability, complex structure, etc., and achieve convenient operation, high practicability, and tool structure. simple effect

Pending Publication Date: 2021-10-12
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is that the hot dry rock geothermal well drilling tool is not resistant to high temperature, the build-up degree is not high, the tool is limited by the size of the borehole, lacks flexibility, has a complex structure, and is not suitable for one-trip drilling, etc.

Method used

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  • Electromagnetic flexible short-section drilling tool suitable for geothermal well
  • Electromagnetic flexible short-section drilling tool suitable for geothermal well
  • Electromagnetic flexible short-section drilling tool suitable for geothermal well

Examples

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Embodiment 1

[0028] refer to Figure 1~3 , which is the first embodiment of the present invention, this embodiment provides an electromagnetic flexible nipple drilling tool suitable for geothermal wells, which includes a casing connection assembly 100 and a drilling extrusion assembly 200, and the casing connection assembly 100 is integrally installed In an underground well, the lower part of the housing connection assembly 100 is connected to the drill bit, and a hydraulic pump is installed on the ground to provide power. The hydraulic pump is fixedly installed at the wellhead for transporting drilling fluid to the inside of the drill pipe. The hollow drill pipe is installed at the output end of the hydraulic pump, the upper part is connected with the power system on the well, and the lower part is connected with the housing connection assembly 100 .

[0029] The casing connection assembly 100 includes an upper nipple shell 101, a lower nipple shell 102 and a connector 103, the connector ...

Embodiment 2

[0037] refer to Figure 3-5 , is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The extrusion part 205 includes a fixed block 205a, a movable block 205b and a first elastic part 205c, which can assist the upper piston block 201, the lower piston block 202 and the The piston cylinder 203 resets.

[0038] The fixed block 205a is installed at the bottom of the second piston cavity 102a, and is fixedly connected by bolts penetrating through the outer wall of the lower nipple casing 102. The first elastic member 205c is installed on the top of the fixed block 205a, and the movable block 205b is also located at the second top of the fixed block 205a. In the second piston cavity 102a, one end of the first elastic member 205c is fixedly connected to the top of the fixed block 205a, and the other end is fixedly connected to the bottom of the movable block 205b. When driving the lower nipple housing 102 down, the lower piston block 2...

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Abstract

The invention discloses an electromagnetic flexible short-section drilling tool suitable for a geothermal well. The electromagnetic flexible short-section drilling tool comprises a shell connecting assembly and a well drilling extrusion assembly, wherein the shell connecting assembly comprises an upper short-section shell, a lower short-section shell and a connector, the connector is located between the upper short-section shell and the lower short-section shell, one end of the connector is connected with the upper short-section shell, the other end of the connector is connected with the lower short-section shell, two end surfaces between the upper short-section shell and the lower short-section shell are matched with each other, the well drilling extrusion assembly comprises an upper piston block, a lower piston block and a piston cylinder, one end of the piston cylinder is fixedly connected with the upper piston block, the other end of the piston cylinder is fixedly connected with the lower piston block, the upper piston block is movably located in the upper short-section shell, and the lower piston block is movably located in the lower short-section shell. According to the electromagnetic flexible short-section drilling tool, a ground drilling fluid applies pressure to a piston, the piston works downwards, the ground is powered on, electromagnetic devices attract each other and are closed, and therefore a certain inclination angle is generated; and after the inclination angle is manufactured enough, a ground hydraulic power system is stopped, and drilling is continued.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to an electromagnetic flexible nipple drilling tool suitable for geothermal wells. Background technique [0002] Working in hot dry rock high-temperature geothermal wells, the downhole temperature is as high as 200-300°C. The deflection tool works under high temperature and high load in underground wells, which is prone to fatigue fracture and overload fracture, which requires that the stress that the material needs to bear is less than the yield point of the material. The material described in the invention is suitable for manufacturing high-speed and heavy-duty drilling tools, and has high strength and good toughness. [0003] The flexible pup deflection tool can effectively realize the drilling project in one trip, without repeated tripping and replacement of the deflection tool, which saves costs and improves drilling efficiency. [0004] Therefore, in order to solve the low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/04E21B17/02E21B7/06
CPCE21B17/04E21B17/023E21B17/028E21B7/06E21B7/061
Inventor 邓嵩杨硕凌定坤贺嘉蕾马明宇王财宝王浩
Owner CHANGZHOU UNIV