Short-radius drilling tool

A short-radius drilling and tool technology, applied in the field of drilling, can solve the problems of long deflection section, small wellbore curvature, large wellbore curvature, etc., and achieve the effect of shortening the length, eliminating a lot of space and the hidden dangers brought by

Pending Publication Date: 2021-01-26
万晓跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing data show that the existing screw drilling directional drilling technology and other directional drilling technologies cannot exceed the build-up rate of 15° / 30m
[0003] To sum up, if the wellbore curvature is too large, the existing directional well technology with controllable trajectory cannot be realized; if the wellbore curvature is too small, the build-up section will be too long, and the well section in the turning state will generate a large amount of invalid footage. The economic benefits are poor and the operation difficulty of the construction well section is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0077]Such asfigure 1 As shown, the upper end of the drill bit 110 is coaxially connected with a transmission lever 111. Specifically, the transmission lever 111 is cylindrical, and the transmission lever 111 penetrates the inside of the carrier body 121. Preferably, the transmission lever 111 and the drill bit 110 are integrated Structure, or, the transmission lever 111 is welded and connected to the upper end of the drill bit 110, the transmission lever 111 is connected to the lower part of the carrier body 121 through the controllable universal joint 112, and a movable gap is formed between the transmission lever 111 and the carrier body 121 to deflect The guiding mechanism 130 is arranged in the movable gap and above the controllable universal joint 112. The driving piston 1312 can abut against the well wall through the transmission lever 111, and the expansion and contraction of the driving piston 1312 can drive the transmission lever 111 around the controllable universal joint...

Embodiment approach 2

[0083]Such asfigure 2 As shown, the driving hydraulic cylinder 131 is arranged below the weight-on-bit torque deflection transmission mechanism 220 connected to the carrying body 121, and the distance from the setting position of the driving hydraulic cylinder 131 to the drill bit 110 is smaller than that of the driving hydraulic cylinder 131 to the carrying body 121. The distance between the connected WOB torque deflection transmission mechanism 220, so that the point of action of the thrust force is closer to the drill bit 110 and away from the turning point, so as to drive the drill bit 110 to deflect in the guiding direction;

[0084]The electric drive actuator 140 includes a rotary valve 141 and a drive motor 142. The carrying body 121 is provided with a through flow passage 1211. The rotary valve 141 can periodically connect the through flow passage 1211 with the driving hydraulic cylinder 131 so that the driving piston 1312 can be As the drill string rotates, it periodically abu...

Embodiment approach 3

[0088]Such asimage 3 withFigure 4 As shown, the driving hydraulic cylinder 131 is arranged below the weight-on-bit torque deflection transmission mechanism 220 connected to the carrying body 121, and the distance from the setting position of the driving hydraulic cylinder 131 to the drill bit 110 is smaller than that of the driving hydraulic cylinder 131 to the carrying body 121. The distance between the connected WOB torque deflection transmission mechanism 220, so that the point of action of the thrust force is closer to the drill bit 110 and away from the turning point, so as to drive the drill bit 110 to deflect in the guiding direction;

[0089]The electric drive actuator 140 includes a rotary valve 141 and a drive motor 142. The carrier body 121 is provided with a through flow passage 1211. The rotary valve 141 can periodically communicate with the drive hydraulic cylinder 131 through the through flow passage 1211. The drive motor 142 is electrically driven The actuator drive con...

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Abstract

The invention provides a short-radius drilling tool. The short-radius drilling tool comprises a guide drilling short section, a driving drill string and a driving control short section, the guide drilling short section comprises a guide short section and a drill bit, the guide short section comprises a bearing body, a deflection guide mechanism and an electric driving actuator are arranged on thebearing body, the drill bit is connected with the bearing body, the deflection guide mechanism can drive the drill bit to deflect in a preset direction, the driving drill string comprises a pluralityof bearing short sections which are sequentially connected from top to bottom, the bearing short section located at the lowest position is connected with the bearing body, every two adjacent bearing short sections are hinged through a bit pressure torque deflection transmission mechanism, the bearing short sections are hinged to the bearing body through the bit pressure torque deflection transmission mechanism, the driving control short section is provided with an electric driving actuator driving control circuit, and the electric driving actuator driving control circuit is electrically connected with the electric driving actuator through a jumper circuit. According to the short-radius drilling tool, the short build-up rate can be achieved, the length of the guide short section is effectively shortened, and then the directional drilling function can be achieved in a high-curvature borehole more easily.

Description

Technical field[0001]The invention relates to the field of drilling technology, in particular to a short radius drilling tool.Background technique[0002]The development of many oil and gas reservoirs or solid mineral deposits that require fluidized mining requires extensive use of drilling technology, even horizontal well drilling technology. Because the existing directional drilling technology cannot achieve short-radius steering, it is difficult to develop ultra-thin reservoirs; or directional wells that are difficult to deflect in the caprock but require large curvature steering after entering the reservoir; or achieve branching as much as possible Drilling; or to achieve large-angle turns in shallow formations, or to achieve the production of side-well reserves by sidetracking lateral wells in existing boreholes. In the prior art, screw drilling tools with bent joints are usually used to drill branch wells to realize the production of side-well reserves. Existing data indicate th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/06
CPCE21B7/061
Inventor 徐梓辰万晓跃其他发明人请求不公开姓名
Owner 万晓跃
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