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Stepless adjustable borehole trace control tool

A technology for wellbore trajectory and control tools, which is applied in drilling equipment, directional drilling, drilling equipment and methods, etc. The effect of drilling efficiency, reducing the risk of sticking and saving operation time

Inactive Publication Date: 2012-04-04
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For highly deviated wells and extended reach wells, it is difficult or even impossible for conventional dynamic drilling tools to meet the needs. To complete complex borehole trajectories, especially to truly realize downhole closed-loop control, traditional drilling tools can no longer meet the requirements

Method used

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  • Stepless adjustable borehole trace control tool
  • Stepless adjustable borehole trace control tool
  • Stepless adjustable borehole trace control tool

Examples

Experimental program
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Effect test

Embodiment Construction

[0018] The stepless adjustable borehole trajectory control tool of the present invention consists of a drill string 1, a mandrel 2, an upper end dynamic sealing device 3, a thrust bearing 4, an anti-rotation device 5, an electromagnetic coupling device 6, a spring 7, a pressure hole 8, and a piston 9 , hydraulic limit switch 10, radial bearing 11, upper coupling 12, outer ring electromagnetic clutch 13, outer ring harmonic drive 14, eccentric mechanism 15, inner ring harmonic drive 16, inner ring electromagnetic clutch 17, The lower end coupling 18, the spherical bearing 19, the lower end dynamic sealing device 20, and the drill bit 21 are composed; the upper end of the drill string 1 is connected with the drill pipe, and the lower end is connected with the mandrel 2; the mandrel 2 is a hollow rotating shaft, with multiple The bearing fixes it in the middle of the tool shell and is the power source of the whole tool. The power of the mandrel 2 is provided by the upper drill pip...

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Abstract

The invention relates to a stepless adjustable borehole trace control tool and belongs to the technical field of design of an oil drilling tool. The stepless adjustable borehole trace control tool is characterized in that: an outer ring electromagnetic clutch (13), an outer ring harmonic transmission device (14), an eccentric mechanism (15), an inner ring harmonic transmission device (16), an inner ring electromagnetic clutch (17) and a lower end coupling (18) are sequentially arranged at the lower end of an upper end coupling (12); the installation positions of the inner ring harmonic transmission device (16), the inner ring electromagnetic clutch (17) and the lower end coupling (18) and the installation positions of the outer ring harmonic transmission device (14), the outer ring electromagnetic clutch (13) and the upper end coupling (12) are in full symmetry about the eccentric mechanism (15); and connection modes of the components are the same. By adoption of the stepless adjustable borehole trace control tool, adjustable control of a deflection angle can be realized, and stepless deflection in any direction in a circumference range of 360 DEG can be realized. The stepless adjustable borehole trace control tool has the characteristics of high trace control accuracy, high quality of a well bore, high purification capacity of a borehole and high displacement extension capacity.

Description

Technical field: [0001] The invention relates to a steplessly adjustable wellbore trajectory control tool, which belongs to the technical field of petroleum drilling tool design. Background technique: [0002] Since most oil fields at home and abroad are already in the late stage of development, most of the new exploration blocks are in special environments, such as oceans, beaches, deserts and other areas, which greatly increases the difficulty and cost of exploration and development. On the other hand, in order to achieve stable production, mature oilfields are faced with the development of a large number of marginal oil and gas reservoirs, independent small oil and gas reservoirs, complex fault block oil and gas reservoirs, ultra-thin oil and gas reservoirs and other difficult-to-produce reserves. The needs of the exploration and development situation promote the evolution and development of well types. Wells with complex structures such as extended-reach wells, horizonta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B7/04E21B7/08
Inventor 冯定袁咏心王鹏刘旭辉吴力
Owner YANGTZE UNIVERSITY
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