Inward-pointing rotary steerable drilling tool

A rotary steerable drilling and pointing technology, which is applied in the field of oil drilling, can solve the problems of poor maturity and achieve the effects of improved stability, large adjustment range and small driving torque

Active Publication Date: 2022-04-29
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the maturity of this type of tools developed so far is relatively poor, and cannot fully meet the current demand for complex formation mining.

Method used

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  • Inward-pointing rotary steerable drilling tool
  • Inward-pointing rotary steerable drilling tool
  • Inward-pointing rotary steerable drilling tool

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Embodiment Construction

[0042] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0043] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar exp...

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Abstract

The invention discloses an inwardly pointing rotary steerable drilling tool, comprising: a hollow housing body; a drill seat adjustment structure arranged in the housing body, including: an adjustment rod, an adjustment ball seat, a support ball seat and an adjustment wedge; The lower end of the adjustment rod is connected with a drill seat, the upper end is covered with an adjustment ball seat, and the outside is provided with an adjustment wedge; the adjustment rod can rotate in the circumferential direction, and the supporting ball seat is used to provide a rotation fulcrum for the adjustment rod; the hydraulic drive mechanism includes a central tube , the servo hydraulic cylinder arranged on the periphery of the center pipe, the pressure-resistant hose arranged at the bottom of the center pipe, the pressure-resistant hose and the adjustment rod are axially connected to form a drilling fluid channel; the bottom end of the servo cylinder is driven by a pull rod to adjust the axial direction of the wedge Reciprocating movement to change the bending angle between the drill seat and the shell body and the orientation of the drill seat; the adjustment mechanism is used to control the axial movement and displacement of the hydraulic drive mechanism. The invention can improve the deflecting force of the drill bit, improve the stability in the drilling process, and the adjustment process is reliable and stable.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to an inward-pointing rotary steerable drilling tool. Background technique [0002] With the gradual reduction of conventional oil and gas resources, oil and gas exploration is gradually developing towards unconventional oil and gas resources. In order to reduce drilling costs, unconventional resources are mostly exploited by means of cluster platforms plus horizontal wells and wells with complex structures. In the drilling process of horizontal wells and wells with complex structures, it is difficult to control the wellbore trajectory, the friction torque in the horizontal section is large, and the drilling cycle is long, which greatly restricts the development process of unconventional oil and gas resources. [0003] At present, rotary steerable drilling technology is an effective way to develop such wells. The technology is mainly realized through the rotary steerabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/06
CPCE21B7/06E21B7/061
Inventor 柳贡慧汪伟李军查春青陈添
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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