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Inward pushing directional type rotary steering drilling tool

A rotary steerable drilling, pointing technology, applied in the field of oil drilling, can solve problems such as poor maturity

Active Publication Date: 2021-07-06
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 pushing directional type rotary steering drilling tool
  • Inward pushing directional type rotary steering drilling tool
  • Inward pushing directional type rotary steering 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 inward pushing directional type rotary steering drilling tool. The tool comprises a hollow outer shell body, a drill bit seat adjusting structure, a hydraulic driving mechanism and an adjusting mechanism, wherein, the drill bit seat adjusting structure is arranged in the outer shell body and comprises an adjusting rod, an adjusting ball seat, a supporting ball seat and an adjusting wedge block; the lower end of the adjusting rod is connected with a drill bit seat, the upper end of the adjusting rod is sleeved with the adjusting ball seat, and the adjusting wedge block is arranged outside the adjusting rod; the adjusting rod can rotate in the circumferential direction, and the supporting ball seat is used for providing a rotating fulcrum for the adjusting rod; the hydraulic driving mechanism comprises a central pipe, a servo hydraulic cylinder arranged on the periphery of the central pipe and a pressure-resistant hose arranged at the bottom end of the central pipe, and the pressure-resistant hose and the adjusting rod penetrate axially to form a drilling fluid channel; the bottom end of the servo hydraulic cylinder drives the adjusting wedge block to axially reciprocate through a pull rod so as to change the bending angle between the drill bit seat and the outer shell body and the direction of the drill bit seat; and the adjusting mechanism is used for controlling the axial movement and displacement of the hydraulic driving mechanism. According to the inward pushing directional type rotary steering drilling tool, the deflecting force of a drill bit can be improved, the stability in the drilling process is improved, and the adjusting 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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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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