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Push-the-bit fully-rotary guiding tool

A rotary steering and full rotation technology, applied in directional drilling, drilling equipment, drilling equipment and methods, etc., to achieve the effect of simple tool structure, large lateral force and convenient installation

Inactive Publication Date: 2017-01-04
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current sliding drilling technology can no longer meet the needs of modern drilling, so the development of new rotary steerable drilling tools has gradually become an important direction for the development of drilling technology

Method used

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  • Push-the-bit fully-rotary guiding tool
  • Push-the-bit fully-rotary guiding tool
  • Push-the-bit fully-rotary guiding tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] See attached figure 1 , the push-to-type full-rotation guide tool is composed of a centralizer mechanism, a guide actuator, and a spline cardan shaft mechanism. The front end of the guide actuator is connected to the spline cardan shaft mechanism, and the rear end is connected to the centralizer mechanism; The device mechanism includes a locking ring 1, a snap ring 2, a variable diameter block 3, and a centralizer main body 4. After the variable diameter block 3 is welded on the snap ring 2, the assembly is installed on the centralizer main body 4, and the lock is used to The tight ring 1 is locked and fixed, and the snap ring 2 is composed of left and right parts. The left and right parts are connected together through rectangular teeth. When the rotary steering tool is guiding drilling, the variable diameter block 3 contacts the well wall to realize the function of...

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Abstract

The invention relates to a push-the-bit fully-rotary guiding tool. The push-the-bit fully-rotary guiding tool comprises a centralizer mechanism, a guiding actuating mechanism and a spline cardan shaft mechanism. The front end of the guiding actuating mechanism is connected with the spline cardan shaft mechanism; the rear end of the guiding actuating mechanism is connected with the centralizer mechanism; and when the rotary guiding tool conducts guiding drilling, a controlling system controls a down-hole motor to enable a specific hole in a big gear to communicate with drilling liquid channels in an upper main body and a lower main body of the guiding mechanism at a specific position so as to adjust an irrotational shell to the position where a needed guiding well deflection and a needed guiding direction are the same, then a drilling tool conducts drilling along the needed well deflection and the needed direction, and a well track is monitored by all while-drilling testing instruments at any time. The push-the-bit fully-rotary guiding tool has the characteristics that the build-up rate is high, application range is wide, and the obtained well track is high in quality.

Description

technical field [0001] The invention relates to a pushing-type full-rotation steering tool used in the field of oil and gas engineering, which is mainly used in drilling engineering. Background technique [0002] The rotary steerable system is a closed-loop automatic control system that integrates mechanics, electricity and hydraulics, and is characterized by rotary drilling. It is a common tool for drilling operations in long and stable sections of extended reach wells, and is also suitable for drilling and control operations in horizontal sections of horizontal wells (especially horizontal wells with thin oil and water layers). Since the late 1980s, the international community began to strengthen research on rotary steerable drilling technology; by the early 1990s, rotary steerable drilling technology had been commercialized. At present, the rotary steerable system is also being developed in China. From the application examples in various oil fields and blocks, the rotary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B17/10
CPCE21B7/04E21B7/046E21B17/1078
Inventor 田家林杨应林杨琳胡书辉蔡旭东杜凡周韬
Owner SOUTHWEST PETROLEUM UNIV
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