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Tilt-head eccentric cylinder push type rotary guide tool

A rotary steering and cylinder technology, applied in the field of drilling tools, can solve the problems of increasing the build-up rate, etc., and achieve the effect of strong build-up ability and large build-up effect

Inactive Publication Date: 2018-12-11
徐芝香
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a key technical indicator of existing rotary steerable tools—the build-up rate—has no advantage over traditional slide-steerable drilling tools. and other positions have to continue to use traditional slide steerable drilling tools to increase the build-up rate

Method used

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  • Tilt-head eccentric cylinder push type rotary guide tool
  • Tilt-head eccentric cylinder push type rotary guide tool
  • Tilt-head eccentric cylinder push type rotary guide tool

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Embodiment Construction

[0034] It should be noted that, in the case of no conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] Combine below Figure 1 to Figure 8 , the preferred embodiments of the present invention will be described in further detail.

[0036] Such as figure 1 As shown, the cross-section of the tilting head eccentric cylinder pushing type rotary steerable tool passing through the axis of the drill string 3 and the tilting head eccentric cylinder pushing type rotary steering tool is described.

[0037] The rear end of the base 2 is fixedly connected to the drill string 3, which is used to connect the tilting head eccentric cylinder pushing type rotary steering tool to the drill string 3; the front end of the base 2 is connected to the universal joint 40, and the universal joint 40 is c...

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Abstract

The invention relates to drilling tools in the field of oil and natural gas drilling and discloses a tilt-head eccentric cylinder push type rotary guide tool with an aim to increasing deflecting effect technically. The tilt-head eccentric cylinder push type rotary guide tool is characterized by comprising a mandrel, a pedestal, a universal joint, an outer cylinder and an offset mechanism; the pedestal is connected with the universal joint, the universal joint is connected with the mandrel, and the mandrel is fixedly connected with a drill bit; the pedestal is rotatably connected to the rear end of the outer cylinder in a sleeving manner while the mandrel is rotatably connected to the front end of the outer cylinder in a sleeving manner; the offset mechanism comprises an inner eccentric cylinder, an outer eccentric cylinder, a drive mechanism A and a locking mechanism A; the drive mechanism A is arranged between the inner eccentric cylinder and the outer eccentric cylinder and can drivethe inner eccentric cylinder to move relative to the outer eccentric cylinder; the front end of the tool is tilted to one side, and the tilted direction is on the same side as the side with the minimum wall thickness of the inner eccentric cylinder. The tilt-head eccentric cylinder push type rotary guide tool has the advantages that tilted effect caused by the drill bit tiling to one side and theoffset of the external eccentric cylinder is located on the same side of the well wall, the two are superimposed to obtain stronger deflecting capability, deflecting in special position such as horizontal well deflecting section is benefited.

Description

technical field [0001] The invention relates to a drilling tool in the field of oil, natural gas and other drilling, and is a tilting head eccentric cylinder pushing type rotary steering tool. Background technique [0002] With the development of ultra-deep wells, high-difficulty directional wells, cluster wells, horizontal wells, extended-reach wells, branch wells and wells with complex three-dimensional structures, rotary steering tools have better hole purification effects, higher precision of wellbore trajectory control, and displacement The extension ability is stronger, gradually replacing the traditional sliding guide tool. However, a key technical indicator of existing rotary steerable tools—the build-up rate—has no advantage over traditional slide-steerable drilling tools. Such positions have to continue to use traditional slide steerable drilling tools to increase the build-up rate. [0003] Therefore, it is necessary to invent a new rotary steerable tool to incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/06
CPCE21B7/06
Inventor 邱世军
Owner 徐芝香