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Dynamic deflecting rotary steering tool

A rotary steerable and rotary steerable drilling technology, applied in directional drilling and other directions, can solve the problems of non-compactness, many internal cavities, complex structure, etc., and achieve the effect of reducing requirements, less internal cavities, and large contact area

Active Publication Date: 2018-10-16
西安长庆同欣石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem addressed by the present invention is: the existing rotary steerable drilling tool has a complex structure, many internal cavities, and is not compact

Method used

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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 1 0, the preferred embodiments of the present invention are described in further detail.

[0036] Such as figure 1 As shown, it shows the comparison between the dynamic deflectable rotary steerable tool 1 in the stable state and the deflection state; the upper left is the dynamic deflectable rotary steerable tool 1 in the stable state, the drill bit 2 and the drill string 3 are on the same axis, No targeted unilateral cutting of the well wall; the bottom right is the deflection state of the dynamic deflectable rotary steering tool 1, the drill bit 2 deviates from the axis of the drill string 3, and protrudes upwards, thereby increasing the sing...

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PUM

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Abstract

The invention relates to a drilling tool in the drilling fields such as petroleum and natural gas, in particular to a dynamic deflecting rotary steering tool. The dynamic deflecting rotary steering tool aims at the problem that an existing rotary steering drilling tool is complex in structure, large in number of inner cavities and not compact. According to the scheme, a drill bit is deflected to one side of the wall of a well in a settable mode by using two adjustable eccentric cylinders fixed in a circular sleeve. The dynamic deflecting rotary steering tool has the characteristics that the dynamic deflecting rotary steering tool comprises a main shaft, the inner eccentric cylinder, the outer eccentric cylinder, the circular sleeve, a driving mechanism A, a locking mechanism A, a locking mechanism B, a locking mechanism C and a driving mechanism B; the main shaft is rotatably sleeved with the inner eccentric cylinder, and the inner eccentric cylinder is rotatably sleeved with the outereccentric cylinder; and the outer eccentric cylinder is rotatably sleeved with one end of the circular sleeve, and a drilling column is fixedly connected with the other end of the circular sleeve. The dynamic deflecting rotary steering tool has the beneficial effects that the two adjustable eccentric cylinders are used for adjusting to enable the drill bit to offset, so that single-edge cutting of the drill bit is increased, and the purpose of guiding is realized.

Description

technical field [0001] The invention relates to a drilling tool in the field of oil, natural gas and other drilling, and is a dynamic deflectable rotary steering tool. Background technique [0002] In the prior art, there are mainly two types of rotary steerable drilling tools: push-by type and point-to-point type. Among them, the push-to-type rotary steerable drilling tool is equipped with three retractable ribs evenly on the outer periphery of the tool, and the three ribs can be selectively pushed against the well wall in the set direction, causing the bit to deviate, thereby increasing the single-piece of the drill bit. Cutting on the side, realize the control of the drilling direction of the drill bit, and achieve the purpose of steering; however, the volume, especially the radius, of the steering drilling tool is limited, and the three retractable ribs make the structure complex and the internal cavity is large , high requirements on materials. [0003] The pointing r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04
CPCE21B7/04
Inventor 邱世军
Owner 西安长庆同欣石油科技有限公司
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