Bidirectional force-bearing slurry bearing device and rotating guiding tool utilizing same

A bearing device and rotational guidance technology, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problems of reduced life of rolling bearings, inability to work with high life, and the inability of conventional rolling bearings to withstand bidirectional axial forces. Increased force, high drilling life and low bending stress
CN108222833AActive Publication Date: 2018-06-29INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Publication Date
2018-06-29

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Abstract

The invention mainly belongs to the technical field of rotating guiding systems and particularly relates to a bidirectional force-bearing slurry bearing device and a rotating guiding tool utilizing the same. The bidirectional force-bearing slurry bearing device is arranged between non-rotating outer sleeves and a drill bit shaft on the lower portion of the rotating guiding tool and used for isolating rotating movement of the drill bit shaft so as to enable the non-rotating outer sleeves of the rotating guiding tool not to rotate in a relatively-large mode. Through the bidirectional force-bearing slurry bearing device, the non-rotating outer sleeves can be positioned in the radial direction and the biaxial direction and supported on the drill bit shaft, and accordingly the rotating guidingtool can work in bad slurry. The rotating guiding tool adopts the static internal pushing-abutting hinging type design; by hinging a non-rotating measurement and control body and a non-rotating execution mechanism body, the non-integral type structure is achieved; and a drilling tool is easily bent in a borehole, and thus bending stress to the upper portion of the guiding tool is small.
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Description

technical field

[0001] The invention mainly belongs to the technical field of rotary steering systems, and in particular relates to a two-way load-bearing mud bearing device and a rotary guiding tool using the bearing device. Background technique

[0002] Rotary steerable technology belongs to the field of directional drilling, and is mainly used for three-dimensional trajectory well drilling such as directional wells, horizontal wells, and extended-reach wells. Relying on its own high-precision servo control mechanism and high-precision attitude measurement sensor, it can accurately control the drilling direction of the drill bit in real time, thereby realizing the control of the wellbore trajectory. The former conventional low build-up rate (6.5Β° / 30m) rotary steerable tool can no longer meet the needs of shale gas directional well drilling and offshore land high curvature well drilling. for example:

[0003] The Baker Hughes AutoTrak Curve rotary steerable tool uses thre...

Claims

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