Dynamic point-the-bit rotary steering drilling tool

A technology of rotary steerable drilling and dynamic pointing, applied in directional drilling, drilling equipment, automatic control system of drilling, etc., can solve the problems of inability to know the details of the eccentric mechanism, damage to the static state of the eccentric shaft, and small acting torque.
CN102913131AInactive Publication Date: 2013-02-06CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2013-02-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a dynamic point-the-bit rotary steering drilling tool. The dynamic point-the-bit rotary steering drilling tool comprises a rotary outer cylinder, a stable platform, a steering offset mechanism, a bit pressure transfer mechanism, a torque transfer mechanism, an upper support plate, a lower support plate, a drill shaft, a drill bit, a sealed corrugated pipe, a drill shaft connecting bearing and a conductive slip ring, and is characterized in that the rotary outer cylinder is used for directly applying bit pressure and torque on the drill bit and driving the drill shaft and the drill bit to rotate jointly, information of hole deviation angle and azimuth angle to be controlled can be calculated by a calculating unit according to a preset borehole trajectory parameter or a remote control command of a ground monitoring system, and precision control of bend angle, in particular to the hole deviation angle and the azimuth angle of the offset mechanism can be realized by adopting a geostationary control method of the stable platform and combining with working principles of a hydraulic drive piston and the steering offset mechanism.
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Description

technical field

[0001] The invention relates to the technical field of oil and gas drilling, in particular to a dynamic pointing rotary steerable drilling tool. Background technique

[0002] As most oil and gas fields at home and abroad have successively entered the middle and late stages of development, the difficulty of oil and gas reservoir development has gradually increased, and the characteristics of the drilled formations have become increasingly complex. Drilling technologies such as multilateral wells put forward higher requirements. Rotary steerable drilling technology is a cutting-edge closed-loop automatic drilling technology developed in recent years, and its appearance is a qualitative leap in the world's drilling technology.

[0003] The downhole rotary steerable drilling tool system is divided into push-and-point type and point-to-point type according to its guiding mode, and can be divided into static bias type and dynamic bias type according to the working...

Claims

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