High-precision short-radius rotary steering drilling tool

Abstract

The invention discloses a high-precision short-radius rotary steering drilling tool. The high-precision short-radius rotary steering drilling tool comprises a steering drilling short section, drilling pressure torque deflection transmission mechanisms, a tool face angle measurement module, a control module, a jumper circuit and a driving drill column, wherein the steering drilling short section is connected to a conventional drill column or a rotary driving device above the steering drilling short section through the driving drill column. The steering drilling short section is composed of a drill bit and a steering short section, the steering short section comprises a bearing body, and the drill bit is fixed to the tail end of the bearing body. The driving drill column comprises a plurality of bearing short sections which are sequentially connected from top to bottom, the bearing short section located at the bottommost portion is connected with the bearing body, every two adjacent bearing short sections are hinged through the corresponding drilling pressure torque deflection transmission mechanism, and the bearing short sections and the bearing body are hinged through the corresponding drilling pressure torque deflection transmission mechanisms. By means of the high-precision short-radius rotary steering drilling tool, drilling, measurement and steering under the short-extremely-short-radius well hole condition can be effectively achieved, and high-curvature well hole steering drilling or steering drilling of a high-curvature well section extending well hole can be achieved.

Description

technical field

[0001] The invention relates to the field of short-radius rotary steerable drilling tools, in particular to a high-precision short-radius rotary steerable drilling tool. Background technique

[0002] The development of many oil and gas reservoirs, or solid mineral deposits that require fluidized mining, requires extensive use of drilling technology, even horizontal well drilling technology; because the existing directional drilling technology cannot achieve short-radius steering, it is difficult to develop ultra-thin reservoirs; or in Directional wells that are difficult to build deflection in the cap rock but require large curvature turning after entering the reservoir; or realize branch drilling as much as possible; or realize large-angle turning in shallow formations, or sidetrack branch drilling in existing wellbores In order to realize the production of side well reserves; in the prior art, the production of side well reserves is usually realized by dril...

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