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 guide drilling short section, a bit pressure torque deflection transmission mechanism, a tool face angle measuring module, a control module, a bridging line and a driving drill string, and the guide drilling short section is connected to a conventional drill string or a rotary driving device above the guide drilling short section through the driving drill string. The guide drilling short section is composed of a drill bit and a guide short section body, the guide short section body comprises a bearing body, and the drill bit is fixed to the tail end of the bearing body. The driving drill string comprises a plurality of bearing shortsections which are sequentially connected from top to bottom, the bearing short section located at the lowest portion is connected with the bearing body, every two adjacent bearing short sections arehinged through the bit pressure torque deflection transmission mechanism, and the bearing short sections and the bearing body are hinged through the bit pressure torque deflection transmission mechanism. Drilling, measuring and guiding can be effectively achieved under the condition of a short-extremely-short-radius well hole, and then guiding drilling of a high-curvature well hole or guiding drilling of an extending well hole of a high-curvature well section can be better 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 a lot 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 deflect 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 drilling branch wells...

AI Technical Summary

Problems solved by technology

[0002] The development of many oil and gas reservoirs, or solid mineral deposits that require fluidized mining, requires a lot 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 deflect 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 drilling branch wells with screw drilling tools with bent joints; existing data show that the existing screw drilling directional drilling technology And other directional drilling techniques cannot exceed the build-up rate of 15° / 30m

[0003] To sum up, if the wellbore curvature is too large, the existing directional well technology with controllable trajectory cannot be realized; if the wellbore curvature is too small, the build-up section will be too long, and the well section in the turning state will generate a large amount of invalid footage. The economic benefits are poor and the operation difficulty of the construction well section is increased

Images