Hydraulic push rotary steering tool

Abstract

The invention relates to the technical field of rotary steering tools, in particular to a hydraulic push rotary steering tool which comprises a mandrel, a mandrel hydraulic path connecting sleeve, anupper sleeve body, an upper sealing bearing assembly, a middle sleeve body, a dynamic and static hydraulic path connecting assembly, hydraulic push assemblies, a lower joint, a lower sleeve body and alower sealing bearing assembly. The hydraulic push rotary steering tool is reasonable and compact in structure and convenient to use, liquid pressure is transformed into push force, the push force ofeach hydraulic push assembly is controlled by controlling the pressure of hydraulic oil in each hydraulic push branch to obtain target steering force in steering operation, installation of any electric control devices is omitted, structures are simplified, and radial sizes are reduced. Moreover, the hydraulic oil of a hydraulic system is high-temperature-resistant aviation hydraulic oil and applicable to high-temperature environments, so that the hydraulic push rotary steering tool has the advantages of a general rotary steering drilling tool and further has the advantages of high build-up rate, high-temperature resistance, stable build-up performances, applicability to small-sized boreholes and the like.

Description

technical field [0001] The invention relates to the technical field of rotary guiding tools, and relates to a hydraulic pushing type rotary guiding tool. Background technique [0002] As oilfields around the world have entered the later stage of development, the difficulty of reservoir development has gradually increased, and the formations encountered have become increasingly complex. The challenges faced in the new era have pushed the development of oil and gas fields from conventional development techniques to horizontal wells, extended-reach directional wells, multilateral wells, and small wells. At the same time, the new development technology puts forward higher requirements for drilling technology. The traditional directional drilling technology is mainly based on the sliding-steering technology, but the sliding-steering technology has problems such as large axial friction, difficult cuttings removal during drilling, low drilling efficiency, and rough boreholes. Sinc...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a hydraulic push-on rotary steering tool, which overcomes the deficiencies of the above-mentioned prior art, and can effectively solve the problems of low deflection ability and well diameter application range of push-on rotary steering tools relying on the principle of motor pumps. Problems with small size and large interference with guiding performance

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