Half-way rotary well track control tool

Abstract

The invention belongs to the technical filed of drilling in the field of oil and natural gas, in particular to a half-way rotary well track control tool. The half-way rotary well track control tool ischaracterized in that the half-way rotary well track control tool comprises a shell, a support sleeve, an outer barrel, a mechanical clutch pup joint arranged in the shell, and an electric control pup joint arranged in the outer barrel, the electric control pup joint comprises an electronic module, a direct current motor and a telescopic mechanism, the mechanical clutch pup joint comprises an upper joint, an upper half clutch, a center rod, a lower half clutch, an upper pressing cap, a bearing assembly, a seal combination, a group of piston claw, a reset spring, the bottom of the center rod is connected with the telescopic mechanism in a threaded mode, the lower half clutch is connected with the upper part of the center rod, and the bottom end of the outer barrel is provided with a lowerjoint. According to the half-way rotary well track control tool, use is convenient, the cost is low, reliable and effective well track control can be realized, an upper part pipe column of the half-way rotary well track control tool completely rotates, ranges of friction reduction and drag reduction are large, and at the same time, the well cleaning ability can be improved; and compared with rapidsliding drilling, technical advantages are obvious, and compared with a rotary guide drilling tool, economic applicability is good.

Description

technical field [0001] The invention belongs to the technical field of drilling in the field of petroleum and natural gas, and in particular relates to a half-rotary wellbore trajectory control tool. Background technique [0002] With the development of oilfields in the middle and later stages and the development of unconventional oil and gas resources such as shale gas, the application of long horizontal section horizontal wells, cluster wells, extended reach wells and five-section wells is becoming more and more extensive. The problem caused by high frictional resistance is particularly prominent, which seriously restricts the extension of the length of the horizontal section and the speed increase of directional drilling. In conventional directional drilling, due to the high wear resistance, the back pressure cannot be effectively transmitted to the drill bit, and problems such as tool face instability and slow ROP often occur. Rotary steerable drilling can solve the fri...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a half-rotary wellbore trajectory control tool, which can realize the function of rotating the upper drill string to drill and the downhole power drilling tool to perform sliding and directional drilling at the same time through the torque "clutch-on" mode, thereby greatly reducing the During sliding directional drilling, the friction of the drill string can relieve the back pressure, stabilize the tool face, and improve the trajectory control ability of the wellbore, so as to solve the problems of difficult orientation and low ROP in the directional section of the long-horizontal horizontal well in Weiyuan

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