Controller for realizing full-rotation composite orientation of drill string

Abstract

The invention relates to a controller for realizing full-rotation composite orientation of a drill stem, which comprises an upper joint, an upper cylinder, an upper TC bearing sealing retainer ring, an upper TC bearing moving component, an upper string bearing, an upper string bearing inner retainer ring, an upper string bearing outer retainer ring, a sealing ring, a control screw, a clutch shell, a reset spring A, a clutch conversion cylinder, a spline shell, a spline sleeve, a mandrel and a reset spring B, the lower TC bearing moving assembly comprises a lower TC bearing inner retainer ring, a lower string bearing, a lower TC bearing moving assembly and a lower end cover. A circumferential sliding groove is formed in the outer wall of the upper end of the clutch conversion cylinder, and the control screw is matched with the sliding groove of the clutch conversion cylinder to control the clutch state and the clutch state of the clutch conversion cylinder. When the clutch conversion cylinder is in a closed state, the clutch conversion cylinder is matched with the spline housing, the drilling tool conducts composite drilling, when the clutch conversion cylinder is in a separated state, the clutch conversion cylinder is matched with the spline housing in a separated mode, and the drilling tool conducts sliding drilling.

Description

technical field [0001] The invention relates to a controller used in the field of drilling engineering to realize full-rotation compound orientation of a drill string. Its main application fields include oil and gas drilling engineering, geological exploration, geothermal and new oil and gas resource exploitation, and the like. Background technique [0002] Directional drilling is a drilling process that enables the wellbore to reach the target layer along a pre-designed direction and trajectory. The existing directional drilling technologies are divided into curved screw directional and rotary steering technologies. Bent screw orientation is low in cost and belongs to sliding orientation, which can easily lead to severe drill string drag, low drilling efficiency and ROP, difficult to control wellbore trajectory, and difficult to discharge drill cuttings accumulation. The working method of rotary steerable RSS is rotary drilling, and its drilling efficiency is greatly improv...

AI Technical Summary

Problems solved by technology

[0005] In order to explore and solve the problems of low drilling efficiency and drilling speed during directional sliding drilling described in the background technology, difficulty in controlling the wellbore trajectory, high cost of rotary drilling, and high risk of being buried when the drill is stuck, the present invention provides a drilling A controller for column full rotation compound orientation

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