Guide mechanism for directing rotary steering drilling tool

Abstract

Disclosed is a guide mechanism for a directing rotary steering drilling tool. A near-bit stabilizer is fixed to the outer end of a rotating outer sleeve, a universal unit is fixed into the rotating outer sleeve, a drill bit is mounted at the tail of an offset shaft, the upper end of the offset shaft is connected with a drilling fluid channel, a hydraulic piston is arranged on the outer surface of an offset bearing, a sensor is mounted in a hydraulic cavity, a hydraulic medium channel is positioned inside the rotating outer sleeve and connected with two servo valves, the servo valves are connected with a control unit, a hydraulic pump is connected with a motor, the motor is connected with a turbine, and the drilling fluid channel is arranged at the tail end of the turbine. Under the action of hydraulic pressure, an offset mechanism shifts, a universal shaft is inclined, and a hydraulic telescopic block is dynamically adjustable, so that the variable universal shaft is kept at a certain angle during drilling. Mud drives a generator to generate power for providing energy to the hydraulic pump, a whole hydraulic system adopts servo control, and the guide mechanism has the advantages of systematic flexibility, fine stress, accuracy in control of well deflection positions and fine borehole quality.

Description

technical field [0001] The invention relates to an oil exploration steering drilling tool, in particular to a guiding mechanism of a pointing rotary steering drilling tool. Background technique [0002] With the development of the petroleum industry, it becomes necessary to develop deep wells, ultra-deep wells, extended-reach wells, horizontal wells, and multi-target wells. And it is necessary to face some complex structural strata such as oceans and deserts more often. The difficulty of exploration and development has greatly increased. These current situations have put forward a series of new requirements for drilling technology, such as improving efficiency, improving drilling capabilities in harsh environments and complex geological conditions, and realizing intelligence. [0003] Rotary steerable drilling technology is a high-tech in the field of drilling engineering, representing the development direction of the world's advanced drilling technology. At present, comp...

AI Technical Summary

Problems solved by technology

At present, complex and difficult wells such as horizontal wells, extended-reach wells, and lateral wells are booming all over the world. Conventional drilling technology is difficult to meet the needs, and has its own insurmountable shortcomings: poor wellbore trajectory control accuracy, drilling limit depth Restricted, poor wellbore cleaning, lower drilling speed caused by more tripping times, etc.

Heavy wear on the drill and drill bearings

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