Automatic ground control device and method for downhole quick orientation and collimation

Abstract

The invention relates to an automatic ground control device and method for downhole quick orientation and collimation, and belongs to the technical field of design of petroleum drilling tools. The automatic ground control device is composed of a rotary plate, a computer and a torque sensor, the rotary plate is arranged on a derrick, a variable frequency motor, a frequency converter, the computer and a driller input control cabinet are installed on one side of the rotary plate in sequence, a drilling pipe is installed on the rotary plate, and the portion, close to the rotary plate, of the drilling pipe is provided with the torque sensor electrically connected with the computer. The end tip of the drilling pipe is provided with a drill tip through a guide motor. The control method comprisesthe following steps of data collection, data processing and control. According to the control device and method, the drilling pipe does stop rotating in the control process, during the drilling period, the drill tip does not leave from a downhole, and during drilling, correction of a tool face can be conducted. In this way, the borehole purifying efficiency can be improved, the axial friction generated when a drill string moves forwards can be reduced, and the problems are solved that in an existing drilling process, the borehole purifying efficiency is low, the axial friction generated when the drill string moves forwards is high, and the guide motor is prone to speed loss.

Description

technical field [0001] The invention relates to a ground automatic control device and method for downhole fast directional aiming, belonging to the technical field of petroleum drilling tool design. Background technique [0002] Rotary steerable drilling tools and motor / measurement-while-drilling tools are commonly used tools in directional drilling. Due to the high cost of rotary steerable tools and the requirements for borehole size, their use in onshore drilling is limited, and economically It is also not feasible; while the motor / measurement while drilling system includes a downhole mud motor and a motor bending casing, the drill string does not rotate during sliding drilling, but slides along the axial direction of the well wall, through the bending casing joint Therefore, during the drilling process, there are problems such as low wellbore purification efficiency, large axial friction when the drill string advances, and easy stalling of the steering motor, which leads ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a downhole rapid directional control system that meets the actual needs of the oil drilling site and solves the problems of low wellbore purification efficiency, large axial friction when the drill string advances, and easy stalling of the steering motor in the existing drilling process. Aiming ground automatic control method and device

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