Control device for composite directional drilling and using method

Abstract

The invention discloses a control device for composite directional drilling and a using method. The control device comprises an upper connector, a reset module, an execution control module, an auxiliary module, an anti-falling module and a lower connector. According to the technical scheme, during composite drilling, splines of the control device are in a meshed state, and a mandrel drives a shaft bottom drilling tool assembly connected with a lower connector to rotate together; during directional sliding drilling, the drilling pressure is increased, the drilling pressure is transmitted to the upper connector from an upper drill column, a disc spring in the control device is compressed, a spline is in a disengaged state, and the shell will not drive the mandrel to rotate; when the drilling pressure is reduced, the control device resets by means of thrust of the disc spring, the spline is in the meshed state again, and at the moment, the composite drilling state is achieved. According to the control device for achieving composite directional drilling through the bit pressure, switching between composite drilling and directional sliding drilling can be achieved, the drilling efficiency is improved, the drilling jamming risk is reduced, and cost is greatly saved.

Description

technical field [0001] The present invention relates to a control device and usage method for composite directional drilling in the field of drilling engineering. ) exploration and development projects. Background technique [0002] With the continuous development of oil drilling and production technology, the difficulty of oil and gas development is gradually increasing, the stratum environment is becoming more and more complex, and more and more challenges are faced. Directional drilling technology has become an important means to improve the efficiency of oil and natural gas extraction. The economical and efficient exploitation of modern oil and gas resources can be realized through technologies such as directional wells. Existing directional drilling technologies include curved screw directional and rotary steerable technologies. Bent screw orientation is low in cost and belongs to sliding orientation, which can easily lead to severe drill string drag, low drilling eff...

AI Technical Summary

Problems solved by technology

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 rotary steerable drilling system can reduce the resistance caused by the sliding of the drill string due to the full rotation of the drill string during the drilling process, improve the transmission efficiency of the drilling pressure, and greatly improve the wellbore cleaning effect, but its manufacturing, use, and maintenance costs Too high, in case of problems such as drill sticking, the economic loss will be greater

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