Working system and working mode of shear valve mud pulse generator

Abstract

The invention provides a working system of a slurry pulse generator of a shearing valve and a working mode for switching a motor. The working system comprises a measuring sensor, a data encoder, a control circuit, a driving circuit, a real-time demodulation unit, the motor, a communication circuit and an underground command downloading device, wherein the real-time demodulation unit is used for collecting data of a pressure sensor on the ground surface and conducting demodulation; the motor is connected with the control circuit; the communication circuit is connected with the driving circuit, a power source and filtering unit, a power supply unit and an inner pressure measuring sensor, and the power source and filtering unit is connected with the control circuit; and the underground command downloading device is used for rapid responding through pneumatic driving, and thus the shunting change of the underground command downloading device can be detected by a turbine generator. According to the working system, the liquid supply amount of a slurry pump to the underground space is changed, the flow and pressure in a drill column are changed, the underground turbine generator or the pressure sensor can detect the changes, a command is given to the control circuit of the slurry pulse generator, the driving circuit drives the motor, and the working modes can be switched.

Description

technical field [0001] The invention relates to oil exploitation equipment technology, in particular to a shear valve mud pulse generator working system and its working mode. Background technique [0002] The mud pulse generator remote transmission system is an important part of the measurement while drilling (Measure While Drilling: MWD) and logging while drilling (Logging While Drilling: LWD) equipment, and it is an important means to transmit downhole information to the surface in real time. With the continuous development of formation evaluation technology, the amount of downhole data is gradually increasing, and a pulse generator with a higher transmission rate is required. The transmission rate of the MWD system has gradually become the bottleneck restricting the downhole data upload. [0003] The schematic diagram of the drilling system is attached figure 1 , mainly including mud pool 1, mud pump 2, data acquisition and processing system 3, derrick 4, hook 5, drill ...

AI Technical Summary

Problems solved by technology

However, the amplitude of the mud pulse pressure wave is large, which will cause problems such as increased power of the downhole motor and excessive wear of moving parts.

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