Power line carrier communication method for oil field underground testing and adjusting equipment

Abstract

The invention aims to solve the problems of unavailable real-time reading of underground working parameters and data by oil field underground testing and adjusting equipment, excessively complex operation, low efficiency and the like, provides a power line carrier communication method for the oil field underground testing and adjusting equipment and aims to transmit the acquired working parameters of a water well and an oil well to the ground in a digital mode through a power line when an underground testing and adjusting instrument runs under the well, control the operation of an underground instrument and meet the requirements of the real-time monitoring, adjustment and control of the working situations of the water well and the oil well in an oil field. The method is characterized in that: power carrier communication technology is combined with frequency shift keying (FSK) modulation and demodulation technology; a high-voltage direct current power line (voltage magnitude is between 90 and 190 V) which connects a ground control instrument with the underground testing and adjusting instrument is taken as a transmission medium; and a double-frequency FSK carrier modulation and demodulation mode for bearing binary 1 and 0 by two frequencies is adopted so as to realize real-time communication between the ground control instrument and the underground testing and adjusting instrument.

Description

technical field [0001] The invention relates to a carrier communication method, in particular to a power line carrier communication method used for oil field downhole measurement and adjustment equipment. technical background [0002] In the field of petroleum production, in order to ensure the production efficiency and production safety of the oilfield, it is necessary to monitor and control the flow, pressure, temperature and other working parameters of the downhole. [0003] At present, there are generally two extraction methods for the collected data of downhole measurement and adjustment equipment in oilfields: [0004] One is storage monitoring. The specific method is to put the measurement and adjustment equipment downhole, use the MCU in the equipment to store the collected data through the memory, and then lift the measurement and adjustment equipment to the well to read the data and analyze the change law of the downhole flow rate. , and then put the measuring and...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problems that the above-mentioned oil field downhole measurement and adjustment equipment cannot read the downhole working parameters and data in real time, the operation is too cumbersome, and the efficiency is low, and provides a power line carrier communication method for the oil field downhole measurement and adjustment equipment. It enables the downhole measuring and adjusting instrument to digitally transmit the collected working parameters of water wells and oil wells to the ground through the power line when the downhole measuring and adjusting instrument is working downhole, and at the same time control the work of downhole instruments to meet the real-time monitoring of the working conditions of oilfield water wells and oil wells and regulation

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