Oil well alloy superconducting wax and pressure-measuring and temperature-measuring device

Abstract

An oil well alloy superconducting wax and pressure-measuring and temperature-measuring device comprises a cable body and a control system, wherein the cable body penetrates into a hollow oil pumping rod; temperature sensors for measuring different depth sections of an underground wax precipitation area are distributed in the cable body; a pressure transmitter is arranged at the bottom of the cable body; the temperature sensors and the pressure transmitter are electrically connected with the overground control system through leads which penetrate into the cable body; the control system comprises a controller; the input end of the controller is connected with the temperature sensors and the pressure transmitter; a superconducting alloy wire is arranged in the cable body and is electrified with power-frequency or medium-frequency alternating current. On one hand, the oil well alloy superconducting wax and pressure-measuring and temperature-measuring device can generate high heat, can heat crude oil of the wax precipitation section in an oil pipe in the whole process, effectively prevents the crude oil in the oil pipe from being subjected wax precipitation and does not influence the service life of the cable body; on the other hand, the measuring precision of each sensor can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to an oil well alloy superconducting wax and a pressure and temperature measurement device. Background technique [0002] Petroleum is the main energy product in the world today, and oil accounts for a very high proportion of energy consumption in all countries in the world, so oil extraction is very important for every country. In oil extraction, basically all oil-producing countries will encounter the problem of wax deposition in oil pumping equipment. When the oil pumping equipment has a wax deposition failure, it is prone to clogging, which affects the normal and safe production operations of "three high" crude oil extraction, such as difficulty in lifting crude oil, heavy load on the sucker rod, difficulty in descending, and increased load on the pumping unit. Large, difficult crude oil into the pump, etc., which in turn affects the oil recovery efficiency a...

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Problems solved by technology

[0004] At present, the downhole temperature and pressure testing technologies commonly used in oil fields are mainly thermocouple and optical fiber testing technologies for downhole temperature dynamic monitoring, capillary tube testing technology for downhole pressure dynamic monitoring, and electronic pressure gauge testing technology for downhole single point pressure and temperature dynamic monitoring. And it cannot realize long-term dynamic monitoring of multi-point temperature under high temperature conditions. By combining thermocouple bundles, cables and downhole temperature and pressure testers to make a downhole pressure and multi-point temperature combined testing device, it is lowered into oil wells to obtain downhole single point pressure. and multi-point temperature test data, but there is no corresponding special cable for data transmission, resulting in complex structure, difficult underground installation, time-consuming and labor-intensive; in addition, the use of thermocouple cables requires cold junction compensation, and ordinary copper wires cannot be used with them When integrated in a dedicated cable, it is susceptible to mutual signal interference, resulting in low measurement accuracy and making the structure of the dedicated cable more complicated

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