Temperature and pressure monitoring cable with protection tube and manufacturing method thereof

Abstract

The invention relates to a temperature and pressure monitoring cable with a protection tube. The manufacturing technology of the test and protection tube has the key points that low-carbon alloy steel is selected as long steel materials to improve the twisting strength of a tubular product, the tensile performance and the weldability of the tubular product; underwater low-temperature welding outer protection tubes are adopted in the welding process and are formed and welded into a whole at one time in a manner of being directly embedded into an internal cable, the cable prefabrication is not required so as to prevent the internal cable from being distorted, extruded and collided, therefore the site construction workload is reduced, and the test construction success rate is improved; and the treatment to the positions of all pressure measurement ports is finished under the non-cutting-off condition so as not to affect the strength of the cable and the test and protection tube. The manufacturing technology of the high-strength test and protection tube has novel concept, is reasonable to design and is easy to implement; and by the utilization of the technology, the high-temperature, high-pressure and corrosion resistant high-strength cable protection cable can be manufactured, the site construction workload can be reduced, and the test operation success rate can be improved.

Description

technical field [0001] The invention relates to the technical field of steam injection thermal recovery of heavy oil oilfields, in particular to a special temperature and pressure monitoring cable tested during steam injection thermal recovery of horizontal wells, which is a temperature and pressure monitoring cable externally adopting a continuous protection tube and a manufacturing method thereof. Background technique [0002] Steam Assisted Gravity Drainage (SAGD for short) is a method of injecting steam from a vertical well or a horizontal well above a horizontal production well located near the bottom of the reservoir into the reservoir, and continuously injecting steam underground to heat the reservoir; The heated crude oil and steam condensate are flooded into the surrounding production wells, and the method of recovering crude oil from the horizontal wells at the bottom of the reservoir has high oil recovery capacity, high oil-gas ratio, high ultimate recovery factor ...

AI Technical Summary

Problems solved by technology

Cutting off the coiled tubing and re-welding seriously affects the strength of the coiled tubing, increases the difficulty of construction, and also affects the success rate of the test

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