Tubing hanging ring detection device based on lengthened coupling

Abstract

The oil pipe internal corrosion hanging ring detection device based on the extension coupling, including the oil pipe extension coupling, the middle part of the oil pipe extension coupling is an unthreaded pipe section; the bottom of the unthreaded pipe section is provided with a ring platform; the unthreaded pipe section is sleeved with a hanging ring sleeve There are at least 3 inner hanging rings on the hanging ring sleeve; a spacer ring is sleeved between the inner hanging rings; a hanging ring cover ring is respectively sleeved on the outer sides of the inner hanging rings at the upper and lower ends of the sleeve; the hanging ring sleeve The barrel is stuck on the ring table; put the combined hanging ring sleeve into the unthreaded pipe section of the oil pipe extension coupling, the hanging ring sleeve is stuck on the ring table, and the internal corrosion of the oil pipe can be eliminated by removing the inner hanging ring regularly It can detect the whole well section, and has the characteristics of simple structure, convenient installation and comprehensive detection.

Description

technical field [0001] The invention belongs to the technical field of oil well pipe string corrosion detection, and in particular relates to a detection device for hanging rings in oil pipes based on extended couplings. Background technique [0002] The tubing string is lowered into the production casing string to form a channel between the downhole oil and gas layer and the ground, and control the flow of crude oil and natural gas. After most oil wells are put into production, with the extension of production time, the water content of crude oil gradually increases, and the corrosive environment becomes more harsh, resulting in thinning of the tubing wall thickness, resulting in a decrease in the tensile strength of the tubing, and in severe cases, the tubing will be perforated or even broken , bringing production difficulties and safety hazards to oil recovery. At present, some of the hanging rings used in the detection of internal corrosion of the tubing are installed a...

AI Technical Summary

Problems solved by technology

After most oil wells are put into production, with the extension of production time, the water content of crude oil gradually increases, and the corrosive environment becomes more harsh, resulting in thinning of the tubing wall thickness, resulting in a decrease in the tensile strength of the tubing, and in severe cases, the tubing will be perforated or even broken , bringing production difficulties and safety hazards to oil production

At present, some of the hanging rings used in the detection of internal corrosion of the tubing are installed at the female plug position at the lower part of the tubing string. However, since the pressure and temperature in the tubing are gradually lower from the reservoir to the wellhead, and the corrosion conditions of the inner wall of the tubing are not the same, this method cannot Detect the internal corrosion of tubing in the entire well section; some tests use an annular groove inside the tubing and an inner steel ring in the annular groove for detection. The disadvantage of this method is that the strength of the tubing will be reduced accordingly; On the premise of reducing the connection strength of the tubing string, the inner and outer diameters of the tubing short are enlarged to facilitate the processing and installation of the inner hanging ring, so as to meet the diameter requirements of the entire tubing string. However, the design and processing are relatively complicated, and the specification of the tubing short is difficult Match specific tubing strings (short connection specifications need to be customized)

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