Carbon silica gel high-pressure steel wire braided rubber pipe for oil well

Abstract

A carbon silica gel high-pressure steel wire braided rubber pipe for an oil well comprises an inner rubber pipe body, and the inner rubber pipe body is mainly composed of, by mass, 10-16% of carbon, 42-53% of silica gel, 12-18% of graphite nanoparticles and 22-27% of nitrile rubber. A steel wire woven layer is arranged on the outer side of the inner rubber pipe; a canvas layer is arranged betweenthe steel wire woven layer and the inner rubber pipe; slurry glue is brushed on two sides of the canvas layer; the slurry glue contains an adhesion promoter; the canvas layers and the steel wires woven layers are sequentially made repeatedly into three layers or more; the diameter of each steel wire ranges from 1 mm to 2 mm, the adjacent steel wire woven layers are wound in opposite directions, the spiral angle of winding is about 45 degrees, a sponge layer is arranged outside the steel wire woven layer on the outermost side, the sponge layer is wound and tightened through gauze, a metal abrasion-resistant layer is arranged outside the sponge layer, and the metal abrasion-resistant layer is formed by a corrugated pipe. The rubber pipe can adapt to temperature ranging from dozens of degreesbelow zero to dozens of degrees above zero, and is free of limitation of air temperature seasons, and the service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the technical field of petroleum, and in particular provides a carbon silica gel high-pressure steel wire braided rubber hose for oil wells. Background technique [0002] In the process of workover, high-pressure hoses are often used to transport high-pressure fluid. It is roughly divided into two processes. In the past few years, high-pressure pipes were generally made of ordinary rubber or plastic. Pipes made of plastic materials cannot be bent at will. For pipes that need to be folded and bent at will, rubber materials are generally used, but hoses made of ordinary rubber are generally Wear resistance, strength, and aging resistance are all low, especially in the process of high-pressure transportation. The service life of the hose is relatively short; in recent years, technicians have invented high-pressure steel braided hoses, which are generally installed on the inner or outer layers. , the middle layer uses a steel wire...

AI Technical Summary

Problems solved by technology

It is roughly divided into two processes. In the past few years, high-pressure pipes were generally made of ordinary rubber or plastic. Pipes made of plastic materials cannot be bent at will. For pipes that need to be folded and bent at will, rubber materials are generally used, but hoses made of ordinary rubber are generally Wear resistance, strength, and aging resistance are all low, especially in the process of high-pressure transportation. The service life of the hose is relatively short; in recent years, technicians have invented high-pressure steel braided hoses, which are generally installed on the inner or outer layers. , the middle layer uses a steel wire braided layer to increase the strength, and then set some functional layers in it according to the needs of the function, such as using flame-retardant materials to form a flame-retardant layer, using heat-insulating materials to form a thermal insulation layer, etc., and its various properties are greatly improved. For example, the oil-resistant and flame-retardant high-pressure steel wire braided hose disclosed by the Chinese utility model patent CN204533877U with the publication date of CN206054980U and the publication date of 2017.03.29; the publication date of which is 2015.08.05 has Strong acid resistance, high water temperature resistance, oil resistance, wear resistance and other characteristics

However, the above-mentioned high-pressure steel wire braided rubber hose is limited in terms of climate and temperature. In general, summer construction operations can be carried out normally at temperatures above zero to 30 to 40 degrees. Even cracks, especially in the northern hemisphere in winter, such as cracks in Northeast China, occur more frequently, and the lower the temperature, the more obvious it is

Cracks cause high-pressure hoses to leak and cannot withstand high-pressure fluids, especially at pressures above 15MPa. It not only delays work and time, but also pollutes the environment, and the cost is also high

The main reason for the above problems is that the selection of materials is not correct, and it cannot resist severe cold and low temperature.

For example, in the No. 9 Oil Production Works Team of Daqing Oilfield, a Φ51*4*20 high-pressure steel braided rubber hose with specifications of Φ51*4*20 had 18 bulges in less than three months, which were as big as eggs and as small as walnuts; It molts nearly three meters a month, which seriously affects the production and personal safety, and causes serious economic losses.

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