Cylinder sleeve for oil exploitation and preparation method of cylinder sleeve

Abstract

The invention discloses a cylinder sleeve for oil exploitation. The cylinder sleeve comprises an outer sleeve and an inner sleeve. The inner sleeve is nested in the outer sleeve. The two ends of the inner sleeve are provided with a first annular sleeve and a second annular sleeve correspondingly. The first annular sleeve, the second annular sleeve and the inner sleeve are of an integrally formed integrated structure. The two ends of the outer sleeve are provided with a first annular groove and a second annular groove correspondingly. The first annular sleeve is located in the first annular groove. The second annular sleeve is located in the second annular groove. The invention further discloses a preparation method of the cylinder sleeve for oil exploitation. A traditional cylinder sleeve is improved in three respects of structure, material and preparation process, the effect that sleeve falling of the outer sleeve does not occur can be ensured through the improvement in structure, abrasion resistance, corrosion resistance and fatigue resistance of the cylinder sleeve are promoted greatly through the improvements in material and preparation process, and the produced cylinder sleeve is uniform in texture and high in strength.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a cylinder liner for petroleum exploitation and a preparation method thereof. Background technique [0002] The cylinder liner of the oil drilling mud pump is a key component. One end of the cylinder liner is assembled with the mud pump cylinder assembly. The piston rod at the power end is connected to the piston to perform high-pressure axial reciprocating motion inside the cylinder liner to realize the drilling mud. suction and discharge. The traditional cylinder liner is mainly composed of a cylinder inner liner and a cylinder outer liner, such as figure 1 As shown, the axial lengths of the inner cylinder a and the outer cylinder b are consistent, and in the assembled state, the two ends of the inner cylinder a are flush with the two ends of the outer cylinder b. With this structure of the cylinder liner, the fitting end of the cylinder liner is li...

AI Technical Summary

Problems solved by technology

With this structure of the cylinder liner, the fitting end of the cylinder liner is likely to come into contact with the fittings or other hard objects during the installation process, causing the cylinder liner to be bumped. The small contact surface of the inner and outer sleeves leads to the danger of the inner sleeve falling off, which poses a great hidden danger to the operating efficiency of the equipment and the safety of personnel

[0003] In recent years, when drilling under complex geological conditions such as deep wells, hard rock formations, and ocean drilling, the jet drilling technology under the conditions of high pump pressure and large displacement has been vigorously promoted. Fatigue characteristics put forward higher requirements. Traditional cylinder liners can no longer meet the requirements of use, and cylinder liners are prone to early failure, resulting in high drilling costs. The main reasons are insufficient wear resistance, corrosion resistance and fatigue resistance. At the same time, The texture of the cylinder liner is not uniform enough, and there are gaps in the material, which also affects its strength

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