Wear-resistant strip welding structure and method for titanium alloy drill pipe joint

Abstract

The invention relates to a wear-resistant strip welding structure and method for a titanium alloy drill pipe joint. The welding structure comprises an intermediate medium layer covering a titanium alloy drill pipe joint body, the intermediate medium layer forms a compact protecting layer on the surface of the titanium alloy drill pipe joint body by high-temperature melting, and a wear-resistant material layer is welded to the compact protecting layer to form a wear-resistant strip. The material of the intermediate medium layer is melted to the titanium alloy of the drill pipe joint to form thecompact protecting layer, and the compact protecting layer has a very strong binding force to the titanium alloy drill pipe joint body and can be melted with a wear-resistant strip material of an existing steel drill pipe joint. The wear-resistant material is enough in hardness and thickness, so that the wear-resistant material has excellent wear-resistant performance. By adding a wear-resistantmaterial layer on the surface of the titanium alloy drill pipe joint, wear-out failure of the titanium alloy drill pipe joint due to frictional wear is avoided, and the service life of the titanium alloy drill pipe joint is prolonged, so that the cost performance of the titanium alloy drill pipe joint is improved.

Description

technical field [0001] The invention belongs to the field of drill pipes, and in particular relates to a titanium alloy drill pipe joint wear-resistant band welding structure and method. Background technique [0002] The titanium alloy drill pipe used in oil and gas exploration and development has the characteristics of corrosion resistance, low density, high strength and good elasticity. It is used in the development of highly acidic oil and gas reservoirs, as well as the drilling operations of ultra-deep wells and ultra-short horizontal wells. [0003] At the same time, the titanium alloy drill pipe material has strong oxidation resistance and poor wear resistance. The wear-resistant band material of the conventional steel drill pipe cannot be directly fused with the titanium alloy material, and the titanium alloy is a precious metal. The material cost of steel drill pipe is about 25 times that of steel drill pipe, much higher than that of steel drill pipe. Without the pr...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of fixing the titanium alloy drill pipe joint and the wear-resistant band in the above-mentioned prior art, and provide a titanium alloy drill pipe joint wear-resistant band welding structure and method, so that the wear-resistant band layer can be effectively fixed on the On the drill pipe joint, so as to add a layer of wear-resistant material on the surface of the titanium alloy drill pipe joint, avoid the wear failure of the titanium alloy drill pipe joint caused by the wear of the drill pipe joint, and improve the service life of the titanium alloy drill pipe joint. Thereby improving the cost performance of titanium alloy drill pipe

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