A titanium alloy drill pipe joint wear-resistant band welding structure and method

Abstract

A titanium alloy drill pipe joint wear-resistant belt welding structure and method, the welding structure includes an intermediate medium layer covering the titanium alloy drill pipe joint body, and the intermediate medium layer is melted on the titanium alloy drill pipe joint body after high temperature A dense protective layer is formed on the surface, and a wear-resistant material layer is welded on the dense protective layer to form a wear-resistant belt. The material of the intermediate medium layer melts with the titanium alloy of the drill pipe joint at high temperature to form a dense protective layer. The dense protective layer not only has a strong bonding force with the body of the titanium alloy drill pipe joint, but also can be combined with the existing steel The wear-resistant band material of the drill pipe joint is effectively fused, and the wear-resistant material layer has sufficient hardness and thickness, and has excellent wear resistance. The invention realizes adding a wear-resistant material layer on the surface of the titanium alloy drill pipe joint, avoids the wear failure problem of the titanium alloy drill pipe joint caused by friction and wear, improves the service life of the titanium alloy drill pipe joint, and thus improves the durability of the titanium alloy drill pipe cost-effective.

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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