Measures to avoid failure of drill pipe and action of diamond bit

2020-09-01 11:49:27

The basic structure of the drill pipe, the long hole filled with well fluid inside and outside the drill pipe, generally under pressure, bending, torsion, hydraulic transmission and other loads. If the local stress on the drill pipe is less than 206.8 Copernicus per square meter, the drill pipe can be bent at one time without fatigue crack. In the drilling process, the drill pipe is subjected to the complex stress of bending, deformation and tensile stress, especially in the large deflection directional well and gas well geological drill pipe, the fatigue microcrack occurs at the bending frequency of 1 million.

Selection of drill pipe raw materials: In order to combine the analysis of drill pipe stress, the drill pipe body should have high compressive strength, good bending strength characteristics and good fracture toughness of the drill pipe. When using carbon aluminum alloy to make seamless pipe, the rod material should be selected, and aluminum alloy raw materials should be more Cr, MO and other raw materials, in order to improve the compressive strength and fracture toughness of raw materials.

Process selection: At present, the key points in the manufacturing process of drill pipe in China are the total calcined drill pipe (generally called integral drill pipe) and friction welded drill pipe (generally called imitation British drill pipe).

The rigid body of a diamond bit plays a key role in the drilling process. High-quality exploration components cannot be identified according to the bit surface, but the overall visual impact of the bit may show some difficulties. Among them, the rigid body of diamond bit can reflect the product development and production of diamond bit manufacturer. It is a very diamond composite bit, and its rigid body can be said to determine the quality and practical effect of diamond bit.

The role of diamond bit rigid body in drilling process. Due to the late development of bits and pieces in China, only 30 years ago, there are not many important changes in the exploration field.

However, through long-term exploration experience, it is found that the core tube PDC bit diameter does not seem to have the function of repairing drilling equipment. If the rigid material is poor, its wear rate even exceeds that of the core tube, causing great damage to the drilling equipment. The rigid body of diamond composite bit is generally larger than the core tube. The key point is that this kind of bit is common in fractured geological structure and rock drilling.

Linqing Huan Ye Machinery Co., Ltd. is a professional production of geological drill pipe, PDC bit, all kinds of groove drill pipe, three-edge drill pipe and steel composite bit product development and sales enterprises. Source processing plant production and processing, high cost efficiency, low price!