Steel Drifts for casing Aluminium Drifts gauge for drill pipe
Steel Drifts Aluminium Drifts gauge is a thin-walled cylindrical tool to detect the diameter of casing, commonly known as drift gauge. It is composed of joint and cylinder. The lower part of the joint is connected with the cylinder by a thread, and the lower part of the cylinder can be slightly thin. In addition, the upper and lower ends of the cylinder can be processed with connecting threads, which is convenient for connecting the two drift diameter gauges when the working tool in the well is long. The cylinder of the other type of drift diameter gauge is inclined guide body with hollow ends, which is mostly used for drifting in highly deviated wells or horizontal wells. The purpose of machining the lower part of the cylinder into a thin wall is: when the inner diameter of the deformation part of the casing is less than the outer diameter of the drift diameter gauge, the cylinder is easy to deform, and the deformation condition of the casing can be roughly understood through the deformation; It can buffer the impact force, and is not easy to jam the drift, so it is easy to pull out the drill string.
