AISI4137, AISI4145H is a high strength,casing and tubing couplings  high stiffness, torsional wear special alloy steel, mainly used in manufacturing 1000-3000 m depth underground oil drill collars, need to have to withstand all kinds of rock drilling friction conditions, a variety of stress its effect on operations and other harsh environments, and oil exploration in a larger amount of mining equipment, high-tech high value-added products, with broad market prospects.
To meet the drill collar steel high purity, high strength and toughness, good hardenability other performance requirements, steel plant from the process discussed in the various departments, production preparation, control scheme, annealing details and other aspects of well prepared. Technical managers trial production tracking, convergence and process control process quality control from the strict control of production organization Downhole Drilling Stabilizers to ensure that the series of steel-time successful trial.
Successful trial of this drill collar steel for the subsequent development of high value-added products has accumulated valuable experience, but also created the conditions for further broadening of sophisticated products market space, enhance the competitiveness of enterprises.