ORCHID ENERGY Co., Ltd

The drill collar is manufactured using alloy structure steel forged or finely rolled by AISI 4145H. The drill collar is processed according to API SPEC 7-1 standards. Heat treatment is carried out over the full length of the product to ensure that its mechanical properties meet API SPEC 7-1 standard requirements, its Breitis hardness range is between 285-341, and sampling at 20 degrees C±5 degrees C, less than 1 inch from the surface of the tube body can ensure that its Xiabi V-type notch impact force of 40 ft-lb. Non-magnetic drill collar is made of a low-carbon high-chromium manganese alloy steel, it is refined after a strict chemical distribution ratio and forged to achieve its mechanical properties, with good low magnetic conductivity, high-strength mechanical properties, excellent intercrystalline corrosion-resistant cracking performance and excellent wear resistance. 　 When the magnetic field strength is 1×105/4 x A/m, the relative magnetic conductivity of the non-magnetic drill collar is 1.010 ≤ 1.010. The magnetic strength gradient of 100mm along any hole along the inner hole is ≤0.05μT.