Improving drill pipe durability by wear-resistant surfacing

Abstract

Improving the efficiency of drilling oil and gas wells is impossible without increasing the durability of the drill pipe. The main reason for drill pipe tool joints to wear in the open hole is the presence of a hard layer in aggressive geological formations and wear due to friction with the inner wall of the casing. One of the effective methods for increasing the wear resistance of drill pipes is surfacing of the drill joint of the drill pipe with cored wire (hardbanding). Leading oil and gas companies, as well as specialized companies for drilling wells, widely use surfacing materials of various grades. To assess the quality of drill pipe tool joint surfacing, in accordance with the recommendations of the American Petroleum Institute (USA), two test tests were determined: ASTM G65 abrasion resistance degree and Casing Wear Test. Studies conducted to increase the wear resistance of drill pipe tool joints and casing with wear-resistant surfacing material DRM-150 (China) applied to the material in relation to the production tool joints material testify to the efficiency of surfacing. The results of metallographic studies indicate the formation in the deposited layer of gradient layers of metal with high hardness on the surface of 650 HV0.1 to a depth of 3.2 mm, a transition zone of hardness 350 HV0.1 and the starting metal 300 HV0.1. The wear resistance of the DRM-150 surfacing is almost three times higher compared to the wear of the material without surfacing (ASTM G65 test) and more than 5 times higher than the wear resistance of the initial samples without surfacing (Casing Wear Test).