Along with the oil prospecting and production, the existent drilling bit (steel and tungstencarbidetooth bit) was not effective in some complicated stratum.
随着油气勘探开发的不断深入,现有牙轮(钢齿、镶齿)钻头已难以对一些复杂地层进行有效的钻进。
2
A method to improve the tooth shape of mill roller and adopt the built - up-welding with tungstencarbide on the curved surface of tooth apex has been introduced.