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由西南石油学院与成都石油总机械厂合作研制的新型钻井工具φ215.9mm 527(N)型三牙轮钻头于1993年5月24日在成都通过了由中国石油物资装备总公司组织的部级技术鉴定。φ215.9mm-527(N)型三牙轮钻头即φ215.9mmXHP_2S(N)型钻头,适用于钻凿低抗压强度、低硬度的岩层,如页岩、粘土、软石灰岩、膏盐等。该型钻头经三年多的研究和改进,并通过井下试验,获得良好效果。试验钻头分别在长庆、新疆、四川油气田进行现场钻探,其主要钻进指标已达到合同要求,平均进尺511.13m,平均
The new drilling tool φ215.9mm 527 (N) type tricone bit developed by the Southwest Petroleum Institute and Chengdu Petroleum Machinery Factory passed the ministerial level organized by China Petroleum Materials and Equipment General Corporation on May 24, 1993 in Chengdu, Technical appraisal φ215.9mm-527 (N) tricone bit that is φ215.9mmXHP_2S (N) bit, suitable for drilling low compressive strength, low hardness rock, such as shale, clay, soft limestone, gypsum salt. The drill bit after three years of research and improvement, and through the underground test, get good results. The test drills were drilled on-site in Changqing, Xinjiang and Sichuan oil and gas fields, respectively, and their main drilling targets had reached the contractual requirements with an average footage of 511.13m, with an average of