CAJ | 학술논문

新疆玉北地区古生界沙井子组地层埋深4000 m以上，岩石强度高；加之泥质岩含量高、塑性强，地层可钻性较差，提速困难。前期实践表明，沙井子组高塑性地层牙轮钻头的纵向冲击压碎破岩效果不佳，常规PDC钻头钻井反扭矩大，易产生“黏滑”现象，破岩效率低。为提高机械钻速，降低钻井综合成本，引入了国外的新型钻井提速工具--TorkBuster扭力冲击器，并通过匹配个性化PDC钻头、提高钻井液排量、合理控制钻压等配套技术措施，大幅度地提高了平均机械钻速。“PDC钻头+螺杆钻具”、“孕镶PDC石钻头+涡轮钻具”和“PDC钻头+扭力冲击器”3种钻井工艺的现场试验结果表明，扭力冲击器提速效果明显，平均机械钻速为6.42 m/h，与前期相比机械钻速提高了2~3倍。扭力冲击器钻井克服了深井高强度塑性地层的钻井难题，可进一步推广应用。
신강옥북지구고생계사정자조지층매심4000 m이상，암석강도고；가지니질암함량고、소성강，지층가찬성교차，제속곤난。전기실천표명，사정자조고소성지층아륜찬두적종향충격압쇄파암효과불가，상규PDC찬두찬정반뉴구대，역산생“점활”현상，파암효솔저。위제고궤계찬속，강저찬정종합성본，인입료국외적신형찬정제속공구--TorkBuster뉴력충격기，병통과필배개성화PDC찬두、제고찬정액배량、합리공제찬압등배투기술조시，대폭도지제고료평균궤계찬속。“PDC찬두+라간찬구”、“잉양PDC석찬두+와륜찬구”화“PDC찬두+뉴력충격기”3충찬정공예적현장시험결과표명，뉴력충격기제속효과명현，평균궤계찬속위6.42 m/h，여전기상비궤계찬속제고료2~3배。뉴력충격기찬정극복료심정고강도소성지층적찬정난제，가진일보추엄응용。
Due to the great burying depth, larger than 4000m, and hard Shajingzi formation with strong abrasiveness and poor drill-ability in Yubei area of Xinjiang Province, it is hard to speed up drilling operation, Previous practice shows that the cone bits have a poor impact on the Shajingzi formation and the conventional PDC bit has high anti-torque, so it is easy to produce“stick-slip”phenomenon. Finally, the rock breaking is inefifcient. In order to improve the penetration rate and reduce the cost, TorkBuster torsion impact generator with a personalized PDC bit is recommended. The three drilling technologies,"PDC bit+screw drill tool","diamond bit+turbine tool"and"torsion impact generator+PDC bit”, are discussed in the paper. The results show that torsion impact generator is more effective than other drilling technologies, with the average rate up to 6.42m/h, 200%-300%higher than earlier stage. The torsion impact generator overcomes the deep drilling problems in the high-strength plastic formations. It should be widely applied.