摘要
尾管钻井技术属于套管钻井的一种类型,具有降低钻井成本、减少井下事故的优点,尤其对存在井壁坍塌等复杂异常情况的深井具有重要意义。实现了在送入工具与悬挂器之间设计了传扭机构、在送入工具(中心管)内设计了一个以衬套为核心的联动开关、在完钻后尾管固井时使用的实心塞和尾管悬挂器内置的空心塞上设计了"棘爪簧片防退"机构、在尾管悬挂器与技术套管间设计了"橡胶"和"金属"双级密封机构等项技术创新,解决了尾管悬挂器及附件必须具有钻井功能、尾管钻井所配钻头必须满足深井硬地层和低钻压条件的要求、尾管悬挂器必须满足"下得去、挂得准、挂得住、脱得开、封得住、提得出"的技术要求、满足尾管与技术套管的环空密封性能的要求、浮箍可承受钻井过程中的长时间冲蚀且能防止固井后水泥浆倒灌等关键技术,实现了先坐挂、再解脱,最后旋转固井的设计思想,成功地完成了地面模拟试验,顺利地通过了同时具有CMA(中国计量认证)和CNAS(中国合格评定国家认可委员会)资格的检测机构所进行的全面行业性能检测,具备了尾管钻井最大钻深能力达到4500m、尾管长度达到200m的能力。
Liner drilling technology can reduce drilling cost and decrease downhole accidents. The core part of this technology is the liner hanger with the functions of drilling and completion. Liner drilling technology have many technical innovations such as incorporating liner drilling with nitrogen drilling techniques,releasing mechanism, pawl reed back up prevention cementing rubber plug mechanism and two stage metal sealing mechanism. This technology unifies torque transmission while drilling, outer hanging, inter releasing, cementing and outer setting together. They are independent separately and have very high reliability. Liner drilling technology equips relative casings and accessories too. The surface stimulation test and industrial performance detection have been completed successfully.
出处
《钻采工艺》
CAS
北大核心
2010年第1期1-3,122,共3页
Drilling & Production Technology
基金
国家863计划"先进钻井技术与装备"重大项目中"套管钻井技术"课题
关键词
尾管钻井
套管钻井
井壁坍塌
试验
liner drilling,casing drilling,hole collapse,test
