天然气勘探与开发2026，Vol.49Issue(3)：123-132,10.DOI:10.12055/gaskk.issn.1673-3177.2026.03.012
重载超高温超高压尾管固井工具的研制与应用
Development and application of heavy-load ultra-high temperature ultra-high pressure liner cementing tools:A case study of Well SDTK1
摘要
Abstract
Well SDTK1 is China's first myriametre scientific exploration well.There exists extreme downhole conditions,including ultra-deep,ultra-high temperature,ultra-high pressure,and ultra-heavy load,in its drilling and completion.Moreover,it faces technical challenges caused by long open holes of the fourth and fifth spud sections,such as premature circulation and multiple circulation operations during liner running,which are highly likely to induce cementing failure.To address these challenges,based on the technical concept of"smooth RIH,firm setting,free release,tight sealing,reliable isolation,and effective POOH",the structural integrity and sealing reliability of key cementing tools(e.g.liner hanger,float collar,float shoe,and drill pipe plug)were systematically analyzed,and a set of heavy-load,ultra-high temperature and ultra-high pressure liner cementing technologies were developed.The following results are obtained.(i)The liner hanger is structurally reinforced,achieving"smooth RIH".(ii)A two-stage independent fluid-actuated setting mechanism is adopted to realize the hanger setting function,achieving"firm setting".(iii)The single-start high-pitch release mechanism and a new type of engaged accompanying sand prevention shield are adopted to enable the drilling tools to run out immediately after cementing,achieving"free release".(iv)High-reliability sealing float collar and float shoe are employed to ensure the reliable sealing of non-return valves,achieving"tight sealing".(v)Drill pipe plug is structurally optimized with optimal materials,achieving"reliable isolation".(vi)A"bare-type"central tube is used,achieving"effective POOH".It is concluded that the technologies effectively address the cementing challenges under extreme downhole conditions of ultra-deep,ultra-high temperature,ultra-high pressure,and ultra-heavy load,and have achieved good application results in the fourth and fifth spud sections of Well SDTK1.They provide technical support for the oil and gas development in ultra-deep wells in China and promote the iterative upgrading of domestic cementing tools.关键词
SDTK1井/超深井/超深、超高温、超高压、超重载/尾管固井技术/尾管悬挂器/坐挂功能/固井成功率Key words
Well SDTK1/Ultra-deep well/Ultra-deep,ultra-high temperature,ultra-high pressure,and ultra-heavy load/Liner cementing technology/Liner hanger/Setting function/Cementing success rate分类
能源科技引用本文复制引用
赵常青,刘勇,贾彪,邹祥富,肖勇,刘金磊..重载超高温超高压尾管固井工具的研制与应用[J].天然气勘探与开发,2026,49(3):123-132,10.基金项目
中国石油天然气集团有限公司重大技术攻关项目"万米超深井钻探关键工程与技术装备"(编号:2022ZZ20). （编号:2022ZZ20）
