浮力下管技术在天津东丽CGSD-01地热调查井中的应用

Setting casing with buoyancy in the CGSD-01 geothermal well

CGSD-01井是中国地质调查局部署在天津市东丽区的一口4000 m深的地热调查井,对天津东丽湖地区深层地热资源评价具有重要意义,对成井质量要求较高。中国地质科学院勘探技术研究所结合"4000 m地质岩心钻探成套技术装备"项目成果XD-40型钻机试验,在钻机钩载能力较小的情况下,创新性地采用浮力下管技术完成了该井一开直径339.7 mm深度达1467 m的套管下入作业,为后续施工打下了良好的基础。本文介绍了浮力下管技术的理论分析和实际应用。

The CGSD-01 well,as a 4000m deep geothermal survey well deployed by CGS,is of great significance to the evaluation of deep geothermal resources in Dongli Lake District,Tianjin.The quality requirement on the well completion is high.The Institute of Exploration Techniques,CAGA,while testing of the drill rig XD-40 developed under the research program “4000m Geological Core Drilling Technology and Equipment”,innovatively set the first tier casing of 339.7mm to1467m by use of the buoyancy-assisted casing setting process with the less hook load of the drill rig,laying a good foundation for upcoming drilling operations.This paper introduces the theoretical analysis and practical application of setting casing with buoyancy.