特深孔地质岩心钻探钻孔口径及管柱规格研究

Research on hole diameter, drill string specification and casing program for ultra-deep geological core drilling

摘要:

针对5000 m地质岩心钻探基础准则与依据缺失，油气钻井与岩心钻探工艺及装备差异大等问题，本文梳理分析了国内外深部地质岩心钻探口径系列及管柱规格，厘定了基本外界条件及相互关联要求，开展了特深孔岩心钻探环空水力学计算与绳索取心钻杆的等强度设计，初步构建了以绳索取心钻进工艺为主体的5000 m特深孔钻探口径系列与钻（套）管柱规格。

Abstract:

In view of some issues such as the lack of basic criteria and basis for 5000m geological core drilling, the great difference between oil and gas drilling and core drilling in drilling technology and equipment, this paper summarizes and systematically analyses the diameter size and tubing string specifications in deep geological core drilling at home and abroad. On this basis， basic external conditions and interrelated requirements are defined with calculation of annular hydraulics and design of the wire-line drill string strength for ultra-deep hole core drilling. The diameter size, drill string and casing string specification for 5000m ultra-deep hole drilling are preliminarily set up with the wire-line drilling process as the main part.