国内常规海洋地质钻探取心技术进展

为实现在海洋地质钻探中高效、便捷地采获海底各类地层样品,设计研发了绳索取心泥浆静压活塞取心钻具、海洋砂质地层绳索取心钻具和液动冲击绳索取心钻具,并在南海进行了钻探试验和作业。结果表明,泥浆静压活塞取心钻具能有效减少样品扰动,原始结构较为完整,海洋砂质地层绳索取心钻具和液动冲击绳索取心钻具在粉砂层、砂层中的岩心采取率高于规范要求,能够满足作业需求。

Progress in domestic conventional marine geological coring technology

In order to achieve efficient and convenient acquisition of various submarine formation samples in marine geological drilling,mud static pressure piston wireline coring tools,marine sand wireline coring tools and hydraulic percussion wireline coring tools were designed,and tested in the South China Sea.The test results showed that the mud static pressure piston wireline coring tools can effectively reduce disturbance of the sample with the in?situ structure relatively maintained.The marine sand coring tools and the hydraulic percussive coring tools had higher recovery in the silt and sand layers,which was better than the specification and can meet the drilling requirements.