海底沉积地层保真取样钻具的设计及应用

钻探取样技术作为海洋地质调查和资源勘探的主要方法,在海洋探索领域占据着十分重要的地位。海底地层以松软沉积物为主,常规钻探回转取样的方法极易破坏样品原状性,且样品采取率低,难以满足科学研究的要求。研制了一种以泥浆泵压驱动的沉积物保真取样钻具,并结合绳索取心技术,实现海底沉积地层保真取样。试验证明,该海底沉积地层保真取样钻具取样成功率高、作业效率高,所采取样品原位性、原状性好,完全满足海洋地质和土工实验等对样品的严格要求。

Design of Drilling Tool for Truth-preserving Sampling in Submarine Sedimentary Strata and the Application

As a main method of marine geological survey and resource exploration, drilling sampling techniques occupy a very important position in the field of ocean exploration. Seabed strata is mainly of soft-sediment, the conventional drilling with rotary sampling would easily damage the original status of samples with low sampling rate, so it is difficult to meet the requirements of scientific research. A mud pump pressure driven truth-preserving sediment sampling drilling tool was developed with wire-line coring technology to achieve truth-preserving sampling in submarine sedimentary strata. The test proves that the sediment sampling truth-preserving drilling tool can meet the strict requirements to the samples for marine geological and geotechnical experiments with high success rate, high operating efficiency, samples in situ and good original states.