水压内割刀及扶正器在海域钻探孔内事故处理中的应用研究

Application research of hydraulic internal cutter and centralizer in down-hole accident treatment for offshore drilling

摘要:

海洋地质十七号钻探船在海域CPT静探施工作业过程中，由于钻杆长时间在孔内停留孔壁发生失稳坍塌，起钻时遭遇卡钻、埋钻等问题。结合此次事故处理中所采用的设备与技术方法存在的问题，针对扶正器与水压内割刀组合装置的应用开展了应用研究，详细阐述其内部构造和工作原理，以及在试验应用中的经验。其经验可为处置此类事故提供借鉴。

Abstract:

During the CPT static borehole testing operations conducted by the Ocean Geological Survey No.17 drilling vessel in the offshore area， long-term retention of drill pipes in the borehole caused borehole wall instability and collapse， resulting in issues such as pipe sticking and pipe burial during tripping out. Based on the equipment and technical methods employed in this engineering case study， this paper conducts an applied research on the combined application of centralizer and hydraulic internal cutter， provides a detailed exposition of the internal structure and operating principle， as well as practical experience gained in handling borehole-related incidents， which can serve as valuable references for addressing similar accidents.