套管伸缩器及定位钢管桩在滨海浮船平台绳索取心钻进中的应用

随着探矿领域不断扩展,滨海探矿项目越来越多。在滨海水上钻探中,由于受海浪、涨落潮、暗流、大风等不稳定因素影响,存在钻具横向、竖向定位控制困难等问题。采用＂浮船＋钢管桩＋伸缩器套管＂工法能较好地解决这2个难题。结合工程实践,介绍了套管伸缩器及定位钢管桩在滨海绳索取心钻探中的组合应用。

Application of Sleeve Expansion Joint and Positioning Steel Pipe Pile in Wire-line Core Drilling at Coastal Pontoon Platform

In coastal prospecting drilling,the positioning control is difficult in both horizontal and vertical orientation because of the waves,tide,currents,winds and other factors of instability,which can be solved by pontoon platform ＋ steel pipe pile ＋ sleeve expansion joint method. The paper introduces the compound application of sleeve expansion joint and positioning steel pipe pile in coastal wire-line core drilling by the engineering practice.