提高绳索取心钻进效率的有效途径

提高绳索取心钻进效率要做到:一是根据孔深、钻孔孔径、钻孔所遇地层及其岩性的完整程度、构造特点、风化带发育深度等选择套管的直径及下入深度;二是采取措施克服轴向压力预防孔斜;三是根据钻遇岩石的可钻性级别选择钻头,按照一定顺序依次使用,并合理控制时效及提钻间隔;四是根据地层特点,钻孔深度,施工要求选择合适的钻井液技术参数;五是根据钻井过程中遇到的特殊现象及钻井液漏失程度判别漏失类型,并采用合理的堵漏方法,实现安全钻进;六是定期检查钻具,更换破损、变形部件,作好维修保养工作。

The Efficient Path to Raise Wire-Line Drilling Efficiency

To raise wire-line drilling efficiency need to: 1.Select casing diameter and depth according to drilling depth,diameter,strata drilled and rock integrity,structure features,weathered layer depth;2.Take measures to bear down axial pressure to prevent bore-hole deviation;3.Select drill bit according to the drillability of rock,and use them in turn in conformity to certain sequences,rationally control hourly efficiency and hoisting interval;4.Select suitable drilling fluid specifications according to strata characteristics,drilling depth,operation requirements;5.Distinguish leakage nature according to special phenomena during drilling and leakage extent,and use rational method to stop and ensure drilling safety;6.Check drill tools at fixed periods,change damaged and deformed parts,get done with maintenances.