连续油管钻进减阻提速技术

Increasing Drilling Rate and Drag Reduction in Coiled Tubing Drilling

随着小井眼连续油管应用越来学广泛,连续油管强度更小,所以在连续油管钻进时,更容易产生屈曲,而且连续油管不旋转,从而产生比常规钻井更大的摩擦阻力。特别是在钻水平井和定向井时,这种阻力会严重影响水平段长度,影响钻压的施加,更严重的会导致下钻下不到井底。减小这种阻力的常规方法有改良钻井液、优化井眼轨迹、提高洗井效率,加强固相控制、优化钻具组合,此外,最新的方法有,使用油基泥浆钻井液和使用最新的钻井设备,我们现在对新的方法进行研究。

As slim-hole coiled tubing application is more and more wide, the intensity of coiled tubing is smaller, so when the coiled tubing drilling, the buckling happens easy; and coiled tubing cannot rotate, which will result in greater conventional drilling fi＇iction resistance. Especially in the drilling of horizontal wells and directional well, the resistance will seriously affect the horizontal section length, exerting job, and downhole drill down. Conventional methods to minimize this resistance is to improve drilling fluid, optimize borehole trajectory, improve the efficiency of washing well, strengthen the solid phase control, optimize the assembly, in addition, the new method is to use oil-base mud drilling fluid and new drilling equipments.