Abstract: Aiming at the excessive friction and torque problems appeared in horizontal wells in A oilfield, a new high-performance lubricant CRH-1 is developed by environmental base oil and lubrication modifier. Experimental results show that CRH-1 exhibits good stability, good low temperature fluidity and low foaming rate. The lubrication coefficient of bentonite slurry was ever reduced by 85% when 0. 5% wt lubricant CRH-1 contained, the working temperature up to 150℃ , lubrication performance better than conventional lubricants, and compatible with drilling fluids. Lubricant CRH-1 was successfully used in the horizontal parts of two wells in southern block in A oilfield. The results show that lubrication performance of field drilling fluid improved obviously, pipe stuck and back pressure problems effectively avoided, much less lubricant CRH-1 used, and the purpose of reducing costs and increasing efficiency been achieved.

Key words:  , lubricant, friction and torque, lubrication performance, water-based drilling fluid, A oilfield 

摘要：  针对 Ａ油田部分区块水平井钻井过程中常出现的摩阻扭矩过大、托压严重等问题，室内通过优选环 保型基础油和润滑添加剂，制备出了一种高效钻井液润滑剂CRH-1。室内评价结果表明，润滑剂CRH-1稳定性较好，低温流动性良好，起泡率低；在5％膨润土浆中加量为0.5％时，实验浆的润滑系数降低率即可达到 ８５％以 上，可抗温 150℃，润滑性能优于常用钻井液润滑剂，且与钻井液的配伍性良好。润滑剂CRH-1在A油田南部 2口井的水平段成功进行了现场试验，CRH-1的加入显著改善了钻井液的润滑性能，同时有效避免了卡钻、托压等复杂情况，润滑剂使用量大幅减少，有效实现了降本增效的目的。

关键词:   润滑剂, 摩阻扭矩, 润滑性能, 水基钻井液, A 油田