LEM-4100润滑性评价装置及其应用  

DEVELOPMENT AND APPLICATION OF LEM-4100 LUBRICITY EVALUATION UNIT

作　　者：夏小春[1] 胡进军[1] 耿铁[1] 项涛[1] 

机构地区：[1]中海油田服务股份有限公司油田化学研究院

出　　处：《钻采工艺》2016年第2期35-38,2,共4页Drilling & Production Technology

基　　金：中国海洋石油总公司项目"AUQAMAX高性能水基钻井液的研制"(项目编号:CNOOC-KJ 125 ZDXM 12 LTD 00 YF 2012-01)部分研究内容

摘　　要：为了模拟评价油田钻井过程钻柱-套管和钻柱-岩石间摩擦阻力,采用润滑评价模拟装置LEM-4100,开发了润滑模拟评价法（LEM法）,最优测试条件为：循环泵流量为5 000 m L/min,外部接触力ECF为222-423 N左右（气缸压力为69-110 k Pa）,转速为90 r/min。采用LEM法分别测试了加入润滑剂Green Lube和润滑剂LUBE的钻井液中金属-金属和金属-滤饼摩擦系数,实验结果表明,Green Lube能有效的降低金属-金属和金属-滤饼摩擦系数;而LUBE的加量自1%增加至3%时,金属-金属摩擦系数先增大后降低,金属-滤饼摩擦系数几乎没有变化。金属-金属和金属-滤饼摩擦实验对比结果表明,与金属-金属摩擦相比,金属-滤饼间摩擦对于总的摩擦的贡献较大,应该在钻井液中添加能有效地降低金属滤饼间摩擦阻力的润滑剂,以降低钻井过程中钻柱的扭矩。To monitor the friction between drilling pipe and casing or rock,a lubricity evaluation monitor( LEM) method was developed by using lubricity evaluation monitor apparatus—LEM- 4100. The optimal flow speed of recirculation pump was5000 ml / min,the external contact force was about 50 ~ 95lbsf( air pressure of air cylinder was 10 ~ 16psi),and the rotation speed was 90 rpm. The friction coefficient of metal- on- metal and metal- on- cake in drilling fluids with lubricants GreenLube and LUBE was measured separately by LEM method. Laboratory test results showed that GreenL ube could efficiently decrease the friction coefficient of metal- on- metal and metal-on- cake. With the increasing quantity of LUBE from 1% to3%,the friction coefficient of metal- on- metal increased first and then decreased,but the friction coefficient of metal- on-cake was almost unchanged. Comparison experiments of metal-on- metal friction and metal- on- cake friction showed that the contribution of the metal- on- cake friction to total friction was larger than the metal- on- metal friction. Lubricants which can efficiently reduce the friction of metal- on- cake should be added in drilling fluids to reduce torque of drilling pipe in the process of drilling.

关 键 词：钻井液 润滑性 模拟 评价 应用 

分 类 号：TE254[石油与天然气工程—油气井工程]