PDC切削齿切削深度对PDC钻头黏滑振动影响动态实验  

Dynamic experimental on the influence of cutting depth of PDC cutter on stick-slip oscillation of PDC bit

作　　者：石李保 邹德永[1] 王皓琰[1] 汪威 宋洵成 SHI Libao;ZOU Deyong;WANG Haoyan;WANG Wei;SONG Xuncheng(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China)

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中国石油勘探开发研究院

出　　处：《石油钻采工艺》2021年第6期750-755,790,共7页Oil Drilling & Production Technology

基　　金：中国石油勘探开发研究院科研项目“钻柱系统黏滑振动机理与钻头自适应限位齿控制单元研究”(编号:2017ycq13)。

摘　　要：通过室内动态破岩实验,研究切削齿切削深度及岩石可钻性对PDC钻头黏滑振动的影响。选取了红砂岩、黄砂岩、白砂岩和花岗岩4种不同岩性、400 mm×400 mm×400 mm的天然岩石作为实验岩样,通过改变钻压,分析切削齿切削深度、岩石可钻性与钻头黏滑振动的关系。选取扭矩和转速波动作为黏滑振动特征参数来描述PDC钻头黏滑振动现象,对其进行无因次化处理,定义为黏滑严重度,并分别建立了PDC钻头黏滑严重度、扭矩振幅,与平均每转切削深度和岩石可钻性的二元非线性关系模型。实验结果表明:实验室条件下扭矩黏滑严重度差异性更加明显;实验的5种钻压下,扭矩黏滑严重度均随岩样可钻性级值的增加而显著增加;PDC钻头每转切削深度增加,扭矩黏滑严重度显著增加。The influences of cutter cutting depth and rock drillability on the stick-slip oscillation of PDC bit were researched by means of laboratory dynamic rock breaking experiment.400 mm×400 mm×400 mm natural red sandstone,yellow sandstone,white sandstone and granite were selected as experimental samples and the relationships of cutter cutting depth and rock drillability vs.stick-slip oscillation of PDC bit were analyzed by changing the weight on bit(WOB).Torque and rate of penetration(ROP)fluctuation were taken as the characteristic parameters of stick-slip oscillation to describe the stick-slip oscillation phenomenon of PDC bit,which were treated to be dimensionless and defined as the stick-slip severity.In addition,the binary nonlinear relationship model of stick-slip oscillation and torque amplitude of PDC bit vs.average cutting depth per revolution and rock drillability was established.It is experimentally indicated that the stick-slip severity of torque is more obvious under the experimental conditions.Under the five experimental WOB,the stick-slip severity of torque increases greatly with the increase of rock drillability grade value.What’s more,the stick-slip severity of torque increases greatly as the cutting depth per revolution of PDC bit increases.

关 键 词：黏滑振动 PDC钻头 切削深度 黏滑严重度 

分 类 号：TE921.1[石油与天然气工程—石油机械设备]