摘要
针对钻进过程中钻头位置扭矩波动大、钻压传递效率低等问题,设计了一种恒扭提速钻具,并展开钻井动力学特性研究与现场试验分析。基于恒扭提速钻具结构,建立了恒扭提速钻具动力学建模模型,根据实际钻井参数进行数值计算,研究不同上部输入转速、弹簧系统初始压缩量以及钻柱长度对钻头振动特性的影响,并通过现场试验,验证恒扭提速钻具的提速效果以及钻头磨损情况。研究结果表明,随着初始压缩量和上部输入转速增加,钻头在下移过程中,轴向速度的峰值逐渐增加;当钻柱长度逐渐增加,钻头轴向速度稳定响应时间增加,持续时间缩短,脱离粘滑区域响应时间延长;使用恒扭提速钻具,可以有效改善钻头受力,减少钻头粘滑,可有效提高钻井效率和钻头使用寿命。文章研究成果可以为恒扭提速钻具特性研究、结构优化与现场应用提供理论指导。
Aiming at the problems of obvious torque fluctuation at drill bit and low weight-on-bit(WOB)transmission efficiency during the drilling process,a constant torque speed-up drilling tool is proposed,and drilling dynamics characteristics and field trials are studied.Based on the constant torque speed-up drilling tool,the force analysis of drilling string system is conducted and the drilling dynamics theory model is established.Numerical calculation is carried out according to the actual drilling parameters.And the impacts of the input velocity of the upper drill string,the initial compression of the spring system and the length of drilling string on the vibration characteristics of drill bit are studied.Through the field experiment,the speed-up effect of the constant torque speed-up drilling tool and the bit wear are verified.The research results show that as the initial compression and the upper input velocity increase,the peak value of the axial velocity gradually increases during the downward movement of drill bit.When the length of drilling string gradually increases,the steady response time of the axial velocity of drill bit increases,the duration time shortens,and the breakaway response time in the stick-slip area is prolonged.The use of constant torque speed-up drilling tool can effectively improve the dynamic conditions of drill bit,and reduce the stick-slip of drill bit,which can effectively improve drilling efficiency and service life of drill bit.The research results can provide reference for studying the working characteristics of the constant torque speed-up drilling tool,and also provide theoretical guidance for the structural optimization and field application of this drilling tool.
作者
田家林
唐磊
刘强
肖新启
杨应林
TIAN Jialin;TANG Lei;LIU Qiang;XIAO Xinqi;YANG Yinglin(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;KINGDREAM Petroleum Machinery Co.,Ltd.,Sinopec,Wuhan,Hubei 430223,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2022年第4期203-212,共10页
China Offshore Oil and Gas
基金
国家自然科学基金“深海输流大变形立管流致振动及疲劳损伤研究(编号:51674216)”
“十三五”国家科技重大专项“大型油气田及煤层气开发(编号:2016ZX05038)”
高端外国专家引进计划“非常规油气开采条件下基于多目标优化的非线性动力学应用研究(编号:SYZ201985)”部分研究成果。
关键词
动力学
钻井
粘滑
振动
扭矩
提速
dynamics
drilling
stick-slip
vibration
torque
speed increase
