摘要
传统的垂直钻井设备控制策略中,由于液压分系统的限制,一般采用六位置控制策略,所以设备的控制合力指向角不能准确指向高边方向,控制精度难以满足需求,易造成井眼轨迹螺旋化。为了克服六位置控制方式的不足,在液压分系统输出压力可控条件下,提出了一种矢量控制方法;通过矢量分解得出每个液压分系统需要输出的分力,保证液压机构输出的合力精确指向高边方向,并讨论了在液压分系统输出能力有限时合力指向的精度误差。此方法克服了六位置控制算法不能精确导向的缺点;井下试验验证了控制算法的可行性和工作可靠性。
The ＇ six-position＇ control strategy is adapted in the traditional vertical drilling system due to the limitation of the hydraulic subsystem. Therefore, the resultant force pointing angle of the equipment can not accurately point to the high-side direction, and the control precision is difficult to meet the demand. In order to overcome the shortcomings of the six-position control method, a vector control method is proposed under which the output pressure of the hydraulic subsystem is controllable. The output force of each hydraulic subsystem can be calculated by vector decomposition to ensure that the resultant force of the hydraulic mechanism is directed to the high-side direction precise- ly. The error of the resultant force of the hydraulic sub-system is discussed when the output capacity of the hydraulic sub-system is limited. This method overcomes the shortcomings of the six-position control algorithm which cannot be precisely guided. The feasibility and reliability of the control algorithm has been verified by down-well test.
作者
吴文晋
白玉新
程召江
李艳丽
WU Wenjin BAI Yuxin CHENG Zhaojiang LI Yanli(China Academy of Lauch Vehicle Techology No. 18 Research Institute, BeiJing , 100076, China CNPC XIBU Drilling Engineering Company Limited Drilling Technology Research Institute, Karamay, Xinjiang 834000,China Daqing Oilfield No. 5 Production Plant, Daqing , Heilongjiang 163000,China)
出处
《石油管材与仪器》
2017年第2期13-17,共5页
Petroleum Tubular Goods & Instruments
基金
国家科技重大专项"西部山前复杂地层安全快速钻进技术"(编号2011ZX05021-001)
关键词
垂直钻井系统
矢量控制算法
六位置控制算法
导向力合力
合力指向角
vertical drilling system
vector control algorithmin
＇ six-position＇ control
composition of forces
angle of composition of forces
