摘要
河北邢台XD1井是一口水平分支井,该井设计有20个水平分支孔,每个分支孔有3～5个控制点,水平施工时,水平井段长,方位变化很大,要摆动接进70～80度左右的方位变化,这样井眼轨迹就比较弯曲,使的摩阻增大。在施工N1,N2,水平分支孔时,就出现了严重的托压现象及粘卡现象,特别是在滑动钻进时,不能有效的把钻压传递到钻头上,工具面控制很困难,把水力振荡器使用在水平分支井上后,加上合理的钻井技术参数,有效的克服了在滑动钻进过程中遇到的问题。结果表明,把水力振荡器技术应用到水平分支井中,能够有效的改善井下钻压的传递,明显降低摩阻,防止钻具粘卡事故的发生,提高钻进速度,缩短施工周期。
Well XD1 in Xi ngtai, Hebei is a horizontal branch well, which is designed with 20 horizontal branch holes, each of which has 3- 5 control points. During horizontal construction, the horizontal well segment is long and its orientation changes greatly, and it needs to swing into the direction change of about 70-80 degrees. In this way, the well trajectory is relatively curved and the friction increases. In the construction of N1,N2 and horizontal branch holes, serious phenomenon of pressure holding and sticking occurred, especially in the sliding drilling, the drill pressure can not be effectively transferred to the drill bit, tool surface control is very difficult After using the hydraulic oscillator on the horizontal branch well and adding reasonable drilling technical parameters, the problems encountered in the sliding drilling process are effectively overcome. The results show that the application of hydraulic oscillator technology to horizontal branch wells can effectively improve the transmission of downhole drilling pressure, significantly reduce friction, prevent the occurrence of sticking accidents of drill tools, improve drilling speed and shorten construction cycle.
作者
林正平
宋洪果
Lin Zhengping;Song Hongguo(Sichuan Salt Geological Drilling Brigade,Zigong Sichuan,64300)
出处
《中国井矿盐》
CAS
2018年第6期24-26,共3页
China Well and Rock Salt
关键词
水力振荡器
托压
工具面
摩阻
滑动钻进
Hydraulic oscillator
press
tool surface
friction
slide drilling
