井下动力钻具滑动钻进钻桥塞钻头加压技术

Compression technique for drilling bit of drillable bridge plug during downhole motor slide drilling

于振东 徐月强 李子丰

YU Zhendong XU Yueqiang LI Zifeng

大庆油田有限责任公司试油试采分公司，黑龙江大庆　163412 燕山大学石油工程研究所，河北秦皇岛　066004

Oil Testing and Early Production Test Branch Company, Daqing Oilfield Co. Ltd., Daqing 163412, China Petroleum Engineering Institute of Yanshan University, Qinhuangdao 066004, China

在定向井和水平井钻桥塞时，为了减少磨损，可以采用井下动力钻具滑动钻进，钻头加压技术成了关键。应用钻柱拉力扭矩模型向司钻提供了包含桥塞深度、不同摩擦因数下的下钻到底时的大钩负荷和加不同钻压时的大钩负荷的钻压控制参考表。司钻根据下钻到底时的大钩负荷从表中找到所加钻压对应的大钩负荷，然后下放钻具，让大钩负荷与设计值一致，加上钻压。现场4 口井钻桥塞过程中，没有观察到明显的托压现象。

While drilling out bridge plugs in directional wells or horizontal wells, the downhole motor can be used for slide drilling in order to reduce wear and tear; in this case, technique of putting press on drilling bit becomes a critical factor. A drill string pull-torque model was used to provide the driller with a reference table containing bridge plug depth, hook load under different friction coefficients when drilling to the bottom and press control of hook load when adding different presses on bit. The driller will find the corresponding press of hook load from the table when drilling to the bottom, then lower the drilling tools, keeping the hook load consistent with the designed value, and then put on press on bit. Drilling out the plugs in four wells on site, no evident backing pressure was observed.

10.13639/j.odpt.2014.06.009