摘要
钟摆钻具、满眼钻具、偏心钻具等防斜钻具组合在特定的条件下起到了一定的防斜作用,但其防斜效果受钻井操作参数的影响较大,有时不得不降低钻进速度以求得到较小的井斜率。为了解决上述问题,设计了FG新型复合式高效防斜工具。FG型防斜工具的显著特点是其防斜效果受钻压、转速等钻井参数影响较小,钻头侧向力大小基本不随钻压改变,在旋转过程中钻头侧向力方向可以不断变化。FG型防斜工具可以在正常钻压及转速条件下钻进,并将井斜控制在较小的范围之内。理论研究和算例分析表明,FG型防斜工具具有良好的防斜效果。
Most conventional anti-deviation devices have inherent limitations, and their anti-deviation effects are greatly affected by drilling parameters such as bit weight and rotary speed. In order to overcome these limitations, a new type FG anti-deviation device was designed. The bit side force of FG type anti-deviation device is almost never affected by drilling parameters, and the direction of bit side force continuously vary while drill string is rotating. The FG type anti-deviation device can operate under the normal bit weight and rotary speed. The theoretical analysis and case history proved the feasibility of this device.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2005年第3期98-101,共4页
Acta Petrolei Sinica
基金
国家自然科学基金(No.50234030)资助。
关键词
垂直钻井
井斜控制
防斜工具
钻压
钻井参数
钻头侧向力
vertical drilling
deviation control
anti-deviation device
bit weight
drilling parameter
bit side force
