摘要
倒装钟摆钻具组合是一种新型的直井防斜钻具组合,在小井斜角高钻压下表现出了较好的防斜特性。以311.5mm井眼为例对倒装钟摆钻具组合的设计方法进行了研究。通过对稳定器上下钻铤尺寸搭配以及不同钟摆长度的分析可知,适当增加稳定器以上钻铤尺寸,降低稳定器以下钻铤尺寸以及增加稳定器与钻头之间钻铤的长度将有助于提高倒装钟摆钻具组合的防斜能力。倒装钟摆钻具组合设计时,在钻头与稳定器之间的钻铤不与井壁接触的前提下,应该使设计的钻具组合得到尽量大的钻头转角。研究为倒装钟摆钻具组合的优化设计提供依据。
Inverted pendulum drill assembly is one kind of new drill assembly for well deviation control, it displays well packed hole character under the small deviation angle and high bit pressure guards. In order to correctly use this kind of drill assembly, the authors of the article take the 311.5mm well as example to study the design approach of inverted pendulum drill assembly and provide the basis for Inverted pendulum drill assembly optimized design. Through analyzing size paring of the stabilizer above and below drill collar, as well as the different pendulum length, it is recognized that suitably increasing drill collar size above stabilizer and reducing the drill collar size below stabilizer and increasing the color length between stabilizer and bit can enhance the well deviation control ability of inverted pendulum drill assembly. When designing the inverted pendulum drill assembly, big drill bit corner should be obtained if the drill collar between bit and stabilizer don't contact the borehole wall.
出处
《西南石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第6期168-170,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
倒装钟摆钻具
钻头转角
钻头侧向力
井斜
设计方法
inverted pendulum drill assembly
bit side force
bit inclination angle
well deviation
design approach
