冲击钻井粒子注入系统研究

Research on particle injection system in percussion drilling

徐依吉 赵健 毛炳坤 刘芬

XU Yiji ZHAO Jian MAO Bingkun LIU fen

中国石油大学石油工程学院，山东东营　257061

College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China

冲击钻井粒子注入系统是随着粒子冲击钻井技术的提出而发展起来的一套新型粒子注入系统（Particle Injection System），是为了实现粒子的均匀、连续、平稳注入而研制的。该系统能将粒子（钢质粒子）以一定的速率，均匀、连续、平稳地注入到高压钻井液中，通过采用2个粒子注入管交替完成注入粒子和加压排出粒子的过程，利用螺杆挤压泵保证了粒子均匀、平稳地注入到高压钻井管汇中。分析了注入系统的注入原理，完成了关键部分的结构设计，包括粒子举升系统、注入管、螺杆挤压泵等，并通过实验得到了不同压力下节流圈直径与粒子体积分数的关系，为该系统在现场的应用提供了理论和实验依据。引用格式：徐依吉，赵健，毛炳坤，等.冲击钻井粒子注入系统研究［J］.石油钻采工艺，2012，34（1）：1-5.

Particle Injection System (PIS) in percussion drilling is a new type of particle injection system developed with the technology of percussion drilling. The particles can be injected into the high pressure drilling fluid in a designed rate, uniformly, continuously and securely. Two injection tubes were used in this system to inject particles and pressurize particles to be excluded. The two processes were completed by turns, ensuring the continuous injection of particles. Particles could be injected into the head pipe in a certain rate uniformly and stably by the screw sqeegee pump. A particle injecting principle was put forward, and the structure of the key components was designed, including particle lifting system, injection tube, screw sqeegee pump, and so on. The relationship of throttle diameter and the particle volume percentage under different pressure was obtained through experiments, which supplied the theoretical and experimental basis for field applications..