HYDRODYNAMIC ANALYSIS OF SUCK-IN PULSED JET IN WELL DRILLING  

作　　者：WANG Rui-he DU Yu-kun NI Hong-jian MA Lin 

机构地区：[1]College of Petroleum Engineering, China University of Petroleum, Dongying 257061, China,

出　　处：《Journal of Hydrodynamics》2011年第1期34-41,共8页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 50974130);the Major State Basic Research Development Program of China (973 Program, Grant No. 2010CB226703);supported by the China University of Petroleum Ph. D. Thesis Excellent Training Fund (Grant No. Z10-04)

摘　　要：The development of new drilling methods is important for the exploration and production of oil fields.The pulsed jet is a drilling technology of high potentiality.This article proposes a new concept of suck-in pulsed jet with self-excited oscillation,by which a full use of the hydraulic power can be made in the annular space.A hydrodynamic analysis of suck-in pulsed jet with self-excited oscillation is carried out by numerical simulations and rock-breaking experiments.It is shown that with the jet,a negative pressure zone will be formed in the oscillation cavity to ensure automatic sucking of enough annular fluids and the formation of an efficient pulsed jet.The rock-breaking and pressure testing results have verified the reliability of the numerical simulation.The research provides a basis for the development of the pulsed jet drilling technology.The development of new drilling methods is important for the exploration and production of oil fields.The pulsed jet is a drilling technology of high potentiality.This article proposes a new concept of suck-in pulsed jet with self-excited oscillation,by which a full use of the hydraulic power can be made in the annular space.A hydrodynamic analysis of suck-in pulsed jet with self-excited oscillation is carried out by numerical simulations and rock-breaking experiments.It is shown that with the jet,a negative pressure zone will be formed in the oscillation cavity to ensure automatic sucking of enough annular fluids and the formation of an efficient pulsed jet.The rock-breaking and pressure testing results have verified the reliability of the numerical simulation.The research provides a basis for the development of the pulsed jet drilling technology.

关 键 词：drilling methods numerical simulation pulsed jet rock-breaking suck-in 

分 类 号：TU998.13[建筑科学—市政工程] U656.352[交通运输工程—港口、海岸及近海工程]