快速产生钻井液连续波信号的往复阀阀口设计.pdfVIP

Vol No PET ROL EU M DRIL LING T EC H NIQ U ES Jan doi syztj s Hz T E A Design for a Valve Port of a Reciprocating Valve that Rapidly Generates Continuous Wave Signals in Drilling Fluid FANG Jun WANG Zhengxu JIA Peng M OE K e L abo rator o Petrole um En inee r ing China Univ e rs it o Petroleum Be i ing Be i y y f g y f j j ing China M OE K ey L abo r ato ry of Petrole um Eng inee r ing China Univ e rs ity of Petroleum H uadong Qing dao S handong China Abstract Due to the f act that conevalve and rotary valve sig nal generators have such characteristics as po sitive pulse sig nal w ith low f requencies distribution space of valve port limited by radial size of drill string insufficient f luid supply capacities etc a reciprocating valve that can rapidly generate continuous w ave sig nals has been desig ned On the basis of introducing the composition of reciprocating valve and the mechanism of continuous w ave sig nal generation a mathematical calculation model of valve port shape curve w as built and the impact of valve port shape and distribution on the characteristics of generating con tinuous pressure w ave w as studied T he simulation and computation result s show ed that the correlation co eff icient betw een the pressure w ave generated by the desig ned valve port s w ith valve port s on each lay er and w ith lay ers along the axial direction and the ideal sinusoidal pressure w ave w as