公开(公告)号：US5103430A

公开(公告)日：1992-04-07

申请号：US607678

申请日：1990-11-01

申请人： John D. Jeter ,  Leon M. Earl ,  Merlin P. Landry

发明人： John D. Jeter ,  Leon M. Earl ,  Merlin P. Landry

IPC分类号： E21B47/18

CPC分类号： E21B47/187 ,  E21B47/18

摘要： A downhole signal generating mud pulser has a poppet and orifice signal valve to variably resist the drilling fluid stream. The poppet is upstream of the orifice and is moved by a piston in fluid communication with opposite flow related sides of the signal valve such that more pressure drop across the valve applies more piston force to open the valve. The poppet is spring biased toward the orifice and the piston force and spring balance when a preselected operating pressure exists. A servo valve controls flow in a by-pass loop to apply additional pressure to the piston to create a signal pulse when open. The servo valve is urged closed by flow in the servo loop and the closing is retarded by a dashpot to determine signal duration. The servo valve is spring biased to open and is automatically latched closed by a latch that responds to a solenoid actuated to release the servo valve. Options include replacement of the dashpot timer with a second latch position which latches the servo valve open to cause a signal pulse, the duration of which is determined by the controlling instrument which acts to release the latch from both positions.

摘要翻译： 井下信号产生泥浆脉冲发生器具有提升阀和孔口信号阀，以可变地抵抗钻井液流。 提升阀位于孔口的上游，并通过与信号阀的相对流动相关的流体连通的活塞移动，使得越过阀门的更多压降施加更多的活塞力来打开阀门。 当存在预选的操作压力时，提升阀弹簧偏压朝向孔口和活塞力和弹簧平衡。 伺服阀控制旁路循环中的流量，以向活塞施加额外的压力，以在打开时产生信号脉冲。 伺服阀通过伺服回路中的流量被关闭，闭合由缓冲器延迟以确定信号持续时间。 伺服阀被弹簧偏置打开，并被锁定器自动锁定，该闩锁响应于致动的螺线管以释放伺服阀。 选项包括用第二个闩锁位置替换缓冲器定时器，该第二闩锁位置锁定伺服阀打开以产生信号脉冲，其持续时间由用于从两个位置释放闩锁的控制仪器确定。