公开(公告)号：US06536461B2

公开(公告)日：2003-03-25

申请号：US10080109

申请日：2002-02-21

申请人： Robert R. Decker ,  Harold B. Skeels ,  Steven A. Reinhardt

发明人： Robert R. Decker ,  Harold B. Skeels ,  Steven A. Reinhardt

IPC分类号： B08B902

CPC分类号： F16L55/46 ,  Y10T137/4891

摘要： A subsea pig launching apparatus for launching one or more pigs into a flowline which is fluidly connectable to a source of well fluid comprises at least one first hub to which the source of well fluid is connectable and which is in communication with the flowline, a first valve which is positioned between the first hub and the flowline, a second hub which is in communication with the flowline, and a pig launcher which is removably connectable to the second hub and which comprises at least one pig, at least one launch valve which is positioned between a pressure source and the pig, and a launch actuator for selectively opening and closing the launch valve. The launch actuator is controlled by a signal which is communicated through at least one of a number of external control and service lines that are connected to a control and service umbilical for the source of well fluid.