PIPELINE PIG WITH LONGITUDINALLY INCOMPRESSIBLE MEMBER

摘要

PIPELINE PIG WITH LONGITUDINALLY INCOMPRESSIBLE MEMBERABSTRACT OF THE DISCLOSUREA pipeline pig of the type to be propelled through apipeline by a pressure gradient in the line to clear accumulationsand deposits of sludge, scale and other material from the walls ofthe pipe. The pig includes an elongated cylindrical foamedelastomer body member and a substantially incompressible columnmember, located generally co-axially within, and with ends ex-tending beyond the ends of, the body member.