Patent ID: 7927426

Claim:
The method of cleaning blockage material from a pipeline, comprising providing a string of tubing within said pipeline from a proximate location at the entrance to the pipeline to a distal location within said pipeline, providing a pig assembly comprising: a flexible cup which will collect pipeline blockage material, a seal which sealingly engages the internal bore of the pipeline being cleaned, a connection to the distal end of said string of tubing, pushing said pig assembly with fluid in the annular area between the internal bore of said pipeline and the outer diameter of said string of tubing until said pig assembly engages said blockage material, and pumping a flow of fluid thru said string of tubing to a location beyond a portion of said blockage material, said flow of fluid urging said pig assembly and said portion of said blockage material towards said proximate location, and opening spring loaded dogs to retain said portion of said blockage material within said flexible cup.