F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 55/26 (2006.01) F16L 55/38 (2006.01)
Patent
CA 2240330
A pipeline pig comprises a body and at least one flexible annular outwardly extending seal on and around the body for sealingly contacting a pipeline interior wall under differential fluid pressure whereby to propel the pig along the pipeline. The pig also comprises fluid bypass duct means through the body and resilient frictional means on and extending from the body adapted to contact the pipeline interior wall and exert a drag on the pig. An adjustable bypass flow control means is provided which is adapted to regulate fluid flow through the duct means and thus the speed of the pig.
Couchman Peter Allan
Jones Brian Kenneth Campbell
Smith Ian
Fetherstonhaugh & Co.
Pii Limited
Pipeline Integrity International Limited
LandOfFree
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