Watertight packing used in an oil or gas well, typically to seal a well after the withdrawal of a drill or to seal the gap between a drill pipe and the side of the boring.
Origin
Mid 19th century; earliest use found in U.S. Patents.
Definition of well packing in US English:
well packing
noun
Watertight packing used in an oil or gas well, typically to seal a well after the withdrawal of a drill or to seal the gap between a drill pipe and the side of the boring.
Origin
Mid 19th century; earliest use found in U.S. Patents.