Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Patent
1997-07-16
1998-08-25
Chin, Randall E.
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
134 2212, 1510417, 1510419, 15104061, B08B 904
Patent
active
057979936
ABSTRACT:
The invention is an expandable pipeline pig for separating different liquids and gases in a flexible oil/gas export riser feeding to a larger diameter rigid oil/gas export pipeline. The invention includes a cylindrical body member; a front plate member, a center portion of which is fixedly attached to a front portion of elongated cylindrical body member; a rear plate member, a center portion of which is fixedly attached to a rear portion of elongated cylindrical body member; a collar member slidably disposed about elongated cylindrical body member, the collar member has an outer portion forming a ring about of the elongated cylindrical body member; front rib members, which have front-end portions pivotably attached to a rear side portion of the front-end plate, and where the point of such pivotable attachments is radially equidistant about the elongated cylindrical body member; rear strut members which have front-end portions and rear-end portions; at least one bias means for moving the front and rear strut members toward the front of the elongated cylindrical body member, which deploys the front and rear rib members; a front diaphragm member, where radial portions of the front diaphragm member are flexibly attached to the front rib members a front seal member flexibly attached to outer circumference portions of the front diaphragm member; a rear diaphragm member, where radial portions of the rear diaphragm member are flexibly attached to the rear rib members; a rear seal member flexibly attached to outer circumference portions of the front diaphragm member.
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Chris F. Kershaw, "Design and development of a 24-in/34-in dual-diameter pig for an offshore crude-oil export pipeline incorporating a wye piece", The Pipeline Pigging Conference, Feb. 13-16, 1995.
Chevron U.S.A. Inc.
Chin Randall E.
Hadlock Timothy J.
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