Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Submerging – raising – or manipulating line of pipe or cable...
Patent
1993-06-16
1994-09-13
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Submerging, raising, or manipulating line of pipe or cable...
134 8, 405158, 405169, F16L 104, B08B 904
Patent
active
053463390
ABSTRACT:
The present invention provides a method of cleaning a pipeline using a gel pig of a graft copolymer of a hydroxyalkyl cellulose prepared by a redox reaction with vinyl phosphonic acid. The gel pig is formed by hydrating the graft copolymer in an aqueous liquid. The gel pig is crosslinked by the addition of a Lewis base or Bronsted-Lowry base, to the gel in an amount sufficient to initiate crosslinking of the graft copolymer. Contaminants entrained in the crosslinked gel pig during the cleaning process may be separated by the addition of a pH reducing agent to the pig whereby the viscosity of the gel is caused to decrease. The gel may be used for further cleaning after contaminant separation by addition of an additional quantity of the Lewis base or Bronsted-Lowry base.
REFERENCES:
patent: 3523826 (1970-08-01), Lissant
patent: 3978678 (1976-09-01), Duncan et al.
patent: 4011620 (1977-03-01), Southgate
patent: 4216026 (1980-08-01), Scott
patent: 4252465 (1981-02-01), Broussard et al.
patent: 4360290 (1982-11-01), Ward
patent: 4379722 (1983-04-01), Scott
patent: 4389461 (1983-06-01), Scott
patent: 4416703 (1983-11-01), Scott
patent: 4451389 (1984-05-01), Clear
patent: 4486335 (1984-12-01), Majewicz
patent: 4493589 (1983-01-01), Ward
patent: 4543131 (1985-09-01), Purinton, Jr.
patent: 4982793 (1991-01-01), Holtmyer et al.
patent: 5067565 (1991-11-01), Holtmyer et al.
patent: 5122549 (1992-06-01), Holtmyer et al.
Dahl Jeffrey A.
Himes Ronald E.
Holtmyer Marlin D.
Hunt Charles V.
Halliburton Company
Kent Robert A.
Taylor Dennis L.
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