Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1985-10-04
1990-07-31
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
252 851, 166 62, 405154, 1061972, 1062871, C09K 700, E02F 510
Patent
active
049446347
ABSTRACT:
Magnesium oxide is included in a bentonite clay anti-friction composition in an amount of 0.025-0.5% based on the dry weight of the clay to substantially improve the efficiency of underground cable or pipe installation. The anti-friction composition is applied between an outer surface of the cable or pipe and tunnel walls to substantially and unexpectedly reduce the amount of force, e.g. hydraulic pressure, necessary to push or pull the cable or pipe into its intended location within the tunnel. The composition includes a water-swellable colloidal smectite clay, such as bentonite, and magnesium oxide in an amount of 0.025-0.5% based on the dry weight of the clay. In another embodiment, the composition also includes a polymeric fluid loss reduction agent, such as carboxymethyl cellulose to decrease the amount of the clay composition absorbed into the tunnel walls. Soil is extracted underground to form a tunnel and the cable or pipe is forced by a hydraulic jack, into the tunnel. The tunnel walls surrounding the cable or pipe are contacted with the composition comprising a water-swellable colloidal smectite clay and magnesium oxide in an amount of 0.025-0.5% based on the dry weight of the clay, while forcing the cable or pipe into the tunnel.
REFERENCES:
patent: 3115416 (1963-12-01), Chavrier
patent: 3220946 (1965-11-01), Turner
patent: 3309313 (1967-03-01), Callahan, Jr.
patent: 3589135 (1971-06-01), Ede
patent: 3772893 (1973-11-01), Eilers
patent: 3894402 (1975-07-01), Cherrington
patent: 3947286 (1976-03-01), Myers et al.
patent: 3953335 (1976-04-01), Jackson
patent: 3989632 (1976-11-01), Fischer et al.
patent: 4014394 (1977-03-01), Bailey
patent: 4087365 (1978-05-01), Clem
patent: 4209409 (1980-06-01), Forster et al.
patent: 4221503 (1980-04-01), Cherrington
patent: 4287103 (1981-09-01), Francis et al.
patent: 4319648 (1982-03-01), Cherrington
patent: 4439328 (1984-03-01), Moity
patent: 4500436 (1985-02-01), Pabley
patent: 4561985 (1985-12-01), Glass, Jr.
Alexander William
Bertane Mark
American Colloid Company
Olsen Arlen L.
Taylor Dennis L.
LandOfFree
Anti-friction composition containing MgO and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-friction composition containing MgO and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-friction composition containing MgO and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1395908