Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1971-07-01
1976-09-21
Anderson, Harold D.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 75, 260 16, 260 296R, 260 40R, 260861, C08L 5108
Patent
active
039818357
ABSTRACT:
Cavities such as cracks and various other voids in subsurface formations are sealed such as for example, to stop lost circulation of drilling fluid in a well bore by a process wherein an emulsion having a continuous phase containing a polymerizable component, a discontinuous phase of water, and a catalyst system for the polymerizable component is forced into and allowed to set within the cavity. The catalyst and inhibitor therefor within the catalyst system are selected so that the emulsion begins to gel and set up only after the emulsion reaches the cavity which is to be plugged. The emulsion will set up in the presence of formation fluids and yield a very hard, high strength cement-like material. The resulting hardened cement-like material contains at least about 60% water dispersed therein, and can be penetrated by a drill bit without cracking or chipping.
REFERENCES:
patent: 2252271 (1941-08-01), Mathis
patent: 2443735 (1948-06-01), Kropa
patent: 3256219 (1966-06-01), Will
patent: 3591191 (1971-07-01), Coderre et al.
patent: 3629169 (1971-12-01), Bedighian
Anderson Harold D.
Woods Research and Development Corporation
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