Sealing composition and method
The present invention consists of employing as a temporary sealing and plugging agent in the plugging of selected intervals in boreholes a plugging gel composition consisting of: (1) a hydrophobically treated galactomannan gum; (2) a water-swellable suspending agent; (3) a buffering agent; (4) a cross-linking and hydration agent for the gum; (5) water; and (6) optionally, a degradation agent. The constituents are admixed with a sufficient amount of water to make a readily pumpable mixture. The slightly viscous gel solution is introduced into the formation to be sealed where it autogeneously gels, i.e., sets up, to give a temporary, fluid-tight pressure-resistant, rigid gel, and subsequently disintegrates and ceases to plug. (7 claims)
- Assignee:
- TUL; EDB-81-114537
- Patent Number(s):
- US 3615794
- OSTI ID:
- 6242514
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
BOREHOLES
CAVITIES
CHEMICAL COMPOSITION
COLLOIDS
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GELS
HYDROGEN COMPOUNDS
MATERIALS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM
PETROLEUM PRODUCTS
PLUGGING
POLYMERS
RESINS
SEALING MATERIALS
SEALS
WATER
WELL COMPLETION
WELLS