Increasing the clay-dissolving capability of a relatively high pH self-generating mud acid
Patent
·
OSTI ID:6568419
The clay-dissolving capability of a self-generating mud acid comprising an aqueous solution or dispersion of a fluoride salt, an ester of a 1-5 carbon atom aliphatic alcohol and a 2-5 carbon atom fatty acid suitable for use at temperatures exceeding about 180/sup 0/F is improved by adding an effective amount of an aminopolyacetic acid salt chelating or complexing agent.
- Assignee:
- Shell Oil Co.
- Patent Number(s):
- US 4089787
- OSTI ID:
- 6568419
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
BOREHOLES
CARBOXYLIC ACIDS
CAVITIES
CHELATING AGENTS
CLAYS
DISPERSIONS
DISSOLUTION
DRILLING FLUIDS
ESTERS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MINERALS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
SOLUTIONS
WELLS
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
BOREHOLES
CARBOXYLIC ACIDS
CAVITIES
CHELATING AGENTS
CLAYS
DISPERSIONS
DISSOLUTION
DRILLING FLUIDS
ESTERS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MINERALS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
SOLUTIONS
WELLS