Carboxymethylhydroxyethyl cellulose in drilling, workover and completion fluids
Patent
·
OSTI ID:6541121
Certain carboxymethylhydroxyethyl cellulose (CMHEC) solutions in waters of various salinities are gelled by dichromate ion at a pH of about 5 or less, thus forming a drilling fluid or component thereof. In an embodiment a CMHEC water solution is gelled using an alkali metal dichromate, e.g., Na2Cr2O7.2H2O.
- Assignee:
- Phillips Petroleum Co
- Patent Number(s):
- US 4239629
- OSTI ID:
- 6541121
- Resource Relation:
- Patent File Date: Filed date 5 Jun 1978
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
DRILLING FLUIDS
CHEMICAL COMPOSITION
CELLULOSE
CHROMATES
GELS
HYDRATES
SODIUM COMPOUNDS
WORKING FLUIDS
ALKALI METAL COMPOUNDS
CARBOHYDRATES
CHROMIUM COMPOUNDS
COLLOIDS
DISPERSIONS
FLUIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
TRANSITION ELEMENT COMPOUNDS
020300* - Petroleum- Drilling & Production
DRILLING FLUIDS
CHEMICAL COMPOSITION
CELLULOSE
CHROMATES
GELS
HYDRATES
SODIUM COMPOUNDS
WORKING FLUIDS
ALKALI METAL COMPOUNDS
CARBOHYDRATES
CHROMIUM COMPOUNDS
COLLOIDS
DISPERSIONS
FLUIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
TRANSITION ELEMENT COMPOUNDS
020300* - Petroleum- Drilling & Production