Polymers for acid thickening
Hydraulic fracturing fluids are described which are composed of acids, especially dilute acid solutions, thickened with copolymers of dimethyl diallyl ammonium chloride and a monomer capable of postreaction after polymerization to provide branching or partial crosslinking which extends the chain length of dimethyl diallyl ammonium chloride polymers. Suitable monomers capable of postreaction after polymerization to provide branching or partial crosslinking include n-methylolacrylamide and diacetone acrylamide. These polymers may be prepared by conventional solution polymerization methods and may contain 50% to 80% by weight dimethyl diallyl ammonium chloride and 2% to 50% by weight of a monomer capable of postreaction. 7 claims.
- Assignee:
- Calgon Corp.
- Patent Number(s):
- US 4100079
- OSTI ID:
- 6274459
- Resource Relation:
- Patent File Date: Filed date 25 Feb 1977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
FRACTURING FLUIDS
CHEMICAL COMPOSITION
WELLS
HYDRAULIC FRACTURING
CHEMICAL PREPARATION
COPOLYMERS
WELL STIMULATION
COMMINUTION
FLUIDS
FRACTURING
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
STIMULATION
SYNTHESIS
020300* - Petroleum- Drilling & Production
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