Methods and additives for delaying the release of chemicals in aqueous fluids

Patent · Tue May 13 00:00:00 EDT 1980

OSTI ID:5331127

Burnham, J W; Briscoe, J E; Elphingstone, E A

Additives are provided for bringing about the delayed release of a chemical such as a gel breaker or demulsifier in an aqueous fluid such as a gelled oil well hydraulic fracturing or fracture-acidizing fluid. The additives are pelletized solids consisting of the chemical to be released such as sodium laryl sulfate. A gelling agent capable of being hydrated such as a polysaccharide, and a breaker for the gel produced by the gelling agent when hydrated such as a persulfate or an enzyme. 33 claims.

• Assignee: Halliburton Co.
• Patent Number(s): US 4202795
• OSTI ID: 5331127
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
ADDITIVES
ALKALI METAL COMPOUNDS
CARBOHYDRATES
COLLOIDS
COMMINUTION
CONTROL
DEMULSIFIERS
DISPERSIONS
FLUIDS
FRACTURING
FRACTURING FLUIDS
GELS
HYDRATION
HYDRAULIC FRACTURING
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
PROCESS CONTROL
SACCHARIDES
SODIUM COMPOUNDS
SODIUM SULFATES
SOLVATION
STIMULATION
SULFATES
SULFUR COMPOUNDS
TIME DELAY
WELL STIMULATION
WELLS