Cement compositions and method of cementing casing in a well

Patent · Tue Mar 04 04:00:00 EST 1986

OSTI ID:5866002

Baker, W S; Harrison, J J

This patent describes a cement composition for the preparation of a novel aqueous slurry useful in cementing casing in the borehole of a well comprising (1) a cement selected from Class A through H, (2) at least one polysaccharide, and (3) a 1,2-dicarbonyl wherein the amount of the 1,2-dicarbonyl is sufficient to obtain a viscosity of an aqueous slurry prepared from the composition at 140/sup 0/F and atmospheric pressure which is greater than the viscosity of such slurry at 70/sup 0/F and atmospheric pressure. A method is described of cementing casing in the borehole of a well comprising suspending the casing in the borehole of a well, whether vertical or slanted, pumping an aqueous cement slurry comprising (1) a cement selected from Class A through Class H, (2) at least one polysaccharide, (3) water, and (4) a 1,2-dicarbonyl wherein the amount of the 1,2-dicarbonyl is sufficient to obtain a viscosity of such aqueous slurry at 140/sup 0/F, and atmospheric pressure which is greater than the viscosity of the slurry at 70/sup 0/F and atmospheric pressure into the well until the slurry fills that portion of the space desired to be sealed and then maintaining the slurry in place until the cement sets.

• Assignee: Gulf Oil Corp., Pittsburgh, PA
• Patent Number(s): US 4573534
• OSTI ID: 5866002
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
ATMOSPHERIC PRESSURE
BUILDING MATERIALS
CARBOHYDRATES
CEMENTING
CEMENTS
CHEMICAL COMPOSITION
DISPERSIONS
HYDROGEN COMPOUNDS
MATERIALS
MEDIUM TEMPERATURE
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLYSACCHARIDES
PUMPING
SACCHARIDES
SOLUTIONS
VISCOSITY
WATER
WELL CASINGS
WELLS