Aluminate-thickened well treating fluid and method of use

Patent · Tue Jan 14 04:00:00 EST 1975

OSTI ID:6767495

Herce, J A; Tuttle, R N

A metal hydroxide-thickened fluid is described that contains a relatively slow reacting pH-reducing reactant that subsequently yields at least enough acidic material to dissolve the thickening material. Such a reaction is advantageous in subsequently converting the thickened fluid (and any acid-soluble particles that are suspended in the fluid) to a liquid having a viscosity substantially as low as that of water. The fluid serves as a well-treating fluid that has a low fluid loss and contains substantial chemically removable viscosifying and fluid-loss-preventing components. This fluid consists of a metal hydroxide-thickened aqueous liquid suspension of particles of a solid material that is soluble in either a relatively strongly acidic or a basic aqueous liquid. Such a completion fluid preferably also contains enough of either, but not both, dissolved calcium bromide or calcium chloride to provide a fluid system having a selected specific gravity.

• Assignee: Shell Oil
• Patent Number(s): US 3860070
• OSTI ID: 6767495
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ADDITIVES
ALKALINE EARTH METAL COMPOUNDS
ALUMINATES
ALUMINIUM COMPOUNDS
AQUEOUS SOLUTIONS
BROMIDES
BROMINE COMPOUNDS
CALCIUM BROMIDES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
MIXTURES
OIL WELLS
OXYGEN COMPOUNDS
PLUGGING
SOLUTIONS
VISCOSITY
WELL SERVICING
WELLS