Well servicing fluid

Patent · Tue Jul 02 04:00:00 EDT 1991

OSTI ID:6005050

Liao, A

This patent describes a well servicing fluid. It comprises an aqueous medium from about 0.2 to about 5 pounds per barrel of a partially hydrolyzed homopolymer of acrylamide having an average molecular weight greater than 1 million, and a calcium-controlling additive. It comprises from about 0.1 to about 2.5 pounds per barrel of the fluid of an alkali metal bicarbonate, from about 0.1 to about 2.5 pounds per barrel of the fluid of a water-soluble, carboxylic acid, and from about 0.1 to about 1.5 pounds per barrel of the fluid of a terpolymer containing from about 40 to about 70% by weight acrylamide, from about 20 to about 40% by weight of an acrylic acid and from about 5 to about 20% by weight of 2-acrylamido-2-methylpropanesulfonic acid, the terpolymer having an average molecular weight of from about 5 to about 10 million.

• Assignee: Baroid Technology, Inc., Houston, TX (United States)
• Patent Number(s): US 5028341; A
• Application Number: PPN: US 7-626902
• OSTI ID: 6005050
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACRYLAMIDE
ADDITIVES
ALKALI METALS
ALKALINE EARTH METALS
AMIDES
AQUEOUS SOLUTIONS
CALCIUM
CHEMICAL COMPOSITION
DISPERSIONS
DRILLING FLUIDS
ELEMENTS
FLUIDS
METALS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERS
SOLUTIONS
WELLS