Well unit dynamoter installation means and method

Patent · Tue Aug 14 04:00:00 EDT 1990

OSTI ID:6593675

Hen, J

This patent describes a method for inhibiting scale in a well penetrating a subterranean formation for the production of fluids from the formation. It comprises: dissolving polymeric inhibitor comprising an alpha, beta-ethylenically unsaturated carboxylic acid having a molecular weight range of about 500 to 10,000 and a polyvalent cation in an aqueous solution having a pH effective to form a water-soluble complex of the inhibitor and the polyvalent cation wherein the equivalent ratio of polyvalent cation to inhibitor is less than or equal to 0.5 in the aqueous solution; and injecting the inhibitor, polyvalent cation aqueous solution into the formation about the well and allowing natural conditions in the formation to raise the pH of the solution in an amount sufficient to cause controlled precipitation and increased deposition of the scale inhibitor in situ in the form of a water-soluble polyvalent cation inhibitor complex.

• Assignee: Mobil Oil Corp., New York, NY (USA)
• Patent Number(s): A; US 4947934
• Application Number: PPN: US s 7-305055
• OSTI ID: 6593675
• 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
CARBOXYLIC ACIDS
CATIONS
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
DRILLING FLUIDS
DYNAMOMETERS
ENHANCED RECOVERY
FLUIDS
INJECTION WELLS
INSTALLATION
IONS
KINETICS
MEASURING INSTRUMENTS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLYMERS
REACTION KINETICS
RECOVERY
WELLS