Set retarded cement compositions and methods for well cementing

Patent · Tue Sep 17 04:00:00 EDT 1991

OSTI ID:5797606

Brothers, L E; Lindsey, D W; Terry, D T

This patent describes a retarded cement composition consisting essentially of hydraulic cement, water, a set retarder and a borate compound. It comprises the set retarder, a copolymer consisting of acrylic acid and 2-acrylamido, 2-methylpropane sulfonic acid (AMPS) present in the copolymer in the range of from about 40 to about 60 mole percent, the copolymer having an average molecular weight below about 5,000 such that a 10 percent aqueous solution of the copolymer has a Brookfield viscosity reading at 20 rpm of the UL Adapter Spindle in the range of from about 2 to less than 5 centipoises, the amount in the range of from about 0.3 percent to about 5.0 percent by weight of the hydraulic cement; and further wherein the borate compound is capable of providing a borate ion species in the composition.

• Assignee: Halliburton Co., Duncan, OK (United States)
• Patent Number(s): A; US 5049288
• Application Number: PPN: US 7-690039
• OSTI ID: 5797606
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
AQUEOUS SOLUTIONS
BORON COMPOUNDS
BUILDING MATERIALS
CEMENTING
CEMENTS
CHEMICAL COMPOSITION
COPOLYMERS
DISPERSIONS
MATERIALS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
SOLUTIONS
WELL COMPLETION
WELLS