Lignin-based cement fluid loss control additive

Patent · Tue May 22 04:00:00 EDT 1990

OSTI ID:6728183

Schilling, P

This patent describes a hydraulic cement slurry composition. It comprises: a hydraulic cement, and the following expressed as parts by weight per 100 parts of the hydraulic cement, water from about 25 to 105 parts, and from abut 0.5 to 2.5 parts of a compound selected from the group consisting of a sulfonated lignin and a sulfomethylated lignin, wherein the lignin has been sequentially crosslinked by reacting the lignin with a member of the group consisting of formaldehyde and epichlorohydrin and alkoxylated with between about 2 to about 6 moles of a compound selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide and a combination thereof per 1000 g of the lignin.

• Assignee: Westvaco Corp., New York, NY (USA)
• Patent Number(s): US 4926944; A
• Application Number: PPN: US 7-297653A
• OSTI ID: 6728183
• 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
BUILDING MATERIALS
CARBOHYDRATES
CEMENTING
CEMENTS
CHEMICAL COMPOSITION
LIGNIN
MATERIALS
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
WELL COMPLETION
WELLS