Drilling fluid containing a copolymer filtration control agent

Patent · Tue Oct 06 04:00:00 EDT 1981

OSTI ID:5879270

Enright, D P; Lucas, J M; Perricone, A C

The invention relates to an aqueous drilling fluid composition, a filtration control agent for utilization in said aqueous drilling fluid, and a method of forming a filter cake on the wall of a well for the reduction of filtrate from said drilling fluid, by utilization of a copolymer of: (1) a (Meth) acrylamido alkyl sulfonic acid or alkali metal salt thereof; and (2) a (Meth) acrylamide or n-alkyl (Meth) acrylamide. The copolymer may be cross-linked with a quaternary ammonium salt cross-linking agent.

• Assignee: Milchem Inc
• Patent Number(s): US 4293427
• OSTI ID: 5879270
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
ACRYLAMIDE
ALKALI METAL COMPOUNDS
AMIDES
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COPOLYMERS
CROSS-LINKING
DISPERSIONS
DRILLING
DRILLING FLUIDS
FILTERS
FILTRATION
FLUIDS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
POLYMERIZATION
POLYMERS
SEPARATION PROCESSES
SOLUTIONS
SULFONIC ACIDS
WELL DRILLING