Drilling fluid containing a copolymer filtration control agent

Patent · Tue Oct 15 04:00:00 EDT 1985

OSTI ID:5945049

Lucas, J M

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: a (meth) acrylamido alkyl sulfonic acid or alkali metal salt thereof; and N, N-dialkyl (meth) acrylamide. The copolymer may be cross-linked with N,N'-methylenebisacrylamide or other appropriate cross-linking agent.

• Assignee: Milchem Incorporated
• Patent Number(s): US 4547299
• OSTI ID: 5945049
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACRYLAMIDE
ALKALI METAL COMPOUNDS
AMIDES
AQUEOUS SOLUTIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CONTROL
COPOLYMERS
CORROSION INHIBITORS
CORROSION PROTECTION
CROSS-LINKING
DISPERSIONS
DRILLING FLUIDS
FILTRATION
FLUIDS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
NATURAL GAS WELLS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
POLYMERIZATION
POLYMERS
SCALE CONTROL
SEPARATION PROCESSES
SOLUTIONS
SULFONIC ACIDS
WELLS