Patent · US Expired

Polymers for use in drilling muds

US5032295A · kind A · utility

36Cited by
39References
37Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 25, 1989
Grant dateJul 16, 1991
Priority date
Expiry dateApr 25, 2009

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC09K8/24
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A polymer for use as a deflocculant in drilling muds comprising at least one unsaturated carboxylic acid or its anhydride or salt, at least one unsaturated sulfonic acid or its salt, at least one unsaturated cationic-containing monomer, and optionally, one or more unsaturated non-ionic monomer and/or one mono or di phosphate ester of an unsaturated alcohol.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.