Patent · US Active

Thermally stable subsea control hydraulic fluid compositions

US8759265B2 · kind B2 · utility

1Cited by
19References
14Claims
0Family size

Inventor

Key dates

Filing dateJul 15, 2008
Grant dateJun 24, 2014
Priority date—
Expiry dateMar 3, 2030

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10N2040/08
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

An aqueous hydraulic fluid composition comprising of one or more lubricants such as a monovalent metal salt, ammonium, or alkanolamine salt of a dicarboxylic acid, such as a C21 dicarboxylic acid is described in which the aqueous hydraulic fluid composition demonstrates increased thermal stability when exposed to elevated temperatures for a prolonged period of time while being able to tolerate the presence of 10% v/v synthetic seawater. The aqueous hydraulic fluid composition contains less than about 20% by weight (preferably none or substantially none) of an oil selected from the group consisting of mineral oils, synthetic hydrocarbon oils, and mixtures thereof.

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