The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2001
Filed:
Nov. 18, 1997
Simon Neil Duncum, Bracknell, GB;
Antony Roland Edwards, Beverley, GB;
Keith James, Banstead, GB;
Christopher George Osborne, Sandhurst, GB;
BP Exploration Operating Company Limited, London, GB;
Abstract
A hydrate inhibitor comprising a blend of an additive (i) and at least one of an additive (ii) and an additive (iii) wherein additive (i) is a polymer of an ethylenically unsaturated N-heterocyclic carbonyl compound, with 6-8 ring atoms in the heterocyclic ring, additive (ii) is a corrosion inhibitor and additive (iii) is a salt of formula (I):[R,(R,)XR,],Y,1/v, I wherein each of R,, R,and R,is bonded directly to X, each of R,and R,, which may be the same or different is an alkyl group of at least 4 carbons, X is S, NR,or PR,, wherein each of R,and R,which may be the same or different represents hydrogen or an organic group, with the proviso that at least one of R,and R,is an organic group of at least 4 carbons, especially at least 5 carbons, and Y is an anion of valency v, wherein v is an integer of 1-4.