Equivalent circulating density control in deep water drilling

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 77/06 (2006.01) C09K 8/035 (2006.01) C09K 8/32 (2006.01) E21B 21/06 (2006.01)

Patent

CA 2716023

A method of providing a substantially constant rheological profile of a drilling fluid over a temperature range of about 120°F to about 40°F includes adding a drilling fluid additive to the drilling fluid, wherein the drilling fluid additive includes the reaction product of a carboxylic acid with at least two carboxylic moieties; and a polyamine having an amine functionality of two or more. A composition, such as an oil based drilling fluid, includes the reaction product of a carboxylic acid with at least two carboxylic moieties and a polyamine having an amine functionality of two or more.

L'invention porte sur un procédé consistant à fournir un profil rhéologique sensiblement constant d'un fluide de forage sur une plage de température d'environ 120°F à environ 40°F. Ce procédé comprend l'addition au fluide de forage d'un additif pour fluide de forage, l'additif pour fluide de forage comprenant le produit de réaction d'un acide carboxylique avec au moins deux fractions carboxyliques et une polyamine ayant une fonctionnalité amine d'au moins deux. Une composition, telle qu'un fluide de forage à base d'huile, comprend le produit de réaction d'un acide carboxylique avec au moins deux fractions carboxyliques et une polyamine ayant une fonctionnalité amine d'au moins deux.

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