Drilling fluid additive and method for improving lubricity...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/035 (2006.01) E21B 21/14 (2006.01)

Patent

CA 2692081

The present invention relates to a drilling fluid additive for improving lubricity or rate of penetration (ROP) in a drilling operation, such as an oil and gas drilling operation. The additive comprises particles of wax or waxy substance, or a mixture of two or more types of said particles having distinct properties, such as particle size, type of wax or waxy substance, melt point, solubility, dissolution rate, hardness, shape, blocking ability, or a combination thereof. In certain embodiments, the additive is environmentally friendly and biodegradable. The invention also relates to a drilling fluid comprising the drilling fluid additive of the invention. A method of improving lubricity or increasing ROP in a drilling operation is also provided, as well as a use of particles of wax or waxy substance or mixture thereof as a drilling fluid additive for improving lubricity or increasing ROP in a drilling operation.

La présente invention concerne un additif pour fluide de forage destiné à améliorer la lubrification ou le taux de pénétration (ROP) lors d'une opération de forage, par exemple une opération de forage pétrolier et gazier. L'additif comprend des particules de cire ou de substance cireuse ou un mélange de deux types ou plus desdites particules ayant des propriétés distinctes, telles que la taille de particule, le type de cire ou de substance cireuse, le point de fusion, la solubilité, le taux de dissolution, la dureté, la forme, la capacité de blocage ou une combinaison de ces propriétés. Selon certains modes de réalisation, l'additif est respectueux de l'environnement et biodégradable. L'invention concerne également un fluide de forage qui comprend l'additif pour fluide de forage de l'invention. L'invention concerne également un procédé d'amélioration de la lubrification ou d'augmentation du ROP lors d'une opération de forage, ainsi que l'utilisation de particules de cire ou de substance cireuse ou leur mélange en tant qu'additif pour fluide de forage afin d'améliorer la lubrification ou d'augmenter le ROP lors d'une opération de forage.

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