Shale inhibition additive for oil/gas down hole fluids and...

Details Shale inhibition additive for oil/gas down hole fluids and... Shale inhibition additive for oil/gas down hole fluids and...

C - Chemistry, Metallurgy

09

K

C09K 8/18 (2006.01) C09K 8/22 (2006.01) C09K 8/54 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2528014

An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclosed including the step of circulating a drilling fluid including an effective amount of a choline salt to reduce reactive shale and/or clay swelling during under-balanced drilling operations.

Le présent document concerne un additif de fluide de forage en sous-pression qui réduit le schiste argileux réactif et/ou le gonflement des argiles lors des opérations de forage en sous-pression. L'additif inclut une quantité efficace de sel de choline. Le document traite également d'une méthode de forage en sous-pression prévoyant une étape de mise en circulation d'un fluide de forage comprenant une quantité efficace de sel de choline visant à réduire le schiste argileux réactif et/ou le gonflement des argiles lors des opérations de forage en sous-pression.

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