Lost circulation additive for drilling fluids

Details Lost circulation additive for drilling fluids Lost circulation additive for drilling fluids

C - Chemistry, Metallurgy

09

K

C09K 8/60 (2006.01) C09K 8/035 (2006.01)

Patent

CA 2581360

Additive for a drilling fluid to block drilling-induced or pre-existing rock fractures comprising polymeric granules with a diameter distribution peak between 1000 and 200 microns and an average resiliency of at least 10 % rebound after compression by a load of 200 N and uses thereof.

La présente invention concerne un additif pour boue de forage utilisé pour bloquer les fractures de roches induites par le forage ou pré-existantes, comprenant des granules polymères présentant un pic de distribution des diamètres compris entre 1 000 et 200 microns et une résilience moyenne d'au moins 10 % de rebondissement après compression par une charge de 200 N. L'invention porte également sur les utilisations dudit additif.

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