Apparatus and method for controlling the viscosity or the...

E - Fixed Constructions – 21 – B

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E21B 21/06 (2006.01)

Patent

CA 2624751

A method for controlling viscosity (or density) of drilling fluid containing solids, said drilling fluid circulating in a drilling fluid system, which method comprises the steps of: (a) feeding drilling fluid into a container (16); (b) sensing with a viscosity (or density) sensor (19) a viscosity (or density) of drilling fluid in said container (16) and providing a viscosity (or density) signal representative thereof; (c) in response to said viscosity (or density) signal pumping a portion of said drilling fluid to a solids separation apparatus (40); (d) separating with said solids separation apparatus (40) at least some of the solids from said portion of drilling fluid; and (e) returning to said drilling fluid system drilling fluid and/or solids separated in step (d) to adjust the viscosity (or density) of said drilling fluid in said container (16).

L'invention concerne un procédé de contrôle de la viscosité (ou de la densité) d'un fluide de forage chargé de solides, ce fluide de forage circulant dans un système de fluide de forage. Ce procédé consiste à: (a) introduire un fluide de forage dans un conteneur (16); (b) déteminer, à l'aide d'un détecteur de viscosité (ou de densité) (19), la viscosité (ou la densité) du fluide de forage dans le conteneur (16) et produire un signal de viscosité (ou de densité) correspondant; (c) en réponse au signal de viscosité (ou de densité), pomper une partie du fluide de forage vers un dispositif de séparation de solides (40); (d) séparer, à l'aide du dispositif de séparation de solides (40), au moins certains des solides de ladite partie du fluide de forage; et enfin, (e) renvoyer au système de fluide de forage le fluide de forage et/ou les solides séparés en (d) pour régler la viscosité (ou la densité) dudit fluide de forage dans le conteneur (16).

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