Managed pressure drilling

Details Managed pressure drilling Managed pressure drilling

E - Fixed Constructions

21

B

E21B 21/08 (2006.01) E21B 7/00 (2006.01)

Patent

CA 2539266

Embodiments of the present invention include methods and apparatus for dynamically controlling pressure within a wellbore while forming the wellbore. In one aspect, one or more pressure control apparatus are used to maintain desired pressure within the wellbore while drilling the wellbore. In another aspect, pressure is dynamically controlled while drilling using foam to maintain a substantially homogenous foam flow regime within the wellbore annulus for carrying cuttings from the wellbore.

Des réalisations de la présente invention comprennent des méthodes et un appareillage permettant la commande dynamique de la pression dans un puits tout en formant le puits. Selon un aspect, un ou plusieurs appareils de commande de pression sont utilisés pour maintenir une pression désirée dans le puits tout en forant le puits. Selon un autre aspect, la pression est commandée de manière dynamique tout en forant en utilisant une mousse pour maintenir un régime du débit de la mousse essentiellement homogène dans l'espace annulaire du puits pour transporter des déblais de forage provenant du puits.

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