Multi-gradient drilling method and system

E - Fixed Constructions – 21 – B

Patent

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

Patent

CA 2412417

A multi-gradient system for drilling a well bore from a surface location into a seabed includes an injector for injecting buoyant substantially incompressible articles into a column of drilling fluid associated with the well bore. Preferably, the substantially incompressible articles comprises hollow substantially spherical bodies.

L'invention concerne un système à gradients multiples utile pour forer des puits à partir d'un emplacement de surface dans un fond marin. Le système comprend un injecteur destiné à injecter des articles flottants sensiblement incompressibles dans une colonne de fluide de forage associée au puits. De préférence, les articles sensiblement incompressibles comportent des corps creux sensiblement sphériques.

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