Gulf Canada Corporation

Lubrizol Oilfield Solutions, Inc.

Weatherford/lamb, Inc.

Stuart Dwight Butler

Gregg Mackay Jollymore

Daniel Guy Pomerleau

Gregg MacKay Jollymore

Keith Kenneth Corb

Robert T Staysko

In one embodiment, a method for drilling a wellbore includes injecting drilling fluid through a drill string disposed in the wellbore and rotating a drill bit disposed on a bottom of the drill string. The drilling fluid includes a liquid and a gas. The drilling fluid is injected at the surface. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The drilling fluid and cuttings (returns) flow to the surface via an annulus formed between the drill string and the wellbore. The liquid is injected at a rate so that a liquid velocity of the returns in the annulus is sufficient to transport the cuttings. The method further includes drilling through at least a portion of a non-productive formation.

Multiphase drilling systems and methods

An improved stabilizer for use in stabilizing both drill collars and other sections on a drill string is disclosed. The stabilizer has at least three circumferentially spaced helical blades which have a tapered portion at each end and a cylindrical portion therebetween, each blade overlapping the adjacent blade within each tapered portion as well as within the cylindrical portion.

Stabilizer for drillstems

Growing community of inventors

Calgary, Canada

Stuart Dwight Butler