Method for drilling and cementing a well

Details Method for drilling and cementing a well Method for drilling and cementing a well

E - Fixed Constructions

21

B

E21B 33/13 (2006.01) C04B 28/08 (2006.01) C09K 8/26 (2006.01) E21B 3/00 (2006.01) E21B 7/20 (2006.01)

Patent

CA 2147493

A borehole is drilled utilizing an oil-in-water emulsion drilling fluid, optionally containing blast furnace slag. A compati- ble cementitious slurry containing blast furnace slag and an activator system is then introduced into the borehole and displaced up into an annulus. Generally, the cementitious slurry is prepared by adding additional blast furnace slag and an activator such ¦ as a sodium hydroxide/sodium carbonate mixture to the used drilling fluid.

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