Drilling method and measurement-while-drilling apparatus and...

Details Drilling method and measurement-while-drilling apparatus and... Drilling method and measurement-while-drilling apparatus and...

E - Fixed Constructions

21

B

E21B 7/00 (2006.01) E21B 4/14 (2006.01) E21B 47/18 (2006.01)

Patent

CA 2351270

A downhole drilling method comprises producing pressure pulses in drilling fluid using measurement-while- drilling (MWD) apparatus (18) and allowing the pressure pulses to act upon a pressure responsive device (16) to create an impulse force on a portion of the drill string.

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