Method and means for transmitting data through a drill...

Details Method and means for transmitting data through a drill... Method and means for transmitting data through a drill...

E - Fixed Constructions

21

B

255/1

E21B 47/12 (2006.01) E21B 4/02 (2006.01) E21B 41/00 (2006.01) E21B 47/18 (2006.01)

Patent

CA 1201428

A B S T R A C T METHOD AND MEANS FOR TRANSMITTING DATA THROUGH A DRILL STRING IN A BOREHOLE Data are transmitted through a column of drilling fluid in a drill string that is being applied in drilling a borehole in an underground formation. The data are in the form of pressure waves (such as pressure pulses) and are generated by means of a down-hole liquid motor that is driven by the drilling fluid. The pressure waves are generated by varying the load on the liquid motor according to a predetermined pattern that is representative of the data to be transmitted.

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