Pressure pulse generator for MWD

Details Pressure pulse generator for MWD Pressure pulse generator for MWD

2006-06-06

2006-06-06

Horabik, Michael (Department: 2635)

Communications: electrical

Wellbore telemetering or control

Pulse or digital signal transmission

C367S083000, C367S085000

Reexamination Certificate

active

07057524

ABSTRACT:
A pressure pulse generator to generate pressure signals in drilling fluid for transmission to surface includes an outer housing having an inlet and an outlet for supply to the drilling assembly; a control element slidably mounted in the housing for opening and closing said inlet, the element being operative to generate a pressure pulses when it closes; a control passage extending through the element and closable by a valve element arranged to be exposed to the pressure in the passage; and an actuator assembly connected to the control element. The control element moves upon activation relative to the inlet to generate a pulse. When deactivated, it blocks the flow through the passage so that all of the fluid bypasses via the inlet.

REFERENCES:
patent: 4550392 (1985-10-01), Mumby
patent: 4742498 (1988-05-01), Barron
patent: 5802011 (1998-09-01), Winters et al.
patent: 6016288 (2000-01-01), Frith
patent: 6089332 (2000-07-01), Barr et al.
patent: 2328459 (1999-02-01), None
patent: 2360800 (2001-10-01), None

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