Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Reexamination Certificate
2006-04-12
2008-09-09
Wong, Albert K (Department: 2612)
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through well fluids
C175S040000, C367S083000
Reexamination Certificate
active
07423932
ABSTRACT:
The poppet portion of a signal valve is driven rotationally by a mud motor and the rotation is used, in conjunction with a rotary-to-linear motion converter, to cause the poppet to move axially relative to a cooperating orifice in response to initiating action from the related down hole instrument. The rotation of the poppet is optionally used to power an alternator to provide electric power for use in the apparatus.
REFERENCES:
patent: 4034833 (1977-07-01), Jeter
patent: 5020609 (1991-06-01), Jerer
patent: 5117398 (1992-05-01), Jeter
patent: 5787052 (1998-07-01), Gardner et al.
patent: 6002643 (1999-12-01), Tchakarov et al.
patent: 2005/0260089 (2005-11-01), Hahn et al.
Jeter John D.
Wong Albert K
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