Boring or penetrating the earth – Below-ground impact members – Fluid-operated
Reexamination Certificate
2008-03-25
2008-03-25
Bagnell, David (Department: 3676)
Boring or penetrating the earth
Below-ground impact members
Fluid-operated
C175S293000, C166S178000
Reexamination Certificate
active
11241040
ABSTRACT:
A jar for use in a downhole environment comprises an hydraulic timing device which allows pressure to be controllably increased to a desired level and, on firing, a near-instantaneous release of that pressure, and which allows for selective bi-directional firing of the jar.
REFERENCES:
patent: 4023630 (1977-05-01), Perkin et al.
patent: 4754821 (1988-07-01), Swietlik
patent: 5318139 (1994-06-01), Evans
patent: 5647446 (1997-07-01), Wenzel
patent: 6202767 (2001-03-01), Friis
Bagnell David
Bomar Shane
McConnell R. Perry
O'Neil & McConnell, PLL.
LandOfFree
Hydraulic timing device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic timing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic timing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3951194