Measuring and testing – Borehole or drilling – Downhole test
Reexamination Certificate
2007-03-06
2007-03-06
Larkin, Daniel S. (Department: 2856)
Measuring and testing
Borehole or drilling
Downhole test
C073S152620, C073S168000
Reexamination Certificate
active
11126715
ABSTRACT:
The outlet pressure of a pump that fluctuates rapidly, as is typical of high pressure multiplex pumps, is sensed in a pressure line leading from the main flow line to a damping mechanism. The damping mechanism comprises a pair of small spaced openings, which are preferably adjustable in size. The damping mechanism is ideally a pair of needle valves placed in series so the pressure downstream of the second needle valve fluctuates considerably less than upstream of the first needle valve. The damped pressure is sensed to provide an input to real time graphs showing various pertinent pressure measurements involving the application of pressure, e.g. to monitor downhole tools in hydrocarbon wells. The downhole tools may be fluid driven motors, whipstocks, packers, wiper plugs and the like. In the case of fluid driven or mud motors, a base line pressure taken when the motor is idling is compared to the pressure when the motor is drilling to detect the onset of motor stall.
REFERENCES:
patent: 3749185 (1973-07-01), Tiraspolsky et al.
patent: 4297880 (1981-11-01), Berger
patent: 6109367 (2000-08-01), Bischel et al.
patent: 6421298 (2002-07-01), Beattie et al.
Butler T. Glen
Butler Thomas L.
Larkin Daniel S.
Moller G. Turner
LandOfFree
Pressure monitoring technique for downhole tools does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure monitoring technique for downhole tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure monitoring technique for downhole tools will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3795629