Measuring and testing – Borehole or drilling – Downhole test
Patent
1986-07-25
1988-08-16
Levy, Stewart J.
Measuring and testing
Borehole or drilling
Downhole test
200 82R, E21B 4400
Patent
active
047635193
ABSTRACT:
The invention comprises a pressure actuated switch which is actuated when the inlet port of the device is exposed to a preselected pressure. A piston size, and one or more shear pins, is selected for the desired operating pressure, the piston area being inversely proportional to the desired operating pressure. Shear pins are preferably of one size and material. When the desired operating pressure is applied, the force of the piston causes the shear pin to shear thereby allowing an electrical contact to complete an electrical circuit and initiate operation of a selected device such as a recorder, perforating gun, etc. If a single shear pin is used, with any selected piston and desired operating pressure, the shear force applied is a constant; i.e., for any given operating pressure and selected piston size with a single shear pin, the applied shear force is the same. If two shear pins are required, the applied shear force is doubled. This apparatus provides a switch which will operate over a wide pressure range (approximately 3,500-20,000 psi) with a high degree of accuracy and reliability.
REFERENCES:
patent: 2265098 (1941-12-01), Bettis
patent: 2543823 (1951-03-01), Barry
patent: 3223184 (1965-12-01), Jones et al.
patent: 3275769 (1966-09-01), Weaver
patent: 3391263 (1968-07-01), Young
patent: 3441093 (1969-04-01), Boop
patent: 3860068 (1975-01-01), Abney et al.
patent: 3896667 (1975-07-01), Jeter
patent: 3908453 (1975-09-01), Jeter
patent: 4266613 (1981-05-01), Boop
Levy Stewart J.
NL Sperry-Sun of Canada, Ltd.
O'Shea Kevin D.
LandOfFree
Pressure actuator switch 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 actuator switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure actuator switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-593361