Measuring and testing – Borehole or drilling – Downhole test
Patent
1980-12-22
1982-12-28
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
318490, 337333, E21B 4700
Patent
active
043655068
ABSTRACT:
A remotely controlled switching apparatus for selectively controlling the connection of a downhole device to a power cable which carries power to a downhole motor includes a thermostatic switch connected between the device and the cable, and a heater for producing sufficient heat to raise the temperature of the switch above its operating temperature. The heater is operated by a switching signal impressed upon the cable by a control and readout unit on the surface. The apparatus may be used to disconnect the device from the cable for a predetermined period of time to enable high voltage testing. After the predetermined period of time, the apparatus automatically reconnects the device to the cable.
REFERENCES:
patent: 2073585 (1937-03-01), Parissi
patent: 2263389 (1941-11-01), Koenig
patent: 2287164 (1942-06-01), Bowsher
patent: 2305862 (1942-12-01), Gilliver et al.
patent: 2357995 (1944-09-01), Blomberg et al.
patent: 2622170 (1952-12-01), Van Toorn
patent: 3021520 (1962-02-01), Weber
patent: 3171116 (1965-04-01), Conigliaro
patent: 3284669 (1966-11-01), Boyd
patent: 4178579 (1979-12-01), McGibbeny et al.
Myracle Jerry W.
TRW Inc.
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