Down hole pressure/temperature gage connect/disconnect method an

Details Down hole pressure/temperature gage connect/disconnect method an Down hole pressure/temperature gage connect/disconnect method an

1977-05-20

1979-06-05

Birmiel, Howard A.

Communications: electrical

Selective

Interrogation response

166250, 175 50, 340 18P, 340 16C, G01V 140, E21B 2706

Patent

active

041575350

ABSTRACT:
A method and an apparatus for connecting a gage to an oil well pump power cable for transmitting pressure and temperature data to a surface recorder whereby the gage can be selectively disconnected when it is desired to test the insulation integrity of the pump power supply system, and selectively connected when the test is completed. The gage is connected to the neutral point of the three phase motor winding through a latching relay. A code transmitter generates a frequency coded signal on the power cable to a decoder which controls the relay. The same coded signal is utilized to open and close the relay contacts as desired.

REFERENCES:
patent: 3284669 (1966-11-01), Boyd
patent: 3293607 (1966-12-01), Kalbfell
patent: 3638174 (1972-01-01), Haase
patent: 3723956 (1973-03-01), Carman
patent: 3737845 (1973-06-01), Maroney et al.
patent: 3742440 (1973-06-01), Ehrlich et al.
patent: 3959767 (1976-05-01), Smither et al.
patent: 3991611 (1976-11-01), Marshall et al.

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