Safety switch for explosive well tools

Details Safety switch for explosive well tools Safety switch for explosive well tools

1990-02-22

1990-10-30

Cusick, Ernest G.

Electricity: circuit makers and breakers

Electric switch details

Actuators

89 1015, 200 61069, 200 51010, 200336, 200570, 166 55001, 175 4056, 175 2, 361 62, E21B 43116, F42C 1500, H01H 3538

Patent

active

049670484

ABSTRACT:
In accordance with illustrative embodiments of the present invention as disclosed herein, a safety switch for preventing accidental firing of an explosive well tool includes a tubular metal body connected between the cable head and the well tool, a conductor wire extending through such body for carrying current from the cable to the well tool, and a contact plug mounted in a slide opening in the body and arranged to be selectively advanced into shorting contact with the conductor wire.

REFERENCES:
patent: 2785631 (1957-03-01), Blanchard
patent: 2837995 (1958-06-01), Castel
patent: 3168141 (1965-02-01), Lebourg
patent: 3758731 (1973-09-01), Vann et al.
patent: 4011815 (1977-03-01), Garcia
patent: 4154302 (1979-05-01), Cugini
patent: 4266613 (1981-05-01), Boop
patent: 4314614 (1982-02-01), McPhee et al.
patent: 4523650 (1985-06-01), Sehnert et al.
patent: 4561356 (1985-12-01), Bordon

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