Toroidal coupled telemetry apparatus

Details Toroidal coupled telemetry apparatus Toroidal coupled telemetry apparatus

1984-01-18

1985-06-25

Moskowitz, Nelson

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

340855, 33312, 175 50, G01V 140

Patent

active

045257159

ABSTRACT:
A logging telemetering system comprising a toroidal coupled telemetry apparatus including a primary winding carrying bore hole data, wrapped around at last one torroid core mounted within a drill collar. The toroid core is further wrapped with at least one secondary turn which is connected to the drill collar for enhancing the efficiency of inducing a current carrying the borehole data in the drill string for transmission to the surface. One half turn of the secondary winding is provided by an insulated portion of the drill collar, and the balance of the secondary winding is composed of an electrically conductive strap wound around the toroid core.

REFERENCES:
patent: 2354887 (1944-08-01), Silverman et al.
patent: 2379800 (1945-07-01), Hare
patent: 2389241 (1945-11-01), Silverman
patent: 2411698 (1946-11-01), Silverman et al.
patent: 2414719 (1947-01-01), Cloud
patent: 3186222 (1965-06-01), Martin
patent: 4302757 (1981-11-01), Still

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