FIRING DEVICE WITH A VIEW TO BELOW GROUND COMBUSTION STARTING

摘要

The initiator comprises a casing housing a support made of electrical insulation material. A helicoidal channel accommodates wound resistive wire with an electrochemical cable. A spring-loaded contactor and an insulated spacer are also fitted, to permit initiation in zones where there are porous or fissured strata contg. liq. hydrocarbons for underground combustion.