초록 ▼

A downhole seismic acoustical signal source capable of selectively firing numerous, prewired explosive charges. The downhole seismic source uses a self-contained firing circuit that is capable of receiving select and fire signals from a seismic crew at the ground surface through a standard seven con

A downhole seismic acoustical signal source capable of selectively firing numerous, prewired explosive charges. The downhole seismic source uses a self-contained firing circuit that is capable of receiving select and fire signals from a seismic crew at the ground surface through a standard seven conductor wireline cable to detonate the explosive charges. The downhole seismic source is capable of generating numerous signals in a given downhole trip through the firing of many individual explosive charges.

대표청구항 ▼

An apparatus for generating a downhole seismic source, said apparatus comprising: a capacitor; a firing switch connected in series with the capacitor and in series with a plurality of parallel field effect transistor switches; a plurality of explosive charges connected in a series electrical arrange

An apparatus for generating a downhole seismic source, said apparatus comprising: a capacitor; a firing switch connected in series with the capacitor and in series with a plurality of parallel field effect transistor switches; a plurality of explosive charges connected in a series electrical arrangement to the firing switch and to the plurality of parallel field effect transistor switches; a serial interface control for producing a binary coded command in response to a control signal; means for receiving the binary coded command and activating at least one of the field effect transistor switches, whereby the plurality of explosive charges may be detonated in a sequence controlled from a remote location; and a protective housing in which are mounted the capacitor, the firing switch, the field effect transistor switches, the serial interface control, and the means for receiving the binary coded command and activating at least one of the field effect transistor switches.