Multishot downhole explosive device as a seismic source

Patent · Tue Jan 23 00:00:00 EST 1990

OSTI ID:7017756

Chen, S T; Eriksen, E A; Miller, M A; Murray, T J

The patent describes an apparatus for generating a downhole seismic source. The 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.

• Assignee: Exxon Production Research Co., Houston, TX
• Patent Number(s): US 4895218; A
• Application Number: PPN: US 7-261957A
• OSTI ID: 7017756
• Resource Relation: Patent File Date: 24 Oct 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
58 GEOSCIENCES
BOREHOLES
SEISMIC DETECTORS
CONTROL SYSTEMS
DRILLING EQUIPMENT
FIELD EFFECT TRANSISTORS
SEISMIC SOURCES
SEISMIC SURVEYS
CAVITIES
EQUIPMENT
GEOPHYSICAL SURVEYS
MEASURING INSTRUMENTS
SEISMIC ARRAYS
SEMICONDUCTOR DEVICES
SURVEYS
TRANSISTORS
020200* - Petroleum- Reserves
Geology
& Exploration
426000 - Engineering- Components
Electron Devices & Circuits- (1990-)
580000 - Geosciences