Electronic blast control system for downhole well operations

Details Electronic blast control system for downhole well operations Electronic blast control system for downhole well operations

1994-01-24

1994-11-29

McElheny, Jr., Donald E.

Boots, shoes, and leggings

175 454, E21B 431185

Patent

active

053695798

ABSTRACT:
A method and apparatus for safely controlling detonation of a downhole explosive energized device which ensures that the explosive can be detonated in a well bore only when downhole hydrostatic pressure and well fluid temperature are within limits reflecting location of the explosive energized device at designed depth for accurate positioning relative to a selected formation. The apparatus further employs a clock/timer circuit and a motion sensor circuit to ensure firing of the explosive device only within a predetermined time period and only after having remained stationary within the well casing for a predetermined period of time. The apparatus further includes a memory circuit which receives and stores pressure and temperature data sets correlated with time which reflect well conditions before and after firing of the explosive device. After the tool has been retrieved from the well, this data is copied from the tool memory to a computer memory for subsequent computer processing and display.

REFERENCES:
patent: 4572288 (1986-02-01), Kinley
patent: 4869171 (1989-09-01), Abouav
patent: 4971160 (1990-11-01), Upchurch

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