Downhole recorder for use in wells

Details Downhole recorder for use in wells Downhole recorder for use in wells

1985-06-04

1987-04-28

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

166 66, 166 551, 175 456, 175 40, E21B 4700

Patent

active

046606386

ABSTRACT:
Method and apparatus for recording data downhole in a borehole. A recorder having a data memory is lowered into a data recording position in the borehole. A signal is transmitted downhole into the borehole and the recorder is initiated to begin recording data at an ascertainable memory location of the data memory in response to a downhole stimulus produced in response to the transmitted signal. Also, a downhole recorder for use in detecting the firing of an explosive device downhole in a borehole is provided. After an attempt is made to actuate the explosive device, the recorder is retrieved to the surface where the contents of its memory are analyzed to determine whether the explosive device has been actuated.

REFERENCES:
patent: 4006777 (1977-02-01), LaBauve
patent: 4033186 (1977-07-01), Bresie
patent: 4208966 (1980-06-01), Hart
patent: 4324310 (1982-04-01), Werner et al.
patent: 4478294 (1984-10-01), Summer
patent: 4480690 (1984-11-01), Vann
patent: 4483397 (1984-11-01), Gray
patent: 4593771 (1986-06-01), Comeau
patent: 4598771 (1986-07-01), Vann

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