Downhole recorder for use in wells

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

E - Fixed Constructions

21

B

166/10, 166/2

E21B 47/00 (2006.01) E21B 43/1185 (2006.01) E21B 47/06 (2006.01) E21B 47/12 (2006.01)

Patent

CA 1254500

ABSTRACT OF THE DISCLOSURE 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.

518862

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