X-ray or gamma ray systems or devices – Source
Reexamination Certificate
2009-07-15
2010-10-19
Kiknadze, Irakli (Department: 2882)
X-ray or gamma ray systems or devices
Source
C378S054000
Reexamination Certificate
active
07817781
ABSTRACT:
An apparatus and method for determining the density and other properties of a formation surrounding a borehole using a high voltage x-ray generator. One embodiment comprises a stable compact x-ray generator capable of providing radiation with energy of 250 keV and higher while operating at temperatures equal to or greater than 125° C. In another embodiment, radiation is passed from an x-ray generator into the formation; reflected radiation is detected by a short spaced radiation detector and a long spaced radiation detector. The output of these detectors is then used to determine the density of the formation. In one embodiment, a reference radiation detector monitors a filtered radiation signal. The output of this detector is used to control at least one of the acceleration voltage and beam current of the x-ray generator.
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Becker Arthur J.
Groves Joel L.
Stoller Christian
Wraight Peter
Flores Jonna
Fonseca Darla
Kiknadze Irakli
Rutherford Charlotte
Schlumberger Technology Corporation
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