07639781 is referenced by 9 patents and cites 19 patents.

An x-ray tool for determining a characteristic of an oilfield fluid. The tool may include a generator portion housing a collimator about a target from which x-rays are emitted. In this manner x-rays may be attenuated right at the target such that a majority of shielding otherwise necessary for safety concerns may be eliminated. Rather, by employing the target within the collimator, shielding of the generator may be limited to a single shielding plate within the generator portion that is positioned parallel to the target at the opposite end of an x-ray tube therebetween. As a result of this configuration, an x-ray tool for analysis of oilfield fluids may be provided with a minimum weight of shielding material. Thus, hand-held user friendly embodiments may be safely employed at the oilfield.

Title
X-ray tool for an oilfield fluid
Application Number
12/16330
Publication Number
7639781 (B2)
Application Date
January 18, 2008
Publication Date
December 29, 2009
Inventor
Peter Wraight
Skillman
NJ, US
Etienne Vallee
Princeton
NJ, US
Anthony Durkowski
Lawrenceville
NJ, US
Joel L Groves
Leonia
NJ, US
Rod Shampine
Houston
TX, US
Agent
Robin Nava
David Cate
Michael Flynn
Assignee
Schlumberger Technology Corporation
TX, US
IPC
G01V 5/12
G21K 1/02
H01J 35/08
G01B 15/02
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