E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/2
E21B 47/06 (2006.01) G01L 7/00 (2006.01) G01L 19/06 (2006.01)
Patent
CA 1305405
Abstract of the Disclosure A housing which is connectible to a pressure sensitive tool has a filter cartridge mounted within it to communicate a pressure from an external fluid to a clean fluid contained within the filter cartridge and the tool. The filter car- tridge includes one or more filters having a plurality of passageways small enough to hold the clean fluid under pres- sure equilibrium conditions, but large enough to communicate pressure from the external fluid to the clean fluid. There are enough of such passageways so that it is unlikely that all will become clogged by any contaminants within the external fluid should a portion of the external fluid be sucked in through the filter in response to expansion and contraction phenomena of the clean fluid.
560487
Dennis John Robert
White Billy W.
Haliburton Company
Swabey Ogilvy Renault
LandOfFree
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