Method and apparatus for oil well measurements

Details Method and apparatus for oil well measurements Method and apparatus for oil well measurements

E - Fixed Constructions

21

B

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E21B 49/00 (2006.01) E21B 23/00 (2006.01) E21B 34/14 (2006.01) E21B 47/06 (2006.01) E21B 49/08 (2006.01)

Patent

CA 1227417

PATENT APPLICATION ETUDES ET FABRICATIONS FLOPETROL METHOD AND APPARATUS FOR OIL WELL MEASUREMENTS In a drill string or production tubing is inserted a body member (100). This body member has a flapper valve (121) actuated by a jacket (130) itself controlled by a control unit (200) lowered at the end of a cable (199). The control unit has an internal rod (251) with a pressure gage (252) at the head as well as an external tube (201) in which the rod (251) slides. The tube (201) is anchored on the body member (100) and the rod (251) on the jacket (130). A large passage (140) goes around the two anchoring points. A small tubular passage (150) makes it possible to link the upstream part of the flapper valve (121) to the rod (251) and, from there, to the pressure gage. Figure 1.

458573

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