METHOD AND APPARATUS FOR OIL WELL MEASUREMENTS

摘要

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.