Apparatus for production in oil wells

摘要

The present invention discloses an apparatus that uses at least one injection pump ( 9 ) positioned in proximity to a subsea petroleum well ( 10 ) to provide hydraulic fluid for hydraulic pumping equipment positioned in the bottom of the well, in order to cause a flow of produced oil. The injection pump ( 9 ) is able to suck hydraulic fluid from a tank of hydraulic fluid ( 8 ) positioned on the deck of a service unit ( 40 ). Alternatively, injection pump ( 9 ) is able to utilize water from the sea as a hydraulic fluid. Alternatively, the injection pump ( 9 ) may be integral with a Christmas tree ( 6 ) or may be installed in an auxiliary well ( 90 ) in order that its external portion does not enter into contact with seawater.