Patent ID: 7594543

Claim:
An apparatus for the production of a subsea petroleum well wherein fluids originating from a reservoir flow toward the interior of said petroleum well, said well comprising: a Christmas tree; a casing whose upper end is connected to said Christmas tree; a production tubing installed in the interior of said casing whose upper end is connected to said Christmas tree; hydraulic pumping device connected to the lower end of said production tubing; said apparatus characterized by: first injection pumping device connected to a source of supply of hydraulic fluid, said first injection pumping device positioned in the interior of said petroleum well) in order to provide hydraulic fluid to said hydraulic pumping device; a hydraulic fluid injection tubing, which connects the discharge of said first injection pumping device to said hydraulic pumping device; wherein, said hydraulic fluid provided by said first injection pumping device to said hydraulic pumping device causes a pumping effect, in the interior of said production tubing on the fluids, originating from the reservoir, in the direction of said Christmas tree.