E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/16 (2006.01) E21B 23/08 (2006.01) E21B 33/068 (2006.01) E21B 43/12 (2006.01) F04B 47/12 (2006.01) F04F 1/08 (2006.01)
Patent
CA 2158514
Two production springs extend downwardly from a well head of an oil well to a point adjacent a producing region. Lower ends of the two production strings are connected by a coupling which allows a mechanical interface launched adjacent the well head of one of the production strings to descend along the production string through the coupling and upwardly through the other production string to displace oil from the production strings to a surge tank. High pressure gas is utilized to move the mechanical interface through the production strings and suitable valves are provided for controlling the flow of gas and oil through the production strings.
Gowling Lafleur Henderson Llp
Petroleo Brasileiro S.a. - Petrobras
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