Subsea pump system
AssigneeFramo Developments (UK) Limited
InventorFrank Mohn
Life of this patent
Estimating the term…
Abstract
In a subsea fluid extraction system, the wellhead equipment comprises an X-mas tree on a guide base, the tree having a borethrough which can be run and retrieved a pump unit including an electric motor driving an impeller, the pump unit being suspended from a pump hanger in the X-mas tree by an elongate electrical conductor assembly consisting of concentric tubular conductors with insulating sleeves therebetween. An outer tube spaced around the conductors provides a fluid passage communicating through the pump unit with a second passage within the conductors for circulation of barrier fluid. Electrical supply to the pump unit is effected by a female connector located at the side of the X-mas tree which mates with an upright connector element on a transformer on the guide base.
Claims19
In a subsea fluid extraction system, wellhead equipment comprising:
- an X-mas tree having a bore extending therethrough,
- elongate conductor means comprising a plurality of tubular conductors,
- an electrically powered pump unit suspended by said elongated conductor means, said pump unit and said elongate conductor means being adapted to be run and retrieved through said bore,
- hanger means in said X-mas tree engaged by said elongate conductor means for supporting said pump unit from said X-mas tree, and
- electrical connector means included in said hanger means electrically communicating each of said plurality of tubular conductors externally of said X-mas tree.
Wellhead equipment for a subsea fluid extraction system, comprising:
- a guide base,
- an X-mas tree retrievably mounted on said guide base and having a bore extending therethrough,
- elongate conductor means,
- an electrically powered pump unit suspended by said elongate conductor means, said pump unit and said elongate conductor means being adapted to be run and retrieved through said bore,
- hanger means in said X-mas tree engaged by said elongate conductor means whereby said pump unit is suspended from said X-mas tree by way of said elongate conductor means,
- first electrical connector means within said X-mas tree releasably connecting with said elongate conductor means on running of said pump unit,
- an electrical supply source mounted on said guide base adjacent said X-mas tree, and
- second electrical connector means extending laterally from said X-mas tree and releasably electrically connecting said electric supply source with said first electrical connector means, said second connector means being connectable with said supply source and separable therefrom by substantially vertical movement on landing of said X-mas tree on said guide base, and on retrieval of said X-mas tree from said guide base respectively.
A subsea wellhead installation comprising:
- an X-mas tree having a bore extending substantially vertically therethrough,
- an elongate electrical conductor assembly, said assembly comprising a plurality of concentric tubular conductors and at least one sleeve of insulating material between adjacent ones of said tubular conductors.
- a pump unit carried by said conductor assembly at a first end region thereof, said pump unit comprising impeller means and an electric motor driving said impeller means in response to electrical energization of said motor by way of said conductor assembly, said pump unit and said conductor assembly being adapted to be run and retrieved through said bore, and
- means in said X-mas tree releasably mechanically and electrically engaging said conductor assembly at a second end region thereof for suspending and electrically energizing said pump unit from said X-mas tree by means of said conductor assembly.
Dependencies are inferred from the claim text.