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Subsea technique for promoting fluid flow

DC
  • US 9,435,185 B2
  • Filed: 12/24/2010
  • Issued: 09/06/2016
  • Est. Priority Date: 12/24/2009
  • Status: Active Grant
First Claim
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1. A method of recovering a pipeline fluid from a source of the pipeline fluid located in a subsea environment comprising the steps of:

  • positioning a fluid powered motor and a pump in the subsea environment;

    connecting the pump to the source of the pipeline fluid with one or more conduits, wherein the source of the pipeline fluid consists of a pipeline, a pipeline end termination, a producing well, a pipeline and a pipeline end termination, or a pipeline and a producing well;

    connecting a separator to the source of the pipeline fluid with a pipeline conduit of the one or more conduits;

    connecting the separator to the pump with a first fluid conduit of the one or more conduits;

    communicating pressurized seawater from a water surface through a seawater conduit into the fluid powered motor to actuate the fluid powered motor;

    discharging the pressurized seawater from the fluid powered motor into the subsea environment;

    driving the pump with the fluid powered motor to decrease pressure in at least the first fluid conduit and the pipeline conduit of the one or more conduits for removing or acting on a blockage in the pipeline fluid to result in a flow or an increased flow of the pipeline fluid from the source of the pipeline fluid; and

    pumping a liquid portion of the pipeline fluid with the pump through a second fluid conduit to the water surface.

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