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External Oil Expansion Chamber for Seabed Boosting ESP Equipment

  • US 20100329893A1
  • Filed: 06/28/2010
  • Published: 12/30/2010
  • Est. Priority Date: 06/29/2009
  • Status: Active Grant
First Claim
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1. A method for boosting pressure of well fluid flowing from a subsea well, comprising:

  • mounting a motor and a pump within a subsea conduit;

    providing a submerged expansion housing external of the conduit in a vicinity of a sea floor, the expansion housing having a movable barrier therein, defining a primary and a secondary fluid chamber;

    flowing formation fluid into the conduit around the motor and operating the motor and pump to pump formation fluid from the capsule;

    communicating a dielectric lubricant from the motor with the primary chamber within the expansion chamber;

    communicating formation fluid with the secondary chamber within the expansion chamber; and

    allowing the flexible barrier to move to equalize pressure between the primary and secondary chambers.

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