Lightweight and compact subsea intervention package and method

Details Lightweight and compact subsea intervention package and method Lightweight and compact subsea intervention package and method

2004-06-16

2009-08-25

Beach, Thomas A. (Department: 3671)

Wells

Submerged well

With safety or emergency shutoff

C166S361000, C166S344000

Reexamination Certificate

active

07578349

ABSTRACT:
The present invention discloses apparatus and methods for a lightweight subsea intervention package that may be installed using vessels with a smaller lifting capacity than semi-submersible platforms so that the subsea intervention package can be transported, installed, and removed from a subsea well in less time and with less cost. In one embodiment, the present invention comprises a lower riser package for controlling the subsea well which utilizes two hydraulically activated gate valves. An emergency disconnect package is secured to the lower riser package utilizing a disconnect mechanism. The emergency disconnect package is operable to seal the bottom of a riser if the disconnect mechanism is activated to thereby minimize environmental leakage of fluid from the riser.

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