Underwater well completion method and apparatus

Wells – With below and above ground modification – Eduction pump or plunger in well

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Details

175 7, 285 87, E21B 4301

Patent

active

039748758

ABSTRACT:
Extended casing method and apparatus for completing an underwater well whereby complete and continuous pressure control is maintained at the surface drilling platform. A conductor casing is installed in the floor of a body of water with a casing head and riser attached near the floor. Other casing is installed and supported at the water floor by hanger heads and having other risers extending upwardly therefrom. Pressure control equipment is installed at the upper end of one of the risers. An innermost casing having a tubing hanger-head attached is lowered through the pressure control equipment and installed. An orientation sleeve is aligned with the tubing hanger-head to properly orient the tubing hanger. The tubing hanger and tubing, is then passed through the pressure control equipment and the innermost riser, to which the pressure control equipment is attached and is lowered to engage the orientation sleeve for proper alignment with the innermost hanger-head and remotely latched thereto. All seals are then pressure tested. The tubing is plugged, the riser and control equipment removed and a Christmas tree adapter connected to the tubing hanger-head. A Christmas tree assembly is then attached to the adapter in fluidtight flow communication with the tubing string.

REFERENCES:
patent: 314783 (1885-03-01), Beebe
patent: 2228243 (1941-01-01), Baker
patent: 2645438 (1953-07-01), Kalikow
patent: 2893694 (1959-07-01), Waggener
patent: 3098667 (1963-07-01), Greenwood
patent: 3315742 (1967-04-01), Nicolson
patent: 3442536 (1969-05-01), Fowler

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