Cement port closure sleeve for a subsea well

Details Cement port closure sleeve for a subsea well Cement port closure sleeve for a subsea well

1992-03-24

1993-07-13

Britts, Ramon S.

Wells

Processes

Cementing, plugging or consolidating

166 87, 166 89, 166186, 166382, E21B 3304

Patent

active

052264785

ABSTRACT:
A subsea well assembly has a cement port closure sleeve which opens and closes a cement port in an outer wellhead housing. The outer wellhead housing secures to conductor pipe. An inner wellhead housing is lowered into the outer wellhead housing before the well is drilled past the conductor pipe, and without having any casing secured to the inner wellhead housing. The sleeve opens and closes an inner return port that extends through the inner wellhead housing and which registers with the outer return port once the inner wellhead housing is in place. Drilling through the inner wellhead housing takes place with the sleeve closed. Subsequently, when casing is run, the casing hanger will engage the sleeve and move it to an open position. This allows cement returns to flow out the inner and outer return ports.

REFERENCES:
patent: 2118094 (1938-05-01), McDonough et al.
patent: 2157496 (1939-05-01), Penick et al.
patent: 3087547 (1963-04-01), Raulins et al.
patent: 3548934 (1970-12-01), Hutchison
patent: 3625283 (1971-12-01), Ahlstone
patent: 3638725 (1972-02-01), Ahlstone
patent: 3827488 (1974-08-01), Piazza et al.
patent: 4449583 (1984-05-01), Lawson
patent: 4736799 (1988-04-01), Ahlstone
patent: 4928769 (1990-05-01), Milberger et al.
patent: 5092401 (1992-02-01), Heynen

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