Combination ball valve and annular pipe seal

Details Combination ball valve and annular pipe seal Combination ball valve and annular pipe seal

1991-12-20

1992-12-01

Britts, Ramon S.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

251 12, 277200, E21B 3303

Patent

active

051672839

ABSTRACT:
A diverter for a riser string between subsea well and offshore drilling rig utilizes a rotatable ball element. The ball element mounts in a tubular housing. The ball element has a passage through it which is coaxial with the riser when the ball element is in one position. A drive motor will rotate the ball element 90 degrees to place the ball element passage perpendicular to the riser passage to block flow. A pipe sealing member locates in the passage of the ball element. Hydraulic fluid pressure applied to the pipe sealing element will causes the pipe sealing element to seal around pipe.

REFERENCES:
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patent: 4440232 (1984-04-01), Le Moine
patent: 4460150 (1984-07-01), Turlak et al.
patent: 4579314 (1986-04-01), Schaeper et al.
patent: 4703807 (1987-11-01), Weston
patent: 5037065 (1991-08-01), Hirz et al.
Hughes Drilling Equipment (Hughes Offshore) KFDJ Diverter System.

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