Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1997-12-22
2000-01-25
Bagnell, David
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
4051951, 405224, 4052231, 166359, 166367, 384 99, 384124, E02D 562, F16C 2700
Patent
active
060171685
ABSTRACT:
An undersea telescopic joint for a riser system is connected to a drilling vessel with a plurality of tensioners. The joint has a bearing with inner and outer annular mating members. A cap seals the outer member to the joint. The outer member closely receives and is axially movable relative to the inner member. A flat thrust bearing is located in a chamber between the two members. The members are sealed to one another with upper and lower swivel seals. A passage communicates hydraulic fluid to the chamber. The bearing has a pressure gage which registers with a passage that extends between the swivel seals. The chamber is filled with hydraulic fluid so that the two members are separated and the drilling vessel may rotate easily. The gage is used to detect whether the primary swivel seal is leaking.
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Fraser, Jr. Thomas A.
Kennedy Derek C.
Nguyen Anh D.
ABB Vetco Gray Inc.
Bagnell David
Bradley James E.
Lee Jong-Suk
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