Hydraulic and earth engineering – Marine structure or fabrication thereof – With horizontally movable work deck
Reexamination Certificate
2007-06-26
2007-06-26
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Marine structure or fabrication thereof
With horizontally movable work deck
C405S195100
Reexamination Certificate
active
11247371
ABSTRACT:
An apparatus and method for maintaining electrical and hydraulic connections between a junction box (or junction boxes) located on or near an offshore platform's floor and a movable drilling rig structure are disclosed. The disclosed invention is a unique vertically folding service arm capable of moving in both the horizontal and vertical directions in order to provide enhanced range of movement. The increased range of movement provided by the vertically folding service arm of the present invention allows electrical and hydraulic supply lines to remain connected between a junction box (or boxes) located on or near the platform floor and the rig structure even as the rig structure moves back-and-forth on the platform between multiple well centers. The vertically folding service arm of the present invention can also be easily disconnected and “folded” for transport without requiring the electrical and hydraulic supply lines to be disconnected from the drilling rig structure.
REFERENCES:
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Drawings of a Prior Art Horizontal Plane Service Arm (Jul. 31, 1993).
Drawings of a Prior Art Horizontal Plane Service Arm (Mar. 17, 1990).
The PCT International Search Report and The Written Opinion of the International Search Authority, dated Mar. 14, 2007 of PCT Application Serial No. PCT/US05/36528, filed Oct. 12, 2005.
Donnally Robert B.
Fehres Neil E.
Howrey LLP
Lagman Frederick L.
National-Oilwell L.P.
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