Apparatus for bending a flowline under subsea conditions

Details Apparatus for bending a flowline under subsea conditions Apparatus for bending a flowline under subsea conditions

1975-01-02

1976-05-11

Aegerter, Richard E.

Pipes and tubular conduits

Combined

72295, 72369, F16L 5500

Patent

active

039555992

ABSTRACT:
An apparatus for terminating a subsea flowline at an offshore structure by providing a bend in the continuous flowline at the bottom of the offshore structure to provide an upstanding flowline end portion adapted to be secured to the offshore structure. A pipe bending device comprising a plurality of spaced cylindrical segments sleeved over a selected location on the flowline with adjacent segments pivotally interconnected to each other on one side of the flowline and end cylindrical segments pivotally interconnected to each other by a cylinder and piston means on the opposite side of the flowline. The device is fixed to the flowline at an end segment thereof. Actuation of the cylinder and piston means imposes a bending force on the flowline within the cylindrical segments for imparting a bend of selected radius to the flowline within the cylindrical segments. In the method of subsea bending of the flowline, such initial bending forces by the bending device assure bending of the flowline, which is normally under tension during laying, at a desired location as the vessel laying the flowline reduces tension therein to bring the upward rising flowline pipe portion into position for connection to the offshore structure.

REFERENCES:
patent: 2177128 (1939-10-01), Johnson
patent: 2286893 (1942-06-01), Boissou
patent: 3731513 (1973-05-01), Kinderman et al.

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