Installation of subsea risers
A method of installing a wave-configuration subsea riser 32 of unbonded flexible pipe comprises lowering the riser progressively into the sea from an installation vessel 30 while suspending an elongate clump weight 38 in a catenary shape that comprises first 70 and second 72 limbs extending upwardly...
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| creator | Alberto Lima Dos Santos Mauricio Suarez De Oliveira Davi Couto Neves Junior Andre Ramiro Amorim |
| description | A method of installing a wave-configuration subsea riser 32 of unbonded flexible pipe comprises lowering the riser progressively into the sea from an installation vessel 30 while suspending an elongate clump weight 38 in a catenary shape that comprises first 70 and second 72 limbs extending upwardly from a conjoining bottom portion 74. An upper end of the first limb, at a distal end of the clump weight 38, is attached 46 to the riser and an upper end of the second limb 70, at a proximal end of the clump weight 38, is suspended from a winch 66 or crane of the vessel 30. While lowering the riser 32 from the vessel 30, the weight load applied to the riser 32 by the clump weight 38 is controlled by adjusting the relative lengths of the first 70 and second limbs 72 of the clump weight 38. |
| format | Patent |
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An upper end of the first limb, at a distal end of the clump weight 38, is attached 46 to the riser and an upper end of the second limb 70, at a proximal end of the clump weight 38, is suspended from a winch 66 or crane of the vessel 30. 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An upper end of the first limb, at a distal end of the clump weight 38, is attached 46 to the riser and an upper end of the second limb 70, at a proximal end of the clump weight 38, is suspended from a winch 66 or crane of the vessel 30. 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An upper end of the first limb, at a distal end of the clump weight 38, is attached 46 to the riser and an upper end of the second limb 70, at a proximal end of the clump weight 38, is suspended from a winch 66 or crane of the vessel 30. While lowering the riser 32 from the vessel 30, the weight load applied to the riser 32 by the clump weight 38 is controlled by adjusting the relative lengths of the first 70 and second limbs 72 of the clump weight 38.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS EQUIPMENT FOR SHIPPING FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PERFORMING OPERATIONS PIPES RELATED EQUIPMENT SHIPS OR OTHER WATERBORNE VESSELS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS |
| title | Installation of subsea risers |
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