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Method and arrangement for mooring of ship, particularly ship for oil and/or gas production

A technology for anchoring and mining wells, applied in anchoring arrangement, transportation and packaging, ship construction, etc., which can solve the problems of expensive purchase and cumbersome use of anchoring devices

Inactive Publication Date: 2003-07-09
HITEC SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Such known anchoring devices are expensive to purchase and operate and relatively cumbersome to use

Method used

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  • Method and arrangement for mooring of ship, particularly ship for oil and/or gas production
  • Method and arrangement for mooring of ship, particularly ship for oil and/or gas production
  • Method and arrangement for mooring of ship, particularly ship for oil and/or gas production

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Embodiment Construction

[0023] In the drawings, reference numeral 10 denotes a mining vessel. Once the vessel is anchored it is desired to have rotatability relative to wind / current conditions, and there is at least one production well, not shown, on the seabed 12 relative to which the production vessel 10 is positioned. Reference numeral 14 indicates sea level.

[0024] In the illustrated embodiment, the mining vessel is anchored by means of eight anchor lines 16a, 16b, 16c, 16d, 16a', 16b', 16c' and 16d' in the form of anchor chains, each leading to a pre-set Anchor points 18 on the seabed 12.

[0025] According to this embodiment, the lengths of four adjacent anchor cables 16a, 16b, 16c, 16d from respective anchor points 18 to a connecting hook 20 fixed to the turntable 22 are all fixed, see Figure 4-6 , the turntable is arranged to be rotatable relative to the ship 10 .

[0026] The turntable 22 is liftable so as to be able to temporarily expose the substructure and is also provided with a ve...

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Abstract

When mooring a production ship (10) above a submarine production well, minimum three (usually e.g. eight) anchor lines are used each extending from a stationary point at the seabed to a separate attachment point on the ship (10). At least one anchor line (16b, 16c) (of a minimum line number of three) has a fixed length and leads to an attachment hook (20) on-board the ship, while each of the remaining anchor lines (16a', 16c', 16d'), as known per se, has a changeable, shortenable length between the stationary seabed point and a point (34) on the ship (10), e.g. by means of a winch for each of said longitudinally changeable anchor lines (16a', 16c', 16d'), simplifying the mooring arrangement constructively and the mooring operations functionally.

Description

technical field [0001] The present invention relates to a method for anchoring a vessel on the high seas, in particular an oil and gas production vessel positioned above a submerged oil well, the vessel comprising three or more anchor chains / cables, these The anchor chain extends from a turntable provided on the ship to an anchor point on the seabed. [0002] The present invention also relates to an anchoring arrangement using said three or more anchor chains / cables, the object of which is to obtain considerable simplifications and improvements relating to or indirectly related to said turntable, Said simplification implies savings, both economically and in the operations of setting up the anchorage. Background technique [0003] Patent document WO96266861A describes an anchoring assembly for an offshore floating object, which assembly includes a standpipe in the floating object, a rotating part mounted in the standpipe rotatably around a vertical axis, a plurality of A ca...

Claims

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Application Information

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IPC IPC(8): B63B21/50B63B27/24B63B35/00
CPCB63B21/507
Inventor A·斯梅达尔
Owner HITEC SYST