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Top tensioned riser

A riser and oil riser technology, applied in the direction of drill pipe, casing, wellbore/well components, etc., can solve the problems of increased weight and cost

Inactive Publication Date: 2007-05-30
SINGLE BUOY MOORINGS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In deep water the weight and cost of the SCR will increase significantly as the water depth and / or the diameter of the SCR increases

Method used

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  • Top tensioned riser
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Examples

Experimental program
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Embodiment Construction

[0015] Referring first to Fig. 1, a typical single-column TLP platform, the whole of which is marked by numeral 10 in the figure. The platform 10 includes a post or shell 12 projecting above the water surface 14 on which one or more platform decks 16 are supported. The pontoon 18 extends radially outward from the bottom of the housing 12 . The platform 10 is anchored to the seabed 20 by steel wire bundles 22 . Steel chain risers 24 are supported on a lining 26 near the keel level of the platform shell 12 . The chain risers 24 extend in a chain path to a touchdown point 28 on the sea floor 20 . The riser 24 may be hundreds or thousands of feet long and hangs freely between the support liner 26 and the touchdown point 28 . Sea currents may therefore move the riser 24 so that it interferes with the wire bundles 22 under certain conditions.

[0016] Referring now to FIG. 2 , the top tensioning riser 30 of the present invention extends substantially vertically downward from a r...

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PUM

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Abstract

A top tensioned riser extends substantially vertically from a platform hull to the seabottom. The riser includes length adjustment at its upper end and is detachably connected to an anchor pile at its lower end. Riser tension is monitored via load cells incorporated in the riser porch. The riser is connected to one or more import / export flowlines or pipelines.

Description

technical field [0001] The present invention relates to an oil flow riser, and more particularly to a top tensioned import / export oil flow riser for a tension leg platform (TLP) for testing and producing nearshore hydrocarbon formations. Background technique [0002] The Top Tension Riser (TTR) utilizes the excellent kinematic characteristics of the TLP to provide a cost-effective flow riser. In deep water, the import / export risers are usually of the Steel Ceiling Riser (SCR) form, where the pipe is supported at the riser liner near the keel level of the TLP and takes an arcuate or chain path to touchdown Or the connection points on the ocean floor. As the water depth and / or the diameter of the SCR increases in deep water, its weight and cost will increase significantly. The SCR extends outwardly from the TLP where it is supported at its upper end. Due to the proximity of the SCR and the tension in anchoring the TLP to the seabed, interference between the riser and the wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02E02D5/62E21B19/00E21B43/00
CPCE21B19/004B63B21/502
Inventor 特拉维斯·R·乔丹杰夫雷·D·欧腾肯特·B·戴维斯
Owner SINGLE BUOY MOORINGS INC
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