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The Method of Lengthening and Closing the Pile Legs of Jack-up Drilling Platform

A drilling platform pile leg and drilling platform technology, applied in the direction of load hanging components, transportation and packaging, etc., can solve the problems of high-altitude operations, long operation time, high positioning requirements, etc., and achieve high safety, low cost, and welding environment Good results

Active Publication Date: 2017-03-29
CCCC SECOND HARBOR CONSULTANTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above installation methods all have the disadvantages of high-altitude operations (the maximum operating height is about 180m), long operation time, low safety, high cost, low efficiency, high positioning requirements, inconvenient operation and difficult control, etc., and are also affected by lifting equipment. Height limit

Method used

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  • The Method of Lengthening and Closing the Pile Legs of Jack-up Drilling Platform

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0044] After the jack-up drilling platform 3 is built on the land site 4 and the spud cans 5 are positioned, the spud legs 6 of the jack-up drilling platform start to be lengthened and closed. The method for lengthening and closing up the pile legs 6 of the jack-up drilling platform of the present invention comprises the following steps:

[0045] 1) if figure 1 As shown, a gantry crane 1 (two gantry cranes 1 are provided in this embodiment) is installed on the dock or harbor basin 7, and installed on the gantry crane 1 (near the dock or harbor basin 7 side) 2 sets of pick-up cranes arranged at intervals, the net distance between the two pick-up cranes 2 is greater than the section size of the pile leg 6 (to prevent the whole pile leg 603 from colliding with the pick-up crane 2 in the lifting project).

[0046] Two pick-up cranes 2 are installed on the...

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Abstract

The invention relates to a method for spud leg lengthening and folding of a self-elevating drilling platform. The method includes the steps that a portal crane is arranged on a dock or harbor basin, and two derrick mast cranes distributed in a spaced manner are installed on the portal crane; a first spud leg section is firstly installed, and the self-elevating drilling platform is moved into the dock or harbor basin; then the rest of spud leg sections are spliced and welded to form a spud leg whole; the spud leg whole is hoisted, erected and lifted to a certain height through the two derrick mast cranes; the two derrick mast cranes and the spud leg whole are driven by the portal crane to be moved to the dock or harbor basin; and finally, the position of the self-elevating drilling platform is adjusted, the installed first spud leg section and the spud leg whole are in butt joint and are then welded, and lengthening of the rest of spud legs is completed according to the above steps. According to the method, work high above the ground is reduced, the height of spud leg lengthening and folding operation is decreased, the building cost is reduced, and the installation efficiency and the installation quality are improved.

Description

technical field [0001] The invention belongs to the field of marine engineering construction, and in particular relates to a method for lengthening and closing pile legs of a self-elevating drilling platform. Background technique [0002] At present, the operating water depth of most jack-up drilling platforms is 300 feet, 350 feet and 400 feet, and the length of the pile legs is 120-170 meters. The working water depth of the jack-up drilling platform is constantly increasing, for example, the leg length of the 500-foot jack-up drilling platform is 205m. [0003] The main construction methods of the jack-up drilling platform are dock construction and ground construction. The length of the pile legs of the two construction methods is hoisted by the gantry crane on the dock or on the site, which is limited by the lifting height of the gantry crane (70-90 m). After connecting one or two leg segments (the length of each leg segment is about 20m), it needs to be launched into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/08
CPCB66C13/08
Inventor 雷鹏王晋谢长文蔡开程杨新才秦俊刘赛龙程凯
Owner CCCC SECOND HARBOR CONSULTANTS CO LTD
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