Drilling platform pile leg segmented closing technology

A drilling platform pile leg and pile leg technology, which is applied to artificial islands, water conservancy projects, infrastructure engineering, etc., can solve the problems of long-distance sea transportation such as high cost of pile legs, heavy closing workload, and serious influence of sea conditions, etc., to achieve The effect of improving closing efficiency, shortening closing period, and simple closing method

Active Publication Date: 2015-09-02
NANTONG BLUE ISLAND OFFSHORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: since the platform sails into the deep sea, the closure is seriously affected by the sea conditions, and there are strict requirements on sea wind, waves, and sea surges, and the cost of long-distance sea transportation is relatively large.
Due to the limitation of the lifting

Method used

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  • Drilling platform pile leg segmented closing technology
  • Drilling platform pile leg segmented closing technology
  • Drilling platform pile leg segmented closing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The invention discloses a segmental closing process of pile legs of a drilling platform. The method mainly includes hoisting and closing the offshore pile legs after the positioning of the platform piles is completed; Figure 1 to Figure 5 As shown, the hoisting legs are divided into five sections from bottom to top before closing, including the first leg segment 1, the second leg segment 2, the third leg segment 3, the fourth leg segment A4 and The fourth leg segment B5; the hoisting method is to use the floating crane to close the first leg segment 1, the second leg segment 2 and the third leg segment 3, and use the crawler crane to close the fourth leg segment A4 and the fourth leg segment B5; the specific steps for hoisting and closing the offshore legs are as follows:

[0044] The first step, the legs are in place: before closing the first leg segment 1, the second leg segment 2, the third leg segment 3, the fourth leg segment A4 and the fourth leg The leg section...

Embodiment 2

[0057] In this embodiment, on the basis of Example 1, in step (1), after the pile legs are in place, pre-close measurement is performed on each pile leg section on the wharf platform, mainly measuring the distance between the closing teeth and the center of the chord. Width, draw a closing reference line at the position of the closing mouth of the rack and punch it to ensure that the tooth spacing meets the tolerance requirements when closing and positioning.

Embodiment 3

[0059] In this embodiment, on the basis of Embodiment 1, in step (2), before the auxiliary positioning tooling is welded, draw a closing reference positioning installation line on the tooling plate, and the reference line is consistent with the rack reference line on the rack plate Consistent, taking into account the closing mouth welding shrinkage, such as Figure 13 As shown, after the closing mouth is positioned, the H dimension of the tooth spacing before welding should be controlled within 314.16mm+3mm as much as possible, and the H dimension of the tooth spacing after welding should be controlled within 314.16mm±2mm.

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Abstract

The invention relates to a drilling platform pile leg segmented closing technology. The drilling platform pile leg segmented closing technology mainly includes the steps of hoisting and closing an offshore pile leg after platform pile pitching positioning is completed, wherein the hoisted pile leg is segmented into five segments from bottom to top before closing, the five segments include a first pile leg segment, a second pile leg segment, a third pile leg segment, a fourth pile leg segment A and a fourth pile leg segment B, the first pile leg segment, the second pile leg segment and the third pile leg segment are closed by a floating crane, and the fourth pile leg segment A and the fourth pile leg segment B are closed by a crawler crane. The drilling platform pile leg segmented closing technology has the advantages that a pile leg structure is constructed by three large segments and two small segments according to the pile leg closing method, and by means of reasonable switching between the floating crane and the crawler crane, workload is reduced and closing period is shortened by about two months.

Description

technical field [0001] The invention relates to the technical fields of marine engineering and shipbuilding, in particular to a process for segmentally closing pile legs of a drilling platform. Background technique [0002] During the development of offshore oil and gas resources, the drilling platform is mainly used to drill oil and gas wells, and can also be used to drill production wells and workover operations, and can also be used as a drilling and production platform in early production. The realization of these main functions mainly depends on its special features. Application of components such as legs, lifting systems, locking devices and outriggers. [0003] The drilling platform is loaded with drilling machinery, power, equipment, living equipment and a number of liftable legs. When drilling, the spud shoes at the bottom of the legs touch the bottom, and the platform rises to a certain height from the sea surface along the legs; On the surface of the water, the l...

Claims

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Application Information

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IPC IPC(8): E02B17/02E02D27/12
Inventor 陈森良刘国欢刘传军
Owner NANTONG BLUE ISLAND OFFSHORE CO LTD
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