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Permanent locating segment assembling and welding method for rack and leg of drilling platform

A drilling platform, permanent technology, applied in the direction of auxiliary equipment, welding equipment, welding equipment, etc., can solve the problems of difficult to guarantee welding quality, large welding deformation and stress, and high labor intensity of workers, so as to improve welding efficiency and reduce welding Stress, the effect of shortening the welding cycle

Inactive Publication Date: 2015-10-28
BOHAI SHIP HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the disadvantages of this welding method are low welding efficiency, long welding cycle, high labor intensity, large welding deformation and stress, and difficult to guarantee welding quality.

Method used

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  • Permanent locating segment assembling and welding method for rack and leg of drilling platform
  • Permanent locating segment assembling and welding method for rack and leg of drilling platform
  • Permanent locating segment assembling and welding method for rack and leg of drilling platform

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Experimental program
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Effect test

Embodiment Construction

[0028] As shown in the figure, a rack 2 is installed on the pile leg 1, and the joint of the pile leg and the rack is welded and assembled through the welding point 3 of the permanent positioning section.

[0029] The welding points of the permanent positioning sections are the permanent positioning section 4 at the head end, the permanent positioning section 5 at the tail end, the permanent positioning section 6 in the middle, and the remaining permanent positioning sections 7 and 8 .

[0030] Each positioning segment is welded at the junction of the leg and the rack.

[0031] The method of assembling and welding the rack and the permanent positioning section of the leg, the specific implementation process is as follows:

[0032] Select the 4.8-meter rack and leg to be welded. Before welding, clean up the water, rust, oil, etc. on the surface of the area to be welded and within 20 mm on both sides; The rack is preheated; the permanent positioning section is welded. The lengt...

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Abstract

The invention provides a permanent locating segment assembling and and welding method for a rack and a leg of a drilling platform. The method comprises the following steps: at first, an angular heating sheet is utilized to preheat both a leg and a rack; then assembling and welding permanent locating segments in sequence; after finish of permanent locating segment welding, carrying out after-heating; and after completion of after-heating, conducting pre-heating, welding and after-heating on product seams. The rack is inserted into the leg in a penetrating manner, and the connecting part of the leg and the rack is subjected to welding combination through permanent locating segment welding points. The method has the positive results that firstly, the welding stress and the welding deformation are reduced, and the welding quality and precision are improved; secondly, the welding efficiency is improved and the welding period is shortened; and thirdly, the labor intensity of workers is reduced. The method is suitable for rack and leg welding.

Description

technical field [0001] The invention relates to an assembly and welding method, in particular to an assembly and welding method for a drilling platform rack and a permanent positioning section of a pile leg. Background technique [0002] As a key part of the jack-up platform, the rack and pinion lifting system is highly valued in the design and manufacture of the platform. The lifting system of the jack-up platform bears almost the entire gravity and working load of the platform, and its safety performance plays a decisive role in the normal operation of the platform. Therefore, the rack precision requirements are very high. After the typical platform rack and leg are welded, it is required to close the tooth spacing tolerance after welding. [0003] 1.2mm, the straightness tolerance of the rack is 3mm / 10m, the tooth profile synchronization on both sides of any tooth does not exceed 5mm, and the tooth top spacing tolerance is ±2mm. Therefore, ensuring the welding accurac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K37/00
CPCB23K31/02B23K37/00
Inventor 吴满鹏刘殿宝高峰王长河韩永庆苏武李洋刘丽华
Owner BOHAI SHIP HEAVY IND CO LTD
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