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Anti-deformation welding method for pile legs of drilling platform

A technology of drilling platform legs and welding methods, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., to achieve the effects of improving dimensional accuracy, avoiding orthopedics, and improving work efficiency

Active Publication Date: 2016-02-03
YANTAI RAFFLES SHIPYARD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a welding method for preventing welding deformation when the pile leg chord and the main chord of the drilling platform are welded, and the welding deformation is prevented through reasonable welding sequence and appropriate stress relief steps Effect

Method used

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  • Anti-deformation welding method for pile legs of drilling platform
  • Anti-deformation welding method for pile legs of drilling platform
  • Anti-deformation welding method for pile legs of drilling platform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] see figure 1 ,as the picture shows,

[0063] (1) The horizontal outer tube 21 and the horizontal inner tube 22 are positioned (pre-welded);

[0064] (2) Welding 1,3,5,7 layers (odd layers 20-1,20-3,20-5,20-7) horizontal outer tube 21 at the same time, each layer has a, b, c, d, e , f six welding points, a total of 24 welds; after the welding is completed, weld the horizontal outer pipe 21 of 2, 4, and 6 layers (even-numbered layers 20-2, 20-4, 20-6) at the same time, a total of 18 welding port;

[0065] (3) weld 1,3,5,7 layers of horizontal inner pipe 22 at the same time, each layer has g, h, I, j, k, l six welding points, a total of 24 welds; after welding is completed, weld simultaneously 2, 4, and 6 layers of horizontal inner pipes 22 have a total of 18 welds.

[0066] see figure 2 ,as the picture shows,

[0067] This step is very important. The diameter of the diagonal support is large, the wall thickness is large, and the welding volume is large, which can e...

Embodiment 2

[0074] see figure 1 ,as the picture shows,

[0075] (1) The horizontal outer tube 21 and the horizontal inner tube 22 are first positioned;

[0076] (2) Weld the horizontal outer tube 21 of layers 1, 3, 5, and 7 (odd layers 20-1, 20-3, 20-5, 20-7) at the same time. After the horizontal outer tube 21 has been welded, the horizontal outer tube 21 is welded simultaneously inner tube 22;

[0077] (3) Weld the horizontal outer tubes 21 of layers 2, 4, and 6 (even-numbered layers 20-2, 20-4, and 20-6) at the same time, and then weld the horizontal inner tubes 22 at the same time after the welding is completed.

[0078] see figure 2 ,as the picture shows,

[0079] First all the first oblique supports 31 on the three sides of the pile legs (each side of the pile legs is first equipped with the oblique support tube on the left side) are positioned. After the positioning is completed, weld the lower ends of all the first oblique supports 31 a, b, c, d, e, f welding at the same tim...

Embodiment 3

[0084] see figure 1 ,as the picture shows,

[0085] (1) The horizontal outer tube 21 and the horizontal inner tube 22 are first positioned;

[0086] (2) weld the horizontal outer pipe 21 of the 4th layer (20-4) earlier, then weld the horizontal outer pipe 21 of the 3rd and 5th layers (20-3, 20-5), and then weld 2, 6 layers (20- 2, 20-6), finally welding the horizontal outer tube 21 of layers 1 and 7 (20-1, 20-7);

[0087] (3) The welding sequence of the horizontal inner pipe 22 is the same as that of the horizontal outer pipe 31 , or, after the horizontal outer pipe of the corresponding step is welded, the horizontal inner pipe 22 of the corresponding position is then welded.

[0088] see figure 2 ,as the picture shows,

[0089] First all the first oblique supports 31 on the three sides of the pile legs (each side of the pile legs is first equipped with the oblique support tube on the left side) are positioned. After the positioning is completed, weld the lower ends of al...

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Abstract

A deformation prevention welding method for pile legs of a drilling platform comprises the steps that first, horizontal outer tubes and horizontal inner tubes are positioned, afterwards, odd layers of horizontal outer tubes are welded simultaneously, then even layers of horizontal outer tubes are welded simultaneously, odd layers of horizontal inner tubes are welded simultaneously after all the horizontal outer tubes are welded, and then even layers of horizontal inner tubes are welded simultaneously; second, first diagonal supports on three faces of each pile leg are positioned, afterwards, welding seams in the lower ends of all the first diagonal supports are welded simultaneously, positioning welding seams in the upper ends of all the first diagonal supports are planed or polished so that stress relief can be conducted, and the welding seams in the upper ends of all the first diagonal supports are welded simultaneously after repositioning; third, second diagonal supports on three faces of each pile leg are positioned, afterwards, welding seams in the lower ends of all the second diagonal supports are welded simultaneously, then positioning welding seams in the upper ends of all the second diagonal supports are planed or polished so that stress relief can be conducted, and the welding seams in the upper ends of all the second diagonal supports are welded simultaneously after repositioning.

Description

technical field [0001] The invention relates to the field of drilling platform pile leg construction, in particular to a welding method for preventing deformation when pile leg segmental chords and main chords are welded together. Background technique [0002] Jack-up drilling platforms occupy a pivotal position in the field of ocean engineering. The pile legs belong to a special area in the structure of the truss drilling platform. Because they need to cooperate with the gears of the gearbox to lift the main hull, the precision requirements are very high. However, the structure of the pile leg is relatively complicated, and there are many and dense welding nodes, which brings greater difficulties to the construction of the pile leg. In order to make the construction of pile legs meet the accuracy required by the design, in addition to the selection of suitable tire frames, the selection of welding sequence is the most important thing, which has a great impact on the dimens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02
CPCB23K31/02
Inventor 安东魏丽芹于全宝刘丽华朱武营张涛
Owner YANTAI RAFFLES SHIPYARD
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