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Construction technology of derrick of self-elevating drilling platform

A drilling platform and self-elevating technology, which is applied in the direction of drilling equipment, earthwork drilling and production, support devices, etc., can solve the problems of long and short legs of columns, troubles, excessive well center offset, etc., and achieve the effect of reducing deformation

Active Publication Date: 2016-06-08
NANTONG ZHENHUA HEAVY EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to assembly and welding deformation in the subsequent construction process, problems such as dislocation of bolt holes, long and short legs of columns, and excessive well center offset
The above problems are relatively common, and it is difficult to completely avoid them. Once they occur, they will be more troublesome to solve.

Method used

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  • Construction technology of derrick of self-elevating drilling platform
  • Construction technology of derrick of self-elevating drilling platform
  • Construction technology of derrick of self-elevating drilling platform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 2 , image 3 As shown, the connection between the upper column steel 23 and the lower column steel 21 is realized through the upper flange plate 33 and the lower flange plate 22 that are closely attached to each other; first, the upper and lower flange plates are leveled, and then the two flanges are tightly attached Fix it with process bolts 31 and stickers 32; maintain this state during the assembly and welding of column steel and flanges, and remove the process bolts 31 and stickers 32 after the welding operation is completed.

[0034] First, the lower column shaped steel 21 and the lower flange plate 22 are assembled and fixed by spot welding, then the upper flange plate 33 is connected with the lower flange plate 22 through the process bolt 31, and fixed with the sticking plate 32, and finally the upper column shaped steel 23 is connected with the lower flange plate 22. The upper flange plate 33 is fixed by spot welding. The flange plate and the c...

Embodiment 2

[0037] Such as Figure 4 As shown, in step (2), adopt a control method to realize the length of the column and the height of the storey, lay the four columns flat, and adjust the ends of the four columns to be in the same plane, and then draw the reference line and the floor height line as a whole 43. Surplus trimming line 44.

[0038]The bottom flanges 46 of the four pillars in the first section need to be machined and scraped, and the flatness after processing is ≤0.25mm. Place the column section steel 4 of the first section of the derrick on the horizontal plane, adjust the column level to ≤1mm, and the overall flatness of the column bottom flange 46≤0.5mm (that is, the absolute value of the subtraction of any two values ​​in L1~L4≤0.5mm), priority To ensure the overall flatness size, the measurement reference plane 45 should be selected during actual measurement. Install the second section of column section steel 4 on the basis of the first section of column section stee...

Embodiment 3

[0041] Such as Figure 5 As shown, a method for centering the bolt holes is adopted, and the method of bolt connection is generally used between the beam 3 and the column; according to the position of the bolt holes, it is determined whether to choose pre-drilling or on-site drilling; the general working conditions are good, and it is convenient The location of the drilling equipment operation is selected to be equipped with drilling holes on site, and the special location is selected to be installed after pre-drilling.

[0042] When the gusset plate 53 is positioned on the column section steel 4 panel, at first position and weld the gusset plate 53, the cross beam 3 is welded and fixed with the gusset plate 53 by the angle steel fixing frame 54, and then use the magnet drill 52 to drill the bolt holes on the gusset plate 53 on-site. After the holes are completed, use process bolts to fix the angle steel fixing frame 54 and the gusset plate 53. When the gusset plate 53 is loc...

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PUM

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Abstract

The invention relates to a construction technology of a derrick of a self-elevating drilling platform. The construction technology comprises steps as follows: preparation of materials: stand column profile steel, cross beams, inclined struts and passage gate beams which are required by the derrick are manufactured respectively; splicing of side pieces: the derrick comprises front, back, left and right side pieces, the left and right side pieces are spliced firstly, splicing includes lower section splicing and upper section splicing, and splicing is performed after upper section splicing and lower section splicing are completed; assembly of the side pieces: firstly, two lower section side pieces of the left and right side pieces are symmetrically put in place, then corresponding parts of the front and back side pieces are constructed between the left and right side pieces, secondarily, middle section side pieces of the left and right side pieces are connected on the lower section side pieces, corresponding parts of the front and back side pieces are constructed again as per the method and so on, and construction of the whole derrick is completed; mounting of a top flange: the top flange is mounted in a shifted manner so as to adjust the offset of a core. The construction technology has the advantages as follows: all construction requirements of the derrick can be guaranteed, meanwhile, the construction efficiency can be improved, and the construction cost can be reduced.

Description

technical field [0001] The invention relates to a self-elevating drilling platform, in particular to a construction process of the derrick of the self-elevating drilling platform. Background technique [0002] With the accelerated pace of ocean development, the development prospects of the ocean engineering equipment industry are getting brighter and brighter. As one of the mainstream products of the offshore engineering family, the jack-up drilling platform has naturally become the object of competition among various companies. As an important structure of the drilling platform, the derrick requires very strict construction accuracy, such as the size of the key parts are controlled within 1-2mm. [0003] At present, the degree of automation in foreign countries is very high. Relying on machinery and equipment, the blanking, scribing, and drilling processes have been completed in the project preparation stage, and are usually set to a fixed margin. However, due to assembly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00E21B15/00
CPCB23P15/00E21B15/00
Inventor 徐松林海桥
Owner NANTONG ZHENHUA HEAVY EQUIP MFG