CN104999187A - Permanent locating segment assembling and welding method for rack and leg of drilling platform - Google Patents
Permanent locating segment assembling and welding method for rack and leg of drilling platform Download PDFInfo
- Publication number
- CN104999187A CN104999187A CN201510406647.9A CN201510406647A CN104999187A CN 104999187 A CN104999187 A CN 104999187A CN 201510406647 A CN201510406647 A CN 201510406647A CN 104999187 A CN104999187 A CN 104999187A
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- China
- Prior art keywords
- welding
- positioning section
- permanent positioning
- permanent
- heat
- Prior art date
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- 238000003466 welding Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005553 drilling Methods 0.000 title claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000011017 operating method Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
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
The present invention relates to assembling and welding process, specifically a kind of drilling platforms tooth bar and the permanent positioning section assembling and welding process of spud leg.
Background technology
Gear rack lifting system, as the key component of jack-up unit, is paid much attention in the manufacturing and designing of platform.The jacking system of jack-up unit carries gravity and the service load of almost whole platform, and its security performance plays conclusive effect for the normal work of platform.Therefore, tooth bar required precision is very high.Require after typical platform tooth bar has welded with spud leg that postwelding closes up ability to speak spacing tolerance.
1.2mm, rack linear degree tolerance is 3mm/10m, and any tooth both sides toothed synchronous degree is no more than 5mm, and gear tip clearance is ± 2mm apart from tolerance.Therefore, ensure that tooth bar and spud leg welding equipment precision are the important guarantees of platform reliance security.
Straight-through weldering is adopted continuously when jack-up unit tooth bar known at present welds with spud leg.Before welding, adopt flat heating plate preheating, heating plate is arranged in tooth bar both sides; During welding, upper and lower two toothed rack of each complete cross section and every toothed rack both sides totally four road weld seams are symmetrically welded simultaneously, and whole complete cross section requires that continuous welding completes; Postwelding carries out after-baking.
Because rack steel carbon equivalent is high, tendency of hardenability is large, before welding, preheat temperature is high, and be almost Free Transform after the less heating of tooth bar constraint (restraint) degree, spud leg rigidity is out of shape comparatively greatly hardly, cause heating rear tooth bar elongation very large, and spud leg elongation is very little, postwelding tooth bar amount of contraction is very little, causes tooth bar postwelding elongation very large, there is very large stress in tooth bar, increases welding cold cracking risk.
Because welding equipment hour rack is in free deformation, so must ensure the Symmetrical Continuous welding simultaneously of the upper and lower two toothed rack four road weld seams of each complete cross section, require high to the synchronous degree of welding, welding condition controls tight, just may meet accuracy Design requirement.If postwelding is measured find that precision is overproof, size is difficult to adjust again.Each complete cross section welding equipment workload 150 hours, require that workman's continuous welding completes, labour intensity is large.
In sum, the shortcoming of this assembling and welding process is that welding efficiency is low, and welding interval is long, and labor strength is large, and greatly, welding quality is difficult to ensure for welding deformation and stress.
Summary of the invention
Welding to overcome existing tooth bar the shortcoming existed with spud leg, the present invention proposes a kind of drilling platforms tooth bar and the permanent positioning section assembling and welding process of spud leg.The long weld seam of this large rigidity cancels continuously straight-through weldering, carries out permanent positioning section welding equipment.Solve the technical problem of drilling platforms tooth bar and spud leg welding equipment.
The scheme that technical solution problem of the present invention adopts is:
Spud leg is provided with tooth bar, is welded by permanent positioning section pad in spud leg and tooth bar junction and combine.
Described permanent positioning section pad, is respectively permanent positioning section, all the other permanent positioning sections in the middle of the permanent positioning section of head end, the permanent positioning section of tail end.
Each positioning section is welded on spud leg and tooth bar junction.
First adopt angle heating plate simultaneously to spud leg and tooth bar preheating, then carry out permanent positioning section welding equipment in order, carry out after heat after permanent positioning section welding terminates, after after heat completes, carry out the preheating of production joint, welding and after heat.
Spud leg is provided with tooth bar, is welded by permanent positioning section pad in spud leg and tooth bar junction and combine.
Permanent positioning section assembling and welding process mainly comprises following technical step:
1) before welding by clean for water, iron rust, the cleaning oil pollution treated within the scope of land surfaces and both sides 20mm.
2) adopt angle heating plate simultaneously to spud leg and tooth bar preheating before permanent positioning section welding.
3) carry out permanent positioning section welding, permanent positioning section fusion length is not less than 300mm, and permanent positioning section throat depth is concordant with groove, permanent positioning section spacing 1.2 meters.
4) when forever positioning section welds, first carry out the permanent positioning section welding of head end, after welding and after heat complete and be chilled to room temperature, carry out the permanent positioning section welding of tail end, the permanent positioning section of tail end welds four layers and heats middle permanent positioning section afterwards and complete welding; Heat all the other permanent positioning sections after middle permanent positioning section welds four layers and complete welding, before production joint welding, all permanent positioning section after heat complete, and after heat adopts angle heating plate to carry out.
5) adopt angle heating plate simultaneously to spud leg and tooth bar preheating before production joint welding.
6) production joint welding adopts backstep in batches.
7) production joint welding terminates rear employing angle heating plate and carries out after heat.
Good effect is: the advantage of the inventive method is: 1) reduce welding stress, reduces welding deformation, ensure that welding quality and precision.2) improve welding efficiency low, shorten welding interval, 3) reduce the labour intensity of workman.Suitable method of welding with spud leg as tooth bar is applied.
Accompanying drawing explanation
Fig. 1 is front view of the present invention
Fig. 2 is partial enlarged drawing of the present invention
Fig. 3 is sectional view of the present invention
In figure, 1. spud leg, 2. tooth bar, 3. permanent positioning section pad, the 4. permanent positioning section of head end, the 5. permanent positioning section of tail end, permanent positioning section 6., 7 and 8. all the other permanent positioning sections.
Detailed description of the invention
According to the figure, spud leg 1 is provided with tooth bar 2, is welded by permanent positioning section pad 3 in spud leg and tooth bar junction and combine.
Described permanent positioning section pad, is respectively the permanent positioning section of head end 4, the permanent positioning section of tail end 5, middle permanent positioning section 6, all the other permanent positioning sections 7 and 8.
Each positioning section is welded on spud leg and tooth bar junction.
Tooth bar and the permanent positioning section assembling and welding process of spud leg, concrete implementing process is as follows:
Choose 4.8 meters of tooth bars and spud leg treats welding line, before welding, the water, iron rust, greasy dirt etc. treated within the scope of land surfaces and both sides 20mm are cleaned out; Adopt angle heating plate simultaneously to spud leg and tooth bar preheating before permanent positioning section welding; Carry out permanent positioning section welding, permanent positioning section fusion length 300mm, permanent positioning section weld seam welds four layers, and throat depth is concordant with groove, permanent positioning section spacing 1.2 meters; When permanent positioning section welds, first carry out the permanent positioning section welding of head end, after welding and after heat complete and be chilled to room temperature, carry out the permanent positioning section welding of tail end, the 2nd permanent positioning section welds four layers and heats middle permanent positioning section afterwards and complete welding; Heat all the other permanent positioning sections after middle permanent positioning section welds four layers and complete welding, before production joint welding, all permanent positioning section after heat complete, and after heat adopts angle heating plate to carry out.
Adopt angle heating plate simultaneously to spud leg and tooth bar preheating before production joint welding.Production joint welding is carried out in two batches, and when often criticizing welding, there are 2 workmans weld seam side, and welding adopts backstep.Production joint welding terminates rear employing angle heating plate and carries out after heat.Permanent positioning section welding and production joint welding sequence are shown in Fig. 2, and shadow region is permanent positioning section.Welding end is carried out Magnetic testing and is not found crackle after 72 hours, measurement tooth bar and spud leg precision meet design requirement.
Claims (1)
1. a drilling platforms tooth bar and the permanent positioning section assembling and welding process of spud leg, it is characterized in that: first adopt angle heating plate simultaneously to spud leg and tooth bar preheating, then permanent positioning section welding equipment is carried out in order, carry out after heat after permanent positioning section welding terminates, after after heat completes, carry out the preheating of production joint, welding and after heat;
Operating procedure:
1) before welding by clean for water, iron rust, the cleaning oil pollution treated within the scope of land surfaces and both sides 20mm;
2) adopt angle heating plate simultaneously to spud leg and tooth bar preheating before permanent positioning section welding;
3) carry out permanent positioning section welding, permanent positioning section fusion length is not less than 300mm, and permanent positioning section throat depth is concordant with groove, permanent positioning section spacing 1.2 meters;
4) when forever positioning section welds, first carry out the permanent positioning section welding of head end, after welding and after heat complete and be chilled to room temperature, carry out the permanent positioning section welding of tail end, the permanent positioning section of tail end welds four layers and heats middle permanent positioning section afterwards and complete welding; Heat all the other permanent positioning sections after middle permanent positioning section welds four layers and complete welding, before production joint welding, all permanent positioning section after heat complete, and after heat adopts angle heating plate to carry out;
5) adopt angle heating plate simultaneously to spud leg and tooth bar preheating before weld seam welding;
6) weld seam welding adopts backstep in batches;
7) weld seam welding terminates rear employing angle heating plate and carries out after heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510406647.9A CN104999187A (en) | 2015-07-13 | 2015-07-13 | Permanent locating segment assembling and welding method for rack and leg of drilling platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510406647.9A CN104999187A (en) | 2015-07-13 | 2015-07-13 | Permanent locating segment assembling and welding method for rack and leg of drilling platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104999187A true CN104999187A (en) | 2015-10-28 |
Family
ID=54372187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510406647.9A Pending CN104999187A (en) | 2015-07-13 | 2015-07-13 | Permanent locating segment assembling and welding method for rack and leg of drilling platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104999187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234575A (en) * | 2015-11-18 | 2016-01-13 | 青岛海西重机有限责任公司 | Manufacturing method for self-elevating type offshore platform cylindrical pile leg |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6130298A (en) * | 1984-07-20 | 1986-02-12 | Kawasaki Steel Corp | Welding method of long-sized belt member to longitudinal direction of both side faces of long-sized main member |
| CN101225653A (en) * | 2007-10-22 | 2008-07-23 | 大连船舶重工集团有限公司 | Construction welding method for main chord pipe inside platform legs |
| CN102294531A (en) * | 2011-08-02 | 2011-12-28 | 唐山轨道客车有限责任公司 | Long weld joint welding process |
| CN102528236A (en) * | 2012-01-17 | 2012-07-04 | 武汉船用机械有限责任公司 | Welding method and welding jig for pile leg single-face rack |
| CN102699494A (en) * | 2012-07-04 | 2012-10-03 | 上海振华重工集团(南通)传动机械有限公司 | Overall heating automatic welding process of spud leg main coil of offshore drilling platform and special tool of overall heating automatic welding process |
| CN104805815A (en) * | 2014-07-28 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Pile leg rack mounting method and rack mounting device |
-
2015
- 2015-07-13 CN CN201510406647.9A patent/CN104999187A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6130298A (en) * | 1984-07-20 | 1986-02-12 | Kawasaki Steel Corp | Welding method of long-sized belt member to longitudinal direction of both side faces of long-sized main member |
| CN101225653A (en) * | 2007-10-22 | 2008-07-23 | 大连船舶重工集团有限公司 | Construction welding method for main chord pipe inside platform legs |
| CN102294531A (en) * | 2011-08-02 | 2011-12-28 | 唐山轨道客车有限责任公司 | Long weld joint welding process |
| CN102528236A (en) * | 2012-01-17 | 2012-07-04 | 武汉船用机械有限责任公司 | Welding method and welding jig for pile leg single-face rack |
| CN102699494A (en) * | 2012-07-04 | 2012-10-03 | 上海振华重工集团(南通)传动机械有限公司 | Overall heating automatic welding process of spud leg main coil of offshore drilling platform and special tool of overall heating automatic welding process |
| CN104805815A (en) * | 2014-07-28 | 2015-07-29 | 烟台中集来福士海洋工程有限公司 | Pile leg rack mounting method and rack mounting device |
Non-Patent Citations (3)
| Title |
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| 李震: "胜利作业五号平台齿轮齿条式升降系统焊接顺序优化", 《金属加工（热加工）》 * |
| 王林志: "钻井平台桩腿齿条的焊接工艺评定试验刍议", 《中国新技术新产品》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234575A (en) * | 2015-11-18 | 2016-01-13 | 青岛海西重机有限责任公司 | Manufacturing method for self-elevating type offshore platform cylindrical pile leg |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151028 |
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| RJ01 | Rejection of invention patent application after publication |