CN105436659B - The technique that a kind of pile legs of self-elevating drilling platform rack renews - Google Patents
The technique that a kind of pile legs of self-elevating drilling platform rack renews Download PDFInfo
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- CN105436659B CN105436659B CN201610008763.XA CN201610008763A CN105436659B CN 105436659 B CN105436659 B CN 105436659B CN 201610008763 A CN201610008763 A CN 201610008763A CN 105436659 B CN105436659 B CN 105436659B
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- rack
- seam
- drilling platform
- spud leg
- renews
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Classifications
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- 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
- B23K9/00—Arc welding or cutting
- B23K9/013—Arc cutting, gouging, scarfing or desurfacing
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses the technique that a kind of pile legs of self-elevating drilling platform rack renews, its step is：Before removing rack, first add limiting plate；Temporary support bracket is respectively welded in the upper and lower main chord tube for renewing rack, puts forth effort for interim stay tube, and hydraulic top jacking；Kaiyuan weld seam is dug, is jacked by hydraulic top, obtains weld shrinkage；Support tube is added between temporary support bracket；Gouge removes and is changed rack；To the upper and lower twice seam of the rack newly installed, seam under seam, then welding equipment in first welding equipment；Finally examine.Spud leg is removed before being renewed rack, first plus limiting plate limits moving freely on its front, rear, left and right direction, temporary support bracket is respectively welded on upper and lower main chord tube, the welding interior stress of other two racks for having welded completion of the weight of spud leg so above interface and same spud leg will not cause big, the uncertain displacement in direction to the joint of opening, to the rack newly installed, seam in first welding equipment, seam under welding equipment again, it is ensured that the spud leg rack of self-elevating drilling platform renews being smoothed out for work.
Description
Technical field
The present invention relates to the technique that a kind of pile legs of self-elevating drilling platform rack renews.
Background technology
In recent years, the manufacture of self-elevating drilling platform flourishes at home in ocean engineering.Spud leg be drilling platforms most
Important part, its dimensional accuracy and welding quality are all extremely important.When drilling platforms works, spud leg will bear huge
The total weight of main hull, so in general, the Material Strength of spud leg in itself is high, thickness is big.With the design of Dutch MSC companies
Exemplified by CJ50 series platforms, the tensile strength of its spud leg rack-plate and main chord tube has reached 830Mpa, and thickness also has 180mm.This
The alloying element of kind of steel is more, carbon equivalent ce and crack-sensitivity FACTOR P CM values height, along with its 180mm thickness, causes its manufacture
During welding and precision controlling have certain difficulty.Welding quality and precision, as long as both have one to go wrong, then
This docking port will be opened, and ressemble, weld.
Because rack is in the structural consequences of whole platform and the particularity of steel, same position only allows once to repair herein
Multiple processing, if still unqualified it is necessary to change weldment after repairing, is reconstructed.Again the construction difficulty for the rack changed compares again
It is bigger when installing, weld first.Because 1）Joint quantity now adds one times, assembling, welding and precision controlling side
Face also at least adds one times of work；2）Former interface is once opened, then the weight of the spud leg above interface and same stake
The welding interior stress of other two racks for having welded completion of leg may all cause big, direction not know the joint of opening
Displacement, this displacement if there is, that is, irreversible, the spud leg of this interface up may entirely be taken off, weight
New clothes, weldering；3）Again the new rack installed has very high binding force, the bad control of welding quality when welding；4）" thing
Therefore " appearance caused by project construction period pressure influence to assembling, welder and all levels of management personnel.So, in tooth
Bar renews work before it is necessary to formulate detailed processing steps careful, in view of the various emergency cases being likely to occur, whole
The risk that individual rack renews work is preferably minimized.
Accordingly, it is desirable to provide a kind of new technical scheme solves the above problems.
The content of the invention
The technical problem to be solved in the present invention is to provide the technique that a kind of pile legs of self-elevating drilling platform rack renews.Ensure
The spud leg rack of self-elevating drilling platform renews being smoothed out for work.
In order to solve the above technical problems, the technique that a kind of pile legs of self-elevating drilling platform rack of the present invention renews, including
Following steps：
1）Drilling platform leg is removed before being renewed rack, first plus limiting plate is limited on its front, rear, left and right direction
Move freely, make total can only upper and lower to movement；
2）Temporary support bracket is respectively welded on the upper and lower main chord tube for renewing rack；
3）The square work of former problem weld seam gouge is opened；
4）Hydraulic top is jacked to being changed the upper and lower crown of rack away from the weld shrinkage for reserving certain distance；
5）Temporary support pipe is set between the temporary support bracket of step 2；
6）Gouge removes and is changed rack；
7）To the upper and lower twice seam of the rack newly installed, using the assembling successively of first suitable for reading, rear lower mouth, weld
Sequentially, i.e., seam under seam, then welding equipment in first welding equipment；
8）Finally examine.
In the above-mentioned technical solutions, gouge is removed by before changing rack, and the upper and lower spud leg of limitation has been welded being changed on rack
Between occur front, rear, left and right relative movement limiting plate, make upper and lower spud leg that the relative displacement of upper and lower both direction can only occur.
Further, in step 4, when hydraulic top jacks, the upper and lower crown for being changed rack is received away from the weld seam for leaving 6mm
Contracting amount.
Beneficial effects of the present invention：The drilling platform leg rack renewed workmanship of the present invention, removes to spud leg and is renewed tooth
Before bar, first plus limiting plate limits moving freely on its front, rear, left and right direction, and interim branch is respectively welded on upper and lower main chord tube
Bracket is supportted, is puted forth effort for temporary support pipe, and hydraulic top jacking, the weight of the spud leg above such interface and same spud leg
The welding interior stress of other two racks for having welded completion will not cause big, the uncertain position in direction to the joint of opening
Move, to the rack newly installed, seam under seam, then welding equipment in first welding equipment, it is ensured that the spud leg rack of self-elevating drilling platform changes
What is newly worked is smoothed out.
Brief description of the drawings
What Fig. 1 was drilling platform leg to change the long rack of three teeth renews area schematic.
Fig. 2 a are added spacing horse plate schematic diagram before present invention cutting.
Fig. 2 b are Fig. 2 a side view.
Fig. 3 is the schematic diagram of temporary support pipe of the present invention.
Wherein：1st, the landing stage of scaffold, 2, front and rear limiting plate, 3, left and right limiting plate, 4, upper main chord tube, 5, lower main chord tube, 6,
Temporary support bracket, 7, temporary support pipe, 8, former problem weld seam, 9, spud leg down tube.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, should
Embodiment is only used for explaining the present invention, does not form the restriction to protection scope of the present invention.
The technique that a kind of pile legs of self-elevating drilling platform rack of the present invention renews, comprises the following steps：
1）It is determined that need the number of teeth renewed.General to require to avoid heat-affected zone, 3 ~ 4 teeth are advisable, shown in Fig. 1, to renew 3
Exemplified by tooth, there is spud leg down tube 9 on the upper main chord tube 4 of drilling platform leg, dash area and dash area semi-circular plate in figure
It is required for changing, dash area semi-circular plate flushes with the landing stage of scaffold 1, it is difficult to construct, scene need to change scaffold.
Renewing after region decides for rack, it is also contemplated that main chord tube will also renew one section, renews work to new rack
Journey leaves construction space, and renew length is advisable with both weld seams 300mm that staggers.Drilling platform leg is removed and is renewed rack
Before, first plus limiting plate limits moving freely on its front, rear, left and right direction, make total can only upper and lower to movement.Tool
Body：The welded limiting plate near rack original docking port, to limit the movement in rack front, rear, left and right direction.Such as Fig. 2 a, 2b
Shown, front and rear positive and negative each two pieces of limiting plate 2, positive two pieces are only welded former weld seam above section, and two pieces of reverse side only weld original
Weld seam is with lower part, and the effect of limiting plate is the movement of limitation diagram fore-and-aft direction before and after 4 pieces；Left and right limiting plate 3 also has 4 pieces,
It is welded at the crown for being changed rack, effect is the movement of limitation diagram left and right directions；
2）Temporary support bracket 6 is respectively welded on the upper and lower main chord tube 4,5 for renewing rack, for temporary support pipe 7
Power, and hydraulic top jacking；
3）Temporary support bracket 6 on upper main chord tube is used as hydraulic top support plate, by the mode of the former gouge of problem weld seam 8
Open, space width is carried out using hydraulic top to adjust up and down；Gouge mode flexibility is very big, can carry out all positon operation.If
, then can be blocked up because of rack-plate using gas cutting mode, and locus it is too high caused by gas pressure it is small the problems such as, formation is cut
Cut sagging.
4）Hydraulic top is jacked to being changed the upper and lower crown of rack away from the weld shrinkage for reserving certain distance；Jacking away from
Weld seam subsequently thermal shrinking quantity caused by welding is increased newly from upper and lower twice can be offset.First, its free shrink can be allowed, in reduction
Stress；Second, obtaining the space width in tolerance permitted range after the completion of ensure that welding, ensure that rack and pinion can be normal
Engagement.
5）Shown in Fig. 3, temporary support pipe 7 is set between the temporary support bracket 6 of step 2；
6）Gouge removes and is changed rack, to be measured before gouge, setting-out；Gouge mode is used in selection, and being can be eaily
Obtain wanted welding groove form.Groove face at least stays 3mm grinding process, it is therefore an objective to can get rid of influence and weld below
The carburized layer of process, naturally it is also possible to make groove face more smooth, be easy to fill the fusion of metal and mother metal during welding, reduce weldering
Connect the possibility being mingled with.
7）To the upper and lower twice seam of the rack newly installed, using the assembling successively of first suitable for reading, rear lower mouth, weld
Sequentially, i.e., seam under seam, then welding equipment in first welding equipment；Here abandoned that the program that can make to apply for checking and examination more simplifies " twice seam is same
When assembling apply for checking and examination simultaneously " method, be because：Separately welding, can allow in welding process, and the overall constraint (restraint) degree of structure is smaller,
Tension will not be formed between twice weld seam, such weld is accepted rate is easier to be guaranteed.And separately fill, weld, can be with
More flexibly by adjusting the welding sequence of each bar weld seam both sides, to ensure linearity.
8）Finally examine.Main MT, UT inspection including weld seam, the linearity of 20 teeth, camber inspection.Can be at 20
The parallel mode for drawing steel wire checks dimensional accuracy between tine length.
In step 4, when hydraulic top jacks, consider each seam 3mm of amount of contraction of weld seam, changed the upper and lower crown of rack
Away from the weld shrinkage for leaving 6mm.Because the distance of hydraulic top jacking can offset upper and lower twice, newly-increased weld seam subsequently welds
Connect caused thermal shrinking quantity.
The drilling platform leg rack renewed workmanship of the present invention, first plus on limiting plate limitation spud leg front, rear, left and right direction
Move freely, temporary support bracket is respectively welded on upper and lower main chord tube, puts forth effort for temporary support pipe, and hydraulic top jacking, this
The welding interior stress of other two racks for having welded completion of the weight of spud leg above sample interface and same spud leg will not
Big, the uncertain displacement in direction is caused to the joint of opening, the square work of former problem weld seam gouge is opened, utilizes hydraulic top
Space width is carried out to adjust up and down, hydraulic top is jacked to being changed the upper and lower crown of rack away from the weld contraction for reserving certain distance
Amount, the distance of jacking can offset upper and lower twice and increase weld seam subsequently thermal shrinking quantity caused by welding newly, then gouge removes and changed tooth
Bar, to the rack newly installed, to the upper and lower twice seam of the rack newly installed, connect in first welding equipment under seam, then welding equipment
Seam.
Whole spud leg rack renewed workmanship, welding quality is easy to control, overcomes the construction difficulty for the rack changed again.
Ensure that the spud leg rack of self-elevating drilling platform renews being smoothed out for work.
Claims (2)
1. the technique that a kind of pile legs of self-elevating drilling platform rack renews, it is characterised in that comprise the following steps：
1）Drilling platform leg is removed before being renewed rack, first plus limiting plate limits the freedom on its front, rear, left and right direction
It is mobile, make total can only upper and lower to movement；
2）Temporary support bracket is respectively welded on the upper and lower main chord tube for renewing rack；
3）The square work of former problem weld seam gouge is opened；
4）Hydraulic top is jacked to being changed the upper and lower crown of rack away from the weld shrinkage for reserving certain distance；
5）Temporary support pipe is set between the temporary support bracket of step 2；
6）Gouge removes and is changed rack；
7）To the upper and lower twice seam of the rack newly installed, using the order assembled, welded successively of first suitable for reading, rear lower mouth,
Seam under seam, then welding equipment in i.e. first welding equipment；
8）Finally examine；
Gouge is removed by before changing rack, has welded that front, rear, left and right occur between the upper and lower spud leg of limitation is relative being changed on rack
Mobile limiting plate, make upper and lower spud leg that the relative displacement of upper and lower both direction can only occur.
2. the technique that a kind of pile legs of self-elevating drilling platform rack according to claim 1 renews, it is characterised in that：Step
In 4, when hydraulic top jacks, the upper and lower crown of rack is changed away from the weld shrinkage for leaving 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008763.XA CN105436659B (en) | 2016-01-08 | 2016-01-08 | The technique that a kind of pile legs of self-elevating drilling platform rack renews |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610008763.XA CN105436659B (en) | 2016-01-08 | 2016-01-08 | The technique that a kind of pile legs of self-elevating drilling platform rack renews |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105436659A CN105436659A (en) | 2016-03-30 |
| CN105436659B true CN105436659B (en) | 2017-11-17 |
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| CN201610008763.XA Active CN105436659B (en) | 2016-01-08 | 2016-01-08 | The technique that a kind of pile legs of self-elevating drilling platform rack renews |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108723690B (en) * | 2017-04-19 | 2020-12-04 | 烟台铁中宝钢铁加工有限公司 | Process method for asymmetrically replacing half chord tube of main chord tube of pile leg |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB758244A (en) * | 1951-10-24 | 1956-10-03 | Graver Tank & Mfg Co Inc | Welding tool manipulating apparatus |
| FR1482943A (en) * | 1966-04-06 | 1967-06-02 | Technigaz | Process for the assembly by automatic welding of sheets and equipment for implementing said process |
| FR2857034B1 (en) * | 2003-07-02 | 2006-09-22 | Industeel France | METHOD FOR ASSEMBLING A SELF-LIFTING PETROL PLATFORM RACK |
| US7926694B2 (en) * | 2005-10-14 | 2011-04-19 | Enrique Franco | Apparatus for vertically manufacturing poles and columns |
| CN102029457B (en) * | 2010-12-01 | 2012-10-03 | 武昌船舶重工有限责任公司 | Vertical butt welding process of high-strength steel for ship structures |
| CN102699494B (en) * | 2012-07-04 | 2014-12-10 | 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 |
| CN203498830U (en) * | 2013-08-15 | 2014-03-26 | 中集海洋工程研究院有限公司 | Folding, limiting and tightening device for ultra-large truss type pile leg subsections |
| CN103406639A (en) * | 2013-08-20 | 2013-11-27 | 南通中新钢构重工有限公司 | Welding process for pile leg stereo sectional erection |
| CN204504600U (en) * | 2015-03-05 | 2015-07-29 | 烟台铁中宝钢铁加工有限公司 | For assistance platform and the bracing or strutting arrangement thereof of the welding of jack up drilling platform spud leg |
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