CN101576197B - Semicircular plate used for oil drilling platform leg and manufacture process thereof - Google Patents
Semicircular plate used for oil drilling platform leg and manufacture process thereof Download PDFInfo
- Publication number
- CN101576197B CN101576197B CN2009100858312A CN200910085831A CN101576197B CN 101576197 B CN101576197 B CN 101576197B CN 2009100858312 A CN2009100858312 A CN 2009100858312A CN 200910085831 A CN200910085831 A CN 200910085831A CN 101576197 B CN101576197 B CN 101576197B
- Authority
- CN
- China
- Prior art keywords
- pipe
- steel pipe
- carried out
- steel
- semi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a process for manufacturing a semicircular plate used for the oil drilling platform leg chord pipe, comprising the following steps of: continuously casting a molten steel with the composition complying with the requirement into a solid tube blank; processing the tube blank as a seamless steel pipe; and finally sawing the seamless steel pipe into the semicircular plate by longitudinal sawing operation. The invention also discloses a semicircular plate used for the oil drilling platform leg chord pipe. The process directly changes the existing technology of pressing semicircular plate by steel plate, adopts the mode of a formed steel pipe to segment and manufacture the semicircular plate and leads the process forming way to be different from the original type; the processing technology route is firstly created in the field; and the manufacture cost is greatly reduced as large-tonnage presses are not adopted.
Description
Technical field
The present invention relates to effective semi-circular plate of a kind of oil drilling platform leg string and manufacturing process thereof.
Background technique
Large-scale jack-up unit is used for the exploration and the exploitation of offshore oil/natural gas resource, and main platform body supports through spud leg.Spud leg is the English truss formula, is provided with the main chord tube of band tooth bar at the triangle place of pile leg structure, connects through support tube therebetween.Main chord tube comprises two relative semi-circular plates and tooth bar, and platform leg is in blank with the China that is manufactured on of semi-circular plate always.---the cut apart steel plate heat treatment of---steel plate is hot-forming through large tonnage pressing machine---semi-circular plate, finishing typing that the manufacturing process of external semi-circular plate mainly comprises: rolled plate.
Owing to domesticly do not have complete large tonnage pressing machine and supporting series of molds, so platform leg is with semi-circular plate dependence on import always.
Summary of the invention
The technical problem that the present invention will solve provides effective semi-circular plate of a kind of jack-up unit leg-chord and manufacturing process thereof, not only can guarantee the semi-circular plate high dimension precision, and the semi-circular plate overall performance is even.
In order to address the above problem; The manufacturing process that the invention provides the effective semi-circular plate of a kind of jack-up unit leg-chord comprises: composition is met the requirements of continuous casting of molten steel become solid pipe; Again pipe is processed into seamless steel pipe, through ripping the seamless steel pipe sawing is become semi-circular plate at last.
Preferably, said technology specifically comprises the steps:
Step 1, will smelt molten steel good, that composition has met the requirements of in the ladle and carry out continuous casting, form solid pipe with certain caliber through caster;
Step 2, pipe is carried out slow cooling heat treatment, eliminate pipe interior tissue stress;
Step 3, with the cold centering of pipe scale, specifically be meant through Band saw machine the pipe sawing is become to meet length requirement, again pipe one end end face center is got out internal point;
Step 4, with heating of pipe blank to the temperature that meets the drilling/rolling requirement, solid again pipe is through the Mannesmann piercing unit, drilling/rolling becomes hollow hollow billet; Hollow billet heating after will boring a hole then rolls into seamless steel pipe through the size-reducing mill group, and steel pipe is carried out modified heat treatment;
Step 5, steel pipe is aligned, carried out stabilization heat treatment again, to eliminate the structural stress that aligning back steel duct exists;
Step 6, through the mill boring machine inner and outer surface of steel pipe is carried out grinding, to eliminate defective and the iron scale that the outside exists in the steel pipe;
Step 7, longitudinally to steel pipe line, steel pipe is being carried out ripping, Tube Cutting is become two semi-circular plates of symmetry.
Preferably, carry out ripping through Sawsvertical band in the said step 7.
The present invention also provides a kind of jack-up unit leg-chord effective semi-circular plate; This semi-circular plate prepares through following technology: composition is met the requirements of continuous casting of molten steel become solid pipe; Again pipe is processed into seamless steel pipe, through ripping the seamless steel pipe sawing is become semi-circular plate at last.
The present invention has following advantage:
1, directly changes existing steel plate compacting semi-circular plate technology; Adopt the shaping steel pipe to cut apart and make the semi-circular plate mode, its process forming mode and original mode are completely different, and its processing technology routine is an initiative in this field; Owing to do not adopt large tonnage pressing machine, greatly reduce manufacture cost;
2, the steel pipe integral modified heat treatment of quenching, the material monolithic performance is uniform and stable, and the structural stress of steel duct has been eliminated in the just laggard line stabilization processing of essence, and after the Tube Cutting, buckling deformation does not take place in semi-circular plate, has guaranteed the semi-circular plate dimensional accuracy.And more serious buckling deformation after semi-circular plate carries out modified heat treatment, because semi-circular plate inner and outer surface curvature is different, takes place in original production technology, and smart positive back is because dimensional accuracy is overproof, and reject rate is higher.
3, on Sawsvertical band, carry out Tube Cutting, guarantee that in the Tube Cutting course of working, the saw blade traveling is steady, the sawing finished product accuracy is higher than the semi-circular plate precision of steel plate compacting.
Embodiment
Manufacturing process of the present invention mainly comprise the steps: electric furnace smelting → LF stove refining → vacuum outgas processing → continuously cast billet for pipe-making → pipe heat treatment → pipe figuring of surface, essence just → the cold centering → heating of pipe blank of pipe scale → perforation → sizing → heat treatment → sampling, service check → aligning → stabilization heat treatment → inside and outside mill → ultrasonic flaw detection → eddy current testing → crop end → inspection line → ripping → finished product inspection.Specifically:
At first carry out continuously cast billet for pipe-making, just through the pipe caster, pour in the casting machine tundish smelting molten steel good, that composition has met the requirements of in the ladle, through crystallizer, continuous casting tooling devices such as Blank drawing machine are pulled out the continuously cast billet for pipe-making of requirement up to specification.Its objective is and utilize existing tooling device, produce satisfactory continuously cast billet for pipe-making.
Next carry out pipe heat treatment, be about to the pipe that casting machine pulls out and be collected in together, carry out pipe slow cooling heat treatment then through roller-way.Its objective is adjustment pipe internal crystallization cast structure, eliminate pipe interior tissue stress.
Next carry out the cold centering of pipe scale, scale is through Band saw machine the pipe sawing to be become to meet length requirement, and cold centering is with the one end end face center of the pipe behind the scale, is drilled to a satisfactory internal point.Pipe scale, the cold centering of pipe are the front travel before the pipe hot piercing.
Next carry out heating of pipe blank, promptly refer to utilize the heating of pipe blank stove, to satisfactory drilling/rolling temperature, purpose is exactly in order to process by normal heat with heating of pipe blank.
Next bore a hole, perforation is produced and is adopted the mannesmann piercing technology mode, and through the Mannesmann piercing unit, drilling/rolling becomes hollow hollow billet with solid pipe.
Next carry out sizing, the hollow billet heating after being about to bore a hole through the size-reducing mill group, rolls into the seamless steel pipe of requirement up to specification.Its objective is the tolerance of size that changes and improve hollow hollow billet, improve the inner and outer surface quality of steel pipe.
Next carry out modified heat treatment, the heat treatment behind the sizing is the modified heat treatment of semi-finished product steel pipe, through steel pipe heating, hardening, tempering, changes the metal structure of steel duct, improves performance, reaches the technical standard requirement.
Next align, promptly through seven roller straighteners, double fished pipe aligned, and makes the tortuosity of steel pipe reach the standard-required of fished pipe.
Next carry out stabilization heat treatment, promptly eliminate the structural stress that aligning back steel duct exists, steel pipe is carried out temper.
Next carry out inside and outside mill,, the inner and outer surface of steel pipe is carried out grinding, eliminate the outside exists in the steel pipe defective and iron scale, make steel pipe reach the standard-required of fished pipe promptly through special-purpose mill boring machine.
Next check line, promptly before the sawing semi-circular plate, specification, the inner and outer surface quality of steel pipe are checked, on stand,, longitudinally rule then from two end points of diameter of steel tube.
Carry out ripping at last, promptly fished pipe is carried out sawing through Sawsvertical band.To guarantee in the time of sawing in the sawing process sawing processing line along rule and steadily carry out.When cutting, certificate in time adjust saw blade tension force, blade speed, and the board forward velocity is that sawing process is steady.
Through above-mentioned steps, promptly prepare satisfactory semi-circular plate.
Because above-mentioned steps no longer adopts the large-tonnage press machine, adopt the shaping steel pipe to cut apart and make the semi-circular plate mode, both greatly reduce manufacture cost, and can produce dimensional accuracy and intensity meets the requirements of semi-circular plate.
In sum; More than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, therefore; All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the manufacturing process of a semicircular plate used for oil drilling platform leg comprises: composition is met the requirements of continuous casting of molten steel become solid pipe, again pipe is processed into seamless steel pipe, through ripping the seamless steel pipe sawing is become semi-circular plate at last; Specifically comprise the steps:
Step 1, will smelt molten steel good, that composition has met the requirements of in the ladle and carry out continuous casting, form solid pipe with certain caliber through caster;
Step 2, pipe is carried out slow cooling heat treatment, eliminate pipe interior tissue stress;
Step 3, with the cold centering of pipe scale, specifically be meant through Band saw machine the pipe sawing is become to meet length requirement, again pipe one end end face center is got out internal point;
Step 4, with heating of pipe blank to the temperature that meets the drilling/rolling requirement, solid again pipe is through the Mannesmann piercing unit, drilling/rolling becomes hollow hollow billet; Hollow billet heating after will boring a hole then rolls into seamless steel pipe through the size-reducing mill group, and steel pipe is carried out modified heat treatment;
Step 5, steel pipe is aligned, carried out stabilization heat treatment again, to eliminate the structural stress that aligning back steel duct exists;
Step 6, through the mill boring machine inner and outer surface of steel pipe is carried out grinding, to eliminate defective and the iron scale that the outside exists in the steel pipe;
Step 7, longitudinally to steel pipe line, steel pipe is being carried out ripping, Tube Cutting is become two semi-circular plates of symmetry.
2. technology as claimed in claim 1 is characterized in that, carries out ripping through Sawsvertical band in the said step 7.
3. semicircular plate used for oil drilling platform leg, this semi-circular plate prepares through following technology: composition is met the requirements of continuous casting of molten steel become solid pipe, again pipe is processed into seamless steel pipe, through ripping the seamless steel pipe sawing is become semi-circular plate at last; Specifically comprise the steps:
Step 1, will smelt molten steel good, that composition has met the requirements of in the ladle and carry out continuous casting, form solid pipe with certain caliber through caster;
Step 2, pipe is carried out slow cooling heat treatment, eliminate pipe interior tissue stress;
Step 3, with the cold centering of pipe scale, specifically be meant through Band saw machine the pipe sawing is become to meet length requirement, again pipe one end end face center is got out internal point;
Step 4, with heating of pipe blank to the temperature that meets the drilling/rolling requirement, solid again pipe is through the Mannesmann piercing unit, drilling/rolling becomes hollow hollow billet; Hollow billet heating after will boring a hole then rolls into seamless steel pipe through the size-reducing mill group, and steel pipe is carried out modified heat treatment;
Step 5, steel pipe is aligned, carried out stabilization heat treatment again, to eliminate the structural stress that aligning back steel duct exists;
Step 6, through the mill boring machine inner and outer surface of steel pipe is carried out grinding, to eliminate defective and the iron scale that the outside exists in the steel pipe;
Step 7, longitudinally to steel pipe line, steel pipe is being carried out ripping, Tube Cutting is become two semi-circular plates of symmetry.
4. semicircular plate used for oil drilling platform leg as claimed in claim 3 is characterized in that, carries out ripping through Sawsvertical band in the said step 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100858312A CN101576197B (en) | 2009-06-01 | 2009-06-01 | Semicircular plate used for oil drilling platform leg and manufacture process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100858312A CN101576197B (en) | 2009-06-01 | 2009-06-01 | Semicircular plate used for oil drilling platform leg and manufacture process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101576197A CN101576197A (en) | 2009-11-11 |
| CN101576197B true CN101576197B (en) | 2012-04-18 |
Family
ID=41271208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100858312A Active CN101576197B (en) | 2009-06-01 | 2009-06-01 | Semicircular plate used for oil drilling platform leg and manufacture process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101576197B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157954B (en) * | 2011-12-09 | 2015-04-22 | 韶关市中机重工锻压有限公司 | Forging suppressing manufacturing technique of semi-circle plate for oil drilling platform spud legs |
| CN103157654B (en) * | 2011-12-09 | 2015-03-11 | 韶关市中机重工锻压有限公司 | Rolling manufacturing technique of semi-circle plate for oil drilling platform spud legs |
| CN102717168A (en) * | 2012-07-04 | 2012-10-10 | 上海振华重工集团(南通)传动机械有限公司 | Technology for manufacturing chord tube for ocean platform pile leg main coil |
| CN103464557B (en) * | 2013-09-06 | 2015-04-15 | 天津惠蓬海洋工程有限公司 | Self-elevating drilling platform spud leg semi-circular plate pressing method |
| CN103624488B (en) * | 2013-11-15 | 2016-02-10 | 南通润邦重机有限公司 | A kind of self-lifting offshore wind power job platform spud leg manufacturing process |
| CN104695410B (en) * | 2015-03-03 | 2017-04-12 | 山东钢铁股份有限公司 | Super-thick semi-chord plate section steel for offshore petroleum machinery as well as preparation method and application of super-thick semi-chord plate section steel |
| CN108057733A (en) * | 2016-11-07 | 2018-05-22 | 烟台铁中宝钢铁加工有限公司 | A kind of semifocal chord tube temperature transfer moulding method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144713A (en) * | 2007-10-18 | 2008-03-19 | 大连船舶重工集团有限公司 | Large-scale truss type stake leg segmentation data detection method |
| 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 |
-
2009
- 2009-06-01 CN CN2009100858312A patent/CN101576197B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144713A (en) * | 2007-10-18 | 2008-03-19 | 大连船舶重工集团有限公司 | Large-scale truss type stake leg segmentation data detection method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101576197A (en) | 2009-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576197B (en) | Semicircular plate used for oil drilling platform leg and manufacture process thereof | |
| CN102179681B (en) | Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically | |
| CN101811149B (en) | Manufacturing method of high alloy seamless steel tube | |
| CN103921065B (en) | A kind of manufacture method of automobile specified seamless steel pipe | |
| CN101585077B (en) | Cooling method for preventing microcracks on wheel steel continuous casting slabs | |
| CN101020190A (en) | Hot rolling process of seamless steel pipe | |
| CN101412082B (en) | Production method for preventing cracks on medium-carbon high manganese steel | |
| CN202438543U (en) | Punching and rolling equipment of high-alloy difficultly deformable seamless steel pipe | |
| CN101579703B (en) | New technique for manufacturing high alloy steel seamless pipe with heavy calibre by adopting pilger mill | |
| CN103817168B (en) | Drawing production process of monel alloy pipe | |
| CN102371288A (en) | Preparation method of high-precision and high-strength titanium alloy seamless tube | |
| CN105290282B (en) | A kind of manufacture method of superelevation cylinder part | |
| CN103464507B (en) | A kind of method of producing high-precision austenite seamless steel pipe | |
| CN102284486A (en) | Process for manufacturing seamless steel tubes by hot rolling | |
| CN101579702B (en) | New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology | |
| CN101020191A (en) | Hot rolling process of seamless steel pipe | |
| CN101020192A (en) | Hot rolling process of seamless steel pipe | |
| CN102962291A (en) | Method for forging and forming pipe die blank by pilgrim mill | |
| CN104841720A (en) | Method for producing large-caliber and thick-wall Cr15 bushed bearing by using steel ingot | |
| CN101579816B (en) | New method for manufacturing high alloy steel seamless pipe with heavy calibre by adopting steel pipe continuous rolling mill | |
| CN103157954B (en) | Forging suppressing manufacturing technique of semi-circle plate for oil drilling platform spud legs | |
| CN113020313A (en) | Ledeburite die steel seamless steel tube and preparation method thereof | |
| CN103157654B (en) | Rolling manufacturing technique of semi-circle plate for oil drilling platform spud legs | |
| CN102978365A (en) | Heat treatment method of large reducing forming pipe die | |
| CN102873100B (en) | Three-roller full-floating mandrel continuous pipe rolling mill and rolling process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder |