RU2527578C2 - PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 88,9×6,45×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE - Google Patents

PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 88,9×6,45×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE Download PDF

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RU2527578C2
RU2527578C2 RU2012155950/02A RU2012155950A RU2527578C2 RU 2527578 C2 RU2527578 C2 RU 2527578C2 RU 2012155950/02 A RU2012155950/02 A RU 2012155950/02A RU 2012155950 A RU2012155950 A RU 2012155950A RU 2527578 C2 RU2527578 C2 RU 2527578C2
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size
pipes
rolled
ingots
hot
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RU2012155950A (en
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Анатолий Васильевич Сафьянов
Александр Анатольевич Федоров
Владимир Яковлевич Осадчий
Владимир Петрович Пашнин
Евгений Юрьевич Шмаков
Владимир Сергеевич Баричко
Кирилл Николаевич Никитин
Николай Петрович Климов
Константин Эдуардович Бубнов
Александр Анатольевич Сафьянов
Александр Юрьевич Матюшин
Виктор Николаевич Еремин
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Открытое акционерное общество "Челябинский трубопрокатный завод"
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Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to production of pipes for extraction of gas and gas condensate in sulphur-bearing media. ESR process is used to smelt hollow 470×110×2700 or 430×105x×2700 mm ingots to be bored and turned to hollow 460×100×2700 and 420×95×2700 mm ingots-billets, respectively. Said ingots-billets are heated to ductility temperature and rolled at Pilger mill on taper mandrels to rerolled hot-rolled pipes. The latter are turned, bored and rolled at mill CPR to commercial oil-well tubing sized to 88.9×6.45×9000-10700 mm. Use of hollow ESR ingots allows reducing the metal input.
EFFECT: higher quality of pipes.
4 cl, 1 tbl

Description

The invention relates to pipe production, and in particular to a method for the production of seamless cold-deformed tubing of 88.9x6.45x9000-10700 mm in size, pipes of 108 × 18 mm in size, pipes for the manufacture of couplings for gas and gas condensate production in hydrogen sulfide-containing media and a production method seamless hot-rolled conversion pipes at TPU with pilgrim mills from hollow ingots of electroslag remelting of a corrosion-resistant alloy KhNZOMDB-Sh.

In pipe-rolling production, a method is known for producing hot-rolled commodity and conversion pipes of large and medium diameters from hard-to-deform steel grades in pipe-rolling plants with pilgrim mills from centrifugally cast hollow billets of stainless steel grades 08Х18Н12Т, 08Х18Н10Т, 08Х10Н16Т2 and 08Х10Н20Т69-ТУ-14 (ТГ), 08Х10Н20Т69-ТУ centrifugally cast hollow tubes made of steel grades 08X18H12T, 08X18H10T, 08X10H16T2 and 08X10H20T2 with a diameter of 530-650 mm, TU 14-3-1564-88 "Seamless hot-deformed pipes made of steel of the grades 08X10H20T2 and 08X10H16T2 for withdrawable systems", TI 1 58-Tr. TB 1-6-94 "Production of pipes from steel grades 08X10H20T2 and 08X10H16T2 according to TU 14-3-1564-88", TU 14-3-743-78 "Seamless hot-rolled pipes from steel grade 08X18H12T", TI 158 -Tr.TB1-63-98 "Production of seamless hot-rolled pipes from 08Kh18N12T steel for chemical engineering and for shirts of hydraulic cylinders of pilgerstan forgollers", TU 14-3-765-78 "Seamless hot-rolled pipes from stainless steel", TI 158-Tr. TB 1-69-98 "Production of seamless hot-deformed pipes from steel grade 08X18H12T for cylinders").

The disadvantage of this method is that the pipes after rolling have a large number of defects on the outer and inner surfaces in the form of captivity and friability, require subsequent machining (turning and boring) with the removal of metal 10-12 mm per side or 20-25 mm the wall. Hot rolled pipes measuring 402 × 45 mm are machined and bored to a size of 377 × 20 mm, i.e. more than 50% of the metal goes into shavings. Since hot rolled pipes roll with thick walls, i.e. with small extracts (µ = 2.0-3.5), then large grains occur in the microstructure of the pipe metal, and therefore the pipe metal has low mechanical properties and does not withstand the tests for intergranular corrosion (Section 2.8 TU 14-3-765 -78 states that the macrostructure of the metal of the pipes should be dense, without traces of shrinkage friability, delamination, cracks, voids), and the results of the initial tests for micro- and macrocontrol are final.

In the pipe industry, a method is known for the production of seamless hot-rolled conversion tubes from ESR ingots of corrosion-resistant steels with a diameter of 219-325 mm with a wall thickness of 20 to 50 mm, intended for cold processing, and commercial pipes with mechanical processing and subsequent grinding with improved surface quality from steel grade 08X18H10T measuring 219-325 mm with wall thicknesses from 10 to 25 mm (TU 14-3R-197-2001 "Seamless pipes from corrosion-resistant steels with high surface quality", TI 158-Tr. TB1-53-2002 " Making seamless hot formed pipes from corrosion-resistant steel grades with improved surface quality according to TU 14-3R-197-2001 "), as well as a method for the production of seamless hot-rolled pipes with a nominal diameter of 289, 341, 393 and 418 mm with wall thicknesses from 25 to 40 mm from EShR ingots of steel grades 08X18H10T and 08X18H12T according to TU 14-134-334 from corrosion-resistant steel grades for the manufacture of cold-deformed pipes (TU 14-158-130-2002 "Seamless hot-deformed steel pipes from corrosion-resistant steel grades for the manufacture of cold-deformed pipes" and TU 14-158-129-2002 "Steel pipes Seamless hot-deformed conversion of corrosion-resistant steel grades for the manufacture of cold-deformed pipes for nuclear power plants. "

The disadvantages of this method of production of seamless hot-rolled commodity and conversion pipes from ESR ingots of corrosion-resistant steels is that commodity and conversion hot-rolled pipes with a diameter of 219-325 mm on 8-16 "TPA are rolled from ESR ingots of 400-500 × 100 × 1750 mm in size for one piercing on a maximum mandrel with a diameter of 250 mm. When piercing ECHB drilled ingots of a given size of 08Kh18N10T steel, the piercing mill engine runs to the limit. The load reaches 7.5 kA (maximum 7.0 kA). Tubes rolled from sleeves with one piercing,Since both conversion and commercial, due to the presence of defects in the form of captives and small flaws, require machining (turning and boring). The expenditure coefficient of the metal exceeds 2.0. Rolling of pipes with a diameter of more than 325 mm is performed using double firmware, namely commodity Pipes 402x20 mm in size from 08Kh18N10T steel are produced according to the technology: ESR drilled ingots of 570-600 × 100 × 1650 mm in size are heated to plasticity temperature and stitched on a mandrel with a diameter of 250 mm in sleeves of 570-600 × 265 in. × 2040-1990 mm in size put in the oven hot or after cooling and repair, heated to a temperature of plasticity, and then stitched (rolled) in a piercing mill on a mandrel with a diameter of 375 mm in sleeves 570-600 × 390vn. × 3000-2770 mm, which are fed to a pilgrim mill and rolled into a conversion pipe size 420x40 mm in caliber 432 mm due to rolls reduction by 6-8 mm, i.e. reduce the clearance (groove) between the rolls. The load on the drive rolls of the piercing mill exceeds the limit, i.e. work is done on the verge of engine shutdown. There are cases and engine shutdowns. In this case, the rolls of the piercing mill are bred and the sleeve-mortar is taken out of the mill and transferred to the category of marriage. The expenditure coefficient of the metal during rolling of conversion pipes using this technology exceeds 2.5. It can be seen from the foregoing that this technology for the production of commodity and conversion pipes from corrosion-resistant hard-to-deform grades of steel and alloys is labor-consuming, energy-intensive and metal-intensive.

A well-known technical solution is also a method for the production of hot-rolled steel tubes from 20Kh25N25TYu-Sh steel with a size of 325 × 40 mm for the manufacture of water-cooled furnace rollers with a size of 295 × 22 × 2750 mm, including drilling and boring of ESR ingots with a size of 480 × 1600 mm and a diameter of 285 + 5 / -0 mm, heating them to the temperature of plasticity, rolling on pilgrim mills into 325x40 mm pipes on mandrels with an increased taper of 246/238 mm with a difference (gap) between the inner diameter of the drilled ingot shells and the maximum diameter of the mandrels are equal 40-45 mm, and a drawing coefficient µ = 3.4 (protocol No. 1031 for agreeing on the conditions for the supply of steel pipes of grade 20X25H25TYu-Sh dated 12/14/2000, and a letter of instruction for pilot industrial rolling of 325 × 40 hot rolled steel tubes mm from steel grade 20X25H25TYU-Sh).

The disadvantage of this method is the use of bored ingot shells with an inner diameter greater than the diameter of the mandrel by 40-45 mm, because with smaller gaps on the inner surface of the pipes defects are formed in the form of flaws and frequent "tightening" of the mandrels, even with increased taper. The operation of boring ingots with a diameter from 100 mm to 285-290 mm is laborious and leads to increased metal consumption, because when boring, 30 to 45% of the metal goes into shavings. The amount of chips increases with the diameter of the conversion pipe, i.e. the inner diameter of the ingot shells, and this ultimately leads to a significant increase in the cost of the finished product.

In the pipe industry, there is also a known method for the production of hot-rolled conversion tubes from hard-deformed grades of steel and alloys in plants with pilgrim mills, including drilling ESR ingots for a diameter of 100 ± 5 mm, heating them to a ductility temperature, expanding into hollow billets with a hood µ = 1.2 -1.8 without raising in diameter, turning and boring them to remove forging defects, heating them to the ductility temperature and rolling on pilgrim mills with a hood µ≤5.0 or expanding drilled ESR ingots into the floor f workpieces with a hood µ = 0.9-1.5 with a rise in diameter from 1.05 to 1.4 and rolling on pilgrim mills with a hood µ≤5.5 (RF Patent No. 2242302 from 20.12.2004, Cl. 7 B21B 21/04, Bull. No. 35).

The disadvantage of this method is the use of ESR drilled ingots as conversion billets, additional expansion and machining operations of expanded expanded billets, increased consumption of expensive metal in the chips, which ultimately leads to a significant increase in the cost of the finished product.

The closest technical solution is a method for the production of seamless cold-deformed tubing of 88.9 × 6.45 × 9000-10700 mm in size and 108x18 mm of conversion pipe for the manufacture of couplings from a corrosion-resistant alloy grade ХН30МДБ-Ш for gas and gas condensate in hydrogen sulfide-containing media from forged, drilled, machined billets of size 219 × 32 × 3000 mm along the routes: 219 × 32 - 168 × 25 - 140 × 18 - 114 × 12 - 88.9 × 6.45 and 219 × 32 - 168 × 27 - 133 × 22 - 108 × 18 mm (TU 14-1-5483-2004 "Seamless cold-deformed pipes and sleeve couplings woks from a corrosion-resistant alloy of the KhN30MDB-Sh (EK77-Sh) brand, TU 14-1-5484-2009 "Seamless tubing pipes with a diameter of 89 and 114 mm and couplings to them from a corrosion-resistant alloy of the EK77 - Sh brand" , TU 14-1-4745-89 "Billet pipe from a corrosion-resistant alloy of the brand ХН30МДБ (ЭК77)" and protocol No. 1558 of 06/29/2011. "Coordination of the conditions for the supply of a pipe billet from a corrosion-resistant alloy of the brand ХН30МДБ-ИШ (ЭК 77-ISH). "

The disadvantages of this method are the additional machining operations — turning the ESR ingots into ingot ingots, heating to the ductility temperature of the ingots — ESR blanks of 380 × 1200 mm in size, forging them into forgings of 240 × 3000 mm in size with a pitch of at least 2.5, turning of the forgings into billets with a size of 219x3000 mm, drilling in billets of a central hole with a subsequent bore to a diameter of 155 mm, rolling of conversion tubes - billets of 219 × 32 × 3000 mm in size at CPT mills into commodity pipes of 88.9 × 6.45 × 9000-10700 mm along the routes - 219 × 32 - 168 × 25 - 140 × 18 - 114 × 12 - 88.9 × 6.45 mm with relative wall compressions, respectively, δ 1t = 21.9%, δ 2t = 28.0%, δ 3t = 33.4% and δ 4T = 46.3%, and conversion tubes - billets with a size of 219 × 32 × 3000 mm into conversion coupling billets with a size of 108 × 18 mm along the routes - 219 × 32 - 168 × 27 - 133 × 22 - 108 × 18 mm with relative wall reductions δ 1m = 15.6%, δ 2m = 18.5%, and δ 3m = 18.2%, and therefore the increased consumption of expensive metal when rolling tubing 88.9x6.45x9000 - 10700 mm and 108 × 18 mm for the manufacture of couplings.

The objective of the proposed method is the exclusion from the technological process of operations - heating the ESR ingots for forging, forging ingots into forgings, machining - turning the forgings into billets, drilling in the billets of the central hole with subsequent boring to a predetermined wall thickness, reducing the relative wall compressions along the passages on HPT mills, reduction of metal consumption during redistribution of an ESR ingot — a commodity or conversion cold-rolled pipe, and therefore a reduction in the cost of tubing 88.9 × 6.45 in size × 9000-10700 mm and couplings to them.

The problem is achieved in that in the known method for the production of seamless cold-deformed tubing of 88.9 × 6.45 × 9000-10700 mm in size and 108 × 18 mm of conversion pipe for the manufacture of couplings from a corrosion-resistant alloy of the brand ХНЗОМДБ - Ш for production of gas and gas condensate in hydrogen sulfide-containing media, including casting ESR ingots 400 × 1200 mm in size, turning to a size of 380x1200 mm, heating to plasticity temperature, forging into forgings of 240x3000 mm in size with at least 2.5, forging of forgings into billets of 219x3 in size 000 mm, drilling in billets of the central hole with subsequent boring to a diameter of 155 mm, rolling of conversion billet pipes of size 219 × 32 × 3000 mm at HPT mills into commodity pipes of size 88.9 × 6.45 × 9000-10700 mm along the routes - 219 × 32 - 168 × 25 - 140 × 18 - 114 × 12 - 88.9 × 6.45 mm with relative wall compressions, respectively, δ 1t = 21.9%, δ 2t = 28.0%, δ 3t = 33 , 4% and δ 4t = 46.3%, and conversion billets of size 219 × 32 × 3000 mm into conversion coupling pipes of size 108 × 18 mm along the routes - 219 × 32 - 168 × 27 - 133 × 22 - 108 × 18 mm with a relative reduction δ 1m = 15.6%, δ = 18.5% 2m and 3m δ = 18.2%, holodnodeformirovann Tubing tubing 88.9 × 6.45 × 9000-10700 mm in size is produced from machined hot-rolled pig billets of 273x25x4750 mm in size along the -273 × 25 - 219 × 21 - 180 × 17 - 140 × 13 - 114 × routes 9 - 88.9 × 6.45 with relative wall compressions δ 1m = 16.0%, δ 2m = 19.1%, δ 3m = 23.5%, δ 4m = 30.8% and δ 5m = 28 , 8%, or from machined hot-rolled tube billets of 245x16x4000 mm in size along the routes - 245 × 16 - 219 × 13 - 168 × 10 - 140 × 8 - 88.9 × 6.45 mm with relative wall reductions δ 1t = 18 , 8%, δ 2t = 21.3%, 5δ 2t = 20,% and δ 4t = 19.4%, and sleeve couplings from hot-rolled mechanical ki of processed conversion tube blanks measuring 273 × 25 × 4750 mm along routes - 273 × 25 - 219 × 23 - 168 × 21 - 133 × 19.5 - 108 × 18 mm with relative wall reductions of δ 1 m = 8.0%, δ 2m = 8.7%, δ 3m = 7.1% and δ 4m = 7.4%, or from hot-rolled machined steel billets of 273 × 30 × 4600 mm in size along the routes - 273 × 30 - 245 × 27 - 219 × 24 - 168 × 22 - 133 × 20 -108 × 18 mm with relative wall compressions δ 1m = 10.0%, δ 2m = 11.1%, δ 3m = 8.3%, δ 4m = 9.1 % and δ 4m = 10.0%, conversion pipes 273 × 25 × 4750, 245 × 16 × 4000 and 273 × 30 × 4600 mm are machined by turning and boring of hot-rolled pipes, respectively 290 × 35 × 4750, 260 × 30 × 4000 and 288 × 45 × 4600 mm in size, red hot rolled pipes of 290 × 35,260 × 30 and 288 × 45 mm in size are produced on TPU with pilgrim mills from hollow ingot blanks ESRs respectively 460 × 100 × 2700 and 420 × 95 × 2700 mm according to the technology: hollow ESR ingots of 470 × 110 × 2700 and 430 × 105 × 2700 mm in size are cast, which are turned and bored to a size of 460 × 100 × 2700 mm and 420 × 95 × 2700 mm, heated to the temperature of ductility and rolled on a pilgrim mill on conical mandrels with a diameter of 219/224 and 199 × 204 mm, respectively, into red hot rolled pipes p sizes 290 × 35 × 9500, 260 × 30 × 8000 and 288 × 45 × 4600 mm, the conversion pipes 290 × 35 × 9500 and 260 × 30 × 8000 mm are cut into two pipes - Krat of equal length, and then grind and bored into size 275 × 25 × 4750,245 × 30 × 4000 and 273 × 30 × 4600 mm, hollow ingot blanks ESRs of size 460 × 100 × 2700 and 420 × 95 × 2700 mm are placed in one row on the grates of the method furnaces at a temperature of 750- 800 ° C, for 1.0-1.5 hours they are heated to a temperature of 450-500 ° C, and then evenly heated to a temperature of 1180-1200 ° C at a speed of 2.2 - 2.4 ° C per minute with uniform pitching from 22 to 8 the window in 20-22 minutes at an angle of ≈290-300 ° and 320-330 °, respectively incubated at a temperature of 1180-1200 ° C for 0.45-1.0 hours with uniform tilting in 12-15 minutes from the 8th to the 4th window, from the 4th window they turn over into the furnace pit and pass out from the furnace with the temperature of the center of the ingot billets is 1180-1200 ° C, after discharge from the furnace, the hollow ingot billets of the ESR on the ingot trolley are blown with compressed air, the lubricant is supplied inside as a mixture of graphite with sodium chloride weighing 1.0-1.5 kg and transferred by crane to the receiving trolley of the pilgrim mill, the hot-rolled steel tubes of 290 × 35 × 9500, 26030 × 8000 and 288 × 45 × 4600 mm in size are rolled into a shaft on a pilgrim mill with calibers of 306, 280, and 295 mm, respectively, with hollow ingot blanks fed into the deformation zone, respectively, 20–22, 18–20, and 22–25 mm and hoods µ = 3.93, µ = 4.385, and µ = 2.767.

A comparative analysis of the proposed solution with the prototype shows that the claimed method differs from the known one in that cold-deformed tubing with a size of 88.9 × 6.45 × 9000-10700 mm is made from machined hot-rolled pig billets with a size of 273 × 25 × 4750 mm along the routes - 273 × 25 - 219 × 21 - 180 × 17 - 140 × 13 - 114 × 9 - 88.9 × 6.45 with relative wall reductions δ 1t = 16.0%, δ 2t = 19.1% , δ 3t = 23.5%, δ 4t = 30.8% and δ 5t = 28.8%, or from machined hot-rolled pipe billets of 245 × 16 × 4000 mm in size along the routes - 245 × 16 - 219 × 13 - 168 × 10 - 140 × 8 - 88.9 × 6.45 mm with relative wall compressions δ 1t = 18.8%, δ 2t = 21.3%, δ 3t = 20,% and δ 4t = 19 , 4%, and clutch conversion pipes from hot-rolled mechanically processed conversion pipe billets of 273 × 25 × 4750 mm in size along routes - 273 × 25 - 219 × 23 - 168 × 21 - 133 × 19.5 - 108 × 18 mm with relative reductions along the wall δ 1m , 0%, δ 2m , 7%, δ 3m = 7.1% and δ 4m = 7.4% or from hot-rolled mechanically processed conversion tube blanks measuring 273 × 30 × 4600 mm along routes 273 × 30 - 245 × 27 - 219 × 24-168 × 22 - 133 × 20 -108 × 18 mm with relative wall compressions δ 1m = 10.0%, δ 2m = 11.1%, δ 3m = 8.3%, δ = 9.1% 4m and 5m δ = 10.0%, conversion pipes 273 × 25 × 4750, 245 × 16 × 4000 and 273 × 30 × 4600 mm are machined by turning and boring hot-rolled conversion pipes, respectively 290 × 35x 4750, 260 × 30 × 4000 and 288 × 45 × 4600 mm, hot-rolled chimneys 290 × 35, 260 × 30 and 288 × 45 mm in size are produced on TPU with pilgrim mills from hollow ingot-blanks of ESRs with dimensions of 460 × 100 × 2700 and 420 × 95 × 2700 mm, respectively : hollow ESR ingots of 470 × 110 × 2700 and 430 × 105 × 2700 mm are cast, which are turned and bored to a size of 460 × 100 × 2700 mm and 420 × 95 × 2700 mm, heated to tempera ductility ducts and rolled on a pilgrim mill on conical mandrels with a diameter of 219/224 and 199 × 204 mm, respectively, into hot-rolled steel tubes in sizes 290 × 35 × 9500, 260 × 30 × 8000 and 288 × 45 × 4600 mm, steel tubes in sizes 290 × 35 × 9500 and 260 × 30 × 8000 mm are cut into two pipes - a slab of equal length, and then turned and bored to a size of 275 × 25 × 4750, 245 × 30 × 4000 and 273 × 30 × 4600 mm, ESR hollow ingots-blanks of size 460 × 100 × 2700 and 420 × 95 × 2700 mm are planted in one row on the grates of the method furnaces at a temperature of 750-800 ° C, heated to a temperature of 450-500 ° C for 1.0-1.5 hours, and then evenly on heated to a temperature of 1180-1200 ° C at a speed of 2.2-2.4 ° C per minute with a uniform pitching from 22 to 8 the window in 20-22 minutes at an angle of ≈290-300 ° and 320-330 °, respectively, withstand at a temperature of 1180-1200 ° C for 0.45-1.0 h with uniform pitching in 12-15 minutes from the 8th to the 4th window, from the 4th window they turn over into the furnace pit and pass out from the furnace with a center temperature ingot billets 1180-1200 ° C, after discharge from the furnace hollow ingot billets ESR on the ingot trolley are blown with compressed air, lubricant is supplied inside as a mixture of graphite with sodium chloride weighing ≈1.0-1.5 kg and transferred by crane to receiving trolley of a pilgrim mill, hot-rolled steel tubes of 290 × 35 × 9500, 260 × 30 × 8000 and 288 × 45 × 4600 mm in size on a pilgrim mill are rolled in rolls with calibres of 306, 280 and 295 mm, respectively, with hollow ingot blanks supplied to the hearth deformations, respectively, 20-22, 18-20 and 22-25 mm and hoods µ = 3.93, µ = 4.385 and µ = 2.767. Thus, the claimed method meets the criterion of "inventive step".

Comparison of the claimed solution (method) not only with the prototype, but also with other technical solutions in this technical field, did not reveal the signs that distinguish the claimed solution from the prototype, which allows us to conclude that the patentability condition is “inventive step”.

The method was tested on a tube-rolling installation with 8-16 "pilgrim mills and the KhPT 250 mill of ChTPZ OJSC. Six billets with a size of 219 × 32 × 3000 mm were obtained in the production, obtained by machining forgings with a size of 240 × 3000 mm (turning of forgings into billets of size 219 × 3000 mm, followed by drilling and boring to a size of 219 × 32 × 3000 mm) - the existing technology and 12 hot-rolled conversion tubes 273 × 25 × 4750 mm in size obtained by machining - turning and boring of hot-rolled tubes of 290 × 35 × 9500 mm rolled at TPU 8-16 "with pilgrim st ESR hollow ingots with dimensions of 460 × 100 × 2700 mm - the proposed technology. According to the proposed technology, out of ten conversion pipes with a size of 273 × 4750 mm, 40 tubing pipes with a size of 88.9 × 6.45 × 10700 mm with a total weight of 5757 kg were rolled at a KhPT 250 mill, and two pipes with four pipes with a size of 108 × 18 × 7400 mm for the manufacture of couplings. The total expenditure coefficient of metal for tubing was 2.144, and for pipes with a size of 108 × 18 mm for the manufacture of couplings - 2.027. According to the existing technology, 5 billets with a size of 219 × 32 × 3000 mm were rolled at the KhPT 250 mill into commodity tubing. Received 142.5 m of pipes with a total weight of 1917 kg. The expenditure coefficient of the metal in the pipes of this batch was 3.182 with an average pipe length of 9500 mm. Four tubes of 108 × 18 × 7400 mm total weight 393 kg were rolled from a billet with a size of 219 × 32 × 3000 mm at the KhPT 250 mill. The total expenditure coefficient of the metal from the ESR ingot of 400 × 1200 mm in size to the coupling pipe of 108 × 18 mm in size was 3.185. Data on the production of tubing 88.9 × 6.45 and sleeve 108 × 18 mm by existing and proposed technologies are given in table No. 1.

Table 1. Type technologist. The size of cold-smoked pipes (mm) ESR ingots size (mm) amount Pipe Size
after mekhobr. (mm)
Size of hot-smoked pipes (mm) Pipe delivery
PC. Weight (kg.) m kg c / o metal Creatures. 88.9 × 6.45 × 9000 400 × 1200 5 6100 219 × 32 × 3000 - 142.5 1917 3,182 118 × 18 n d 400 × 1200 one 1220 219 × 32 × 3000 - 9.55 383 3,185 Predag. 88.9 × 6.45 × 9000 460 × 100 × 2700 5 12346 273 × 30 × 4750 290 × 35 × 9500 428.0 5757 2,144 118 × 18 n d 460 × 100 × 2700 one 2469 273 × 30 × 4750 290 × 35 × 9500 29.6 1218 2,027

From table 1 it is seen that in the production of tubing of 88.9 × 6.45 in accordance with the proposed technology, a reduction in the expenditure coefficient of metal by 1038 kg per ton of pipe was obtained with a simultaneous increase in the length of commodity pipes by 12.6%, and in production sleeve pipes with a size of 108 × 18 mm reduction in the expenditure coefficient of the metal by 1155 kg per ton of pipe.

Thus, the table shows that in the production of pipes according to the proposed method from ESW hollow ingots, followed by their rolling at 8-16 "TPU with pilgrim mills into hot-rolled pipes and machining by turning and boring them into conversion pipes for their subsequent rolling on the mill HPT 250 into commodity tubing 88.9 × 6.45 × 10700 mm and 108 × 18 mm pipes for the manufacture of couplings in comparison with the existing technology according to TU 14-1-5483-2004 and TU 14-1-5484 -2009 a decrease in metal consumption by 1038 and 1155 kg respectively a ton of commodity tubing and pipes for the manufacture of couplings due to the exception of the operation of forging ESR ingots into forgings, machining of forgings into billets and drilling a central hole in the billets with subsequent boring for cold rolling.

Using the proposed method for the production of seamless cold-deformed tubing of 88.9 × 6.45 × 9000-10700 mm in size and 108 × 18 mm of conversion pipe for the manufacture of couplings from a corrosion-resistant alloy of the grade ХН30МДБ-Ш for gas and gas condensate production hydrogen sulfide-containing media will reduce metal consumption by eliminating the operation of forging ESR ingots into forgings, machining the forgings into billets and drilling a central hole in the billets with subsequent boring for cold rolling, ul to increase the quality of pipes by reducing the relative wall compressions along the aisles, and therefore reduce the cost of tubing of this assortment.

Claims (4)

1. Method for the production of seamless cold-deformed tubing of 88.9 × 6.45 × 9000-10700 mm in size from a corrosion-resistant alloy of the grade ХН30МДБ-Ш, including melting by electroslag remelting of hollow ingots of 470 × 110 × 2700 mm or 430 × 105 × 2700 mm, boring and turning of hollow ingots into hollow ingots-blanks of respectively 460 × 100 × 2700 mm and 420 × 95 × 2700 mm, heating of ingots-blanks to the temperature of plasticity, rolling on a pilgrim mill on conical mandrels into hot-rolled steel tubes of size 290 × 35 × 9500 mm or 260 × 30 × 8000 mm, cutting hot rolled tubes into two pipes of equal length, boring and turning hot rolled tubes into billets of 273 × 25 × 4750 mm or 245 × 16 × 4000 mm, respectively, and rolled at the HPT mill into 88.9 × commodity tubing 6.45 × 9000-10700 mm, and rolling at the HPT mill, the conversion of pipe billets of 273 × 25 × 4750 mm in size is carried out along the routes 273 × 25 - 219 × 21 - 180 × 17 - 140 × 13 - 114 × 9 - 88.9 × 6.45 with relative wall compressions δ 1t = 16.0%, δ 2t = 19.1%, δ 3t = 23.5%, δ 4t = 30.8%, δ 5t = 28.8%, and 245 × 16 conversion pipe billets 4000 mm - the routes 245 × 16 - 13 × 219 - 168 × 10 - 8 × 140 - 6.45 × 88.9 with relative reduction of wall δ = 18.8% 1t, δ 2t = 21.3%, δ 3t = 20.0%, δ 4t = 19.4%.
2. The method according to claim 1, characterized the fact that they carry out the hollow ingots-blanks ESR size 460 × 100 × 2700 and 420 × 95 × 2700 mm in a row on the grates of the furnace at a temperature of 750-800 ° C, heated to a temperature of 450-500 ° C for 1, 0-1.5 hours, and then uniformly heated to a temperature of 1180-1200 ° C at a speed of 2.2-2.4 ° C per minute with a uniform pitching from 22 to 8 the window in 20-22 minutes at an angle, respectively 290- 300 ° and 320-330 °, incubated at a temperature of 1180-1200 ° C for 0.45-1.0 hours with uniform pitching in 12-15 minutes from the 8th to the 4th window, and from the 4th window turn over into the pit of the furnace and issue from the furnace with a temperature the center of the ingot billet 1180-1200 ° C.
3. The method according to claim 2, characterized the fact that after discharge from the furnace the hollow ingots-blanks of the ESR on the ingot trolley are blown with compressed air, 1.0-1.5 kg of lubricant in the form of a mixture of graphite with sodium chloride is fed into the ingots-blanks, and then they are transferred by crane to the receiving trolley of the pilgrim mill .
4. The method according to 3, characterized the fact that hot rolled hot-rolled pipes of 290 × 35 × 9500 and 260 × 30 × 8000 mm sizes are produced on a pilgrim mill in rolls with calibres of 306 and 280 mm, respectively, with hollow ingot blanks fed into the deformation zone, respectively m = 20-22 and m = 18-20 mm and hoods, respectively, µ = 3.93 and µ = 4.39.
RU2012155950/02A 2012-12-21 2012-12-21 PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 88,9×6,45×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE RU2527578C2 (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2613806C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD FOR PRODUCING COLD-DEFORMED COUPLING PIPES OF 187,7×25×12300-12900 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613813C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 108×18 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613807C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 114,3×6,88 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613809C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 187,7×25×8300- 8500 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2614476C1 (en) * 2016-03-22 2017-03-28 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 88,9 ×6,45 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
RU2614477C1 (en) * 2016-03-22 2017-03-28 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 132,1 × 18 × 11.750-12.350 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2615925C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 114,3x6,88 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2615924C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED PIPES OF 88,9x6,45x9000-10700 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2639183C1 (en) * 2017-02-17 2017-12-20 Комаров Андрей Ильич METHOD OF PRODUCING SEAMLESS COLD-DEFORMED COUPLING PIPES OF 88,9 × 6,45 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
RU2714355C1 (en) * 2019-10-08 2020-02-14 Открытое Акционерное Общество "Тяжпрессмаш" Method for production of seamless pipes of large diameter from structural steels

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798071A (en) * 1986-06-25 1989-01-17 Kocks Technik Gmbh & Co. Seamless tube production
EP0842715A1 (en) * 1996-04-19 1998-05-20 Sumitomo Metal Industries, Ltd. Seamless steel pipe manufacturing method and equipment
RU2242302C2 (en) * 2003-01-14 2004-12-20 ОАО "Челябинский трубопрокатный завод" Method for producing hot rolled tubes of large and mean diameters of hard-to-form steels and alloys in tube rolling plants with pilger mills
RU2306991C2 (en) * 2005-05-11 2007-09-27 ОАО "Челябинский трубопрокатный завод" Method for producing hot rolled commercial and conversion tubes of large- and mean-diameters of hard-to-form steels and alloys in tube rolling plants with pilger mills
RU2464325C1 (en) * 2011-03-22 2012-10-20 ОАО "Первоуральский новотрубный завод" Cold deformed pipe manufacturing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4798071A (en) * 1986-06-25 1989-01-17 Kocks Technik Gmbh & Co. Seamless tube production
EP0842715A1 (en) * 1996-04-19 1998-05-20 Sumitomo Metal Industries, Ltd. Seamless steel pipe manufacturing method and equipment
RU2242302C2 (en) * 2003-01-14 2004-12-20 ОАО "Челябинский трубопрокатный завод" Method for producing hot rolled tubes of large and mean diameters of hard-to-form steels and alloys in tube rolling plants with pilger mills
RU2306991C2 (en) * 2005-05-11 2007-09-27 ОАО "Челябинский трубопрокатный завод" Method for producing hot rolled commercial and conversion tubes of large- and mean-diameters of hard-to-form steels and alloys in tube rolling plants with pilger mills
RU2464325C1 (en) * 2011-03-22 2012-10-20 ОАО "Первоуральский новотрубный завод" Cold deformed pipe manufacturing method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2613806C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD FOR PRODUCING COLD-DEFORMED COUPLING PIPES OF 187,7×25×12300-12900 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613813C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 108×18 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613807C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 114,3×6,88 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2613809C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 187,7×25×8300- 8500 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2614476C1 (en) * 2016-03-22 2017-03-28 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 88,9 ×6,45 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
RU2614477C1 (en) * 2016-03-22 2017-03-28 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 132,1 × 18 × 11.750-12.350 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2615925C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 114,3x6,88 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2615924C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED PIPES OF 88,9x6,45x9000-10700 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ" GRADE
RU2639183C1 (en) * 2017-02-17 2017-12-20 Комаров Андрей Ильич METHOD OF PRODUCING SEAMLESS COLD-DEFORMED COUPLING PIPES OF 88,9 × 6,45 mm SIZE FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE
RU2714355C1 (en) * 2019-10-08 2020-02-14 Открытое Акционерное Общество "Тяжпрессмаш" Method for production of seamless pipes of large diameter from structural steels

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