RU2523398C1 - PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 114,3×6, 8×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE - Google Patents

PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 114,3×6, 8×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE Download PDF

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RU2523398C1
RU2523398C1 RU2012153537/02A RU2012153537A RU2523398C1 RU 2523398 C1 RU2523398 C1 RU 2523398C1 RU 2012153537/02 A RU2012153537/02 A RU 2012153537/02A RU 2012153537 A RU2012153537 A RU 2012153537A RU 2523398 C1 RU2523398 C1 RU 2523398C1
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size
pipes
rolled
ingots
hot
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RU2012153537A (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: metallurgy.
SUBSTANCE: hollow ingots sized to 470×110×2700 or 430×105×2700 mm are ESR cast. Said ingots are turned and bored to hollow ingots-billets sized to 460×100×2700 and 420×95×2700 mm. 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 "ХПТ" to commercial oil-well tubing sized to 114.3×6.88×9000-10700 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 114.3 × 6.88 × 9000-10700 mm and pipes of 132.1 × 18 mm in size for the manufacture of couplings for gas and gas condensate production in hydrogen sulfide-containing media, and the method of production of seamless hot-rolled conversion pipes on TPU with pilgrim mills from hollow ingots of electroslag remelting of a corrosion-resistant alloy ХН30МДБ - Ш.

In pipe-rolling production, a method is known for producing hot-rolled commodity and conversion pipes of large and medium diameters from hardly deformable steel grades in pipe-rolling plants with pilgrim mills from centrifugally cast hollow billets of stainless steel grades 08Х18Н12Т, 08Х18Н10Т, 08Х10Н16Т2 and 08Х10Н20-369 (08Х10Н20-369 "Centrifugally cast hollow tube blanks from steel grades 08X18H12T, 08X18H10T, 08X10H16T2 and 08X10H20T2 with a diameter of 530-650 mm", TU 14-3-1564-88 "Seamless hot-deformed pipes from steel of the grades 08X10H20T2 and 08X10H16T2 for retractable systems", 158-Tr. TB1-6-94 "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. TB 1-63-98 "Production of seamless hot-rolled pipes from steel grade 08Kh18N12T 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 in the microstructure of the pipe metal there are large grains, and, therefore, the pipe metal has low mechanical properties and does not withstand tests for intergranular corrosion, (clause 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 commodity pipes with mechanical processing and subsequent grinding with improved surface quality from steel 08Kh18N10T grades 219-325 mm in size with wall thicknesses from 10 to 25 mm (TU 14-3R-197-2001 "Seamless pipes from corrosion-resistant steels with increased surface quality", TI 158-Tr. TB1-53-2002 "Production seamless hotter 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 Hot steel making sutures from corrosion resistant steel grades for the manufacture of cold 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 mechanical processing (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 402 × 20 mm in size from 08Kh18N10T steel are produced according to the technology: drilled ESR 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, which are placed in the oven hot or after cooling and repair is heated to a temperature of plasticity, and then flashed (rolled) in a piercing mill on a mandrel with a diameter of 375 mm in sleeves 570-600 × ext. 390 × 3000-2770 mm, which are fed to a pilgrim mill and rolled into redox pipes of size 420 × 40 mm in caliber 432 mm due to roll 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-consuming 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 a temperature of plasticity, rolling on pilgrim mills into pipes of 325 × 40 mm in size on mandrels with an increased taper of 246/238 mm with a difference (gap) between the inner diameter of the bored shells and the maximum diameter of the mandrels are equal m 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 indicating pilot-industrial rolling of hot-rolled steel tubes measuring 325 × 40 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 pipe defects are formed in the form of flaws and frequent "tightening" of the mandrels, even with increased taper. The operation of boring ingots from a diameter of 100 mm to 285-290 mm is laborious and leads to increased consumption of metal, 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. This method is aimed at manufacturing water-cooled rollers from steel 20Kh25N25TYu-Sh and does not solve the technological issues of the production of tubing 114.3 × 6.88 × 9000-10700 mm and pipes for the manufacture of couplings 132.1 × 18 mm in size from KhN30MDB alloy .

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 with a size of 114.3 × 6.88 × 9000-10700 mm and a conversion pipe with a size of 132.1 × 18 mm for the manufacture of couplings from a corrosion-resistant alloy grade ХН30МДБ-Ш for mining gas and gas condensate in hydrogen sulfide-containing media from forged, drilled, machined billets of 273 × 30 × 3000 mm in size along the routes: 270 × 30-219 × 24-180 × 18-140 × 12-114.3 × 6.88 and 273 × 32 mm along the routes: 273 × 32-219 × 27-168 × 22-132.1 × 18 mm (TU 14-1-5483-2004 "Seamless cold-deformed pipes and coupling blanks from a corrosion-resistant alloy of the brand ХН30МДБ-Ш (ЭК77-Ш) ", TU 14-1-5484-2009" Seamless pump-compressor pipes with a diameter of 89 and 114 mm and couplings to them from a corrosion-resistant alloy of the brand ЭК77 - Ш " TU 14-1-4745-89 "Pipe billets made of 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 additional machining operations — turning of ESR ingots of size 480 × 1200 mm into ingots-blanks of size 460 × 1200 mm, heating to plasticity temperature of ingots-blanks of ESRs, forging them into forgings of size 290 × 3000 mm with a pitch of at least 2 5, turning of forgings into billets of 273 × 3,000 mm in size, drilling in the billets of a central hole with subsequent boring to a diameter of 213 mm, rolling of conversion tubes - billets of 273 × 30 × 3,000 mm in size at CPT mills into 114.3 × 6 commodity pipes , 88 × 9000-10700 mm along the routes -273 × 30- 219 × 24-180 × 18-140 × 12-114.3 × 6.88 mm with relative wall compressions, respectively, δ 1t = 20.0%, δ 2t = 25.0%, δ 3t = 33.4% and δ 4t = 42.7%, and conversion billets of 273 × 32 × 3000 mm in size into conversion sleeve billets of 132.1 × 18 mm along routes — 273 × 32-219 × 27-168 × 22-132.1 × 18 mm with relative wall reductions δ 1m = 15.6%, δ 2m = 18.5%, and δ 3m = 18.2%, and therefore, increased consumption of expensive metal when rolling tubing 114.3 × 6.88-4.506, and when rolling pipes 132.1 × 18 mm in size for the manufacture of couplings - 3.508.

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 the redistribution of an ESR ingot — a commodity or conversion cold-rolled pipe, and, consequently, a reduction in the cost of tubing pipes of 114.3 × 6 in size, 88 mm and pipes for the manufacture of couplings measuring 132.1 × 18 mm.

The problem is achieved in that in the known method for the production of seamless cold-deformed tubing of 114.3 × 6.8889000-10700 mm in size and redistributable pipe of 132.1 × 18 mm in size for the manufacture of couplings from a corrosion-resistant alloy of the grade ХН30МДБ-Ш for gas and gas condensate production in hydrogen sulfide-containing media, including casting ESR ingots of size 480 × 1200 mm, turning to size 460 × 1200 mm. heating to plasticity temperature, forging into forgings of 290 × 3000 mm in size with a draft of at least 2.5, turning of forgings into billets of 273 × 3000 mm in diameter, drilling in billets of a central hole with subsequent boring to a diameter of 213 mm, rolling of billet pipes of size 273 × 30 × 3000 mm at the HPT mills into commodity pipes of 114.3 × 6.88 × 9000-10700 mm in size along the routes - 273 × 30-219 × 24-180 × 18-140 × 12-114.3 × 6.88 mm with relative wall compressions, respectively, δ 1t = 20.0%, δ 2t = 25.0%, δ 3t = 33.4% and δ 4t = 42.7%, and conversion billets of 273 × 32 × 3000 mm in size coupling glands 132.1 × 18 mm woks along the routes - 273 × 32-219 × 27-168 × 22-132.1 × 18 mm with relative reductions of δ 1m = 15.6%, δ 2m = 18.5%, and δ 3m = 18.2%, cold-deformed tubing of 114.3 × 6.88 × 9000-10700 mm in size is produced from machined hot-rolled conversion billets of 273 × 25 × 4750 mm in size along the routes of 273 × 25-219 × 20 -180 × 15-140 × 10-114.3 × 6.88 with relative wall compressions δ 1t = 20.0%, δ 2t = 25.0%, δ 3t = 33.3% and δ 4t = 31.2% or from machined hot-rolled tube billets of 245 × 16 × 2800 and 245 × 16 × 5200 mm in size along the routes - 245 × 16-219 × 13-168 × 11-140 × 9-114.3 × 6.88 mm with with significant wall compressions, δ 1t = 18.8%, δ 2t = 15.4%, δ 3t = 18.2% and δ 4t = 23.6%, and sleeve couplings from hot-rolled mechanically machined conversion tube blanks of 300 × 30 × 3800 mm along the routes - 300 × 30-273 × 27-219 × 24-168 × 22-132.1 × 18 mm with relative wall reductions δ 1m = 10.0%, δ 2m = 11.1%, δ 3m = 12.5 and δ 4m = 14.3%, or from hot-rolled mechanically processed pig billets 273 × 30 × 4600 mm in size along the routes - 273 × 30-245 × 27-219 × 24-168 × 21-132, 1 × 18 mm with relative wall compressions δ 1m = 10.0%, δ 2m = 11.1%, δ 3m = 12.5 and δ 4m = 14.3%, conversion tubes 273 × 25 × 4700, 24 5 × 16 × 2800, 245 × 16 × 5200, 300 × 30 × 3200 and 273 × 30 × 4600 mm are produced by machining - turning and boring of hot-rolled conversion tubes, respectively 290 × 35, 260 × 30, 310 × 40 and 288 × 45 mm, hot-rolled chimneys of sizes 290 × 35, 260 × 30, 310 × 40 and 288 × 45 mm are produced on TPU with pilgrim mills from hollow ingot blanks ESRs with sizes of 460 × 100 × 2700 and 420 × 95, respectively × 2700 mm according to the technology: 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 ductility temperature and they melt in a pilgrim mill on conical mandrels with a size of 219/224, 199 × 204 and 230/235 mm, respectively, into red hot rolled pipes of 290 × 35 × 9500, 260 × 30 × 8000, 310 × 40 × 7600 and 288 × 45 × 4600 mm, hollow ingots-blanks of sizes 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 × С, heated to a temperature of 450 for 1.0-1.5 hours -500 ° C, 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 °, withstand at a pace temperature 1180-1200 ° С for 0.45-1.0 hours 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 the center temperature ingot billets 1180-1200 ° C, after delivery from the furnace, hollow ingot billets on an 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 then transferred to a crane by receiving trolley of the pilgrim mill, hot-rolled steel tubes of 290 × 35 × 9500, 260 × 30 × 8000, 310 × 40 × 7600 and 288 × 45 × 4600 mm in size on a pilgrim mill are produced in rolls with calibers, respectively, 306, 280 and 315 mm with feeds of m hollow ingots-blanks in the deformation zone, respectively. 22-24, 20-22, 22-24 and 24-26 mm and hoods μ = 3.95, μ = 4.385, μ = 2.767 and μ = 3.267.

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 pipes with a size of 114.3 × 6.88 × 9000-10700 mm are made from machined hot-rolled pig billets with a size of 273 × 25 × 4750 mm along the routes - 273 × 25-219 × 20-180 × 15-140 × 10-114.3 × 6.88 with relative wall compressions δ 1t = 20.0%, δ 2t = 25.0%, δ 3t = 33.3% and δ 4t = 31.2% or from machined hot-rolled tube billets of 245 × 16 × 2800 and 245 × 16 × 5200 mm in size along the routes - 245 × 16-219 × 13-168 × 11-140 × 9-114.3 × 6.88 mm with relative wall reductions δ 1t = 18.8%, δ 2t = 15.4%, δ 3t = 18.2% and δ 4t = 23.6%, and the coupling conversion pipes from 300 × 30 × 3800 mm of hot-rolled mechanically processed pig billets along the routes of 300 × 30-273 × 27-219 × 24-168 × 21-132.1 × 18 mm with relative wall reductions of δ 1 m = 10.0% , δ 2m = 11.1%, δ 3m = 12.5 and δ 4m = 14.3%, or from hot-rolled mechanically processed pig billets 273x30x4600 mm in size along the routes - 273 × 30-245 × 27-219 × 24-168 × 21-132.1 × 18 mm with relative wall reductions δ 1m = 10.0%, δ 2m = 11.1%, δ 3m = 12.5 and δ 4m = 14.3%, redistribution pipes by measuring 273 × 25 × 4700, 245 × 16 × 2800, 245 × 16 × 5200, 300 × 30 × 3200 and 273 × 30 × 4600 mm, they are machined by turning and boring hot-rolled conversion pipes, respectively 290 × 35, 260 × 30, 310 × 40 and 288 × 45 mm, hot rolled steel tubes of 290 × 35, 260 × 30, 310 × 40 and 288 × 45 mm in size are produced on TPU with pilgrim mills from hollow ingots-blanks of ESRs with a size of, 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 are cast, which are turned and bored to a size of 460 × 100 × 2700 mm and 420 × 95 × 2700 mm heated to plat characteristics and rolled in a pilgrim mill on conical mandrels, respectively 219/224, 199 × 204 and 230/235 mm in size, into hot rolled pipes of 290 × 35 × 9500, 260 × 30 × 8000, 310 × 40 × 7600 and 288 × 45 × 4600 mm, hollow ingots - blanks of sizes 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, heated to 1.0-1.5 hours temperature 450-500 ° C, and then uniformly 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 window after 20-22 minutes at an angle, respectively, ≈ 290-300 ° and 320-330 °, exp hold 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 the pit of the furnace and pass from the furnace with the temperature of the center of the ingot billet 1180-1200 ° C, after discharge from the furnace, the hollow ingot billet on the ingot trolley is blown with compressed air, lubricant is supplied inside as a mixture of graphite with sodium chloride weighing ≈1.0-1.5 kg, and then with a crane transmit to the receiving trolley of the pilgrim mill, hot-rolled steel tubes of 290 × 35 × 9500, 260 × 30 × 8000, 310 × 40 × 7600 and 288 × 45 × 4600 mm sizes on the pilgrim mill they are planted in rolls with calibres of 306, 280 and 315 mm, respectively, with m hollow ingots-blanks fed into the deformation zone, respectively, 22-24, 20-22, 22-24 and 24-26 mm and hoods µ = 3.95 , μ = 4.385, μ = 2.767 and μ = 3.267. 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 the art did not allow them to identify 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 pipe-rolling installation with 8-16 "pilgrim mills and the KhTP 250 mill of ChTPZ OJSC. Five workpieces with a size of 273 × 30 × 3000 mm and one workpiece with a size of 273 × 32 × 3000 mm, obtained by machining forgings of size 290 × 3000 mm (turning of forgings into billets of 273 × 3000 mm in size, followed by drilling and boring of 273 × 30 × 3000 and 273 × 32 × 3000 mm in size) is an existing technology. 10 hot-rolled pig tubes in size of 273 × 25 × 4750 mm and 2 300 × 30 × 3800 mm in size, obtained by machining - turning and boring of hot rolled Pipe size 290 × 35 × 9500 mm × 310 and 40 × 7600 mm, laminated on the TPU 8-16 "with pilger hollow ESR ingots measuring 460 × 100 × 2700 mm - the proposed technology. According to the proposed technology, out of dozens of conversion pipes with a size of 273 × 25 × 4750 mm, 30 tubing pipes with a size of 114.3 × 6.88 × 10700 mm with a total weight of 5842 kg were rolled at a KhPT 250 mill, and from two conversion pipes with a size of 300 × 30 × 3800 mm four pipes with a size of 132.1 × 18 × 6000 mm for the manufacture of couplings. The total expenditure coefficient of the metal for tubing was 2.325, and for pipes with a size of 132.1 × 18 mm for the manufacture of couplings - 2.169. According to the existing technology, 5 billets with a size of 273 × 30 × 3000 mm were rolled at the KhPT 250 mill into commodity tubing pipes with a size of 114.3 × 6.88 mm. Received 107.0 m of pipes with a total weight of 1917 kg. The expenditure coefficient of the metal in the pipes of this batch was 4.582 with an average pipe length of 10700 mm. From a billet with a size of 273 × 32 × 3000 mm, one pipe with a size of 132.1 × 18 × 9600 mm with a total weight of 501 kg was rolled at the HPT 250 mill. The total expenditure coefficient of metal from an ESR ingot of size 480 × 1200 mm to a sleeve pipe of size 132.1 × 18 × 9600 mm was 3.507. The data on the production of tubing 114.3 × 6.88 in size and sleeve 132.1 × 18 mm in size according to the existing and proposed technologies are given in table No. 1.

Table 1. Type of technology The size of cold-smoked pipes (mm) ESR ingots size (mm) amount Tube size
blanks after
mekhobr. (mm)
Size k / g of pipes (mm) Pipe delivery
PC Weight (kg) m kg c / o metal Creatures. 114.3 × 6.88 × 9000 480 × 1200 5 8784 273 × 30 × 3000 - 107.0 1917 4,582 132.1 × 18 n.a. 480 × 1200 one 1757 273 × 32 × 3000 - 9.6 501 3,507 Suggestion 114.3 × 6.88 × 9000 460 × 100 × 2700 5 13580 273 × 25 × 4750 290 × 35 × 9500 321.0 5842 2,325 132.1 × 18 n.a. 460 × 100 × 2700 one 2716 300 × 30 × 3800 210 × 40 × 7600 24.0 1252 2,169

From table 1 it can be seen that in the production of tubing 114.3 × 6.88 in size according to the proposed technology, a decrease in the expenditure coefficient of metal by 2257 kg per ton of pipe was obtained, and in the production of sleeve pipes in the size of 132.1 × 18 mm, a decrease coefficient of metal at 1338 kg per ton of pipe.

Thus, the table shows that in the production of pipes according to the proposed method from ESW hollow ingots with their subsequent rolling at 8-16 "TPU with pilgrim mills into hot rolled pipes, machining by turning and boring them into conversion pipes for subsequent rolling on the mill HPT 250 into commodity tubing 114.3 × 6.88 × 10700 mm and pipes 132.1 × 18 mm in size for the manufacture of couplings, in comparison with the existing technology according to TU 14-1-5483-2004 and TU 14- 1-5484-2009 received a decrease in metal consumption, respectively, by 2257 and 1338 kg per 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 with a size of 114.3 × 6.88 × 9000-10700 mm and conversion pipes with a size of 132.1 × 18 mm for the manufacture of couplings from a corrosion-resistant alloy grade ХН30МДБ-Ш for gas and gas condensate in 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, to improve the quality of pipes by reducing the relative wall compressions along the aisles, and therefore, to reduce the cost of tubing of this assortment.

Claims (4)

1. Method for the production of seamless cold-deformed tubing of 114.3 × 6.88 × 9000-10700 mm in size from a corrosion-resistant alloy of the grade ХН30МДБ-Ш, characterized in that the hollow ingots are melted by electroslag remelting with a size of 470 × 110 × 2700 mm or 430 × 105 × 2700 mm, boring and turning of ingots into hollow ingots-blanks with sizes, respectively, of 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 in Converted hot-rolled pipes measuring 290 × 35 × 9500 m m, or 260 × 30 × 8000 mm, or 310 × 40 × 7600 mm, or 288 × 45 × 4600 mm, boring and turning of hot rolled tubes into pig tubes measuring 273 × 25 × 4700 mm or 245 × 16 × 2800 mm, or 245 × 16 × 5200 mm, and rolling at the HPT mill into commodity tubing pipes of 114.3 × 6.88 × 9000-10700 mm in size, and rolling at the HPT mill conversion pipes of 273 × 25 × 4700 mm in size are carried out along the routes 273 × 25 - 219 × 20 - 180 × 15 - 140 × 10 - 114.3 × 6.88 mm with relative wall compressions δ 1t = 20.0%, δ 2t = 25.0%, δ 3t = 33, 3%, δ 4t = 31.2%, and conversion pipes 245 × 16 × 2800 mm and 245 × 16 × 5200 mm are rolled at the KhTP mill along the routes 245 × 16 - 219 × 13 - 168 × 11 - 140 × 9 - 114.3 × 6.88 with relative wall compressions δ 1t = 18.8%, δ 2t = 15.4%, δ 3t = 18.2%, δ 4t = 23.6%.
2. The method according to claim 1, characterized in that the hollow ingot blanks of 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 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 through 20- 22 minutes at an angle of 290-300 ° and 320-330 °, respectively, is held 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 e window, from the 4th window turn over the pit of the furnace and you ayut from the oven with the temperature ingot billets center 1180-1200 ° C.
3. The method according to claim 2, characterized in that after delivery from the furnace, the hollow ingot blanks on the ingot cart are blown with compressed air, lubricant in the form of a mixture of graphite with sodium chloride weighing 1.0-1.5 kg is fed into the ingot blanks, and then a crane is transferred to the receiving trolley of the pilgrim mill.
4. The method according to claim 1, characterized in that the hot rolled hot-rolled tubes of 290 × 35 × 9500, 260 × 30 × 8000, 310 × 40 × 7600 and 288 × 45 × 4600 mm in size are produced on a pilgrim mill in rolls with calibres respectively of 306 , 280, 315 and 295 mm with feeds of hollow ingots-blanks to the deformation zone, respectively m = 22-24, m = 20-22, m = 22-24 and m = 24-26 mm and hoods µ = 3,95, µ = 4.385, μ = 2.767 and μ = 3.267.
RU2012153537/02A 2012-12-11 2012-12-11 PRODUCTION OF SEAMLESS COLD-FORMED OIL-WELL TUBING SIZED TO 114,3×6, 8×9000-10700 mm FROM CORROSION-RESISTANT ALLOY OF "ХН30МДБ-Ш" GRADE RU2523398C1 (en)

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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
RU2613816C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 132,1×18×10600-10800 mm SIZE FROM CORROSION-RESISTANT ALLOY OF KHN30MDB 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
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
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
RU2615386C1 (en) * 2016-03-22 2017-04-04 Комаров Андрей Ильич Method of producing cold-deformed coupling pipes of 108×18×7,400-7,600 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
RU2615923C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD FOR PRODUCING SEAMLESS COLD-DEFORMED PIPES OF 426x8-25 mm SIZE MADE OF STEEL OF "08Х18Н10Т-Ш" 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

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RU2241557C1 (en) * 2002-06-14 2004-12-10 Марат Васильевич Попов Tube cold rolling method and cold rolling mill for performing the same
RU2294247C2 (en) * 2004-12-27 2007-02-27 ОАО "Челябинский трубопрокатный завод" Cold rolled titanium-alloy large- and mean-diameter high-accuracy tubes production method
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
RU2613816C1 (en) * 2016-03-22 2017-03-21 Комаров Андрей Ильич METHOD OF PRODUCING COLD-DEFORMED COUPLING PIPES OF 132,1×18×10600-10800 mm SIZE FROM CORROSION-RESISTANT ALLOY OF KHN30MDB 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
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
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
RU2615386C1 (en) * 2016-03-22 2017-04-04 Комаров Андрей Ильич Method of producing cold-deformed coupling pipes of 108×18×7,400-7,600 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
RU2615923C1 (en) * 2016-03-22 2017-04-11 Комаров Андрей Ильич METHOD FOR PRODUCING SEAMLESS COLD-DEFORMED PIPES OF 426x8-25 mm SIZE MADE OF STEEL OF "08Х18Н10Т-Ш" 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

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