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1. 发明专利

JPH0264196A LUBRICANT FOR PRODUCING SEAMLESS STEEL PIPE 失效
公开(公告)号：JPH0264196A
公开(公告)日：1990-03-05
申请号：JP21362388
申请日：1988-08-30
申请人： NIPPON KOKAN KK , YUSHIRO CHEM IND
发明人： TANAKA MEGUMI , SAKURA HIROMOCHI , ODA TATSUHARU , HIRAKAWA TOMOYUKI , SOTANI YASUHIRO , KAJIYAMA FUYUHIKO , KANDA NOBORU , HOSONO HIROO , WAKABAYASHI TOSHITAKA , HASEGAWA JUN
IPC分类号： C10M173/00 , C10N10/02 , C10N20/00 , C10N20/06 , C10N30/06 , C10N30/08 , C10N40/24 , C10N50/02
摘要： PURPOSE:To obtain the title lubricant capable of providing water resistance, impact resistance and good lubricating properties by adding a salt of polybasic polymeric acid to a composition consisting essential of graphite fine powder and water insoluble fine-particle synthetic resin and then dispersing the blend into water. CONSTITUTION:The aimed lubricant obtained by adding (C) one or more kind of salts of polybasic polymeric acid selected from fumic acid, nitrofumic acid and ligninsulfonic acid to a composition consisting essential of (A) graphite fine powder, preferably having

2. 发明专利

JPH0264195A SEAMLESS STEEL PIPE-PRODUCING LUBRICANT CONTAINING GILSONITE FINE POWDER 失效
公开(公告)号：JPH0264195A
公开(公告)日：1990-03-05
申请号：JP21362288
申请日：1988-08-30
申请人： NIPPON KOKAN KK , YUSHIRO CHEM IND
发明人： TANAKA MEGUMI , SAKURA HIROMOCHI , ODA TATSUHARU , HIRAKAWA TOMOYUKI , SOTANI YASUHIRO , KAJIYAMA FUYUHIKO , KANDA NOBORU , HOSONO HIROO , WAKABAYASHI TOSHITAKA , HASEGAWA JUN
IPC分类号： C10M173/00 , C10N10/02 , C10N20/00 , C10N20/06 , C10N30/06 , C10N30/08 , C10N40/24 , C10N50/02
摘要： PURPOSE:To obtain the title lubricant capable of providing water resistance, impact resistance and good lubricating properties by adding a salt of polybasic high-molecular weight acid to a composition consisting of a graphite fine powder, gilsonite fine powder and fine-particle synthetic resin insoluble in water and dispersing the blend into water. CONSTITUTION:The aimed lubricant obtained by adding one or more kind of salts of polybasic high-molecular weight acid selected from (D) humic acid, nitrohumic acid and ligninsulfonic acid to a composition consisting essentially of fine-particle synthetic resin insoluble in water consisting of (A) graphite fine powder, preferably having

3. 发明专利

JPH1190578A MANUFACTURE OF STEEL TUBE WITH THICK-WALLED TUBE END 失效
公开(公告)号：JPH1190578A
公开(公告)日：1999-04-06
申请号：JP25159397
申请日：1997-09-17
申请人： NIPPON KOKAN KK
发明人： KINOSHITA HARUHIKO , ONO TATSUO , SAKURA HIROMOCHI
IPC分类号： B21J5/08 , B21K21/12
摘要： PROBLEM TO BE SOLVED: To manufacture a short steel tube with thick-walled end with excellent yield by upsetting each end of a long tube to from a thick-walled part, cutting and inverting the tube at appropriate parts other than the thick-walled part, achieving the butt welding of the thick-walled parts to each other, and upsetting each tube end to be cut at the welded parts. SOLUTION: A long steel tube 1 before upsetting is upset, tube-end thick- walled parts 2a, 2b are formed on each tube end, the tube is cut at the position A of 1/3 of the whole length, and inverted, the thick-walled parts 2a, 2b are welded to each other to form a welded long steel tube 6. The stet tube 6 is upset thick-walled parts 7a, 7b are formed on each tube end, the tube is cut at the position B of 1/3 of the whole length, and inverted, the thick-walled parts 7a, 7b are welded to from a welded long steel tube 11. In addition, each tube end is upset to from a long steel tube 12 having thick-walled parts at two parts, i.e., the tube end and an intermediate part, weld seams 5, 10 of the intermediate thick-walled part are cut to form three short tube end thick-walled tubes. The cutting parts A, B for forming the short tubes are appropriately selected.

4. 发明专利

JPH0536479B2 失效
公开(公告)号：JPH0536479B2
公开(公告)日：1993-05-31
申请号：JP21362388
申请日：1988-08-30
申请人： NIPPON KOKAN KK , YUSHIRO KAGAKU KOGYO KK
发明人： TANAKA MEGUMI , SAKURA HIROMOCHI , ODA TATSUHARU , HIRAKAWA TOMOYUKI , SOTANI YASUHIRO , KAJAMA FUYUHIKO , KANDA NOBORU , HOSONO HIROO , WAKABAYASHI TOSHITAKA , HASEGAWA JUN
IPC分类号： C10M173/00 , C10N10/02 , C10N20/00 , C10N20/06 , C10N30/06 , C10N30/08 , C10N40/24 , C10N50/02

5. 发明专利

JPH0390205A BAR CONSTRAINING TYPE ROLLING EQUIPMENT 失效
公开(公告)号：JPH0390205A
公开(公告)日：1991-04-16
申请号：JP22467989
申请日：1989-09-01
申请人： NIPPON KOKAN KK
发明人： SAKURA HIROMOCHI , AKITA SHINJI , HATANAKA MASAYUKI , OKAMOTO YOSHIHIDE
IPC分类号： B21B25/04
摘要： PURPOSE:To surely apply a lubricating oil and to improve quality by providing a coating device of a lubricant at the inlet side of a mandrel mill and applying the lubricant on the mandrel bar which retreats by completing rolling. CONSTITUTION:When a mandrel bar 2 starts to retreat on completion of the rolling of a hollow blank pipe 12a by a mandrel mill 8, a pump 22 is actuated, a lubricant is forcibly fed to a nozzle ring 17 and injected from a nozzle and applied on the mandrel bar 2. On its coating in a specific range the pump 22 is stopped and the coating is finished. At this time, because of the mandrel bar 2 being just after being drawn from the hollow blank pipe 12a, the surface temp. is maintained at about >=100 deg.C and so, the drying after coating of the lubricant is fast and a tough film is formed.

6. 发明专利

JPH0536478B2 失效
公开(公告)号：JPH0536478B2
公开(公告)日：1993-05-31
申请号：JP21362288
申请日：1988-08-30
申请人： NIPPON KOKAN KK , YUSHIRO KAGAKU KOGYO KK
发明人： TANAKA MEGUMI , SAKURA HIROMOCHI , ODA TATSUHARU , HIRAKAWA TOMOYUKI , SOTANI YASUHIRO , KAJAMA FUYUHIKO , KANDA NOBORU , HOSONO HIROO , WAKABAYASHI TOSHITAKA , HASEGAWA JUN
IPC分类号： C10M173/00 , C10N10/02 , C10N20/00 , C10N20/06 , C10N30/06 , C10N30/08 , C10N40/24 , C10N50/02

7. 发明专利

JPH03157594A CLAMPING CONTROL METHOD FOR SPECIAL JOINT WITH SHOULDER SEAL 失效
公开(公告)号：JPH03157594A
公开(公告)日：1991-07-05
申请号：JP29579289
申请日：1989-11-14
申请人： NIPPON KOKAN KK
发明人： SAKURA HIROMOCHI , HAYASHI AKIRA , YAMADA IKUO , NAKAGAWA NOBUO
IPC分类号： F16L15/04
摘要： PURPOSE:To aim at the optimization of clamping torque by clamping a special joint system, consisting of a joint with an internal thread on an inner circumferential surface and a pipe with an external thread on the outer circumferential surface, as long as the setting time as detecting a shoulder touch, in such a control method as clamping the internal thread to the external thread after being screwed in. CONSTITUTION:A special joint 1 is thread-joined by an internal thread 2 installed on a double-end inner circumferential surface and an external thread 4 threaded on each outer circumferential surface of pipes 3a, 3b, through which it is metal-sealed. This is a control method that clamps this special joint 1 after each end of these pipes 3a, 3b performs a shoulder touch with a shoulder part 6, setting the clamping time of clamping torque of thread part + shoulder seal. Next, thread clamping takes place as detecting the shoulder touch and, after detection of the shoulder touch, these threads are clamped as long as the setting time, and when this time elapses, the clamping is over. In consequence, since a proper contact pressure is given to the shoulder seal part, stable clamping can be done.

8. 发明专利

JPH03114605A MANUFACTURE OF SEAMLESS STEEL PIPE AND BAR DRAWING DEVICE 失效
公开(公告)号：JPH03114605A
公开(公告)日：1991-05-15
申请号：JP25068289
申请日：1989-09-28
申请人： NIPPON KOKAN KK
发明人： HATANAKA MASAYUKI , AKITA SHINJI , TAKAHASHI HIROYUKI , OKAMOTO YOSHIHIDE , SAKURA HIROMOCHI , YOKOYAMA TAKASHI , YAMAYASHIRO MASAYUKI
IPC分类号： B21B17/02 , B21B17/04 , B21B25/02
摘要： PURPOSE:To prevent the generation of a rolling member clogging accident by providing a bar drawing means on the manufacturing device of a seamless steel pipe equipped with a restrained type mandrel mill. CONSTITUTION:A bar drawing device 6 is arranged by approaching to the outlet port of the final stand of a mandrel mill 1 with the device rolling the rolling member 4 prior to rolling and a member 4a by mandrel mill 1, sizer 2 arranged at the outlet port side of the mandrel mill 1, a mandrel bar 3 and barrestrainer 5. Thus, the retreat of the rolling member is checked with its rear end part being abutted on the bar drawing device 6, even in the case of the mandrel bar 3 and rolling member 4a becoming in a shrink fitting state, the mandrel bar 3 only becomes to retreat, can be drawn easily and the clogging prevention of the rolling member and the improvement of the equipment operation rate can be attained.

9. 发明专利

JPH10267187A OIL WELL PIPE 失效
公开(公告)号：JPH10267187A
公开(公告)日：1998-10-09
申请号：JP7490297
申请日：1997-03-27
申请人： NIPPON KOKAN KK
发明人： SAKURA HIROMOCHI
IPC分类号： B32B1/08 , B32B27/32 , F16L1/024 , F16L9/14 , F16L57/00
摘要： PROBLEM TO BE SOLVED: To provide an oil well pipe having self-perforation which can be self-repaired even when petroleum extraction port is blocked during use. SOLUTION: A sliding layer made of material whose stiffness coefficient ranges between 10 and 10 N/m in the state of one year use under use environmental temperature of an oil well pipe, and a protection layer for protecting the sliding layer are sequentially arranged on an outer surface of a steel pipe. In such an oil well pipe, the protection layer is made of polypropyrene or ethyrene propyrene complymer resin. The thickness of the protection layer is 5 mm or less.

10. 发明专利

JPH05115904A METHOD FOR ROLLING SEAMLESS STEEL TUBE 失效
公开(公告)号：JPH05115904A
公开(公告)日：1993-05-14
申请号：JP28004891
申请日：1991-10-25
申请人： NIPPON KOKAN KK
发明人： KOBAYASHI NOBUO , SAKURAI KATSUMI , SAKURA HIROMOCHI , SUZUKI TOSHIO , YASUOKA HIDENORI
IPC分类号： B21B17/02 , B21B37/18 , B21B37/78 , B21B45/02
摘要： PURPOSE:To prevent bend in the rolling tip part of a seamless tube by starting rolling after the tip part of a tube stock which is bored with a boring machine is cooled. CONSTITUTION:When the rolling tip part of the seamless steel tube 2 is transported under a cooling water header 3, the seamless steel tube 2 is stopped and turning rollers 4 are lifted. After the seamless steel tube 2 is supported in the state that the tube is separated from carrier rollers 1 with the turning rollers 4, the seamless steel tube 2 is revolved around the axial line by revolving the turning rollers 4. Simultaneously cooling water is injected from the cooling water header 3 and the seamless steel tube 2 is cooled. In this way the deformation resistance in the cooled rolling tip part is increased and the part isn't downward bent even in the state that the tip part after rolling isn't supported with the rollers 1.

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