发明名称 |
METHOD FOR MANUFACTURING OF HEAT-INSULATED STRING SECTION |
摘要 |
FIELD: oil and gas industry.SUBSTANCE: method includes coaxial placement of inner tube with insulation, gas absorbers and centring skids in outer tube. Outer tube is equipped with fluid-tight valve that provides vacuum 10-10mm Hg in tubular annulus. Outer and inner tubes are connected through steel linings by means of their welding to pipes by vacuum-tight seams. To outer tube linings are welded at the point of male screw placements at ends within area under the section from the first turn till base plane of thread. Thermal treatment of vacuum-tight seams provides improvement of their plasticity. Heating of inner and outer tube is made stage by stage up to final temperature of 350-450°C. At each stage of heating in tubular annulus vacuum of 10-10mm Hg is created. Male screws are made at the ends of outer tube after mechanical treatment of vacuum-tight seams.EFFECT: reducing heat losses at heat carrier passage through tube string, increasing operational reliability of string and efficiency of string section assembly.2 cl, 2 dwg |
申请公布号 |
RU2500874(C2) |
申请公布日期 |
2013.12.10 |
申请号 |
RU20120103572 |
申请日期 |
2012.02.02 |
申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO "SINARSKIJ TRUBNYJ ZAVOD" (OAO "SINTZ");OTKRYTOE AKTSIONERNOE OBSHCHESTVO "ROSSIJSKIJ NAUCHNO-ISSLEDOVATEL'SKIJ INSTITUT TRUBNOJ PROMYSHLENNOSTI" ("ROSNITI") |
发明人 |
CHETVERIKOV SERGEJ GENNAD'EVICH;TRUTNEV NIKOLAJ VLADIMIROVICH;GREKHOV ALEKSANDR IGOREVICH;TIKHONTSEVA NADEZHDA TAKHIROVNA;LEFLER MIKHAIL NOEKHOVICH;PYSHMINTSEV IGOR' JUR'EVICH;KUZNETSOV VLADIMIR IVANOVICH;KOPYLOV PETR LEONIDOVICH;KRIVOSHEEV ANDREJ ALEKSANDROVICH;CHERNUKHIN VLADIMIR IVANOVICH;REKIN SERGEJ ALEKSANDROVICH;SHCHERBAKOV BORIS JUR'EVICH;BYKOV ARKADIJ PETROVICH;EMEL'JANOV JURIJ FEDOROVICH;CHERNYKH IL'JA VIKTOROVICH |
分类号 |
E21B17/00 |
主分类号 |
E21B17/00 |
代理机构 |
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代理人 |
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主权项 |
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