发明名称 |
HEAT-INSULATED PIPE STRING |
摘要 |
FIELD: oil production industry. SUBSTANCE: heat-insulated pipe string is used for injecting heat-carrying agent into oil bed. Pipe string has internal pipe which carries multiple-layer screen type insulation, external pipe, and sleeve. Internal pipe is made integral and is provided with beaded profiled ends. External pipe prior to mounting is compressed along axis by 9-12 mm. External pipe has taper-thrust thread on its ends and is provided with valve which is equally distant from pipe ends. After hermetically sealing of seat, valve is made vacuum-tight. Internal and external pipes are made of same material and are welded with vacuum-tight seams at their ends. Arranged on multiple-layer screen type insulation are centering rings, and gas absorber is located between layers of multiple-layer screen type insulation. Created in annular space between pipes is vacuum equal to 10<SP>-4</SP>-10 mm Hg. Sleeve is screwed on external pipes. Sealing bush is provided with groove and it presses profiled ends of internal pipe to external pipe. Aforesaid embodiment of heat-insulated pipe string allows for reduction of loss of heat when injecting heat-carrying agent into oil bed together with enhancing performance reliability of heat-insulated pipe string. EFFECT: higher efficiency. 1 dwg
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申请公布号 |
RU2129202(C1) |
申请公布日期 |
1999.04.20 |
申请号 |
RU19970114110 |
申请日期 |
1997.08.12 |
申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO "UDMURTNEFT'" |
发明人 |
KUDINOV V.I.;BOGOMOL'NYJ E.I.;ZAV'JALOV M.P.;BAGIROV RZAKULI RASHID OGLY;PROSVIRIN A.A.;MARCHENKO L.G. |
分类号 |
E21B17/00;E21B36/00;(IPC1-7):E21B17/00 |
主分类号 |
E21B17/00 |
代理机构 |
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代理人 |
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