CN102071879B - 一种预应力隔热油管 - Google Patents

一种预应力隔热油管 Download PDF

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Publication number
CN102071879B
CN102071879B CN 201110002466 CN201110002466A CN102071879B CN 102071879 B CN102071879 B CN 102071879B CN 201110002466 CN201110002466 CN 201110002466 CN 201110002466 A CN201110002466 A CN 201110002466A CN 102071879 B CN102071879 B CN 102071879B
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heat
pipe
insulation
steel cylinder
welded
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CN102071879A (zh
Inventor
潘耀庆
吴永宁
朱进礼
张晓辉
张维
徐振宇
贾振宇
陈季
王毅
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China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
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CNPC Bohai Equipment Manufacturing Co Ltd
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Priority to CN 201110002466 priority Critical patent/CN102071879B/zh
Publication of CN102071879A publication Critical patent/CN102071879A/zh
Priority to CA2762859A priority patent/CA2762859C/en
Priority to MX2012000107A priority patent/MX353833B/es
Priority to US13/345,327 priority patent/US9027607B2/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/003—Insulating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal
    • F16L9/04—Reinforced pipes
    • F16L9/042—Reinforced pipes the reinforcement comprising one or more layers of a helically wound cord, wire or strip
    • F16L9/045—Reinforced pipes the reinforcement comprising one or more layers of a helically wound cord, wire or strip using profiled strips

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Thermal Insulation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

本发明涉及一种新型预应力隔热油管。主要解决现有的隔热油管存在真空度下降及真空隔热系统易破坏的问题。其特征在于：所述内管(3)的一端扩口后焊接在外管(2)内部，内管(3)预伸长后另一端通过调整焊环(5)与外管(2)焊接，内管(3)与外管(2)形成的环腔内有隔热套筒(4)；所述的隔热套筒(4)由至少3层钢筒组成，内层及中间层钢筒外壁缠绕有金属泊，钢筒的端部焊接。该隔热油管具有真空度高、隔热等级高、使用寿命长的特点，并且其隔热套筒可重复使用，节约了材料。

Description

一种预应力隔热油管
技术领域：
本发明石油机械技术领域，特别涉及一种稠油热采用预应力隔热油管。
背景技术：
国内现有预应力隔热油管隔热系统都是通过在隔热管内外管之间添加铝箔、玻璃丝布、吸气剂等材料，并进行抽空，来达到隔热和保温作用，隔热管的视导热系数一般大于0.003w/m℃。蒸汽驱、SAGD采油工艺对隔热管隔热性能、使用寿命提出了更高的要求，现有隔热油管用于蒸汽驱井连续注汽时使用寿命都在2年左右，影响油井正常生产。
发明内容：
为了克服现有的隔热油管存在真空度下降及真空隔热系统易破坏的不足，本发明提供一种新型预应力隔热油管，该隔热油管具有真空度高、隔热等级高、使用寿命长的特点，并且其隔热套筒可重复使用，节约了材料。
本发明的技术方案是：一种预应力隔热油管，包括外管、内管，所述内管的一端扩口后焊接在外管内部，内管的另一端预伸长后通过调整焊环与外管焊接，内管与外管形成的环腔内有隔热套筒；所述的隔热套筒由至少3层钢筒组成，内层及中间层钢筒外壁缠绕有金属泊，钢筒的端部焊接。
所述的隔热套筒轴向由若干段套筒单体相互插接连接而成。
本发明具有如下有益效果：由于采取上述方案，内管与外管之间有隔热套筒，并且隔热套筒由若干个钢筒组成，钢筒之间的环空部分抽真空并添加吸气剂，使其与普通隔热油管相比，真空度更高，除最外层以外的各层钢筒外壁缠绕有金属泊，可增强隔热效果，隔热性能更好，可满足特殊工况的要求，延长隔热油管的使用寿命，并且隔热套筒可重复使用，节约成本。
附图说明：
图1是本发明的结构示意图；
图2是隔热套筒的结构示意图。
图中1-接箍，2-外管，3-内管，4-隔热套筒，5-调整焊环。
具体实施方式：
下面结合附图对本发明作进一步说明：
由图1所示，一种预应力隔热油管，包括外管2、内管3，所述内管3的一端墩粗扩口后焊接在外管2内部，内管3预伸长后另一端通过调整焊环5与外管2焊接，内管3与外管2形成的环腔内有隔热套筒4；所述的隔热套筒4由至少3层钢筒组成，各层钢筒的端部焊接，可以直接焊接或通过连接件焊接，钢筒之间形成至少2层环空，环空部分抽真空并添加吸气剂，使真空度小于0.1Pa。隔热套筒4的钢筒的数量也可以大于3层，则其形成的环空数量更多，内层及各中间层钢筒外壁上缠绕有金属泊，增强隔热效果，使隔热性能更好，为增加强度，钢筒上可加工一些环形的凸起；隔热套筒4的长度可由一节或多节套筒单体组成，各套筒单体之间插接连接，即各层钢管相互插接，可根据需要进行调整。
该新型预应力隔热油管加工时内管3的一端墩粗并扩口，其外径与外管2内径形成配合，进行环焊连接在一起，再将隔热套筒4套装在内管3上，用调整焊环5调整轴向方向长度后进行焊接。该新型预应力隔热油管与普通隔热油管相比，真空度更高，隔热性能更好，可满足特殊工况的要求；并且省去缠绕等工艺，降低按劳付酬强度、减少污染；同时延长使用寿命，由普通隔热油管的2年提高至7-9年；内部的隔热套筒4可重复使用，节约成本。

Claims (1)

1.一种预应力隔热油管，包括外管(2)、内管(3)，其特征在于：所述内管(3)的一端扩口后焊接在外管(2)内部，内管(3)预伸长后另一端通过调整焊环(5)与外管(2)焊接；内管(3)与外管(2)形成的环腔内有套装在内管（3）上的隔热套筒(4)，所述的隔热套筒(4)由至少3层钢筒组成，钢筒上加工有一些环形的凸起，各层钢筒的端部直接焊接或通过连接件焊接；内层及中间层钢筒外壁缠绕有金属泊；各层钢筒之间形成至少2层环空，环空部分抽真空并添加吸气剂，以使环空内的真空度小于0.1Pa；所述的隔热套筒(4)轴向由若干段套筒单体相互插接连接而成。
CN 201110002466 2011-01-07 2011-01-07 一种预应力隔热油管 Active CN102071879B (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN 201110002466 CN102071879B (zh) 2011-01-07 2011-01-07 一种预应力隔热油管
CA2762859A CA2762859C (en) 2011-01-07 2011-12-30 Pre-stressed insulated tubing
MX2012000107A MX353833B (es) 2011-01-07 2012-01-02 Tubería aislada pre-tensada.
US13/345,327 US9027607B2 (en) 2011-01-07 2012-01-06 Pre-sressed insulated tubing

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Application Number Priority Date Filing Date Title
CN 201110002466 CN102071879B (zh) 2011-01-07 2011-01-07 一种预应力隔热油管

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CN102071879B true CN102071879B (zh) 2013-07-10

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CN102953688A (zh) * 2012-11-23 2013-03-06 中国石油集团渤海石油装备制造有限公司 一种涂层真空隔热油管
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Publication number Publication date
MX2012000107A (es) 2012-07-16
US9027607B2 (en) 2015-05-12
US20120175007A1 (en) 2012-07-12
CA2762859C (en) 2014-05-13
CN102071879A (zh) 2011-05-25
CA2762859A1 (en) 2012-07-07
MX353833B (es) 2018-01-31

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