CN102121354B - The heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory - Google Patents
The heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory Download PDFInfo
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- CN102121354B CN102121354B CN201010622024.2A CN201010622024A CN102121354B CN 102121354 B CN102121354 B CN 102121354B CN 201010622024 A CN201010622024 A CN 201010622024A CN 102121354 B CN102121354 B CN 102121354B
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- inner tube
- user side
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- body inner
- pipe end
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Abstract
The heat-insulating oil pipe connection structure being welded and fixed is held by a kind of pipe end inner tube factory, comprise box cupling, outer tube factory end, outer tube user side, in plumber factory end with in outer tube user side, be all welded with hermetically body inner tube outside, between body inner tube factory end and body inner tube user side, be provided with pipe end inner tube, one end of pipe end inner tube and body inner tube factory end are integrally welded hermetically, the other end is connected by sealing docking structure with body inner tube user side, at pipe end inner tube and body inner tube factory end, outer tube factory end, box cupling, between body inner tube user side and outer tube user side, form the pipe end heat-insulation chamber of a sealing. in pipe end heat-insulation chamber, be provided with collet, between body inner tube factory end, pipe end inner tube and body inner tube user side, form hermetically-sealed construction, it can reduce heat conduction, convection current and the radiation effects of box cupling junction, both reduced thermal loss herein, can improve again sealing property herein, also can prevent the at high temperature perishable problem in box cupling place.
Description
[technical field]
The present invention relates to a kind of insulated tubing joint connecting structure for heavy crude heat extraction, relate in particular to vacuum everyThe syndeton of deep fat pipe joint.
[background technology]
High, the heavy crude oil of viscosity claims viscous crude. The viscosity with temperature of viscous crude changes and significantly changes, test cardBright, for viscous crude, if temperature increases by 8～9 DEG C, its viscosity can reduce half. Therefore, opening viscous crudeAdopt, carry, adopt heating power to reduce its viscosity more; To underground heavy oil tested layer steam injection, be that current oil is capableThe technical measures of industry heavy crude producing, is commonly called as " the steam soak method of heavy crude heat extraction " or " steam orders aboutMethod ".
When to underground injection high temperature (200 DEG C～350 DEG C) steam, for reduce its heat loss, fallLow thermal recovery cost, adopts the tubing string forming with insulated tubing (SY/T5324-94), its joint at present conventionallySyndeton as shown in Figure 1; Described insulated tubing is made up of outer tube 2, body inner tube 3 and box cupling 1, pipeThe length of the Length Ratio outer tube 2 of body inner tube 3 is smaller, and body inner tube 3 two ends are welded on hermetically after enlargingOn the inwall of outer tube 2, and body inner tube 3 and outer tube 2 coaxial, the two ends of outer tube 2 are equipped with pipe taper thread;In the time dispatching from the factory, all twist and be connected to box cupling 1 at the external screw thread of insulated tubing outer tube 2 one end, people will be dispatched from the factory conventionallyTime insulated tubing outer tube 2 one end of being screwed with box cupling 1 be called factory's end, the other end is called user side. In realityIn the use procedure of border, insulated tubing outer tube 2 is connected as shown in Figure 1 with box cupling 1, an insulated tubingOuter tube factory end 21 is screwed in the left end screwed hole of box cupling 1, the outer tube user side of another root insulated tubing22 are screwed in box cupling 1 right-hand member screwed hole, so join end to end, and form the tubing string of insulated tubing. Due toIn each root insulated tubing, between body inner tube 3 and outer tube 2, form body heat-insulation chamber 4, and in itCarry out vacuumizing and processed and arranged multiple heat insulation structural, like this, when pass into steam in insulated tubing time,The thermal losses amount that heat runs off from the body heat-insulation chamber 4 place sections of insulated tubing is just very little, but at heat insulation oilGuan Wei is by 4 coverings place of body heat-insulation chamber, due to plumber factory end 21, outer tube user side 22 and box cupling 1 outsideJunction any heat insulation structural is not set, and the outer tube 2 of box cupling 1 junction and body inner tube 3 the twoInternal diameter differ larger, when steam is during through the junction of box cupling 1, steam can be turbulent shape, therefore,Box cupling 1 junction is the keypoint part of insulated tubing heat loss.
In the prior art, because the connected mode of insulated tubing is for being threaded, passing into high-temperature vapour mistakeCheng Zhong, its threaded connection place is because being subject to high temperature action to there will be leakage problem; Meanwhile, box cupling 1 junctionHigh temperature, can aggravate box cupling at Cl-、CO2Corrosion under hole condition.
Will further reduce the thermal losses of insulated tubing tubing string, emphasis is to reduce insulated tubing to connect at box cuplingThe heat loss at place, should arrange heat insulation structural at box cupling and outer tube junction, resolves sealing herein simultaneouslyProblem; Like this, can effectively reduce the thermal losses of steam injection in insulated tube coupling junction, have againHelp to solve that easily leak at its box cupling place producing because of high temperature and easily by Cl-、CO2The defects such as corrosion.
For above-mentioned purpose, applicant is in 201010513674.3, to disclose a kind of insulated tubing at application numberJoint connecting structure, it can reduce the thermal losses of insulated tube coupling junction, guarantees again hereinSealing property, can also eliminate Yin Gaowen and the box cupling place that produces easily by Cl-、CO2The defect of corrosion.
Its technical essential is: between body inner tube factory end and body inner tube user side, be provided with pipe end inner tube,Pipe end inner tube is made up of left pipe end inner tube and right pipe end inner tube, the left end of left pipe end inner tube and body inner tube factoryHold integral through being welded and fixed, the right-hand member of right pipe end inner tube with body inner tube user side through being welded and fixed into oneBody, forms Hermetical connecting structure between left pipe end inner tube and right pipe end inner tube, in pipe end inner tube and body inner tubeBetween factory's end, outer tube factory end, box cupling, body inner tube user side and outer tube user side, form a sealingPipe end heat-insulation chamber, reduce thermal loss with this, want further to reduce heat waste, can sealing pipe end everyIn hot chamber, set up collet.
Under the effect at insulated tubing screw thread torque wrench moment, left pipe end inner tube and right pipe end in pipe end inner tubeThe seal face of inner tube can produce interference effect, can guarantee the sealing property of left and right pipe end inner tube joint; ThisPlant structure and can reduce conduction, convection current and the radiation effects of heat herein, can reduce the heat of box cupling junctionAmount loss, contributes to again to solve the problems such as leak at nipple place and box cupling is perishable, and it is to manage the most at presentThe heat-insulating oil pipe connection structure of thinking. Applicant, through conscientiously research, designs again a kind of pipe end inner tube user sideThe heat-insulating oil pipe connection structure being welded and fixed, its heat insulation and sealing function and application number are 201010513674.3Described scheme is identical.
[summary of the invention]
The heat-insulating oil pipe connection structure that the object of this invention is to provide the end welding of a kind of pipe end inner tube factory, it bothCan reduce the thermal losses of insulated tube coupling junction, guarantee again sealing property herein, can also eliminate because ofHigh temperature and the box cupling place that produces are by Cl-、CO2The defect of corrosion.
The technical scheme that the present invention takes is:
The heat-insulating oil pipe connection structure being welded and fixed is held by described pipe end inner tube factory, comprise box cupling, with a box cupling left sideThe outer tube factory end that end is threaded, the outer tube user side being threaded with box cupling right-hand member, outside plumber factory endBe welded with sealedly body inner tube factory end, pipe user side is welded with body inner tube user sealedly outsideEnd is provided with pipe end inner tube between body inner tube factory end and body inner tube user side, it is characterized in that: pipe endInner tube factory end and body inner tube factory end are integrally welded hermetically, pipe end inner tube user side and body inner tubeUser side connects by sealing docking structure, hold in pipe end inner tube and body inner tube factory end, outer tube factory,Between box cupling, body inner tube user side and outer tube user side, form the pipe end heat-insulation chamber of a sealing.
Further, the sealing docking structure between pipe end inner tube user side and body inner tube user side is: at pipeBody inner tube user side is provided with docking seam, and the docking that pipe end inner tube user side is sleeved on body inner tube user side stopsIn mouthful, the two end face interference docking, is radially interference fits.
Further, the sealing docking structure between pipe end inner tube user side and body inner tube user side is: at pipeBody inner tube user side is provided with docking seam, and the docking that pipe end inner tube user side is sleeved on body inner tube user side stopsIn mouthful, the length of fit of the two is 5～10 millimeters, and the two end face interference docking, is radially interference fit.
Further, the external diameter of pipe end inner tube factory end is greater than the external diameter of pipe end inner tube user side.
Further, in the pipe end heat-insulation chamber of described sealing, be provided with collet.
Further, described collet is made up of ceramic fibre, on the cylindrical of collet and inner hole wall, all coversBe stamped aluminium foil.
Further, connect at box cupling and the threaded ends of outer tube factory end or the screw thread of box cupling and outer tube user sideConnect end and be provided with torque shoulder, the size of torque shoulder is less than pipe end inner tube factory end and holds it with body inner tube factoryBetween the largest end face magnitude of interference.
Further, be provided with torque shoulder at the threaded ends of box cupling and outer tube user side.
Owing to having set up monoblock type pipe end inner tube in box cupling junction, pipe end inner tube factory end and the interior plumber of bodyFactory's end is connected as a single entity by seal welding mode, and pipe end inner tube user side and body inner tube user side pass through end faceOver-surplus fit structure docking, hold at box cupling and pipe end inner tube, body inner tube factory end, outer tube factory like this,Between body inner tube user side, outer tube user side, form the pipe end heat-insulation chamber of a sealing, improved hereinInsulation; In the time that vapours flows through box cupling junction, vapours can only contact with pipe end inner tube, can be withOuter tube factory end, box cupling and outer tube user side contact, thus can significantly reduce steam in box cupling junction withThe heat loss that conduction pattern produces. If set up collet in pipe end heat-insulation chamber, and at the cylindrical of colletWith on inner hole wall, be all coated with aluminium foil, can reduce better this and sentence convection current and radiation mode and the heat that producesAmount loss. The sealing property of this single-ended welded type pipe end inner tube structure is also guaranteed, pipe end inner tube userEnd has formed first sealing, pipe end inner tube user side with the interference Butt sealing of body inner tube user side end faceForm second sealing with the interference fit of body inner tube user side cylindrical and endoporus, box cupling and outer tube factoryBetween end and outer tube user side, form three seals. Therefore, this syndeton can not only significantly reduceThe thermal loss of box cupling junction, and solved box cupling junction joint screw thread leak and box cupling perishableEtc. problem. The torque shoulder arranging at the threaded ends of box cupling and outer tube, its effect is to guarantee that outer tube screws inWhether accurate upper button in box cupling, occur that by the torque value that spins flex point helps operator and judge whether just upper buttonReally, thus ensure to realize reliable Butt sealing between pipe end inner tube and body inner tube.
[brief description of the drawings]
Fig. 1 is the structural representation that insulated tubing in prior art (SY/T5324-94) connects;
Fig. 2 is the schematic diagram that in prior art, APISPEC5CT sets up sealing ring in gas thread connects;
Fig. 3 is a kind of structural representation of the present invention, and is provided with torque shoulder at user side, heat insulation at pipe endCollet is not set in chamber;
Fig. 4 sets up the structural representation after collet in Fig. 3 in pipe end heat-insulation chamber;
Fig. 5 is the connection diagram between box cupling, pipe end inner tube, outer tube factory end and outer tube user side;
Fig. 6 is the structural representation of collet;
Fig. 7 is the structural representation of torque shoulder;
Fig. 8 is the torque wrench moment curve map that insulated tubing is threaded.
In figure, 1-box cupling; 2-outer tube; 3-body inner tube; 4-body heat-insulation chamber; 5-pipe end inner tube; 6-pipe end is heat insulationChamber; 7-collet; 8-aluminium foil; 9-torque shoulder; 21-outer tube factory end; 22-outer tube user side; 31-pipeBody inner tube factory end; 32-body inner tube user side; 51-pipe end inner tube factory end; 52-pipe end inner tube user side;91-outer tube end face; The spacing end face of 92-coupling inner thread.
[detailed description of the invention]
Below in conjunction with drawings and Examples, the present invention is further detailed explanation.
Embodiment 1: the heat-insulating oil pipe connection structure being welded and fixed is held by described pipe end inner tube factory, as Fig. 3 instituteShow, outer tube factory end 21 that it comprises box cupling 1, be threaded with box cupling 1 left end, with box cupling 1 right-hand member spiral shellThe outer tube user side 22 that line connects, plumber factory end 21 is welded with body inner tube factory end 31 sealedly outside,Pipe user side 22 is welded with body inner tube user side 32 sealedly outside, at body inner tube factory end 31And between body inner tube user side 32, be provided with pipe end inner tube 5, pipe end inner tube factory end 51 and the interior plumber of bodyFactory's end 31 is integrally welded hermetically, is provided with docking seam at body inner tube user side 32, effective in pipe endFamily end 52 is sleeved in the docking seam of body inner tube user side 32, and the length of fit of the two is 5～10Millimeter, the two end face interference docking, is radially interference fits, at pipe end inner tube 5 and body inner tube factory end31, between outer tube factory end 21, box cupling 1, body inner tube user side 32 and outer tube user side 22, form oneThe pipe end heat-insulation chamber 6 of individual sealing, is provided with torque platform at box cupling 1 with the left end that is threaded of outer tube user side 22Shoulder 9.
Embodiment 2: the heat-insulating oil pipe connection structure being welded and fixed is held by described pipe end inner tube factory, as Fig. 4～Outer tube factory end 21 that shown in Fig. 8, it comprises box cupling 1, be threaded with box cupling 1 left end, with box cupling 1The outer tube user side 22 that right-hand member is threaded, plumber factory end 21 is welded with plumber in body sealedly outsideFactory's end 31, pipe user side 22 is welded with body inner tube user side 32, plumber in body sealedly outsideBetween factory's end 31 and body inner tube user side 32, be provided with pipe end inner tube 5, pipe end inner tube factory end 51 and bodyInner tube factory end 31 is integrally welded hermetically, and pipe end inner tube user side 52 is sleeved on interference fitIn the docking seam hole of body inner tube user side 32, the length of fit of the two is 5～10 millimeters, the two shapeBecome end face interference Butt sealing and radial interference fit sealing, at pipe end inner tube 5 and body inner tube factory end31, between outer tube factory end 21, box cupling 1, body inner tube user side 32 and outer tube user side 22, form oneThe pipe end heat-insulation chamber 6 of individual sealing is provided with collet 7, heat insulation in the pipe end heat-insulation chamber 6 of described sealingOn the cylindrical of cover 7 and inner hole wall, be all coated with aluminium foil 8, described collet 7 is made up of ceramic fibre, is connecingHoop 1 is provided with torque shoulder 9 with the left end that is threaded of outer effective end 22.
In above-mentioned example, pipe user side 22 is provided with torque shoulder 9 with box cupling 1 connecting thread end face outside, andBetween torque shoulder 9 middle external tube end faces 91 and the spacing end face 92 of coupling inner thread, distance is less than in pipe end effectiveThe largest end face magnitude of interference between family end 52 and body inner tube user side 32. The effect of torque shoulder 9 is setBe to guarantee that outer tube factory end 21 screws in the interior accurately upper button of box cupling 1, prevent that pipe end inner tube excessive deformation lost efficacy,Whether occur that by the torque value that spins flex point helps operator and whether judge upper button in actual useCorrectly, can ensure to realize reliable end face pair between pipe end inner tube user side 52 and body inner tube user side 32Connect sealing, can prevent from again producing excessive deformation between the two and lose efficacy.
Claims (5)
1. the heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory, comprise box cupling (1),The outer tube factory being threaded with box cupling (1) left end holds (21), is threaded with box cupling (1) right-hand memberOuter tube user side (22), plumber factory end (21) is welded with body inner tube factory end (31) sealedly outside,Pipe user side (22) is welded with body inner tube user side (32) sealedly outside, in body inner tube factoryBetween end (31) and body inner tube user side (32), be provided with pipe end inner tube (5), it is characterized in that: in pipe endPlumber factory end (51) is integrally welded hermetically with body inner tube factory end (31), pipe end inner tube user side(52) is connected by sealing docking structure with body inner tube user side (32), in pipe end inner tube (5) andBody inner tube factory end (31), outer tube factory end (21), box cupling (1), body inner tube user side (32)And between outer tube user side (22), form the pipe end heat-insulation chamber (6) of a sealing, pipe end inner tube user side (52)And the sealing docking structure between body inner tube user side (32) is: establish at body inner tube user side (32)Have docking seam, pipe end inner tube user side (52) is sleeved on the docking seam of body inner tube user side (32)In, the length of fit of the two is 5～10 millimeters, the two end face interference docking, is radially interference fits.
2. the heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory according to claim 1,It is characterized in that: threaded ends or box cupling (1) and outer tube at box cupling (1) with outer tube factory end (21)The threaded ends of user side (22) is provided with torque shoulder (9), and the size of torque shoulder (9) is less than pipeThe largest end face magnitude of interference between end inner tube factory end (51) and body inner tube factory end (31).
3. the heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory according to claim 1,It is characterized in that: be provided with torque shoulder (9) at box cupling (1) and the threaded ends of outer tube user side (22).
4. the heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory according to claim 1,It is characterized in that: the external diameter of pipe end inner tube user side (52) is greater than the external diameter of pipe end inner tube factory end (51).
5. the heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory according to claim 1,It is characterized in that: in the pipe end heat-insulation chamber (6) of described sealing, be provided with collet (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010622024.2A CN102121354B (en) | 2010-12-31 | 2010-12-31 | The heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory |
| PCT/CN2011/001728 WO2012048535A1 (en) | 2010-10-15 | 2011-10-17 | Connection structure for insulated oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010622024.2A CN102121354B (en) | 2010-12-31 | 2010-12-31 | The heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102121354A CN102121354A (en) | 2011-07-13 |
| CN102121354B true CN102121354B (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010622024.2A Expired - Fee Related CN102121354B (en) | 2010-10-15 | 2010-12-31 | The heat-insulating oil pipe connection structure being welded and fixed is held by pipe end inner tube factory |
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| Country | Link |
|---|---|
| CN (1) | CN102121354B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012048535A1 (en) * | 2010-10-15 | 2012-04-19 | 江苏常宝钢管股份有限公司 | Connection structure for insulated oil pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5028081A (en) * | 1987-06-05 | 1991-07-02 | Societe Nationale Elf Aquitaine | Connection for pipes of composite materials |
| CN1149902A (en) * | 1994-05-25 | 1997-05-14 | 若克斯韦尔国际有限公司 | Double walled insulated tubing and method for installing same |
| CN201221652Y (en) * | 2008-07-11 | 2009-04-15 | 江苏常宝钢管股份有限公司 | Oil conduit screw connection structure |
| CN101994486A (en) * | 2010-10-15 | 2011-03-30 | 江苏常宝钢管股份有限公司 | Structure for connecting heat insulation oil pipes |
| CN202125256U (en) * | 2010-12-31 | 2012-01-25 | 江苏常宝钢管股份有限公司 | Heat-insulation oil pipe connection structure welded and fixed at working end of pipe-end inner pipe |
-
2010
- 2010-12-31 CN CN201010622024.2A patent/CN102121354B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5028081A (en) * | 1987-06-05 | 1991-07-02 | Societe Nationale Elf Aquitaine | Connection for pipes of composite materials |
| CN1149902A (en) * | 1994-05-25 | 1997-05-14 | 若克斯韦尔国际有限公司 | Double walled insulated tubing and method for installing same |
| CN201221652Y (en) * | 2008-07-11 | 2009-04-15 | 江苏常宝钢管股份有限公司 | Oil conduit screw connection structure |
| CN101994486A (en) * | 2010-10-15 | 2011-03-30 | 江苏常宝钢管股份有限公司 | Structure for connecting heat insulation oil pipes |
| CN202125256U (en) * | 2010-12-31 | 2012-01-25 | 江苏常宝钢管股份有限公司 | Heat-insulation oil pipe connection structure welded and fixed at working end of pipe-end inner pipe |
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| Publication number | Publication date |
|---|---|
| CN102121354A (en) | 2011-07-13 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180307 Address after: 213000 Jiangsu city of Changzhou province Changzhou New District Suntech Road No. 38 Patentee after: Jiangsu Baotao state petroleum pipe fittings Co. Ltd. Address before: Yanling road 213018 Jiangsu city of Changzhou province No. 558 Patentee before: Jiangsu Changbao Steel Tube Co., Ltd. |
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Effective date of registration: 20200325 Address after: Yanling road 213018 Jiangsu city of Changzhou province No. 558 Patentee after: JIANGSU CHANGBAO STEEL TUBE Co.,Ltd. Address before: 213000 Jiangsu city of Changzhou province Changzhou New District Suntech Road No. 38 Patentee before: JIANGSU CHANGBAO TAOBANG PETROLEUM PIPE Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20191231 |