CN102121355A - Heat-insulating oil tube connecting structure of which user end of pipe-end inner pipe is welded fixedly - Google Patents
Heat-insulating oil tube connecting structure of which user end of pipe-end inner pipe is welded fixedly Download PDFInfo
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- CN102121355A CN102121355A CN2010106220276A CN201010622027A CN102121355A CN 102121355 A CN102121355 A CN 102121355A CN 2010106220276 A CN2010106220276 A CN 2010106220276A CN 201010622027 A CN201010622027 A CN 201010622027A CN 102121355 A CN102121355 A CN 102121355A
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Abstract
The invention relates to a heat-insulating oil tube connecting structure of which the user end of a pipe-end inner pipe is welded fixedly. The structure comprises a coupling, the factory end of an outer pipe and the user end of an outer pipe, wherein a pipe body inner pipe is hermetically welded inside the factory end of the outer pipe and the user end of the outer pipe; the pipe-end inner pipe is arranged between the factory end of the pipe body inner pipe and the user end of the pipe body inner pipe; one end of the pipe-end inner pipe is hermetically welded with the user end of the pipe body inner pipe, and the other of the pipe-end inner pipe is connected with the factory end of the pipe body inner pipe by a hermetical butt-joint structure; and a closed pipe-end heat-insulating cavity is formed between the pipe-end inner pipe and the factory end of the pipe body inner pipe, the factory end of the outer pipe, the coupling, the user end of the pipe body inner pipe and the user end of the outer pipe. A heat-insulating sleeve is arranged in the pipe-end heat-insulating cavity, and a sealing structure is formed among the factory end of the pipe body inner pipe, the pipe-end inner pipe and the user end of the pipe body inner pipe, so the heat conduction, convection and radiation effects at the joint of the coupling can be reduced, the heat loss at the joint of the coupling can be reduced, the sealing performance at the joint of the coupling can be improved, and the problem that the joint of the coupling is easy to corrode at high temperature can be solved.
Description
[technical field]
The present invention relates to a kind of insulated tubing joint connecting structure that is used for heavy crude heat extraction, relate in particular to the syndeton of vacuum heat-insulation oil pipe joint.
[background technology]
Viscosity height, heavy crude oil claim viscous crude.The viscosity with temperature of viscous crude changes and significantly changes, and test shows that for viscous crude, if temperature increases by 8～9 ℃, its viscosity can reduce half.Therefore, to exploitation, the conveying of viscous crude, adopt heating power to reduce its viscosity more; To underground heavy oil tested layer steam in jection, be the major technique measure of present petroleum industry heavy crude producing, be commonly called as " the steam soak method of heavy crude heat extraction " or " steam orders about method ".
To underground injection high temperature (200 ℃～350 ℃) steam the time, loss, reduction thermal recovery cost in order to reduce its heat adopt the tubing string that constitutes with insulated tubing (SY/T5324-94) at present usually, and its joint connecting structure as shown in Figure 1; Described insulated tubing is made up of pipe 3 and box cupling 1 in outer tube 2, the body, the length of pipe 3 is more smaller than the length of outer tube 2 in the body, pipe 3 two ends are through being welded on hermetically on the inwall of outer tube 2 after the enlarging in the body, and pipe 3 and outer tube 2 are coaxial in the body, and the two ends of outer tube 2 are equipped with the pipe taper thread; When dispatching from the factory, all to twist at the external screw thread of insulated tubing outer tube 2 one ends and to be connected to box cupling 1, the end that insulated tubing outer tube 2 was screwed with box cupling 1 when people will be dispatched from the factory usually is called factory's end, and the other end then is called user side.In actual use, insulated tubing outer tube 2 is connected as shown in Figure 1 with box cupling 1, the outer tube factory end 21 of an insulated tubing is screwed in the left end screwed hole of box cupling 1, the outer tube user side 22 of another root insulated tubing is screwed in the box cupling 1 right-hand member screwed hole, so join end to end, form the tubing string of insulated tubing.Because in each root insulated tubing, formed body heat-insulation chamber 4 between pipe 3 and the outer tube 2 in the body, and to having carried out vacuumizing processing in it, and multiple heat insulation structural is set, like this, when in insulated tubing, feeding steam, heat is just very little from the thermal losses amount of the body heat-insulation chamber 4 place sections losses of insulated tubing, but at insulated tubing not by 4 coverings place of body heat-insulation chamber, because plumber factory end 21 outside, outer tube user side 22 is not provided with any heat insulation structural with the junction of box cupling 1, and the two internal diameter of pipe 3 differs bigger in the outer tube 2 of box cupling 1 junction and the body, when steam passes through the junction of box cupling 1, steam can be turbulent shape, therefore, in box cupling 1 junction be the keypoint part that the insulated tubing heat scatters and disappears.
In the prior art, because the connected mode of insulated tubing is for being threaded, in feeding high-temperature vapour process, its connection of thread leakage problem can occur because of being subjected to high temperature action; Simultaneously, the high temperature of box cupling 1 junction can aggravate box cupling at Cl
-, CO
2Corrosion under the hole condition.
Will further reduce the thermal losses of insulated tubing tubing string, emphasis is to reduce the heat of insulated tubing in the box cupling junction to scatter and disappear, and should heat insulation structural be set at box cupling and outer tube junction, resolves sealing problem herein simultaneously; Like this, can effectively reduce the thermal losses of steam in jection, help again to solve that easily leak at its box cupling place that produces because of high temperature and easily by Cl in the insulated tube coupling junction
-, CO
2Defectives such as corrosion.
For above-mentioned purpose, the applicant is the joint connecting structure that discloses a kind of insulated tubing in 201010513674.3 at application number, it can reduce the thermal losses of insulated tube coupling junction, guarantees sealing performance herein again, can also eliminate Yin Gaowen and the box cupling place that produces easily by Cl
-, CO
2The defective of corrosion.
Its technical essential is: be provided with in the pipe end between the pipe user side in plumber factory end and the body in body and manage, pipe is formed by managing in pipe and the right pipe end in the left pipe end in the pipe end, the interior plumber factory of the left end of pipe and body end is fixed into one through welding in the pipe end of a left side, manage user side in the right-hand member of pipe and the body in the right pipe end and be fixed into one through welding, form the structure that is tightly connected between the pipe in pipe and the right pipe end in the pipe end of a left side, plumber factory end in the tube and tube body in pipe end, outer tube factory end, box cupling, form the pipe end heat-insulation chamber of a sealing in the body between pipe user side and the outer tube user side, reduce thermal loss with this, want further to reduce heat waste, can in the pipe end heat-insulation chamber of sealing, set up collet.
Owing under the effect of insulated tubing screw thread torque wrench moment, the interior pipe of left pipe end can produce the interference effect with the seal face of the interior pipe of right pipe end in the interior pipe of pipe end, can guarantee the interior sealing performance of managing joint of left and right sides pipe end; This structure can reduce conduction, convection current and the radiation effects of heat herein, can reduce the thermal loss of box cupling junction, helps to solve problems such as leak at the nipple place and box cupling is perishable again, and it is present ideal insulated tubing syndeton.The applicant designs the fixing insulated tubing syndeton of pipe user side welding in a kind of pipe end again through conscientiously research, and it is heat insulation to be that 201010513674.3 described schemes are identical with sealing function and application number.
[summary of the invention]
The purpose of this invention is to provide the insulated tubing syndeton of pipe user side welding in a kind of pipe end, it can reduce the thermal losses of insulated tube coupling junction, guarantees sealing performance herein again, can also eliminate Yin Gaowen and the box cupling place that produces by Cl
-, CO
2The defective of corrosion.
The technical scheme that the present invention takes is:
The fixing insulated tubing syndeton of pipe user side welding in the described pipe end, comprise box cupling, the outer tube factory end that is threaded with the box cupling left end, the outer tube user side that is threaded with the box cupling right-hand member, plumber factory end is welded with plumber factory end in the body sealedly outside, manage user side outside and be welded with pipe user side in the body sealedly, in body, be provided with in the pipe end between the pipe user side in plumber factory end and the body and manage, it is characterized in that: the interior pipe of pipe user side and body user side is integrally welded hermetically in the pipe end, plumber factory end is held by the sealing docking structure with the interior plumber factory of body and is connected in the pipe end, plumber factory end in the tube and tube body in pipe end, outer tube factory end, box cupling, form the pipe end heat-insulation chamber of a sealing in the body between pipe user side and the outer tube user side.
Further, in the pipe end in plumber factory end and the body sealing docking structure between the plumber factory end be: plumber factory holds to be provided with and docks seam in body, plumber factory end is sleeved in the butt joint seam of plumber factory end in the body in the pipe end, the length of fit of the two is 5～10 millimeters, the two end face interference butt joint radially is an interference fits.
Further, sealing docking structure between plumber factory holds in plumber factory end and the body in the pipe end is: plumber factory is provided with and docks seam in body, plumber factory end is sleeved in the butt joint seam of plumber factory end in the body in the pipe end, and the two end face interference butt joint radially is an interference fit.
Further, the external diameter that the external diameter of pipe user side is held greater than plumber factory in the pipe end in the pipe end.
Further, in the pipe end heat-insulation chamber of described sealing, be provided with collet.
Further, described collet is made by ceramic fibre, all is coated with aluminium foil on the cylindrical of collet and inner hole wall.
Further, be provided with the torque shoulder at the threaded ends of box cupling and outer tube factory end or the threaded ends of box cupling and outer tube user side, the size of torque shoulder is less than the largest end face magnitude of interference between plumber factory holds in plumber factory end and the body in the pipe end.
Further, the threaded ends at box cupling and outer tube user side is provided with the torque shoulder.
Owing in the monolithic pipe end has been set up in the box cupling junction, manage, managing user side in the pipe end in pipe user side and the body is connected as a single entity by the seal welding mode, plumber factory end is held with the interior plumber factory of body and is docked by the end face over-surplus fit structure in the pipe end, in box cupling and pipe end, manage the pipe end heat-insulation chamber that forms a sealing between user side, the outer tube user side in plumber factory end, outer tube factory end, the body in pipe, the body like this, improved insulation herein; When vapours flows through the box cupling junction, vapours can only with pipe end in manage and contact, can not contact with the outer tube user side with outer tube factory end, box cupling, scatter and disappear thereby can reduce the heat that steam produces with conduction pattern in the box cupling junction significantly.If in the pipe end heat-insulation chamber, set up collet, and on the cylindrical of collet and inner hole wall, all be coated with aluminium foil, then can reduce this better and sentence convection current and radiation mode and the thermal losses that produces.The sealing performance of this single-ended welded type pipe end inner tube structure also is guaranteed, plumber factory end holds the interference Butt sealing of end face to form the sealing of first road with the interior plumber factory of body in the pipe end, plumber factory end has formed the sealing of second road with the interference fit of body interior plumber factory end cylindrical and endoporus in the pipe end, forms three seals between box cupling and outer tube factory end and the outer tube user side.Therefore, this syndeton can not only reduce the thermal loss of box cupling junction significantly, and problem such as the joint screw thread that has solved the box cupling junction leaks and box cupling is perishable.The torque shoulder that is provided with at the threaded ends of box cupling and outer tube, its effect is to guarantee that outer tube screws in the accurate button of going up in the box cupling, flex point whether occurs by the torque value that spins and help the operator and judge whether go up button correct, thereby guarantee to realize between the pipe in the tube and tube body in the pipe end reliable Butt sealing.
[description of drawings]
Fig. 1 is the structural representation that insulated tubing in the prior art (SY/T5324-94) connects;
Fig. 2 sets up the schematic diagram of sealing ring in gas thread connects for API SPEC 5CT in the prior art;
Fig. 3 is a kind of structural representation of the present invention, and is provided with the torque shoulder at user side, in the pipe end heat-insulation chamber collet is not set;
Fig. 4 is for setting up the structural representation behind the collet in the pipe end heat-insulation chamber in Fig. 3;
Fig. 5 is the connection diagram between pipe in box cupling, the pipe end, outer tube factory end and the outer tube user side;
Fig. 6 is the structural representation of collet;
Fig. 7 is the structural representation of torque shoulder;
The torque wrench moment curve map that Fig. 8 is threaded for insulated tubing.
Among the figure, the 1-box cupling; The 2-outer tube; Pipe in the 3-body; 4-body heat-insulation chamber; Pipe in the 5-pipe end; 6-pipe end heat-insulation chamber; The 7-collet; The 8-aluminium foil; The 9-torque shoulder; 21-outer tube factory end; 22-outer tube user side; Plumber factory end in the 31-body; Pipe user side in the 32-body; Plumber factory end in the 51-pipe end; Pipe user side in the 52-pipe end; 91-outer tube end face; The spacing end face of 92-box cupling internal thread.
[specific embodiment]
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Embodiment 1: the fixing insulated tubing syndeton of pipe user side welding in the described pipe end, as shown in Figure 3, it comprises box cupling 1, the outer tube factory end 21 that is threaded with box cupling 1 left end, the outer tube user side 22 that is threaded with box cupling 1 right-hand member, plumber factory end 21 is welded with plumber factory end 31 in the body sealedly outside, manage user side 22 outside and be welded with pipe user side 32 in the body sealedly, in body, be provided with between the pipe user side 32 in plumber factory end 31 and the body and manage 5 in the pipe end, pipe user side 52 is integrally welded hermetically with the interior pipe of body user side 32 in the pipe end, plumber factory end 31 is provided with the butt joint seam in body, plumber factory end 51 is sleeved in the butt joint seam of plumber factory end 31 in the body in the pipe end, the length of fit of the two is 5～10 millimeters, the two end face interference butt joint, it radially is interference fits, plumber factory end 31 in pipe 5 and the body in pipe end, outer tube factory end 21, box cupling 1, form the pipe end heat-insulation chamber 6 of a sealing in the body between pipe user side 32 and the outer tube user side 22, be provided with torque shoulder 9 with the left end that is threaded of outer tube user side 22 at box cupling 1.
Embodiment 2: the fixing insulated tubing syndeton of pipe user side welding in the described pipe end, as Fig. 4～shown in Figure 8, it comprises box cupling 1, the outer tube factory end 21 that is threaded with box cupling 1 left end, the outer tube user side 22 that is threaded with box cupling 1 right-hand member, plumber factory end 21 is welded with plumber factory end 31 in the body sealedly outside, manage user side 22 outside and be welded with pipe user side 32 in the body sealedly, in body, be provided with between the pipe user side 32 in plumber factory end 31 and the body and manage 5 in the pipe end, pipe user side 52 is integrally welded hermetically with the interior pipe of body user side 32 in the pipe end, plumber factory end 51 is sleeved in the butt joint seam hole of plumber factory end 31 in the body in the pipe end with interference fit, the length of fit of the two is 5～10 millimeters, the two forms end face interference Butt sealing and radial interference fit sealing, plumber factory end 31 in pipe 5 and the body in pipe end, outer tube factory end 21, box cupling 1, form the pipe end heat-insulation chamber 6 of a sealing in the body between pipe user side 32 and the outer tube user side 22, in the pipe end heat-insulation chamber 6 of described sealing, be provided with collet 7, on the cylindrical of collet 7 and inner hole wall, all be coated with aluminium foil 8, described collet 7 is made by ceramic fibre, is provided with torque shoulder 9 at box cupling 1 with the left end that is threaded of outer effective end 22.
In above-mentioned example, manage user side 22 outside and be provided with torque shoulder 9, and distance is held the largest end face magnitude of interference between 31 less than plumber factory in plumber factory end 51 in the pipe end and the body between torque shoulder 9 middle external tube end faces 91 and the spacing end face 92 of box cupling internal thread with box cupling 1 connecting thread end face.The effect that torque shoulder 9 is set is to guarantee that outer tube factory end 21 screws in the accurate button of going up in the box cupling 1, prevent that the pipe excessive deformation lost efficacy in the pipe end, flex point whether occurring by the torque value that spins in actual use helps the operator and judges whether go up button correct, can guarantee to realize reliable end face Butt sealing between the plumber factory end 31 in the plumber factory end 51 and body in the pipe end, can prevent generation excessive deformation between the two again and lost efficacy.
Claims (7)
1. manage the fixing insulated tubing syndeton of user side welding in a pipe end, comprise box cupling (1), the outer tube factory end (21) that is threaded with box cupling (1) left end, the outer tube user side (22) that is threaded with box cupling (1) right-hand member, plumber factory end (21) is welded with plumber factory end (31) in the body sealedly outside, manage user side (22) outside and be welded with pipe user side (32) in the body sealedly, in body, be provided with pipe (5) in the pipe end in plumber factory end (31) and the body between the pipe user side (32), it is characterized in that: pipe user side (52) is integrally welded hermetically with body interior pipe user side (32) in the pipe end, plumber factory holds (51) to be connected by the sealing docking structure with the interior plumber factory end of body (31) in the pipe end, and (31) are held by plumber factory in pipe (5) and the body in pipe end, outer tube factory end (21), box cupling (1), form the pipe end heat-insulation chamber (6) of a sealing in the body between pipe user side (32) and the outer tube user side (22).
2. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of claim 1, it is characterized in that: plumber factory end (51) holds the sealing docking structure between (31) to be with the interior plumber factory of body in the pipe end: plumber factory end (31) is provided with and docks seam in body, plumber factory end (51) is sleeved in the butt joint seam of plumber factory end (31) in the body in the pipe end, the two end face interference butt joint radially is an interference fits.
3. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of claim 1, it is characterized in that: plumber factory end (51) holds the sealing docking structure between (31) to be with the interior plumber factory of body in the pipe end: plumber factory end (31) is provided with and docks seam in body, plumber factory end (51) is sleeved in the butt joint seam of plumber factory end (31) in the body in the pipe end, the length of fit of the two is 5～10 millimeters, the two end face interference butt joint radially is an interference fit.
4. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of claim 1, it is characterized in that: be provided with torque shoulder (9) at box cupling (1) and the threaded ends of outer tube factory end (21) or the threaded ends of box cupling (1) and outer tube user side (22), the size of torque shoulder (9) is less than the largest end face magnitude of interference between the plumber factory end (31) in plumber factory end (51) and the body in the pipe end.
5. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of claim 4, it is characterized in that: the threaded ends at box cupling (1) and outer tube user side (22) is provided with torque shoulder (9).
6. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of claim 1, it is characterized in that: the external diameter of pipe user side (52) is greater than the external diameter of plumber factory end (51) in the pipe end in the pipe end.
7. according to the fixing insulated tubing syndeton of pipe user side welding in the described pipe end of 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 |
|---|---|---|---|
| CN201010622027.6A CN102121355B (en) | 2010-12-31 | 2010-12-31 | The heat-insulating oil pipe connection structure that in pipe end, pipe user side is welded and fixed |
| 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 |
|---|---|---|---|
| CN201010622027.6A CN102121355B (en) | 2010-12-31 | 2010-12-31 | The heat-insulating oil pipe connection structure that in pipe end, pipe user side is welded and fixed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102121355A true CN102121355A (en) | 2011-07-13 |
| CN102121355B CN102121355B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010622027.6A Active CN102121355B (en) | 2010-10-15 | 2010-12-31 | The heat-insulating oil pipe connection structure that in pipe end, pipe user side is welded and fixed |
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| Country | Link |
|---|---|
| CN (1) | CN102121355B (en) |
Cited By (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 |
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| JPS56108491A (en) * | 1979-12-20 | 1981-08-28 | Gen Electric | Insulating casing aggregate |
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| CN201412078Y (en) * | 2009-05-27 | 2010-02-24 | 曹春富 | Novel heat-insulated pipe heat-insulated pipe nipple |
| 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 |
| CN201943599U (en) * | 2010-12-31 | 2011-08-24 | 江苏常宝钢管股份有限公司 | Heat-insulation oil tube connecting structure for fixedly welding tube end inner tube user terminal |
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2010
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1904139B1 (en) * | 1969-01-28 | 1970-12-17 | Mini Petrolului | Thermally insulating pipe string |
| JPS56108491A (en) * | 1979-12-20 | 1981-08-28 | Gen Electric | Insulating casing aggregate |
| CN2769491Y (en) * | 2004-11-11 | 2006-04-05 | 王善永 | Viscous oil thermal recovery well jacket pipe connecting structure |
| CN2816328Y (en) * | 2005-07-22 | 2006-09-13 | 新疆石油管理局钻井工艺研究院 | Thick-oil hot-production sleeve-pipe head |
| CN201412078Y (en) * | 2009-05-27 | 2010-02-24 | 曹春富 | Novel heat-insulated pipe heat-insulated pipe nipple |
| 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 |
| CN201943599U (en) * | 2010-12-31 | 2011-08-24 | 江苏常宝钢管股份有限公司 | Heat-insulation oil tube connecting structure for fixedly welding tube end inner tube user terminal |
Cited By (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 |
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|---|---|
| CN102121355B (en) | 2015-09-30 |
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Effective date of registration: 20210319 Address after: No.38, Shangde Road, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee after: JIANGSU CHANGBAO TAOBANG PETROLEUM PIPE Co.,Ltd. Address before: Yanling road 213018 Jiangsu city of Changzhou province No. 558 Patentee before: JIANGSU CHANGBAO STEEL TUBE Co.,Ltd. |