CN201943598U - Split assembled heat-insulating oil tube connecting structure - Google Patents
Split assembled heat-insulating oil tube connecting structure Download PDFInfo
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- CN201943598U CN201943598U CN2010206981395U CN201020698139U CN201943598U CN 201943598 U CN201943598 U CN 201943598U CN 2010206981395 U CN2010206981395 U CN 2010206981395U CN 201020698139 U CN201020698139 U CN 201020698139U CN 201943598 U CN201943598 U CN 201943598U
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Abstract
The utility model relates to a split assembled heat-insulating oil tube connecting structure which comprises a coupling, an outer tube factory terminal and an outer tube user terminal; tube body inner tubes are welded in the outer tube factory terminal and the outer tube user terminal in a sealing way; a tube end inner tube is arranged between a tube body inner tube factory terminal and a tube body inner tube user terminal; each tube end inner tube comprises a factory terminal sleeve and a user terminal sleeve; the factory terminal sleeves, the user terminal sleeves, the tube body inner tube factory terminal and the tube body inner tube user terminal are connected through a sealing and butting structure; a closed tube end heat-insulation cavity is formed among the tube end inner tube as well as the tube body inner tube factory terminal, the outer tube factory terminal, the coupling, the tube body inner tube user terminal and the outer tube user terminal; a heat-insulation sleeve is arranged in the tube end heat-insulation cavity; and the split assembled heat-insulating oil tube connecting structure can not only reduce the heat transfer, the convection and the radiation as well as the heat loss of the joint of the coupling, but also can improve the sealing performance of the joint and prevent the problem that the coupling is easy to be corroded at high temperature.
Description
[technical field]
The utility model relates to a kind of insulated tubing joint connecting structure that is used for heavy crude heat extraction, relates 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 a kind of assembled insulated tubing syndeton again through conscientiously research, and it is heat insulation to be that 201010513674.3 described schemes are identical with sealing function and application number.
[utility model content]
The purpose of this utility model provides a kind of assembled insulated tubing syndeton, and 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 utility model is taked is:
Described assembled insulated tubing syndeton, 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: Guan Weifen body structure in the pipe end, it is made up of factory's end sleeve pipe and user side sleeve pipe, factory's end sleeve pipe, the user side sleeve pipe, plumber factory end is connected by the sealing docking structure with the interior pipe of body user side in the body, 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, described sealing docking structure is: the pipe user side all is provided with the butt joint seam in plumber factory end and the body in body, the axial length L of butt joint seam, the length L of factory's end sleeve pipe
1Length L with the user side sleeve pipe
2All greater than the axial length L of docking seam, the left end of factory's end sleeve pipe is sleeved in the butt joint seam of plumber factory end in the body, the right-hand member of user side sleeve pipe is sleeved in the butt joint seam of pipe user side in the body, passes through end face interference Butt sealing between factory's end sleeve pipe and the user side sleeve pipe.
Further, described sealing docking structure is: the pipe user side all is provided with the butt joint seam in plumber factory end and the body in body, the axial length L of butt joint seam, the length L of user side sleeve pipe
2For the butt joint seam axial length L 3/10～7/10, and the user side casing pipe sleeve is contained in the butt joint seam of pipe user side in the body, the two ends of factory's end sleeve pipe are set in the butt joint seam of pipe user side in body interior plumber factory end and the body, pass through end face interference Butt sealing between factory's end sleeve pipe and the user side sleeve pipe.
Further, the user side sleeve pipe is sleeved in the body in the interference fits mode in the butt joint seam of pipe user side, and the two ends of factory's end sleeve pipe are set in the body with interference fit and manage in the butt joint seam of user side in the plumber factory end and body.
Further, the user side sleeve pipe is sleeved in the butt joint seam of pipe user side in the body with interference fit, the left end of factory's end sleeve pipe is sleeved on interference fit in the butt joint seam of plumber factory end in the body, and the right-hand member of factory's end sleeve pipe is sleeved in the butt joint seam of pipe user side in the body in the interference fits mode.
Further, described sealing docking structure is: the pipe user side all is provided with the butt joint seam in plumber factory end and the body in body, the axial length L of butt joint seam, the length L of factory's end sleeve pipe
1For the butt joint seam axial length L 1/4～3/4, and factory's end casing pipe sleeve is contained in the butt joint seam of plumber factory end in the body, the two ends of user side sleeve pipe are set in the butt joint seam of pipe user side in body interior plumber factory end and the body, pass through end face interference Butt sealing between factory's end sleeve pipe and the user side sleeve pipe.
Further, factory end sleeve pipe is sleeved in the interference fits mode in the butt joint seam of plumber factory end in the body, and the two ends of user side sleeve pipe are set in the body with interference fit and manage in the butt joint seam of user side in the plumber factory end and body.
Further, factory's end sleeve pipe is sleeved in the butt joint seam of plumber factory end in the body with interference fit, the left end of user side sleeve pipe is sleeved on interference fit in the butt joint seam of plumber factory end in the body, and the right-hand member of user side sleeve pipe is sleeved in the butt joint seam of pipe user side in the body in the interference fits mode.
Further, be provided with collet in the pipe end heat-insulation chamber of described sealing, 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 distance between outer tube end face and the spacing end face of box cupling internal thread is held the maximum interference amount sum of sleeve pipe and user side sleeve pipe less than factory.
Owing in split type pipe end has been set up in the box cupling junction, manage, pipe is made up of factory's end sleeve pipe and user side sleeve pipe in the pipe end, plumber factory end is connected by the sealing docking structure with the interior pipe of body user side in factory's end sleeve pipe, user side sleeve pipe, the body, hold the pipe end heat-insulation chamber of managing a sealing of formation between user side, the outer tube user side in plumber factory end in sleeve pipe, user side sleeve pipe, the body, outer tube factory end, the body at box cupling and factory 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 package assembly is also guaranteed, manage user side in plumber factory end and the body in factory's end sleeve pipe, user side sleeve pipe, the body and formed the sealing of first road by end face interference Butt sealing, pipe two ends cylindrical has formed the sealing of second road with the interference fit of docking between the seam endoporus of the interior pipe of body in the pipe end, forms three seals between box cupling and the outer tube.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 occurring by the torque value that spins helps the operator and judges whether go up button correct, can guarantee sealing butt joint reliably between the pipe in the tube and tube body in the pipe end, can prevent pipe excessive deformation in the pipe end again and cause seal failure.
[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 utility model, and the length of the length of factory's end sleeve pipe and user side sleeve pipe is provided with the torque shoulder all greater than the axial length of butt joint seam at user side;
Fig. 4 is second kind of structural representation of the present utility model, and the length of factory end sleeve pipe is greater than the axial length of butt joint seam, and the length of user side sleeve pipe is provided with the torque shoulder less than the axial length of butt joint seam at user side;
Fig. 5 is the third structural representation of the present utility model, and the length of factory end sleeve pipe is less than the axial length of butt joint seam, and the length of user side sleeve pipe is provided with the torque shoulder greater than the axial length of butt joint seam at user side;
Fig. 6 is the connection diagram between pipe in box cupling, the pipe end, outer tube factory end and the outer tube user side;
Fig. 7 is the structural representation of collet;
Fig. 8 is the structural representation of torque shoulder;
The torque wrench moment curve map that Fig. 9 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; 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; 51-factory end sleeve pipe; 52-user side sleeve pipe; 91-outer tube end face; The spacing end face of 92-box cupling internal thread.
[specific embodiment]
Below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment 1: described assembled insulated tubing syndeton, 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 in the pipe end between the pipe user side 32 in plumber factory end 31 and the body and manage, Guan Weifen body structure in the pipe end, it is by factory's end sleeve pipe 51, user side sleeve pipe 52 is formed, pipe user side 32 all is provided with the butt joint seam in plumber factory end 31 and the body in body, axial length L=10 millimeter of butt joint seam, the length L of factory's end sleeve pipe 51
1Length L with user side sleeve pipe 52
2All greater than the axial length L of docking seam, the left end of factory's end sleeve pipe 51 is sleeved in the butt joint seam of plumber factory end 31 in the body in the interference fits mode, the right-hand member of user side sleeve pipe 52 is sleeved in the interference fits mode in the butt joint seam of pipe user side 32 in the body, passes through end face interference Butt sealing between factory's end sleeve pipe 51 and the user side sleeve pipe 52; In pipe end, manage the pipe end heat-insulation chamber that forms a sealing between user side 32 and the outer tube user side 22 in plumber factory end 31, outer tube factory end 21, box cupling 1, the body in the tube and tube body, in the pipe end heat-insulation chamber of described sealing, be provided with collet 7, described collet 7 is made by ceramic fibre, all is coated with aluminium foil 8 on the cylindrical of collet 7 and inner hole wall; Threaded ends at box cupling 1 and outer tube user side 22 is provided with torque shoulder 9, and the distance between the spacing end face 92 of outer tube end face 91 and box cupling internal thread is less than the maximum interference amount sum of factory's end sleeve pipe 51 and user side sleeve pipe 52.
Embodiment 2: in embodiment 1, change factory's end sleeve pipe 51 and user side sleeve pipe 52 and the fit system that docks seam, the left end that is factory's end sleeve pipe 51 is sleeved in the butt joint seam of plumber factory end 31 in the body with interference fit, the right-hand member of user side sleeve pipe 52 is sleeved on interference fit in the butt joint seam of pipe user side 32 in the body, and its sealing effectiveness can be better.
Embodiment 3: described assembled insulated tubing syndeton, 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 in the pipe end between the pipe user side 32 in plumber factory end 31 and the body and manage, Guan Weifen body structure in the pipe end, it is made up of factory's end sleeve pipe 51 and user side sleeve pipe 52, pipe user side 32 all is provided with the butt joint seam in plumber factory end 31 and the body in body, axial length L=10 millimeter of butt joint seam, the length L of user side sleeve pipe 52
2Be 3/10～7/10 of the axial length L of butt joint seam, L in this example
2=5 millimeters, user side sleeve pipe 52 is sleeved in the butt joint seam of pipe user side 32 in the body in the interference fits mode; The two ends of factory end sleeve pipe 51 all are sleeved in the body in the plumber factory end 31 and body in the butt joint seam of pipe user side 32 with interference fit, pass through end face interference Butt sealing between factory's end sleeve pipe 51 and the user side sleeve pipe 52.In pipe end, manage the pipe end heat-insulation chamber that forms a sealing between user side 32 and the outer tube user side 22 in plumber factory end 31, outer tube factory end 21, box cupling 1, the body in the tube and tube body, in the pipe end heat-insulation chamber of described sealing, be provided with collet 7, described collet 7 is made by ceramic fibre, all is coated with aluminium foil 8 on the cylindrical of collet 7 and inner hole wall; Threaded ends at box cupling 1 and outer tube user side 22 is provided with torque shoulder 9, and the distance between the spacing end face 92 of outer tube end face 91 and box cupling internal thread is less than the maximum interference amount sum of factory's end sleeve pipe 51 and user side sleeve pipe 52.In the present embodiment, the length of factory's end sleeve pipe 51 and the length of user side sleeve pipe 52 can be exchanged, and its effect is identical.
Claims (10)
1. assembled insulated tubing syndeton, 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 in the pipe end in plumber factory end (31) and the body between the pipe user side (32), it is characterized in that: Guan Weifen body structure in the pipe end, it holds sleeve pipe (51) and user side sleeve pipe (52) to form by factory, factory's end sleeve pipe (51), user side sleeve pipe (52), plumber factory end (31) is connected by the sealing docking structure with body interior pipe user side (32) in the body, plumber factory end (31) in the tube and tube body in pipe end, outer tube factory end (21), box cupling (1), form the pipe end heat-insulation chamber of a sealing in the body between pipe user side (32) and the outer tube user side (22).
2. according to the described assembled insulated tubing syndeton of claim 1, it is characterized in that: described sealing docking structure is: pipe user side (32) all is provided with the butt joint seam in plumber factory end (31) and the body in body, the axial length L of butt joint seam, the length L of factory's end sleeve pipe (51)
1Length L with user side sleeve pipe (52)
2All greater than the axial length L of docking seam, the left end of factory's end sleeve pipe (51) is sleeved in the butt joint seam of plumber factory end (31) in the body, the right-hand member of user side sleeve pipe (52) is sleeved in the butt joint seam of pipe user side (32) in the body, passes through end face interference Butt sealing between factory's end sleeve pipe (51) and the user side sleeve pipe (52).
3. according to the described assembled insulated tubing syndeton of claim 1, it is characterized in that: described sealing docking structure is: pipe user side (32) all is provided with the butt joint seam in plumber factory end (31) and the body in body, the axial length L of butt joint seam, the length L of user side sleeve pipe (52)
2For the butt joint seam axial length L 3/10～7/10, and user side sleeve pipe (52) is sleeved in the butt joint seam of pipe user side (32) in the body, the two ends of factory's end sleeve pipe (51) are set in the butt joint seam of pipe user side (32) in interior plumber factory end of body (31) and the body, pass through end face interference Butt sealing between factory's end sleeve pipe (51) and the user side sleeve pipe (52).
4. according to the described assembled insulated tubing syndeton of claim 3, it is characterized in that: user side sleeve pipe (52) is sleeved in the interference fits mode in the butt joint seam of managing user side (32) in the body, and the two ends of factory end sleeve pipe (51) are set in the body with interference fit and manage in the butt joint seam of user side (32) in the plumber factory end (31) and body.
5. according to the described assembled insulated tubing syndeton of claim 3, it is characterized in that: user side sleeve pipe (52) is sleeved in the butt joint seam of managing user side (32) in the body with interference fit, the left end of factory's end sleeve pipe (51) is sleeved on interference fit in the butt joint seam of plumber factory end (31) in the body, and the right-hand member of factory's end sleeve pipe (51) is sleeved in the butt joint seam of managing user side (32) in the body in the interference fits mode.
6. according to the described assembled insulated tubing syndeton of claim 1, it is characterized in that: described sealing docking structure is: pipe user side (32) all is provided with the butt joint seam in plumber factory end (31) and the body in body, the axial length L of butt joint seam, the length L of factory's end sleeve pipe (51)
1For the butt joint seam axial length L 3/10～7/10, and factory's end sleeve pipe (51) is sleeved in the butt joint seam of plumber factory end (31) in the body, the two ends of user side sleeve pipe (52) are set in the butt joint seam of pipe user side (32) in interior plumber factory end of body (31) and the body, pass through end face interference Butt sealing between factory's end sleeve pipe (51) and the user side sleeve pipe (52).
7. according to the described assembled insulated tubing syndeton of claim 6, it is characterized in that: factory end sleeve pipe (51) is sleeved in the interference fits mode in the butt joint seam of plumber factory end (31) in the body, and the two ends of user side sleeve pipe (52) are set in the body with interference fit and manage in the butt joint seam of user side (32) in the plumber factory end (31) and body.
8. according to the described assembled insulated tubing syndeton of claim 6, it is characterized in that: factory's end sleeve pipe (51) is fitted in the butt joint seam of plumber factory end (31) in the body with interference fit, the left end of user side sleeve pipe (52) is fitted in the butt joint seam of plumber factory end (31) in the body with interference fit, and the right-hand member of user side sleeve pipe (52) is sleeved in the butt joint seam of managing user side (32) in the body in the interference fits mode.
9. according to the described assembled insulated tubing syndeton of claim 1, it is characterized in that: in the pipe end heat-insulation chamber of described sealing, be provided with collet (7), described collet (7) is made by ceramic fibre, all is coated with aluminium foil (8) on the cylindrical of collet (7) and inner hole wall.
10. according to the described assembled insulated tubing syndeton 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 distance between outer tube end face (91) and the spacing end face of box cupling internal thread (92) is held the maximum interference amount sum of sleeve pipe (51) and user side sleeve pipe (52) less than factory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206981395U CN201943598U (en) | 2010-12-31 | 2010-12-31 | Split assembled heat-insulating oil tube connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206981395U CN201943598U (en) | 2010-12-31 | 2010-12-31 | Split assembled heat-insulating oil tube connecting structure |
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| Publication Number | Publication Date |
|---|---|
| CN201943598U true CN201943598U (en) | 2011-08-24 |
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|---|---|---|---|
| CN2010206981395U Expired - Lifetime CN201943598U (en) | 2010-12-31 | 2010-12-31 | Split assembled heat-insulating oil tube connecting structure |
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| CN (1) | CN201943598U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121353A (en) * | 2010-12-31 | 2011-07-13 | 江苏常宝钢管股份有限公司 | Split assembly heat-insulating oil pipe connecting structure |
| 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 |
-
2010
- 2010-12-31 CN CN2010206981395U patent/CN201943598U/en not_active Expired - Lifetime
Cited By (2)
| 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 |
| CN102121353A (en) * | 2010-12-31 | 2011-07-13 | 江苏常宝钢管股份有限公司 | Split assembly heat-insulating oil pipe connecting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Changbao Precision Steel Tube Co., Ltd. Assignor: Jiangsu Changbao Steel Tube Co., Ltd. Contract record no.: 2012320000600 Denomination of utility model: Split assembly heat-insulating oil pipe connecting structure Granted publication date: 20110824 License type: Exclusive License Record date: 20120516 |
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