CN103277055B - Tubing centralizer - Google Patents
Tubing centralizer Download PDFInfo
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- CN103277055B CN103277055B CN201310219337.7A CN201310219337A CN103277055B CN 103277055 B CN103277055 B CN 103277055B CN 201310219337 A CN201310219337 A CN 201310219337A CN 103277055 B CN103277055 B CN 103277055B
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- heat
- tubing
- righting
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- outer tube
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Abstract
The invention discloses a tubing centralizer which comprises a switch connection mechanism, a heat-insulation mechanism, a centering mechanism and a fixing mechanism. The heat-insulation mechanism comprises an inner center tube, an outer tube and a composite heat-insulation barrel, the outer tube is sleeved on the outside of the inner center tube, and the composite heat-insulation barrel is arranged in annular space formed by the inner center tube and the outer tube; the centering mechanism comprises a centering body, a centering block and an elastic centering plate spring, and the elastic centering plate spring is arranged in space formed by grooves of the centering body and grooves of the centering block; the maximum outer diameter of the centering block is larger than that of an insulated tubing on an injection string; a coupling of the switch connection mechanism is connected with the inner center tube of the heat-insulation mechanism in a threaded manner; and a fixing ring of the fixing mechanism is mounted at two ends of the outside of the outer tube and is connected to the outer tube in a threaded manner. The tubing centralizer has the advantages that the tubing centralizer is good in heat-insulation performance and has an excellent elastic centering function, a centralizing effect can be realized for the string, the heat-insulation performance of the integral injection string is improved, and requirements of production for injected high-temperature multi-element hot fluid or steam for offshore thick oil are effectively met.
Description
Technical field
The present invention relates to the Technology of Heavy Oil Recovery, espespecially a kind of tubing centrilizer for Offshore Heavy Oil Field thermal recovery high-inclination horizontal well.
Background technology
At present, Offshore Heavy Oil Field exploitation all adopts horizontal well, and due to offshore platform limited space, kickoff point (KOP) is substantially about 400 meters beginnings, and hole angle is larger, and casing programme is complicated.Like this, in horizontal well thermal recovery note high temperature polyol hot fluid (as nitrogen+carbon dioxide+water vapour) or high-temperature steam are produced, whole injection string needs to take righting measure, guarantee insulated tube coupling does not contact with Wall of Cased Hole, thus reduces the heat transfer directly contacted due to insulated tube coupling and sleeve pipe and the heat waste caused.
Existing tubing centrilizer is installed on after on tubing string, although play the effect of righting tubing string, but, because the wiper block steel body of tubing centrilizer directly contacts with internal surface of sleeve pipe, cause tubing centrilizer and casing-contact place exists high-temperature area, there is the risk of high temperature failure in the sleeve pipe of this high-temperature area, and the conductive heat loss that the conductive heat loss produced contacts with Wall of Cased Hole much larger than insulated tube coupling and produces.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of tubing centrilizer, there is centralizing function, meanwhile, produce pass to heat waste due to direct the contact with internal surface of sleeve pipe of wiper block steel body of tubing centrilizer can be avoided.Thus meet the demand of Offshore Heavy Oil Field horizontal well thermal recovery hot-fluid injection or steam injection production.
In order to reach the object of the invention, the invention provides realization and comprising: a kind of tubing centrilizer, comprise conversion bindiny mechanism, heat preservation mechanism, righting mechanism and fixed mechanism; Wherein,
The complex heat-preservation cylinder that heat preservation mechanism comprises inner central tube, is enclosed within the outer tube of inner central tube outside, is arranged on the annular space be made up of inner central tube and outer tube;
Righting mechanism comprises righting main body, wiper block, and is arranged on the elasticity righting leaf spring in the space that is made up of the groove of righting main body and the groove of wiper block;
The maximum outside diameter of wiper block is greater than the maximum outside diameter of insulated tubing on injection string;
The box cupling of conversion bindiny mechanism is connected with the inner central tube of heat preservation mechanism by screw thread;
The retainer ring of fixed mechanism is arranged on outside pipe two ends and is threaded connection in outer tube.
Described conversion bindiny mechanism comprises box cupling, is enclosed within sleeve outside box cupling.
In the annular space be made up of the periphery of described box cupling and the inner headed face of described sleeve, insulating ring is set;
Described insulating ring is made up of the composite material with heat-insulation and heat-preservation function that the coefficient of heat conduction is low.
Be vacuum state in described annular space.
Described box cupling is connected by welding procedure with between sleeve.
Described heat preservation mechanism also comprises the insulation ring flat-plate of the outside being arranged on described outer tube;
Described insulation ring flat-plate is made up of the composite material with heat-insulation and heat-preservation function that the coefficient of heat conduction is low.
The annular space that described inner central tube and described outer tube are formed is vacuum state.
Be connected by welding procedure between described inner central tube with described outer tube.
The groove of described righting main body is arranged on the periphery of righting main body, and be rectangular groove, quantity is one or more;
The groove of described wiper block is arranged on the inner headed face of wiper block, is rectangular groove, equal with described righting main body quantity;
Described wiper block is arranged on the outside of described righting main body, corresponding with the groove of described righting main body.
The outside two ends of described righting main body are provided with screw thread, and screw thread place is provided with multiple circular hole.
The periphery two sections of described wiper block is provided with the chamfering of 30 degree.
Described fixed mechanism comprises retainer ring, anti-rotation is marked closely, fixed jacket, set bolt; Wherein,
Retainer ring is provided with and marks closely hole, the inner headed face of retainer ring is provided with the cannelure equal with the number of recesses of described righting main body;
Anti-rotation mark closely be arranged on retainer ring mark closely in hole;
Fixed jacket is placed on the two ends of described righting body exterior, and is connected with described righting main body by screw thread; The screw thread place of fixed jacket is provided with the screw hole equal with the circular hole quantity of described righting main body; Bolt is arranged in the screw hole of fixed jacket and the circular hole of described righting main body.
The periphery of described fixed jacket is provided with the chamfering of 30 degree.
Described heat preservation mechanism also comprises the heat insulation at upper and lower two ends, the outside being arranged on described outer tube;
Described heat insulation is arranged in the cannelure of described retainer ring.
Described heat insulation and material that intensity high low by coefficient of thermal conductivity is made.
Compared with prior art, tubing centrilizer of the present invention comprises conversion bindiny mechanism, heat preservation mechanism, righting mechanism, and fixed mechanism; Wherein, the heat preservation mechanism complex heat-preservation cylinder that comprises inner central tube, be enclosed within the outer tube of inner central tube outside, be arranged on the annular space be made up of inner central tube and outer tube; Righting mechanism comprises righting main body, wiper block, and elasticity righting leaf spring, and elasticity righting leaf spring is arranged in the space that is made up of the groove of righting main body and the groove of wiper block; The maximum outside diameter of wiper block is greater than the maximum outside diameter of insulated tubing on injection string; The box cupling of conversion bindiny mechanism is connected with the inner central tube of heat preservation mechanism by screw thread; The retainer ring of fixed mechanism is arranged on outside pipe two ends and is threaded connection on outer tube.On the one hand, maximum outside diameter due to the wiper block of tubing centrilizer of the present invention is greater than the maximum outside diameter of insulated tubing on injection string (and other instrument), enter, meet when tripping out the risk of card under reducing instrument, make tubing centrilizer of the present invention not only serve the effect of righting tubing string, and ensure that the property placed in the middle of whole tubing string does not contact with internal surface of sleeve pipe with the box cupling of insulated tubing; On the other hand, the elasticity righting leaf spring arranged in the heat preservation mechanism that tubing centrilizer of the present invention is arranged and righting mechanism, tubing centrilizer of the present invention is made to be provided with good heat-proof quality and elasticity righting function, improve the heat-proof quality of whole injection string, be applicable to the casing programme of marine horizontal well thermal recovery complexity well, meet the demand of Offshore Heavy Oil Field note high temperature polyol hot fluid or production of steam.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from manual, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in manual, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms a part for manual, is used from and explains technical scheme of the present invention, do not form the restriction to technical solution of the present invention with the embodiment one of the application.
Fig. 1 is the vertical section structure schematic diagram of tubing centrilizer of the present invention;
Fig. 2 is the partial enlargement vertical section structure schematic diagram of conversion bindiny mechanism in tubing centrilizer of the present invention, heat preservation mechanism and righting mechanism.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can be combined mutually.
Can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing.Further, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 1 is the vertical section structure schematic diagram of tubing centrilizer of the present invention, and as shown in Figure 1, tubing centrilizer of the present invention comprises conversion bindiny mechanism, heat preservation mechanism, righting mechanism, and fixed mechanism; Conversion bindiny mechanism is arranged on centralizer two ends; Heat preservation mechanism is arranged on the outside of conversion bindiny mechanism, is connected with screw thread by welding with conversion bindiny mechanism; Righting mechanism is arranged on the outside of heat preservation mechanism; Heat preservation mechanism and righting mechanism connect together by fixed mechanism.Wherein,
Conversion bindiny mechanism forms primarily of box cupling 1-1, the sleeve 1-2 be enclosed within outside box cupling 1-1, and can be connected by welding procedure between box cupling 1-1 with sleeve 1-2, the upper and lower two ends of inner circle of box cupling 1-1 are provided with connection screw thread 1-1-1.Further, the insulating ring 1-3 preventing heat outwards to scatter and disappear can be set further in the annular space be made up of the periphery of box cupling 1-1 and the inner headed face of sleeve 1-2; Further, vacuum state can be set to by this annular space, to improve effect of heat insulation further.
Heat preservation mechanism forms primarily of inner central tube 2-1, the outer tube 2-2 being enclosed within inner central tube 2-1 outside, the complex heat-preservation cylinder 2-3 preventing heat outwards to scatter and disappear that is arranged on the annular space be made up of inner central tube 2-1 and outer tube 2-2.Fig. 2 is the partial enlargement vertical section structure schematic diagram of conversion bindiny mechanism in tubing centrilizer of the present invention, heat preservation mechanism and righting mechanism, shown in 2, wherein, outer tube 2-1 is arranged on the outside of inner central tube 2-1, the two ends up and down of inner central tube 2-1 are provided with connection screw thread, threaded upper ends is used for connection coupling 1-1, and lower end screw thread is used for connected pipes.Can be connected by welding procedure between inner central tube 2-1 with outer tube 2-2.Further, heat preservation mechanism can also comprise the insulation ring flat-plate 2-4 preventing heat outwards to scatter and disappear of the outside being arranged on outer tube 2-2.Further, the annular space that inner central tube 2-1 and outer tube 2-2 is formed also can also be set to vacuum state, to improve effect of heat insulation further.Further, heat preservation mechanism can also comprise the heat insulation 2-5 at upper and lower two ends, the outside being arranged on outer tube 2-2, and heat insulation 2-5 can make and the material that intensity is high low by coefficient of thermal conductivity.
Wherein, insulating ring 1-3, complex heat-preservation cylinder 2-3, insulation ring flat-plate 2-4 can be made up of the composite material with heat-insulation and heat-preservation function that the coefficient of heat conduction is low, and such as aluminium-foil paper and glass fibre cotton etc. have the composite material of heat-insulation and heat-preservation function.
The box cupling 1-1 of conversion bindiny mechanism is connected with the inner central tube 2-1 of heat preservation mechanism by connection screw thread.
Righting mechanism is primarily of righting main body 3-1, wiper block 3-2, and elasticity righting leaf spring 3-3 forms.Shown in composition graphs 2, wherein, the outside two ends that the periphery of righting main body 3-1 is provided with multiple rectangular the groove 3-1-1 for laying wiper block 3-2, righting main body 3-1 are provided with screw thread 3-1-2, and screw thread 3-1-2 place is provided with multiple circular hole 3-1-3 for laying set bolt 4-4; Wiper block 3-2 is arranged on the outside of righting main body 3-1, corresponding with the groove 3-1-1 of righting main body 3-1, the groove 3-2-1 of the rectangle equal with the quantity of groove 3-1-1 is provided with at the inner headed face of wiper block 3-2, elasticity righting leaf spring 3-3 is arranged in the space that is made up of the groove 3-1-1 of righting main body and the groove 3-2-1 of wiper block, and its effect supports wiper block 3-2.The periphery two sections of wiper block 3-2 be provided with prevent centralizer under enter the chamfering 3-2-2 of be hampered 30 degree in process.
The maximum outside diameter of wiper block 3-2 is greater than the maximum outside diameter of insulated tubing and other instrument on injection string.
Fixed mechanism marks closely 4-2, fixed jacket 4-3 by retainer ring 4-1, anti-rotation, set bolt 4-4 is formed.Wherein, retainer ring 4-1 is arranged on the outside two ends of outer tube 2-2 and passes through to connect with being threadedly connected on outer tube 2-2.Retainer ring 4-1 is provided with and marks closely hole, the inner headed face of retainer ring 4-1 is provided with the cannelure equal with the groove 3-1-1 quantity of righting main body, and the heat insulation 2-5 in heat preservation mechanism is arranged in the cannelure of this retainer ring 4-1.What anti-rotation marked closely that 4-2 is arranged on retainer ring 4-1 marks closely in hole; Fixed jacket 4-3 is placed on the two ends of righting main body 3-1 outside, and is connected with righting main body 3-1 by screw thread; The screw thread place of fixed jacket 4-3 is provided with the screw hole 4-1-1 equal with the circular hole 3-1-3 quantity of righting main body; The periphery of fixed jacket 4-3 is provided with the chamfering of 30 degree; Bolt is arranged in the screw hole of fixed jacket 4-3 and the circular hole 3-1-3 of righting main body.
The screw thread arranged in tubing centrilizer of the present invention can adopt the screw thread of standard.
Below the operating principle of tubing centrilizer of the present invention is described.
Tubing centrilizer of the present invention is connected to the diverse location of injection string according to actual requirement, when thick oil filling multielement hot fluid or steam injection are produced, be connected with the lower end screw thread of injection string insulated tubing by the screw thread 1-1-1 on box cupling 1-1 top in the conversion bindiny mechanism of tubing centrilizer of the present invention, be connected with the box cupling screw thread of injection string insulated tubing by the lower end screw thread of the inner central tube 2-1 of tubing centrilizer.Maximum outside diameter due to the wiper block 3-2 of tubing centrilizer of the present invention is greater than the maximum outside diameter of insulated tubing on injection string (and other instrument), enter, meet when tripping out the risk of card under reducing instrument, like this, enter under whole injection string in process, contact sleeve inside pipe wall be the wiper block 3-2 of tubing centrilizer, on the one hand, tubing centrilizer of the present invention not only serves the effect of righting tubing string, and ensure that the property placed in the middle of whole tubing string does not contact with internal surface of sleeve pipe with the box cupling of insulated tubing; On the other hand, tubing centrilizer of the present invention is provided with heat preservation mechanism, and the elasticity righting leaf spring 3-3 arranged in righting mechanism, tubing centrilizer of the present invention is made to be provided with good heat-proof quality and elasticity righting function, improve the heat-proof quality of whole injection string, be applicable to the casing programme of marine horizontal well thermal recovery complexity well, meet the demand of Offshore Heavy Oil Field note high temperature polyol hot fluid or production of steam.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content only adopts for ease of understanding the present invention, and be not used to limit the present invention.Those of skill in the art belonging to any the present invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be carried out in the form implemented and details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (14)
1. a tubing centrilizer, is characterized in that, comprises conversion bindiny mechanism, heat preservation mechanism, righting mechanism and fixed mechanism; Wherein,
The complex heat-preservation cylinder that heat preservation mechanism comprises inner central tube, is enclosed within the outer tube of inner central tube outside, is arranged on the annular space be made up of inner central tube and outer tube;
Righting mechanism comprises righting main body, wiper block, and is arranged on the elasticity righting leaf spring in the space that is made up of the groove of righting main body and the groove of wiper block;
The maximum outside diameter of wiper block is greater than the maximum outside diameter of insulated tubing on injection string;
The box cupling of conversion bindiny mechanism is connected with the inner central tube of heat preservation mechanism by screw thread;
Conversion bindiny mechanism comprises box cupling, is enclosed within sleeve outside box cupling;
The retainer ring of fixed mechanism is arranged on outside pipe two ends and is threaded connection in outer tube.
2. tubing centrilizer according to claim 1, is characterized in that, in the annular space be made up of the periphery of described box cupling and the inner headed face of described sleeve, arrange insulating ring;
Described insulating ring is made up of the composite material with heat-insulation and heat-preservation function that the coefficient of heat conduction is low.
3. tubing centrilizer according to claim 2, is characterized in that, is vacuum state in described annular space.
4. the tubing centrilizer according to any one of claims 1 to 3, is characterized in that, described box cupling is connected by welding procedure with between sleeve.
5. tubing centrilizer according to claim 1, is characterized in that, described heat preservation mechanism also comprises the insulation ring flat-plate of the outside being arranged on described outer tube;
Described insulation ring flat-plate is made up of the composite material with heat-insulation and heat-preservation function that the coefficient of heat conduction is low.
6. tubing centrilizer according to claim 5, is characterized in that, the annular space that described inner central tube and described outer tube are formed is vacuum state.
7. the tubing centrilizer according to claim 1,5 or 6, is characterized in that, is connected between described inner central tube with described outer tube by welding procedure.
8. tubing centrilizer according to claim 1, is characterized in that, the groove of described righting main body is arranged on the periphery of righting main body, and be rectangular groove, quantity is one or more;
The groove of described wiper block is arranged on the inner headed face of wiper block, is rectangular groove, equal with described righting main body quantity;
Described wiper block is arranged on the outside of described righting main body, corresponding with the groove of described righting main body.
9. tubing centrilizer according to claim 8, is characterized in that, the outside two ends of described righting main body are provided with screw thread, and screw thread place is provided with multiple circular hole.
10. the tubing centrilizer according to claim 1,8 or 9, is characterized in that, the periphery two sections of described wiper block is provided with the chamfering of 30 degree.
11. tubing centrilizers according to claim 9, is characterized in that, described fixed mechanism comprises retainer ring, anti-rotation is marked closely, fixed jacket, set bolt; Wherein,
Retainer ring is provided with and marks closely hole, the inner headed face of retainer ring is provided with the cannelure equal with the number of recesses of described righting main body;
Anti-rotation mark closely be arranged on retainer ring mark closely in hole;
Fixed jacket is placed on the two ends of described righting body exterior, and is connected with described righting main body by screw thread; The screw thread place of fixed jacket is provided with the screw hole equal with the circular hole quantity of described righting main body; Bolt is arranged in the screw hole of fixed jacket and the circular hole of described righting main body.
12. tubing centrilizers according to claim 11, is characterized in that, the periphery of described fixed jacket is provided with the chamfering of 30 degree.
13. tubing centrilizers according to claim 11 or 12, it is characterized in that, described heat preservation mechanism also comprises the heat insulation at upper and lower two ends, the outside being arranged on described outer tube;
Described heat insulation is arranged in the cannelure of described retainer ring.
14. tubing centrilizers according to claim 13, is characterized in that, described heat insulation and material that intensity high low by coefficient of thermal conductivity is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219337.7A CN103277055B (en) | 2013-06-04 | 2013-06-04 | Tubing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219337.7A CN103277055B (en) | 2013-06-04 | 2013-06-04 | Tubing centralizer |
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| Publication Number | Publication Date |
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| CN103277055A CN103277055A (en) | 2013-09-04 |
| CN103277055B true CN103277055B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310219337.7A Active CN103277055B (en) | 2013-06-04 | 2013-06-04 | Tubing centralizer |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055979A (en) * | 1991-06-26 | 1991-11-06 | 石油大学 | Diameter-regulating centralizing device |
| US6023027A (en) * | 1996-05-03 | 2000-02-08 | Neff; Scott E. | Cable guard having a hinge rod and for protecting cables extending along a tubing string |
| CN2693940Y (en) * | 2004-04-06 | 2005-04-20 | 潘昌德 | Compression high temperature steam injection packer |
| CN101644372A (en) * | 2009-08-21 | 2010-02-10 | 湖北贵族真空科技股份有限公司 | Vacuum compound heat insulating pipe |
| CN202745725U (en) * | 2012-06-20 | 2013-02-20 | 盘锦鑫富远石油机械厂 | Heat insulation pipe centralizer |
-
2013
- 2013-06-04 CN CN201310219337.7A patent/CN103277055B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055979A (en) * | 1991-06-26 | 1991-11-06 | 石油大学 | Diameter-regulating centralizing device |
| US6023027A (en) * | 1996-05-03 | 2000-02-08 | Neff; Scott E. | Cable guard having a hinge rod and for protecting cables extending along a tubing string |
| CN2693940Y (en) * | 2004-04-06 | 2005-04-20 | 潘昌德 | Compression high temperature steam injection packer |
| CN101644372A (en) * | 2009-08-21 | 2010-02-10 | 湖北贵族真空科技股份有限公司 | Vacuum compound heat insulating pipe |
| CN202745725U (en) * | 2012-06-20 | 2013-02-20 | 盘锦鑫富远石油机械厂 | Heat insulation pipe centralizer |
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| CN103277055A (en) | 2013-09-04 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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