CN104295278A - Thermal recovery compensation sealed pipe column - Google Patents
Thermal recovery compensation sealed pipe column Download PDFInfo
- Publication number
- CN104295278A CN104295278A CN201310304247.8A CN201310304247A CN104295278A CN 104295278 A CN104295278 A CN 104295278A CN 201310304247 A CN201310304247 A CN 201310304247A CN 104295278 A CN104295278 A CN 104295278A
- Authority
- CN
- China
- Prior art keywords
- pipe
- sealing
- thermal recovery
- sealed
- tubing string
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 229920006169 Perfluoroelastomer Polymers 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 229910000963 austenitic stainless steel Inorganic materials 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 229920001774 Perfluoroether Polymers 0.000 abstract 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract 1
- 238000003466 welding Methods 0.000 abstract 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a thermal recovery compensation sealed pipe column. The thermal recovery compensation sealed pipe column comprises an inner pipe and an outer pipe; the inner pipe is sleeved with the outer pipe; the lower end of the inner pipe extends out of the outer side of the outer pipe; a sealed corrugated pipe is arranged between the inner pipe and the outer pipe; a sealing system is arranged on the outer pipe, and comprises a seal sleeve; a sealing cavity is formed inside the seal sleeve; independent sealing grooves are respectively formed in the upper end and the lower end of the sealing cavity; seal rings are mounted in the sealing grooves, and adopt fluoroether rubber seal rings; an injecting hole leading to the sealing cavity is formed in the seal sleeve. The thermal recovery compensation sealed pipe column has the advantages that the outer contact surface of the inner pipe is subjected to chromate finish, so that the abrasive resistance, the anti-corrosion property, the leakproofness and the like are improved, high temperature steam is prevented from corroding the contact surface, and the sealing problem due to friction which is caused by the fact that the inner pipe and the outer pipe displace, is prevented; the stainless steel sealed corrugated pipe is designed between the inner pipe and the outer pipe, and connects the inner pipe with the outer pipe through welding, the outer pipe is provided with an inner seal sleeve, and the sealed corrugated pipe is made of austenitic stainless steel. Therefore, the temperature resistance and the corrosion resistance of the sealed corrugated pipe are ensured.
Description
Technical field
The present invention relates to compensation tubing string, the thermal recovery compensation sealing tubing string of specifically steam injection in a kind of thickened oil recovery process.
Background technology
Current heavy oil wells generally adopts oil recovery by heating mode to develop; heat-proof string will be adopted during steam injection to reduce thermal diffusion; cement sheath outside protective casing and sleeve pipe; thermal compensation tubing string is the important component part of steam injection string, and its major function is the tubing string length change compensated because well casing variations in temperature causes.Used thermal recovery compensates the tubing string concentric sealing telescopic pipe of many employings general dual layer or the double-deck sealing telescopic pipe with one heart of elastic compensating.At present in steam-drive process, also higher to telescoping tube performance requirement.But the problems such as above two kinds of telescoping tubes all exist the easy fouling of outer wall of inner tube, sealing part abrasion is fast, and movable sealing cannot compensate, effect of heat insulation difference, thus cause the telescoping tube life-span short, the need of production of steam injection can not be met, affect steam injection quality, affect heavy crude heat extraction development effectiveness.
Summary of the invention
The object of the present invention is to provide a kind of thermal recovery compensation sealing tubing string, solve the easy fouling of outer wall of inner tube, sealing difference problem, protects outer seals, the tubing string length change that reliable and effective compensation causes because of well casing variations in temperature.
In order to reach above-mentioned purpose, present invention employs following technical scheme, a kind of thermal recovery compensation sealing tubing string, the Inner be nested inside and outside comprising manages and outer tube, and described Inner pipe lower end to be stretched out outside outer tube and and is provided with bellow seal pipe between outer tube.
Described outer tube is provided with sealing system.
Described sealing system mainly comprises sealing shroud, and described sealing shroud inside forms annular seal space.
Described annular seal space upper and lower side is provided with independently seal groove, installs sealing ring in seal groove.
Described sealing ring is perfluoroelastomers sealing ring.
Described sealing shroud is offered the injection hole towards annular seal space, annular seal space is sealed by the stop-leak compound injected.
Compared to prior art, the present invention has following beneficial effect:
In thermal recovery compensation sealing design of string pipe, chromium plating process is carried out in pipe outer contacting face, improves abrasion resistance, anticorrosive property, sealing etc., prevents that high-temperature steam from corroding contact surface, inner and outer pipes is subjected to displacement the sealing problem that friction etc. causes.
Between interior pipe outer tube, designing stainless steel ripple sealed tube, having inner seal sleeve by being welded to connect interior pipe outer tube, bellows adopts austenitic stainless steel, ensure that temperature tolerance and the corrosion resistance of bellows.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of thermal recovery compensation sealing of the present invention tubing string.
In figure: 1-outer tube; 2-sealing ring; 3-annular seal space; 4-injection hole; 5-bellow seal pipe; 6-Inner manages.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the present invention.
With reference to accompanying drawing 1, a kind of thermal recovery compensation sealing tubing string, this tubing string comprises outer tube 1, interior pipe 6, stainless steel ripple sealed tube 5, combination sealing system.Outer tube 1 is high vacuum insulated tubing, and interior pipe 6 is oil pipe, and to ensure that fluid does not produce throttling in circulation passage, bellow seal pipe 5 is by being welded to connect outer tube 1 and interior pipe 6.Sealing system is by stop-leak compound combination sealing in 2, front and back perfluoroelastomers sealing ring 2 and annular seal space 3, the seal groove of sealing ring 2 and annular seal space 3 are independently, stop-leak compound is injected by injection hole 4, and what sealing ring 2 effectively can reduce that stop-leak compound produces because of inner and outer pipes displacement carries loss.Chromium plating process is carried out in interior pipe 6 outer contacting face, improves abrasion resistance, anticorrosive property, sealing etc.Assemble stainless steel ripple sealed tube between outer tube 1 and interior pipe 6, by being welded to connect interior pipe outer tube, outer tube has inner seal sleeve, inner and outer pipes stroke can be compensated, and ensureing sealing, bellow seal pipe adopts austenitic stainless steel, ensure that temperature tolerance and the corrosion resistance of bellows.Outer tube is high vacuum insulated tubing, and interior pipe is oil pipe, and to ensure that fluid does not produce throttling in circulation passage, metal bellows is by being welded to connect outer tube and interior pipe.Sealing system is by stop-leak compound combination sealing in 2, front and back perfluoroelastomers sealing ring and intermediate seal chamber, and stop-leak compound is injected by injection hole.
In steam injection process, compensation sealing tubing string is with steam injection string G.I.H, be connected with instlated tubular or oil pipe down through screw thread, before going into the well, interior pipe 6 all pulled out, under enter design attitude, tubing string generation larger thermal expanding displacement in steam injection, interior pipe 6 retraction outer tube 1, in pipe, steam is sealed by sealing system, ensures not reveal, and keep good effect of heat insulation, promote steam injection quality.
Thermal recovery compensation sealing tubing string of the present invention is applied in viscous crude steam injection; interior pipe 6 external surface of chromium plating can prevent the fouling of interior pipe appearance; sealing system and bellow seal pipe effective sealing heat insulation, protective casing, reduce well casing heat waste, guarantee high-temperature steam safety, be effectively injected into object oil reservoir.Structure is simple, novel in design, and it is applied and has more significant Social benefit and economic benefit.
Be only preferred embodiment of the present invention described in upper, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (6)
1. a thermal recovery compensation sealing tubing string, is characterized in that, the Inner that is nested inside and outside comprising pipe and outer tube, and described Inner pipe lower end to be stretched out outside outer tube and and is provided with bellow seal pipe between outer tube.
2. a kind of thermal recovery compensation sealing tubing string according to claim 1, is characterized in that, described outer tube is provided with sealing system.
3. a kind of thermal recovery compensation sealing tubing string according to claim 2, it is characterized in that, described sealing system mainly comprises sealing shroud, and described sealing shroud inside forms annular seal space.
4. a kind of thermal recovery compensation sealing tubing string according to claim 3, it is characterized in that, described annular seal space upper and lower side is provided with independently seal groove, installs sealing ring in seal groove.
5. a kind of thermal recovery compensation sealing tubing string according to claim 4, it is characterized in that, described sealing ring is perfluoroelastomers sealing ring.
6. a kind of thermal recovery compensation sealing tubing string according to claim 3, is characterized in that, described sealing shroud is offered the injection hole towards annular seal space, and annular seal space is sealed by the stop-leak compound injected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310304247.8A CN104295278A (en) | 2013-07-19 | 2013-07-19 | Thermal recovery compensation sealed pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310304247.8A CN104295278A (en) | 2013-07-19 | 2013-07-19 | Thermal recovery compensation sealed pipe column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104295278A true CN104295278A (en) | 2015-01-21 |
Family
ID=52315195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310304247.8A Pending CN104295278A (en) | 2013-07-19 | 2013-07-19 | Thermal recovery compensation sealed pipe column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104295278A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014357A (en) * | 2016-05-17 | 2016-10-12 | 太原理工大学 | Oil gas slice mining method through in-situ heat injection in oil shale thick ore bed |
| CN107575263A (en) * | 2017-09-30 | 2018-01-12 | 太原理工大学 | A kind of device of underground heat injection enhanced gas extraction gas |
| CN111922657A (en) * | 2020-06-24 | 2020-11-13 | 宁波工程学院 | Automatic assembling device for brake master cylinder leather cup |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624484A (en) * | 1984-06-13 | 1986-11-25 | Atlantic Richfield Company | Shrink-fit connector for electrical well subsurface heating processes |
| CN201924842U (en) * | 2011-01-27 | 2011-08-10 | 中国石油化工股份有限公司 | Temperature control type casing compensator of thermal production wells |
| CN202031561U (en) * | 2011-03-22 | 2011-11-09 | 中国石油化工股份有限公司 | Thickened oil injection-production heat-insulation retractor device |
| CN102818084A (en) * | 2012-07-26 | 2012-12-12 | 中国石油化工股份有限公司 | Displacement compensation device for oil conveying pipeline of offshore platform |
| CN203452761U (en) * | 2013-07-19 | 2014-02-26 | 中国石油化工股份有限公司 | Thermal collecting compensating sealing tubular column |
-
2013
- 2013-07-19 CN CN201310304247.8A patent/CN104295278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624484A (en) * | 1984-06-13 | 1986-11-25 | Atlantic Richfield Company | Shrink-fit connector for electrical well subsurface heating processes |
| CN201924842U (en) * | 2011-01-27 | 2011-08-10 | 中国石油化工股份有限公司 | Temperature control type casing compensator of thermal production wells |
| CN202031561U (en) * | 2011-03-22 | 2011-11-09 | 中国石油化工股份有限公司 | Thickened oil injection-production heat-insulation retractor device |
| CN102818084A (en) * | 2012-07-26 | 2012-12-12 | 中国石油化工股份有限公司 | Displacement compensation device for oil conveying pipeline of offshore platform |
| CN203452761U (en) * | 2013-07-19 | 2014-02-26 | 中国石油化工股份有限公司 | Thermal collecting compensating sealing tubular column |
Non-Patent Citations (1)
| Title |
|---|
| 李英春等编著: "《氟化合物制备及应用》", 31 August 2010, 化学工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014357A (en) * | 2016-05-17 | 2016-10-12 | 太原理工大学 | Oil gas slice mining method through in-situ heat injection in oil shale thick ore bed |
| CN106014357B (en) * | 2016-05-17 | 2018-11-06 | 太原理工大学 | A kind of method of oil shale thick deposit original position heat injection separate zone production oil gas |
| CN107575263A (en) * | 2017-09-30 | 2018-01-12 | 太原理工大学 | A kind of device of underground heat injection enhanced gas extraction gas |
| CN111922657A (en) * | 2020-06-24 | 2020-11-13 | 宁波工程学院 | Automatic assembling device for brake master cylinder leather cup |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104295278A (en) | Thermal recovery compensation sealed pipe column | |
| CN104121431B (en) | A kind of wear-and corrosion-resistant liner insulated tubing | |
| CN203978312U (en) | Heat insulation box cupling | |
| CN203452761U (en) | Thermal collecting compensating sealing tubular column | |
| CN104847281A (en) | Direct connection type vacuum thermal-insulating oil pipe | |
| CN206554903U (en) | Thermal production well sleeve thermal stress compensator | |
| CN204804706U (en) | Heat insulation oil pipe coupling | |
| CN203730988U (en) | Axial corrugated pipe compensator with strengthened connecting structure | |
| CN103883828B (en) | Be provided with the axial corrugated expansion joint of strengthening linkage structure | |
| CN202990999U (en) | Thermal insulation connecting hoop of pipe column of heat-isolated oil pipe | |
| WO2012048535A1 (en) | Connection structure for insulated oil pipe | |
| CN102466108B (en) | Novel corrosion-resisting expansion appliance for pipelines | |
| CN202970610U (en) | Oil and gas well underground casing pipe packer rubber sleeve | |
| CN209511398U (en) | A kind of big axial compensator of lateral type | |
| CN202252489U (en) | Plunger piston type double-insurance pipeline compensator | |
| CN210164435U (en) | Heat-point-free heat-insulation tubing coupling heat-insulation structure | |
| CN203948821U (en) | A kind of good sealing effect, prefabricated direct-buried thermal insulation pipe easy to connect | |
| CN211901975U (en) | Seamless steel pipe with compensation function for pressure boiler | |
| CN103836290A (en) | Flange-connecting type single sleeve expansion joint | |
| CN106761440A (en) | Aerogel heat-proof oil pipe | |
| CN204042304U (en) | A kind of sleeve expansion joint | |
| CN204664650U (en) | For connecting the liner sliding sleeve of two straight tube ends | |
| CN103292067B (en) | A kind of steelframe reinforced petroleum pipeline | |
| CN206191131U (en) | Push jack formula tubular metal resonator quick -operation joint | |
| CN205956602U (en) | High temperature tube says compensation arrangement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |
|
| WD01 | Invention patent application deemed withdrawn after publication |