CN202882873U - Underground steam injection heat insulation compensation device - Google Patents
Underground steam injection heat insulation compensation device Download PDFInfo
- Publication number
- CN202882873U CN202882873U CN 201220574795 CN201220574795U CN202882873U CN 202882873 U CN202882873 U CN 202882873U CN 201220574795 CN201220574795 CN 201220574795 CN 201220574795 U CN201220574795 U CN 201220574795U CN 202882873 U CN202882873 U CN 202882873U
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- heat insulation
- sealer
- steam injection
- pipe
- vacuum heat
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Abstract
The utility model discloses an underground steam injection heat insulation compensation device which comprises a coupling, a vacuum heat insulation pipe, a sealer, a compaction plug, an inner pipe penetrating through the compaction plug and the sealer an inserted into the vacuum heat insulation pipe, limit sleeves arranged at two ends of the inner pipe, a lower connector and sealing materials arranged inside the sealer, wherein the coupling, the vacuum heat insulation pipe, the sealer and the compaction plug are sequentially connected, and the limit sleeves are arranged inside the vacuum heat insulation pipe. The underground steam injection heat insulation compensation device is characterized in that the limit sleeves are integrated with the inner pipe, circular end faces, corresponding to the sealer, of the limit sleeves are correspondingly provided with tooth-shaped gear teeth capable of being mutually meshed and transmitting torque unidirectionally. The underground steam injection heat insulation compensation device has the advantages of being capable of greatly improving connection tensile strength between the limit sleeves and the inner pipe, enabling the smallest drift diameter of the inner pipe to be expanded into an ordinary state inside the limited pipe cavity of the vacuum heat insulation pipe, driving the inner pipe to be buckled inversely and separated from the lower connector due to the fact that a heat insulation pipe column is turned to drive the sealer to turn reversely when an underground thermosensitive packer is blocked, enabling the inner pipe to be smoothly taken out, ensuring continuous work and being high in working reliability.
Description
Technical field
The utility model belongs to a kind of tools for downhole of oil field, particularly a kind of down-hole steam injection heat insulation compensation apparatus for thick.
Background technology
The oil field well need of viscous oil recovery before the oil well steam injection, is lowered to heat-proof string to the stratum steam injection in pit shaft, steam imports the stratum by heat-proof string, reaches the reducing thick oil viscosity purpose, so that smoothly extraction.Be to reduce heat waste, protection well inner sleeve connects the steam injection thermosensitive packer usually in the heat-proof string lower end, make steam import the stratum by heat-proof string before, no longer return the formed annular space of well inner sleeve and heat-proof string.There is the phenomenon of expanding with heat and contract with cold in heat-proof string in the steam injection process, need to be on the steam injection thermosensitive packer compensating mechanism for connection, to overcome owing to the heat-proof string heat-sensitive packer that causes its lower end to connect that expands with heat and contract with cold lost efficacy.
Traditional compensation arrangement body uses plain tubing, does not do heat insulation processing, can cause larger heat waste in the steam injection process.CN2864088 discloses a kind of heat-proof down-well compensator for steam injection, its structure is box cupling, vacuum heat insulation tube, sealer and the compression plug that connects by successively, run through and compress plug and sealer and be inserted into the interior inner tube of vacuum heat insulation tube, be connected to inner tube box cupling and the lower contact at inner tube two ends, and the airtight and watertight padding that is located in the sealer consists of.The problem that this expansion loop exists is: 1, since inner tube box cupling and inner tube be threaded connection, limited by the caliber of inner tube and vacuum heat insulation tube, the wall thickness of inner tube box cupling is less, therefore inner tube box cupling and inner tube to be connected tensile strength lower, inner tube box cupling easy " strip button " when carrying expansion loop on behind the steam injection, functional reliability is low; 2, between inner tube and the sealer for being slidingly matched, can not transmitting torque, in a single day be connected to the heat-sensitive packer generation screens of lower contact lower end when carrying expansion loop on behind the steam injection, just be difficult to inner tube is proposed, cause subsequent job to continue.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of inner tube tensile strength high, and heat-sensitive packer generation screens also can propose inner tube, can guarantee to work continuously the down-hole steam injection heat insulation compensation apparatus for thick that functional reliability is high.
The down-hole steam injection heat insulation compensation apparatus for thick that the utility model relates to comprises box cupling, vacuum heat insulation tube, sealer and the compression plug that connects successively, run through and compress plug and sealer and be inserted into the interior inner tube of vacuum heat insulation tube, be located at stop collar and the lower contact at inner tube two ends, and be located at airtight and watertight padding in the sealer, described stop collar is positioned at vacuum heat insulation tube, its special character is: described stop collar and inner tube are structure as a whole, but on the stop collar annular end face corresponding with sealer the corresponding sawtooth pattern teeth that are provided with mutually interlock and unidirectional delivery moment of torsion.
Above-mentioned down-hole steam injection heat insulation compensation apparatus for thick, the mutual interlock transmitting torque of the sawtooth pattern teeth when sealer is rotated counterclockwise on described stop collar and the sealer.
The utility model has the advantages that: because stop collar and inner tube be structure as a whole, therefore can greatly improve the tensile strength that is connected of stop collar and inner tube, the while is in the tube chamber of limited vacuum heat insulation tube, so that the minimum latus rectum of inner tube increases to state commonly used; But owing to the corresponding sawtooth pattern teeth that are provided with mutually interlock and unidirectional delivery moment of torsion on the stop collar annular end face corresponding with sealer, when the down-hole heat-sensitive packer is met card, by the counter-rotating of rotation heat-proof string band dynamic sealer, just can drive the inner tube back-off and break away from lower contact, inner tube can be proposed smoothly, can guarantee to work continuously, functional reliability is high.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: box cupling 1, vacuum heat insulation tube 2, stop collar 3, inner tube 4, sealer 5, airtight and watertight padding 6 compresses plug 7, lower contact 8, sawtooth pattern teeth 9.
The specific embodiment
As shown in the figure, the down-hole steam injection heat insulation compensation apparatus for thick that the utility model relates to comprises the box cupling 1 that is threaded connection successively, vacuum heat insulation tube 2, sealer 5 from top to bottom and compresses plug 7, is connected with sealer by external screw thread and box cupling 1 respectively and is connected in the two ends of vacuum heat insulation tube 2.Be inserted with inner tube 4 in vacuum heat insulation tube 2, inner tube 4 runs through compression plug 7 and sealer 5, is respectively equipped with stop collar 3 and lower contact 8 at inner tube 4 two ends, and lower contact 8 is threaded connection with inner tube 4 lower ends.Described stop collar 3 is positioned at vacuum heat insulation tube 2 and is structure as a whole with inner tube 4, inner tube 4 upper ends are stuck in the vacuum heat insulation tube 2 by stop collar 3, but the corresponding sawtooth pattern teeth 9 that are provided with mutually interlock and unidirectional delivery moment of torsion on the corresponding annular end face of stop collar 3 and sealer 5, the sawtooth pattern teeth 9 when sealer 5 is rotated counterclockwise on described stop collar 3 and the sealer 5 are the interlock transmitting torque mutually.In the toroidal cavity of sealer 5 endoporus and inner tube 4 formation airtight and watertight padding 6 is housed, airtight and watertight padding 6 compresses by described compression plug 7.Described inner tube 4 is common steel tube, to reduce cost; Also can be vacuum heat insulation tube, to improve heat insulation and preservation effect.
During use, this down-hole steam injection heat insulation compensation apparatus for thick upper end will be connected with the steam injection heat-proof string by box cupling 1, the lower end can connect the steam injection thermosensitive packer by lower contact 8, and one of heat-sensitive packer lower end connection extremely several oil pipes imports the stratum with steam; Also can be as required between lower contact 8 and steam injection thermosensitive packer, be connected one to several insulated tubings.When the steam injection well began, heat-proof string raise with temperature and extends, before bottom hole temperature (BHT) rises to 200 ℃, this compensation arrangement moves down with heat-proof string, when downhole temperature rises to about 200 ℃, heat-sensitive packer is setting, and this moment, downhole temperature continued to raise, heat-proof string raises with temperature and continues elongation, promote vacuum heat insulation tube 2 and move down, make in the inner tube 4 retraction vacuum heat insulation tubes 2, play the compensation heat-blocking action, no longer raise until downhole temperature rises to about 300 ℃, this compensation arrangement is finished compensation.The length of described inner tube 4 is to get according to its depth calculation that is positioned at the down-hole, and when downhole temperature rises to when no longer raising about 300 ℃, inner tube 4 all enters in the vacuum heat insulation tube 2.During normal steam injection, down-hole string all is in the heat-insulation and heat-preservation state.Carry heat-proof string on after the steam injection, be stuck on the sealer 5 to drive on this compensation arrangement and the heat-sensitive packer by inner tube 4 and move, when heat-sensitive packer is met card, by 5 counter-rotatings of rotation heat-proof string band dynamic sealer, because the sawtooth pattern teeth 9 mutual interlocks of sealer 5 and stop collar 3, just can drive inner tube 4 back-offs and break away from lower contact 8, inner tube 4 can be proposed smoothly, and then be lowered to Special fishing tool and salvage heat-sensitive packer and get final product.
Claims (2)
1. down-hole steam injection heat insulation compensation apparatus for thick, comprise the box cupling, vacuum heat insulation tube, sealer and the compression plug that connect successively, run through and compress plug and sealer and be inserted into the interior inner tube of vacuum heat insulation tube, be located at stop collar and the lower contact at inner tube two ends, and be located at airtight and watertight padding in the sealer, described stop collar is positioned at vacuum heat insulation tube, it is characterized in that: described stop collar and inner tube are structure as a whole, but on the stop collar annular end face corresponding with sealer the corresponding sawtooth pattern teeth that are provided with mutually interlock and unidirectional delivery moment of torsion.
2. steam injection heat insulation compensation apparatus for thick in down-hole according to claim 1 is characterized in that: the mutual interlock transmitting torque of the sawtooth pattern teeth when sealer is rotated counterclockwise on described stop collar and the sealer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220574795 CN202882873U (en) | 2012-10-22 | 2012-10-22 | Underground steam injection heat insulation compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220574795 CN202882873U (en) | 2012-10-22 | 2012-10-22 | Underground steam injection heat insulation compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202882873U true CN202882873U (en) | 2013-04-17 |
Family
ID=48074313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220574795 Expired - Fee Related CN202882873U (en) | 2012-10-22 | 2012-10-22 | Underground steam injection heat insulation compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202882873U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778299A (en) * | 2019-11-12 | 2020-02-11 | 盘锦兴隆石化机械有限公司 | Steam injection heat insulation underground compensator |
| CN110905468A (en) * | 2019-11-12 | 2020-03-24 | 盘锦兴隆石化机械有限公司 | Heat-insulation underground multistage compensator for oil field steam injection well |
-
2012
- 2012-10-22 CN CN 201220574795 patent/CN202882873U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778299A (en) * | 2019-11-12 | 2020-02-11 | 盘锦兴隆石化机械有限公司 | Steam injection heat insulation underground compensator |
| CN110905468A (en) * | 2019-11-12 | 2020-03-24 | 盘锦兴隆石化机械有限公司 | Heat-insulation underground multistage compensator for oil field steam injection well |
| CN110905468B (en) * | 2019-11-12 | 2021-11-09 | 盘锦兴隆石化机械有限公司 | Heat-insulation underground multistage compensator for oil field steam injection well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20131022 |