CN209228313U - A kind of high temperature resistant hollow stem connection sealing structure - Google Patents
A kind of high temperature resistant hollow stem connection sealing structure Download PDFInfo
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- CN209228313U CN209228313U CN201821512391.5U CN201821512391U CN209228313U CN 209228313 U CN209228313 U CN 209228313U CN 201821512391 U CN201821512391 U CN 201821512391U CN 209228313 U CN209228313 U CN 209228313U
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- screw thread
- hollow stem
- lower contact
- sealing structure
- top connection
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Abstract
The utility model discloses a kind of high temperature resistant hollow stems to connect sealing structure, and including the lower contact and top connection being connected, the lower contact outer wall offers external screw thread, and top connection inner wall offers internal screw thread, constitutes screw thread type connection；The lower end of the lower contact offers male cone (strobilus masculinus), and the top connection inner wall offers inner conical surface, the male cone (strobilus masculinus) of lower contact and the inner conical surface of top connection rear formation conical surface sealing structure in mating connection；The male cone (strobilus masculinus) top edge opens up outer chamfer at external screw thread lower end, and the inner conical surface top edge opens up inner chamfer at internal screw thread lower end, and outer chamfer and inner chamfer are cooperatively connected.The utility model is designed using metal end face self sealing structure, realize radial end face sealing, cooperate the research of refractory seals filler again, pass through the complex fire resistant the Seal Technology Study of two methods, realize prolonged application of the hollow stem in 350-370 DEG C of hot environment, realization is mixed note high-temperature steam and smoothly implemented along the hollow stem oil reservoir that goes directly.
Description
Technical field
The utility model relates to hollow stem, specifically a kind of high temperature resistant hollow stem connects sealing structure.
Background technique
Shengli Oil Field western part block heavy oil reserves are abundant.82,090,000 tons of spring breeze oil field proved reserves, control reserve 81,970,000
Ton.It is main that integral process exploitation is adopted using note, it is realized using sucker rod+main material integrated pump, be cannot achieve in process of production
Note viscosity reduction is mixed under pump；Adopting binary channels hollow pump using hollow stem+note may be implemented steam under pump in production process and mixes heat injection to follow
Ring viscosity reduction, but hollow stem is needed to have good refractory seals performance, and existing hollow stem rubber seal is unable to satisfy note and steams
Vapour needs resistant to high temperature, existing hollow stem rely on rubber seal rings for seal, and heatproof can only achieve 120-208 DEG C, and well head and note
Vapour is but up to 350-370 DEG C along journey vapor (steam) temperature, and sealing ring, which is quickly damaged, loses sealing performance, so as to cause the mistake of entire technique
It loses.
By retrieving hollow stem technical field, the public technology with the application same technique scheme is not found.
Application number: 201310459823.6, publication date 2013-12-25 disclose a kind of high-temperature-resistant high-pressure-resistant note and adopt one
Change double layer hollow sucker rod.In order to overcome existing steam process technology to need using gas injection, two casing strings of oil recovery, and sealing
Effect is not able to satisfy the deficiency of steam injection job requirements, and the top connection of hollow stem of the present invention, the body of rod, lower contact are from top to bottom successively
It is fixedly connected；Central tube is located in hollow stem, is annular space between the outer tube and inner tube of central tube；Lower contact connection screw thread upper end
Metal o-ring I is installed, the upper end surface of lower contact connection screw thread is equipped with metallic gasket in annular groove；Central tube it is interior
Metal o-ring II is installed between pipe lower end and lower fixing sleeve.The beneficial effect is that it is structurally reasonable, using metal o-ring
With high-temperature-resistant high-pressure-resistant performance, it can satisfy the needs of steam injection technique；It can be realized lower one-trip string to complete steam injection, adopt
This technological gap of super-viscous oil steam injection recovery integrated pipe column has been filled up in oily production operation.
Application number: 201621081398.7, publication date 2017-04-26 disclose a kind of hollow rod elevated-temperature seal company
Connection device, wherein device includes the top connection and lower contact being connected up and down, the lower contact upper section outer wall and top connection lower section
Closed annular space is formed between inner wall, and sealing element is installed in the annular space.The top connection inner cavity is up successively opened up from lower end
Expanding hole section and undergauge hole section, wherein undergauge hole section inner wall opens up internal screw thread, and the lower contact outer wall is successively opened down from upper end
If minor diameter pipeline section and major diameter pipeline section, medium-small diameter pipeline section outer wall opens up external screw thread, and the minor diameter pipeline section is inserted into undergauge
Hole section is attached by the screw thread of the two.The sealing element includes successively being axially disposed in closed annular space from top to bottom
Metal compensation sealing part, nonmetallic compensation sealing part, the utility model solve hollow rod junction elevated-temperature seal difference and lead
Cause vulnerable problem.
Application number: 201810069962.0, publication date 2018-07-17 disclose a kind of carbon fibre pumping rod and steel is taken out
Beam hanger jointing, comprising: connection sleeve is threadedly coupled with half a month formula slips connector and polished rod；Clamp sleeve, with half a month
The connection of formula slips joint screw thread；Half a month formula slips connector, one end are threadedly coupled with the connection sleeve, the half a month formula slips
The connector other end is threadedly coupled with the clamp sleeve, and carbon fiber pushes away beam hanger and passes through high-temperature resin and the half a month formula slips connector
The connection of other end inner wall, a pair of half a month formula slips connector pairing connection.The present invention also provides a kind of carbon fibre pumping rods
With the installation method of pumping rod made by steel jointing.Beneficial effects of the present invention: greatly increasing bonding strength, improves connector
Reliability, effectively avoid the disconnected de- problem of sucker rod；Using modular connection type, have good structural, is convenient for
In-site installation and replacement solve existing connector installation complexity, are not easy to the status of replacement.
Application number: 201620777218.2, it is continuous that publication date 2017-02-08 discloses a kind of fibre reinforced composites
Sucker rod high temperature resistant built-up joint.Its technical solution is: combination jointing include upper binding head, bonded joint, transition joint,
Four parts of pressure joint, upper binding head external screw thread connect upper end polished rod by metal box cupling or connect lower end by active joint
Weighted lever；It is connected through a screw thread between upper binding head and bonded joint, passes through transition joint between bonded joint and pressure joint
Connection, pressure joint is made of inner cone and external conical sleeve, by rotating transition joint, under push away pressure joint inner cone, make inner space
It reduces, holds dimension enhancing composite continuous sucker rod tightly；Back taper structure is used inside bonded joint, is bonded using fire resistant resin
Carbon fibre pumping rod and metal joint.The beneficial effects of the utility model are: composite structure can effectively improve bonding strength, simultaneously
It can solve the problem of single structure may fail in use.
Utility model content
The purpose of this utility model is to provide a kind of high temperature resistant hollow stems to connect sealing structure, using metal end face from close
Seal structure design realizes radial end face sealing, then cooperates the research of refractory seals filler, passes through the compound resistance to height of two methods
Warm the Seal Technology Study, realizes prolonged application of the hollow stem in 350-370 DEG C of hot environment, and realization mixes note high-temperature steam along empty
The through oil reservoir of core bar is smoothly implemented.
In order to achieve the above objectives, the utility model uses following technical solution, and a kind of high temperature resistant hollow stem connection is close
Seal structure, including the lower contact and top connection being connected, the lower contact outer wall offers external screw thread, and top connection inner wall offers
Internal screw thread constitutes screw thread type connection；The lower end of the lower contact offers male cone (strobilus masculinus), and the top connection inner wall offers inner cone
Face, the male cone (strobilus masculinus) of lower contact and the inner conical surface of top connection rear formation conical surface sealing structure in mating connection；The male cone (strobilus masculinus) top
Edge opens up outer chamfer at external screw thread lower end, and the inner conical surface top edge opens up inner chamfer at internal screw thread lower end, falls outside
Angle and inner chamfer are cooperatively connected.
The top connection upper surface opens up annular groove, and gasket is placed in the groove, and the lower contact outer wall opens up outer
Shoulder, gasket is by outer ring shoulder and annular groove pressing sealing.
Sealing ring is arranged in lower contact external screw thread root.
The gasket is elastic sealing gasket.
The lower contact upper end connects upper hollow stem, and top connection lower end connects lower hollow stem.
The utility model has the advantages that compared with prior art
It slots in hollow stem female thread upper surface, and inserts refractory seals pad at fluting；Gasket material uses carbon fiber
Dimension semi-finished product are combined with graphite+tool cementability oxidization fiber, realize elastic packing；A chamfering is set at pin thread, in the mother of connection
Buckle accordingly sets a chamfering, and pin thread and the female thread conical surface when tightening tightly are meshed together, and realizes end face seal.
By the complex fire resistant the Seal Technology Study of two methods, hollow stem answering in 350-370 DEG C of hot environment for a long time is realized
With realization is mixed note high-temperature steam and smoothly implemented along the hollow stem oil reservoir that goes directly.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of high temperature resistant hollow stem of the utility model connects sealing structure；
Fig. 2 is chamfering junction enlarged drawing.
In figure: lower contact 1, annular groove 2, chamfering junction 3, top connection 4.
Specific embodiment
Detailed description and technology contents in relation to the utility model, cooperation Detailed description of the invention is as follows, however attached drawing is only to refer to
With purposes of discussion, not it is used to limit the utility model.
According to Fig. 1 and Fig. 2, a kind of high temperature resistant hollow stem connection sealing structure, including the lower contact 1 being connected and top connection
4, the lower end of the lower contact offers male cone (strobilus masculinus), and the top connection inner wall offers inner conical surface, the male cone (strobilus masculinus) of lower contact and upper
Conical surface sealing structure is formed after the inner conical surface of connector is in mating connection.The lower contact outer wall offers external screw thread, in top connection 4
Wall offers internal screw thread, constitutes screw thread type connection；The male cone (strobilus masculinus) top edge opens up outer chamfer at external screw thread lower end, described
Inner conical surface top edge opens up inner chamfer at internal screw thread lower end, and outer chamfer and inner chamfer are cooperatively connected, i.e., the chamfering in figure connects
Meet place 3.
The top connection upper surface opens up annular groove 2, and gasket is placed in the groove, and the lower contact outer wall opens up outer
Shoulder, gasket is by outer ring shoulder and annular groove pressing sealing.Gasket is elastic sealing gasket.
Sealing ring is arranged in lower contact external screw thread root.The lower contact upper end connects upper hollow stem, top connection lower end
Connect lower hollow stem.
It slots in the female thread upper surface 2 of top connection 4, and inserts refractory seals pad at 2 fluting of female thread upper surface, sealing
Cushion material is combined using carbon fiber semi-finished product with graphite+tool cementability oxidization fiber, is mixed by the ratio uniform of 1:1:1, warp
Abrasive tool moulding, then hot setting sizing, are made the refractory seals part of needs.Realize elastic packing；In the pin thread of lower contact 1
Spherical arc is designed at lower end surface, cone angle structure is designed in the lower end surface of 4 female thread of top connection of connection, so that lower contact 1 is public
Button, which tightens rear cone with 4 female thread of top connection, effectively to be meshed together with spherical arc, realize end face seal；In recycling
Compressive seal at 2 fluting of end face provides pretightning force, it is ensured that the screw thread of engagement will not loosen easily.
The above is only the preferred embodiment of the present invention, non-the scope of the patents to limit the utility model,
He uses the equivalence changes of the utility model patent spirit, should all belong to the scope of the patents of the utility model.
Claims (5)
1. a kind of high temperature resistant hollow stem connects sealing structure, including the lower contact and top connection being connected, the lower contact outer wall
External screw thread is offered, top connection inner wall offers internal screw thread, constitutes screw thread type connection；It is characterized in that, under the lower contact
End offers male cone (strobilus masculinus), and the top connection inner wall offers inner conical surface, and the male cone (strobilus masculinus) of lower contact and the inner conical surface of top connection match
Conical surface sealing structure is formed after closing connection；The male cone (strobilus masculinus) top edge opens up outer chamfer, the inner cone at external screw thread lower end
Face top edge opens up inner chamfer at internal screw thread lower end, and outer chamfer and inner chamfer are cooperatively connected.
2. a kind of high temperature resistant hollow stem according to claim 1 connects sealing structure, which is characterized in that in the top connection
End face opens up annular groove, and gasket is placed in the groove, and the lower contact outer wall opens up outer ring shoulder, and gasket is by outer ring
Shape shoulder and annular groove pressing sealing.
3. a kind of high temperature resistant hollow stem according to claim 1 or 2 connects sealing structure, which is characterized in that connect under described
Sealing ring is arranged in head external screw thread root.
4. a kind of high temperature resistant hollow stem according to claim 2 connects sealing structure, which is characterized in that the gasket is
Elastic sealing gasket.
5. a kind of high temperature resistant hollow stem according to claim 4 connects sealing structure, which is characterized in that in the lower contact
End connects upper hollow stem, and top connection lower end connects lower hollow stem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512391.5U CN209228313U (en) | 2018-09-14 | 2018-09-14 | A kind of high temperature resistant hollow stem connection sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512391.5U CN209228313U (en) | 2018-09-14 | 2018-09-14 | A kind of high temperature resistant hollow stem connection sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209228313U true CN209228313U (en) | 2019-08-09 |
Family
ID=67498795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821512391.5U Active CN209228313U (en) | 2018-09-14 | 2018-09-14 | A kind of high temperature resistant hollow stem connection sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209228313U (en) |
-
2018
- 2018-09-14 CN CN201821512391.5U patent/CN209228313U/en active Active
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