CN207245634U - A kind of helicitic texture of tubing and casing connection - Google Patents
A kind of helicitic texture of tubing and casing connection Download PDFInfo
- Publication number
- CN207245634U CN207245634U CN201721312787.0U CN201721312787U CN207245634U CN 207245634 U CN207245634 U CN 207245634U CN 201721312787 U CN201721312787 U CN 201721312787U CN 207245634 U CN207245634 U CN 207245634U
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- taper
- thread
- box cupling
- tube body
- laddertron
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Abstract
The utility model discloses a kind of helicitic texture of tubing and casing connection, including：Tube body and box cupling；Contain the inclined laddertron extracorporeal thread with taper on the end periphery of the tube body, the partially trapezoidal coupling inner thread with taper with the inclined laddertron extracorporeal thread interference fit with taper is contained on the both ends inner headed face of the box cupling；The first conical seal (contact) face is contained in the end of the inclined laddertron extracorporeal thread with taper, and the second conical seal (contact) face with first conical seal (contact) face interference fit is contained in the inner side of the partially trapezoidal coupling inner thread with taper；Tube body clamping torque shoulder is contained on the head of the tube body, and the interior hole portion of the box cupling contains the box cupling clamping torque shoulder that contact is engaged with the tube body clamping torque shoulder.By the above-mentioned means, the utility model can improve the bonding strength and sealing effect of screw thread, play the role of good overload-resistant moment of torsion, reduce the turbulent problem that pipe series winding connects rear oil gas flowing.
Description
Technical field
Tubing and casing field is the utility model is related to, more particularly to a kind of helicitic texture of tubing and casing connection.
Background technology
Single oil well pipe is formed by connecting by oil casing using screw thread, and the screw connection point of tubing string is most weak
Link.The tubing and casing of API standard uses short round thread, the type of attachment of long round thread and buttress thread.These types of attachment
In terms of ensureing tubular column structure integrality and sealing integrity all there are it is certain the problem of.For example, Round threaded casing, its screw thread connects
It is only the 60%~80% of tube body intensity to connect intensity, and although the bonding strength of buttress thread is close to or up to tube body intensity, still
Its leakproofness is relatively low.With the continuous development of domestic and international oil/gas well exploration and development, deep-well, ultradeep well, high-pressure oil-gas well, thermal recovery
Well, directional well largely occur, especially west area, and deep-well, ultradeep well, high pressure, sulfide hydrogen, carbon dioxide well day are cumulative
It is more, directional well, cluster well drilling technology and gaslift, the generally use of gas injection harvesting technique, API round threads and buttress thread
Have been unable to meet the requirement of above-mentioned working condition lower tubular column structural intergrity and sealing integrity.Meanwhile oil/gas well connects screw thread
The sealing performance that connects, bonding strength propose the requirement of higher.Therefore, improve and be threadedly coupled intensity, thread seal, antitorque anti-
The application range of the composite force special buckle screw threads such as compression constantly expands.
Utility model content
The utility model mainly solving the technical problems that：In view of the deficiencies of the prior art, there is provided a kind of tubing and casing connection
Helicitic texture, it is possible to increase the bonding strength and sealing effect of screw thread, play the role of good overload-resistant moment of torsion, reduce pipe
Series winding connects the turbulent problem of rear oil gas flowing.
In order to solve the above technical problems, the technical solution that the utility model uses is：A kind of tubing and casing connection is provided
Helicitic texture, including：Tube body and box cupling；Contain the external spiral shell of inclined laddertron with taper on the end periphery of the tube body
Line, contains the partially trapezoidal coupling inner thread with taper, the partially trapezoidal tube body with taper on the both ends inner headed face of the box cupling
External screw thread and the partially trapezoidal coupling inner thread interference fit with taper；The end of the inclined laddertron extracorporeal thread with taper
The first conical seal (contact) face is contained in portion, and the second conical seal (contact) face, institute are contained in the inner side of the partially trapezoidal coupling inner thread with taper
The first conical seal (contact) face is stated to be interference fitted with second conical seal (contact) face；Contain tube body clamping moment of torsion platform in the head of the tube body
Shoulder, the interior hole portion of the box cupling contain box cupling clamping torque shoulder, and the tube body clamping torque shoulder is turned round with the box cupling clamping
Square shoulder is engaged contact.
In one preferred embodiment of the utility model, first conical seal (contact) face and second conical seal (contact) face
Taper is identical.
In one preferred embodiment of the utility model, the inclined laddertron extracorporeal thread with taper and the band taper
Partially trapezoidal coupling inner thread taper it is identical.
In one preferred embodiment of the utility model, the taper is 1:16.
In one preferred embodiment of the utility model, the tooth of the partially trapezoidal coupling inner thread with taper is tall and big in institute
The tooth for stating the inclined laddertron extracorporeal thread with taper is high.
In one preferred embodiment of the utility model, described in the high ratio of tooth of the partially trapezoidal coupling inner thread with taper
The tall and big 0.15-0.30mm of tooth of inclined laddertron extracorporeal thread with taper.
In one preferred embodiment of the utility model, the inclined laddertron extracorporeal thread with taper and the band taper
Partially trapezoidal coupling inner thread engagement after, thread sealing grease is filled with backlash.
In one preferred embodiment of the utility model, the tube body clamping torque shoulder and the box cupling clamping moment of torsion platform
After shoulder is engaged contact, the diameter of the head end inner chamfer of the tube body is identical and seamless with the internal diameter of the middle part of the box cupling
Gap.
In one preferred embodiment of the utility model, the inclined laddertron extracorporeal thread with taper and the band taper
Partially trapezoidal coupling inner thread carrying angle be -3 °.
The beneficial effects of the utility model are：It is partially terraced by using the inclined laddertron extracorporeal thread with taper and with taper
Shape coupling inner thread is interference fitted, to improve the bonding strength of screw thread；Pass through the first conical seal (contact) face of tube body external screw thread front end
It is interference fitted with the second conical seal (contact) face on the inside of coupling inner thread, the sealing intensity of screw thread is improved with metallic sealing section；It is logical
The box cupling clamping torque shoulder for crossing hole portion in the tube body clamping torque shoulder and box cupling on tube body head coordinates contact, prevents outside tube body
Snapped through on occurring after screw thread and coupling inner thread engagement and turn round phenomenon damage screw thread, so as to play the role of torque resistant well.This reality
Turbulent flow phenomenon in fluid line can be reduced with new in oil/gas well gas production or oil recovery.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the helicitic texture of tubing and casing connection of the utility model；
Fig. 2 is the structure diagram of tube body shown in Fig. 1；
Fig. 3 is the structure diagram of box cupling shown in Fig. 1；
Fig. 4 is the schematic diagram of the inclined laddertron extracorporeal thread with taper shown in Fig. 1 and Fig. 2；
Fig. 5 is the schematic diagram of the partially trapezoidal coupling inner thread with taper shown in Fig. 1 and Fig. 3；
The mark of each component is as follows in attached drawing：1st, tube body, 2, the inclined laddertron extracorporeal thread with taper, 3, box cupling, 4, band
The partially trapezoidal coupling inner thread of taper, the 5, first conical seal (contact) face, the 6, second conical seal (contact) face, 7, tube body clamping torque shoulder,
8th, box cupling clamping torque shoulder.
Embodiment
The preferred embodiment to the utility model is described in detail below in conjunction with the accompanying drawings, so that the advantages of the utility model
It can be easier to be readily appreciated by one skilled in the art with feature, so as to make the scope of protection of the utility model apparent clear and definite
Define.
- Fig. 5 is please referred to Fig.1, the utility model embodiment includes：
A kind of helicitic texture of tubing and casing connection, including：Tube body 1 and box cupling 3；Contain on the end periphery of the tube body 1
There is the inclined laddertron extracorporeal thread 2 with taper, contain spiral shell in the partially trapezoidal box cupling with taper on the both ends inner headed face of the box cupling 3
Line 4, the inclined laddertron extracorporeal thread 2 with taper and the partially trapezoidal coupling inner thread 4 with taper are interference fitted, can
Improve the bonding strength of screw thread；Contain the first conical seal (contact) face 5, institute in the end of the inclined laddertron extracorporeal thread 2 with taper
Contain the second conical seal (contact) face 6, first conical seal (contact) face 5 and institute in the inner side for stating the partially trapezoidal coupling inner thread 4 with taper
The second conical seal (contact) face 6 is stated to be interference fitted；Tube body clamping torque shoulder 7 is contained on the head of the tube body 1, the box cupling 2 it is interior
Hole portion contains box cupling clamping torque shoulder 8, and the tube body clamping torque shoulder 7 is engaged with the box cupling clamping torque shoulder 8
Contact, improve connector anti-twisting property after being anchored to position in the use guarantee of clamping shoulder, avoided moment of torsion from damaging screw thread；Band taper
Inclined laddertron extracorporeal thread 2 and with taper partially trapezoidal coupling inner thread 4 engagement after, can prevent and snap through torsion phenomenon
And damage screw thread.
First conical seal (contact) face 5 is identical with the taper of second conical seal (contact) face 6, when the inclined laddertron with taper
After being anchored to position on extracorporeal thread 2 and partially trapezoidal coupling inner thread 4 with taper, sealing surface taper, which is originated to arch section, to be started to produce
Raw interference fit, forms the sealing surface of metal combination, reaches multi-sealed effect, the sealing means and biography that screw thread engages in itself
The sealing means of system are unchanged, the sealing means of extra increased metal-metal interference fit, metal-metal interference for wedge shape-
Wedge shape, according to the different interference fits of steel pipe and box cupling specification between 0.10mm~0.40mm, reaches metal-metal interference and matches somebody with somebody
The elastic packing of conjunction.
The taper phase of the inclined laddertron extracorporeal thread 2 with taper and the partially trapezoidal coupling inner thread 4 with taper
Together.The taper is 1:16, ensure to be threadedly coupled intensity in this way, detaining whole screw thread engagements on internal and external threads.
The carrying angle of the inclined laddertron extracorporeal thread with taper and the partially trapezoidal coupling inner thread with taper for-
3 °, guide angle is constant, and design advantage is the bonding strength for improving screw thread.
The tooth of the partially trapezoidal coupling inner thread 4 with taper is tall and big in the inclined laddertron extracorporeal thread 2 with taper
Tooth it is high.Tooth of the tooth height of the partially trapezoidal coupling inner thread 4 with taper than the inclined laddertron extracorporeal thread 2 with taper
Tall and big 0.15-0.30mm, ensures to occur without interference problem after detaining on internal and external threads.The inclined laddertron extracorporeal thread with taper
After 2 engage with the partially trapezoidal coupling inner thread 4 with taper, thread sealing grease is filled with backlash, improves anti-galling
Energy.Since the tooth of the inclined laddertron extracorporeal thread 2 with taper and the partially trapezoidal coupling inner thread 4 with taper is high different, nibbled
After closing button, between cog has gap, and filling thread sealing grease can improve sealing performance in gap.
It is described with taper after the tube body clamping torque shoulder 7 is engaged contact with the box cupling clamping torque shoulder 8
The inner chamfer diameter and 1 internal diameter of tube body of inclined laddertron extracorporeal thread 2 are consistent and smooth, the mid diameter of the box cupling 3 and
Pipe end inner chamfer is identical, and after ensureing that internal and external threads are at a fully engaged, inboard wall of tube body is contacted with box cupling interior walls be smooth, ensures that pipe series winding connects
Box cupling internal diameter is parallel with tube wall after going into the well, and reduces oil/gas well in gas production or oil recovery, turbulent flow phenomenon in fluid line.When outer
When power applies moment of torsion, torque resistant can be played the role of well,
The internal diameter of the middle part of the box cupling is identical and seamless.Oil/gas well can be reduced in gas production or oil recovery at the same time
When, the turbulent flow phenomenon in fluid line.
During installation, the inclined laddertron extracorporeal thread 2 with taper is engaged with the partially trapezoidal coupling inner thread 4 with taper
Button, the first conical seal (contact) face 5 and the second conical seal (contact) face 6 interference fit form metal combination sealing surface, and tube body clamping at this time
Torque shoulder 7 is completely attached to box cupling clamping torque shoulder 8, and produces the axial stress that increased dramatically, axial stress at this time
Feed back to loaded moment of torsion to increase sharply, when moment of torsion is reached in the range of nominal torque, stop loading torque wrench moment.Real-time
Under state, when external force applies moment of torsion, torque resistant can be played the role of well.On be buckled in position after, screw thread is fully connected, the head of tube body
Hold the diameter of inner chamfer consistent with the internal diameter of the middle part of box cupling, solve the problems, such as that pipe series winding connects the turbulent of rear oil gas flowing.
The utility model discloses a kind of helicitic texture of tubing and casing connection, external by using the inclined laddertron with taper
Screw thread and the partially trapezoidal coupling inner thread interference fit with taper, to improve the bonding strength of screw thread；Before tube body external screw thread
The second conical seal (contact) face interference fit on the inside of first conical seal (contact) face and coupling inner thread at end, is improved with metallic sealing section
The sealing intensity of screw thread；Matched somebody with somebody by the box cupling clamping torque shoulder of hole portion in the tube body clamping torque shoulder and box cupling on tube body head
Splice grafting touches, and prevents tube body external screw thread and coupling inner thread from snapping through on occurring after engaging and turn round phenomenon damage screw thread, so as to rise well
Acted on to torque resistant.The utility model can reduce turbulent flow phenomenon in fluid line in oil/gas well gas production or oil recovery.
, it is necessary to explanation, term " on ", " under ", "left", "right", " interior ", " outer " etc. in the description of the utility model
The orientation or position relationship of instruction be based on orientation shown in the drawings or position relationship, or the utility model product use when
The orientation or position relationship usually put, are for only for ease of description the utility model and simplify description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the utility model.The above descriptions are merely preferred embodiments of the present invention, and it is new to be not limited to this practicality
Type, for those skilled in the art, the present invention may have various modifications and changes.All essences in the utility model
God and principle within, any modification, equivalent replacement, improvement and so on, should be included in the scope of protection of the utility model it
It is interior.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in
Other related technical areas, are equally included in the patent within the scope of the utility model.
Claims (9)
- A kind of 1. helicitic texture of tubing and casing connection, it is characterised in that including：Tube body and box cupling；The end of the tube body is cylindrical Contain the inclined laddertron extracorporeal thread with taper on face, contain the partially trapezoidal box cupling with taper on the both ends inner headed face of the box cupling Internal thread, the inclined laddertron extracorporeal thread with taper and the partially trapezoidal coupling inner thread interference fit with taper；Institute The first conical seal (contact) face is contained in the end for stating the inclined laddertron extracorporeal thread with taper, spiral shell in the partially trapezoidal box cupling with taper The second conical seal (contact) face is contained in the inner side of line, and first conical seal (contact) face is interference fitted with second conical seal (contact) face；Institute Tube body clamping torque shoulder is contained on the head for stating tube body, and the interior hole portion of the box cupling contains box cupling clamping torque shoulder, the pipe Body clamping torque shoulder is engaged with the box cupling clamping torque shoulder and contacts.
- 2. the helicitic texture of tubing and casing according to claim 1 connection, it is characterised in that first conical seal (contact) face with The taper of second conical seal (contact) face is identical.
- 3. the helicitic texture of tubing and casing connection according to claim 1, it is characterised in that the inclined laddertron with taper Extracorporeal thread is identical with the taper of the partially trapezoidal coupling inner thread with taper.
- 4. the helicitic texture of tubing and casing connection according to claim 3, it is characterised in that the taper is 1:16.
- 5. the helicitic texture of tubing and casing according to claim 1 connection, it is characterised in that partially trapezoidal with taper connects The tall and big tooth in the inclined laddertron extracorporeal thread with taper of tooth for binding round internal thread is high.
- 6. the helicitic texture of tubing and casing according to claim 5 connection, it is characterised in that partially trapezoidal with taper connects The tooth height for binding round internal thread is taller and bigger 0.15-0.30mm than the tooth of the inclined laddertron extracorporeal thread with taper.
- 7. the helicitic texture connected according to any tubing and casing of claim 5 or 6, it is characterised in that described with taper After inclined laddertron extracorporeal thread is engaged with the partially trapezoidal coupling inner thread with taper, thread seal is filled with backlash Fat.
- 8. the helicitic texture of tubing and casing connection according to claim 1, it is characterised in that the tube body clamping torque shoulder After contact being engaged with the box cupling clamping torque shoulder, the diameter of the head end inner chamfer of the tube body and the centre of the box cupling The internal diameter at position is identical and seamless.
- 9. the helicitic texture of tubing and casing connection according to claim 1, it is characterised in that the inclined laddertron with taper The carrying angle of extracorporeal thread and the partially trapezoidal coupling inner thread with taper is -3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721312787.0U CN207245634U (en) | 2017-10-12 | 2017-10-12 | A kind of helicitic texture of tubing and casing connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721312787.0U CN207245634U (en) | 2017-10-12 | 2017-10-12 | A kind of helicitic texture of tubing and casing connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245634U true CN207245634U (en) | 2018-04-17 |
Family
ID=61890084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721312787.0U Active CN207245634U (en) | 2017-10-12 | 2017-10-12 | A kind of helicitic texture of tubing and casing connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207245634U (en) |
-
2017
- 2017-10-12 CN CN201721312787.0U patent/CN207245634U/en active Active
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