CN204877302U - Screwed joint with seal structure - Google Patents
Screwed joint with seal structure Download PDFInfo
- Publication number
- CN204877302U CN204877302U CN201520405707.0U CN201520405707U CN204877302U CN 204877302 U CN204877302 U CN 204877302U CN 201520405707 U CN201520405707 U CN 201520405707U CN 204877302 U CN204877302 U CN 204877302U
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- China
- Prior art keywords
- plane
- seal structure
- hermetically
- sealed construction
- nipple
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Abstract
The utility model provides a screwed joint with seal structure, it is equipped with the helicitic texture and is located the seal structure of the helicitic texture left and right sides, the helicitic texture is equipped with a plurality of transverse arrangement's screw thread, the screw thread includes the loading end and is located the spigot surface on loading end right side, contained angle between loading end and the vertical plane is 15 degrees, contained angle between spigot surface and the vertical plane is 45 degrees, seal structure includes the inside seal structure who is located left outside seal structure and is located the right side, outside seal structure includes first inclined plane and second inclined plane, contained angle between first inclined plane and the vertical plane is 15 degrees, contained angle between second inclined plane and the vertical plane is 45 degrees, inside seal structure includes the third inclined plane. The utility model discloses sealing performance is good, and it adopts outside seal and inner sealing mutual independence to carry out work to keep good leakproofness to annular space and wellhole pressure, multiple sealed design make its the body is specified burst and sink under, ensure 100% airtight integrality.
Description
Technical field
The utility model relates to thread technology field, particularly relates to a kind of nipple with hermetically-sealed construction.
Background technology
Oil, sleeve pipe are requisite a kind of oil country tubular goods in oil and natural gas exploitation, up to a hundred even hundreds of root oil, sleeve pipe is threaded connection formation oil, casing string, wherein connecting thread is link the weakest in whole tubing string.
Along with oil, gas well drilling condition day by day harsh, the short round thread of API5B of standard, the oval screw thread of APILC and APIBC buttress thread have been difficult to meet existing instructions for use.API standard round screw thread has good seal performance, the feature that interchangeability is good, but bonding strength is low.Although API buttress thread bonding strength is good, due to tooth-shape structure design problem, cause its poor sealing performance.API screw thread not only will bear linkage function, and will bear sealing function.Concerning API nipple, no matter be round thread form or buttress thread form, both made the machining tolerance of joint for leveling off to zero, after joint is tightened, all can produce certain fit clearance between internal and external screw thread, this gap in the shape of a spiral, the interior or exterior space of sleeve pipe can be communicated with, form the leakage path of fluid, only reliable thread compound is filled, and API screw thread just can play sealing function.But it is rotten that thread compound is easy to volatilization, especially when downhole temperature is higher, volatilize and go bad faster, the at this moment effect of its blocking leakage path significantly declines, and when the pressure of joint inner fluid especially gas is higher, API joint is easy to leakage accident occurs.
Summary of the invention
The utility model, for the deficiencies in the prior art, provides a kind of nipple with hermetically-sealed construction that can effectively solve the problems of the technologies described above.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of nipple with hermetically-sealed construction, it is for being connected with body, the described nipple with hermetically-sealed construction is provided with helicitic texture and is positioned at the hermetically-sealed construction of the described helicitic texture left and right sides, described helicitic texture is provided with some transversely arranged screw threads, described screw thread comprises bearing surface and is positioned at the spigot surface on the right side of described bearing surface, angle between described bearing surface and perpendicular is 15 degree, angle between described spigot surface and described perpendicular is 45 degree, described hermetically-sealed construction comprises the outer seal structure being positioned at left side and the internal seal structure being positioned at right side, described outer seal structure comprises the first inclined-plane and is positioned at the second inclined-plane of described first chamfered inside, angle between described first inclined-plane and perpendicular is 15 degree, angle between described second inclined-plane and perpendicular is 45 degree, described internal seal structure comprises the 3rd inclined-plane.
Horizontal plane is provided with between described bearing surface and described spigot surface.
Described bearing surface tilts to the left, and described spigot surface tilts to the left.
Described first inclined-plane is in skewed to the right.
Described second inclined-plane tilts to the right.
Described 3rd inclined-plane in the right and inner inclination, the inner surface close contact of described 3rd inclined-plane and body.
Beneficial effect: compared with prior art, it has following beneficial effect to the utility model:
The utility model has the nipple favorable sealing property of hermetically-sealed construction, it adopts outside seal and inner sealing is separate carries out work, to keep good sealing to annular space and wellbore pressure, multi-sealed design makes it at body Rated Burst with under subsiding, and guarantees the airtight integrity of 100%.Simultaneously in order to provide best intensity, screw thread bearing surface has the dihedral of 15 degree, and to place play, screw thread spigot surface has the angle of 45 degree with so that quick clog-free upper button, and this designs has excellent anti-bending strength in this type of connection.External diameter is concordant with internal diameter 100%, and internal diameter is taper, and level and smooth without groove, can efficiently dredge, external diameter has strict tolerance, exquisite workmanship.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to technological means of the present utility model can be better understood, and can be implemented according to the content of manual, and can become apparent to allow above and other object of the present utility model, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the screw thread schematic diagram that the utility model has the nipple of hermetically-sealed construction;
Fig. 2 has the structural representation of the helicitic texture of hermetically-sealed construction for the utility model shown in Fig. 1.
Detailed description of the invention
As shown in Figure 1, the utility model has the nipple 6 of hermetically-sealed construction, and it is for being connected with body 7, described in there is hermetically-sealed construction nipple 6 be provided with helicitic texture and be positioned at the hermetically-sealed construction of the described helicitic texture left and right sides.
As shown in Figures 1 and 2, described helicitic texture is provided with some transversely arranged screw threads, and described screw thread comprises bearing surface 1 and is positioned at the spigot surface 2 on the right side of described bearing surface 1.Horizontal plane is provided with between described bearing surface 1 and described spigot surface 2.Described bearing surface 1 is in skewed, and described bearing surface 1 tilts to the left, and the angle b between described bearing surface 1 and perpendicular is 15 degree, thus can prevent helicitic texture play.Described spigot surface 2 is in skewed, described spigot surface 2 tilts to the left, angle a between described spigot surface 2 and described perpendicular is 45 degree, thus can quick, trouble-free wound, and above-mentioned design can be that joint has excellent anti-bending strength and sealing effectiveness in this connection.
As shown in Figures 1 and 2, described hermetically-sealed construction comprises the outer seal structure being positioned at left side and the internal seal structure being positioned at right side.Described outer seal structure comprises the first inclined-plane 3 and is positioned at the second inclined-plane 4 inside described first inclined-plane 3.Described first inclined-plane 3 is in skewed to the right, and the angle between described first inclined-plane 3 and perpendicular is 15 degree.Described second inclined-plane 4 is in skewed, described second inclined-plane 4 tilts to the right, angle between described second inclined-plane 4 and perpendicular is 45 degree, described first inclined-plane 3 cooperatively interacts with described second inclined-plane 4 and has good sealing effectiveness, it uses taper to cone-shaped seal structure, the timely use long period, it still has good sealing effectiveness.Described internal seal structure comprises the 3rd inclined-plane 5, and described 3rd inclined-plane 5 is in the right and inner inclination, and the inner surface close contact of described 3rd inclined-plane and body 7, has good sealing effectiveness.
Embodiment recited above is only be described preferred embodiment of the present utility model, not limits design of the present utility model and scope.Under the prerequisite not departing from the utility model design concept; the various modification that this area ordinary person makes the technical solution of the utility model and improvement; protection domain of the present utility model all should be dropped into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (6)
1. one kind has the nipple of hermetically-sealed construction, it is for being connected with body, it is characterized in that: described in there is hermetically-sealed construction nipple be provided with helicitic texture and be positioned at the hermetically-sealed construction of the described helicitic texture left and right sides, described helicitic texture is provided with some transversely arranged screw threads, described screw thread comprises bearing surface and is positioned at the spigot surface on the right side of described bearing surface, angle between described bearing surface and perpendicular is 15 degree, angle between described spigot surface and described perpendicular is 45 degree, described hermetically-sealed construction comprises the outer seal structure being positioned at left side and the internal seal structure being positioned at right side, described outer seal structure comprises the first inclined-plane and is positioned at the second inclined-plane of described first chamfered inside, angle between described first inclined-plane and perpendicular is 15 degree, angle between described second inclined-plane and perpendicular is 45 degree, described internal seal structure comprises the 3rd inclined-plane.
2. the nipple with hermetically-sealed construction according to claim 1, is characterized in that: be provided with horizontal plane between described bearing surface and described spigot surface.
3. the nipple with hermetically-sealed construction according to claim 2, it is characterized in that: described bearing surface tilts to the left, described spigot surface tilts to the left.
4. the nipple with hermetically-sealed construction according to claim 3, is characterized in that: described first inclined-plane is in skewed to the right.
5. the nipple with hermetically-sealed construction according to claim 4, is characterized in that: described second inclined-plane tilts to the right.
6. the nipple with hermetically-sealed construction according to claim 5, is characterized in that: described 3rd inclined-plane in the right and inner inclination, the inner surface close contact of described 3rd inclined-plane and body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520405707.0U CN204877302U (en) | 2015-06-14 | 2015-06-14 | Screwed joint with seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520405707.0U CN204877302U (en) | 2015-06-14 | 2015-06-14 | Screwed joint with seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204877302U true CN204877302U (en) | 2015-12-16 |
Family
ID=54821685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520405707.0U Expired - Fee Related CN204877302U (en) | 2015-06-14 | 2015-06-14 | Screwed joint with seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204877302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273655A (en) * | 2019-07-26 | 2019-09-24 | 西南石油大学 | A kind of novel direct-connected retaining ring pipe screw thread structure |
-
2015
- 2015-06-14 CN CN201520405707.0U patent/CN204877302U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273655A (en) * | 2019-07-26 | 2019-09-24 | 西南石油大学 | A kind of novel direct-connected retaining ring pipe screw thread structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20210614 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |