CN107762426B - A kind of anticorrosive Special threading connector - Google Patents
A kind of anticorrosive Special threading connector Download PDFInfo
- Publication number
- CN107762426B CN107762426B CN201711052864.8A CN201711052864A CN107762426B CN 107762426 B CN107762426 B CN 107762426B CN 201711052864 A CN201711052864 A CN 201711052864A CN 107762426 B CN107762426 B CN 107762426B
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- CN
- China
- Prior art keywords
- thread
- round
- buttress
- interior
- round thread
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/02—Equipment or details not covered by groups E21B15/00 - E21B40/00 in situ inhibition of corrosion in boreholes or wells
Abstract
The present invention provides a kind of anticorrosive Special threading connector, is engaged using two kinds of screw threads, and buttress thread engaged section plays tension and incompressible effect, and round thread engaged section plays sealing and prevents sealing surface by the effect corroded.Round thread middle line taper is greater than buttress thread middle line taper, connector round thread during upper button can be made to realize bigger radial interference amount, the sealing performance for being conducive to improve round thread, does not use torque shoulder to avoid the danger that conventional torque shoulder is easy to happen crevice corrosion.
Description
Technical field
The present invention relates to oil drilling, exploitation and production field, in particular to a kind of anticorrosive Special threading connector.
Background technique
Petroleum industry largely uses Special threading connector.
Common Special threading connector includes three parts: threaded portion, sealing position, torque shoulder.Threaded portion uses
Buttress thread or hook-shaped screw thread, mainly play drawing-resistant function；Using right angle or negative angle plane to top, main rise resists torque shoulder
Torque and anti-axial compression load effect, but connector when being stretched load to top surface separation after be easy to happen crevice corrosion,
And then corrosive medium enters the corrosion caused to sealing surface.It is not right at the wedge-shaped Varied pole piece Special threading connector shoulder of external import
Top can generate crevice corrosion during gas or liquid flowing, and then also influence sealing surface due to the presence of radial clearance.
Summary of the invention
To solve the deficiencies in the prior art, the purpose of the present invention is to provide a kind of anticorrosive Special threading connectors, solve
Existing nipple torque shoulder and the perishable problem of sealing surface improve nipple in a corrosive environment safe and reliable
Property.
In order to achieve the above objectives, the invention is realized by the following technical scheme:
A kind of anticorrosive Special threading connector, including the male connection and female adapter being assembled together, from interior spiral shell
Line joint head, which rises, is disposed with buttress thread engaged section, sealing surface and round thread in male connection and female adapter
Engaged section, round thread middle line taper are greater than buttress thread middle line taper, and anticorrosive Special threading connector is not provided with torque
Shoulder.
Further, the male connection includes outer buttress thread, sealing surface and the outer round thread set gradually；It is described
Female adapter includes interior buttress thread, sealing surface and the interior round thread set gradually；The buttress thread engaged section by
Outer buttress thread and the pairing of interior buttress thread, the round thread engaged section are matched by outer round thread and interior round thread.
Further, the anticorrosive Special threading connector buttress thread engaged section engages segment length than round thread.
Further, the taper of the buttress thread middle line is less than the taper of round thread middle line, and the two ratio is 0.3
~0.8.
Further, the outer buttress thread is identical with interior buttress thread shape, is buttress thread, hook-shaped screw thread
Or wedge thread；The outer round thread is identical with inner circle thread shape, is non-API round thread.
Further, the spiral shell of the thread pitch of the outer buttress thread, the thread pitch of interior buttress thread, outer round thread
The thread pitch of line screw pitch and interior round thread is all the same.
Further, the sealing surface is cylinder and ball face sealing, or is the conical surface and ball face sealing.
Further, the male connection sealing surface is cylinder or the conical surface, and the female adapter sealing surface is spherical surface.
Further, the male connection internal diameter is substantially flush with female adapter internal diameter.
The beneficial effects of the present invention are:
Anticorrosive Special threading connector of the invention using the engagement of two kinds of screw threads, buttress thread engaged section play tension and
Incompressible effect, round thread engaged section play sealing and prevent sealing surface by the effect corroded.Round thread middle line taper is big
In buttress thread middle line taper, connector round thread during upper button can be made to realize bigger radial interference amount, be conducive to
The sealing performance for improving round thread, does not use torque shoulder to avoid the danger that conventional torque shoulder is easy to happen crevice corrosion.
Detailed description of the invention
Fig. 1 is anticorrosive Special threading connector assembling schematic diagram
Fig. 2 is male connection schematic shapes
Fig. 3 is female adapter schematic shapes
Wherein: 1- male connection；2- female adapter；3- buttress thread middle line；4- round thread middle line；5- is close
Cover；The outer buttress thread of 6-；Buttress thread in 7-；The outer round thread of 8-；Round thread in 9-.
Specific embodiment
The present invention will be further described combined with specific embodiments below, the embodiment provided only for illustrating the present invention,
The range being not intended to be limiting of the invention.
As shown in Figure 1-3, anticorrosive Special threading connector of the invention includes the male connection 1 being assembled together and interior
Nipple 2, the male connection 1 include outer buttress thread 6, outer round thread 8 and sealing surface；The female adapter 2
Include interior buttress thread 7, interior round thread 9 and sealing surface；The not set torque shoulder of anticorrosive Special threading connector.
The anticorrosive Special threading connector includes buttress thread engaged section, round thread engaged section and sealing surface 5；It is described
Buttress thread engaged section is matched by outer buttress thread 6 and interior buttress thread 7, and the round thread engaged section is by outer round thread
8 and interior round thread 9 match；The anticorrosive Special threading connector buttress thread engaged section engages segment length than round thread.
The taper of the buttress thread middle line 3 be less than round thread middle line 4 taper, the two ratio be 0.3~
0.8。
The outer buttress thread 6 is identical with the shape of interior buttress thread 7, is buttress thread or hook-shaped screw thread,
It or is wedge thread；The outer round thread 8 is identical with the shape of interior round thread 9, is non-API round thread.
The thread pitch of the outer buttress thread 6, the thread pitch of interior buttress thread 7, outer round thread 8 screw thread spiral shell
Away from and interior round thread 9 thread pitch it is all the same.
The anticorrosive Special threading connector sealing surface 5 is cylinder/ball face sealing or the conical surface/ball face sealing.
1 sealing surface of male connection is cylinder or the conical surface, and 2 sealing surface of female adapter is spherical surface.
1 internal diameter of male connection is substantially flush with 2 internal diameter of female adapter.
As described above, embodiments of the present invention are described in detail, as long as but essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (1)
1. a kind of anticorrosive Special threading connector, it is characterised in that: including the male connection (1) being assembled together and internal screw thread
Connector (2) is disposed with partially trapezoidal spiral shell in male connection (1) and female adapter (2) from female adapter (2) head
Line engaged section, sealing surface and round thread engaged section, round thread middle line taper is greater than buttress thread middle line taper, anticorrosive
Special threading connector is not provided with torque shoulder；
The male connection (1) includes outer buttress thread (6), sealing surface (5) and the outer round thread (8) set gradually；Institute
Stating female adapter (2) includes interior buttress thread (7), sealing surface (5) and the interior round thread (9) set gradually；It is described partially terraced
Shape screw thread engaged section is matched by outer buttress thread (6) and interior buttress thread (7), and the round thread engaged section is by outer round thread
(8) it is matched with interior round thread (9)；The anticorrosive Special threading connector buttress thread engaged section engages segment length than round thread；
The taper of the buttress thread middle line (3) is less than the taper of round thread middle line (4), and the two ratio is 0.3~0.8；
The outer buttress thread (6) is identical with interior buttress thread (7) shape, be buttress thread, hook-shaped screw thread or
Wedge thread；The outer round thread (8) is identical with interior round thread (9) shape, is non-API round thread；The outer partially trapezoidal spiral shell
The thread pitch of line (6), the thread pitch of interior buttress thread (7), outer round thread (8) thread pitch and interior round thread (9)
Thread pitch it is all the same；The sealing surface (5) is cylinder and ball face sealing, or is the conical surface and ball face sealing；The outer spiral shell
Line connector (1) sealing surface is cylinder or the conical surface, and female adapter (2) sealing surface is spherical surface；In the male connection (1)
Diameter is substantially flush with female adapter (2) internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052864.8A CN107762426B (en) | 2017-10-30 | 2017-10-30 | A kind of anticorrosive Special threading connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711052864.8A CN107762426B (en) | 2017-10-30 | 2017-10-30 | A kind of anticorrosive Special threading connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107762426A CN107762426A (en) | 2018-03-06 |
| CN107762426B true CN107762426B (en) | 2019-09-03 |
Family
ID=61271081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711052864.8A Active CN107762426B (en) | 2017-10-30 | 2017-10-30 | A kind of anticorrosive Special threading connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107762426B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8029025B1 (en) * | 2005-07-28 | 2011-10-04 | Hydril Company | Single taper wedge thread connection with mid-seal |
| CN202611616U (en) * | 2012-05-28 | 2012-12-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-antitorque and high-seal threaded adapting connector |
| CN204152452U (en) * | 2014-07-21 | 2015-02-11 | 无锡西姆莱斯石油专用管制造有限公司 | High antitorque high sealability variable buckle nipple |
| CN104812989A (en) * | 2012-09-21 | 2015-07-29 | 瓦卢瑞克石油天然气法国有限公司 | Tubular threaded connection |
| CN105401891A (en) * | 2015-12-16 | 2016-03-16 | 天津钢管集团股份有限公司 | Double-stage thread air-tight seal special thread joint structure for casing pipe |
-
2017
- 2017-10-30 CN CN201711052864.8A patent/CN107762426B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8029025B1 (en) * | 2005-07-28 | 2011-10-04 | Hydril Company | Single taper wedge thread connection with mid-seal |
| CN202611616U (en) * | 2012-05-28 | 2012-12-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-antitorque and high-seal threaded adapting connector |
| CN104812989A (en) * | 2012-09-21 | 2015-07-29 | 瓦卢瑞克石油天然气法国有限公司 | Tubular threaded connection |
| CN204152452U (en) * | 2014-07-21 | 2015-02-11 | 无锡西姆莱斯石油专用管制造有限公司 | High antitorque high sealability variable buckle nipple |
| CN105401891A (en) * | 2015-12-16 | 2016-03-16 | 天津钢管集团股份有限公司 | Double-stage thread air-tight seal special thread joint structure for casing pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107762426A (en) | 2018-03-06 |
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