CN208502683U - A kind of special thread buckle joint - Google Patents
A kind of special thread buckle joint Download PDFInfo
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- CN208502683U CN208502683U CN201820507101.1U CN201820507101U CN208502683U CN 208502683 U CN208502683 U CN 208502683U CN 201820507101 U CN201820507101 U CN 201820507101U CN 208502683 U CN208502683 U CN 208502683U
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- conical surface
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- female
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- 238000007789 sealing Methods 0.000 claims abstract description 49
- 230000007704 transition Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 210000002445 nipple Anatomy 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The utility model is a kind of special thread buckle joint, and including female thread and pin thread with metal-contacting surface, metal-contacting surface includes threaded portions contact and the contact of non-threaded place.Threaded portions contact includes that female thread internal screw thread tooth top contacts and the carrying face contact of internal and external screw thread tooth with pin thread external screw thread tooth bottom.Non-threaded place's contact includes the first taper-face contact of internal and external screw thread sealing face contact and internal and external screw thread and the step face contact of internal and external screw thread.After nipple is tightened, internal and external threads sealing surface forms interference fit, plays sealing function.In the utility model, it is separated by a distance by improved screw thread dental structure and sealing surface position and step surface, compared with prior art, the high bonding strength of the utility model collection, high incompressible, high torque resistant, high bending and high temperature resistance contour can be in one, and facilitate live practical operation, reduce the improper production time of Party A company.
Description
Technical field
It is a kind of modified buttress thread and sealing surface position the utility model relates to a kind of special thread buckle joint
The high-performance special thread buckle joint separated by a distance with step surface, it is suitable for oil and gas industries especially to tubing
Connector comprehensive performance requires in higher oil/gas well.
Background technique
In recent years, as the exploitation difficulty of conventional oil gas well is increasing and the increase year by year of unconventional oil and gas yield,
And the test mining of the energy such as hot lava well and combustible ice, thus the comprehensive performance of tube connector is required higher and higher.
Existing API (American Petroleum Institute) nipple and other various Premium connections can only all meet one of them
Or a few high-performance, such as high tensile, height is incompressible or has high tensile simultaneously, and height is antitorque etc., this also allows for oil gas
Well casing material manufacturing company requires to need to design different joint structures for scene is different.Therefore it is badly in need of developing a kind of to expire simultaneously
Sufficient high tensile, high incompressible, high antitorque, high bending, high temperature resistance contour can be in the special thread buckle joint of one.
The gas industries downturn period of recent years, current various Premium connections application stage at the scene, since design is tied
The reason of structure, sealing cone are often damaged by external hard substance, and during make-up, since eccentric thread alternating causes upper
Thread is worn in button rundown process.Therefore a kind of new special thread snapping header structure need to be designed, is avoided as far as possible existing
The field application stage goes wrong and increases the improper operation time of oil-gas exploration exploitation company.
Utility model content
The purpose of the utility model is to provide a kind of special thread buckle joints, are provided simultaneously with high tensile, high incompressible, highly resistance
Turn round, high bending, high temperature resistance contour can in one special thread buckle joint, and be convenient for execute-in-place, reduce product by
Increase the improper operation time of Party A company to damage.
To achieve the above object, the technical solution of the utility model is:
A kind of special thread buckle joint, including female thread and pin thread, female thread structure include internal thread segment and non-threaded section, pin thread
Structure includes external thread section and non-threaded section；It is characterized in that female thread internal thread segment screw thread dental structure is buttress thread tooth, it is non-
Thread segment includes sealing cone, first conical surface and second conical surface and interior step surface, and non-threaded section passes through between internal thread segment
Cylindrical surface rounding off；Pass through fillet slot rounding off between step surface and non-threaded section；
The female thread internal thread segment thread includes tooth top, bottom of the tooth, guide surface and loading end, and the tooth top, bottom of the tooth are flat
Row is in body central axis, the loading end angle φ2It is 1 ° -4 °, the guide surface angle φ1It is 10 ° -15 °, described
Guide surface is machined with 20 ° -40 ° of chamfering φ；
Pin thread external thread section screw thread dental structure is buttress thread tooth, and non-threaded section includes sealing cone, second conical surface, the
One conical surface and step surface.
The female thread internal thread segment screw thread is adapted with the pin thread external thread section screw thread, and the pin thread is spirally connected completely to be inserted in
After the female thread, first conical surface of female thread and the first taper-face contact of pin thread, female thread sealing cone (5) are contacted with pin thread sealing cone；
The pin thread external thread section thread includes tooth top, bottom of the tooth, guide surface and loading end, and the tooth top, bottom of the tooth are flat
Row is in body central axis, the loading end angle φ4It is 1 ° -4 °, the guide surface angle φ3It is 10 ° -15 °.
The thread taper of the female thread internal thread segment and the pin thread external thread section (III) is 1；20-1:17.
Thread number is per inch 4-6 tooth.
The sealing cone taper angle theta of non-threaded section of the female thread1It is 7 ° -15 °, the taper angle theta of second conical surface3For 1.43 °-
1.79 °, the cone angle beta of first conical surface1It is 15 ° -25 °, the cylindrical surface wall thickness T between thread segment and non-threaded section1More than or equal to interior spiral shell
Line section screw thread terminates screw thread tooth root to the thickness T of outer wall2；
The sealing cone taper angle theta of non-threaded section of the pin thread2It is 7 ° -15 °, the taper angle theta of second conical surface4For 1.43 °-
1.79 °, the cone angle beta of first conical surface2It is 15 ° -25 °；Step surface angle [alpha]2In 0 ° -15 ° of opposing angular, step surface to sealing cone
The distance between L2For 8-14mm.
The radius of corner of transition circle chamfered groove is 0.6-1.0mm between step surface and non-threaded section in the female thread；Interior step
Face angle [alpha]1In 0 ° -15 ° of opposing angular, the distance between interior step surface to sealing cone L1For 10-15mm.
The pin thread sealing cone is in screw thread the first tooth contact point and first conical surface (11), the second conical surface interface point
The lower section of b line H, vertical range h are less than 1.2mm.
The skewed slot total surface area that the pin thread is processed on first conical surface is less than first conical surface surface area
30%, the skewed slot total surface area processed on the step surface is less than the 30% of the step surface surface area.
The pin thread is spirally connected completely be inserted in the female thread after, first conical surface of female thread and first taper-face contact of pin thread
Magnitude of interference 0.35-1.2mm, the female thread sealing cone and pin thread sealing cone contact magnitude of interference are 0.33-1.14mm.
Utility model has the advantages that being that a kind of modified buttress thread and sealing surface position are separated by with step surface
The high-performance special thread buckle joint of certain distance, by the change to screw thread dental structure improvement and sealing cone position, and
The difference of the contact magnitude of interference and sealing cone magnitude of interference of first conical surface reaches collection high tensile, high incompressible, high antitorque, highly resistance
Bending, high temperature resistance contour can be in the purpose of utility model of one, and facilitates live practical operation, reduces product in the operation phase
Between damage by external factor, advantageously reduce the improper operation time of oil-gas exploration exploitation company.
Detailed description of the invention
The fit structure schematic diagram of female thread A and pin thread B in Fig. 1 the utility model；
The structural schematic diagram of female thread A in Fig. 2 the utility model；
Non-threaded section of female thread A of enlarged structure schematic diagram in Fig. 3 the utility model；
The enlarged structure schematic diagram of female thread A internal thread segment in Fig. 4 the utility model；
The structural schematic diagram of pin thread B in Fig. 5 the utility model；
Non-threaded section of pin thread B of enlarged structure schematic diagram in Fig. 6 the utility model；
The enlarged structure schematic diagram of pin thread B external thread section in Fig. 7 the utility model；
The structural schematic diagram of non-threaded section of groove of pin thread B in Fig. 8 the utility model.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
A kind of special thread buckle joint, such as Fig. 1, including female thread A and pin thread B involved in the utility model, such as Fig. 2 are female
Detaining A structure includes internal thread segment II and non-threaded section of I, is buttress thread tooth in II screw thread dental structure of female thread A internal thread segment, non-
Thread segment I includes sealing cone 5, first conical surface 3 and second conical surface 4 and interior step surface 1, non-threaded section of I and internal thread segment II
Between pass through 21 rounding off of cylindrical surface；It is first conical surface by 2 rounding off of fillet slot between step surface and non-threaded section of I
Plastic deformation occurs, space is provided, connector holds the compound load of load and axial high pressure in receiving high temperature or high pressure or even high temperature
When under lotus effect, increase entire compression contracting and the high temperature resistant property of connector.
Such as Fig. 5, pin thread B structure includes external thread section III and non-threaded section IV, in III screw thread dental structure of pin thread B external thread section
It is buttress thread tooth, non-threaded section IV includes sealing cone 13, second conical surface 12, first conical surface 11 and step surface 10.
Pin thread B and female thread A are both provided with second conical surface, increase sealing surface at a distance from step surface, can be reduced external hard
Substance is encountered a possibility that sealing surface, while guaranteeing after box and pin is tightened, and keeps the radial stress generated when step face contact equal
Even distribution improves the bending resistance of connector.
Such as Fig. 1, II screw thread of female thread internal thread segment is adapted with III screw thread of pin thread B external thread section, practical operation
In, pin thread B is first inserted in female thread A by make-up device, 2 circle left and right are first screwed in using the slow-speed of revolution after hitch, it is then every using 15 circles
The revolving speed of or so minute screws in until when last 1-2 is enclosed, and is further threaded into revolving speed per minute is enclosed lower than 5 to predetermined position；
After the pin thread B is spirally connected completely is inserted in the female thread A, first conical surface of female thread A 3 is contacted with first conical surface of pin thread B 11, female thread A
Sealing cone 5 is contacted with pin thread B sealing cone 13；Wherein, first conical surface of female thread A 3 connects with first conical surface of pin thread B 11
Magnitude of interference 0.35-1.2mm is touched, the female thread A sealing cone 5 is 0.33- with the pin thread B sealing cone 13 contact magnitude of interference
1.14mm, in practice, since the outer tube diameter size range of screw thread buckle joint is 127mm-355.6mm, different contact interference
Metering pin is to different outer tube diameter sizes.The contact magnitude of interference of first conical surface is greater than the contact magnitude of interference of sealing surface, so that connector
When bearing high temperature and axial high compression loads, the first conical surface elder generation sealing surface is plastically deformed, to improve the anti-of connector
High temperature and anti-compression properties.
Such as Fig. 4, II thread of female thread A internal thread segment includes tooth top 7, bottom of the tooth 9, guide surface 8 and loading end 6, institute
State tooth top 7, bottom of the tooth 9 is parallel to body central axis, increase the anti-compression properties of connector.6 angle φ of loading end2For
1 ° -4 °, preferred angle is 3 °, 8 angle φ of guide surface1It is 10 ° -15 °, preferred angle is 12 °, in the guiding
Face 8 has 20 ° -40 ° of chamfering φ, and preferred angle is 30 °, makes connector will not thread alternating during make-up；Thread taper is 1；
20-1:17, preferred taper are 1:17.5, and thread number is per inch 4-6 tooth.
Such as Fig. 6, III thread of pin thread B external thread section includes tooth top 19, bottom of the tooth 17, guide surface 18 and loading end
16, the tooth top 19, bottom of the tooth 17 are parallel to body central axis, 16 angle φ of loading end4It is 1 ° -4 °, preferred angle
It is 3 °, 18 angle φ of guide surface3It is 10 ° -15 °, preferred angle is 12 °, and thread taper is 1；20-1:17, it is excellent
The taper of choosing is 1:17.5, and thread number is per inch 4-6 tooth.
Such as Fig. 3,5 taper angle theta of sealing cone of the non-threaded section of I of female thread A1It is 7 ° -15 °, different cone angles is for difference
Tube body wall thickness, the taper angle theta of second conical surface 43It is 1.43 ° -1.79 °, the cone angle beta of first conical surface 31It is 15 ° -25 °, preferred angle
Degree is 20 °, the 21 wall thickness T of cylindrical surface between thread segment II and non-threaded section of I1Terminate thread more than or equal to internal thread segment screw thread
Thickness T of the tooth root to outer wall2, it is preferred that internal thread segment screw thread terminates screw thread tooth root to the thickness T of outer wall2Less times greater than tube body
Wall thickness T.
The angle γ of line is 30 ° -45 ° between sealing cone 5 and cylindrical surface 21, which is internal thread segment II
With the connection space of non-threaded section of I, exiting for screwer provides space when being machining internal thread, and screwer is avoided to encounter sealed taper
Face.Simultaneously guarantee internal thread segment screw thread terminate locate screw thread tooth root to outer wall thickness less times greater than tube body wall thickness T, to guarantee
The tensile strength of the connector is greater than the tensile strength of tube body.
The radius of corner of transition circle chamfered groove 2 is 0.6-1.0mm between step surface 1 and non-threaded section of I in the female thread A；More
Preferred radius of corner is 0.9mm, is conducive to select suitable tool sharpening, guarantees the fillet slot and the round and smooth mistake of interior step surface
It crosses；Interior 1 angle [alpha] of step surface1In 0 ° -15 ° of opposing angular, pass through the round and smooth mistake of fillet slot 2 between interior step surface 1 and first conical surface 3
Cross connection, the effect of the fillet slot 2 be when connector bears compression or when high temperature load, be 10 ° -30 ° of first conical surface 3 by
To excessive load, the yield deformation generated and the deformation of creep provide space；Also increase by one between interior step surface 1 and sealing cone 5
Section second conical surface, 4 (taper angle theta3It is 1.43 ° -1.79 °) structure, form standoff distance between interior step surface 1 and sealing cone 5
L110-15mm.
Such as Fig. 7,13 taper angle theta of sealing cone of non-threaded section IV of the pin thread B2It is 7 ° -15 °, different cone angles is not for
Same tube body wall thickness, the taper angle theta of second conical surface 124It is 1.43 ° -1.79 °, the cone angle beta of first conical surface 11215 ° -25 °, preferably
Angle is 20 °；10 angle [alpha] of step surface2In 0 ° -15 ° of opposing angular, step surface 10 arrives the distance between sealing cone 13 L2For 8-
14mm；It is concordant with female thread inner hole 20 in the inner hole 14 that port bores, avoid tube fluid from forming turbulent flow at this.Inner hole 14 and pipe
Internal wall smooth transition 15.
The pin thread B sealing cone 13 is in the first tooth of screw thread contact point a and first conical surface 11, second conical surface 12 are handed over
The lower section of contact b line H, vertical range h are less than 1.2mm.
Compared with prior art, the utility model by screw thread dental structure improve and sealing cone position change, with
And first the conical surface contact magnitude of interference and sealing cone magnitude of interference difference, reach collection high tensile, high incompressible, high antitorque, height
Counter-bending, high temperature resistance contour can be in the purpose of utility model of one, with identical material (grade of steel P110), identical size (tube body
Outer diameter 177.8mm, internal diameter of tube body 157.08mm) comparison, resistance to compression raising 30%, bendability improves 32%, high temperature resistant property
40% is improved, highest can tolerate temperature up to 220 DEG C, and torque wrench moment improves nearly 3400N.M.
Such as Fig. 8, a few road skewed slots are processed on first, second conical surface and step surface of the pin thread B respectively, effect is when existing
After field operator smears excessive dope, be conducive to squeeze out excessive dope during upper button.On first conical surface 11
The skewed slot 11-1 total surface area of processing is less than the 30% of first conical surface, 11 surface area, and skewed slot quantity 2-4 is a；The step
The skewed slot 10-1 total surface area processed on face 10 is less than the 30% of 10 surface area of step surface, and skewed slot quantity 2-4 is a.If
Skewed slot surface area is excessive, then will affect the incompressible and torsional property of the special thread buckle joint.The effect of the skewed slot simultaneously
It is to guarantee that connector is tightened the space formed between later second conical surface of box and pin and kept unimpeded with tube body inner hole.
In summary it is only the preferred embodiment of the utility model, not is used to limit the implementation model of the utility model
It encloses.Equivalent changes and modifications made by i.e. all contents according to present utility model application the scope of the patents, all should be the utility model
Technology scope.
Claims (8)
1. a kind of special thread buckle joint, including female thread (A) and pin thread (B), female thread (A) structure includes internal thread segment (II) and non-
Thread segment (I), pin thread (B) structure include external thread section (III) and non-threaded section (IV)；It is characterized in that female thread (A) internal thread segment
(II) screw thread dental structure is buttress thread tooth, and non-threaded section (I) includes sealing cone (5), first conical surface (3) and the second cone
Face (4) and interior step surface (1) pass through cylindrical surface (21) rounding off between non-threaded section (I) and internal thread segment (II)；Step surface
Pass through fillet slot (2) rounding off between non-threaded section (I)；
Female thread (A) internal thread segment (II) thread includes tooth top (7), bottom of the tooth (9), guide surface (8) and loading end (6),
The tooth top (7), bottom of the tooth (9) are parallel to body central axis, loading end (6) angle φ2It is 1 ° -4 °, the guide surface
(8) angle φ1It is 10 ° -15 °, is machined with 20 ° -40 ° of chamfering φ in the guide surface (8)；
Pin thread (B) external thread section (III) screw thread dental structure is buttress thread tooth, non-threaded section (IV) comprising sealing cone (13),
Second conical surface (12), first conical surface (11) and step surface (10)；
Female thread (A) internal thread segment (II) screw thread is adapted with the pin thread (B) external thread section (III) screw thread, the pin thread
(B) it is spirally connected completely after being inserted in the female thread (A), first conical surface of female thread (A) (3) is contacted with first conical surface of pin thread (B) (11), female thread
(A) sealing cone (5) is contacted with pin thread (B) sealing cone (13)；
Pin thread (B) external thread section (III) thread includes tooth top (19), bottom of the tooth (17), guide surface (18) and loading end
(16), the tooth top (19), bottom of the tooth (17) are parallel to body central axis, loading end (16) angle φ4It is 1 ° -4 °, institute
State guide surface (18) angle φ3It is 10 ° -15 °.
2. special thread buckle joint as described in claim 1, it is characterised in that: female thread (A) internal thread segment (II) and institute
The thread taper for stating pin thread (B) external thread section (III) is 1；20-1:17.
3. special thread buckle joint as claimed in claim 2, it is characterised in that: thread number is per inch 4-6 tooth.
4. special thread buckle joint as described in claim 1, it is characterised in that: non-threaded section of the female thread (A) (I) it is close
Seal the conical surface (5) taper angle theta1It is 7 ° -15 °, the taper angle theta of second conical surface (4)3It is 1.43 ° -1.79 °, the cone angle beta of first conical surface (3)1For
15 ° -25 °, cylindrical surface (21) wall thickness T between thread segment (II) and non-threaded section (I)1Terminate more than or equal to internal thread segment screw thread
Thickness T of the screw thread tooth root to outer wall2；
Sealing cone (13) taper angle theta of the pin thread (B) non-threaded section (IV)2It is 7 ° -15 °, the taper angle theta of second conical surface (12)4For
1.43 ° -1.79 °, the cone angle beta of first conical surface (11)2It is 15 ° -25 °；Step surface (10) angle [alpha]2In 0 ° -15 ° of opposing angular, platform
Terrace is to the distance between sealing cone L2For 8-14mm.
5. special thread buckle joint as described in claim 1, it is characterised in that: the interior step surface of the female thread (A) (1) and non-spiral shell
The radius of corner of transition circle chamfered groove (2) is 0.6-1.0mm between line section (I)；Interior step surface (1) angle [alpha]1In opposing angular
0 ° -15 °, the distance between interior step surface (1) to sealing cone (5) L1For 10-15mm.
6. special thread buckle joint as described in claim 1, it is characterised in that: pin thread (B) sealing cone (13) is in
The lower section of the first tooth contact point (a) of screw thread and first conical surface (11), second conical surface (12) interface point b line H, vertical range
H is less than 1.2mm.
7. special thread buckle joint as claimed in claim 6, it is characterised in that: the pin thread (B) is in first conical surface
(11) skewed slot (11-1) total surface area processed on is less than the 30% of first conical surface (11) surface area, the step surface (10)
Skewed slot (10-1) total surface area of upper processing is less than the 30% of the step surface (10) surface area.
8. special thread buckle joint as described in claim 1, it is characterised in that: the pin thread (B) be spirally connected completely be inserted in it is described
After female thread (A), first conical surface of female thread (A) (3) and the pin thread (B) first conical surface (11) contact magnitude of interference 0.35-
1.2mm, female thread (A) sealing cone (5) and the pin thread (B) sealing cone (13) contact magnitude of interference are 0.33-
1.14mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820507101.1U CN208502683U (en) | 2018-04-11 | 2018-04-11 | A kind of special thread buckle joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820507101.1U CN208502683U (en) | 2018-04-11 | 2018-04-11 | A kind of special thread buckle joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208502683U true CN208502683U (en) | 2019-02-15 |
Family
ID=65295377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820507101.1U Withdrawn - After Issue CN208502683U (en) | 2018-04-11 | 2018-04-11 | A kind of special thread buckle joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208502683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301786A (en) * | 2018-04-11 | 2018-07-20 | 张祖林 | A kind of special thread buckle joint |
-
2018
- 2018-04-11 CN CN201820507101.1U patent/CN208502683U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108301786A (en) * | 2018-04-11 | 2018-07-20 | 张祖林 | A kind of special thread buckle joint |
| CN108301786B (en) * | 2018-04-11 | 2024-04-19 | 张祖林 | Special thread-locking joint |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190215 Effective date of abandoning: 20240419 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190215 Effective date of abandoning: 20240419 |