CN109736724A - Aluminium alloy tubing and casing air-sealed special threaded joint structure - Google Patents
Aluminium alloy tubing and casing air-sealed special threaded joint structure Download PDFInfo
- Publication number
- CN109736724A CN109736724A CN201910118928.2A CN201910118928A CN109736724A CN 109736724 A CN109736724 A CN 109736724A CN 201910118928 A CN201910118928 A CN 201910118928A CN 109736724 A CN109736724 A CN 109736724A
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- Prior art keywords
- male
- female end
- female
- aluminium alloy
- screw thread
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 45
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 239000000956 alloy Substances 0.000 claims description 18
- 210000002445 nipple Anatomy 0.000 claims description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 230000008719 thickening Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Abstract
The present invention provides a kind of aluminium alloy tubing and casing air-sealed special threaded joint structures, including the male end part in tube end maching and the female end part in tube end maching, male end has with tapered male thread, inner sealing surface and outer to roof platform shoulder, and female end has the box thread with taper, inner sealing surface and interior to roof platform shoulder；Pipe end is through upset or not upset processing, to roof platform shoulder first to jacking up sealing function in male end end face and female end, female end outer end face and male end it is outer after positioning action is arrived to jacking up to roof platform shoulder；Male end helicitic texture length and female end helicitic texture length meet formula calculated value simultaneously.The beneficial effects of the present invention are: using successively to the hermetic seal ability and anti-torsion ability excessively that can effectively improve product inside and outside top to roof construction；Male end helicitic texture length and female end helicitic texture length are calculated using formula, guarantee to reach good sealing effect while structural intergrity.
Description
Technical field
The invention belongs to the tubing and casing technical fields of petroleum industry to relate to, more particularly to a kind of aluminium alloy tubing and casing hermetic seal
Special thread connection structure.
Background technique
Aluminum alloy materials possess the cheap price of excellent plasticity, extra-strong corrosion resistant performance, ultralight weight, are production
Processing tubing and casing and the preferred material for substituting existing seamless steel pipe；But since aluminum alloy material elasticity modulus is low, surface hardness
The features such as low, is not suitable for existing seamless steel pipe special buckle design, and twist-on torque is excessive to will cause the viscous of aluminium alloy special buckle
Button, its too small sealing effect of twist-on torque is unobvious, is easy to reveal under high internal pressure state.
The present invention designs roof platform shoulder using inside and outside two, and controls successively to top sequence；To roof platform shoulder to top in first,
Guarantee the sealing effect of structure, secondly external seal shoulder carries out playing positioning action, and do not have at external seal shoulder to top again
Sealing surface, therefore higher torque can be born.The design can guarantee that aluminum alloy material tubing and casing is not sent out in use
Raw thread gluing phenomenon, and higher torque can be provided, it is anti-under the premise of guaranteeing gas tightness to cross torsion outstanding ability.And it is logical
Crossing outside observation can determine whether roof platform shoulder with the presence or absence of gap, and whether in place upper button, facilitates live use.
China Patent Publication No. is that 207795082 U of CN discloses a kind of aluminium alloy casing air-sealed special threaded connector,
Effect is the structure design increase screw thread engagement area that tube end uses external upset (EU), improves connector load-carrying properties, aluminum alloy sleeve
Pipe external screw thread upset end and aluminium alloy casing internal screw thread upset end use direct connection shape structure, reduce connector processing quantity, and reduction connects
Quantity is detained on head, improves tubing string sealing reliability, is adapted to that aluminium alloy plasticity is good, is easy to extrusion molding feature, is improved screw thread and is connect
Head mechanical performance.But using shoulder in list to top design, upper button twist-on operation when, by male end end face and female end to top
Shoulder realizes sealing to top, not using having the double of sequencing to design roof platform shoulder, also not according to aluminum alloy material feature
Provide male end helicitic texture length and female end helicitic texture Design of length range and male thread cusp diameter and box thread cusp
Diameter interpolation is to seal the scope of design of axial magnitude of interference, causes production product qualification rate lower, of poor quality.
Summary of the invention
The characteristics of for existing aluminum alloy material and the deficiencies in the prior art, the object of the present invention is to provide a kind of aluminium alloys
Tubing and casing air-sealed special threaded joint structure, the characteristics of according to aluminum alloy material, by rationally controlling aluminium alloy structure male and female
Reach interpolation is held, reaches inside and outside structure successively to top, guarantees the integrality of structure, by rationally controlling male and female end screw thread
Cusp diameter interpolation, reaches under the premise of thread gluing does not occur, and plays good sealing effect.
To achieve the above object, the present invention provides a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure, packets
The male end part in tube end maching and the female end part in tube end maching are included, pipe end can carry out upset processing, can also be without
Upset processing.Male end has with tapered male thread, inner sealing surface and outer to roof platform shoulder, and female end has female spiral shell with taper
Line, inner sealing surface and interior to roof platform shoulder.Above structure is in upper button use process, first to roof platform shoulder in male end end face and female end
To top, seal；Positioning action is played to top to roof platform shoulder outside next female end outer end face and male end.This is successively to top
The inside and outside hermetic seal ability and anti-torsion ability excessively that can effectively improve product to roof construction.But due to aluminum alloy material material
Can there are greatest differences with other metal material material properties, therefore male end helicitic texture length and female end helicitic texture length must
Following formula must be met simultaneously, good sealing effect could be reached while guaranteeing structural intergrity.
Wherein:GP: public spiral shell
Line cusp diameter；GB female end screw thread cusp diameter；W: nipple outer diameter；D: nipple internal diameter；P: thread pitch；LP: public
Hold helicitic texture length；LB female end helicitic texture length；E: the elasticity modulus of aluminum alloy material；σ: the surrender of aluminum alloy material is strong
Degree.
The nipple outer diameter is 60mm--340mm.
The male and female end is inclined ladder type tooth form, and 7 ° of tooth form introduction side angle -- 30 °, -10 ° of load side angle -10 ° is public
Female end tooth form 0.1-0.3mm of difference in height, the screw pitch of flute profile are 3-8 tooth of per inch, and taper is 1:12-1:16.
Hot setting has the high temperature of molybdenum disulfide or polytetrafluoroethylene (PTFE) solid to male and female end one or both ends simultaneously
Change figure layer.
The pipe end is through upset or not jumping-up thickening processing.
Detailed description of the invention
Fig. 1 is aluminium alloy tubing and casing air-sealed special threaded joint structure schematic diagram of the invention；
Fig. 2 is aluminium alloy tubing and casing air-sealed special threaded joint structure tooth form cooperation figure of the present invention；
Fig. 3 is aluminium alloy tubing and casing air-sealed special threaded joint structure male end schematic diagram of the present invention；
Fig. 4 is aluminium alloy tubing and casing air-sealed special threaded joint structure female end schematic diagram of the present invention.
In figure:
1, female end 2, male end 3, male thread
4, box thread 5, it is interior sealing 6, it is interior to roof platform shoulder
7, outer to roof platform shoulder GP: male end screw thread cusp diameter GB: female end screw thread cusp diameter
W: nipple outer diameter D: nipple internal diameter P: thread pitch
LP: male end helicitic texture length LB: female end helicitic texture length
Specific embodiment
Aluminium alloy tubing and casing air-sealed special threaded joint structure of the invention is illustrated in conjunction with attached drawing.
As shown in Figure 1, being included in pipe the present invention provides a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure
The male end part of processing and the female end part in tube end maching are held, pipe end can carry out upset processing, can also be without upset place
Reason.Male end has with tapered male thread, inner sealing surface and outer to roof platform shoulder, and female end has the box thread with taper, interior close
Cover and interior to roof platform shoulder.Male end reach is greater than female end reach, and the reach interpolation that male and female screw thread is formed makes public affairs
End end face first contacts in female end to roof platform shoulder at interior to top, behind female end end face contact male end it is outer to roof platform shoulder at outer to top；
The screw thread cusp diameter of the male end screw thread is greater than the screw thread cusp diameter of female end screw thread.Above structure is in upper button use process
In, to roof platform shoulder to jack-up sealing function first in male end end face and female end；Secondly female end outer end face and male end are outer to roof platform shoulder
Positioning action is arrived to jacking up.This is successively to the hermetic seal ability and anti-torsion excessively that can effectively improve product inside and outside top to roof construction
Ability.But since there are greatest differences, male end spiral shells with other metal material material properties for aluminum alloy material material property
Line structure length and female end helicitic texture length must satisfy following formula, could reach good while guaranteeing structural intergrity
Good sealing effect
Wherein:
GP: male thread cusp diameter；GB female end screw thread cusp diameter；W: nipple outer diameter；D: nipple internal diameter；P: screw thread spiral shell
Away from；LP: male end helicitic texture length；LB female end helicitic texture length；E: the elasticity modulus of aluminum alloy material；σ: aluminum alloy material
Yield strength.
There are inside and outside two shoulders for the structure to roof construction, to top sequence, first carries out internal screw thread shoulder to top, rear progress
External screw thread shoulder is to top, and there are inner seal structures for structure, and it is straight that the interior sealing cusp diameter of male end is greater than female end internal screw thread sealing cusp
Diameter, nipple outer diameter W range: 60mm -340mm.
It is of the invention be applied to aluminium alloy tubing and casing air-sealed special threaded joint structure by following two examples for
It is bright.
Example 1
The aluminium alloy hermetic seal tubing and casing of nipple outer diameter W=269.9mm, nipple internal diameter D=217.21mm.
Thread pitch P=5.08mm；Elastic modulus E=70000MPa of aluminum alloy material；The surrender of aluminum alloy material is strong
Spend σ=350MPa.It is calculated according to calculation formula (2):
0mm<GP-GB≤0.508mm
Therefore male thread cusp diameter GP=235.08, female end screw thread cusp diameter GB=234.58, GP-GB=are chosen
0.5, meet design and calculates requirement.It is calculated according to formula (1):
0.65mm≤LP-LB≤1.56mm
Therefore male end helicitic texture length LP=143.5mm, female end helicitic texture length LB=142.5mm are chosen.LP-LB
=1.0, which meet design, calculates requirement.
Example 2
The aluminium alloy hermetic seal tubing and casing of nipple outer diameter W=110mm, nipple internal diameter D=69mm.
Thread pitch P=4.23mm；Elastic modulus E=69000MPa of aluminum alloy material；The surrender of aluminum alloy material is strong
Spend σ=400MPa.It is calculated according to calculation formula (2):
0mm<GP-GB≤0.49mm
Therefore male thread cusp diameter GP=84 is chosen；Female end screw thread cusp diameter GB=83.6, GP-GB=0.4 meet
Design, which calculates, to be required.It is calculated according to formula (1):
0.26mm≤LP-LB≤0.64mm
Therefore male end helicitic texture length LP=80.5mm, female end helicitic texture length LB=80mm are chosen.LP-LB=
0.5, which meets design, calculates requirement.
Claims (6)
1. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure, including the male end part in tube end maching and in pipe end
The female end part of processing, the male end have with tapered male thread, inner sealing surface and outer to roof platform shoulder, and the female end has
Box thread, inner sealing surface with taper and interior to roof platform shoulder, it is characterized in that: to be greater than female end screw thread long for the male end reach
Degree, the reach interpolation that male and female screw thread is formed contact male end end face first in female end to roof platform shoulder at interior to top, female end end
Contacted behind face male end it is outer to roof platform shoulder at outer to top；The screw thread cusp diameter of the male end screw thread is greater than the screw thread of female end screw thread
Cusp diameter.
2. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure according to claim 1, it is characterized in that: described
Male end helicitic texture length and female end helicitic texture length meet following formula simultaneously:
Wherein:
GP: male thread cusp diameter；GB female end screw thread cusp diameter；W: nipple outer diameter；D: nipple internal diameter；P: screw thread
Screw pitch；LP: male end helicitic texture length；LB female end helicitic texture length；E: the elasticity modulus of aluminum alloy material；σ: aluminium alloy material
The yield strength of matter.
3. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure according to claim 1 or 2, it is characterized in that:
The nipple outer diameter is 60mm--340mm.
4. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure according to claim 1 or 2, it is characterized in that:
The male and female end is inclined ladder type tooth form, 7 ° of tooth form introduction side angle -- and 30 °, -10 ° of load side angle -10 °, male and female end tooth shape
0.1-0.3mm of difference in height, the screw pitch of flute profile are 3-8 tooth of per inch, and taper is 1:12-1:16.
5. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure according to claim 1 or 2, it is characterized in that:
Male and female end one or both ends while hot setting have the hot setting figure layer of molybdenum disulfide or polytetrafluoroethylene (PTFE).
6. a kind of aluminium alloy tubing and casing air-sealed special threaded joint structure according to claim 1, it is characterized in that: described
Pipe end is through upset or not jumping-up thickening processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118928.2A CN109736724A (en) | 2019-02-18 | 2019-02-18 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118928.2A CN109736724A (en) | 2019-02-18 | 2019-02-18 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109736724A true CN109736724A (en) | 2019-05-10 |
Family
ID=66367588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910118928.2A Pending CN109736724A (en) | 2019-02-18 | 2019-02-18 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109736724A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE857031A (en) * | 1976-07-23 | 1978-01-23 | Vallourec Lorraine Escaut | SEAL FOR TUBES, ESPECIALLY FOR OIL TUBES |
| US5829797A (en) * | 1994-11-22 | 1998-11-03 | Sumitomo Metal Industries, Ltd. | Threaded joint for oil well pipes |
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| CN206111106U (en) * | 2016-09-08 | 2017-04-19 | 天津钢管集团股份有限公司 | Special screwed joint connects structure for be used for titanium alloy oil well pipe |
| CN107558934A (en) * | 2017-10-09 | 2018-01-09 | 天津钢管集团股份有限公司 | Extreme line casing thread joint |
| CN209687429U (en) * | 2019-02-18 | 2019-11-26 | 天津钢管制造有限公司 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Effective date of registration: 20190703 Address after: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Applicant after: Tianjin Steel Tube Manufacturing Co., Ltd. Address before: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Applicant before: Tianjin Steel Pipe Group Co., Ltd. |