CN203230350U - Straight thread tooth form structure - Google Patents
Straight thread tooth form structure Download PDFInfo
- Publication number
- CN203230350U CN203230350U CN 201320100717 CN201320100717U CN203230350U CN 203230350 U CN203230350 U CN 203230350U CN 201320100717 CN201320100717 CN 201320100717 CN 201320100717 U CN201320100717 U CN 201320100717U CN 203230350 U CN203230350 U CN 203230350U
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- Prior art keywords
- thread
- crest
- bearing surface
- radius
- screw thread
- Prior art date
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- Expired - Fee Related
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- 238000005553 drilling Methods 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 2
- 239000003209 petroleum derivative Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction 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
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Abstract
A straight thread tooth type structure belongs to the technical field of petroleum and natural gas drilling tools. The connection part of the internal thread joint and the external thread joint is provided with thread taper, the thread bearing surface is vertical to the thread axis, the crest is provided with a radius, the root is parallel to the thread taper, the thread bearing surface and the thread guide surface are provided with the radius, and the thread profile is provided with height, thread pitch, thread crest width, and the included angle and radius between the thread guide surface and the crest. The utility model has the advantages that the component force perpendicular to the axis in the thread bearing surface is reduced to the minimum, the thread root is protected well, the service life of the drilling tool is prolonged, the risk of cracking of the thread root along the perpendicular direction is greatly reduced, and the service life of the thread of the drilling tool is integrally prolonged; simple structure, convenient processing and easy operation, and does not need to purchase special tools.
Description
Technical field
The utility model relates to a kind of straight thread tooth form structure, belongs to oil, natural gas drill and petroleum extraction tools technical field.
Background technology
Drill string bears complex loads such as pulling force, pressure, buoyancy, flexural stress and alternating stresses in drilling process the time, and screw thread becomes weak part because of itself design feature, especially in position, tooth bottom.Usually two sides with the form of thread angle are divided into bearing surface and spigot surface (as shown in Figure 1).As its name suggests, the screw thread bearing surface is exactly the face that bears active force, and its active force is decomposed into two active forces vertical and that parallel to the axis perpendicular to the surface with it.By statistics, the crackle of most of Bottom of Thread prolongs perpendicular to axis direction and extends downwards, just prolongs the active force cracking of vertical axis.We know that the drilling tool material is generally the toughness material, and majority is ductile fracture, just prolong maximum shear stress direction cracking, and therefore, the active force that reduces perpendicular to axis is to reduce the stressed key of bearing surface.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of straight thread tooth form structure.
A kind of straight thread tooth form structure is characterized in that the connecting portion of female adapter and male connection has thread taper; The screw thread bearing surface is perpendicular to the axis of thread, and crest has chamfering radius; Parallel with thread taper at the bottom of the tooth, screw thread bearing surface and screw thread spigot surface have chamfering radius;
Form of thread has angle and the chamfering radius of thread height, pitch, crest width, screw thread bearing surface, screw thread spigot surface and screw thread spigot surface and crest.
The utility model has the advantages that and reduce to the effect component perpendicular to axis in the screw thread bearing surface minimum, the better protect Bottom of Thread, prolong drilling tool application life, greatly reduce Bottom of Thread and prolong the risk of vertical direction cracking, integral body has improved drilling tool screw thread application life; Simple in structure, easy operating easy to process need not to buy special tool.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the utility model better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present utility model, constitute a part of the present utility model, illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not constitute improper restriction of the present utility model, as figure wherein:
Fig. 1 is straight thread tooth form structural representation of the present utility model.
Fig. 2 is A of the present utility model portion structure structure for amplifying schematic diagram.
Below in conjunction with drawings and Examples the utility model is further specified.
The specific embodiment
Obviously, the many modifications and variations done based on aim of the present utility model of those skilled in the art belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1 and Figure 2,
A kind of straight thread tooth form structure comprises female adapter 1, male connection 2, and its connecting portion has thread taper; Screw thread bearing surface 3 is perpendicular to the axis of thread, and crest 4 has chamfering radius; 5 is parallel with thread taper at the bottom of the tooth, and screw thread bearing surface 3 and screw thread spigot surface 6 have chamfering radius;
Form of thread has angle and the chamfering radius of height, pitch, crest 4 width and screw thread spigot surface 6 and crest 4.
Embodiment 2: as shown in Figure 1 and Figure 2, a kind of straight thread tooth form structure comprises female adapter 1, male connection 2, and its connecting portion tapering is the tapering of original thread.Screw thread bearing surface 3 is perpendicular to the axis of thread, still gets the tooth form crest chamfering radius of original thread with the chamfering radius of crest 4.5 is parallel with thread taper at the bottom of the tooth, with the chamfering radius of screw thread bearing surface 3 and screw thread spigot surface 6 still be radius of corner at the bottom of the tooth form tooth of original thread, form of thread height, pitch, crest 4 width and screw thread spigot surface 6 are identical with original thread with angle and the chamfering radius of crest 4.
Described original thread is the API NC style connection thread.
Embodiment 3: as shown in Figure 1 and Figure 2,
A kind of straight thread tooth form structure, thread taper is 1:6, pitch is 6.35mm, thread height is 3.095mm, screw thread bearing surface 3 is perpendicular to the axis of thread, with the radius of corner of crest 4 be 0.381mm, crest 4 width are 1.651mm.5 is parallel with thread taper at the bottom of the tooth, and 5 width are 3mm at the bottom of the tooth, with the radius of corner of screw thread bearing surface 3 and screw thread spigot surface 6 be 0.965mm.Screw thread spigot surface 6 is 60 ° with axis angle.
As mentioned above, embodiment of the present utility model is explained, but as long as not breaking away from inventive point of the present utility model and effect in fact can have a lot of distortion, this will be readily apparent to persons skilled in the art.Can be according to form of thread and the corresponding thread parameter of the utility model content choice.Therefore, such variation also all is included within the protection domain of the present utility model.
Claims (1)
1. a straight thread tooth form structure is characterized in that the connecting portion of female adapter and male connection has thread taper; The screw thread bearing surface is perpendicular to the axis of thread, and crest has chamfering radius; Parallel with thread taper at the bottom of the tooth, screw thread bearing surface and screw thread spigot surface have chamfering radius;
Form of thread has angle and the chamfering radius of thread height, pitch, crest width, screw thread bearing surface, screw thread spigot surface and screw thread spigot surface and crest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320100717 CN203230350U (en) | 2013-03-06 | 2013-03-06 | Straight thread tooth form structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320100717 CN203230350U (en) | 2013-03-06 | 2013-03-06 | Straight thread tooth form structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203230350U true CN203230350U (en) | 2013-10-09 |
Family
ID=49286483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320100717 Expired - Fee Related CN203230350U (en) | 2013-03-06 | 2013-03-06 | Straight thread tooth form structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203230350U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420466A (en) * | 2015-12-02 | 2016-03-23 | 西安航天动力机械厂 | Method for protecting screw hole in heat treatment |
| CN108590542A (en) * | 2018-06-21 | 2018-09-28 | 上海海隆石油管材研究所 | A kind of screw connection structure |
-
2013
- 2013-03-06 CN CN 201320100717 patent/CN203230350U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105420466A (en) * | 2015-12-02 | 2016-03-23 | 西安航天动力机械厂 | Method for protecting screw hole in heat treatment |
| CN105420466B (en) * | 2015-12-02 | 2017-04-12 | 西安航天动力机械厂 | Method for protecting screw hole in heat treatment |
| CN108590542A (en) * | 2018-06-21 | 2018-09-28 | 上海海隆石油管材研究所 | A kind of screw connection structure |
| CN108590542B (en) * | 2018-06-21 | 2023-10-24 | 上海海隆石油管材研究所 | Threaded connection 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: 20131009 Termination date: 20210306 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |