CN203230351U - Drilling tool thread structure for increasing tooth bottom width - Google Patents
Drilling tool thread structure for increasing tooth bottom width Download PDFInfo
- Publication number
- CN203230351U CN203230351U CN 201320112120 CN201320112120U CN203230351U CN 203230351 U CN203230351 U CN 203230351U CN 201320112120 CN201320112120 CN 201320112120 CN 201320112120 U CN201320112120 U CN 201320112120U CN 203230351 U CN203230351 U CN 203230351U
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- Prior art keywords
- thread
- drilling tool
- width
- tooth bottom
- joint
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- 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.)
- Expired - Fee Related
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 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 drilling tool thread structure for increasing the width of a tooth bottom belongs to the technical field of petroleum and natural gas drilling tools. The device comprises an internal thread joint and an external thread joint, wherein the internal thread joint is meshed with the external thread joint; the taper of the connecting part of the internal thread joint and the external thread joint is the taper of the thread of the API drilling tool, the depth of the thread is larger than that of the thread of the API drilling tool, the width of the thread root is larger than that of the thread root of the thread of the API drilling tool, and the width of the thread crest is 0.3-0.5 mm. The utility model has the advantages that the tooth bottom width is increased, the stress notch coefficient of the tooth bottom part is reduced, the stress concentration of the part is reduced, and the service life of the thread of the drilling tool is prolonged. The thread guide surface has the advantages of changing the width of the thread bottom and the width of the thread top, having no influence on the thread bearing surface and other parameters, being easy to process, not needing to replace a cutter and the like.
Description
Technical field
The utility model relates to a kind of drilling tool helicitic texture that increases tooth bottom width degree, belongs to oil, natural gas drill and petroleum extraction tools technical field.
Background technology
API drilling tool screw thread is a kind of taper pipe thread with shoulder.Because reasons such as shackle is frequent on the drilling tool screw thread, and bearing load is big, and environment for use is abominable, often easily lost efficacy in drilling tool screw thread position, and under metallographic microscope, crackle mainly is located at the Bottom of Thread position, and the one-tenth divergent shape, most of crackle is because tired caused by analysis.In order to improve the anti-fatigue performance of drilling tool screw thread, often process various stress dispersion slots at the screw thread position, these methods have obtained some effects really, but have just solved subregion high stress concentrations problem, and itself does not have specific aim double thread.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of drilling tool helicitic texture that increases tooth bottom width degree, increases Bottom of Thread width and thread height, reduces the thread crest width, to alleviate the problem that Bottom of Thread stress is concentrated.
A kind of drilling tool helicitic texture that increases tooth bottom width degree comprises female adapter, male connection, female adapter and male connection engagement;
The connecting portion tapering of female adapter and male connection is API drilling tool thread taper,
The tooth form degree of depth is greater than the tooth form degree of depth of API drilling tool screw thread;
The Bottom of Thread width is greater than the Bottom of Thread width of API drilling tool screw thread;
The thread crest width is 0.3～0.5mm.
The utility model has the advantages that to have increased tooth bottom width degree, reduced tooth bottom position stress notch factor, reduced the stress at this position and concentrated, prolong drilling tool screw thread application life.
This is simple in structure, has just changed tooth bottom width degree and crest width, has been offset screw thread spigot surface position on an equal basis, and double thread bearing surface and other parameter did not influence have advantages such as being easy to process, not needing to change cutter.
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 structural representation of the present utility model.
Fig. 2 is A of the present utility model portion structure enlarged 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 drilling tool helicitic texture that increases tooth bottom width degree is characterized in that comprising female adapter 1, male connection 2, female adapter 1 and male connection 2 engagements;
The tooth form degree of depth is greater than the tooth form degree of depth of API drilling tool screw thread;
Bottom of Thread 3 width are greater than the Bottom of Thread width of API drilling tool screw thread;
Thread crest 5 width are 0.3～0.5mm.
Embodiment 2: as shown in Figure 1 and Figure 2,
A kind of drilling tool helicitic texture that increases tooth bottom width degree comprises female adapter 1, male connection 2; On the basis of the technical data of original thread, increasing the tooth form degree of depth and Bottom of Thread 3 width during turning simultaneously, reducing thread crest 5 width is 0.3～0.5mm, and skew screw thread spigot surface 4 changes with the screw thread spigot surface of original thread; Other parameter constants of screw thread.
Original thread refers to API drilling tool screw thread.
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.Therefore, such variation also all is included within the protection domain of the present utility model.
Claims (1)
1. a drilling tool helicitic texture that increases tooth bottom width degree is characterized in that comprising female adapter, male connection, female adapter and male connection engagement; The connecting portion tapering of female adapter and male connection is API drilling tool thread taper, and the tooth form degree of depth is greater than the tooth form degree of depth of API drilling tool screw thread; The Bottom of Thread width is greater than the Bottom of Thread width of API drilling tool screw thread; The thread crest width is 0.3～0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112120 CN203230351U (en) | 2013-03-13 | 2013-03-13 | Drilling tool thread structure for increasing tooth bottom width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320112120 CN203230351U (en) | 2013-03-13 | 2013-03-13 | Drilling tool thread structure for increasing tooth bottom width |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203230351U true CN203230351U (en) | 2013-10-09 |
Family
ID=49286484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320112120 Expired - Fee Related CN203230351U (en) | 2013-03-13 | 2013-03-13 | Drilling tool thread structure for increasing tooth bottom width |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203230351U (en) |
-
2013
- 2013-03-13 CN CN 201320112120 patent/CN203230351U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20210313 |