CN202447769U - Thread blade for machining internal thread of air-tight seal joint - Google Patents
Thread blade for machining internal thread of air-tight seal joint Download PDFInfo
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- CN202447769U CN202447769U CN2011205511429U CN201120551142U CN202447769U CN 202447769 U CN202447769 U CN 202447769U CN 2011205511429 U CN2011205511429 U CN 2011205511429U CN 201120551142 U CN201120551142 U CN 201120551142U CN 202447769 U CN202447769 U CN 202447769U
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Abstract
The utility model relates to a thread blade for machining the internal thread of an air-tight seal joint. The thread blade comprises a body with a turning bevel, wherein the body is provided with a pull rod mounting hole perpendicular to the machining advance direction and horizontal plane; the bevel angle of the turning bevel is 8-12 degrees; and the turning bevel consists of a front transition arc surface, a turning corner part, a circular arc groove, a rear transition arc surface and a bevel from front to back in sequence in the machining advance direction. According to the thread blade, the technical problem that the internal thread with special size and structure of a low pressure air-tight seal threaded joint cannot be accurately machined by the conventional thread blade is solved; thread form parameters matched with internal thread design parameters of the low pressure air-tight seal threaded joint are adopted; the internal thread of the low pressure air-tight seal threaded joint can be accurately machined; the mounting is simple; the single-sheet strength is large; and the machined product is stable and reliable.
Description
Technical field
The utility model belongs to oil, Gas Industry oil well pipe thread processing technique field, is specifically related to a kind of low pressure gas field and uses the screw thread blade with hermetic seal joint internal thread machining.
Background technology
In oil, the construction of natural gas fields, the sleeve pipe that is adopted is the casing string that is connected to form by nipple, and nipple is the weakest link in the tubing string, and its structural intergrity, sealing integrity and reliability have a strong impact on the safety in production and the tubing string life-span in oil field.CNPC Tubular Goods Research Institute from the low pressure gas field to the dependability and the gas tightness of sleeve pipe; Develop the low pressure gas field of a kind of two-stage sealing and screw thread transition structure form and use seal nipple; In bonding strength that has guaranteed tubing string and sealing property; Reduce the factory process difficulty again, practiced thrift production cost.This low pressure is similar to API round thread type with the air-tight seal screw joint thread forms, but improves, and adopts existing API round thread processing blade can't process qualified low pressure and uses the air-tight seal screw joint screw thread.Therefore, need a kind of screw thread blade that can process this hermetic seal special joint screw thread accurately of exploitation.
Summary of the invention
The utility model purpose provides a kind of hermetic seal joint internal thread machining and uses the screw thread blade, and it has solved existing screw thread blade can not accurately process the technical problem of a kind of low pressure with the special size and the structure internal thread of air-tight seal screw joint.
The technical solution of the utility model is:
A kind of hermetic seal joint internal thread machining is used the screw thread blade,
Its special character is:
Comprise the body 1 that has the turning inclined-plane, said body 1 is provided with the installation tie rod hole 9 perpendicular to processing direction of advance and horizontal plane;
The draft angle b on said turning inclined-plane is 8～12 °; Said turning inclined-plane is made up of preceding transition cambered surface 11, turning bight 8, circular arc type groove 12, back transition cambered surface 13, inclined-plane 4 along the processing direction of advance from front to back successively;
The top in said turning bight 8 is processing arc surface 10, the arc radius R of end, said turning bight 10
1Be 0.335～0.435mm; The front end of said processing arc surface 10 is connected with front end face 7 transition of body 1 through preceding transition cambered surface 11, and the rear end of said processing arc surface 10 carries out the transition to inclined-plane 4, the groove arc radius R of said circular arc type groove 12 through circular arc type groove 12 and back transition cambered surface 13
2Be 0.335～0.435mm; Said turning bight 8 height h are 1.6～2.0mm; Said turning bight 8 open-angle a are 55～65 °.
Between the inclined-plane 4 of above-mentioned body 1 and the rear end face 5 chamfering is set.
Above-mentioned screw thread blade outer surface is provided with composite coating.
The technique effect that the utlity model has is:
1, the utility model adopt with low pressure with the form of thread parameter that the internal thread design parameter of air-tight seal screw joint is complementary, can accurately process the internal thread of low pressure with air-tight seal screw joint.
2, the turning bight height of the utility model is following tolerance, can guarantee that the internal thread tooth form that processes is partial to plus tolerance, helps joint and twists and connect cooperation.
3, easement curve can prevent effectively that the turning iron filings from twining before and after turning angle of bevel of the utility model and the turning angle, reduces the damage of chip removal double thread, improves the rate that manufactures a finished product.
4, the utility model is installed simply, and monolithic intensity is big, and converted products is reliable and stable, can be applicable to preferably that low pressure uses the air-tight seal screw joint internal thread machining.
Description of drawings
Fig. 1 is the view that attaches of the utility model screw thread blade;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the enlarged drawing in turning bight 8 among Fig. 1;
Fig. 4 is the structure chart of the measured low pressure gas field of the utility model ring gauge with the hermetic seal male connection;
Fig. 5 be with the low pressure gas field with the structure chart of the corresponding low pressure of hermetic seal male connection gas field with the hermetic seal female adapter;
Wherein: the 1-body; Plane on the 2-body; 3-body lower plane; The 4-inclined-plane; 5-body rear end face; 7-body front end face; 8-turning bight; The 9-tie rod hole; 10-processes cambered surface; Transition cambered surface before the 11-; 12-circular arc type groove; Transition cambered surface behind the 13-; A-turning bight open-angle; The b-draft angle; H-turning bight height; R
1End ,-turning bight arc radius; R
2The groove arc radius of-circular arc type groove; α-loading end angle; β-spigot surface angle; R-tooth top (end) arc radius; The B1-alveolus is wide; The B2-dental ridge is wide; The H-tooth is high; The O-internal thread becomes awl.
The specific embodiment
Referring to Fig. 4, the hermetic seal male connection is used in a kind of low pressure gas field, and the resistance to tension behind the last button has been improved in loading end angle [alpha]=3 °～30 °; Spigot surface angle beta=30 °～45 °, the button guiding is stable in the assurance; Tooth top circular arc radius R=0.38mm～0.42mm has the auxiliary seal effect simultaneously at anti-stick button; Wide B1=1.3mm～the 1.5mm of alveolus is prone to make-up when detaining in the assurance thread alternating does not take place; Wide B2=1.6mm～the 1.8mm of dental ridge, button back loading end contacts with spigot surface in the assurance; High H=1.9mm～the 2.2mm of tooth has improved tensile strength; Pitch N is per inch 6 teeth～8 teeth, the intensity in the assurance under button and the tensile load.During practical implementation, can select this special thread sleeve pipe of different size for use according to the requirement of concrete operating mode.Adopt and the same processing technology of API screw thread during manufacturing.Wherein box cupling and body be with a grade of steel or a high grade of steel, on when detaining two ends evenly smear the API thread compound, clamping box cupling middle part, factory's end adopts on the peak torque to be detained, on-the-spot end adopts on the best torque to be detained.
Referring to Fig. 5, the hermetic seal female adapter is used in a kind of low pressure gas field, and the resistance to tension behind the last button has been improved in loading end angle [alpha]=3 °～30 °; Spigot surface angle beta=30 °～45 °, the button guiding is stable in the assurance; Arc radius R=0.38mm～0.42mm at the bottom of the tooth has the auxiliary seal effect simultaneously at anti-stick button; Wide B1=1.3mm～the 1.5mm of alveolus is prone to make-up when detaining in the assurance thread alternating does not take place; Wide B2=1.6mm～the 1.8mm of dental ridge, button back loading end contacts with spigot surface in the assurance; High H=1.9mm～the 2.2mm of tooth has improved tensile strength; Pitch N is per inch 6 teeth～per inch 8 teeth, the intensity in the assurance under button and the tensile load; Referring to Fig. 5, internal thread becomes awl O and is 67mm/m～73mm/m, forms effective sealed engagement.During practical implementation, can select this special thread sleeve pipe of different size for use according to the requirement of concrete operating mode.Adopt and the same processing technology of API screw thread during manufacturing.Wherein box cupling and body be with a grade of steel or a high grade of steel, internal thread phosphatization thickness >=20um, on when detaining two ends evenly smear the API thread compound, clamping box cupling middle part, factory's end adopts on the peak torque to be detained, on-the-spot end adopts on the best torque to be detained.
Like Fig. 1, Fig. 2 and shown in Figure 3, the utility model hermetic seal joint internal thread machining is used the screw thread blade, comprises the body 1 that has the turning inclined-plane, and said body 1 is provided with the installation tie rod hole 9 perpendicular to processing direction of advance and horizontal plane; The draft angle b on said turning inclined-plane is 8～12 °; Said turning inclined-plane is made up of preceding transition cambered surface 11, turning bight 8, circular arc type groove 12, back transition cambered surface 13, inclined-plane 4 along the processing direction of advance from front to back successively; The top in said turning bight 8 is processing arc surface 10, and the parameter in turning bight and low pressure are complementary with the inner thread parameter of air-tight seal screw joint; The arc radius R of end, said turning bight 10
1Be 0.335～0.435mm; The front end of said processing arc surface 10 is connected with front end face 7 transition of body 1 through preceding transition cambered surface 11, and the rear end of said processing arc surface 10 carries out the transition to inclined-plane 4, the groove arc radius R of said circular arc type groove 12 through circular arc type groove 12 and back transition cambered surface 13
2Be 0.335～0.435mm; Said turning bight 8 height h are 1.6～2.0mm; Said turning bight 8 open-angle a are 55～65 °; Between the inclined-plane 4 of said body 1 and the rear end face 5 chamfering is set; Described screw thread blade outer surface is provided with composite coating, guarantees that blade is difficult for scratching or damaging.
The body middle part has one tie rod hole is installed, and when blade is installed pull bar will be installed and pass tie rod hole, and blade is fixed on the tool rest, carries out special thread processing.
Claims (3)
1. a hermetic seal joint internal thread machining is used the screw thread blade,
It is characterized in that:
Comprise the body (1) that has the turning inclined-plane, said body (1) is provided with the installation tie rod hole (9) perpendicular to processing direction of advance and horizontal plane;
The draft angle (b) on said turning inclined-plane is 8～12 °; Said turning inclined-plane is made up of preceding transition cambered surface (11), turning bight (8), circular arc type groove (12), back transition cambered surface (13), inclined-plane (4) along the processing direction of advance from front to back successively;
The top in said turning bight (8) is processing arc surface (10), the arc radius (R of end, said turning bight (10)
1) be 0.335～0.435mm; The front end of said processing arc surface (10) is connected with front end face (7) transition of body (1) through preceding transition cambered surface (11); The rear end of said processing arc surface (10) carries out the transition to inclined-plane (4), the groove arc radius (R of said circular arc type groove (12) through circular arc type groove (12) and back transition cambered surface (13)
2) be 0.335～0.435mm; Said turning bight (8) highly (h) is 1.6～2.0mm; Said turning bight (8) open-angle (a) is 55～65 °.
2. hermetic seal joint internal thread machining according to claim 1 is used the screw thread blade, it is characterized in that: between the inclined-plane (4) of said body (1) and the rear end face (5) chamfering is set.
3. hermetic seal joint internal thread machining according to claim 1 and 2 is used the screw thread blade, it is characterized in that: described screw thread blade outer surface is provided with composite coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205511429U CN202447769U (en) | 2011-12-19 | 2011-12-19 | Thread blade for machining internal thread of air-tight seal joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205511429U CN202447769U (en) | 2011-12-19 | 2011-12-19 | Thread blade for machining internal thread of air-tight seal joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202447769U true CN202447769U (en) | 2012-09-26 |
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ID=46863663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205511429U Expired - Fee Related CN202447769U (en) | 2011-12-19 | 2011-12-19 | Thread blade for machining internal thread of air-tight seal joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202447769U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028858A (en) * | 2014-05-22 | 2014-09-10 | 中国石油集团石油管工程技术研究院 | Alloy blade for machining internal threads of sealing screwed joint |
-
2011
- 2011-12-19 CN CN2011205511429U patent/CN202447769U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104028858A (en) * | 2014-05-22 | 2014-09-10 | 中国石油集团石油管工程技术研究院 | Alloy blade for machining internal threads of sealing screwed joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20131219 |