CN104028857A - Alloy blade for machining external threads of sealing screwed joint - Google Patents
Alloy blade for machining external threads of sealing screwed joint Download PDFInfo
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- CN104028857A CN104028857A CN201410219410.5A CN201410219410A CN104028857A CN 104028857 A CN104028857 A CN 104028857A CN 201410219410 A CN201410219410 A CN 201410219410A CN 104028857 A CN104028857 A CN 104028857A
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Abstract
The invention provides an alloy blade for machining external threads of a sealing screwed joint. The alloy blade comprises a body with a cutting bevel. The oblique angle of the cutting bevel ranges from nine degrees to fifteen degrees. Thread cutting teeth are arranged on the cutting bevel. Each thread cutting tooth comprises a thread guiding cutting face, a tooth bottom guiding transition circular arc, a tooth bottom cutting face, a tooth bottom bearing transition circular arc, a bearing cutting face, a tooth crest bearing transition circular arc and a tooth crest cutting face, wherein the thread guiding cutting face, the tooth bottom guiding transition circular arc, the tooth bottom cutting face, the tooth bottom bearing transition circular arc, the bearing cutting face, the tooth crest bearing transition circular arc and the tooth crest cutting face are connected with one another in sequence to form a thread cutting tooth working curved surface. The body comprises a front end face which enters the working state firstly and a rear end face opposite to the front end face. One thread guiding cutting face is connected with the front end face of the body. One tooth crest cutting face is connected with the rear end face of the body. The alloy blade has the advantages of being capable of accurately machining the external threads of the sealing screwed joint, stable in quality and high in yield.
Description
Technical field
The invention belongs to the processing technique field that petroleum and natural gas industry completion flow string connects sealing thread, relate to a kind of sealing thread joint external screw thread processing alloy blade, relate in particular to a kind of economical sealing thread joint external screw thread processing alloy blade for China's Midwest oil gas field.
Background technology
Along with further going deep into of natural petroleum gas field, Central China and western constantly exploration and development of many oil gas fields quilts, in its exploitation, exist the present situation of the low abundance of petroleum resources, hyposmosis, low output, only have and adopt the pattern of low cost development just can obtain economic benefit.And in industrial gas oil development process, the tubing and casing adopting is to twist and connect the tubing string connecting to form with screw thread, screw thread is the weakest link in oil casing, and its structural intergrity, sealing integrity and reliability have a strong impact on safety in production and the tubing string life-span in oil field.Common API screw thread is due to congenital deficiency in structural design own, cannot meet the sealing integrity in Oil/gas Well environment, very easily there is serious oil and gas leakage accident, and the widely used Special threading connector of current institute is because cost is higher, inspection during manufacture requires strict, in addition between various button-types, cannot change generally, more cannot meet overcast Development Strategy of China Midwest " three is low " oil gas field.CNPC Tubular Goods Research Institute is not high for China's Midwest oil gas field environmental requirement, tubing and casing use cost is low, the feature of highly versatile, developed a kind of economical sealing Special threading connector, when guaranteeing the bonding strength and sealing property of tubing string, reduced factory process difficulty and saved production cost, there is highly versatile, easily upper/shackle simultaneously, be convenient to maintenance, feature easy to detect.Sealing nipple is different from traditional API screw thread, adopts existing Cutting blade for machining screw thread on the market cannot process this screw thread.
Summary of the invention
In order to solve the above-mentioned technical problem existing in background technology, the invention provides a kind of energy accurate machining sealing thread joint external screw thread and steady quality and the high sealing thread joint external screw thread processing alloy blade of yield rate.
Technical solution of the present invention is: the invention provides a kind of sealing thread joint external screw thread processing alloy blade, its special character is: described sealing thread joint external screw thread processing comprises that with alloy blade the draft angle on described cutting inclined-plane is 9～15 ° with the body on cutting inclined-plane; Described cutting inclined-plane is provided with at least one screw chasing tooth; Described screw chasing tooth comprises carrying transition arc at the bottom of guiding transition arc at the bottom of screw thread guiding cutting face, tooth, tooth undercutting bevel, tooth, carrying cutting face, tooth top carrying transition arc and tooth top cutting face; At the bottom of described screw thread guiding cutting face, tooth, at the bottom of guiding transition arc, tooth undercutting bevel, tooth, carrying transition arc, carrying cutting face, tooth top carrying transition arc and tooth top cutting face are in turn connected to form screw chasing tooth working curved surface; Described body comprises front end face and the rear end face relative with front end face that first enters duty; Described screw thread guiding cutting face is connected with the front end face of body; Described tooth top cutting face is connected with the rear end face of body.
When above-mentioned screw chasing tooth is a plurality of; Between described connected screw chasing tooth, by the tooth top transition arc that leads, be connected.
The tooth top cutting face of the last screw chasing tooth of above-mentioned adjacent two screw chasing teeth is connected by the lead screw thread guiding cutting face of transition arc and a rear screw chasing tooth of tooth top.
Above-mentioned cutting inclined-plane also comprises and is arranged on the tooth top cutting face of last screw chasing tooth and the inclined-plane between the rear end face of body; The tooth top cutting face of described last screw chasing tooth is connected with the rear end face of body by inclined-plane.
The angle that above-mentioned screw thread guiding cutting face and front end face form forms screw thread spigot surface angle α, and the scope of described screw thread spigot surface angle α is 40 °～60 °; The angle that the parallel surface of described carrying cutting face and front end face forms is screw thread loading end angle β, and the scope of described screw thread loading end angle β is-3 °～3 °.
At the bottom of above-mentioned tooth, guiding transition arc radius is 0.10mm～0.22mm; At the bottom of described tooth, the radius of carrying transition arc is 0.13mm～0.25mm; The radius of described tooth top carrying transition arc is 0.17mm～0.30mm; The radius of described tooth top guiding transition arc is 0.73mm～0.88mm; The height H of the screw chasing tooth on described cutting inclined-plane is 1.455mm～2.225mm; The width of the wide L1 of described cutting teeth ridge is 2.55mm～2.65mm; The width of described cutting teeth groove width L2 is 2.45mm～2.60mm.
The slope on above-mentioned inclined-plane is 1:20～1:50.
Above-mentioned thread undercutting bevel and tooth top cutting face are parallel to each other, and the slope in described thread undercutting bevel and tooth top cutting face is all 1:12～1:18.
Between above-mentioned inclined-plane and rear end face, be provided with chamfering.
The outer surface of above-mentioned screw chasing tooth is provided with for strengthening the composite coating of anti-wear performance; On described body, be provided with the installation tie rod hole perpendicular to processing direction of advance and horizontal plane; The quantity of described screw chasing tooth is 1-7.
Advantage of the present invention is:
External screw thread processing blades of the present invention adopts the form of thread parameter matching with economical sealing thread joint external screw thread design parameter with Midwest oil gas field, can accurately process the external screw thread of economical sealing thread joint for the oil gas field of Midwest.Sealing thread joint external screw thread processing provided by the invention comprises the body with cutting inclined-plane with alloy blade, cutting inclined-plane has 1～7 identical screw chasing tooth from left to right, and each screw chasing tooth is followed successively by carrying transition arc at the bottom of guiding transition arc at the bottom of screw thread guiding cutting face, tooth, tooth undercutting bevel, tooth, carrying cutting face, tooth top carrying transition arc, tooth top cutting face, tooth top guiding transition arc from left to right.The height of screw chasing tooth of design is plus tolerance, can guarantee the external screw thread tooth form deflection negative common difference that processes, is conducive to joint and twists and connect cooperation.Simultaneously the present invention has optimized the size of excessive circular arc at the bottom of tooth top tooth, can effectively prevent that the stress in processing and upper shackle process from concentrating, and is convenient to chip removal, effectively improves the yield rate of product; Cutting inclined-plane in blade body can arrange a plurality of identical screw chasing teeth, the stress while cutting to alleviate, and single blade long service life, accuracy is high.Sealing thread joint external screw thread processing of the present invention is installed simple with alloy blade, monolithic intensity is large, long service life, and the steady quality of converted products, yield rate is high, can be applicable to preferably the external screw thread processing of economical sealing thread joint for the oil gas field of Midwest.Energy accurate machining of the present invention goes out economical sealing thread joint external screw thread for this Midwest oil gas field, has solved existing threaded blade and cannot accurate machining have gone out the economical technical problem that can general sealing thread joint of a kind of China Midwest oil gas field.
Accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of alloy blade for sealing thread joint external screw thread processing provided by the present invention;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the structure for amplifying schematic diagram of screw chasing tooth in Fig. 1;
Fig. 4 is the economical sealing male connection structure chart for the oil gas field of Midwest that uses blade processing to obtain.
Wherein:
1-body; 2-tooth top guiding transition arc; 3-tooth top cutting face; 4-tooth top carrying transition arc; 5-carries cutting face; Carrying transition arc at the bottom of 6-tooth; 7-tooth undercutting bevel; Guiding transition arc at the bottom of 8-tooth; 9-screw thread guiding cutting face; 10-front end face; 11-body bottom; 12-inclined-plane; 13-rear end face; Plane in 14-blade body; 15-blade body lower plane; 16-installs tie rod hole; α-spigot surface angle; β-loading end angle; H-screw chasing tooth height; L1-cutting teeth ridge is wide; L2-cutting teeth groove width; The draft angle on b-cutting inclined-plane.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the invention provides a kind of sealing thread joint external screw thread processing alloy blade, the processing of sealing nipple external screw thread comprises the body 1 with cutting inclined-plane with alloy blade, is provided with the installation tie rod hole 16 perpendicular to processing direction of advance and horizontal plane on body 1; The draft angle b on cutting inclined-plane is 9～15 °; Cutting inclined-plane has 1～7 identical screw chasing tooth from left to right, each screw chasing tooth is followed successively by from left to right carrying transition arc 6 at the bottom of guiding transition arc 8 at the bottom of screw thread guiding cutting face 9, tooth, tooth undercutting bevel 7, tooth, carrying cutting face 5, tooth top carrying transition arc 4, tooth top cutting face 3, tooth top guiding transition arc 2 and forms, cutting leftmost guiding cutting face 9, inclined-plane is connected with the front end face 10 of body 1, the rightmost cutting teeth in cutting inclined-plane is connected with the rear end face 13 of body 1 by inclined-plane 12, and the bottom of body 1 is body bottom 11.
Screw thread guiding cutting face 9 is screw thread spigot surface angle α with the angle that front end face 10 forms, and the scope of spigot surface angle α is 40 °～60 °; Carrying cutting face 5 is screw thread loading end angle β with the angle that front end face 10 forms, and the scope of loading end angle β is-3 °～3 °; At the bottom of tooth, guiding transition arc 8 radiuses are 0.10mm～0.22mm, and at the bottom of tooth, the radius of carrying transition arc 6 is 0.13mm～0.25mm, and the radius of tooth top carrying transition arc 4 is 0.17mm～0.30mm, and the radius of tooth top guiding transition arc 2 is 0.73mm～0.88mm; The height H of the screw chasing tooth on cutting inclined-plane is 1.455mm～2.225mm; The wide L1 of cutting teeth ridge is 2.55mm～2.65mm, and cutting teeth groove width L2 is 2.45mm～2.60mm.
Cutting inclined-plane on body 1 can be set to 1～7 identical screw chasing tooth from left to right, and the stress while cutting to alleviate extends blade life, and the cutting number of teeth of concrete setting can be determined according to equipment and processing technology.
The slope of body 1 ramp 12 is 1:20～1:50, between inclined-plane 12 and rear end face 13, chamfering can be set.
Thread undercutting bevel 7 is parallel with tooth top cutting face 3, and slope is all 1:12～1:18.
Threaded blade outer surface can arrange composite coating to increase wearability.
Embodiment 1:
Spigot surface angle α is 40 °, and easily upper button guiding is stable to have advantages of make-up, and the scope of loading end angle β is-2 °, has improved the resistance to tension after upper button.At the bottom of tooth, guiding transition arc 8 radiuses are 0.195mm, at the bottom of tooth, the radius of carrying transition arc 6 is 0.20mm, the radius of tooth top carrying transition arc 4 is 0.20mm, the radius of tooth top guiding transition arc 2 is 0.75mm, the radial design of circular arc guarantees to imitate and prevents that the stress in processing and upper shackle process is concentrated, and anti-stick button also has auxiliary seal effect; Thread height H is 1.8mm, has improved screw thread tensile strength; Space width L2 is 2.5mm～2.60mm, and while detaining in assurance, thread alternating does not occur easy make-up, and the wide L1 of tooth ridge is 2.45mm～2.55mm, and in assurance, the rear loading end of button and spigot surface are gapped, and pitch is per inch 5 teeth.
Process this sealing male connection, the external screw thread processing alloy blade of use is the body 1 comprising with cutting inclined-plane, is provided with the installation tie rod hole perpendicular to processing direction of advance and horizontal plane on described body 1; The draft angle b on described cutting inclined-plane is 9 °; Cutting inclined-plane has 3 identical screw chasing teeth from left to right, and each screw chasing tooth is followed successively by from left to right carrying transition arc 6 at the bottom of guiding transition arc 8 at the bottom of screw thread guiding cutting face 9, tooth, tooth undercutting bevel 7, tooth, carrying cutting face 5, tooth top carrying transition arc 4, tooth top cutting face 3, tooth top guiding transition arc 2 and forms; Cutting leftmost guiding cutting face 9, inclined-plane is connected with the front end face 10 of body 1, and the rightmost cutting teeth in cutting inclined-plane is connected with the rear end face 13 of body 1 by inclined-plane 12, and the bottom of body 1 is body bottom 11; 14 is plane in blade body, and 15 is blade body lower plane.
Screw thread guiding cutting face 9 is that screw thread spigot surface angle α is 40 ° with the angle of the parallel lines formation of front end face 10; Carrying cutting face 5 is that screw thread loading end angle β is-2 ° with the angle of the parallel lines formation of front end face 10; At the bottom of tooth, guiding transition arc 8 radiuses are 0.193, and at the bottom of tooth, the radius of carrying transition arc 6 is 0.198mm, and the radius of tooth top carrying transition arc 4 is 0.203mm, and the radius of tooth top guiding transition arc 2 is 0.77mm; The height H of the screw chasing tooth on described cutting inclined-plane is 1.81mm; The wide L1 of cutting teeth ridge is 2.58mm, and cutting teeth groove width L2 is 2.55mm.
The slope of body 1 ramp 12 is 1:40, and thread undercutting bevel 7 is parallel with tooth top cutting face 3, and slope is all 1:16, and threaded blade outer surface is provided with composite coating to guarantee that blade is not scratched damage.
With threaded blade processes in addition Midwest oil gas field, with economical sealing male connection, parameters is all qualified after testing, and blade is installed simple, and monolithic intensity is large, long service life, and the steady quality of converted products, yield rate is high.
Claims (10)
1. a sealing thread joint external screw thread processing alloy blade, is characterized in that: described sealing thread joint external screw thread processing comprises that with alloy blade the draft angle on described cutting inclined-plane is 9～15 ° with the body on cutting inclined-plane; Described cutting inclined-plane is provided with at least one screw chasing tooth; Described screw chasing tooth comprises carrying transition arc at the bottom of guiding transition arc at the bottom of screw thread guiding cutting face, tooth, tooth undercutting bevel, tooth, carrying cutting face, tooth top carrying transition arc and tooth top cutting face; At the bottom of described screw thread guiding cutting face, tooth, at the bottom of guiding transition arc, tooth undercutting bevel, tooth, carrying transition arc, carrying cutting face, tooth top carrying transition arc and tooth top cutting face are in turn connected to form screw chasing tooth working curved surface; Described body comprises front end face and the rear end face relative with front end face that first enters duty; Described screw thread guiding cutting face is connected with the front end face of body; Described tooth top cutting face is connected with the rear end face of body.
2. sealing thread joint external screw thread processing alloy blade according to claim 1, is characterized in that: when described screw chasing tooth is a plurality of; Between described connected screw chasing tooth, by the tooth top transition arc that leads, be connected.
3. sealing thread joint external screw thread processing alloy blade according to claim 2, is characterized in that: the tooth top cutting face of the last screw chasing tooth of described adjacent two screw chasing teeth is connected with the screw thread guiding cutting face of a rear screw chasing tooth by the tooth top transition arc that leads.
4. sealing thread joint external screw thread processing alloy blade according to claim 3, is characterized in that: described cutting inclined-plane also comprises and is arranged on the tooth top cutting face of last screw chasing tooth and the inclined-plane between the rear end face of body; The tooth top cutting face of described last screw chasing tooth is connected with the rear end face of body by inclined-plane.
5. according to the sealing thread joint external screw thread processing alloy blade described in claim 1 or 2 or 3 or 4, it is characterized in that: the angle that described screw thread guiding cutting face and front end face form forms screw thread spigot surface angle α, and the scope of described screw thread spigot surface angle α is 40 °～60 °; The angle that the parallel surface of described carrying cutting face and front end face forms is screw thread loading end angle β, and the scope of described screw thread loading end angle β is-3 °～3 °.
6. sealing thread joint external screw thread processing alloy blade according to claim 5, is characterized in that: at the bottom of described tooth, guiding transition arc radius is 0.10mm～0.22mm; At the bottom of described tooth, the radius of carrying transition arc is 0.13mm～0.25mm; The radius of described tooth top carrying transition arc is 0.17mm～0.30mm; The radius of described tooth top guiding transition arc is 0.73mm～0.88mm; The height H of the screw chasing tooth on described cutting inclined-plane is 1.455mm～2.225mm; The width of the wide L1 of described cutting teeth ridge is 2.55mm～2.65mm; The width of described cutting teeth groove width L2 is 2.45mm～2.60mm.
7. sealing thread joint external screw thread processing alloy blade according to claim 6, is characterized in that: the slope on described inclined-plane is 1:20～1:50.
8. sealing thread joint external screw thread processing alloy blade according to claim 7, it is characterized in that: described thread undercutting bevel and tooth top cutting face are parallel to each other, the slope in described thread undercutting bevel and tooth top cutting face is all 1:12～1:18.
9. sealing thread joint external screw thread processing alloy blade according to claim 8, is characterized in that: between described inclined-plane and rear end face, be provided with chamfering.
10. sealing thread joint external screw thread processing alloy blade according to claim 9, is characterized in that: the outer surface of described screw chasing tooth is provided with for strengthening the composite coating of anti-wear performance; On described body, be provided with the installation tie rod hole perpendicular to processing direction of advance and horizontal plane; The quantity of described screw chasing tooth is 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219410.5A CN104028857A (en) | 2014-05-22 | 2014-05-22 | Alloy blade for machining external threads of sealing screwed joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219410.5A CN104028857A (en) | 2014-05-22 | 2014-05-22 | Alloy blade for machining external threads of sealing screwed joint |
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| CN104028857A true CN104028857A (en) | 2014-09-10 |
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| CN201410219410.5A Pending CN104028857A (en) | 2014-05-22 | 2014-05-22 | Alloy blade for machining external threads of sealing screwed joint |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT2462U1 (en) * | 1997-11-04 | 1998-11-25 | Plansee Tizit Gmbh | METHOD FOR PRODUCING A CUTTING INSERT FOR THREADING |
| CN2933676Y (en) * | 2006-08-03 | 2007-08-15 | 天津钢管集团有限公司 | Cutting tool for manufacturing hook type teeth screw |
| CN201574696U (en) * | 2009-12-10 | 2010-09-08 | 天津钢管集团股份有限公司 | Large-caliber fast screwing-up sleeve thread connecting structure |
| CN201572977U (en) * | 2009-11-23 | 2010-09-08 | 杭州雄飞冷精锻技术有限公司 | Plane screwer |
| CN103128381A (en) * | 2013-03-21 | 2013-06-05 | 昆山华辰精密工具有限公司 | Slant ladder thread machining blade of petroleum pipeline |
| CN103586550A (en) * | 2013-11-28 | 2014-02-19 | 昆山华辰精密工具有限公司 | Indexable threaded insert |
| CN203459781U (en) * | 2013-09-06 | 2014-03-05 | 成都工具研究所有限公司 | Threaded knife blade with composite edge |
| CN203992692U (en) * | 2014-05-22 | 2014-12-10 | 中国石油集团石油管工程技术研究院 | Sealing thread joint external screw thread processing alloy blade |
-
2014
- 2014-05-22 CN CN201410219410.5A patent/CN104028857A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT2462U1 (en) * | 1997-11-04 | 1998-11-25 | Plansee Tizit Gmbh | METHOD FOR PRODUCING A CUTTING INSERT FOR THREADING |
| CN2933676Y (en) * | 2006-08-03 | 2007-08-15 | 天津钢管集团有限公司 | Cutting tool for manufacturing hook type teeth screw |
| CN201572977U (en) * | 2009-11-23 | 2010-09-08 | 杭州雄飞冷精锻技术有限公司 | Plane screwer |
| CN201574696U (en) * | 2009-12-10 | 2010-09-08 | 天津钢管集团股份有限公司 | Large-caliber fast screwing-up sleeve thread connecting structure |
| CN103128381A (en) * | 2013-03-21 | 2013-06-05 | 昆山华辰精密工具有限公司 | Slant ladder thread machining blade of petroleum pipeline |
| CN203459781U (en) * | 2013-09-06 | 2014-03-05 | 成都工具研究所有限公司 | Threaded knife blade with composite edge |
| CN103586550A (en) * | 2013-11-28 | 2014-02-19 | 昆山华辰精密工具有限公司 | Indexable threaded insert |
| CN203992692U (en) * | 2014-05-22 | 2014-12-10 | 中国石油集团石油管工程技术研究院 | Sealing thread joint external screw thread processing alloy blade |
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Application publication date: 20140910 |