CN203531780U - Highly-resistant double-circular-bead oil sleeve joint - Google Patents
Highly-resistant double-circular-bead oil sleeve joint Download PDFInfo
- Publication number
- CN203531780U CN203531780U CN201320625966.5U CN201320625966U CN203531780U CN 203531780 U CN203531780 U CN 203531780U CN 201320625966 U CN201320625966 U CN 201320625966U CN 203531780 U CN203531780 U CN 203531780U
- Authority
- CN
- China
- Prior art keywords
- shoulder
- torsion
- auxiliary
- screw thread
- main moment
- Prior art date
- 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
Images
Landscapes
- Earth Drilling (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model relates to a highly-resistant double-circular-bead oil sleeve joint which comprises a coupling (1) and a pipe body (6). The highly-resistant double-circular-bead oil sleeve joint is characterized in that inner threads (2), a main torque inner circular bead (3), an inner conic face (4) and an auxiliary inner circular bead (5) are arranged on the coupling (1) from the outer end to the inner end in sequence; outer threads (7), a main torque outer circular bead (8), an outer conic face (9) and an auxiliary outer circular bead (10) are arranged on the pipe body (6) from the inner end to the outer end in sequence; when the joint is used, the coupling (1) and the pipe body (6) are tightly matched, wherein the radial interference fit and the axial interference fit are formed by the inner threads (2), the main torque inner circular bead (3), the inner conic face (4) and the auxiliary inner circular bead (5) which are all arranged on the coupling and the outer threads (7), the main torque outer circular bead (8), the outer conic face (9) and the auxiliary outer circular bead (10) which are all arranged on the pipe body. The highly-resistant double-circular-bead oil sleeve joint has the advantages of being high in torque-resistant performance and high in air sealing property.
Description
Technical field
The utility model relates to a kind of oil bushing threaded connector, relates in particular to the two shoulder oil sleeve joints of a kind of high resistance, belongs to oil pipe thread link technique field.
Background technology
At present, the joint that tubing and casing adopts is API joint normally.This joint is a kind of modular connection, according to API(American Petroleum Institute (API)) standard processing and manufacturing.Its shortcoming is:
1, moment of torsion is born by taper pipe thread (tapering is 1:16) completely, and moment of torsion is larger, and the length of external screw thread precession internal thread is just longer, until there is " thread making ", and damaged screw, so torsional property is poor;
2, after joint is tightened, between inside and outside thread engagement, have gap, cause poor sealing performance, especially gas sealing ability is poorer, can not be for the exploitation of the natural gas well.
Find by prior art documents, China Patent Publication No. is CN 2575286Y, and open day is on September 24th, 2003, and utility model patent name is called " oil, casing thread connection ", and this patent is improved above-mentioned API screw thread.This utility model is a kind of tapered thread joint, by external thread piece and inner thread piece, be threaded connection and form: its screw thread is improved buttress thread, external thread piece front end has one column sealed, beyond the screw thread of inner thread piece, have a protruding ball face sealing face, cylinder and sphere interference fit form primary seal part.External thread piece front end changes into-9 ° or-15 ° of angles, forms secondary hermetic unit with-9 ° of inner thread piece or-15 ° of shoulder interference fit.Compare with API joint, this patent is owing to having designed the shape metallic leak-proof structure of cylinder/sphere form, and sealing performance improves, and simultaneously owing to having increased torque shoulder, torsional property also increases.
Its weak point is to only have a torque shoulder, and torsional property increase rate is large not.Certainly, the thickness that increases torque shoulder also can improve its torsional property.But the sealing of joint is that elasticity interference fit inner, external seal face realizes, the metal sealing contact area of cylinder/sphere form is less, and the resistance of deformation of generation is also less.If increase shoulder thickness, will inevitably cause sealing contact position tube wall too thick, be difficult to occur elastic deformation, and then damage sealing surface, so this method be infeasible.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of oil sleeve joint with high torsional property, high gas sealing ability is provided, and is adapted at using in horizontal well under marine drilling environment, extended reach well.
The purpose of this utility model is achieved in that
The two shoulder oil sleeve joints of a kind of high resistance, it comprises box cupling and body, on described box cupling, from outer end, inwardly set gradually internal thread, shoulder in main moment of torsion, inner conical surface and auxiliary interior shoulder, on described body, from inside to outside end sets gradually external screw thread, the outer shoulder of main moment of torsion, male cone (strobilus masculinus) and auxiliary outer shoulder, when joint uses, box cupling and body closely cooperate, wherein, internal thread on box cupling, shoulder in main moment of torsion, inner conical surface and auxiliary in shoulder respectively with body on external screw thread, the outer shoulder of main moment of torsion, male cone (strobilus masculinus) and auxiliary outer shoulder form radial interference fit and axial interference fit.In main moment of torsion, first shoulder contacts with the outer shoulder of main moment of torsion, and after main torque shoulder generation elastic deformation, auxiliary interior shoulder starts to contact with auxiliary outer shoulder.
The thickness of shoulder is t3 in main moment of torsion, auxiliary in the thickness of shoulder be t2, the thickness of the outer shoulder of main moment of torsion is t1, the thickness of auxiliary outer shoulder is t2, t1=2.5mm wherein, t3=t1+(0.2～0.4) mm, t2=2.5～5.5mm.
Internal thread and external screw thread are all taper pipe threads, tapering 1:16, and screw thread form is for partially trapezoidal, α=10 °, spigot surface angle, β=3 °, bearing surface angle, internal thread and external screw thread adopt same pitch P, internal thread tooth depth h1, external screw thread tooth depth h2, according to specification difference, different pitch P and tooth depth h1, h2 are set, concrete numerical value is as follows: during 60.3≤OD≤101.6mm, and P=4.233mm, h1=1.35mm, h2=1.10mm; During 101.6 <OD≤355.6mm, P=5.08mm, h1=1.87mm, h2=1.57mm.
The shoulder of the outer shoulder of main moment of torsion and auxiliary outer shoulder is right angle shoulder form, and the tapering of inner conical surface is T2=1:8.5, and the tapering T1 of male cone (strobilus masculinus) is 1:10.
Compared with prior art, the beneficial effects of the utility model are:
1, be provided with two torque shoulder, moment of torsion is shared by two shoulders, has reduced stress and has concentrated, and has significantly improved the anti-twisting property of joint.
2, the length of sealing cone is longer, makes the elastic deformability of conical surface sealing structure better, has improved the hermetic seal effect of joint.
Therefore the utlity model has the advantage of high torsional property, high gas sealing ability, be adapted at using in horizontal well under marine drilling environment, extended reach well.
Accompanying drawing explanation
Fig. 1 is the structural representation of the two shoulder oil sleeve joints of the utility model high resistance.
Fig. 2 is the two inner conical surfaces of shoulder oil sleeve joint of the utility model high resistance and the structural representation of male cone (strobilus masculinus).
Fig. 3 is internal thread and the external screw thread syndeton schematic diagram of the two shoulder oil sleeve joints of the utility model high resistance.
Wherein:
Shoulder 3, inner conical surface 4, auxiliary interior shoulder 5 in box cupling 1, internal thread 2, main moment of torsion, described body 6, external screw thread 7, the outer shoulder 8 of main moment of torsion, male cone (strobilus masculinus) 9, auxiliary outer shoulder 10
Shoulder thickness t 3, pitch P, spigot surface angle α, bearing surface angle β, internal thread tooth depth h1, external screw thread tooth depth h2 in inner conical surface tapering T1, male cone (strobilus masculinus) tapering T2, the outer shoulder thickness t 1 of main moment of torsion, auxiliary outer shoulder and auxiliary interior shoulder thickness t 2, main moment of torsion.
The specific embodiment
Referring to Fig. 1 ~ Fig. 3, the two shoulder oil sleeve joints of a kind of high resistance that the utility model relates to, being as general as taper pipe thread connects, its tapering is 1:16, it comprises box cupling 1 and body 6, on described box cupling 1, from outer end, inwardly set gradually internal thread 2, shoulder 3 in main moment of torsion, inner conical surface 4 and auxiliary interior shoulder 5, on described body 6, from inside to outside end sets gradually external screw thread 7, the outer shoulder 8 of main moment of torsion, male cone (strobilus masculinus) 9 and auxiliary outer shoulder 10, when joint uses, box cupling 1 closely cooperates with body 6, wherein, internal thread 2 on box cupling, shoulder 3 in main moment of torsion, inner conical surface 4 and auxiliary in shoulder 5 respectively with body on external screw thread 7, the outer shoulder 8 of main moment of torsion, male cone (strobilus masculinus) 9 and auxiliary outer shoulder 10 form radial interference fit and axial interference fit.In main moment of torsion, first shoulder 3 contacts with the outer shoulder 8 of main moment of torsion, bears torque wrench moment, and when main torque shoulder occurs after certain elastic deformation, auxiliary interior shoulder 5 starts to contact with auxiliary outer shoulder 10, bears unnecessary torque wrench moment.
In order to increase the torsional strength of joint, on box cupling 1, be processed with two torque shoulder, rather than one, wherein in main moment of torsion, the thickness of shoulder 3 is t3, the thickness of auxiliary interior shoulder 5 is t2; On body 6, be also processed with two torque shoulder, wherein the thickness of the outer shoulder 8 of main moment of torsion is t1, and the thickness of auxiliary outer shoulder 10 is t2.T1=2.5mm wherein, t3=t1+(0.2～0.4) mm, t2=2.5～5.5mm.
Internal thread 2 and external screw thread 7 are all taper pipe threads, tapering 1:16, and screw thread form is for partially trapezoidal, α=10 °, spigot surface angle, β=3 °, bearing surface angle.This screw thread is easy to processing and detects, and processing cost is low.Internal thread 2 and external screw thread 7 adopt same pitch P, but the tooth depth of internal thread 2 and external screw thread 7 is slightly variant, internal thread tooth depth h1, external screw thread tooth depth h2, arranges different pitch P and tooth depth h1, h2 according to specification (external diameter represents with OD) difference, concrete numerical value is as follows: during 60.3≤OD≤101.6mm, P=4.233mm, h1=1.35mm, h2=1.10mm; During 101.6 <OD≤355.6mm, P=5.08mm, h1=1.87mm, h2=1.57mm.Therefore, this screw thread is not only applicable to sleeve pipe, is also applicable to oil pipe, has good switching performance.
Meanwhile, in main moment of torsion shoulder 3 and auxiliary in be processed with inner conical surface 4 between shoulder 5, outside main moment of torsion shoulder 8 and assist outside be processed with male cone (strobilus masculinus) 9 between shoulder 10.Length 7mm～the 15mm of sealing cone, compares with sphere/cylinder hermetically-sealed construction, and conical surface seal can produce larger distortion under same contact, makes the elastic deformability of this structure better, and joint has good hermetic seal effect.
The two shoulder oil sleeve joints of this kind of high resistance are named as: DL-JSCC.
First embodiment of the design is the oil pipe for Ф 88.9 * 7.34 mm, and grade of steel is C95.The physical dimension of box cupling and body comprises that external diameter, wall thickness etc. all adopt standard value, tubing material meets the requirement of API standard to C95 steel level oil conduit material, its internal thread and external screw thread all adopt 6 tooth buttress threads, pitch P=4.233mm, internal thread tooth depth h1=1.35mm, external screw thread tooth depth h2=1.10mm, thread taper is 1:16, in main moment of torsion, the thickness of shoulder is t3=2.8mm, and the thickness of auxiliary interior shoulder is t2=3.2mm; On body, the thickness of the outer shoulder of main moment of torsion is t1=2.5mm, and the thickness of auxiliary outer shoulder is t2=3.2mm.Shoulder is right angle shoulder form, and the tapering of inner conical surface hermetically-sealed construction is T2=1:8.5, and the tapering T1 of male cone (strobilus masculinus) hermetically-sealed construction is 1:10.For the API oil pipe of same specification, grade of steel, its maximum permission torque wrench moment is 4690N-m, and the maximum torque wrench moment that allows of the present utility model can reach 14100N-m.Meanwhile, joint bonding strength is greater than body, more than hermetic seal ability reaches 94Mpa.
Second embodiment of the design is the sleeve pipe for Ф 177.8 * 10.36 mm, and grade of steel is N80.The physical dimension of box cupling and body comprises that external diameter, wall thickness etc. all adopt standard value, shell material meets the requirement of API standard to N80 steel-grade bushing material, its internal thread and external screw thread all adopt 5 tooth buttress threads, pitch P=5.08mm, internal thread tooth depth h1=1.87mm, external screw thread tooth depth h2=1.57mm, thread taper is 1:16, in main moment of torsion, the thickness of shoulder is t3=2.8mm, and the thickness of auxiliary interior shoulder is t2=3.5mm; On body, the thickness of the outer shoulder of main moment of torsion is t1=2.5mm, and the thickness of auxiliary outer shoulder is t2=3.5mm.Shoulder is right angle shoulder form, and the tapering of inner conical surface hermetically-sealed construction is T2=1:8.5, and the tapering T1 of male cone (strobilus masculinus) hermetically-sealed construction is 1:10.For the API sleeve pipe of same specification, grade of steel, its maximum permission torque wrench moment is 10300N-m, and the maximum torque wrench moment that allows of the present utility model can reach 31000N-m.Meanwhile, joint bonding strength is greater than body, more than hermetic seal ability reaches 56Mpa.
Claims (4)
1. two shoulder oil sleeve joints of a high resistance, it comprises box cupling (1) and body (6), it is characterized in that the upper internal thread (2) that inwardly sets gradually from outer end of described box cupling (1), shoulder (3) in main moment of torsion, inner conical surface (4) and auxiliary interior shoulder (5), on described body (6), from inside to outside end sets gradually external screw thread (7), the outer shoulder (8) of main moment of torsion, male cone (strobilus masculinus) (9) and auxiliary outer shoulder (10), when joint uses, box cupling (1) closely cooperates with body (6), wherein, internal thread on box cupling (2), shoulder (3) in main moment of torsion, inner conical surface (4) and auxiliary in shoulder (5) respectively with body on external screw thread (7), the outer shoulder (8) of main moment of torsion, male cone (strobilus masculinus) (9) and auxiliary outer shoulder (10) form radial interference fit and axial interference fit, in main moment of torsion, shoulder (3) first contacts with the outer shoulder (8) of main moment of torsion, after main torque shoulder generation elastic deformation, in auxiliary, shoulder (5) starts to contact with auxiliary outer shoulder (10).
2. two shoulder oil sleeve joints of a kind of high resistance according to claim 1, the thickness that it is characterized in that shoulder (3) in main moment of torsion is t3, in auxiliary, the thickness of shoulder (5) is t2, the thickness of the outer shoulder (8) of main moment of torsion is t1, the thickness of auxiliary outer shoulder (10) is t2, t1=2.5mm wherein, t3=t1+(0.2～0.4) mm, t2=2.5～5.5mm.
3. two shoulder oil sleeve joints of a kind of high resistance according to claim 1, it is characterized in that internal thread (2) and external screw thread (7) are all taper pipe threads, tapering 1:16, screw thread form is for partially trapezoidal, α=10 °, spigot surface angle, β=3 °, bearing surface angle, internal thread (2) and external screw thread (7) adopt same pitch P, internal thread tooth depth h1, external screw thread tooth depth h2, arranges different pitch P and tooth depth h1, h2 according to specification difference, concrete numerical value is as follows: during 60.3≤OD≤101.6mm, P=4.233mm, h1=1.35mm, h2=1.10mm; During 101.6 <OD≤355.6mm, P=5.08mm, h1=1.87mm, h2=1.57mm.
4. two shoulder oil sleeve joints of a kind of high resistance according to claim 1, the shoulder that it is characterized in that the outer shoulder (8) of main moment of torsion and auxiliary outer shoulder (10) is right angle shoulder form, the tapering of inner conical surface (4) is T2=1:8.5, and the tapering T1 of male cone (strobilus masculinus) (9) is 1:10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625966.5U CN203531780U (en) | 2013-10-11 | 2013-10-11 | Highly-resistant double-circular-bead oil sleeve joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625966.5U CN203531780U (en) | 2013-10-11 | 2013-10-11 | Highly-resistant double-circular-bead oil sleeve joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531780U true CN203531780U (en) | 2014-04-09 |
Family
ID=50418002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320625966.5U Expired - Fee Related CN203531780U (en) | 2013-10-11 | 2013-10-11 | Highly-resistant double-circular-bead oil sleeve joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110529055A (en) * | 2019-08-30 | 2019-12-03 | 江苏璞腾油气装备有限公司 | A kind of high antitorque air-tight oil casing nipple |
-
2013
- 2013-10-11 CN CN201320625966.5U patent/CN203531780U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110529055A (en) * | 2019-08-30 | 2019-12-03 | 江苏璞腾油气装备有限公司 | A kind of high antitorque air-tight oil casing nipple |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202946041U (en) | Zigzag air-sealed oil well pipe thread joint structure | |
| CN203531777U (en) | High-quality airtight seal oil casing threaded joint | |
| CN101824969A (en) | Double-shoulder double-sealing face screwed nipple and collar-free oil well pipe using same | |
| CN103628827B (en) | Anti-stick button three grades of end plane metal sealing titanium compo pipe nipples | |
| CN201723179U (en) | Air-tight oil casing nipple | |
| CN201763269U (en) | Double-shoulder double-seal surface threaded connector and collar-free oil well pipe adopting same | |
| CN200992958Y (en) | Dual shoulder anti-torsion joint | |
| CN101839379A (en) | Threaded connection method of steel tubes | |
| CN203531780U (en) | Highly-resistant double-circular-bead oil sleeve joint | |
| CN201013257Y (en) | Oil pipe coupling | |
| CN202125258U (en) | Oil sleeve connector with high sealing performance and thread-gluing resistance | |
| CN202081837U (en) | Stress-resistant threaded connector with corrosive gas sealing sleeve | |
| CN104060946A (en) | Ultrahigh torsion-resistance metal airtight drill rod joint | |
| CN203614052U (en) | Self-locking threaded joint | |
| CN203403832U (en) | Air-tight seal screwed joint | |
| CN101899953A (en) | Thread joint structure for high-performance oil casing | |
| CN203403833U (en) | Trapezoidal thread connector with tangency point sealing structure | |
| CN203403831U (en) | Direct-connecting oil casing pipe threaded connector | |
| CN202788653U (en) | Hermetic seal thread connection device used for SEW oil casings | |
| CN204040938U (en) | A kind of Oil/gas Well thimble assembly | |
| CN203188922U (en) | Hermetic seal buckle profile | |
| CN201943592U (en) | Novel external thickening oil pipe and sleeve | |
| CN204299493U (en) | Two rank air-tight oil casing nipple | |
| CN105298411A (en) | Sleeve joint structure | |
| CN202832262U (en) | Sleeve joint with pace |
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: 20140409 Termination date: 20141011 |
|
| EXPY | Termination of patent right or utility model |