CN108301786A - A kind of special thread buckle joint - Google Patents
A kind of special thread buckle joint Download PDFInfo
- Publication number
- CN108301786A CN108301786A CN201810319628.6A CN201810319628A CN108301786A CN 108301786 A CN108301786 A CN 108301786A CN 201810319628 A CN201810319628 A CN 201810319628A CN 108301786 A CN108301786 A CN 108301786A
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- thread
- conical surface
- pin
- tooth
- internal
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- 238000007789 sealing Methods 0.000 claims abstract description 50
- 230000007704 transition Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 210000002445 nipple Anatomy 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining 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
- 230000008569 process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Abstract
The present invention is a kind of special thread buckle joint, includes female thread and pin thread with metal-contacting surface, and metal-contacting surface includes threaded portions contact and the contact of non-threaded place.Threaded portions contact include female thread internal thread tooth top contacted with pin thread external screw thread tooth bottom and the loading end of internal and external screw thread tooth contact.Non-threaded place's contact includes the step surface contact of the first taper-face contact and internal and external screw thread of the contact of internal and external screw thread sealing surface and internal and external screw thread.After nipple is tightened, internal and external threads sealing surface forms interference fit, plays sealing function.In the present invention, it is separated by a distance by improved screw thread dental structure and sealing surface position and step surface, compared with prior art, the present invention collects high bonding strength, high incompressible, high torque resistant, high bending and high temperature resistance contour can be in one, and facilitate live practical operation, reduce the improper production time of Party A company.
Description
Technical field
It is a kind of modified buttress thread and sealing surface position and platform the present invention relates to a kind of special thread buckle joint
Terrace high-performance special thread buckle joint separated by a distance, it is suitable for oil and gas industries especially to tube connector
Comprehensive performance requires in higher oil/gas well.
Background technology
In recent years, as the exploitation difficulty of conventional oil gas well is increasing and the increase year by year of unconventionaloil pool yield,
And the test mining of the energy such as hot lava well and combustible ice, thus the comprehensive performance of tube connector is required higher and higher.
Existing API (American Petroleum Institute) nipples and other various Premium connections can only all meet one of which
Or a few high-performance, such as high tensile, height is incompressible or has high tensile simultaneously, and height is antitorque etc., this also allows for oil gas
Well casing material manufacturing company requires to need to design different joint structures for scene is different.Therefore urgent need exploitation is a kind of to expire simultaneously
Sufficient high tensile, high incompressible, high antitorque, high bending, high temperature resistance contour can be in the special thread buckle joint of one.
The gas industries downturn period of recent years, current various Premium connections application stage at the scene, since design is tied
The reason of structure, sealing cone are often damaged by external hard substance, and during make-up, since eccentric thread alternating causes upper
Thread is worn in button rundown process.Therefore a kind of new special thread snapping header structure need to be designed, avoided as possible existing
The field application stage goes wrong and increases the improper operation time of oil-gas exploration exploitation company.
Invention content
The object of the present invention is to provide a kind of special thread buckle joints, are provided simultaneously with high tensile, high incompressible, high antitorque,
High bending, high temperature resistance contour can be in the special thread buckle joint of one, and is convenient for execute-in-place, reduces product and is damaged
Hinder and increase the improper operation time of Party A company.
To achieve the above object, the technical scheme is that：
A kind of special thread buckle joint, including female thread and pin thread, female thread structure include internal thread segment and non-threaded section, pin thread
Structure includes external thread section and non-threaded section；It is characterized in that female thread internal thread segment screw thread dental structure is buttress thread tooth, it is non-
Thread segment includes sealing cone, first conical surface and second conical surface and interior step surface, and non-threaded section passes through between internal thread segment
Cylindrical surface rounding off；Pass through fillet slot rounding off between step surface and non-threaded section；
The female thread internal thread segment thread includes tooth top, bottom of the tooth, guide surface and loading end, and the tooth top, bottom of the tooth are flat
Row is in body central axis, the loading end angle φ2It is 1 ° -4 °, the guide surface angle φ1It it is 10 ° -15 °, described
Guide surface is machined with 20 ° -40 ° of chamfering φ；
Pin thread external thread section screw thread dental structure is buttress thread tooth, and non-threaded section includes sealing cone, second conical surface, the
One conical surface and step surface.
The female thread internal thread segment screw thread is adapted with the pin thread external thread section screw thread, and the pin thread is spirally connected completely to be inserted in
After the female thread, first conical surface of female thread and the first taper-face contact of pin thread, female thread sealing cone (5) are contacted with pin thread sealing cone；
The pin thread external thread section thread includes tooth top, bottom of the tooth, guide surface and loading end, and the tooth top, bottom of the tooth are flat
Row is in body central axis, the loading end angle φ4It is 1 ° -4 °, the guide surface angle φ3It is 10 ° -15 °.
The thread taper of the female thread internal thread segment and the pin thread external thread section (III) is 1；20-1：17.
Thread number is per inch 4-6 teeth.
The sealing cone taper angle theta of non-threaded section of the female thread1It is 7 ° -15 °, the taper angle theta of second conical surface3For 1.43 °-
1.79 °, the cone angle beta of first conical surface1It is 15 ° -25 °, the cylindrical surface wall thickness T between thread segment and non-threaded section1More than or equal to interior spiral shell
Line section screw thread terminates screw thread tooth root to the thickness T of outer wall2；
The sealing cone taper angle theta of non-threaded section of the pin thread2It is 7 ° -15 °, the taper angle theta of second conical surface4For 1.43 °-
1.79 °, the cone angle beta of first conical surface2It is 15 ° -25 °；Step surface angle [alpha]2In 0 ° -15 ° of opposing angular, step surface to sealing cone
The distance between L2For 8-14mm.
The radius of corner of transition circle chamfered groove is 0.6-1.0mm between step surface and non-threaded section in the female thread；Interior step
Face angle [alpha]1In 0 ° -15 ° of opposing angular, the distance between interior step surface to sealing cone L1For 10-15mm.
The pin thread sealing cone is in screw thread the first tooth contact point and first conical surface (11), the second conical surface interface point
The lower section of b lines H, vertical range h are less than 1.2mm.
The skewed slot total surface area that the pin thread is processed on first conical surface is less than first conical surface surface area
30%, the skewed slot total surface area processed on the step surface is less than the 30% of the step surface surface area.
The pin thread is spirally connected completely be inserted in the female thread after, first conical surface of the female thread and the first taper-face contact of the pin thread
Interference volume 0.35-1.2mm, the female thread sealing cone are 0.33-1.14mm with pin thread sealing cone contact interference volume.
The advantage of the invention is that：It is that a kind of modified buttress thread and sealing surface position are separated by centainly with step surface
The high-performance special thread buckle joint of distance passes through the change and first to screw thread dental structure improvement and sealing cone position
The difference of the contact interference volume and sealing cone interference volume of the conical surface reaches collection high tensile, high incompressible, high antitorque, high bending,
High temperature resistance contour can be in the goal of the invention of one, and facilitates live practical operation, reduces product during operation by outer
In the damage of factor, the improper operation time of oil-gas exploration exploitation company is advantageously reduced.
Description of the drawings
The fit structure schematic diagram of female thread A and pin thread B in Fig. 1 present invention；
The structural schematic diagram of female thread A in Fig. 2 present invention；
The enlarged structure schematic diagram of non-threaded section of female thread A in Fig. 3 present invention；
The enlarged structure schematic diagram of female thread A internal thread segments in Fig. 4 present invention；
The structural schematic diagram of pin thread B in Fig. 5 present invention；
The enlarged structure schematic diagram of non-threaded section of pin thread B in Fig. 6 present invention；
The enlarged structure schematic diagram of pin thread B external thread sections in Fig. 7 present invention；
The structural schematic diagram of non-threaded section of groove of pin thread B in Fig. 8 present invention.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
A kind of special thread buckle joint according to the present invention, such as Fig. 1, including female thread A and pin thread B, such as Fig. 2, female thread A knots
Structure includes internal thread segment II and non-threaded section of I, is buttress thread tooth in II screw thread dental structure of female thread A internal thread segments, non-threaded
Section I includes sealing cone 5, first conical surface 3 and second conical surface 4 and interior step surface 1, between non-threaded section of I and internal thread segment II
Pass through 21 rounding off of cylindrical surface；By 2 rounding off of fillet slot between step surface and non-threaded section of I, occur for first conical surface
Plastic deformation provides space, and connector is bearing high temperature or high pressure or even high temperature is held the combined load of load and axial high pressure and made
When under, increase entire compression contracting and the high temperature resistant property of connector.
Such as Fig. 5, pin thread B structure includes external thread section III and non-threaded section IV, in III screw thread dental structure of pin thread B external thread sections
It is buttress thread tooth, non-threaded section IV includes sealing cone 13, second conical surface 12, first conical surface 11 and step surface 10.
Pin thread B and female thread A are both provided with second conical surface, increase sealing surface at a distance from step surface, can reduce external hard
Substance encounters the possibility of sealing surface, while ensureing after box and pin is tightened, and the radial stress generated when step surface being made to contact is equal
Even distribution improves the bending resistance of connector.
Such as Fig. 1, II screw thread of female thread internal thread segment is adapted with III screw thread of pin thread B external thread sections, practical operation
In, pin thread B is first inserted in female thread A by make-up device, first uses the slow-speed of revolution to screw in 2 circle left and right after hitch, then uses 15 circles every
The rotating speed of or so minute screws in until when last 1-2 is enclosed, and is further threaded into precalculated position with the rotating speed per minute less than 5 circles；
After the pin thread B is spirally connected completely is inserted in the female thread A, first conical surfaces of female thread A 3 are contacted with first conical surfaces of pin thread B 11, female thread A
Sealing cone 5 is contacted with pin thread B sealing cones 13；Wherein, first conical surfaces of female thread A 3 connect with first conical surfaces of pin thread B 11
Interference volume 0.35-1.2mm is touched, the female thread A sealing cones 5 are 0.33- with the pin thread B sealing cones 13 contact interference volume
1.14mm, in practice, since the outer tube diameter size range of screw thread buckle joint is 127mm-355.6mm, different contact interference
Metering pin is to different outer tube diameter sizes.The contact interference volume of first conical surface is more than the contact interference volume of sealing surface so that connector
When bearing high temperature and axial high compression loads, the first conical surface elder generation sealing surface is plastically deformed, to improve the anti-of connector
High temperature and anti-compression properties.
Such as Fig. 4, II thread of female thread A internal thread segments includes tooth top 7, bottom of the tooth 9, guide surface 8 and loading end 6, institute
State tooth top 7, bottom of the tooth 9 is parallel to body central axis, increase the anti-compression properties of connector.6 angle φ of the loading end2For
1 ° -4 °, preferred angle is 3 °, 8 angle φ of the guide surface1It it is 10 ° -15 °, preferred angle is 12 °, in the guiding
It is 30 ° that, which there are 20 ° -40 ° of chamfering φ, preferred angle in face 8, makes connector will not thread alternating during make-up；Thread taper is 1；
20-1：17, preferred taper is 1：17.5, thread number is per inch 4-6 teeth.
Such as Fig. 6, III thread of pin thread B external thread sections includes tooth top 19, bottom of the tooth 17, guide surface 18 and loading end
16, the tooth top 19, bottom of the tooth 17 are parallel to body central axis, 16 angle φ of the loading end4It is 1 ° -4 °, preferred angle
It is 3 °, 18 angle φ of the guide surface3It it is 10 ° -15 °, preferred angle is 12 °, and thread taper is 1；20-1：17, it is excellent
The taper of choosing is 1：17.5, thread number is per inch 4-6 teeth.
Such as Fig. 3,5 taper angle theta of sealing cone of the non-threaded section of I of female thread A1It it is 7 ° -15 °, different cone angles is for difference
Tube body wall thickness, the taper angle theta of second conical surface 43It is 1.43 ° -1.79 °, the cone angle beta of first conical surface 31It is 15 ° -25 °, preferred angle
Degree is 20 °, the 21 wall thickness T of cylindrical surface between thread segment II and non-threaded section of I1Terminate thread more than or equal to internal thread segment screw thread
Thickness T of the tooth root to outer wall2, it is preferred that internal thread segment screw thread terminates screw thread tooth root to the thickness T of outer wall2Less times greater than tube body
Wall thickness T.
The angle γ of line is 30 ° -45 ° between sealing cone 5 and cylindrical surface 21, which is internal thread segment II
With the connection space of non-threaded section of I, exiting for screwer provides space when being machining internal thread, and screwer is avoided to encounter sealed taper
Face.Simultaneously ensure internal thread segment screw thread terminate locate screw thread tooth root to outer wall thickness less times greater than tube body wall thickness T, to ensure
The tensile strength of the connector is more than the tensile strength of tube body.
The radius of corner of transition circle chamfered groove 2 is 0.6-1.0mm between step surface 1 and non-threaded section of I in the female thread A；More
Preferred radius of corner is 0.9mm, is conducive to select suitable tool sharpening, ensures the fillet slot and the round and smooth mistake of interior step surface
It crosses；1 angle [alpha] of interior step surface1In 0 ° -15 ° of opposing angular, pass through 2 round and smooth mistake of fillet slot between interior step surface 1 and first conical surface 3
Cross connection, the effect of the fillet slot 2 be when connector bears compression or high temperature load, be 10 ° -30 ° of first conical surface 3 by
To excessive load, the yield deformation generated and the deformation of creep provide space；Also increase by one between interior step surface 1 and sealing cone 5
Section second conical surface, 4 (taper angle theta3It is 1.43 ° -1.79 °) structure, form interior standoff distance between step surface 1 and sealing cone 5
L110-15mm.
Such as Fig. 7,13 taper angle theta of sealing cone of non-threaded section IV of the pin thread B2It it is 7 ° -15 °, different cone angles is not for
Same tube body wall thickness, the taper angle theta of second conical surface 124It is 1.43 ° -1.79 °, the cone angle beta of first conical surface 11215 ° -25 °, preferably
Angle is 20 °；10 angle [alpha] of step surface2In 0 ° -15 ° of opposing angular, the distance between step surface 10 to sealing cone 13 L2For 8-
14mm；It is concordant with female thread endoporus 20 in the endoporus 14 that port bores, avoid tube fluid from forming turbulent flow at this.Endoporus 14 and pipe
Internal wall seamlessly transits 15.
The pin thread B sealing cones 13 are in screw thread the first tooth contact point a and are handed over first conical surface 11, second conical surface 12
The lower section of contact b lines H, vertical range h are less than 1.2mm.
Compared with prior art, the present invention passes through the change to screw thread dental structure improvement and sealing cone position, Yi Ji
The difference of the contact interference volume and sealing cone interference volume of one conical surface reaches collection high tensile, high incompressible, high antitorque, high bending resistance
Song, high temperature resistance contour can be in the goals of the invention of one, with identical material (grade of steel P110), identical size (outer tube diameter
177.8mm, internal diameter of tube body 157.08mm) comparison, resistance to compression raising 30%, bendability raising 32%, high temperature resistant property improves
40%, highest can tolerate temperature up to 220 DEG C, and torque wrench moment improves nearly 3400N.M.
Such as Fig. 8, a few road skewed slots are processed on first, second conical surface and step surface of the pin thread B respectively, effect is when existing
After field operator smears excessive dope, be conducive to squeeze out excessive dope during upper button.On first conical surface 11
The skewed slot 11-1 total surface areas of processing are less than the 30% of first conical surface, 11 surface area, skewed slot quantity 2-4；The step
The skewed slot 10-1 total surface areas processed on face 10 are less than the 30% of 10 surface area of the step surface, skewed slot quantity 2-4.If
Skewed slot surface area is excessive, then can influence the incompressible and torsional property of the special thread buckle joint.The effect of the skewed slot simultaneously
It is to ensure that connector is tightened the space formed between second conical surface of later box and pin and kept unimpeded with tube body endoporus.
It is only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention in summary.It is i.e. all
Equivalent changes and modifications made by content according to scope of the present invention patent all should be the technology scope of the present invention.
Claims (8)
1. a kind of special thread buckle joint, including female thread (A) and pin thread (B), female thread (A) structure includes internal thread segment (II) and non-
Thread segment (I), pin thread (B) structure include external thread section (III) and non-threaded section (IV)；It is characterized in that female thread (A) internal thread segment
(II) screw thread dental structure is buttress thread tooth, and non-threaded section (I) includes sealing cone (5), first conical surface (3) and the second cone
Face (4) and interior step surface (1) pass through cylindrical surface (21) rounding off between non-threaded section (I) and internal thread segment (II)；Step surface
Pass through fillet slot (2) rounding off between non-threaded section (I)；
Female thread (A) internal thread segment (II) thread includes tooth top (7), bottom of the tooth (9), guide surface (8) and loading end (6),
The tooth top (7), bottom of the tooth (9) are parallel to body central axis, loading end (6) angle φ2It is 1 ° -4 °, the guide surface
(8) angle φ1It is 10 ° -15 °, 20 ° -40 ° of chamfering φ is machined in the guide surface (8)；
Pin thread (B) external thread section (III) screw thread dental structure is buttress thread tooth, non-threaded section (IV) include sealing cone (13),
Second conical surface (12), first conical surface (11) and step surface (10).
Female thread (A) internal thread segment (II) screw thread is adapted with the pin thread (B) external thread section (III) screw thread, the pin thread
(B) it is spirally connected completely after being inserted in the female thread (A), first conical surface of female thread (A) (3) is contacted with first conical surface of pin thread (B) (11), female thread
(A) sealing cone (5) is contacted with pin thread (B) sealing cone (13)；
Pin thread (B) external thread section (III) thread includes tooth top (19), bottom of the tooth (17), guide surface (18) and loading end
(16), the tooth top (19), bottom of the tooth (17) are parallel to body central axis, loading end (16) angle φ4It is 1 ° -4 °, institute
State guide surface (18) angle φ3It is 10 ° -15 °.
2. special thread buckle joint as described in claim 1, it is characterised in that：Female thread (A) internal thread segment (II) and institute
The thread taper for stating pin thread (B) external thread section (III) is 1；20-1：17.
3. special thread buckle joint as claimed in claim 2, it is characterised in that：Thread number is per inch 4-6 teeth.
4. special thread buckle joint as described in claim 1, it is characterised in that：The sealing of the female thread (A) non-threaded section (I)
The conical surface (5) taper angle theta1It is 7 ° -15 °, the taper angle theta of second conical surface (4)3It is 1.43 ° -1.79 °, the cone angle beta of first conical surface (3)1For
15 ° -25 °, cylindrical surface (21) wall thickness T between thread segment (II) and non-threaded section (I)1Terminate more than or equal to internal thread segment screw thread
Thickness T of the screw thread tooth root to outer wall2；
Sealing cone (13) taper angle theta of the pin thread (B) non-threaded section (IV)2It is 7 ° -15 °, the taper angle theta of second conical surface (12)4For
1.43 ° -1.79 °, the cone angle beta of first conical surface (11)2It is 15 ° -25 °；Step surface (10) angle [alpha]2In 0 ° -15 ° of opposing angular, platform
Terrace is to the distance between sealing cone L2For 8-14mm.
5. special thread buckle joint as described in claim 1, it is characterised in that：The interior step surface of the female thread (A) (1) and non-spiral shell
The radius of corner of transition circle chamfered groove (2) is 0.6-1.0mm between line section (I)；Interior step surface (1) angle [alpha]1In opposing angular
0 ° -15 °, the distance between interior step surface (1) to sealing cone (5) L1For 10-15mm.
6. special thread buckle joint as described in claim 1, it is characterised in that：Pin thread (B) sealing cone (13) is in
The first tooth contact point (a) of screw thread and first conical surface (11), the lower section of second conical surface (12) interface point b lines H, vertical range
H is less than 1.2mm.
7. special thread buckle joint as claimed in claim 6, it is characterised in that：The pin thread (B) is in first conical surface
(11) skewed slot (11-1) total surface area processed on is less than the 30% of first conical surface (11) surface area, the step surface (10)
Skewed slot (10-1) total surface area of upper processing is less than the 30% of the step surface (10) surface area.
8. special thread buckle joint as described in claim 1, it is characterised in that：The pin thread (B) be spirally connected completely be inserted in it is described
After female thread (A), first conical surface of female thread (A) (3) and first conical surface of the pin thread (B) (11) contact interference volume 0.35-
1.2mm, female thread (A) sealing cone (5) are 0.33- with the pin thread (B) sealing cone (13) contact interference volume
1.14mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319628.6A CN108301786B (en) | 2018-04-11 | Special thread-locking joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810319628.6A CN108301786B (en) | 2018-04-11 | Special thread-locking joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108301786A true CN108301786A (en) | 2018-07-20 |
| CN108301786B CN108301786B (en) | 2024-04-19 |
Family
ID=
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|---|---|---|---|---|
| DE3927436A1 (en) * | 1989-04-28 | 1990-10-31 | Rautenkranz Int Hermann | Tensile pipe connection for shaft conveyor pipes - includes thread free centring spaces between connecting sleeve and pipe |
| CN2700542Y (en) * | 2004-06-10 | 2005-05-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special casing joint for thermal production well |
| CN2731065Y (en) * | 2004-05-21 | 2005-10-05 | 中国石油天然气集团公司 | Air sealed threaded sleeve joint |
| CN101307845A (en) * | 2008-07-11 | 2008-11-19 | 江苏常宝钢管股份有限公司 | Oil conduit screwed connection structure |
| CN201288903Y (en) * | 2008-09-28 | 2009-08-12 | 上海海隆石油管材研究所 | Oil sleeve screwed connection head of negative bearing angle |
| CN201496000U (en) * | 2009-08-20 | 2010-06-02 | 四川华工石油钢管有限责任公司 | Structure of hermetically sealed joint of oil pipe or sleeve |
| CN201502335U (en) * | 2009-10-05 | 2010-06-09 | 胜利油田胜机石油装备有限公司 | Oil sleeve joint |
| CN201507731U (en) * | 2009-06-05 | 2010-06-16 | 江苏胜大石油设备制造有限公司 | Oil casing threaded connection joint |
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN203835287U (en) * | 2014-04-30 | 2014-09-17 | 宝鸡石油钢管有限责任公司 | Air sealing type threaded connector structure provided with large-angle guiding surface and applied to oil casing |
| CN208502683U (en) * | 2018-04-11 | 2019-02-15 | 张祖林 | A kind of special thread buckle joint |
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3927436A1 (en) * | 1989-04-28 | 1990-10-31 | Rautenkranz Int Hermann | Tensile pipe connection for shaft conveyor pipes - includes thread free centring spaces between connecting sleeve and pipe |
| CN2731065Y (en) * | 2004-05-21 | 2005-10-05 | 中国石油天然气集团公司 | Air sealed threaded sleeve joint |
| CN2700542Y (en) * | 2004-06-10 | 2005-05-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special casing joint for thermal production well |
| CN101307845A (en) * | 2008-07-11 | 2008-11-19 | 江苏常宝钢管股份有限公司 | Oil conduit screwed connection structure |
| CN201288903Y (en) * | 2008-09-28 | 2009-08-12 | 上海海隆石油管材研究所 | Oil sleeve screwed connection head of negative bearing angle |
| CN201507731U (en) * | 2009-06-05 | 2010-06-16 | 江苏胜大石油设备制造有限公司 | Oil casing threaded connection joint |
| CN201496000U (en) * | 2009-08-20 | 2010-06-02 | 四川华工石油钢管有限责任公司 | Structure of hermetically sealed joint of oil pipe or sleeve |
| CN201502335U (en) * | 2009-10-05 | 2010-06-09 | 胜利油田胜机石油装备有限公司 | Oil sleeve joint |
| CN102678071A (en) * | 2012-06-06 | 2012-09-19 | 无锡西姆莱斯石油专用管制造有限公司 | High-airtightness special buttress thread sleeve connection joint |
| CN203835287U (en) * | 2014-04-30 | 2014-09-17 | 宝鸡石油钢管有限责任公司 | Air sealing type threaded connector structure provided with large-angle guiding surface and applied to oil casing |
| CN208502683U (en) * | 2018-04-11 | 2019-02-15 | 张祖林 | A kind of special thread buckle joint |
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