CN208534424U - A kind of high intensity high sealing special buckle casing - Google Patents
A kind of high intensity high sealing special buckle casing Download PDFInfo
- Publication number
- CN208534424U CN208534424U CN201820873536.8U CN201820873536U CN208534424U CN 208534424 U CN208534424 U CN 208534424U CN 201820873536 U CN201820873536 U CN 201820873536U CN 208534424 U CN208534424 U CN 208534424U
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- CN
- China
- Prior art keywords
- screw thread
- box cupling
- external screw
- layer
- thread
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The utility model discloses a kind of high-intensitive high sealing special buckle casings, including casing pipe and box cupling, the symmetrical configuration of casing pipe and box cupling both ends, casing pipe both ends outer circumference surface are disposed with tube body first layer external screw thread, tube body second layer external screw thread, external seal face；The both ends inner peripheral surface of box cupling is disposed with box cupling first layer external screw thread, box cupling second layer external screw thread, inner sealing surface.Double-layer thread structure makes full use of reach effectively, and threaded connection intensity is made to be doubled and redoubled；Tension resistance bonding strength can be improved in first layer rectangular thread, and sealing intensity can be improved in second layer round thread；The design of sealing surface spherical shape can utilize area in sealing contact to greatest extent, significantly promote metal air-tight seal effect, while also enhancing compressive property, the working environment being particularly adapted under the high temperature and pressure complex hole condition such as ultradeep well, high angle hole.
Description
Technical field
The utility model relates to petroleum drilling and mining tubing thread technology field, in particular to a kind of high-intensitive high sealing special buckle
Casing.
Background technique
The oil casing threaded of API standard is each tubing and casing factory of the most common oil pipes in China and China
Leading products, this product technology is mature, easy to process.But there are still some intrinsic in structure for the oil sleeve joint
Defect, such as sealed, unreliable, resistance to torsion is low and the easy thread gluing of screw thread, limits the use of API tubing and casing.
Sharply soaring and petroleum allowable exploitation reduction year by year with the world to fossil energy demand, current oil exploitation
The direction of extraction of field forward direction deep-well, ultradeep well, high-pressure oil-gas well, thick oil thermal extraction, directional well etc. gradually develops, thus to stone
Sealing between casing and pipe proposes increasingly harsher technical requirements.API (American Petroleum Institute (API)) mark largely used in the past
Director circle screw thread and buttress thread connector are unable to meet the oil gas of mining environment inclement condition in gas tightness, bonding strength
The demand of well, especially under ultradeep well high temperature Action of Combined Loads, standard API screw thread has been unable to satisfy high sealing high intensity
The high-performance special buckle casing that demand forces people to go research and development performance relatively reliable.
Summary of the invention
The purpose of this utility model is in view of the above-mentioned drawbacks of the prior art and insufficient, and providing one kind can be effective
Structural strength has the Double-layer threaded special buckle casing of excellent seal performance again.
To realize the purpose of this utility model, the utility model provides a kind of high-intensitive high sealing special buckle casing, packet
Include casing pipe and box cupling, the symmetrical configuration of described sleeve pipe tube body and box cupling both ends, described sleeve pipe tube body both ends outer circumference surface according to
It is secondary to be provided with tube body first layer external screw thread, tube body second layer external screw thread, external seal face；The both ends inner peripheral surface of the box cupling is successively
It is provided with box cupling first layer external screw thread, box cupling second layer external screw thread, inner sealing surface, screw thread rotation engages in use, with inside and outside
Gradually screwing for screw thread comes into contact with inside and outside sealing surface until generating interference fit, and magnitude of interference is controlled in 0.010-
0.20mm。
Preferably, the tube body first layer external screw thread and the externally threaded tooth form of box cupling first layer are equivalent rectangular thread knot
Structure, and it mutually rotates engagement.
Preferably, inside and outside rectangular thread structure is identical and is straight thread, screw pitch=12.7mm, tooth height=2.15mm, tooth
Top and taper parallel with bottom of the tooth is 0.100mm/mm.
Preferably, the tube body second layer external screw thread and the externally threaded tooth form of the box cupling second layer are equivalent round thread knot
Structure, and it mutually rotates engagement.
Preferably, inside and outside circle helicitic texture is identical, screw pitch=12.7mm, thread form angle=60 °, taper 0.100mm/
mm。
Preferably, inside and outside sealing surface is the spherical and radius of a ball=1.125 and the high product of tooth.
Preferably, casing pipe product specification outer diameter=139.7~177.8mm.
Compared with prior art, the beneficial effects of the utility model are,
1, using double-layer thread structure, reach is effectively made full use of, and threaded connection intensity is made to be doubled and redoubled；
2, using double-layer thread structure, tension resistance bonding strength, second layer circle spiral shell is can be improved in first layer rectangular thread
Sealing intensity can be improved in line；
3, the design of sealing surface spherical shape can utilize area in sealing contact to greatest extent, significantly promote metal air-tight seal effect
Fruit, while also enhancing compressive property；
4, the working environment being particularly adapted under the high temperature and pressure complex hole condition such as ultradeep well, high angle hole.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of the utility model；
Fig. 2 show the casing pipe structural schematic diagram of the utility model；
Fig. 3 show the box cupling structural schematic diagram of the utility model；
Fig. 4 show the first layer helicitic texture schematic diagram of the utility model；
Fig. 5 show the second layer helicitic texture schematic diagram of the utility model；
Fig. 6 show the spherical seal surface structural schematic diagram of the utility model；
In figure: 1. casing pipes, 2. box cuplings, 3. tube body first layer external screw threads, 4. tube body second layer external screw threads, 5. external seals
Face, 6. box cupling first layer external screw threads, 7. box cupling second layer external screw threads, 8. inner sealing surfaces, P1- rectangular thread lead, h1- rectangular teeth
Height, P2- round thread lead, α-thread form angle, the SR- radius of a ball, D- product specification outer diameter.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
It should be noted that " connection " described herein and the word for expressing " connection ", as " being connected ",
" connected " etc. had both included that a certain component is directly connected to another component, and had also included that a certain component passes through other component and another portion
Part is connected.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in figs 1 to 6, the utility model embodiment provides a kind of high-intensitive high sealing special buckle casing, including set
Pipe tube body 1 and box cupling 2, the symmetrical configuration at 2 both ends of described sleeve pipe tube body 1 and box cupling, 1 both ends outer circumference surface of described sleeve pipe tube body according to
It is secondary to be provided with tube body first layer external screw thread 3, tube body second layer external screw thread 4, external seal face 5；The both ends inner peripheral surface of the box cupling 2
Be disposed with box cupling first layer external screw thread 6, box cupling second layer external screw thread 7, inner sealing surface 8, screw thread rotation engagement in use, with
Gradually screwing for internal and external threads come into contact with inside and outside sealing surface until generating interference fit, magnitude of interference is controlled in 0.010-
0.20mm。
Wherein, the tooth form of the tube body first layer external screw thread 3 and box cupling first layer external screw thread 6 is equivalent rectangular thread knot
Structure, and it mutually rotates engagement.
Wherein, inside and outside rectangular thread structure it is identical and be straight thread, pitch P 1=12.7mm, the high h=2.15mm of tooth,
Tooth top is parallel with bottom of the tooth and taper is 0.100mm/mm.
Wherein, the tooth form of the tube body second layer external screw thread 4 and box cupling second layer external screw thread 7 is equivalent round thread knot
Structure, and it mutually rotates engagement.
Wherein, inside and outside circle helicitic texture is identical, pitch P 2=12.7mm, thread form angle α=60 °, taper 0.100mm/
mm。
Wherein, inside and outside sealing surface is spherical and radius of a ball SR=1.125h.
Wherein, described sleeve pipe tube body product specification outer diameter D=139.7~177.8mm.
The beneficial effects of the utility model are,
1, using double-layer thread structure, reach is effectively made full use of, and threaded connection intensity is made to be doubled and redoubled；
2, using double-layer thread structure, tension resistance bonding strength, second layer circle spiral shell is can be improved in first layer rectangular thread
Sealing intensity can be improved in line；
3, the design of sealing surface spherical shape can utilize area in sealing contact to greatest extent, significantly promote metal air-tight seal effect
Fruit, while also enhancing compressive property；
4, the working environment being particularly adapted under the high temperature and pressure complex hole condition such as ultradeep well, high angle hole.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (7)
1. a kind of high intensity high sealing special buckle casing, which is characterized in that including casing pipe (1) and box cupling (2), described sleeve pipe
The symmetrical configuration of tube body (1) and box cupling (2) both ends, described sleeve pipe tube body (1) both ends outer circumference surface are disposed with tube body first
Layer external screw thread (3), tube body second layer external screw thread (4), external seal face (5)；The both ends inner peripheral surface of the box cupling (2) is set gradually
Have box cupling first layer external screw thread (6), box cupling second layer external screw thread (7), an inner sealing surface (8), screw thread rotation engagement in use, with
Gradually screwing for internal and external threads comes into contact with inside and outside sealing surface until generating interference fit, and magnitude of interference is controlled in 0.010-
0.20mm。
2. a kind of high-intensitive high sealing special buckle casing according to claim 1, which is characterized in that the tube body first layer
The tooth form of external screw thread (3) and box cupling first layer external screw thread (6) is equivalent rectangular thread structure, and it mutually rotates engagement.
3. a kind of high-intensitive high sealing special buckle casing according to claim 2, which is characterized in that inside and outside rectangular thread
Structure is identical and is straight thread, and screw pitch=12.7mm, tooth height=2.15mm, tooth top is parallel with bottom of the tooth and taper is 0.100mm/
mm。
4. a kind of high-intensitive high sealing special buckle casing according to claim 1, which is characterized in that the tube body second layer
The tooth form of external screw thread (4) and box cupling second layer external screw thread (7) is equivalent round thread structure, and it mutually rotates engagement.
5. a kind of high-intensitive high sealing special buckle casing according to claim 4, which is characterized in that inside and outside round thread knot
Structure is identical, screw pitch=12.7mm, thread form angle=60 °, taper 0.100mm/mm.
6. a kind of high-intensitive high sealing special buckle casing according to claim 1, which is characterized in that inside and outside sealing surface is ball
Shape and the radius of a ball=1.125 and the high product of tooth.
7. a kind of high-intensitive high sealing special buckle casing according to claim 1, which is characterized in that casing pipe (1) produces
Product specification outer diameter=139.7~177.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820873536.8U CN208534424U (en) | 2018-06-07 | 2018-06-07 | A kind of high intensity high sealing special buckle casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820873536.8U CN208534424U (en) | 2018-06-07 | 2018-06-07 | A kind of high intensity high sealing special buckle casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208534424U true CN208534424U (en) | 2019-02-22 |
Family
ID=65381088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820873536.8U Expired - Fee Related CN208534424U (en) | 2018-06-07 | 2018-06-07 | A kind of high intensity high sealing special buckle casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208534424U (en) |
-
2018
- 2018-06-07 CN CN201820873536.8U patent/CN208534424U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |