CN208280936U - The flexible gas gasket of common screw thread oil pipe hermetic seal - Google Patents
The flexible gas gasket of common screw thread oil pipe hermetic seal Download PDFInfo
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- CN208280936U CN208280936U CN201820868886.5U CN201820868886U CN208280936U CN 208280936 U CN208280936 U CN 208280936U CN 201820868886 U CN201820868886 U CN 201820868886U CN 208280936 U CN208280936 U CN 208280936U
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- oil pipe
- screw thread
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- gasket
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Abstract
The utility model discloses a kind of flexible gas gaskets of common screw thread oil pipe hermetic seal, the flexible gas gasket is integrally cylindrical, it is just filled in " J-shaped area ", to eliminate vortex to the adverse effect of sealing performance, the wall surface of the flexible gas gasket is corrugated, the flexible gas gasket both ends are connected to respectively on two pin thread end faces, under external force, spacing between the both ends, the height of the i.e. described flexible gas gasket can be varied, when its height becomes smaller, ripple on its wall surface is more intensive, and more it is adjacent to box cupling inner wall, to enhance the sealing effect at connection screw thread；In addition, the flexible gas gasket is directly placed in oil pipe, so the flexible gas gasket can take out and reuse from oil pipe, to further decrease use cost.
Description
Technical field
The utility model relates to gas well, gas drive injection-production wells etc. the gasket used in well existing for gas medium, especially
It is related to the flexible gas gasket of common screw thread oil pipe hermetic seal.
Background technique
In gas well, gas drive injection-production well, due to the presence of gas medium, the requirement to tubing seal ability is higher than commonly
Oil, well；Nowadays use the tubing string of special hermetic seal button-type to improve tubing string mostly in gas well and gas drive injection-production well
Sealability, but special button-type oil pipe cost is prohibitively expensive, considerably increases note and adopts cost, and due to special hermetic seal button-type
The particularity of material generally requires to carry out whole replacements to oil pipe in recompletion operation.
Common screw thread oil pipe is also referred to as flat to buckle oil pipe, cheap, but since button-type limits, thread root and tooth peak
Gap form potential leakage path, hermetic seal ability is limited, be often unable to satisfy note adopt during hermetic seal want
It asks.Although the hermetic seal ability of flat button oil pipe can be improved by using high-performance thread sealing grease, due to the smearing of stop-leak compound
Amount and smearing mode are distinctly claimed, and are restricted by On-the-spot factor and operating process, can not fully meet requirement, so that stop-leak compound
Using effect be difficult to ensure.
Therefore, common flat button oil pipe is selected, and takes a kind of seal approach being simple and efficient, note can be greatly reduced
Cost is adopted, note is improved and adopts efficiency；
In addition, when two common screw thread oil pipes in tubing coupling by fastening, as shown in fig. 1, female screw thread oil pipe/connect
Hoop female thread 001 and public 002 box cupling of screw thread oil pipe are fixed, by the box face 003 and male silk of female screw thread oil pipe/box cupling female thread 001
The pin thread end face 005 and box cupling inner wall 004 for detaining oil pipe 002 form a groove, and the groove is generally referred to as " J-shaped in industry
Area "；Gas is in oil pipe during flow at high speed, it will is formed and is vortexed in " J-shaped area ", generated under-voltage area, be unfavorable at screw thread
Sealing；Even more serious, gas can generate erosion effect here, have an adverse effect to the sealing effect at female thread.
The present inventor has done depth to existing common screw thread oil pipe hermetic seal device and " J-shaped area " due to the above reasons,
Enter research, goes out to be able to solve the completely new gasket of these problems to be designed.
Utility model content
In order to overcome the above problem, present inventor has performed sharp study, a kind of flexible gas gasket and close is designed
Encapsulation method, the flexible gas gasket is integrally cylindrical, is just filled in " J-shaped area ", to eliminate vortex to sealing
The wall surface of the adverse effect of performance, the flexible gas gasket is corrugated, which is connected to respectively
On two pin thread end faces, under external force, the spacing between the both ends, i.e., the height of the described flexible gas gasket can be with
It is varied, when its height becomes smaller, the ripple on wall surface is more intensive, and is more adjacent to box cupling inner wall, to enhance
Sealing effect at connection screw thread；In addition, since the flexible gas gasket is directly placed in oil pipe, so the bullet
Property gas seal can take out and reuse from oil pipe, use cost be further decreased, to complete the utility model.
Specifically, the purpose of this utility model is to provide with a kind of flexible gas of common screw thread oil pipe hermetic seal
Gasket, the gasket include the elastic component 1 being mounted between pin thread end face 005 and box face 003.
Wherein, the elastic component 1 is cylindrical.
Wherein, the end of the elastic component 1 is abutted with pin thread end face and box face respectively.
Wherein, the cylinder-shaped wall surface of the elastic component 1 is abutted with box cupling inner wall 004.
Wherein, the deformation when end is squeezed of elastic component 1, cylindrical wall face out expansion, cylinder-shaped wall surface
It is adjacent to box cupling inner wall 004；
The deformation when elastic component 1 is under pressure inside wall surface, the end are expanded to two sides, two end difference
It is adjacent to pin thread end face 005 and box face 003.
Wherein, the elastic component 1 includes the side wall 3 between the end 2 and two ends 2 of both side ends；
The end 2 is annular in shape, squeezes side wall 3 for abutting with pin thread end face, and from both ends,
The longitudinal cross-section of the side wall 3 is corrugated.
Wherein, the ripple includes the arc section 4 and straightway 5 of alternately connection；The arc section 4 forms wave crest and wave
Paddy；
Preferably, shape, the size of multiple arc sections 4 are all consistent；
Preferably, the size of multiple straightways 5 is consistent.
Wherein, the multiple straightway 5 is set parallel to each other.
Wherein, the end 2 is connected with the arc section 4 of side wall 3；
Preferably, which leans on 3 inner cavity of proximal wall.
The utility model also provide it is a kind of using flexible gas gasket described above to common screw thread oil pipe hermetic seal
Method,
This method comprises the following steps:
Step 1: smearing stop-leak compound in the upper and lower ends of the flexible gas gasket；
Step 2: smearing stop-leak compound on the screw thread of common screw thread oil pipe；
Step 3: gasket being put into the inner connecting end of box cupling female thread, so that the end 2 of flexible gas gasket and box cupling
The box face of female thread comes into full contact with；The side wall 3 of flexible gas gasket comes into full contact with the box cupling inner wall of box cupling female thread；
Step 4: the pin thread machine of public screw thread oil pipe tightly being held and screws in box cupling female thread and screws, is that oil pipe machine is tight by hydraulic tongs
Upper button, the standard that oil pipe is tightened to setting tightens position, and guarantees that operating process is gentle, finally makes flexible gas gasket
End 2 and the pin thread end face of public screw thread oil pipe come into full contact with；
Step 5: coordinating operation machine is directly gone into the well after buckleing on oil pipe, during underground work, pin thread end face and box end
Face squeezes gasket from upper and lower two sides, while mine gas expansion squeezes gasket from inside to outside, real under dual external force
Existing hermetic seal of the gasket to common screw thread oil pipe.
Beneficial effect possessed by the utility model includes:
(1) according to the flexible gas gasket and encapsulating method of common screw thread oil pipe hermetic seal provided by the utility model
It can play the role of enhancing sealing by filling elastic component on the basis of not changing common screw thread oil pipe inherent structure,
To realize the efficient sealed of low cost；
(2) according to the flexible gas gasket and encapsulating method of common screw thread oil pipe hermetic seal provided by the utility model
Structure is simple, easy to operate, can obtain good sealing effect on the basis of increasing operator's labor intensity；
(3) according to the flexible gas gasket and encapsulating method of common screw thread oil pipe hermetic seal provided by the utility model
Middle setting elastic component, which can either axially be adjacent to pin thread end face and box face, so that the elastic component
It is fitted closely between pin thread oil pipe, female thread oil pipe, additionally it is possible to make in the side wall and box cupling of elastic component along radial direction
Wall fits closely, and under the double action of internal gas pressure and external axial force, the above-mentioned fitting for fitting closely place is more firm
Gu so that sealing effect is reliable and stable.
Detailed description of the invention
Fig. 1 shows structural schematic diagram when two common screw thread oil pipes in tubing coupling by fastening in the prior art；
Fig. 2 shows carry out common dope with flexible gas gasket according to a kind of preferred embodiment of the utility model
The structural schematic diagram of pipe hermetic seal；
Fig. 3 shows the structural schematic diagram of the flexible gas gasket according to a kind of preferred embodiment of the utility model；
Fig. 4 shows the partial enlarged view of circled positions in Fig. 3；
Fig. 5 shows static pressure testing result table figure in embodiment；
Fig. 6 shows dynamic pressure testing result table figure in embodiment.
Drawing reference numeral explanation:
1- elastic component
The end 2-
3- side wall
4- arc section
5- straightway
Mother's 001- screw thread oil pipe/box cupling female thread
002- public affairs screw thread oil pipe
003- box face
004- box cupling inner wall
005- pin thread end face
Specific embodiment
The utility model is further described below by drawings and examples.Illustrated by these, this is practical new
The characteristics of type and advantage will become more apparent from clear.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the attached drawings
In terms of kind, but unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
According to the flexible gas gasket of common screw thread oil pipe hermetic seal provided by the utility model, such as Fig. 2, Fig. 3 and
Shown in Fig. 4, which includes the elastic component 1 being mounted between pin thread end face and box face.
The elastic component 1 is just filled in " J-shaped area ", eliminates the adverse effect of " J-shaped area " to tubing seal；Specifically
For, when two common screw thread oil pipes in tubing coupling by fastening, as shown in fig. 1, female screw thread oil pipe/box cupling female thread
001 fixes with public 002 box cupling of screw thread oil pipe, by the box face 003 and male screw thread oil pipe of female screw thread oil pipe/box cupling female thread 001
002 pin thread end face 005 and box cupling inner wall 004 form a groove, and the groove is generally referred to as " J-shaped area " in industry；Gas
In oil pipe during flow at high speed, it will formed and be vortexed in " J-shaped area ", generate under-voltage area, under-voltage area can destroy neighbouring spiral shell
Line seal area eliminates vortex and under-voltage area, makes naturally after the described elastic component is filled in " the J-shaped area "
The sealing effect and service life in thread seal area are enhanced.
Preferably, the elastic component 1 is whole cylindrical, outer diameter and mother's screw thread oil pipe/box cupling female thread 001
Internal diameter at box cupling inner wall 004 is consistent, the internal diameter of the internal diameter of the elastic component 1 and public screw thread oil pipe 002
Unanimously, it so that the fluid flow rate flowed therethrough is stablized, avoids generating vortex.
Preferably, the end of the elastic component 1 is abutted with pin thread end face and box face respectively, and is deposited each other
In biggish contact area, contact surface is smooth, and contact is close, and in the case where being pressed against each other, contact surface is in seal shape
State.
Preferably, the cylinder-shaped wall surface of the elastic component 1 is abutted with box cupling inner wall, the wall surface tool of the elastic component 1
It is flexible, it can more closely be attached on box cupling inner wall under external force, protect the threaded connection near box cupling inner wall close
Seal region.
In one preferred embodiment, the deformation when end is squeezed of elastic component 1, cylindrical wall towards
Outer expansion, cylindrical wall face paste immediately bind round inner wall；
The deformation when elastic component 1 is under pressure inside wall surface, the end are expanded to two sides, two end difference
It is adjacent to pin thread end face and box face,
When being all under pressure inside the end of the elastic component 1 and wall surface, the wall surface of elastic component is enabled to naturally
It more closely is attached on box cupling inner wall, so that the end of elastic component is adjacent to pin thread end face and box face respectively.
The wall surface of elastic component 1 is made of steel disc, rubber, high molecular polymer elastomeric material, in the feelings of proof strength
Has enough elasticity, toughness under condition.
The maximum outside diameter of the side wall 3 is having a size of 69~73mm, and the minimum diameter of the side wall 3 is having a size of 60~64mm.
In one preferred embodiment, the elastic component 1 includes positioned at the end 2 and two ends of both side ends
Side wall 3 between 2；
The end 2 is annular in shape, for being abutted with pin thread end face, and from both ends extruding side wall 3, the end 2 it is interior
Diameter size is consistent with the internal diameter of elastic component 1, and the outer diameter of the end 2 is consistent with the outer diameter of elastic component 1；
The height dimension of the end 2 is 3.2mm, and the internal diameter of end 2 is 60~64mm, the outer diameter of end 2
For 69~73mm.
Preferably, the internal diameter of end 2 is consistent with the cylindrical circular internal diameter of whole institute of elastic component 1, all basis
Internal diameter design at the box cupling inner wall 004 of female screw thread oil pipe/box cupling female thread 001, so that internal flow is in flow process,
For fluid cross-section without mutation, flow velocity is steady.
The longitudinal cross-section of the side wall 3 is corrugated, and the transversal cross-section of the side wall 3 is annular in shape；
The longitudinal cross-section refers to the section by tubular structure axis, and the transversal cross-section refers to perpendicular to tubular structure
The section of axis.
In one preferred embodiment, as shown in Fig. 2, Fig. 3 and Fig. 4, the ripple includes the circle of alternately connection
Segmental arc 4 and straightway 5；The arc section 4 forms wave crest and trough；It will not be connected directly each other between arc section and arc section,
It will not be connected directly each other between straightway and straightway；
Preferably, shape, the size of multiple arc sections 4 are all consistent；Each arc section 4 is substantially mutually the same, so that
It is uniformly contacted between side wall and box cupling inner wall 004, each other stress equalization；The more preferably described arc section is semicircle；
It is highly preferred that the inner radii of arc section 4 is having a size of 0.8~1.2mm；The outer radii of arc section 4 having a size of 1~
1.7mm, the thickness of arc section are 0.2~0.5mm；
Preferably, the length dimension of multiple straightways 5 is consistent with each other, the thickness of multiple straightways also that
This is consistent；So that the corrugated waveform that 3 longitudinal cross-section of side wall is in is waveform of uniform size, i.e., the described side wall 3
On be provided with uniform ripple struction, the size that each ripple outwardly protrudes is consistent, on the cylinder-shaped wall surface of elastic component 1 by
Pressing force be uniformly distributed, i.e., the pressing force being subject on each ripple is consistent, elastic component wall surface entirety uniform force.
It is furthermore preferred that the size of multiple straightways 5 is consistent, the length value of multiple straightways 5 is all 1.7~
2.1mm, the thickness value of straightway 5 are 0.2~0.5mm.
In one preferred embodiment, the multiple straightway 5 is set parallel to each other, i.e., straightway all with the circle
The axis of tubular wall surface is vertical, so that each ripple is evenly distributed on side wall, it is ensured that uniform force.
Preferably, the end 2 is connected with the arc section 4 of side wall 3；The arc section 4 is complete, has enough pressure-bearing energy
Power, convex structure are not easy to deform because of external force pressure；
Preferably, as shown in Fig. 3, Fig. 4, which leans on 3 inner cavity of proximal wall, and the cambered surface of the circular arc is towards side wall 3
Inside, can be to a greater degree outwardly against deformation, while to end 2 supported on both sides when by pressure from inside to outside；It is excellent
End 2 described in selection of land and side wall 3 are integrally formed.
The utility model also provides a kind of airtight to common screw thread oil pipe using flexible gas gasket as described above
The method of envelope,
This method comprises the following steps:
Step 1: smear stop-leak compound in the upper and lower ends of the flexible gas gasket, prevent gasket and pin thread end face,
There is spin friction breakage under the action of torque in the excessive end for leading to gasket of box face frictional force；
Step 2: smearing stop-leak compound on the screw thread of common screw thread oil pipe, improve screw thread self seal ability, reduce screw thread
Own frictional drag reduces labor intensity of operating staff；
Step 3: gasket being put into the inner connecting end of box cupling female thread, so that the end 2 of flexible gas gasket and box cupling
The box face of female thread comes into full contact with；The side wall 3 of flexible gas gasket comes into full contact with the box cupling inner wall of box cupling female thread；
Step 4: the pin thread machine of public screw thread oil pipe tightly being held and screws in box cupling female thread and screws, is that oil pipe machine is tight by hydraulic tongs
Upper button, the standard that oil pipe is tightened to setting tightens position, and guarantees that operating process is gentle, finally makes flexible gas gasket
End 2 and the pin thread end face of public screw thread oil pipe come into full contact with；The pin thread machine is tightly held and is screwed into mother on as male screw thread oil pipe
One end in screw thread oil pipe.
Step 5: coordinating operation machine is directly gone into the well after buckleing on oil pipe, during underground work, pin thread end face and box end
Face squeezes gasket from upper and lower two sides, while mine gas expansion squeezes gasket from inside to outside, real under dual external force
Existing hermetic seal of the gasket to common screw thread oil pipe.
Embodiment
According to the flexible gas gasket of common screw thread oil pipe hermetic seal provided by the utility model, which includes
The elastic component 1 being mounted between pin thread end face 005 and box face 003, the elastic component 1 include being located at both side ends
Side wall 3 between end 2 and two ends 2；The longitudinal cross-section of the side wall 3 is corrugated；The ripple includes alternately connecting
Arc section 4 and straightway 5；
Shape, the size of multiple arc sections 4 are all consistent, and the inner radii of arc section 4 is having a size of 1mm；Arc section 4
Outer radii is 0.3mm having a size of 1.3mm, the i.e. thickness of arc section；
The size of multiple straightways 5 is consistent, and the length value of multiple straightways 5 is all 1.9mm, straightway 5
Thickness value is 0.3mm.
The height dimension of the end 2 is 3.2mm, and the internal diameter of end 2 is 62mm, and the outer diameter of end 2 is
71mm。
The maximum outside diameter of the side wall 3 is having a size of 71mm, and the minimum diameter of the side wall 3 is having a size of 62mm.
By the way that above-mentioned certain size parameter is arranged, so that the sealing effect of the gasket reaches optimum state, in static state
It can works fine under pressure and dynamic pressure, it is ensured that the sealing effect of oil pipe, so that stable gas pressure in oil pipe, no gas leakage,
Specifically, the gasket in the present embodiment 1 is mounted in common screw thread oil pipe,
Static pressure test is done to the oil pipe, pressure variation is as shown in Figure 5 in test:
As can be known from Fig. 5, under the action of 38-39Mpa pressure, which is able to maintain that good sealing effect,
Without gas leakage in 2 hour inner oil tubes of test, pressure is stablized in oil pipe.
Dynamically pressure testing is done to the oil pipe again, test data such as following table one, pressure variation is as shown in Figure 6:
Table one
| Time | Pressure (MPa) |
| 0:00 | 50.73 |
| 0:05 | 50.35 |
| 0:10 | 50.03 |
| 0:15 | 49.83 |
| 0:20 | 49.48 |
| 0:25 | 49.31 |
| 0:30 | 48.95 |
| 0:35 | 48.78 |
| 0:40 | 48.60 |
| 1:00 | 48.25 |
| 1:30 | 47.90 |
| 2:00 | 47.73 |
| 2:30 | 47.55 |
| 3:00 | 47.38 |
| 3:30 | 47.20 |
| 4:00 | 47.03 |
| 4:30 | 47.03 |
| 5:00 | 46.68 |
| 5:30 | 46.68 |
| 6:00 | 46.54 |
| 6:30 | 46.50 |
| 7:00 | 46.33 |
| 7:30 | 46.33 |
| 8:00 | 46.33 |
| 12:00 | 46.31 |
From in table one and Fig. 6 it is found that experienced 8 hours dynamic pressure act on after, which still is able to maintain
Good sealing effect, without gas leakage in subsequent 4 hours inner oil tubes, pressure is stablized in oil pipe.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", "front", "rear" etc.
The orientation or positional relationship of instruction is to be merely for convenience of retouching based on the orientation or positional relationship under utility model works state
State the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore should not be understood as limiting the present invention.
It combines preferred embodiment above the utility model is illustrated, but these embodiments are only models
Example property, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the utility model, these
It each falls in the protection scope of the utility model.
Claims (10)
1. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal, which is characterized in that the gasket includes being mounted on
Elastic component (1) between pin thread end face (005) and box face (003).
2. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 1, which is characterized in that
The elastic component (1) is cylindrical.
3. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 2, which is characterized in that
The end of the elastic component (1) is abutted with pin thread end face and box face respectively.
4. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 2, which is characterized in that
The cylinder-shaped wall surface of the elastic component (1) is abutted with box cupling inner wall (004).
5. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal described in one of -4 according to claim 1, special
Sign is,
Elastic component (1) deformation when end is squeezed, cylindrical wall face out expansion, and cylindrical wall face paste is immediately bound round
Inner wall (004)；
The deformation when elastic component (1) is under pressure inside wall surface, the end are expanded to two sides, and two ends are pasted respectively
Tight pin thread end face (005) and box face (003).
6. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 1, which is characterized in that
The elastic component (1) includes the side wall (3) between the end (2) and two ends (2) of both side ends；
The end (2) is annular in shape, squeezes side wall (3) for abutting with pin thread end face, and from both ends,
The longitudinal cross-section of the side wall (3) is corrugated.
7. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 6, which is characterized in that
The ripple includes the arc section (4) and straightway (5) of alternately connection；The arc section (4) forms wave crest and trough；
Shape, the size of multiple arc sections (4) are all consistent；
The size of multiple straightways (5) is consistent.
8. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 7, which is characterized in that
The multiple straightway (5) is set parallel to each other.
9. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 7, which is characterized in that
The end (2) is connected with the arc section (4) of side wall (3).
10. a kind of flexible gas gasket of common screw thread oil pipe hermetic seal according to claim 9, feature exist
In,
The arc section (4) leans on proximal wall (3) inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820868886.5U CN208280936U (en) | 2018-06-05 | 2018-06-05 | The flexible gas gasket of common screw thread oil pipe hermetic seal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820868886.5U CN208280936U (en) | 2018-06-05 | 2018-06-05 | The flexible gas gasket of common screw thread oil pipe hermetic seal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533208A (en) * | 2018-06-05 | 2018-09-14 | 南通中杰石油科研仪器有限公司 | The flexible gas gasket and encapsulating method of common screw thread oil pipe hermetic seal |
-
2018
- 2018-06-05 CN CN201820868886.5U patent/CN208280936U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533208A (en) * | 2018-06-05 | 2018-09-14 | 南通中杰石油科研仪器有限公司 | The flexible gas gasket and encapsulating method of common screw thread oil pipe hermetic seal |
| CN108533208B (en) * | 2018-06-05 | 2024-05-14 | 南通中杰石油科研仪器有限公司 | Elastic gas sealing gasket for air seal of common screw thread oil pipe and sealing method |
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