CN107448607B - Sealing structure of downhole tool test device - Google Patents
Sealing structure of downhole tool test device Download PDFInfo
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- CN107448607B CN107448607B CN201710760505.1A CN201710760505A CN107448607B CN 107448607 B CN107448607 B CN 107448607B CN 201710760505 A CN201710760505 A CN 201710760505A CN 107448607 B CN107448607 B CN 107448607B
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- sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/166—Sealings between relatively-moving surfaces with means to prevent the extrusion of the packing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/24—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings with radially or tangentially compressed packing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention discloses a sealing structure of an underground tool test device, which relates to the field of mechanical sealing, and comprises a rod piece, a sealed container body, a sealing head and a gland, wherein the container body comprises an end cover, and a stepped bayonet is arranged on the end cover; the sealing head is arranged in the bayonet, and at least one sealing ring is arranged between the sealing head and the end cover; the gland is arranged on the sealing head, and the outer side of the gland is connected with the inner side of the end cover; the rod piece sequentially passes through the gland and the sealing head, a sealing piece and at least one guide slip ring are arranged between the sealing head and the rod piece, the guide slip ring is made of rigid materials, and under the environment of normal temperature and normal pressure, the sealing piece and the rod piece form initial sealing of line contact, and when in the high-temperature high-pressure test environment, the sealing piece is propped against the rod piece due to the self-tightening effect. The sealing structure of the downhole tool testing device provided by the invention can effectively simulate the actual operation environment of the downhole tool, so that the performance test safety and reliability of the downhole tool are good.
Description
Technical Field
The invention relates to the field of mechanical sealing, in particular to a sealing structure of a downhole tool testing device.
Background
In the oil and gas resource exploration and development process, various downhole tools are required to be put into an oil and gas well for operation, the reliability of the downhole tools in the downhole operation directly influences the efficiency and success and failure of the downhole operation, and therefore, various key performance indexes of the downhole tools are required to be checked before the downhole operation. The method generally adopted at home and abroad at present is to establish a high-temperature ultrahigh-pressure downhole tool test device on the ground, simulate the high-temperature and ultrahigh-pressure working environment of an oil-gas well on the ground, and perform various performance tests and action tests such as high-temperature resistance, high-pressure resistance, axial loading, rotary loading and the like on the downhole tool under the environment, and can perform downhole operation after the downhole tool is qualified by inspection.
In the prior art, the method for realizing dynamic sealing is to arrange a sealing element around a force loading rod, however, the sealing element deforms and expands under the high-temperature and high-pressure environment, so that the friction force between the sealing element and the force loading rod is greatly increased, and the axial loading or the rotation loading and other tests cannot be carried out at the same time under the high-temperature and high-pressure environment.
In general, the high-temperature ultrahigh-pressure test devices of underground tools in domestic markets all adopt parameter tests under the action of step-by-step load, namely axial loading or rotary loading actions are carried out firstly, then high-temperature ultrahigh-pressure tests are carried out after the actions are finished, and then action tests are carried out after the tests are finished for pressure relief. However, in actual use, the downhole tool operation needs to load force under high temperature and high pressure environment, and the test method of the downhole tool cannot truly and effectively simulate the actual operation environment of the downhole tool, so that the safety and reliability of the performance test of the downhole tool are poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the sealing structure of the downhole tool testing device, which can simultaneously carry out force loading tests in a high-temperature and high-pressure environment, effectively simulate the actual operation environment of the downhole tool and ensure that the performance test of the downhole tool is safe and reliable.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a seal structure for a downhole tool testing device, comprising:
a sealed container body comprising an end cap provided with a stepped bayonet;
the sealing head is assembled in the bayonet, and at least one sealing ring is arranged between the sealing head and the end cover;
the gland is arranged on the sealing head, and the outer side of the gland is connected with the inner side of the end cover;
the rod piece is used for applying acting force to the downhole tool, the rod piece sequentially passes through the gland and the sealing head, a sealing piece and at least one guide slip ring are arranged between the sealing head and the rod piece, the guide slip ring is made of rigid materials, when the sealing structure is in a normal temperature and normal pressure environment, the sealing piece is in line contact with the rod piece, and when the sealing structure is in a high temperature and high pressure test environment, the sealing piece is propped against the rod piece due to the thermal expansion and self-tightening effect.
On the basis of the technical scheme, the sealing head comprises a first sealing part and a second sealing part which are arranged along the axial direction, the first sealing part and the second sealing part are detachably connected in a sealing way, the sealing piece is arranged at the joint of the first sealing part and the second sealing part, and the second sealing part comprises a protrusion for limiting the axial position of the sealing piece.
On the basis of the technical scheme, the outer diameter of the first sealing part is larger than that of the second sealing part, the gland comprises a cavity capable of accommodating the second sealing part, the second sealing part is positioned in the cavity, and the gland presses the first sealing part and the second sealing part.
On the basis of the technical scheme, the gland comprises a first cover body and a second cover body which are sleeved, the first cover body and the second cover body are respectively and correspondingly pressed on the second sealing part and the first sealing part, the rod piece, the first cover body, the second cover body and the end cover are sequentially arranged from inside to outside, and the second cover body is connected with the end cover.
On the basis of the technical scheme, the sealing piece comprises at least one group of sealing units, each sealing unit comprises a J-shaped sealing ring and an O-shaped sealing ring, each J-shaped sealing ring comprises a rectangular part and a bending part, and each O-shaped sealing ring is arranged between each sealing head and each bending part.
On the basis of the technical scheme, the sealing piece comprises two groups of sealing units, and a rectangular sealing ring is arranged between the two groups of sealing units.
On the basis of the technical scheme, two guide slip rings are arranged between the sealing head and the rod piece, and the sealing piece is positioned between the two guide slip rings.
On the basis of the technical scheme, two dustproof rings are further arranged between the sealing head and the rod piece, and the two dustproof rings are respectively positioned at two ends of the sealing head.
Compared with the prior art, the invention has the advantages that:
(1) The sealing structure comprises the sealing element and the guiding slip ring, the guiding slip ring is contacted with the rod piece, the guiding slip ring plays a role in guiding the rod piece, when the rod piece is loaded with force, all loads (loads such as stretching, compressing and torsion) are only transmitted to the guiding slip ring and cannot be applied to the sealing element, when the sealing structure is in a normal temperature and normal pressure environment, the sealing element is in line contact with the rod piece, initial sealing can be completed, the sealing element is gradually deformed and expanded under a high temperature and high pressure environment in a test, the sealing element is propped against the rod piece, at the moment, the guiding slip ring limits the movement direction of the rod piece, so that the rod piece only generates axial force on the sealing element, friction force between the sealing element and the rod piece is reduced, the force loading of the rod piece can be effectively simulated under the high temperature and high pressure environment, and the practical operation environment of the downhole tool is enabled to be tested safely and reliably.
(2) The sealing head comprises the first sealing part and the second sealing part, the second sealing part comprises a bulge used for limiting the axial position of the sealing element, the bulge can also prevent the first sealing part and the second sealing part from moving relatively in the radial direction, the first sealing part and the second sealing part are arranged along the axial direction and are detachably connected, and the first sealing part and the second sealing part can be prevented from moving relatively in the axial direction, so that the sealing effect is better.
(3) The sealing unit in the sealing structure comprises the J-shaped sealing ring and the O-shaped sealing ring, when the rod piece is loaded with force in a high-temperature and high-pressure environment, the bulge generates axial pressure on the J-shaped sealing ring and the O-shaped sealing ring to enable the J-shaped sealing ring and the O-shaped sealing ring to be compressed and deformed, at the moment, the gap between the O-shaped sealing ring and the J-shaped sealing ring is reduced due to compression deformation, the sealing piece is effectively prevented from being sheared to leak, the sealing performance is better, and the sealing structure is safe and reliable.
Drawings
FIG. 1 is a schematic diagram of a seal configuration of a downhole tool testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a seal head according to an embodiment of the present invention;
FIG. 3 is a schematic view of a seal in accordance with an embodiment of the present invention.
In the figure: the novel anti-dust sealing device comprises a 1-rod piece, a 2-end cover, a 3-sealing head, a 3 a-first sealing part, a 3 b-second sealing part, a 30-bulge, a 4-sealing ring, a 5-gland, a 51-first cover body, a 52-second cover body, a 6-sealing piece, a 60-J-shaped sealing ring, a 600-rectangular part, a 601-bending part, a 61-O-shaped sealing ring, a 62-rectangular sealing ring, a 7-guiding slip ring and an 8-dust ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, an embodiment of the present invention provides a sealing structure of a downhole tool testing device, including: a stem 1 for applying a force to a downhole tool, a sealed container body, a sealing head 3 and a gland 5.
The container body comprises an end cover 2, and a stepped bayonet is arranged on the end cover 2. The sealing head 3 is arranged in the bayonet, and at least one sealing ring 4 is arranged between the sealing head 3 and the end cover 3. The gland 5 is arranged on the gland head 3, and the outer side of the gland 5 is connected with the inner side of the end cover 2.
The rod member 1 sequentially passes through the gland 5 and the sealing head 3, and a sealing piece 6 and at least one guiding slip ring 7 are arranged between the sealing head 3 and the rod member 1
The guide slip ring 7 is made of rigid materials, and the diameter of the guide slip ring 7 is slightly larger than that of the rod piece 1, so that the rod piece 1 can be just sleeved in the guide slip ring 7. When the rod piece 1 is loaded with force, the guide slip ring 7 limits the movement direction of the rod piece 1, and plays a good guide role. Preferably, the guiding slip ring 7 is made of copper alloy, and has surface roughness not less than
Not only has good high temperature resistance, but also has self-lubricating function.
Preferably, two guiding slip rings 7 are arranged between the sealing head 3 and the rod piece 1, and the sealing piece 6 is positioned between the two guiding slip rings 7, and the two guiding slip rings 7 can limit the movement direction of the rod piece 1 at the same time, so that the sealing piece 6 cannot be subjected to radial acting force of the rod piece 1, the sealing piece 6 is overhead in a normal temperature and pressure environment, and only subjected to axial acting force of the rod piece 1 in a high temperature and high pressure environment, thereby reducing friction force between the rod piece 1 and the sealing piece 6.
When the sealing structure is in a normal temperature and pressure environment, the sealing element 6 is in line contact with the rod piece 1, and when the sealing structure is in a high temperature and high pressure test environment, the sealing element 6 is abutted against the rod piece 1 due to thermal expansion and self-tightening effect.
In this embodiment, the test temperature is usually 200 ℃, 250 ℃, 300 ℃, and the like, and according to different expansion deformation degrees of the sealing element 6 at different temperatures, a proper sealing element 6 is selected, so that the expansion deformation of the sealing element 6 at the corresponding test temperature can just make the gap disappear; at the test temperature of different temperatures, also can use the same sealing member 6, when sealing member 6 is in minimum test temperature, sealing member 6 is the deformation expansion gradually, and this clearance is smaller and smaller until disappearing, at this moment, sealing member 6 supports and holds in member 1, when sealing member 6 is in higher test temperature, there is frictional force between sealing member and the member, but this frictional force also can be less relatively, also can carry out the loading of force to the member, effectively simulate out the actual operation environment of instrument in pit for the performance test fail safe nature of instrument in pit is good.
Referring to fig. 2, the sealing head 3 includes a first sealing portion 3a and a second sealing portion 3b disposed in an axial direction, the first sealing portion 3a and the second sealing portion 3b are detachably connected in a sealing manner, the seal member 6 is disposed at a junction of the first sealing portion 3a and the second sealing portion 3b, and the second sealing portion 3b includes a protrusion 30 for restricting an axial position of the seal member 6. The first sealing part 3a and the second sealing part 3b are connected through bolts, so that the assembly and the disassembly are convenient.
The protrusion 30 can restrict the axial position of the seal 6, and can prevent the first seal portion 3a and the second seal portion 3b from moving relatively in the radial direction; meanwhile, the first sealing part 3a and the second sealing part 3b are arranged along the axial direction and are detachably connected, so that the first sealing part 3a and the second sealing part 3b can be prevented from relatively moving along the axial direction, and the sealing effect is better.
The outer diameter of the first sealing part 3a is larger than that of the second sealing part 3b, the gland 5 comprises a cavity body capable of accommodating the second sealing part 3b, the second sealing part 3b is positioned in the cavity body, and the gland 5 is pressed on the first sealing part 3a and the second sealing part 3 b.
The gland 5 includes a first cover 51 and a second cover 52 that are sleeved, the first cover 51 and the second cover 52 are respectively pressed against the second sealing portion 3b and the first sealing portion 3a, and the rod 1, the first cover 51, the second cover 52 and the end cover 2 are sequentially arranged from inside to outside, and the second cover 52 is connected with the end cover 2. The first cover 71 and the second cover 72, and the second cover 72 and the end cover 2 are all in threaded connection.
Referring to fig. 3, the sealing member 6 includes at least one set of sealing units including a J-ring 60 and an O-ring 61, the J-ring 60 including a rectangular portion 600 and a curved portion 601, the O-ring 61 being disposed between the sealing head 3 and the curved portion 601. When the rod piece 1 is loaded in a high-temperature and high-pressure environment and simultaneously, the bulge 30 generates axial pressure on the J-shaped sealing ring 60 and the O-shaped sealing ring 61 to enable the J-shaped sealing ring and the O-shaped sealing ring 61 to be compressed and deformed, at the moment, the gap between the O-shaped sealing ring 61 and the J-shaped sealing ring 60 is reduced due to compression deformation, the sealing piece 6 is effectively prevented from being sheared to leak, the sealing performance is better, and the safety and the reliability are realized.
According to different test environments, a plurality of groups of sealing units can be selected for combined use. In this embodiment, the sealing member 6 comprises two sets of sealing units, and a rectangular sealing ring 62 is arranged between the two sets of sealing units.
The J-shaped sealing ring 60, the O-shaped sealing ring 61 and the rectangular sealing ring 62 are made of fluororubber, and the high-temperature and high-pressure resistance performance is good.
Two dustproof rings 8 are further arranged between the sealing head 3 and the rod piece 1, the two dustproof rings 8 are respectively positioned at two ends of the sealing head 3, and foreign matters can be prevented from falling into the contact surface between the rod piece 1 and the sealing head 3, so that the sealing head 3 is prevented from being scratched.
The sealing structure principle of the downhole tool testing device in the embodiment of the invention is as follows: under normal temperature and normal pressure environment, the sealing element 6 and the rod piece 1 are in line contact initial sealing, the guide slip ring 7 is in contact with the rod piece 1, under high temperature and high pressure test environment, the sealing element 6 is gradually deformed and expanded, the sealing element 6 is propped against the rod piece 1 under the self-tightening action, so that dynamic sealing between the rod piece 1 and the sealing head 3 is realized, at the moment, the guide slip ring 7 limits the movement direction of the rod piece 1, so that the rod piece 1 only generates axial force on the sealing element 6, and mutual friction force can be reduced.
The sealing structure of the downhole tool testing device in the embodiment is good in sealing effect, friction force between the sealing piece and the rod piece is small, so that force loading can be carried out on the rod piece under the high-temperature and high-pressure environment, the actual operation environment of the downhole tool can be effectively simulated, and the performance test safety and reliability of the downhole tool are good.
The invention is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the invention, which modifications and adaptations are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (6)
1. A seal structure for a downhole tool testing device, comprising:
a sealed container body comprising an end cover (2), wherein a stepped bayonet is arranged on the end cover (2);
the sealing head (3) is assembled in the bayonet, and at least one sealing ring (4) is arranged between the sealing head (3) and the end cover (2);
the gland (5) is arranged on the sealing head (3), and the outer side of the gland (5) is connected with the inner side of the end cover (2);
the rod piece (1) is used for applying acting force to the downhole tool, the rod piece (1) sequentially penetrates through the gland (5) and the sealing head (3), a sealing piece (6) and two guide slip rings (7) are arranged between the sealing head (3) and the rod piece (1), and the sealing piece (6) is positioned between the two guide slip rings (7);
the guide slip ring (7) is made of rigid materials, and the diameter of the guide slip ring (7) is slightly larger than that of the rod piece (1), so that the rod piece (1) is just sleeved in the guide slip ring (7);
the sealing element (6) is selected according to the test temperature, so that the expansion deformation of the sealing element (6) at the corresponding test temperature can just eliminate the gap between the sealing element (6) and the rod piece (1);
when the sealing structure is in a normal temperature and normal pressure environment, the sealing element (6) is in line contact with the rod piece (1), and the two guide slip rings (7) limit the movement direction of the rod piece (1) at the same time, so that the sealing element (6) is overhead and only receives the axial acting force of the rod piece (1);
when the sealing structure is in a high-temperature high-pressure test environment, the sealing piece (6) is propped against the rod piece (1) due to the thermal expansion and self-tightening action;
the sealing head (3) comprises a first sealing part (3 a) and a second sealing part (3 b) which are arranged along the axial direction, the first sealing part (3 a) and the second sealing part (3 b) are detachably connected in a sealing way, the sealing element (6) is arranged at the joint of the first sealing part (3 a) and the second sealing part (3 b), and the second sealing part (3 b) comprises a protrusion (30) used for limiting the axial position of the sealing element (6).
2. The seal structure of claim 1, wherein: the outer diameter of the first sealing part (3 a) is larger than that of the second sealing part (3 b), the gland (5) comprises a cavity body capable of accommodating the second sealing part (3 b), the second sealing part (3 b) is positioned in the cavity body, and the gland (5) is pressed on the first sealing part (3 a) and the second sealing part (3 b).
3. The seal structure of claim 2, wherein: the gland (5) comprises a first cover body (51) and a second cover body (52) which are sleeved, the first cover body (51) and the second cover body (52) are respectively and correspondingly pressed on the second sealing part (3 b) and the first sealing part (3 a), the rod piece (1), the first cover body (51), the second cover body (52) and the end cover (2) are sequentially arranged from inside to outside, and the second cover body (52) is connected with the end cover (2).
4. The seal structure of claim 1, wherein: the sealing piece (6) comprises at least one group of sealing units, each sealing unit comprises a J-shaped sealing ring (60) and an O-shaped sealing ring (61), each J-shaped sealing ring (60) comprises a rectangular part (600) and a bending part (601), and each O-shaped sealing ring (61) is arranged between each sealing head (3) and each bending part (601).
5. The seal structure of claim 4, wherein: the sealing piece (6) comprises two groups of sealing units, and a rectangular sealing ring (62) is arranged between the two groups of sealing units.
6. The seal structure of claim 1, wherein: two dustproof rings (8) are further arranged between the sealing head (3) and the rod piece (1), and the two dustproof rings (8) are respectively positioned at two ends of the sealing head (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760505.1A CN107448607B (en) | 2017-08-30 | 2017-08-30 | Sealing structure of downhole tool test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760505.1A CN107448607B (en) | 2017-08-30 | 2017-08-30 | Sealing structure of downhole tool test device |
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| CN107448607A CN107448607A (en) | 2017-12-08 |
| CN107448607B true CN107448607B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710760505.1A Active CN107448607B (en) | 2017-08-30 | 2017-08-30 | Sealing structure of downhole tool test device |
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| CN (1) | CN107448607B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458919B (en) * | 2018-02-09 | 2024-04-05 | 中国石油大学(华东) | Sealing connection joint, cable crushing test system and connection method |
| US10502264B1 (en) * | 2018-08-22 | 2019-12-10 | General Electric Company | Ball plug retention for slewing ring bearing |
| CN112536732A (en) * | 2020-12-09 | 2021-03-23 | 格力电器（武汉）有限公司 | Tool for plugging interface of closed container |
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| JPH1137302A (en) * | 1997-07-17 | 1999-02-12 | Mitsubishi Heavy Ind Ltd | Shaft seal device for rotor |
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| CN203159124U (en) * | 2013-04-17 | 2013-08-28 | 济宁金世诺机电设备有限公司 | Balance jack for hydraulic support |
| CN203476313U (en) * | 2013-08-30 | 2014-03-12 | 深圳市弗赛特检测设备有限公司 | Novel torsion test shaft |
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| CN203641515U (en) * | 2014-01-16 | 2014-06-11 | 株洲时代新材料科技股份有限公司 | Hydraulic cylinder piston rod seal structure |
| CN204113183U (en) * | 2014-09-23 | 2015-01-21 | 甘肃蓝科石化高新装备股份有限公司 | A kind of sealing device of high temperature resistant compression test under super high pit shaft |
| CN104315149A (en) * | 2014-10-24 | 2015-01-28 | 中国工程物理研究院化工材料研究所 | Dynamic sealing structure resistant to high temperature and high pressure |
| CN106525602B (en) * | 2016-11-30 | 2019-06-11 | 合肥通用机械研究院有限公司 | One kind being used for the stretchable dynamic sealing device of high temperature and high pressure environment |
| CN207393945U (en) * | 2017-08-30 | 2018-05-22 | 武汉海王机电工程技术公司 | A kind of sealing structure of downhole tool experimental rig |
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|---|---|---|---|---|
| JPH0687782U (en) * | 1993-05-31 | 1994-12-22 | 三菱重工業株式会社 | mechanical seal |
| JPH1137302A (en) * | 1997-07-17 | 1999-02-12 | Mitsubishi Heavy Ind Ltd | Shaft seal device for rotor |
| RU2465502C1 (en) * | 2011-05-12 | 2012-10-27 | Общество с ограниченной ответственностью "Фирма "Радиус-Сервис" | Sealing cup |
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| CN107448607A (en) | 2017-12-08 |
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