CN117588181B - Sealing structure suitable for shearing flashboard of blowout preventer - Google Patents
Sealing structure suitable for shearing flashboard of blowout preventer Download PDFInfo
- Publication number
- CN117588181B CN117588181B CN202410069664.7A CN202410069664A CN117588181B CN 117588181 B CN117588181 B CN 117588181B CN 202410069664 A CN202410069664 A CN 202410069664A CN 117588181 B CN117588181 B CN 117588181B
- Authority
- CN
- China
- Prior art keywords
- supporting rod
- supporting
- sealing
- piece
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 81
- 238000010008 shearing Methods 0.000 title claims description 26
- 238000004073 vulcanization Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003345 natural gas Substances 0.000 abstract description 3
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
- E21B33/063—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams for shearing drill pipes
-
- 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
- F16J15/181—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings for plastic packings
-
- 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to a sealing structure suitable for a blowout preventer shear ram, which belongs to the technical field of petroleum and natural gas drilling safety control equipment, and comprises the following components: the framework comprises a first stay bar, a second stay bar and a supporting piece, and the first stay bar and the second stay bar are relatively distributed at intervals; the support piece is positioned between the first support rod and the second support rod in parallel, and one side edge of the support piece is fixed on the side wall of the first support rod; the sealing member is vulcanized and fixed on the top surfaces of the first supporting rod, the second supporting rod and the supporting sheet, and the bottom ends of the sealing member extend into and are vulcanized and fixed in the gap between the supporting sheet and the second supporting rod. According to the invention, the sealing piece is vulcanized and fixed on the top surfaces of the first supporting rod, the second supporting rod and the supporting piece and extends into a gap between the supporting piece and the second supporting rod, and the sealing piece is vulcanized and fixed in the gap between the supporting piece and the second supporting rod.
Description
Technical Field
The invention relates to the technical field of oil and natural gas drilling safety control equipment, in particular to a sealing structure suitable for a shearing flashboard of a blowout preventer.
Background
Once the wellhead pressure is out of control in the petroleum and natural gas drilling process, the phenomenon of out-of-control of the kick and even blowout can occur, so that normal drilling operation is impossible, drilling equipment is damaged or casualties are caused, the blowout preventer is key equipment for controlling the wellhead pressure and preventing the blowout in the drilling operation process, and the flashboard assembly is a core component for controlling the well pressure, wherein the blowout preventer further comprises a shearing and fully sealing flashboard assembly, and the blowout preventer can shear a drilling tool in a well when a blowout accident occurs and fully seal the wellhead, so that the accident is avoided.
At present, due to the limitation of the structural space of the shearing flashboard body, the sealing band of the commonly applied totally-enclosed shearing flashboard cutter body is narrower and is easy to cut, the glue containing amount is smaller, the loss of sealing rubber is serious in a high-temperature environment, the sealing reliability is reduced, and hidden danger is brought to the well control safety prevention and control.
Therefore, how to improve the cut resistance, high temperature resistance and sealing reliability of the shear ram seal of a blowout preventer is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a sealing structure suitable for a blowout preventer shear ram, which solves the technical problems of easy cutting, small glue containing amount and poor sealing performance of the existing blowout preventer shear ram sealing structure.
The sealing structure is suitable for the blowout preventer shear ram, and the blowout preventer shear ram comprises an upper shear ram and a lower shear ram which are opposite up and down, wherein the bottom surface of the upper shear ram is provided with a containing groove; comprising the following steps: a framework and a sealing piece are arranged on the framework,
the framework comprises a first supporting rod, a second supporting rod and supporting sheets, and the first supporting rod and the second supporting rod are distributed at intervals relatively; the supporting piece is positioned between the first supporting rod and the second supporting rod in parallel, and one side edge of the supporting piece is fixed on the side wall of the first supporting rod; the sealing element is vulcanized and fixed on the top surfaces of the first supporting rod, the second supporting rod and the supporting sheet, the bottom end of the sealing element stretches into and is vulcanized and fixed in a gap between the supporting sheet and the second supporting rod, and the first supporting rod, the second supporting rod, the supporting sheet and the sealing element are all arranged in the accommodating groove, and the top surface of the sealing element is in contact with the bottom of the accommodating groove.
The beneficial effects of the invention are as follows:
1. the sealing piece is vulcanized and fixed on the top surfaces of the first supporting rod, the second supporting rod and the supporting piece and extends into a gap between the supporting piece and the second supporting rod, and the sealing piece is vulcanized and fixed in the gap between the supporting piece and the second supporting rod;
2. the supporting piece contacts with the top surface of the lower shearing flashboard when the upper shearing flashboard and the lower shearing flashboard relatively slide, so that sliding friction force between the upper shearing flashboard and the lower shearing flashboard can be reduced, the smoothness of the relative sliding closure of the upper shearing flashboard and the lower shearing flashboard is improved, and the installation is smoother.
3. The bottom end of the sealing piece stretches into and is vulcanized and fixed in a gap between the supporting piece and the second supporting rod, and the sealing performance between the upper shearing flashboard and the lower shearing flashboard can be improved after the upper shearing flashboard and the lower shearing flashboard slide and are closed.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the skeleton still includes the connecting rod, the connecting rod is two and all pre-buried in the sealing member, two the one end interval of connecting rod is fixed on the opposite side edge that the supporting piece kept away from first vaulting pole and its other end interval is fixed on the lateral wall of second vaulting pole.
The sealing piece has the further beneficial effects that the two connecting rods are embedded in the sealing piece, one end of the connecting rods is fixed on the supporting piece, and the other end of the connecting rods is fixed on the second supporting rod, so that the loss speed of rubber of the sealing piece at high temperature can be slowed down, and the sealing piece is prevented from turning on one side.
Further, the cross section of the accommodating groove is of a trapezoid structure, and the cross section of the first supporting rod, the second supporting rod, the supporting piece, the connecting rod and the sealing piece after vulcanization and fixation is of a trapezoid structure.
The sealing structure with the trapezoid cross section is formed by vulcanizing and fixing the first supporting rod, the second supporting rod, the supporting piece, the connecting rod and the sealing piece, and can be placed in the accommodating groove in an adapting mode due to the fact that the cross section of the accommodating groove is also of the trapezoid structure, fixing pieces between the sealing structure and the accommodating groove are omitted, and the sealing structure is prevented from being separated from the accommodating groove.
Further, the framework further comprises error-proofing protruding blocks, error-proofing holes are formed in the inner groove walls of the accommodating grooves, and the error-proofing protruding blocks are fixed on the side walls of the first supporting rods far away from the second supporting rods or the side walls of the second supporting rods far away from the first supporting rods and are inserted into the error-proofing holes.
The anti-error hole is fixed in the anti-error hole by the anti-error protruding block, so that the sealing structure can be prevented from being reversely arranged in the accommodating groove, and the convenience and safety of the installation of the sealing structure are improved.
Further, the first stay bar, the second stay bar, the support sheet, the two connecting rods and the error-proofing protruding blocks are all made of metal materials.
Further, the longitudinal section of the supporting sheet is of a triangular structure, and the longest hypotenuse of the supporting sheet is fixed on the side wall of the first supporting rod.
The triangular effective sealing belt is formed by vulcanizing and combining the triangular supporting piece and the sealing piece, and the shape of the triangular effective sealing belt is the same as that of the cutter body and the effective sealing area is increased when the cutter body is sealed and the flashboard is formed to be bonded and sealed.
Further, the bottom end of the sealing member protrudes out of the gap between the support piece and the second stay.
The sealing device has the further beneficial effects that the sealing performance between the upper shearing flashboard and the lower shearing flashboard can be improved by utilizing the gap between the bottom end of the sealing piece extending out of the supporting piece and the second supporting rod.
Further, the height of the gap between the support piece and the second support rod, which extends from the bottom end of the sealing piece, is 1-2mm.
Further, the bottom end face of the sealing piece is provided with a glue containing groove with a strip-shaped structure.
The sealing piece is extruded by the lower shearing flashboard when the upper shearing flashboard and the lower shearing flashboard are relatively slid and closed, and at the moment, the extruded sealing piece rubber can be extruded into the accommodating groove due to the fact that the rubber accommodating groove is arranged on the bottom end face of the sealing piece, so that the sealing piece is prevented from being cut by the lower shearing flashboard.
Further, the sealing element is made of rubber.
Drawings
FIG. 1 is a schematic view of a seal structure for a shear ram of a blowout preventer in a bottom perspective;
FIG. 2 is a schematic bottom perspective view of a framework in a sealing structure for a shear ram of a blowout preventer in accordance with the present invention;
FIG. 3 is a schematic view of the internal structure of the upper shear ram mounted with a sealing structure suitable for use with the shear ram of a blowout preventer of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the frame comprises a frame body 11, a first supporting rod 12, a second supporting rod 13, supporting sheets 14, connecting rods 15, error-proof protruding blocks 2, sealing elements 21 and glue containing grooves.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, the sealing structure suitable for a shear ram of a blowout preventer comprises an upper shear ram and a lower shear ram which are opposite up and down, wherein the bottom surface of the upper shear ram is provided with a containing groove; comprising the following steps: the skeleton 1 and the sealing element 2,
the framework 1 comprises a first supporting rod 11, a second supporting rod 12 and supporting sheets 13, and the first supporting rod 11 and the second supporting rod 12 are distributed at intervals relatively; the supporting piece 13 is positioned between the first supporting rod 11 and the second supporting rod 12 in parallel, and one side edge of the supporting piece is fixed on the side wall of the first supporting rod 11; the sealing element 2 is fixed on the top surfaces of the first supporting rod 11, the second supporting rod 12 and the supporting piece 13 in a vulcanization mode, the bottom ends of the sealing element extend into gaps between the supporting piece 13 and the second supporting rod 12 in a vulcanization mode, the first supporting rod 11, the second supporting rod 12, the supporting piece 13 and the sealing element 2 are placed in the accommodating groove, and the top surface of the sealing element 2 is in contact with the bottom of the accommodating groove.
In some embodiments, the skeleton 1 may further include two connecting rods 14, where the two connecting rods 14 are both embedded in the sealing member 2, one end of each of the two connecting rods 14 is fixed on the other side edge of the supporting piece 13 away from the first supporting rod 11 at intervals, and the other end of each of the two connecting rods is fixed on the side wall of the second supporting rod 12 at intervals.
In some embodiments, the cross section of the accommodating groove may be a trapezoid structure, and the cross section of the first supporting rod 11, the second supporting rod 12, the supporting piece 13, the connecting rod 14 and the sealing member 2 after being vulcanized and fixed is a trapezoid structure.
In some embodiments, the framework 1 may further include a mistake-proofing bump 15, where the inner groove wall of the accommodating groove is provided with a mistake-proofing hole, and the mistake-proofing bump 15 is fixed on a side wall of the first stay 11 away from the second stay 12 or a side wall of the second stay 12 away from the first stay 11 and inserted into the mistake-proofing hole.
In some embodiments, the first stay 11, the second stay 12, the support piece 13, the two connecting rods 14, and the error-proof bump 15 may be made of metal materials.
In some embodiments, the support sheet 13 may have a triangular structure in longitudinal section and its longest hypotenuse is fixed to the side wall of the first stay 11.
In some embodiments, the bottom end of the seal 2 may extend out of the gap between the support tab 13 and the second stay 12.
In some embodiments, the height of the gap between the bottom end of the sealing member 2 extending out of the supporting piece 13 and the second supporting rod 12 may be 1-2mm.
In some embodiments, the bottom end surface of the sealing member 2 may be provided with an adhesive receiving groove 21 having an elongated structure.
In some embodiments, the seal 2 may be a rubber material.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (8)
1. The sealing structure comprises an upper shearing flashboard and a lower shearing flashboard which are opposite to each other, wherein the bottom surface of the upper shearing flashboard is provided with a containing groove; characterized by comprising the following steps:
the framework (1), the framework (1) comprises a first supporting rod (11), a second supporting rod (12) and supporting sheets (13), and the first supporting rod (11) and the second supporting rod (12) are distributed at intervals relatively; the supporting piece (13) is positioned between the first supporting rod (11) and the second supporting rod (12) in parallel, and one side edge of the supporting piece is fixed on the side wall of the first supporting rod (11);
the sealing piece (2) is fixed on the top surfaces of the first supporting rod (11), the second supporting rod (12) and the supporting piece (13) in a vulcanization mode, the bottom ends of the sealing piece extend into gaps between the supporting piece (13) and the second supporting rod (12) in a vulcanization mode, the first supporting rod (11), the second supporting rod (12), the supporting piece (13) and the sealing piece (2) are all arranged in the accommodating groove, and the top surfaces of the sealing piece (2) are in contact with the groove bottom of the accommodating groove;
the framework (1) further comprises two connecting rods (14), wherein the two connecting rods (14) are embedded in the sealing piece (2), one ends of the two connecting rods (14) are fixed on the other side edge of the supporting piece (13) far away from the first supporting rod (11) at intervals, and the other ends of the two connecting rods are fixed on the side wall of the second supporting rod (12) at intervals;
the longitudinal section of the supporting sheet (13) is of a triangular structure, and the longest hypotenuse of the supporting sheet is fixed on the side wall of the first supporting rod (11).
2. The sealing structure suitable for the shear ram of the blowout preventer according to claim 1, wherein the cross section of the accommodating groove is of a trapezoid structure, and the cross section of the first supporting rod (11), the second supporting rod (12), the supporting sheet (13), the connecting rod (14) and the sealing element (2) after vulcanization and fixation is of a trapezoid structure.
3. The sealing structure suitable for the shear ram of the blowout preventer according to claim 1, wherein the skeleton (1) further comprises error-proof protrusions (15), the inner groove wall of the accommodating groove is provided with error-proof holes, and the error-proof protrusions (15) are fixed on the side wall of the first stay bar (11) far away from the second stay bar (12) or the side wall of the second stay bar (12) far away from the first stay bar (11) and are inserted into the error-proof holes.
4. A sealing structure for a shear ram of a blowout preventer according to claim 3, wherein the first stay (11), the second stay (12), the support sheet (13), the two connecting rods (14) and the error proofing bump (15) are all of a metallic material.
5. A sealing arrangement for a shear ram of a blowout preventer according to claim 1, wherein the bottom end of the seal (2) protrudes out of the gap between the support plate (13) and the second strut (12).
6. A sealing arrangement for a shear ram of a blowout preventer according to claim 5, wherein the height of the gap between the support plate (13) and the second strut (12) from which the bottom end of the seal (2) extends is 1-2mm.
7. The sealing structure for the shear ram of the blowout preventer according to claim 1, wherein the bottom end surface of the sealing member (2) is provided with a glue containing groove (21) of an elongated structure.
8. A sealing arrangement for a shear ram of a blowout preventer according to claim 1, wherein the seal (2) is of rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410069664.7A CN117588181B (en) | 2024-01-18 | 2024-01-18 | Sealing structure suitable for shearing flashboard of blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410069664.7A CN117588181B (en) | 2024-01-18 | 2024-01-18 | Sealing structure suitable for shearing flashboard of blowout preventer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117588181A CN117588181A (en) | 2024-02-23 |
| CN117588181B true CN117588181B (en) | 2024-03-22 |
Family
ID=89913606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410069664.7A Active CN117588181B (en) | 2024-01-18 | 2024-01-18 | Sealing structure suitable for shearing flashboard of blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117588181B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347898A (en) * | 1980-11-06 | 1982-09-07 | Cameron Iron Works, Inc. | Shear ram blowout preventer |
| CN201474651U (en) * | 2009-07-21 | 2010-05-19 | 河北华北石油荣盛机械制造有限公司 | Drill stem cutting flashboard |
| CN201826806U (en) * | 2010-11-03 | 2011-05-11 | 上海神开石油化工装备股份有限公司 | Sulfur-resisting shear ram applied to blowout preventer in oil and gas drilling |
| CN104790899A (en) * | 2015-05-06 | 2015-07-22 | 河北华北石油荣盛机械制造有限公司 | Anti-hydrothion shear ram used for blowout preventer |
| CN215169876U (en) * | 2021-02-26 | 2021-12-14 | 河北华北石油荣盛机械制造有限公司 | End surface type sealing shearing flashboard for flashboard blowout preventer |
-
2024
- 2024-01-18 CN CN202410069664.7A patent/CN117588181B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347898A (en) * | 1980-11-06 | 1982-09-07 | Cameron Iron Works, Inc. | Shear ram blowout preventer |
| CN201474651U (en) * | 2009-07-21 | 2010-05-19 | 河北华北石油荣盛机械制造有限公司 | Drill stem cutting flashboard |
| CN201826806U (en) * | 2010-11-03 | 2011-05-11 | 上海神开石油化工装备股份有限公司 | Sulfur-resisting shear ram applied to blowout preventer in oil and gas drilling |
| CN104790899A (en) * | 2015-05-06 | 2015-07-22 | 河北华北石油荣盛机械制造有限公司 | Anti-hydrothion shear ram used for blowout preventer |
| CN215169876U (en) * | 2021-02-26 | 2021-12-14 | 河北华北石油荣盛机械制造有限公司 | End surface type sealing shearing flashboard for flashboard blowout preventer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117588181A (en) | 2024-02-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5515916A (en) | Blowout preventer | |
| US6158505A (en) | Blade seal for a shearing blind ram in a ram type blowout preventer | |
| CA2434629C (en) | Shear ram assembly | |
| GB2051927A (en) | Oil well blowout preventer with shearing and sealing rams | |
| EP1985795B1 (en) | Blow out preventer | |
| WO2006058244A3 (en) | Shear/seal ram assembly for a ram-type blowout prevention system | |
| CN101748986B (en) | Bidirectional flashboard BOP and method | |
| MX2007000532A (en) | Shearing sealing ram. | |
| CA2512292A1 (en) | Unitary blade seal for a shearing blind ram in a ram type blowout preventer | |
| GB2174445A (en) | Shear ram apparatus | |
| CN117588181B (en) | Sealing structure suitable for shearing flashboard of blowout preventer | |
| CN201474651U (en) | Drill stem cutting flashboard | |
| US7975761B2 (en) | Method and device with biasing force for sealing a well | |
| US20200332617A1 (en) | Blowout Preventer Shearing Ram | |
| CN215169876U (en) | End surface type sealing shearing flashboard for flashboard blowout preventer | |
| US20180045011A1 (en) | Packer Assembly with Inserts for Blowout Preventer | |
| US9976374B2 (en) | Side packer assembly with support member for ram blowout preventer | |
| CN208777473U (en) | Assembling thermal-insulating wall board | |
| CN202832355U (en) | Shear band blank ram of hydraulic blowout preventer | |
| KR20190122885A (en) | Blowout prevention system with blind sheer ram | |
| CN221278451U (en) | Waterproof structure | |
| CN215949422U (en) | Shear flashboard structure | |
| CN220285708U (en) | Blowout preventer for drilling and repairing well | |
| CN217581860U (en) | Prefabricated window structure convenient to change fixed glass | |
| CN113323617B (en) | Novel variable-diameter gate plate rubber core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |