CN107288567B - Retractable type milling and fishing integrated device and fishing method thereof - Google Patents
Retractable type milling and fishing integrated device and fishing method thereof Download PDFInfo
- Publication number
- CN107288567B CN107288567B CN201710678518.4A CN201710678518A CN107288567B CN 107288567 B CN107288567 B CN 107288567B CN 201710678518 A CN201710678518 A CN 201710678518A CN 107288567 B CN107288567 B CN 107288567B
- Authority
- CN
- China
- Prior art keywords
- slip
- milling
- fish
- fishing
- release ring
- 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
- 238000003801 milling Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 21
- 241000251468 Actinopterygii Species 0.000 claims abstract description 58
- 238000005553 drilling Methods 0.000 claims description 37
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
Images
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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/16—Grappling tools, e.g. tongs or grabs combined with cutting or destroying means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Abstract
The invention discloses a retractable type milling and fishing integrated device and a fishing method thereof, wherein the device comprises a slip outer barrel and an upper joint connected to the upper end of the slip outer barrel, a milling shoe is connected to the lower end of the slip outer barrel, the upper end of a release ring is in threaded connection with the inside of the slip outer barrel, a group of key grooves are uniformly distributed at the lower end of the release ring, a group of second semi-circular arc-shaped bosses which correspond to the key grooves and are provided with downward arc ends are uniformly distributed on the outer wall of the upper end of the slip, the release ring is in sliding connection with the slip through the key grooves and the second semi-circular arc-shaped bosses, and a first semi-circular arc-shaped boss with upward arc ends is arranged on the inner side of the lower end of a separation strip between the key grooves. The slip can grab and fish the fish in the process of milling the top of the fish to complete milling and realize fishing, the fishing slip always grabs and fishes in the fishing process, the fish cannot fall off the well bottom after milling, and the slip cannot rotate along with the milling sleeve in the milling process, so that the slip can be prevented from being damaged, and the processing cost is reduced.
Description
Technical Field
The invention relates to a retractable type milling and fishing integrated device, and belongs to the technical field of underground fishing tools.
Background
With the continuous deepening of the oil and gas exploitation technology, accidents that fish fall off from the well bottom due to the fact that drill strings, oil pipes are broken and the like are likely to happen in the oil and gas drilling and development processes, once the fish fall accidents happen, the fish must be salvaged, when the fish fall is irregular, the fish must be salvaged after being ground and milled in a sleeving mode, and the permanent packer must be salvaged after being ground and milled in the sleeving mode. At present, most of the existing underground fishing operations need to be finished after being milled and fished, and the existing underground fishing operations need to be finished after being drilled twice, so that the time and the labor are consumed. The existing fishing integrated tool at home and abroad is relatively complex in structure, and firstly, the processing difficulty is high; secondly, the processing cost is high; thirdly, the structure is complex, and the operation difficulty is high when in use; fourthly, the technical requirements on the drilling workers are high, and the drilling workers can be operated only after professional training.
Disclosure of Invention
The invention aims to provide a retractable type milling and fishing integrated device and a fishing method thereof, which have the advantages of simple structure, convenience in operation and high fishing efficiency, overcome the defects in the prior art and are suitable for milling and fishing of permanent packers.
The technical scheme of the invention is as follows: a retractable type milling and fishing integrated device comprises an external part and an internal part, wherein the external part consists of an upper joint, a slip outer cylinder and a milling shoe, the internal part consists of a release ring and a slip, the upper end of the slip outer cylinder is in threaded connection with the upper joint, the lower end of the slip outer cylinder is connected with the milling shoe, and the release ring and the slip are arranged in the slip outer cylinder; the lower end of the release ring is provided with a group of uniformly distributed key grooves and a group of uniformly distributed separation strips, and the lower end of the inside of each separation strip is provided with a first semicircular arc-shaped boss; a group of second semi-circular arc-shaped bosses are uniformly distributed on the outer wall of the upper end of the slip, and the arc ends of the second semi-circular arc-shaped bosses are opposite to the arc end of the first semi-circular arc-shaped boss; the upper end of the slip is inserted into the release ring, and the second semi-circular arc-shaped boss on the slip is in sliding connection with the key groove on the release ring.
The diameter of the inner cavity at the lower end of the release ring is larger than the outer diameter of the second semi-circular arc-shaped boss, so that the second semi-circular arc-shaped boss of the slip can rotate in the inner cavity after entering the inner cavity of the release ring.
The lower end of the slip is provided with an outer conical surface, and an inner conical surface matched with the outer conical surface is arranged in the slip outer barrel.
And the inner wall of the lower end of the slip is provided with left-handed spiral teeth.
The milling shoe is of an impregnated type, and hard alloy sheets and hard alloy particles are respectively welded inside, at the end part and outside the front end of the milling shoe.
Meanwhile, the invention also provides a salvaging method for the retractable type milling and salvaging integrated device, which comprises the steps of firstly connecting the retractable type milling and salvaging integrated device below a drilling tool, then lowering the retractable type milling and salvaging integrated device to the top of a fish falling in a well, rotating the drilling tool, milling the top of the fish falling through a milling shoe at the lower end of an outer cylinder of a slip, then continuously pressing the drilling tool downwards to enable the milled fish falling to enter the slip, wherein a second semi-circular arc-shaped boss of the slip can be screwed into an inner cavity of a release ring, so that the slip and the release ring are mutually separated, the free rotation of the drilling tool at the upper part is realized, the slip and the fish falling cannot rotate at the bottom of the well, and the slip tightly grabs the fish falling all the time in the milling process, and the fish cannot fall off after being milled; after the top of the whole fish is milled, the drilling tool is lifted to perform fishing operation, in the lifting process, when the arc end of the first semicircular arc-shaped boss of the release ring is contacted with the arc end of the second semicircular arc-shaped boss on the slip, the second semicircular arc-shaped boss of the slip can automatically slide into the key groove of the release ring, the slip can slide up and down relative to the release ring at the moment, then the drilling tool is lifted continuously, the outer conical surface at the lower end of the slip is attached to the inner conical surface in the slip outer cylinder, and the inner conical surface can force the slip to firmly grasp the fish in the lifting process of the slip outer cylinder, so that the fish can be fished.
According to the method, when the fish can not be fished, the drilling tool is pressed down again, the drilling tool is lifted up for fishing after a section of milling is completed, finally the fish can not be fished, the drill string can be pressed down, the slips grasping the fish can be loosened from the slip outer barrel, then the drilling tool is slowly rotated forward and lifted up, when the second semi-circular-arc-shaped boss of the slips is flush with the first semi-circular-arc-shaped boss of the release ring, the slips and the release ring form a spline connection, the applied torque of the upper drilling tool can be transmitted to the slips, the inner wall of the lower end of the slips is provided with the left-handed spiral teeth, and the slips can be withdrawn from the fish by rotating forward and lifting up.
Due to the adoption of the technical scheme, the invention has the advantages that: the slip type well repairing device can grab and fish the fish in the process of milling the top of the fish to complete milling and realize fishing, the slip always grabs and drags the fish in the process of milling, the fish cannot fall off the well bottom after milling, and the slip cannot rotate along with the milling sleeve in the process of milling, so that the slip cannot be damaged, the reliability of fishing is ensured, the fishing cost is reduced, and the well repairing efficiency is improved. In addition, under the condition that fishing of the fish is unsuccessful, the axial movement and the circumferential rotation of the slips are realized by means of the release ring and the semi-circular arc-shaped boss of the slips, so that the casing milling tool and the drilling tools above the casing milling tool can be directly withdrawn, and the device and the drilling tools at the upper part can be safely withdrawn. Therefore, the invention has the advantages of simple and convenient operation, convenient use, safety and reliability, simplifies the operation flow of going into the well, realizes the integration of milling and salvaging, and improves the salvaging efficiency.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the release ring and slip assembly;
FIG. 4 is a schematic view of the release ring;
FIG. 5 is a schematic view of the slip construction.
Description of reference numerals: 1-upper joint, 2-release ring, 3-slips, 4-slips outer barrel, 5-milling shoe, 6-left-handed helical tooth, 7-keyway, 8-second semi-circular arc boss, 9-parting strip, 10-first semi-circular arc boss, 11-external conical surface, 12-internal conical surface and 13-inner cavity.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment of the invention comprises the following steps: the retractable type milling and fishing integrated device is shown in figures 1-5 and comprises an external part and an internal part, wherein the external part consists of an upper connector 1, a slip outer cylinder 4 and a milling shoe 5, the internal part consists of a release ring 2 and a slip 3, the upper end of the slip outer cylinder 4 is in threaded connection with the upper connector 1, the lower end of the slip outer cylinder 4 is connected with the milling shoe 5, and the release ring 2 and the slip 3 are arranged in the slip outer cylinder 4; the lower end of the release ring 2 is provided with a group of uniformly distributed key grooves 7 and a group of uniformly distributed dividing strips 9, and the lower end in the dividing strips 9 is provided with a first semicircular arc-shaped boss 10; a group of second semi-circular arc-shaped bosses 8 are uniformly distributed on the outer wall of the upper end of the slip 3, and the arc ends of the second semi-circular arc-shaped bosses 8 are opposite to the arc end of the first semi-circular arc-shaped boss 10; the upper end of the slip 3 is inserted into the release ring 2 and a second semi-circular arc shaped boss 8 on the slip 3 is in sliding connection with a keyway 7 on the release ring 2. The diameter of the inner cavity 13 at the lower end of the release ring 2 is larger than the outer diameter of the second semi-circular arc-shaped boss 8, so that the second semi-circular arc-shaped boss 8 of the slip 3 can rotate in the inner cavity 13 after entering the inner cavity 13 of the release ring 2. The lower end of the slip 3 is provided with an external conical surface 11, and an internal conical surface 12 matched with the external conical surface 11 is arranged in the slip outer cylinder 4. And a left-handed helical tooth 6 is arranged on the inner wall of the lower end of the slip 3. The milling shoe 5 is of an impregnated type, and hard alloy sheets and hard alloy particles are respectively welded inside, at the end part and outside the front end of the milling shoe 5.
The working principle of the invention is as follows: the retractable type milling and fishing integrated device is connected below a drilling tool and then is placed at the top of a fish falling in a well, the drilling tool is rotated, the top of the fish falling is milled through a milling shoe 5 at the lower end of a slip outer barrel 4, then the drilling tool is continuously pressed downwards, the milled fish falling enters a slip 3, a second semi-circular arc-shaped boss 8 of the slip 3 can be screwed into an inner cavity 13 of a release ring 2 at the moment, the slip 3 and the release ring 2 are separated from each other, the upper portion drilling tool can rotate freely, the slip 3 and the fish falling can not rotate, the upper portion drilling tool can rotate freely, the slip 3 and the fish falling cannot rotate, the slip 3 can clamp the fish falling and form a whole with the fish falling, therefore, in the milling process, only an external tool rotates, the slip 3 is in a non-rotating state, and damage to the slip 3 is avoided. In the milling process, the slips 3 tightly hold the fish all the time, so that the fish cannot fall to the bottom of the well after being milled; after the top of the whole fish is milled, the drilling tool is lifted to perform fishing operation, in the lifting process, when the arc end of the first semicircular arc-shaped boss 10 of the release ring 2 is contacted with the arc end of the second semicircular arc-shaped boss 8 on the slip 3, the second semicircular arc-shaped boss 8 of the slip 3 can automatically slide into the key groove 7 of the release ring 2, at the moment, the slip 3 can slide up and down relative to the release ring 2, then the drilling tool is lifted continuously, the outer conical surface 11 at the lower end of the slip 3 is attached to the inner conical surface 12 in the slip outer cylinder 4, and the inner conical surface 12 can force the slip 3 to firmly grasp the fish in the process of lifting the slip outer cylinder 4, so that the fish can be fished.
When the fish is not fished, the drilling tool is pressed down again, the drilling tool is lifted up and fished after one section of milling, finally, the fish cannot be fished, the drill string can be pressed down, the slips 3 grasping the fish are loosened with the slip outer barrel 4, then the drilling tool is slowly rotated forward and lifted up, when the second semi-arc-shaped boss 8 of the slips 3 is flush with the first semi-arc-shaped boss 10 of the release ring 2, the slips 3 and the release ring 2 form spline connection, the applied torque of the upper part drilling tool can be transmitted to the slips 3, the inner wall of the lower end of the slips 3 is provided with left-handed spiral teeth 6, and the slips 3 can be withdrawn from the fish by rotating forward and lifting.
Claims (7)
1. The utility model provides an integrated device is salvaged to formula milling that can move back, includes external component and internal component, the external component constitute by top connection (1), slips urceolus (4) and milling shoes (5), the internal component comprises release ring (2) and slips (3), its characterized in that: the upper end of the slip outer cylinder (4) is in threaded connection with the upper joint (1), the lower end of the slip outer cylinder (4) is connected with a milling shoe (5), and a release ring (2) and a slip (3) are arranged inside the slip outer cylinder (4); the lower end of the release ring (2) is provided with a group of uniformly distributed key slots (7) and a group of uniformly distributed partition strips (9), and the lower end in the interior of each partition strip (9) is provided with a first semicircular arc-shaped boss (10); a group of second semi-circular arc bosses (8) are uniformly distributed on the outer wall of the upper end of the slip (3), and the arc ends of the second semi-circular arc bosses (8) are opposite to the arc end of the first semi-circular arc boss (10); the upper end of the slip (3) is inserted into the release ring (2), and a second semi-circular arc-shaped boss (8) on the slip (3) is in sliding connection with a key groove (7) on the release ring (2).
2. The integrated milling and fishing device of claim 1, wherein: the diameter of an inner cavity (13) at the lower end of the release ring (2) is larger than the outer diameter of the second semi-circular arc boss (8).
3. The integrated milling and fishing device of claim 1, wherein: the lower end of the slip (3) is provided with an external conical surface (11), and an internal conical surface (12) matched with the external conical surface (11) is arranged in the slip outer cylinder (4).
4. The integrated retractable type milling and fishing device of claim 1, wherein: and the inner wall of the lower end of the slip (3) is provided with left-handed spiral teeth (6).
5. The integrated retractable type milling and fishing device of claim 1, wherein: the milling shoe (5) is of an impregnated type, and hard alloy sheets and hard alloy particles are respectively welded inside, at the end part and outside the front end of the milling shoe (5).
6. A fishing method using the retractable type milling and fishing integrated device as claimed in any one of claims 1 to 5, characterized in that: the method comprises the steps that firstly, a retractable type milling and fishing integrated device is connected below a drilling tool, then the drilling tool is placed at the top of a fish falling in a well, the drilling tool is rotated, the top of the fish falling is milled through a milling shoe (5) at the lower end of a slip outer cylinder (4), then the drilling tool is pressed downwards continuously, the milled fish falling enters a slip (3), at the moment, a second semi-circular arc-shaped boss (8) of the slip (3) can be screwed into an inner cavity (13) of a release ring (2), the slip (3) and the release ring (2) are separated from each other, the upper drilling tool can rotate freely, the slip (3) and the fish falling cannot rotate, the slip (3) can hold the fish falling all the time in the milling process, and the fish falling cannot fall to the well bottom after being milled; after the top of the whole fish is milled, the drilling tool is lifted to perform fishing operation, in the lifting process, when the arc end of the first semicircular arc-shaped boss (10) of the release ring (2) is contacted with the arc end of the second semicircular arc-shaped boss (8) on the slip (3), the second semicircular arc-shaped boss (8) of the slip (3) can automatically slide into the key groove (7) of the release ring (2), at the moment, the slip (3) can slide up and down relative to the release ring (2), then the drilling tool is continuously lifted, the outer conical surface (11) at the lower end of the slip (3) is attached to the inner conical surface (12) in the slip outer cylinder (4), and the inner conical surface (12) can force the slip (3) to firmly grasp the fish in the lifting process of the slip outer cylinder (4), so that the fish can be fished.
7. The fishing method of the retractable type milling and fishing integrated device according to claim 6, characterized in that: when the fish cannot be fished, the drilling tool is pressed down again, the drilling tool is lifted up and fished after being milled for one section, and finally when the fish cannot be fished, the drill string can be pressed down, the slips (3) grasping the fish are loosened from the slip outer barrel (4), then the drilling tool is slowly rotated forward and lifted up, when the second semi-circular arc-shaped boss (8) of the slips (3) is flush with the first semi-circular arc-shaped boss (10) of the release ring (2), the slips (3) and the release ring (2) form spline connection, the applied torque of the drilling tool at the upper part can be transmitted to the slips (3), the left-handed spiral teeth (6) are arranged on the inner wall of the lower end of the slips (3), and the slips (3) can be withdrawn from the fish by rotating forward and lifting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710678518.4A CN107288567B (en) | 2017-08-10 | 2017-08-10 | Retractable type milling and fishing integrated device and fishing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710678518.4A CN107288567B (en) | 2017-08-10 | 2017-08-10 | Retractable type milling and fishing integrated device and fishing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107288567A CN107288567A (en) | 2017-10-24 |
| CN107288567B true CN107288567B (en) | 2023-04-07 |
Family
ID=60105762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710678518.4A Active CN107288567B (en) | 2017-08-10 | 2017-08-10 | Retractable type milling and fishing integrated device and fishing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107288567B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425652A (en) * | 2018-01-17 | 2018-08-21 | 中国石油化工股份有限公司 | Milling guide shoe and the fishing socket for using the milling guide shoe |
| CN109469458A (en) * | 2018-09-27 | 2019-03-15 | 核工业北京地质研究院 | A kind of circlip type fisher and its Refloatation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201090165Y (en) * | 2007-08-27 | 2008-07-23 | 华北石油管理局钻井工艺研究院 | Drilling bridging plug milling salvaging tool |
| WO2014066238A1 (en) * | 2012-10-26 | 2014-05-01 | Baker Hughes Incorporated | One trip packer plug debris milling and removal method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2651424Y (en) * | 2003-08-29 | 2004-10-27 | 辽河石油勘探局工程技术研究院 | Reversible composite milling and fishing tool |
| CA2527390C (en) * | 2005-11-15 | 2010-07-27 | Lee Oilfield Service Ltd. | Downhole fishing extension sub with cutting elements therein |
| CN201013287Y (en) * | 2007-03-01 | 2008-01-30 | 华北石油管理局 | Retrievable fishing barrel for reclaiming bridging plug |
| CN201090166Y (en) * | 2007-09-04 | 2008-07-23 | 中国石油天然气集团公司 | Salvaging callback cover mill shoe multiple-limb well |
| CN201100111Y (en) * | 2007-09-29 | 2008-08-13 | 华北石油管理局 | Removable card tile bushing hoping and positioning wrecker |
| CN202284458U (en) * | 2011-11-11 | 2012-06-27 | 通化市远通石油机械有限责任公司 | Sealed backoff fishing spear |
| CN104499979B (en) * | 2014-12-29 | 2017-06-20 | 贵州高峰石油机械股份有限公司 | It is changed without the method and device that slips salvages different-diameter fish |
| CN105422035A (en) * | 2015-12-25 | 2016-03-23 | 贵州高峰石油机械股份有限公司 | Double-release sliding sleeve type bowl slip-socket and underground falling-object catching method |
| CN207420520U (en) * | 2017-08-10 | 2018-05-29 | 贵州高峰石油机械股份有限公司 | A kind of reversible covers milling fishing integrated device |
-
2017
- 2017-08-10 CN CN201710678518.4A patent/CN107288567B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201090165Y (en) * | 2007-08-27 | 2008-07-23 | 华北石油管理局钻井工艺研究院 | Drilling bridging plug milling salvaging tool |
| WO2014066238A1 (en) * | 2012-10-26 | 2014-05-01 | Baker Hughes Incorporated | One trip packer plug debris milling and removal method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107288567A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107313734B (en) | Windowing side drilling tool and windowing method thereof | |
| CN107288567B (en) | Retractable type milling and fishing integrated device and fishing method thereof | |
| CN207420520U (en) | A kind of reversible covers milling fishing integrated device | |
| CA2904632C (en) | Systems and methods for tubular engagement and manipulation | |
| CN206608118U (en) | A kind of remote auto control hydraulic-driven external clamping type sleeve pipe clamping head | |
| CN209129577U (en) | A kind of 7 " non-rotating gravity set packers of limited times | |
| CN114293942B (en) | Milling and cutting integrated device for coiled tubing salvaging sleeve | |
| CN203362092U (en) | Retractable fishing cylinder | |
| CN216360987U (en) | Hydraulic fishing mechanical cutting multifunctional tool for coiled tubing | |
| CN201439694U (en) | Taking and changing sleeve cutting salvage device | |
| CN210460595U (en) | Scraper controllable drilling plug-drifting-wall scraping integrated device | |
| CN209761384U (en) | Device for simultaneously completing fishing and sealing operations of submarine oil well | |
| CN202731807U (en) | Downhole fishing tool | |
| CN211648060U (en) | Drilling and grinding integrated overshot for oil well packer and bridge plug | |
| CN207144888U (en) | A kind of a wide range of fishing spear | |
| CN201367880Y (en) | Telescoping spear | |
| CN214365880U (en) | Recyclable hydraulic sitting and hanging guider | |
| CN111677473B (en) | Rotatable fishing barrel used under coal mine and fishing method thereof | |
| CN213016267U (en) | Returnable double-slip overshot | |
| CN212249929U (en) | Fishing spear | |
| CN214787286U (en) | Reversing fishing spear for workover operation | |
| CN207660577U (en) | A kind of gear wheel fishing tool | |
| CN214464027U (en) | Casing hanging weight cutting fisher | |
| CN2219957Y (en) | Hanging device for whipstock | |
| CN213116232U (en) | Fishing spear for fish |
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 |