CN101294489B - Apparatus for testing applied force and displacement of down-hole tubular pile - Google Patents
Apparatus for testing applied force and displacement of down-hole tubular pile Download PDFInfo
- Publication number
- CN101294489B CN101294489B CN2007100542749A CN200710054274A CN101294489B CN 101294489 B CN101294489 B CN 101294489B CN 2007100542749 A CN2007100542749 A CN 2007100542749A CN 200710054274 A CN200710054274 A CN 200710054274A CN 101294489 B CN101294489 B CN 101294489B
- Authority
- CN
- China
- Prior art keywords
- hole
- circuit board
- swing arm
- main body
- main circuit
- 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
Images
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a stress and displacement detection device for underground pipe columns. The device is of a tubular structure, the head and the tail ends of which are an upper joint and a lower joint. A switching bin, a stress sensor, a temperature sensor, a pressure sensor, a main circuit board and batteries are arranged in the tube wall of the tubular structure, wherein the pressure sensor is installed at the place communicating with a central pipe, and the other parts are sealed inside the tube wall in a dismountable manner; a switch is arranged in the switching bin; the sensors and the switch are respectively connected with the main circuit board via different transmission lines; a groove is formed on the outer wall of the tubular structure; a pressure injection unlock creep displacement detector is arranged in the groove , the external side thereof does not exceed the outside edge of the device, and the pressure injection unlock creep displacement detector is connected with the main circuit board through the transmission line thereof. The displacement data of the pipe column can be calculated based on the data of temperature, stress and pressure recorded and stored bythe integration of the temperature sensor, the stress sensor and the pressure sensor entering into the well along with injection pipe columns.
Description
Technical field
The invention belongs to detecting instrument technical field under the oil well, relate to the stressed and stressed checkout gear that changes back kit wriggling displacement of a kind of oil field down-hole string.
Background technology
When the oil well lower tubular column is worked under the HTHP of middle-deep well down-hole, stressed more complicated, particularly tubing string such as seperated layer water injection, separate layer acid treatment; Working procedure is many, and the work progress pressure range is big, and operation pressure reaches as high as and reaches 40MPa; And stop annotating or during anti-flushing well pressure can drop to zero, and injection process temperature when stopping annotating also changes frequent pressure and temperature fluctuation simultaneously; Cause stressed variation of tubing string and wriggling, therefore, stressed when the Displacement Analysis to the kit packer; Need comprehensive effects such as account temperature effect, piston effect, helical effect, flow velocity effect, frictional force, because downhole conditions is complicated, the wriggling displacement of the stressed back of tubing string packer is difficult to accurately judge and calculate; Can only release through Theoretical Calculation at present, Theoretical Calculation and actual conditions difference size can't be verified, so the design of down-hole string is influenced; When running into downhole packer card envelope position hour; Be difficult to accurately design tubing string, also can't reasonable dismissal when tubing string lost efficacy, also do not survey the device of the stressed and displacement of down-hole string at present.
Summary of the invention
The object of the present invention is to provide a kind of accurately, convenient, can detect and can store the device of data oil field down-hole string actual loading, wriggling displacement.
Technical scheme of the present invention is: the stressed and displacement detector of a kind of down-hole string; This device is tubular structure, and the two ends of tubular structure are upper and lower joint, are provided with switch storehouse, strain gauge, temperature pick up, pressure sensor, main circuit board and battery in the tubular structure tube wall; Wherein pressure sensor is assemblied in the position that is communicated with central tube; In tube wall, switch has switch in the storehouse to all the other each several parts by removable seal, and the transmission line that the sensor and switch pass through separately respectively links to each other with main circuit board; Have groove on the outer wall of tubular structure; Be provided with in the groove to annotate and press release pipeline wriggling displacement detector, its outside does not exceed the outermost edges of device, annotates and presses its transmission line that passes through of release pipeline wriggling displacement detector to link to each other with main circuit board.
Annotate and press release pipeline wriggling displacement detector to constitute by the swing arm of axial setting, the amount wheel mechanism and the Hall element of measurement tubing string displacement; Swing arm one end is rotatably connected on the wall body; The amount wheel mechanism is arranged on the swing arm other end; Hall element sealing is arranged on and measures in the tube wall of wheel mechanism correspondence position, be respectively equipped with in the tube wall between the swing arm two ends outside promotion swing arm penetrating mechanism, keep swing arm and be close to the notes of main body and press release mechanism.
Described amount wheel mechanism comprises the amount wheel shaft that is fixed on the swing arm end, the amount wheel of measuring rotation assembling on the wheel shaft, and amount is taken turns upward and is evenly equipped with magnetic patch at circumferencial direction.
Described penetrating mechanism comprises and pushes away spring, pushes away spring one end and is arranged on the tube wall, and the other end is fixed in the swing arm.
Described notes press release mechanism to be made up of the control spring and the piston pin that set gradually in the L shaped through hole of the level that is provided with in the snap close of swing arm middle inside setting, the tube wall corresponding with snap close, the through hole; Snap close inserts from through hole one end; The other end of through hole is provided with seal plug; Set gradually control spring and piston pin in the through hole in the seal plug, piston pin one end is fitted on the control spring, and the other end is inserted in the lockhole of snap close.
Said tubular structure is made up of main body and upper and lower joint; Wherein the upper and lower end portion of main body respectively with upper and lower joint fixed seal connection, be set with central tube in upper and lower joint and the main body, central tube upper end and top connection fixed seal connection; Its bottom is connected with the lower contact slipper seal; In the tube wall of main body or upper and lower joint strain gauge, temperature pick up, pressure sensor, main circuit board and battery are set, have groove on the top connection outer wall, be provided with strain gauge and switch storehouse in the groove; The groove external fixation has the sheath with its sealing, and strain gauge pastes on the groove inwall.
Main circuit board and battery are set in the cavity that forms between main body, central tube and the lower contact, and main circuit board, battery are separately fixed on the main body lower surface through bolt.
The present invention is temperature, pressure, the stressed and wriggling displacement parameter of production wells lower tubular column in real time; To the influence of downhole tool reliable basis is provided to the real force analysis of research layering squeeze note tubing string, research and correction tubing string stress model, research down-hole string wriggling; The optimal design and raising technology success rate that help downhole tool and tubing string; Can prolong the tubing string period of validity, reduce invalid operating cost.
The present invention is screwed on the tubing string and goes into the well with tubing string, and after the water filling pressurization, swing arm is ejected; The amount wheel is attached on the casing wall, and during the displacement of the stressed generation wriggling of tubing string, the amount wheel rotates; Hall element receives the magnetic signal that the magnetic post produces, and is transferred to main circuit board through the hall sensing line, and tubing string is when different temperatures and the variation of pressure lower stress simultaneously; Temperature pick up, strain gauge, pressure sensor are given main circuit board with the transfer of data of accepting; After the present invention took out, the data transmission port in the switch storehouse was plugged transmission line and is connected with computer, can image data be transferred on the computer.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is the B-B generalized section of Fig. 1;
Fig. 4 is that the C of Fig. 1 is to lateral view;
Fig. 5 is the D-D generalized section of Fig. 2;
Fig. 6 is the local I enlarged diagram of Fig. 1;
Fig. 7 is the E-E sectional view of Fig. 6;
Fig. 8 is the present invention's tubing string sketch map when underground work;
Fig. 9 is the present invention's duty local I enlarged diagram in sleeve pipe.
The specific embodiment
As shown in Figure 1, the stressed and displacement detector of a kind of down-hole string comprises the main body 7 and upper and lower joint 1,13 of tubulose; Wherein the upper and lower end portion of main body 7 is spirally connected with upper and lower joint 1,13 respectively, is set with central tube 6 in upper and lower joint 1,13 and the main body 7, and central tube 6 upper ends and top connection 1 are spirally connected; Its bottom is provided with outer lug boss 30, and outer lug boss 30 is connected with lower contact 13 slipper seals, has groove C1 on top connection 1 outer wall; Groove C1 is provided with the tubular sheath 2 with groove C1 sealing outward; Sheath 2 upper ends and top connection 1 top are spirally connected, and its bottom and top connection 1 bottom are slidingly connected, and above-mentioned junction all is provided with the sealing ring sealing.
Like Fig. 1,2,4,5, shown in 6, have groove C2 on the main body outer wall, be provided with in the groove C2 to annotate and press release pipeline wriggling displacement detector; Its outside does not exceed the outermost edges of device, and this detector comprises the swing arm 17 of vertical setting, and the upper end of swing arm 17 is divided into two support arm 17-1,17-2; The amount of being provided with wheel shaft 15 between two support arm 17-1, the 17-2; An inclined to one side slightly side amount of the being fixed with wheel 16 in amount wheel shaft 15 middle parts is uniformly distributed with 4～6 magnetic posts 23 along the circumference on the amount wheel 16, on magnetic post 23 amounts of the being bonded in wheel 16; Main body 7 upper edges amount wheel shaft 15 axis between amount wheel 16 and support arm 17-1 symmetry up and down have inclined to one side hole K2; Hole K2 axis is parallel with amount wheel 16 wheel faces partially, in the K2 of hole 22, two Hall elements of Hall element, 22 record amounts is installed partially and takes turns the magnetic signal that 16 upper magnetic posts 23 send; Hole K2 port is bolted with the fixedly screw 21 of Hall element 22 partially; Screw 21 ends are pressed with sealing ring 33, and Hall element 22 is sealed in the inclined to one side hole K2, and Hall element 22 is connected with main circuit board 9 through hall sensing line 14.
Like Fig. 4,6, shown in 7, swing arm 17 lower ends are provided with arm shaft 25, and arm shaft 25 is installed on the main body 7; Swing arm 17 can be rotated around arm shaft 25 low-angles, leans on main body 7 one sides to be provided with boss 34 in the swing arm 17, and boss 34 corresponding main bodys 7 are provided with blind hole; Be provided with in the blind hole and push away spring 24, push away spring 24 outer ends and be sleeved on the boss 34, lean on swing arm 17 middle parts of main body 7 one sides to be provided with snap close 35; Be provided with the L shaped through hole K3 of level with snap close 35 corresponding main bodys 7; Snap close 35 inserts from through hole K3 one end, and the other end of through hole K3 is provided with seal plug 20, is provided with control spring 19 and piston pin 18 among the through hole K3 in the seal plug 20 successively; Piston pin 18 1 ends are fitted on the control spring 19, and the other end is inserted in the lockhole on the snap close 35.
As shown in Figure 1, be provided with strain gauge and switch storehouse 4 in the groove C1 on top connection 1 outer wall, strain gauge comprises strain gauge 3 and stress transfer line 5, strain gauge 3 pastes on groove C1 inwall, is provided with switch and data transmission port in the switch storehouse 4; Be provided with temperature pick up, main circuit board 9 and battery 10 in the cavity of main body 7, central tube 6 and lower contact 1, formation between 13; Main circuit board 9, battery 10 are separately fixed on main body 7 lower surfaces through bolt 8; Temperature pick up is connected with main circuit board 9, perhaps includes the integrated temperature sensor on the main circuit board 9; Battery 10 is connected with main circuit board 9 through connecting line; Power supply is provided; Pressure sensor comprises pressure sensor 12 and pressure transmission line 11, and central tube 6 outer lug boss 30 are provided with the vertical core that communicates with main circuit board 9 place cavitys, central tube 6 respectively, are fixed with pressure sensor 12 in the vertical core; The vertical core top is through the seal sealing, and pressure sensor 12 is connected with main circuit board 9 through pressure transmission line 11; Top connection 1 bottom is provided with inclined to one side hole K1; Be provided with groove C3 vertically between central tube 6 and the main body 7; Stress transfer line 5 links to each other with main circuit board 9 through groove C3 through inclined to one side hole K1 and groove C3, hall sensing line 14, and the transmission line in the groove C3 is connected with switch storehouse 4 interior data transmission port main circuit board 9 between the inclined to one side hole K1 of top connection, central tube 6 and the main body 7 through being arranged on.
The concrete course of work: before the present invention went into the well, the switch opens with the switch storehouse screwed on sheath; Go into the well together with the down-hole string that downhole tools such as packer, injection well downhole flow regulator are formed, after the desired depth of arrival down-hole, after oil pipe is sprained and pressed set packer; Through pulling allotment injection well downhole flow regulator, to stratum water filling respectively, in the injecting process; Piston pin 18 under action of hydraulic force, compression control spring 19, piston pin 18 withdraws from the lockhole k4 of swing arm 17; Swing arm release, swing arm 17 are ejected under the effect that pushes away spring 24, and amount wheel 16 outer rims are attached on sleeve pipe 26 inwalls; Along with tubing string moves up and down and rotates, detect the magnetic signal quantity that magnetic post 23 produces through Hall element 22, just can calculate the revolution of output wheel 16 and the displacement data that tubing string takes place; But integrated temperature sensor of the present invention, strain gauge, pressure sensor detector tube column temperature, pressure, stressed delta data, above-mentioned various data transfer record are on main circuit board; The present invention opens sheath 2 after taking out, and plugs transmission line from switch storehouse 4 and is connected with computer, will collect transfer of data to computer, just can analyze the different temperatures of obtaining, active force and the wriggling displacement situation that the pressure lower tubular column receives.
Claims (6)
1. the stressed and displacement detector of down-hole string is characterized in that, this device is tubular structure; Tubular structure comprises the upper and lower joint of main body and two ends, is set with central tube in upper and lower joint and the main body, is provided with switch storehouse, strain gauge, temperature pick up, pressure sensor, main circuit board and battery in the tubular structure tube wall; Wherein pressure sensor is assemblied in the position that is communicated with central tube; In tube wall, switch has switch in the storehouse to all the other each several parts by removable seal, and the transmission line that the sensor and switch pass through separately respectively links to each other with main circuit board; Have groove on the outer wall of tubular structure; Be provided with in the groove to annotate and press release pipeline wriggling displacement detector, its outside does not exceed the outermost edges of device, annotates and presses release pipeline wriggling displacement detector to link to each other with main circuit board through its transmission line; Described notes press release pipeline wriggling displacement detector to be made up of the swing arm of axial setting, the amount wheel mechanism and the Hall element of measurement tubing string displacement; Swing arm one end is rotatably connected on the main body; The amount wheel mechanism is arranged on the swing arm other end; Hall element sealing is arranged on and measures in the tube wall of wheel mechanism correspondence position, be respectively equipped with in the tube wall between the swing arm two ends outside promotion swing arm penetrating mechanism, keep swing arm and be close to the notes of main body and press release mechanism.
2. the stressed and displacement detector of down-hole string according to claim 1 is characterized in that, described amount wheel mechanism comprises the amount wheel shaft that is fixed on the swing arm end, the amount wheel of measuring rotation assembling on the wheel shaft, and amount is taken turns upward and is evenly equipped with magnetic patch at circumferencial direction.
3. the stressed and displacement detector of down-hole string according to claim 1 is characterized in that, described penetrating mechanism comprises and pushes away spring, pushes away spring one end and is arranged on the tube wall, and the other end is fixed in the swing arm.
4. the stressed and displacement detector of down-hole string according to claim 1; It is characterized in that; Described notes press release mechanism to be made up of the control spring and the piston pin that set gradually in the L shaped through hole of the level that is provided with in the snap close of swing arm middle inside setting, the tube wall corresponding with snap close, the through hole; Snap close inserts from through hole one end, and the other end of through hole is provided with seal plug, sets gradually control spring and piston pin in the through hole in the seal plug; Piston pin one end is fitted on the control spring, and the other end is inserted in the lockhole of snap close.
5. according to arbitrary stressed and displacement detector of described down-hole string of claim 1-4, it is characterized in that, the upper and lower end portion of said main body respectively with upper and lower joint fixed seal connection; Be set with central tube in upper and lower joint and the main body; Central tube upper end and top connection fixed seal connection, its bottom is connected with the lower contact slipper seal, in the tube wall of main body or upper and lower joint strain gauge, temperature pick up, pressure sensor, main circuit board and battery is set; Have groove on the top connection outer wall; Be provided with strain gauge and switch storehouse in the groove, the groove external fixation has the sheath with its sealing, and strain gauge pastes on the groove inwall.
6. the stressed and displacement detector of down-hole string according to claim 5; It is characterized in that; Main circuit board and battery are set in the cavity that forms between main body, central tube and the lower contact, and main circuit board, battery are separately fixed on the main body lower surface through bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100542749A CN101294489B (en) | 2007-04-23 | 2007-04-23 | Apparatus for testing applied force and displacement of down-hole tubular pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100542749A CN101294489B (en) | 2007-04-23 | 2007-04-23 | Apparatus for testing applied force and displacement of down-hole tubular pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101294489A CN101294489A (en) | 2008-10-29 |
| CN101294489B true CN101294489B (en) | 2012-05-30 |
Family
ID=40064993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100542749A Active CN101294489B (en) | 2007-04-23 | 2007-04-23 | Apparatus for testing applied force and displacement of down-hole tubular pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101294489B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102041998A (en) * | 2009-10-14 | 2011-05-04 | 西安威尔罗根能源科技有限公司 | Pressure transmission structure |
| CN102268972B (en) * | 2011-08-04 | 2013-07-10 | 荆州市翔龙石油科技有限公司 | Method for preventing setting failure of packer resulted from creeping of pipe string |
| CN103742126B (en) * | 2014-01-27 | 2016-06-15 | 西安威盛电子科技股份有限公司 | A kind of memory-type formation breakdown tubing string detector for displacement measuring |
| CN104110250B (en) * | 2014-07-30 | 2017-05-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Storage type underground tool torque measuring method |
| CN104180853B (en) * | 2014-09-01 | 2016-08-24 | 黑龙江科技大学 | Mine country rock Multi-parameter coupling determinator |
| CN104533390B (en) * | 2014-12-31 | 2017-11-03 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of coiled tubing underground load test instrument |
| CN105952434B (en) * | 2016-04-07 | 2019-04-09 | 中国石油天然气集团公司 | The in-service oil jacket defective tube automatic judging method driven in real time based on well logging big data |
| CN106593412B (en) * | 2017-02-20 | 2023-12-01 | 中国矿业大学(北京) | Dynamic monitoring device and monitoring method for stability of full-angle gas extraction borehole |
| CN107966094A (en) * | 2017-11-17 | 2018-04-27 | 山东大东联石油设备有限公司 | A kind of oil well pump displacement detection device for being placed in underground installation |
| CN109098704B (en) * | 2018-10-26 | 2023-04-07 | 中国石油化工股份有限公司 | Creep test method and device for underground tubular column |
| CN110954282B (en) * | 2019-10-24 | 2021-08-17 | 中石化石油机械股份有限公司研究院 | Packer rubber cylinder sealing performance testing device and method |
| CN113982514B (en) * | 2021-11-23 | 2023-06-06 | 中国地质科学院 | Downhole side wall sensor mounting device and mounting method |
| CN115822558A (en) * | 2022-11-30 | 2023-03-21 | 贵州航天凯山石油仪器有限公司 | Oil well pipe column intelligent monitoring and diagnosing method and device based on multi-parameter fusion |
| CN117605444B (en) * | 2024-01-22 | 2024-04-12 | 西安思坦仪器股份有限公司 | High-temperature intelligent water distributor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039740U (en) * | 1988-10-15 | 1989-06-21 | 辽河石油勘探局科学技术研究院 | Temp. and pressure simultaneously measuring instrument |
| US5540101A (en) * | 1995-05-09 | 1996-07-30 | Roctest Ltd. | Borehole directional dilatometer |
| CN2340896Y (en) * | 1997-06-02 | 1999-09-29 | 泰和电气(襄樊)有限公司 | High accuracy storing style temperature and pressure meter |
| EP1205632A3 (en) * | 2000-11-09 | 2003-03-12 | Halliburton Energy Services, Inc. | Method of locating a cementing plug in a subterranean well |
| CN2611586Y (en) * | 2003-03-26 | 2004-04-14 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Depth checker for downhole pipe string machinery |
| CN201037410Y (en) * | 2007-04-24 | 2008-03-19 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Down-hole pipe column stress and displacement detecting device |
-
2007
- 2007-04-23 CN CN2007100542749A patent/CN101294489B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039740U (en) * | 1988-10-15 | 1989-06-21 | 辽河石油勘探局科学技术研究院 | Temp. and pressure simultaneously measuring instrument |
| US5540101A (en) * | 1995-05-09 | 1996-07-30 | Roctest Ltd. | Borehole directional dilatometer |
| CN2340896Y (en) * | 1997-06-02 | 1999-09-29 | 泰和电气(襄樊)有限公司 | High accuracy storing style temperature and pressure meter |
| EP1205632A3 (en) * | 2000-11-09 | 2003-03-12 | Halliburton Energy Services, Inc. | Method of locating a cementing plug in a subterranean well |
| CN2611586Y (en) * | 2003-03-26 | 2004-04-14 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Depth checker for downhole pipe string machinery |
| CN201037410Y (en) * | 2007-04-24 | 2008-03-19 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Down-hole pipe column stress and displacement detecting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101294489A (en) | 2008-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101294489B (en) | Apparatus for testing applied force and displacement of down-hole tubular pile | |
| CN202745860U (en) | Down-hole pipe string stress monitoring device | |
| CN201037410Y (en) | Down-hole pipe column stress and displacement detecting device | |
| CN203534737U (en) | Temperature sensor-based testing device for hollow inclusion stress gauges | |
| CN203848823U (en) | Combined type underground deep disaster monitoring device | |
| CN104110250B (en) | Storage type underground tool torque measuring method | |
| CN204627582U (en) | Memory-type tubing string axial tension, torsiograph | |
| CN102889958A (en) | Coal bed gas pressure direct measurement device and pressure measurement method thereof | |
| CN201292838Y (en) | Pipe column state detection device | |
| CN202869731U (en) | Device for directly measuring gas pressure in coal seam | |
| CN202031570U (en) | Plugging-type pressure differential flowmeter | |
| CN201730608U (en) | Comprehensive logging instrument for underground layered string inspection | |
| CN201318166Y (en) | Plugging direct reading and pressure testing integrated device | |
| CN109973082A (en) | The device and method for measuring multiple seam gas pressure simultaneously to layer-through drilling based on | |
| CN202348268U (en) | High-precision fracturing electronic pressure gauge | |
| CN206397498U (en) | A kind of downhole drill gas detection logging test device | |
| CN203479436U (en) | Pile body stress test apparatus for static-pressure prestressed high-strength concrete pile | |
| CN105756664A (en) | Coiled tubing horizontal well testing device | |
| CN205577974U (en) | Coiled tubing horizontal well testing arrangement | |
| CN204457739U (en) | A kind of injection well pipe column forces testing device | |
| CN201037417Y (en) | Bridge type delamination measuring and sealing structure | |
| CN200946264Y (en) | Rotary penetration sounding probe | |
| CN87215192U (en) | Device for measuring gas pressure of coal bed by drilling hole | |
| CN201635718U (en) | Stratified flow pressure and flow instrument | |
| CN2555397Y (en) | Testing tube column of eccentric pressure meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |