CN103775052A - Drilling tool wellhead safety protection control device - Google Patents
Drilling tool wellhead safety protection control device Download PDFInfo
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- CN103775052A CN103775052A CN201410052854.4A CN201410052854A CN103775052A CN 103775052 A CN103775052 A CN 103775052A CN 201410052854 A CN201410052854 A CN 201410052854A CN 103775052 A CN103775052 A CN 103775052A
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Abstract
The invention relates to a drilling tool wellhead safety protection control device. The device comprises a control system, electromagnetic valves, a pressure sensor, a drilling machine brake cylinder and hanging load meters, wherein the electromagnetic valves are arranged on the gas circuit of the drilling machine brake cylinder, the electromagnetic valves are in the normally-closed state; the electromagnetic valves and the pressure sensor are connected onto the control system, the hanging load meters are used for collecting the lifting load of a drilling tool, and connected onto the pressure sensor. According to the device, after a semi-closed ram preventer is closed, a traveling block can still be moved, and the operation such as drilling tool switching and the like can still be conducted, so that the working time is saved and the working efficiency is improved; meanwhile, the tensile failure of the drilling tool can be prevented during lifting while the drilling tool works, so that the drilling tool can be protected effectively.
Description
Technical field
The invention belongs to oil well control field, relate in particular to a kind of closing after half envelope ram preventer, the operation such as carry out that drilling tool is switched that can also safety and do not break the robot control system(RCS) of drilling tool.
Background technology
In oil well control field, all be provided with half envelope ram preventer and safety device at well head, gas circuit has disconnected the reset of controlling the high low-speed clutch of winch by the by-pass valve control of safety device, stop pressure regulator valve air inlet, high low-speed clutch can not be hung and close, can not carry hook block, prevent that drilling tool from putting forward the object being hung up to partly sealing flashboard thereby reached.
Notice of authorization number is CN202788794U, notice of authorization day is that the Chinese utility model patent on March 13rd, 2013 discloses a kind of preventer and rig interlock safety device (as depicted in figs. 1 and 2), comprise work gas circuit and control gas circuit, work gas circuit by rig driller station gas source 6, often open air feeding apparatus 5, pipeline 7 forms, source of the gas mouth I, working hole K, pipeline 7 air feed of described rig driller station gas source 6 by often opening air feeding apparatus 5 are in the control system of controlling the work of well head rig; Control gas circuit is controlled normally closed air feeding apparatus 4 pipelines 7 of source of the gas 3 by hydraulic control oil cylinder 1 stroke valve 2 and is formed, hydraulic control oil cylinder 1 is relative with stroke valve 2 fixing, it is characterized in that: the oilhole in described hydraulic control oil cylinder 1 rodless cavity is accessed and connected on the pipeline of ram block oil cylinder rodless cavity oilhole by pipeline 7; Described control source of the gas 3 is connected with the pore P of stroke valve 2, the source of the gas mouth I' of normally closed air feeding apparatus 4 by pipeline 7 respectively; The pore A of described stroke valve 2 communicates with atmosphere D, and pore B is connected with the control mouth K' of normally closed air feeding apparatus 4 by pipeline 7; The working hole G' of described normally closed air feeding apparatus 4 is connected and communicates with the control mouth K that often opens air feeding apparatus 5.Under this state, all maloperation void in whole of operating personnel, have avoided that drilling tool is pulled off, derrick is drawn the accident collapsing to occur, and have realized the object of self locking safety protection.
But at present, closing in half envelope ram preventer time, stopping operation is completely very large time waste, after closing well, operation is very important to carry out that drilling tool is switched etc., switching drilling tool just needs the traveling system work of rig, and above-mentioned utility model patent is to forbid traveling system motion, and both oppose.Some drilling team is in order not waste the working time, with regard to artificial cancellation safety device.There is great potential safety hazard in such processing mode, carries drilling tool in the situation that not driving a well, and do not find in time that suspending weight is abnormal and process, and will put off the accident of drilling tool.
In sum, prior art is closed half envelope ram preventer, starts safety device and has just forbidden the motion of traveling system, can not carry out that drilling tool is switched and wait operation, has wasted the working time, if cancellation safety device has brought again huge potential safety hazard.
Summary of the invention
After half envelope ram preventer, can not arrange drilling tool the operation such as to switch in order to overcome above-mentioned existing safety device closing; waste the defect of working time; the present invention is directed to above-mentioned defect, drilling tool well head security protection and control device is provided, closing after half envelope ram preventer; still can movable tourist bus; the operation such as carry out that drilling tool is switched, does not waste the working time, has improved operating efficiency; in work, can also prevent that drilling tool is pulled off in the time promoting, and has effectively protected drilling tool.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Drilling tool well head security protection and control device; it is characterized in that: comprise control system, electromagnetic valve, pressure sensor, borer brake cylinder and suspending weight table; electromagnetic valve is arranged in the gas circuit of borer brake cylinder; electromagnetic valve is in normal off status; electromagnetic valve is connected in control system; pressure sensor is connected in control system, and suspending weight table gathers the lifting load of drilling tool, and suspending weight table is connected on pressure sensor.
In the gas circuit of borer brake cylinder, be also provided with pilot operated valve device, often close air-control device and Chang Kai air-control device, the normal air-control device that closes is connected in the gas circuit between pilot operated valve device and electromagnetic valve, pilot operated valve device and the normal air-control device that closes are connected in electromagnetic valve gas circuit before, the normal air-control device that closes has pressure to close, disconnection with no pressure, the normal air-control device that closes is connected in control system, often opening air-control device is connected in electromagnetic valve gas circuit afterwards, often open that air-control device is with no pressure closes, break out, often open air-control device and be connected in control system, control system is connected with phonetic alarm device.
In the gas circuit of borer brake cylinder, be also provided with exhaust plant, exhaust plant is between borer brake cylinder and electromagnetic valve, exhaust plant comprises push buttonvalve and threeway, before push buttonvalve is positioned at threeway, threeway one end is connected with push buttonvalve, one end is communicated with borer brake cylinder, and the other end is connected with colliding crown block brake cylinder, and push buttonvalve is a three-way valve.
Described electromagnetic valve is two-bit triplet electromagnetic valve.
The described air-control device of often opening is for often opening explosion-proof air control switch, and described normal pass air-control device is the quick-fried air control switch of Chang Guanfang.
Described control system is the full self energy control system of PLC.
Described pressure sensor is explosion-proof fluid sensor.
In control system, be provided with multiple critical lifting loads, the maximum lift load that the drilling tool of the corresponding a kind of specification of each critical lifting load can bear.
It can be also multiple that described electromagnetic valve can be one, while adopting multiple electromagnetic valve, electromagnetic valve is connected in parallel in the gas circuit of borer brake cylinder.
Principle of the present invention is as follows:
An electromagnetic valve is set in the gas circuit of borer brake cylinder, and electromagnetic valve is in normal off status, and electromagnetic valve is connected in control system; Gather the lifting load signal of drilling tool with suspending weight table, the lifting load signal collecting sends control system to after pressure sensor changes into the signal of telecommunication, in control system, be set with critical lifting load, control system compares the critical lifting load of the lifting load signal receiving and setting, in the time that lifting load is more than or equal to critical lifting load, control electromagnetic valve is opened, gas circuit conducting, Compressed Gas enters borer brake cylinder and colliding crown block brake cylinder, stops rig and colliding crown block.
The present invention has the following advantages:
1, the present invention arranges an electromagnetic valve in the gas circuit of borer brake cylinder, and electromagnetic valve is in normal off status, and electromagnetic valve is connected in control system; Gather the lifting load signal of drilling tool with suspending weight table, the lifting load signal collecting sends control system to after pressure sensor changes into the signal of telecommunication, in control system, be set with critical lifting load, control system compares the critical lifting load of the lifting load signal receiving and setting, in the time that lifting load is more than or equal to critical lifting load, control electromagnetic valve is opened, gas circuit conducting, Compressed Gas enters borer brake cylinder and colliding crown block brake cylinder, stops rig and colliding crown block.Electromagnetic valve is in off position time, stop Compressed Gas to enter brake cylinder, closing after half envelope ram preventer, Compressed Gas cannot enter brake cylinder, do not carry out brake, now can continue the operations such as lifting or decline drilling tool carry out that drilling tool is switched, when the critical lifting only arranging in the lifting load of drilling tool exceedes control system is loaded, control system is just controlled electromagnetic valve and is opened, Compressed Gas could enter smoothly as borer brake cylinder and colliding crown block brake cylinder, stops rig and colliding crown block.Can also proceed drilling tool and the operation such as switch closing after half envelope ram preventer workman like this, take full advantage of the working time, improve operating efficiency; In the time switching the operations such as drilling tool, once the lifting of drilling tool load exceedes the critical lifting load of setting, will self-actuating brake, drilling tool can not move, and prevents that drilling tool is pulled off, and has well protected drilling tool; By setting of the present invention, in having improved operating efficiency, can also guarantee that drilling tool is not pulled off, eliminate and drawn drilling tool and break the potential safety hazard of bringing.
2, control system of the present invention is connected with normal pass air-control device, often opens air-control device and phonetic alarm device, the normal air-control device that closes has pressure to close, disconnection with no pressure, often open that air-control device is with no pressure closes, break out, the lifting load receiving when control system is more than or equal to critical lifting load, and often closes air-control device and Chang Kai air-control device is all closed, and control system control warning device is reported to the police.Phonetic alarm device, often close the synergy of air-control device and Chang Kai air-control device, phonetic alarm device is reported to the police and can be damaged by good alert electromagnetic valve, need to change electromagnetic valve, also remind operating personnel to promote load and exceeded critical lifting load simultaneously, can not continue operation, well prevent the drop-down drillling tool twisting off of situation that electromagnetic valve damages again, effectively guaranteed that drilling tool can not be pulled off.
3, the present invention is also provided with exhaust plant in the gas circuit of borer brake cylinder, exhaust plant is between borer brake cylinder and electromagnetic valve, exhaust plant comprises push buttonvalve and threeway, before push buttonvalve is positioned at threeway, threeway one end is connected with push buttonvalve, one end is communicated with brake cylinder, and the other end is communicated with colliding crown block, and push buttonvalve is a three-way valve.Exhaust plant is the device of discharging gases at high pressure in order to rerun rig and colliding crown block, if there is no exhaust plant, in the time that needs reopen rig and colliding crown block, because the effect of Compressed Gas cannot start, and exhauster structure provided by the invention is simple, easy operating.
4, electromagnetic valve of the present invention is two-bit triplet electromagnetic valve, two refer to and close and open two positions, threeway refers to all three blow vents, which position such electromagnetic valve can accurately control electromagnetic valve in by the control of control system, whether control gas circuit conducting, whether brake thereby control, control sensitive and accurate.
5, control system of the present invention is the full self energy control system of PLC, and the full self energy control system of PLC is easy to control able to programme, and multiple critical lifting loads can be set, and is convenient to workman's practical operation.
6, in control system of the present invention, be provided with multiple critical lifting loads; the maximum lift load that the drilling tool of the corresponding a kind of specification of each critical lifting load can bear; in same control system, can realize like this protection of many specifications drilling tool, prevent that drilling tool is pulled off, operation is simple.
Accompanying drawing explanation
Fig. 1 and Fig. 2 are prior art structural representation;
Fig. 3 is schematic diagram of the present invention.
Reference numeral 1, hydraulic control oil cylinder in figure, 2, stroke valve, 3, control source of the gas, 4, normally closed air feeding apparatus, 5, often open air feeding apparatus, 6, gas source, 7, pipeline, 8, pilot operated valve device, 9, electromagnetic valve, 10, borer brake cylinder, 11, colliding crown block brake cylinder, 12, threeway, 13, push buttonvalve, 14, often open air-control device, 15, control system, 16, suspending weight table, 17, pressure sensor, 18, often close air-control device, 19, gas circuit, 20, phonetic alarm device.
The specific embodiment
For improving production timeliness, the in the situation that of closing well, still can carry out drilling tool at well head and switch or combine.For this situation; the invention provides a kind of drilling tool well head security protection and control device; closing after half envelope ram preventer; still can movable tourist bus; only have in the time that the lifting load of drilling tool exceedes or equal the critical lifting load of setting, could brake, can not only protect drilling tool; and can normally implement shaft mouth operation, improve operating efficiency.
This invention has related to lower device:
Pilot operated valve device 8, often close air-control device 18, electromagnetic valve 9, control system 15, pressure sensor 17, often open air-control device 14, phonetic alarm device 20, push buttonvalve 13, borer brake cylinder 10, colliding crown block brake cylinder 11, suspending weight table 16 and two threeways 12 and a phonetic alarm device 20.
As shown in Figure 3, their connection and position relationship are as follows:
In the gas circuit 19 of borer brake cylinder, be disposed with pilot operated valve device 8, often close air-control device 18, electromagnetic valve 9, often open air-control device 14, push buttonvalve 13 and a threeway 12, the air inlet port of this threeway 12 is communicated with push buttonvalve 13, two other exhaust opening, one is connected with colliding crown block brake cylinder 11, and one is connected with borer brake cylinder 10; Push buttonvalve 13 is a three-way valve, and two opennings are connected in the gas circuit 19 of borer brake cylinder 10, and another one openning is used for exhaust, the valve 13 that only needs to push the button, and Compressed Gas just can be discharged from push buttonvalve; Electromagnetic valve 9 is connected in control system 15, often open air-control device 14, often close air-control device 18 and pressure sensor 17 and be all connected in control system 15, suspending weight table 16 gathers drilling tool lifting load by a threeway 12, the lifting load gathering represents by fuel injection pressure signal, promote load in linear relation with fuel injection pressure signal, the fuel injection pressure signal that pressure sensor 17 receives can represent the lifting load of the drilling tool that suspending weight table records; Pressure sensor 17 changes into the signal of telecommunication by the fuel injection pressure signal collecting and sends control system 15 to, and phonetic alarm device 20 is connected in control system 15.
Wherein often close the quick-fried air control switch of air-control device 18 preferred Chang Guanfang, often open air-control device 14 and preferably often open explosion-proof air control switch, the preferred explosion-proof fluid sensor of pressure sensor 17, control system 15 is preferably the full intelligence control system of PLC.
Operating principle of the present invention and the course of work are described below:
After partly sealing ram preventer and closing, enter two-bit triplet electromagnetic valve (in normal off status) from gas circuit through pilot operated valve device from the Compressed Gas that partly seals flashboard, Compressed Gas in gas circuit is isolated herein, cannot move on, now the brake cylinder of drilling tool and the brake cylinder of colliding crown block all do not have Compressed Gas to enter, rig and colliding crown block do not brake, can work on, now operating personnel just can the operation such as continue to be engaged in that drilling tool is switched closing after half envelope ram preventer, take full advantage of the working time, Compressed Gas is now stopped in two-bit triplet electromagnetic valve and the normal air-control device place of closing, because normal pass air-control device is to press off to close, disconnection with no pressure, it sends closure signal to PLC full intelligence control system, it is now that half envelope ram preventer is closed that PLC control system can demonstrate, but can continue the state of operation, operating personnel this state can safety operation, when the oil pressure of coming from suspending weight table converts the signal of telecommunication to by sensor, enter the full intelligence control system of PLC, the full intelligence control system of PLC compares the lifting load receiving and the critical lifting load of setting, if the lifting receiving load is less than critical lifting load, PLC is complete, and intelligence control system is not done and is reacted, no signal output, electromagnetic valve is disconnected, and now just can carry out drilling tool and switch or combine operation, the lifting load of the drilling tool receiving when the full intelligence control system of PLC reaches or exceedes the critical lifting load that the full intelligence control system of PLC is set, the full intelligence control system signal output of PLC, two-bit triplet electromagnetic valve is connected, Compressed Gas enters borer brake cylinder, thereby make winch height throw-out-of clutch, and make to coil braking, borer brake, Compressed Gas enters colliding crown block brake cylinder, colliding crown block brake, Compressed Gas enters often opens air-control device, owing to often opening, air-control device is with no pressure closes, break out, if now two-bit triplet electromagnetic valve is normally opened, often opening air-control device disconnects, the normal air-control device that closes is closed, now the full intelligence control system of PLC is not controlled warning device warning, if two-bit triplet electromagnetic valve is undesired, normally do not open, often opening air-control device does not have Compressed Gas to enter, without pressure, often opening air-control device closes, the normal air-control device that closes is closed, the full intelligence control system of PLC receives often to be opened air-control device and closes, after the signal that normal pass air-control device is closed, control voice and embrace alarm device warning, alert stops operation, stop rig and colliding crown block, also illustrated that two-bit triplet electromagnetic valve normally do not open simultaneously, check two-bit triplet electromagnetic valve, for maintenance personal provides repair message accurately, shorten maintenance time.After rig and colliding crown block brake, if need to open import, rework, only need to press and can discharge gases at high pressure, brake off, resumes work.
The setting of critical lifting load:
The maximum suspending weight value that can set drilling tool in the full intelligence control system of PLC is critical lifting load, simple, convenient.
The fuel injection pressure signal of sensor is taken from suspending weight table place, and the size of this oil pressure and the suspending weight relation that is in line, therefore can demarcate according to the numerical value on suspending weight table, the numerical value on sensor panel table is transferred to consistent with the numerical value of suspending weight table.This demarcation can be adjusted setting voluntarily by operating personnel completely, simple to operation.
The present invention has not only realized the object that prevents from breaking drilling tool after flashboard cuts out partly sealing, after also having realized and partly sealing flashboard and close, and the operation that drilling tool still can be switched or combine.Greatly improved production timeliness, and controllability is high, has reduced potential safety hazard, simple to operation.
Embodiment 1
In this enforcement, in the gas circuit 19 of borer brake cylinder, be disposed with pilot operated valve device 8, often close air-control device 18, electromagnetic valve 9, often open air-control device 14, push buttonvalve 13 and a threeway 12, the air inlet port of this threeway 12 is communicated with push buttonvalve 13, two other exhaust opening, one is connected with colliding crown block brake cylinder 11, and one is connected with borer brake cylinder 10; Push buttonvalve 13 is a three-way valve, and two opennings are connected in the gas circuit 19 of borer brake cylinder 10, and another one openning is used for exhaust, the valve 13 that only needs to push the button, and Compressed Gas just can be discharged from push buttonvalve; Electromagnetic valve 9 is connected in control system 15, often open air-control device 14, often close air-control device 18 and pressure sensor 17 and be all connected in control system 15, suspending weight table 16 gathers drilling tool lifting load by a threeway 12, the lifting load gathering represents by fuel injection pressure signal, promote load in linear relation with fuel injection pressure signal, the fuel injection pressure signal that pressure sensor 17 receives can represent the lifting load of the drilling tool that suspending weight table records; Pressure sensor 17 changes into the signal of telecommunication by the fuel injection pressure signal collecting and sends control system 15 to.
Wherein often close the quick-fried air control switch of air-control device 18 preferred Chang Guanfang, often open air-control device 14 and preferably often open explosion-proof air control switch, the preferred explosion-proof fluid sensor of pressure sensor 17, control system 15 is preferably the full intelligence control system of PLC.
In the present embodiment, be with the difference of embodiment 1, electromagnetic valve 9 has two, be connected in parallel in the gas circuit 19 of borer brake cylinder, its objective is that when an electromagnetic valve 9 damages therein, another electromagnetic valve is normally worked, do not affect the normal work of system, be convenient to workman yet and change electromagnetic valve.
In the present embodiment, be with the difference of embodiment 1, electromagnetic valve 9 has three, is connected in parallel in the gas circuit 19 of borer brake cylinder.
Electromagnetic valve 9 can be multiple, is not limited to one to three, as long as be connected in parallel in the gas circuit 19 of borer brake cylinder.
Claims (7)
1. drilling tool well head security protection and control device; it is characterized in that: comprise control system (15), electromagnetic valve (9), pressure sensor (17), borer brake cylinder (10) and suspending weight table (16); electromagnetic valve (9) is arranged in the gas circuit (19) of borer brake cylinder (10); electromagnetic valve (9) is in normal off status; electromagnetic valve (9) is connected in control system; pressure sensor (17) is connected in control system (15); suspending weight table (9) gathers the lifting load of drilling tool, and suspending weight table (9) is connected on pressure sensor (17).
2. drilling tool well head security protection and control device according to claim 1, it is characterized in that: in the gas circuit (19) of borer brake cylinder (10), be also provided with pilot operated valve device (8), often close air-control device (18) and often open air-control device (14), the normal air-control device (18) that closes is connected in the gas circuit (19) between pilot operated valve device (8) and electromagnetic valve (9), pilot operated valve device (8) and the normal air-control device (18) that closes are connected in electromagnetic valve (9) gas circuit (19) before, the normal air-control device (18) that closes has pressure to close, disconnection with no pressure, the normal air-control device (18) that closes is connected in control system (15), often opening air-control device (14) is connected in electromagnetic valve (9) gas circuit (19) afterwards, often open with no pressure the closing of air-control device (14), break out, often opening air-control device (14) is connected in control system (15), control system (15) is connected with phonetic alarm device (20).
3. drilling tool well head security protection and control device according to claim 1 and 2, it is characterized in that: in the gas circuit (19) of borer brake cylinder (10), be also provided with exhaust plant, exhaust plant is positioned between borer brake cylinder (10) and electromagnetic valve (9), exhaust plant comprises push buttonvalve (13) and threeway (12), push buttonvalve (13) is positioned at threeway (12) before, threeway (12) one end is connected with push buttonvalve (13), one end is communicated with borer brake cylinder (10), the other end is connected with colliding crown block brake cylinder (11), push buttonvalve (13) is a three-way valve.
4. drilling tool well head security protection and control device according to claim 1 and 2, is characterized in that: described electromagnetic valve (9) is two-bit triplet electromagnetic valve.
5. drilling tool well head security protection and control device according to claim 2, is characterized in that: the described air-control device (14) of often opening is for often opening explosion-proof air control switch, and described normal pass air-control device (18) is the quick-fried air control switch of Chang Guanfang.
6. drilling tool well head security protection and control device according to claim 1, is characterized in that: described control system (15) is the full self energy control system of PLC.
7. drilling tool well head security protection and control device according to claim 1, is characterized in that: described pressure sensor (17) is explosion-proof fluid sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410052854.4A CN103775052B (en) | 2014-02-17 | 2014-02-17 | Drilling tool wellhead safety protection control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410052854.4A CN103775052B (en) | 2014-02-17 | 2014-02-17 | Drilling tool wellhead safety protection control device |
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| CN103775052A true CN103775052A (en) | 2014-05-07 |
| CN103775052B CN103775052B (en) | 2017-01-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952618A (en) * | 2018-08-16 | 2018-12-07 | 濮阳市百福瑞德石油科技有限公司 | A kind of drilling well is anti-to put off device |
| CN112901136A (en) * | 2021-01-29 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Drilling machine brake and comprehensive protection moving system |
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| SU1640349A1 (en) * | 1989-01-12 | 1991-04-07 | Предприятие П/Я Р-6109 | Round trip apparatus for drilling rig |
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| CN202788794U (en) * | 2012-09-25 | 2013-03-13 | 盐城佰信石油机械有限公司 | Blowout preventer and drilling machine linkage safety device |
| CN203939494U (en) * | 2014-02-17 | 2014-11-12 | 成都市卓新实业有限公司 | Drilling tool well head security protection and control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA1195921A (en) * | 1983-02-09 | 1985-10-29 | Robert J. Prior | Blow out preventer warning system |
| SU1640349A1 (en) * | 1989-01-12 | 1991-04-07 | Предприятие П/Я Р-6109 | Round trip apparatus for drilling rig |
| CN2364016Y (en) * | 1999-04-08 | 2000-02-16 | 成都菲达实业有限责任公司 | Computer controller for preventing crown block from collision |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952618A (en) * | 2018-08-16 | 2018-12-07 | 濮阳市百福瑞德石油科技有限公司 | A kind of drilling well is anti-to put off device |
| CN112901136A (en) * | 2021-01-29 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Drilling machine brake and comprehensive protection moving system |
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| Publication number | Publication date |
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| CN103775052B (en) | 2017-01-25 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Lunjun Inventor after: Luo Qiongying Inventor after: Xu Jiaxiong Inventor after: Chi Zhenhua Inventor after: Zhang Li Inventor before: Chen Lunjun Inventor before: Luo Qiongying Inventor before: Xu Jiaxiong Inventor before: Chi Zhenhua Inventor before: Zhang Li |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |