CN204344067U - A kind of vertical double hose submerged production tree device - Google Patents
A kind of vertical double hose submerged production tree device Download PDFInfo
- Publication number
- CN204344067U CN204344067U CN201420811169.0U CN201420811169U CN204344067U CN 204344067 U CN204344067 U CN 204344067U CN 201420811169 U CN201420811169 U CN 201420811169U CN 204344067 U CN204344067 U CN 204344067U
- Authority
- CN
- China
- Prior art keywords
- valve
- production
- valve body
- tree device
- production tree
- 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
Landscapes
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The utility model discloses a kind of vertical double hose submerged production tree device, production tree device comprises: production tree device cap; The framework be connected with bottom production tree device cap; Be arranged on the production tree device control panel on framework; The leading truck be connected with base of frame; Be arranged on the underwater control assembly of one end of framework; Guide peg and combination valve assembly.Guide peg is arranged on framework surrounding, and each guide peg top, middle part are connected with framework, are connected bottom this guide peg with leading truck; Each guide peg inside is cavity.A part for combination valve assembly is arranged in framework.Production passage and annulus access integrate by the utility model, compact conformation, take up room little, are convenient to installation and maintenance; Main valve and flutter valve integrated form are arranged on combination valve, avoid between single valve and connected by pipeline, reduce the risk producing and leak, good airproof performance.
Description
Technical field
The utility model relates to submerged production device, is specifically related to a kind of vertical double hose submerged production tree device.
Background technology
Submerged production tree device is mainly used in the flow and the pressure that control well head when Oil/gas Well is produced, and develop requisite visual plant as realizing offshore oil and gas field, its duty directly determines the running status of whole subsea production system.In recent years, the use amount of submerged production tree device significantly increases year by year, the subsea production tree type of device used under different waters, different oil fields block and oil-recovery operations operating mode is different, according to the installation site producing main valve, submerged production tree device is divided into vertical and horizontal two kinds.Produce main valve is vertical production tree device on vertical latus rectum, and producing that main valve produces in level, runner is horizontal Christmas tree device.
The installation of vertical production tree device and operation are all relatively more flexible, and before installation production tree device, first can install oil pipe, and tubing hanger is directly installed in well head or oil pipe, and production tree device is arranged on well head top.
Vertical subsea tree device of the prior art, complex structure, volume is comparatively large, installing/dismounting inconvenience, and sealing is not enough.
Summary of the invention
The purpose of this utility model is to provide a kind of vertical double hose submerged production tree device, and by arranging guide peg on leading truck, guide peg inside is cavity, and can coordinate with the guide peg of underwater well head, achieve a butt joint installation.Also be provided with combination valve assembly, underwater control assembly simultaneously, this submerged production tree device can be made to obtain Long-distance Control, or adopt unmanned remotely controlled submersible vehicle under water to control, be effective to the operating environment of underwater complex.
In order to achieve the above object, the utility model is achieved through the following technical solutions:
A kind of vertical double hose submerged production tree device, be characterized in, this production tree device comprises:
Production tree device cap;
Framework, is connected with bottom described production tree device cap;
Production tree device control panel, is arranged on said frame;
Leading truck, is connected with described base of frame;
Underwater control assembly, is arranged on one end of described framework;
Four guide pegs are separately positioned on described framework surrounding, and each described guide peg top, middle part are connected with described framework, are connected bottom this guide peg with described leading truck.
Combination valve assembly, a part for described combination valve assembly is arranged in described framework.
Preferably, described combination valve assembly comprises:
First valve component, is fixedly installed in described framework;
Second valve component, described second valve component one end is connected with described first valve component;
3rd valve component, is connected with the other end of described second valve component.
Preferably, described first valve component comprises:
First valve body, is fixedly installed in described framework;
Described first valve body is provided with the production passage, the annulus access that run through its inside, and the described top and bottom of production passage, the top and bottom of annulus access communicate with external equipment respectively;
Produce main valve, be arranged on described first valve body middle and lower part, and be connected with described production passage;
Annulus master valve, is arranged on described first valve body middle and lower part, and is connected with described annulus access;
Production pumping valve, is arranged on described first valve body middle and upper part, and is connected with described production passage;
Annular space pumping valve, is arranged on described first valve body middle and upper part, and is connected with described annulus access;
Described first valve inner is also provided with produces wing passage, annular space wing passage; Described production wing passage is connected with described production passage, and described annular space wing passage is connected with described annulus access;
Cross-over connection valve, is arranged on described first valve body, and is connected with described production passage;
U-tube, be arranged in the middle part of described first valve body, described U-tube one end is connected with described cross-over connection valve.
Preferably, described first valve body also comprises: annulus wing valve, is arranged on the first valve body, and is connected with described annular space wing passage; This annulus wing valve is connected with the described U-tube other end.
Preferably, described first valve body also comprises: multiple test suite, multiple control valve line interface; Multiple described test suite is separately positioned on described first valve body (711) top; Multiple described control valve line interface is separately positioned on described first body base.
Preferably, described second valve component comprises:
Second valve body, described second valve body one end is connected with described first valve body;
Described second valve body is provided with the production wing passage running through its inside, is connected with the production wing passage of described first valve inner;
Produce flutter valve, be arranged on described second valve body, and be connected with described production wing passage;
Injection valve, is arranged on described second valve body, and is connected with described production wing passage.
Preferably, described 3rd valve component comprises:
Reversal valve, described reversal valve one end is connected with the described second valve body other end;
U-tube, described U-tube one openend is connected with the described reversal valve other end;
Choke valve, is connected with another openend of described U-tube;
Crossover tee valve, described crossover tee valve one end is connected with described choke valve;
Flap valve, described flap valve one end is connected with the other end of described crossover tee valve;
Bend pipe, one end of described bend pipe is connected with the described flap valve other end;
Connector, is connected with the other end of described bend pipe.
Preferably, underwater control assembly comprises:
Mounting baseplate, is arranged on one end of described framework;
Subsea control modules, is arranged on described mounting baseplate;
Accumulator, is arranged on described mounting baseplate, and is connected with described subsea control modules;
Balancing weight, is arranged on bottom described mounting baseplate.
Preferably, described production tree device also comprises some blocks of cathodic protection metals, and described some blocks of cathodic protection metals are arranged between described mounting baseplate and described leading truck.
Preferably, described production tree device also comprises:
Oil gas monitoring sensor, is arranged on described crossover tee valve;
Production monitoring sensor, is arranged on described control valve line interface, with described production channel connection;
Annular space monitoring sensor, is arranged on described control valve line interface, is communicated with described annulus access.
The utility model compared with prior art has the following advantages:
The one that the utility model provides vertical double hose submerged production tree device, production passage and annulus access are integrated, compact conformation, volume is little, takes up room little, is convenient to installation and maintenance; Main valve and flutter valve integrated form are arranged on combination valve, avoid between single valve and connected by pipeline, reduce the risk producing and leak, good airproof performance; Can adopt Long-distance Control or under water unmanned remotely controlled submersible vehicle control this production tree device, effectively can serve the operating environment of underwater complex.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of vertical double hose submerged production tree device of the utility model.
Fig. 2 is the combination valve assembly front view of a kind of vertical double hose submerged production tree device of the utility model.
Fig. 3 is the combination valve assembly plan view of a kind of vertical double hose submerged production tree device of the utility model.
Fig. 4 is the combination valve components side view of a kind of vertical double hose submerged production tree device of the utility model.
Fig. 5 is the combination valve assembly partial sectional view of a kind of vertical double hose submerged production tree device of the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the utility model is further elaborated.
As shown in Figure 1; a kind of vertical double hose submerged production tree device, this production tree device comprises: production tree device cap 1, framework 2, production tree device control panel 3, leading truck 4, underwater control assembly 5, four guide pegs 6, combination valve assembly 7 and cathodic protection metals 8.
Wherein, framework 2 is connected with bottom production tree device cap 1.Production tree device control panel 3 is arranged on the frame 2.Leading truck 4 is connected with bottom framework 2.Underwater control assembly 5 is arranged on one end of framework 2; Four guide pegs 6 are separately positioned on framework 2 surrounding, and each guide peg 6 top, middle part are connected with framework 2, are connected bottom this guide peg 6 with leading truck 4; Each guide peg 6 inside is cavity.A part for combination valve assembly 7 is arranged in framework 2, and another part of this combination valve assembly 7 is fixedly connected with framework 2.Cathodic protection metal 8 is arranged between framework 2 and leading truck 4.
In the present embodiment, four guide peg 6 inside, all in cavity, can be guided by guide rope and be inserted on the guide peg of underwater well head pedestal, realize locating with mating of underwater well head.Adopt lead as cathodic protection metal 8, thus can avoid or weaken the situation of this production tree apparatus structure generation corrosion under the seawater or other operating modes of real work.Production tree device control panel 3 is concentrated the control element of each valve in combination valve assembly 7, to be convenient to manually or unmanned remotely controlled submersible vehicle (Remote Operated Vehicle, be called for short ROV) controls this production tree device under water.
As shown in Figure 2 and Figure 3, combination valve assembly 7 comprises: the first valve component 71, second valve component 72 and the 3rd valve component 73.
Wherein, the first valve component 71 is fixedly installed in framework 2; Second valve component 72 one end is connected with the first valve component 71; 3rd valve component 73 one end is connected with the other end of the second valve component 72, and the 3rd valve component 73 other end is fixedly connected with framework 2.
In the present embodiment, the 3rd valve component 73 is arranged on on underwater control assembly 5 relative position.
As shown in Fig. 2, Fig. 3, Fig. 5, the first valve component 71 comprises: the first valve body 711, production main valve 712, Annulus master valve 714, production pumping valve 713, annular space pumping valve 715, annulus wing valve 716, U-tube 717 and cross-over connection valve 718.
Wherein, the first valve body 711 is fixedly installed in framework 2.Valve body 711 is provided with the production passage 7111, the annulus access 7112 that vertically run through its inside, and production passage 7111, annulus access 7112 top are arranged on this valve body 711 inner top, and communicate with external equipment respectively.Communicate with external equipment respectively bottom this production passage 7111, annulus access 7112.First valve body 711 inside is also provided with and produces wing passage 7113, annular space wing passage 7114; Produce wing passage 7113 to be connected with production passage 7111, annular space wing passage 7114 is connected with annulus access 7112.
Produce main valve 712 and be arranged on valve body 711 middle and lower part, and be connected with production passage 7111; Annulus master valve 714 is arranged on valve body 711 middle and lower part, and is connected with annulus access 7112; Production pumping valve 713 is arranged on valve body 711 middle and upper part, and is connected with production passage 7111; Annular space pumping valve 715 is arranged on valve body 711 middle and upper part, and is connected with annulus access 7112; Annulus wing valve 716, is arranged in the middle part of valve body 711, and is connected with annular space wing passage 7114; Cross-over connection valve 718 is arranged on the first valve body 711 middle and upper part, and is connected with production passage 7111; U-tube 717 is arranged in the middle part of the first valve body 711, and is connected with annulus wing valve 716, cross-over connection valve 718.
First valve body 71 also comprises: multiple test suite 7191, multiple control valve line interface 7192; Multiple test suite 7191 is separately positioned on described first valve body top; Multiple control valve line interface 7192 is separately positioned on bottom the first valve body 711.
As shown in Fig. 2, Fig. 3, Fig. 5, the second valve component 72 comprises: the second valve body 721, production flutter valve 722 and injection valve 723.
Second valve body 721 is provided with the production wing passage 7211 running through its inside, is connected with the production wing passage 7113 of the first valve body 711 inside.
Second valve body 721 one end is connected with the first valve body 711.Produce flutter valve 722 to be arranged on the second valve body 721, and be connected with production wing passage 7211.Injection valve 723 is arranged on the second valve body 721, and is connected with production wing passage 7211.
As shown in Figure 2, Figure 4 shows, the 3rd valve component 73 comprises: reversal valve 731, U-tube 732, choke valve 733, crossover tee valve 734, flap valve 735, bend pipe 736 and connector 737.
Reversal valve 731 one end is connected with second valve body 721 other end; One end of U-tube 732 is connected with reversal valve 731 other end; Choke valve 733 is connected with the other end of U-tube 732; Crossover tee valve 734 one end is connected with choke valve 733; Flap valve 735 one end is connected with the other end of crossover tee valve 734; One end of bend pipe 736 is connected with flap valve 735 other end; Connector 737 is connected with the other end of bend pipe 736.
As shown in Figure 2, Figure 4 shows, production tree device also comprises: be arranged on the oil gas monitoring sensor 11 on crossover tee valve 734, the production monitoring sensor 12 be arranged on control valve line interface 7192, the annular space monitoring sensor 13 be arranged on control valve line interface 7192.
As shown in Figure 1, underwater control assembly 5 comprises: mounting baseplate 51, subsea control modules 52, accumulator 53 and balancing weight 54.
Wherein, mounting baseplate 51 is arranged on one end of framework 2; Subsea control modules 52 is arranged on mounting baseplate 51; Accumulator 53 is arranged on mounting baseplate 51, and is connected with subsea control modules 52; Balancing weight 54 is arranged on bottom mounting baseplate 51.
In the present embodiment, accumulator 53 is for providing direct driving force for subsea control modules 52, and balancing weight 54 is for balancing the distribution of weight of whole production tree device.Subsea control modules 52 is connected with each valve control actuator part of combination valve assembly 7, can control the closed situation of each valve according to real work situation.Subsea control modules 52 is also connected with oil gas monitoring sensor 11, production monitoring sensor 12 and annular space monitoring sensor 13, can be used for the actual conditions of monitoring the work of production tree device.
The one that the utility model provides vertical double hose submerged production tree device, specific works principle is as follows:
In normal work, production pumping valve 713 cuts out, and is blocked production passage 7111 upper end, and the oil pipe that production passage 7111 is connected with its lower end is communicated with; The oil gas of down-hole flows into through oil pipe to be produced in passage 7111, producing wing passage 7113 is oil gas delivery outlet, after the outflow of oil gas is through and produces passage 7111, production main valve 712, production flutter valve 722, the 3rd valve component 73 is flowed out to from the second valve body 721, then through reversal valve 731, U-tube 732, choke valve 733, crossover tee valve 734, flap valve 735, bend pipe 736 and connector 737, finally oil gas pipeline is entered.Choke valve 733 wherein in the 3rd valve component 73 is for the flow of regulable control produce hydrocarbons and pressure, thus the output flow of production control oil gas.The connector 737 of the 3rd valve component 73 is for connecting outside oil gas pipeline.
Annulus access 7112 and annular space wing passage 7114 provide passage for when producing well water filling or gas injection, and injection water or gas, under annulus access 7112 Injection Well, improve borehole pressure and permeability, actuate oil gas output.
The injection valve 723 of the second valve component 72 is arranged on produces flutter valve 722 front end, injects chemical agent by this injection valve 723 to the production wing passage 7211 in this second valve body 721, thus improves oil gas extraction efficiency.
In the present embodiment, production passage 7111 and annulus access 7112 are when oil gas is normally produced, be in mutually isolated situation, produce between passage 7111 and annulus access 7112 and be provided with U-tube 717, which is provided with cross-over connection valve 718, when cross-over connection valve 718 is opened, produce passage 7111 and be connected with annulus access 7112.
Subsea control modules 52, by controlling the actuator of each valve, controls the specific works situation of each valve, thus controls underwater operation production tree device.
Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (10)
1. a vertical double hose submerged production tree device, is characterized in that, this production tree device comprises:
Production tree device cap (1);
Framework (2), is connected with described production tree device cap (1) bottom;
Production tree device control panel (3), is arranged on described framework (2);
Leading truck (4), is connected with described framework (2) bottom;
Underwater control assembly (5), is arranged on one end of described framework (2);
Four guide pegs (6),
Described four guide pegs (6) are separately positioned on described framework (2) surrounding, and each described guide peg (6) top, middle part are connected with described framework (2), and this guide peg (6) bottom is connected with described leading truck (4);
Each described guide peg (6) inside is cavity;
Combination valve assembly (7), a part for described combination valve assembly (7) is arranged in described framework (2).
2. vertical double hose submerged production tree device as claimed in claim 1, is characterized in that, described combination valve assembly (7) comprises:
First valve component (71), is fixedly installed in described framework (2);
Second valve component (72), described second valve component (72) one end is connected with described first valve component (71);
3rd valve component (73), is connected with the other end of described second valve component (72).
3. vertical double hose submerged production tree device as claimed in claim 2, is characterized in that, described first valve component (71) comprises:
First valve body (711), is fixedly installed in described framework (2);
Described first valve body (711) is provided with the production passage (7111), the annulus access (7112) that run through its inside, and the top and bottom of described production passage (7111), the top and bottom of annulus access (7112) communicate with external equipment respectively;
Produce main valve (712), be arranged on described first valve body (711) middle and lower part, and be connected with described production passage (7111);
Annulus master valve (714), is arranged on described first valve body (711) middle and lower part, and is connected with described annulus access (7112);
Production pumping valve (713), is arranged on described first valve body (711) middle and upper part, and is connected with described production passage (7111);
Annular space pumping valve (715), is arranged on described first valve body (711) middle and upper part, and is connected with described annulus access (7112);
Described first valve body (711) inside is also provided with and produces wing passage (7113), annular space wing passage (7114); Described production wing passage (7113) is connected with described production passage (7111), and described annular space wing passage (7114) is connected with described annulus access (7112);
Cross-over connection valve (718), is arranged in institute's the first valve body (711), and is connected with described production passage (7111);
U-tube (717), is arranged on described first valve body (711) middle part; Described U-tube (717) one end is connected with described cross-over connection valve (718).
4. vertical double hose submerged production tree device as claimed in claim 3, it is characterized in that, described first valve body (71) also comprises: annulus wing valve (716), and described annulus wing valve (716) is arranged on described first valve body (711), and is connected with described annular space wing passage (7114); This annulus wing valve (716) is connected with described U-tube (717) other end.
5. vertical double hose submerged production tree device as claimed in claim 3, is characterized in that, described first valve body (71) also comprises: multiple test suite (7191), multiple control valve line interface (7192); Multiple described test suite (7191) is separately positioned on described first valve body (711) top, multiple described control valve line interface (7192) is separately positioned on described first valve body (711) bottom.
6. vertical double hose submerged production tree device as claimed in claim 5, is characterized in that, described second valve component (72) comprises:
Second valve body (721), described second valve body (721) one end is connected with described first valve body (711);
Described second valve body (721) is provided with the production wing passage (7211) running through its inside, and the production wing passage (7113) inner with described first valve body (711) is connected;
Produce flutter valve (722), be arranged on described second valve body (721), and be connected with described production wing passage (7113) by described production wing passage (7211);
Injection valve (723), is arranged on described second valve body (721), and is connected with described production wing passage (7211).
7. vertical double hose submerged production tree device as claimed in claim 6, is characterized in that, described 3rd valve component (73) comprises:
Reversal valve (731), described reversal valve (731) one end is connected with described second valve body (721) other end;
U-tube (732), described U-tube (732) openend is connected with described reversal valve (731) other end;
Choke valve (733), is connected with another openend of described U-tube (732);
Crossover tee valve (734), described crossover tee valve (734) one end is connected with described choke valve (733);
Flap valve (735), described flap valve (735) one end is connected with the other end of described crossover tee valve (734);
Bend pipe (736), one end of described bend pipe (736) is connected with described flap valve (735) other end;
Connector (737), is connected with the other end of described bend pipe (736).
8. vertical double hose submerged production tree device as claimed in claim 1, it is characterized in that, underwater control assembly (5) comprises:
Mounting baseplate (51), is arranged on one end of described framework (2);
Subsea control modules (52), is arranged on described mounting baseplate (51);
Accumulator (53), is arranged on described mounting baseplate (51), and is connected with described subsea control modules (52);
Balancing weight (54), is arranged on described mounting baseplate (51) bottom.
9. vertical double hose submerged production tree device as claimed in claim 8; it is characterized in that; described production tree device also comprises some pieces of cathodic protection metals (8), and described some pieces of cathodic protection metals (8) are arranged between described framework (2) and described leading truck (4).
10. vertical double hose submerged production tree device as claimed in claim 7, it is characterized in that, described production tree device also comprises:
Oil gas monitoring sensor (11), is arranged on described crossover tee valve (734);
Production monitoring sensor (12), is arranged on described control valve line interface (7192), is communicated with described production passage (7111);
Annular space monitoring sensor (13), is arranged on described control valve line interface (7192), is communicated with described annulus access (7112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811169.0U CN204344067U (en) | 2014-12-19 | 2014-12-19 | A kind of vertical double hose submerged production tree device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420811169.0U CN204344067U (en) | 2014-12-19 | 2014-12-19 | A kind of vertical double hose submerged production tree device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344067U true CN204344067U (en) | 2015-05-20 |
Family
ID=53227342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420811169.0U Active CN204344067U (en) | 2014-12-19 | 2014-12-19 | A kind of vertical double hose submerged production tree device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204344067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288564A (en) * | 2017-07-21 | 2017-10-24 | 中国海洋石油总公司 | The location structure of subsea control modules running tool |
-
2014
- 2014-12-19 CN CN201420811169.0U patent/CN204344067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288564A (en) * | 2017-07-21 | 2017-10-24 | 中国海洋石油总公司 | The location structure of subsea control modules running tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204663496U (en) | A kind of canned pair of down-hole electric submersible pump producing tubular column | |
| US12116869B2 (en) | Subsea methane production assembly | |
| CN105114043B (en) | A kind of system and method for improving deep water gas field gaslift water pumping gas production recovery ratio | |
| CN201778730U (en) | Vertical subsea production tree | |
| CN103382825A (en) | Improved flow module placement between a subsea tree and a tubing hanger spool | |
| CN203716939U (en) | Electric submersible pump production string suitable for manual lifting | |
| CN201778731U (en) | Oil pipe hanger for marine underwater horizontal oil production tree | |
| CN204344067U (en) | A kind of vertical double hose submerged production tree device | |
| CN204754881U (en) | Double -barrelled gas well flow string parallels | |
| CN203022700U (en) | Machine pumping-speed pipe composite water drainage gas production device | |
| CN204098872U (en) | Electric immersible pump well tubing string and electric immersible pump well | |
| CN212774240U (en) | Be applied to simple and easy production tree under water of shallow water | |
| CN204344052U (en) | The vertical production tree of a kind of plain type shallow water underwater | |
| CN201835785U (en) | Oil-water well device capable of automatically controlling pressure relief and liquid discharge as well as pumping discharged liquid to production pipeline | |
| US11261689B2 (en) | Subsea autonomous chemical injection system | |
| CN211397540U (en) | Pressure balance guider | |
| CN211314149U (en) | Underwater top-production type Christmas tree | |
| MX2011004687A (en) | Method for modifying an existing subsea arranged oil production well, and a thus modified oil production well. | |
| CN205036353U (en) | System for improve deep water gas field gas lift water pumping gas production recovery ratio | |
| CN203626689U (en) | Well head protection sealing connection device | |
| CN203347704U (en) | Well washing and oil draining device for pumping well | |
| CN202039816U (en) | Bidirectional back pressure valve | |
| CN206360685U (en) | A kind of marine drilling irrigates valve control system with deep-sea marine riser | |
| RU36428U1 (en) | Universal wellhead | |
| CN203685135U (en) | Electric submersible pump airlock automatic releasing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |