CN204532318U - A kind of pressing crack construction ball-throwing apparatus - Google Patents
A kind of pressing crack construction ball-throwing apparatus Download PDFInfo
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- CN204532318U CN204532318U CN201520103804.4U CN201520103804U CN204532318U CN 204532318 U CN204532318 U CN 204532318U CN 201520103804 U CN201520103804 U CN 201520103804U CN 204532318 U CN204532318 U CN 204532318U
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- pressing crack
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Abstract
The utility model discloses a kind of pressing crack construction ball-throwing apparatus, belong to oil gas drilling pressing crack construction equipment and construction method technical field; The piston push rod that described pressing crack construction ball-throwing apparatus comprises Master cylinder body and arranges in the inner, Master cylinder body inner chamber is divided into independently pitching chamber and pressure compensated cavity by piston push rod, end, pitching chamber is provided with valve I, pitching chamber is also provided with the goal pipeline of band valve II, by being with the connecting pipe of valve III to be communicated with between pitching chamber with pressure compensated cavity, pressure compensated cavity is provided with the relief pipeline I of band valve IV, is provided with the elastic mechanism resetted for piston push rod in Master cylinder body; Pressing crack construction ball-throwing apparatus of the present utility model is by introducing Master cylinder body by the pressure of pressing crack construction, and realize the pitching with pressure of pipeline in pressing crack construction process by process pressure balanced in Master cylinder body, pitching cost is effectively reduced compared to traditional ball-throwing apparatus, shorten the pitching cycle, and there is the basis realizing pitching process automation.
Description
Technical field
The utility model relates to a kind of pressing crack construction ball-throwing apparatus and pitching method thereof, especially one can continuously, automation carries out pressing crack construction ball-throwing apparatus and pitching method thereof, belongs to oil gas drilling pressing crack construction equipment and construction method technical field.
Background technology
When different well section is constructed in large-scale segmentation fracturing, by the ball seat specification of sliding sleeve preset in well section, need successively drop into the sealed spheroid of dimension, under sealed spheroid effect, open the sliding sleeve of corresponding well section, then fracturing work construction is carried out to this well section.
For ensureing job safety during conventional pitching operation, first must stop infusion operation, closing production tree main switch, the pressure in pressure break main pipeline be let out to the greatest extent, plug valve can be opened and sealed spheroid is dropped in pressure break main pipeline, then cut-out tap valve.When opening production tree main switch, the pressure reduction existed in well and between pressure break main pipeline can enter well to steel ball and impact, and for eliminating this impact, before unlatching production tree main switch, also will suppress operation to pressure break main pipeline.And whole operating process needs staff to enter in high-voltage construction region carries out manual operation, there is larger potential safety hazard.
The conservative estimation of conventional single pitching process needs more than 10 minutes consuming time, and during Large Construction, main pressure number of devices is more, and for ensureing construction operation continuity to greatest extent, during usual pitching, all masters are installed with standby all maintenances idle running armed state.Enable by the construction of large-scale well staged fracturing that 12 () is main is installed with standby calculating: if pitching 6 times, 10 minutes consuming time of single pitching operation, the operation of whole work progress single-throw ball adds up 1 hours consuming time, 12 () main is installed with the thousands of unit of fuel cost needed for standby equal idle running 1 hour, too increases exhaust emissions amount aggravation atmosphere pollution.
In addition in existing pressing crack construction, need to inject enough displacement fluids the proppant (or acid solution) in well is pressed into target payzone completely before target payzone pressing crack construction terminates, the pitching operation of next target payzone just can be carried out: spheroid enters in well by conventional pitching operating type after proppant (or acid solution) is pressed into target payzone completely, release liquid carries spheroid, and by infusion, spheroid is delivered to target payzone.This operator scheme adds construction liquid consumption, also virtually adds construction running cost and later stage cost of sewage disposal.
Summary of the invention
Goal of the invention of the present utility model is: for above-mentioned Problems existing, a kind of pressing crack construction ball-throwing apparatus and pitching method thereof are provided, solve Problems existing in existing operation, the effective saving pitching activity duration, reduce pitching running cost, reduce simultaneously or eliminate the risk of pitching operation with high pressure, and have can the advantage of automation mechanized operation.
The technical solution adopted in the utility model is as follows:
A kind of pressing crack construction ball-throwing apparatus, comprise Master cylinder body and piston push rod, described piston push rod is arranged in Master cylinder body, and can move along Master cylinder body inner chamber bidirectional reciprocating, is sealed and matched and Master cylinder body inner chamber is divided into independently pitching chamber and pressure compensated cavity between described Master cylinder body and piston push rod; Master cylinder body end, place, described pitching chamber is provided with valve I, and pitching chamber is also provided with goal pipeline, and described goal pipeline is provided with valve II; Described pitching chamber is communicated with by connecting pipe with between pressure compensated cavity, described connecting pipe is provided with valve III; Described pressure compensated cavity is provided with relief pipeline I, and described relief pipeline I is provided with valve IV; The elastic mechanism resetted for piston push rod is provided with in described Master cylinder body.
Further, described pitching chamber is provided with the pressure guiding pipe for being connected with pressure break main pipeline, described pressure guiding pipe is provided with valve V.
Further, described elastic mechanism is Compress Spring, and described Compress Spring is arranged in pressure compensated cavity.
Further, be provided with the guide rod along Master cylinder body axis in described pressure compensated cavity, piston push rod offers the guide groove with guide rod adaptation vertically, and piston push rod is assemblied in by its guide groove on the guide rod in Master cylinder body.
Further, described pitching chamber is provided with relief pipeline II, and described relief pipeline II is provided with valve VI.
Pressing crack construction ball-throwing apparatus of the present utility model, further comprises the ball storehouse be connected with described goal pipeline, and the outlet in described ball storehouse is provided with spheroid limited diameter and passes through mechanism.
The pitching method of pressing crack construction ball-throwing apparatus of the present utility model, comprises the steps:
A, by-pass valve control I, valve II and valve III is closed condition, and valve IV is opening, spheroid is put into goal pipeline;
B, Open valve II, make spheroid enter the goal pipeline place section in pitching chamber, and valve-off II;
C, the fluid in pressure break main pipeline is introduced pitching chamber, piston push rod enters to the thruster of pressure compensated cavity and makes elastic mechanism generation elastic deformation under the effect of fluid pressure, and spheroid enters the Master cylinder body place section in pitching chamber, and complete Open valve I;
D, valve-off IV, Open valve III, fluid enters pressure compensated cavity by connecting pipe and makes pressure balance between pitching chamber and pressure compensated cavity, makes piston push rod enter to the thruster of pitching chamber, and pushed by spheroid in pressure break main pipeline under the effect of elastic mechanism;
E, valve-off III, the pressure in pressure compensated cavity gushes by Open valve IV, and piston push rod enters to the thruster of pressure compensated cavity and makes elastic mechanism generation elastic deformation under the effect of pitching cavity fluid pressure;
After f, piston push rod are advancing to the position, pitching chamber and pressure break main pipeline cut off by valve-off I;
G, gushed by the pressure in pitching chamber, piston push rod makes piston push rod enter to the thruster of pitching chamber, reset under the effect of elastic mechanism, completes a pitching process.
Further, described pitching chamber is provided with the pressure guiding pipe for being connected with pressure break main pipeline, described pressure guiding pipe is provided with valve V, in described step c, the fluid in pressure break main pipeline is introduced pitching chamber and be operating as: the fluid in pressure break main pipeline is introduced pitching chamber by Open valve V.
Further, described pitching chamber is provided with relief pipeline II, and described relief pipeline II is provided with valve VI, and in described step g, pitching chamber is carried out pressure by Open valve VI and gushed.
Further, described goal pipeline is connected with ball storehouse, and the outlet in described ball storehouse is provided with spheroid limited diameter by mechanism, also comprises and spheroid is put into ball storehouse in order, and successively spheroid is sent into goal pipeline by spheroid limited diameter by mechanism before described pitching operation.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
(1) described pressing crack construction ball-throwing apparatus is skillfully constructed, reasonable in design, by the pressure of pressing crack construction is introduced Master cylinder body, the process of cylinder interior pressure balance realizes pitching, pressing crack construction ball-throwing apparatus of the present utility model can pitching with pressure in the process of pressure break main pipeline pressing crack construction, and the serialization of pitching process can be realized, pitching cost is effectively reduced compared to traditional ball-throwing apparatus, shorten the pitching cycle, and there is the basis realizing pitching process automation, operating personnel can away from high-pressure area operated from a distance, ensure that the safety of pitching process, this device also has miniaturization and the advantage of running cost degradation in addition, greatly reduce transport and the installation cost of construction,
(2) based on this pressing crack construction ball-throwing apparatus and pitching method design, achieve pipe pressurized, pitching under the condition of sequential production, this will make traditional pitching operation be changed: by calculating the piping volume between target payzone and next target payzone, the displacement fluid calculating volume can be injected before target payzone pressing crack construction terminates, pressing crack construction ball-throwing apparatus of the present invention and pitching method can be adopted to drop in well by spheroid after the displacement fluid calculating volume has injected, with release liquid, spheroid is delivered to next target payzone again, and then start the pressing crack construction of next target payzone.This greatly saves the consumption cubical content of pipeline (between next target payzone and the ground) of displacement fluid compared to traditional pitching operation, and saves pitching operating time and equipment operation cost.
Accompanying drawing explanation
The utility model illustrates by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is pressing crack construction ball-throwing apparatus structural representation of the present utility model;
Fig. 2 is pressing crack construction ball-throwing apparatus operating process figure A of the present utility model;
Fig. 3 is pressing crack construction ball-throwing apparatus operating process figure B of the present utility model;
Fig. 4 is pressing crack construction ball-throwing apparatus operating process figure C of the present utility model;
Fig. 5 is pressing crack construction ball-throwing apparatus operating process figure D of the present utility model;
Fig. 6 is pressing crack construction ball-throwing apparatus operating process figure E of the present utility model.
Mark in figure: 1-Master cylinder body, 101-valve I, 102-guide groove, 103-guide rod, 104-Compress Spring, 105-valve III, 106-valve V, 107-valve IV, 2-piston push rod, 3-pitching chamber, 4-pressure compensated cavity, 5-goal pipeline, 501-valve II, 502-valve VI, 6-ball storehouse, 601-spheroid limited diameter are by mechanism, 7-spheroid, 8-pressure break main pipeline.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment
Pressing crack construction ball-throwing apparatus of the present utility model, its structure as shown in Figure 1, comprise Master cylinder body 1 and piston push rod 2, described piston push rod 2 is arranged in Master cylinder body 1, and can move along Master cylinder body 1 inner chamber bidirectional reciprocating, be sealed and matched between described Master cylinder body 1 and piston push rod 2 and Master cylinder body 1 inner chamber be divided into independently pitching chamber 3 and pressure compensated cavity 4; Master cylinder body 1 end, place, described pitching chamber 3 is provided with valve I 101, and pitching chamber 3 is also provided with goal pipeline 5, and described goal pipeline 5 is provided with valve II 501; Described pitching chamber 3 is communicated with by connecting pipe with between pressure compensated cavity 4, described connecting pipe is provided with valve III 105; Described pressure compensated cavity 4 is provided with relief pipeline I, and described relief pipeline I is provided with valve IV 107; The elastic mechanism resetted for piston push rod 2 is provided with in described Master cylinder body 1.
Described elastic mechanism can be installed in pitching chamber 3 or pressure compensated cavity 4, elastic mechanism can be existing form or the structure design such as elasticity of compression mechanism or tensile elasticity mechanism, its object is to store pressure break main pipeline 8 fluid pressure, and realize pitching by earth pressure release.
The end, pitching chamber 3 of described Master cylinder body 1 is that pipe joint is for being connected with pressure break main pipeline 8, described pressure compensated cavity 4 end face is closed, its main operational principle of pressing crack construction ball-throwing apparatus is as follows: fluid pressure in pressure break main pipeline is introduced (by valve I 101 or separately establish impulse pipeline) pitching chamber 3, piston push rod 2 advances to pressure compensated cavity 4 and makes elastic mechanism generation elastic deformation under pressure, valve III 105 is for the pressure balance of pitching chamber 3 and pressure compensated cavity 4, two chamber pressure equilibrium process Elastic mechanism release resilient force spheroids enter pressure break main pipeline.
In the present embodiment, described Master cylinder body 1 and goal pipeline 5 are arranged with axial at right angle setting, the vertical distance of valve II 501 distance piston push rod 2 outer wall of goal pipeline 5 with the maximum gauge of pitching for Reference Design, the interim spatial accommodation after being entered by valve II 501 to provide spheroid.The external diameter of piston push rod 2 is less than the internal diameter in Master cylinder body 1 pitching chamber 3 in the present embodiment in addition, and pressure can be discharged smoothly by the pipe joint of connecting pipe.
In the present embodiment, described pitching chamber 3 is provided with the pressure guiding pipe for being connected with pressure break main pipeline, described pressure guiding pipe is provided with valve V 106, pressure for being constructed by pressure in main pipeline introduces pitching chamber 3, compared to valve I 101 impulse, have safe and handling strong advantage, can also effectively avoid in addition in valve I 101 opening process may to the damage of piston push rod 2 end face and valve I 101 spool.
In the present embodiment, described elastic mechanism is Compress Spring 104, described Compress Spring 104 is arranged in pressure compensated cavity 4, the navigation designing for piston push rod 2 motion guide is also comprised: in described pressure compensated cavity 4, be provided with the guide rod 103 along Master cylinder body 1 axis in pressure compensated cavity 4, piston push rod 2 offers the guide groove 102 with guide rod 103 adaptation vertically, and piston push rod 2 is assemblied in by its guide groove 102 on the guide rod 103 in Master cylinder body 1.Fig. 1 is the apparatus structure schematic diagram after Compress Spring 104 compresses by piston push rod 2.
The pressing crack construction ball-throwing apparatus of the present embodiment, described pitching chamber 3 is provided with relief pipeline II, and described relief pipeline II is provided with valve VI 502, and described relief pipeline II is arranged on goal pipeline 5.
Pressing crack construction ball-throwing apparatus of the present utility model, also comprise the ball storehouse 6 be connected with described goal pipeline 5, the outlet in described ball storehouse 6 is provided with spheroid limited diameter by mechanism 601, spheroid limited diameter is allow the mechanism by certain diameter spheroid by mechanism 601, comprise the lever be arranged in pipeline and the lever hoisting mechanism be connected with lever, lever hoisting mechanism is arranged at pipeline external, passing through of spheroid is controlled by promoting the width controlling lever and internal diameter of the pipeline, suppose that steel ball spheroid format diameter is 40mm, setting lever hoisting mechanism to journey that lever is begun a new line by control panel is 42mm, the steel ball spheroid of 40mm is made to be fallen into valve II 501 top smoothly by lever, diameter is greater than the ball of 40mm then not by lever.
In the present embodiment, described valve I 101 and valve II 501 are stopcock structure, and driven by pneumatic drive unit or electric drive unit, other valve types can be selected according to operating mode.
The pitching method of pressing crack construction ball-throwing apparatus described in the utility model, comprises the steps:
A, by-pass valve control I 101, valve II 501 and valve III 105 is closed condition, and valve IV 107 is opening, and spheroid 7 is put into goal pipeline 5;
B, Open valve II 501, make spheroid 7 enter the goal pipeline 5 place section in pitching chamber 3, and valve-off II 501, as shown in Figure 2;
C, by pressure break main pipeline fluid introduce pitching chamber 3, piston push rod 2 enters to pressure compensated cavity 4 thruster and makes elastic mechanism generation elastic deformation under the effect of fluid pressure, spheroid 7 enters the Master cylinder body 1 place section in pitching chamber 3, and complete Open valve I 101, as shown in Figure 3;
D, valve-off IV 107, Open valve III 105, fluid enters pressure compensated cavity 4 by connecting pipe and makes pressure balance between pitching chamber 3 and pressure compensated cavity 4, makes piston push rod 2 enter to pitching chamber 3 thruster under the effect of elastic mechanism, and spheroid 7 is pushed in pressure break main pipeline, as shown in Figure 4;
E, valve-off III 105, the pressure in pressure compensated cavity 4 gushes by Open valve IV 107, and piston push rod 2 enters to the thruster of pressure compensated cavity 4 and makes elastic mechanism generation elastic deformation under the effect of pitching chamber 3 fluid pressure, as shown in Figure 5;
After f, piston push rod 2 are advancing to the position, pitching chamber 3 and pressure break main pipeline cut off by valve-off I 101;
G, gushed by the pressure in pitching chamber 3, piston push rod 2 makes piston push rod 2 enter to pitching chamber 3 thruster, reset under the effect of elastic mechanism, as shown in Figure 6, completes a pitching process.
The pitching method of pressing crack construction ball-throwing apparatus described in the utility model, further, described pitching chamber 3 is provided with the pressure guiding pipe for being connected with pressure break main pipeline, described pressure guiding pipe is provided with valve V 106, in described step c, the fluid in pressure break main pipeline is introduced pitching chamber 3 and be operating as: the fluid in pressure break main pipeline is introduced pitching chamber 3 by Open valve V 106.
The pitching method of described pressing crack construction ball-throwing apparatus, further, described pitching chamber 3 is provided with relief pipeline II, and described relief pipeline II is provided with valve VI 502, and in described step g, pitching chamber 3 is carried out pressure by Open valve VI 502 and gushed.
The pitching method of described pressing crack construction ball-throwing apparatus, further, described goal pipeline 5 is connected with ball storehouse 6, the outlet in described ball storehouse 6 is provided with spheroid limited diameter by mechanism 601, also comprise before described pitching operation and spheroid is put into ball storehouse 6 in order, and successively spheroid is sent into goal pipeline 5 by spheroid limited diameter by mechanism 601.
Pressing crack construction ball-throwing apparatus of the present utility model, its core design is the power using the pressure in pressure break main pipeline as ball-throwing apparatus work, make use of the characteristic that fracturing liquid compressibility is low simultaneously, has carried out the whole course of work.Adopt piston push rod 2 ball to be advanced the schematic design of pressure break main pipeline, effectively solve and cause spheroid naturally to fall into the problem of difficulty because of pressurised fluid stream body flowing in pressure break main pipeline.
Pressing crack construction ball-throwing apparatus of the present utility model and method, be skillfully constructed, reasonable in design, by the pressure of pressing crack construction is introduced Master cylinder body, the process of cylinder interior pressure balance realizes pitching, pressing crack construction ball-throwing apparatus of the present utility model can pitching with pressure in the process of pressure break main pipeline pressing crack construction, and the serialization of pitching process can be realized, pitching cost is effectively reduced compared to traditional ball-throwing apparatus, shorten the pitching cycle, and there is the basis realizing pitching process automation, operating personnel can away from high-pressure area operated from a distance, ensure that the safety of pitching process, this device also has miniaturization and the advantage of running cost degradation in addition, greatly reduce transport and the installation cost of construction.
Based on this pressing crack construction ball-throwing apparatus and pitching method design, achieve pipe pressurized, pitching under the condition of sequential production, this will make traditional pitching operation be changed: by calculating the piping volume between target payzone and next target payzone, the displacement fluid calculating volume can be injected before target payzone pressing crack construction terminates, pressing crack construction ball-throwing apparatus of the present invention and pitching method can be adopted to drop in well by spheroid after the displacement fluid calculating volume has injected, with release liquid, spheroid is delivered to next target payzone again, and then start the pressing crack construction of next target payzone.This greatly saves the consumption cubical content of pipeline (between next target payzone and the ground) of displacement fluid compared to traditional pitching operation, and saves pitching operating time and equipment operation cost.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. a pressing crack construction ball-throwing apparatus, it is characterized in that: comprise Master cylinder body (1) and piston push rod (2), described piston push rod (2) is arranged in Master cylinder body (1), and can move along Master cylinder body (1) inner chamber bidirectional reciprocating, be sealed and matched between described Master cylinder body (1) and piston push rod (2) and Master cylinder body (1) inner chamber be divided into independently pitching chamber (3) and pressure compensated cavity (4); Master cylinder body (1) end, described pitching chamber (3) place is provided with valve I (101), and pitching chamber (3) are also provided with goal pipeline (5), and described goal pipeline (5) is provided with valve II (501); Described pitching chamber (3) is communicated with by connecting pipe with between pressure compensated cavity (4), described connecting pipe is provided with valve III (105); Described pressure compensated cavity (4) is provided with relief pipeline I, described relief pipeline I is provided with valve IV (107); The elastic mechanism resetted for piston push rod (2) is provided with in described Master cylinder body (1).
2. pressing crack construction ball-throwing apparatus as claimed in claim 1, is characterized in that: described pitching chamber (3) is provided with the pressure guiding pipe for being connected with pressure break main pipeline, described pressure guiding pipe is provided with valve V (106).
3. pressing crack construction ball-throwing apparatus as claimed in claim 1, is characterized in that: described elastic mechanism is Compress Spring (104), and described Compress Spring (104) is arranged in pressure compensated cavity (4).
4. pressing crack construction ball-throwing apparatus as claimed in claim 1, it is characterized in that: be provided with along the axial guide rod (103) of Master cylinder body (1) in described pressure compensated cavity (4), piston push rod (2) offers the guide groove (102) adaptive with guide rod (103) vertically, and piston push rod (2) is assemblied in by its guide groove (102) on the guide rod (103) in Master cylinder body (1).
5. pressing crack construction ball-throwing apparatus as claimed in claim 1, is characterized in that: described pitching chamber (3) is provided with relief pipeline II, described relief pipeline II is provided with valve VI (502).
6. pressing crack construction ball-throwing apparatus as claimed in claim 1, it is characterized in that: also comprise the ball storehouse (6) be connected with described goal pipeline (5), the outlet of described ball storehouse (6) is provided with spheroid limited diameter by mechanism (601).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520103804.4U CN204532318U (en) | 2015-02-13 | 2015-02-13 | A kind of pressing crack construction ball-throwing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520103804.4U CN204532318U (en) | 2015-02-13 | 2015-02-13 | A kind of pressing crack construction ball-throwing apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN204532318U true CN204532318U (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520103804.4U Withdrawn - After Issue CN204532318U (en) | 2015-02-13 | 2015-02-13 | A kind of pressing crack construction ball-throwing apparatus |
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| Country | Link |
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| CN (1) | CN204532318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712300A (en) * | 2015-02-13 | 2015-06-17 | 陈介骄 | Fracturing construction pitching device and pitching method thereof |
-
2015
- 2015-02-13 CN CN201520103804.4U patent/CN204532318U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712300A (en) * | 2015-02-13 | 2015-06-17 | 陈介骄 | Fracturing construction pitching device and pitching method thereof |
| CN104712300B (en) * | 2015-02-13 | 2017-11-10 | 中石化石油工程技术服务有限公司 | A kind of pressing crack construction ball-throwing apparatus and its pitching method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160206 Address after: 100101 Beijing City, Chaoyang District Hui Street No. six twelfth floor Patentee after: SINOPEC OILFIELD SERVICE CORPORATION Patentee after: SINOPEC XINAN OILFIELD SERVICE CORPORATION Address before: 618000 Deyang province Sichuan City Jingyang District Huaihe Street No. 112 Patentee before: Chen Jiejiao |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20171110 |
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| AV01 | Patent right actively abandoned |