CN206987779U - A kind of HTHP oil well oil pump blowout prevention valve - Google Patents
A kind of HTHP oil well oil pump blowout prevention valve Download PDFInfo
- Publication number
- CN206987779U CN206987779U CN201720901258.8U CN201720901258U CN206987779U CN 206987779 U CN206987779 U CN 206987779U CN 201720901258 U CN201720901258 U CN 201720901258U CN 206987779 U CN206987779 U CN 206987779U
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- installation cavity
- ring
- blowout prevention
- gear shaft
- hthp
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Abstract
The utility model discloses a kind of HTHP oil well oil pump blowout prevention valve；Belong to blowout prevention valve technical field；Technical points include body, the body is vertically provided with the first installation cavity, oil recovery sucker rod is equipped with the first installation cavity, sealing structure and lower sealing structure are respectively equipped between the first installation cavity upper and lower ends and oil recovery sucker rod, upper, movable sleeve is provided with upper press ring and lower pressure ring on oil recovery sucker rod outer wall between lower sealing structure, upper, lower pressure ring periphery is provided with gear shaft, gear shaft with it is upper, screw thread and lower screw thread are respectively equipped with the relative inwall of lower pressure ring, upper screw thread is threadedly coupled with upper press ring, lower screw thread is threadedly coupled with lower pressure ring, when gear shaft rotates, on, the lower pressure ring direction of motion is opposite；The utility model aims to provide a kind of stable performance, compact-sized, sealed reliable, HTHP oil well oil pump blowout prevention valve easy to use and excellent effect；For preventing dusty gas from discharging and ensureing the safety of production.
Description
Technical field
A kind of blowout prevention valve is the utility model is related to, more specifically, more particularly to a kind of HTHP oil well oil pump blowout prevention
Valve.
Background technology
Valve gate technology makes rapid progress, and in long-term design, production, using practice, have accumulated rich experience, constantly changes
Enter new construction, new technology, new material, to meet new application, new demand that all trades and professions increasingly propose.With reference to current environmental protection,
Ideas of energy-saving, constantly weed out the old and bring forth the new, progressively to it is higher, more preferable, more comprehensively, more perfect direction develops.Oil extraction in oil field, it is
Prevent that dusty gas from discharging and the safety of production, in oil well pump end, i.e., needs to install valve, this valve is effective at earth's surface
Prevent the pernicious gases such as oil gas, methane, hydrogen sulfide, high-temperature steam to be directly discharged in air, cause atmosphere pollution, while be also
Save the loss of the energy.Due to the structure that is made up of piston cylinder and oil recovery sucker rod of oil pumping pump configuration, different from pipeline,
The valves such as conventional ball valve, stop valve, gate valve, check-valves, plug valve can not realize keying work, therefore, in the condition of work
Lower use can realize keying and more reliable novel valve --- the blowout prevention valve that works.
At present, the blowout prevention valve used in whole oil field production field, sealed using a pair of cone rubber.But
As well recovery technology continues to develop, the blowout prevention valve temperature in use of the type is restricted, it is impossible to meets the hair of oil recovery technique
Exhibition demand.Because high-quality oil to be exploited all is hidden in 2000 to 3000 meters of depth under earth's surface, the oil at this is mostly solid
State or thick liquid, for the ease of recovering the oil, the oil of solid-state or thick state need to be melted into the relatively low liquid of ratio of viscosities, used
14MPa pressure is injected on ground and the steam of 350 DEG C of temperature is melted, because the oil well pump liquid larger to viscosity has preferably
Sealing, and high temperature and high pressure gas are easy to channel at blowout prevention valve through oil well pump, cause the blowout prevention valve of rubber seal to meet not
Operating mode, the blowout prevention valve of normal condition rubber seal can only be worked with a gas injection, caused oil recovery maintenance cost high, influenceed to recover the oil
Production work.Under 14MPa pressure and 350 DEG C of high temperature and high pressure condition environment, using rubber seal be can not meet demand, be
This is changed by the design to structure, the conversion of sealing principle, the use of new material.Inventing a can be satisfied with the operating mode
HTHP blowout prevention valve.
Utility model content
The purpose of this utility model is to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of stable performance, it is compact-sized,
Sealed reliable, HTHP oil well oil pump blowout prevention valve easy to use and excellent effect.
What the technical solution of the utility model was realized in：A kind of HTHP oil well oil pump blowout prevention valve, including body,
Wherein described body is vertically provided with the first installation cavity, oil recovery sucker rod is equipped with the first installation cavity, first
Sealing structure and lower sealing structure are respectively equipped between installation cavity upper and lower ends and oil recovery sucker rod, in upper and lower sealing knot
Movable sleeve is provided with upper press ring and lower pressure ring on oil recovery sucker rod outer wall between structure, and gear shaft is provided with upper and lower pressure ring periphery,
Upper screw thread and lower screw thread are respectively equipped with the gear shaft inwall relative with upper and lower pressure ring, upper screw thread is threadedly coupled with upper press ring, under
Screw thread is threadedly coupled with lower pressure ring, and when gear shaft rotates, the upper and lower pressure ring direction of motion is opposite；Body in gear shaft side
On be provided be mutually perpendicular to the first installation cavity and the second installation cavity of mutual conduction in the horizontal direction, it is movable in the second installation cavity
Valve rod is provided with, the end that valve rod is located at outer body is connected with operation handwheel, the end and gear shaft that valve rod is located within the body
Between linked by link gear.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, the first installation cavity upper end is matched somebody with somebody with oil recovery sucker rod
Close and form upper annular mounting groove；The upper sealing structure is fine by some opening carbon being sequentially stacked in upper annular mounting groove
Graphite is formed.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, the first installation cavity lower end is matched somebody with somebody with oil recovery sucker rod
Close and form lower annular mounting groove；The lower sealing structure is fine by some opening carbon being sequentially stacked in lower annular mounting groove
Graphite is formed.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, the link gear by parallel key by being arranged on valve rod
The drive bevel gear for the end being located within the body and it is arranged on by parallel key on gear shaft outer wall and mutual with drive bevel gear
The driven wheel of differential composition of engagement.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, the body is by the valve body that cooperates and is arranged on valve
The bonnet composition of body upper end；First installation cavity is by the first step hole that is arranged on valve body and is arranged on bonnet and with
The second step hole that one stepped hole is engaged is formed；The upper sealing structure is located at second step hole inner top, the lower sealing
Structure is located at first step hole inner bottom part；The annular installation corresponding with gear shaft is respectively equipped with bonnet lower surface and valve body
Groove, be formed separately at the both ends of gear shaft vertically with the one-to-one mounting ring of annular mounting groove, in each annular mounting groove
It is interior provided with the sliding bearing being connected with each mounting ring.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, annular is provided between the contact site of the valve body and bonnet
Graphite wound gasket piece.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, positioning is provided with the second installation cavity corresponding to the valve rod
Ring, is provided with the first rolling bearing in the second installation cavity on the inside of locating ring, and the first rolling bearing is folded in locating ring and linkage
Between mechanism；Some sealing rings have sequentially been stacked in the second installation cavity on the outside of locating ring, have been set in sealing ring outer face
There is gland, gland is fastened with body by studs and hex nut.
In a kind of above-mentioned HTHP oil well oil pump blowout prevention valve, between valve rod and the gland outer face formed with
Mounting groove, is provided with the second rolling bearing in mounting groove, and valve rod is connected by the second rolling bearing with gland；In the second rolling
Valve rod corresponding to dynamic bearing outer end is provided with jump ring.
After the utility model uses said structure, coordinated by operating handwheel, valve rod and link gear, rotate gear shaft
Rate smoothing, stably, while coordinate gland and sealing ring to make to keep good sealing to be imitated between valve rod and the second installation cavity
Fruit, prevent high-temperature gas from leaking；Upper and lower sealing structure uses the high-carbon low-sulfur carbon fibre graphite of pbz polymer structure nano technology,
With wear-resisting, high temperature resistant and anti-stick function, while meeting 350 DEG C of applying working condition, it is easy to change online, is knocked without taking apart
Head machine lifting bar apparatus；Gear shaft rotates and drives upper press ring and lower pressure ring to carry out counter motion, pressure ring by corresponding screw thread
The opening carbon fibre graphite in corresponding mounting groove is coordinated to reach simultaneously to being sealed between the first installation cavity and oil recovery sucker rod
The effect for controlling upper and lower pressure ring to compress or unclamp, control accuracy is high, good sealing effect, is not influenceing oil well pump normal work
In the case of, ensure that high temperature and high pressure gas do not leak.
Brief description of the drawings
The utility model is described in further detail for embodiment in below in conjunction with the accompanying drawings, but does not form to this reality
With new any restrictions.
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of the utility model body；
Fig. 3 is the partial enlargement structural representation at A in Fig. 1；
Fig. 4 is the partial enlargement structural representation at B in Fig. 1.
In figure：Body 1, valve body 1a, bonnet 1b, the first installation cavity 2, first step hole 2a, second step hole 2b, oil extraction pump
Piston rod 3, upper sealing structure 4, lower sealing structure 5, upper press ring 6, lower pressure ring 7, gear shaft 8, mounting ring 8a, the second installation cavity 9,
Valve rod 10, operation handwheel 11, drive bevel gear 12, driven wheel of differential 13, sliding bearing 14, graphite wound gasket piece 15, locating ring
16th, the first rolling bearing 17, sealing ring 18, gland 19, the second rolling bearing 20, jump ring 21.
Embodiment
Refering to shown in Fig. 1 to Fig. 4, a kind of HTHP oil well oil pump blowout prevention valve of the present utility model, including body 1, institute
State body 1 and be vertically provided with the first installation cavity 2, oil recovery sucker rod 3 is equipped with the first installation cavity 2, oil extraction pump is lived
General 2000 meters of stopper rod length arrives ten thousand metres, shaft diameter 25,28,32 millimeters of equidimensions.The upper end of first installation cavity 2 is with adopting
Oil pump piston bar 3 cooperatively forms annular mounting groove.The lower end of first installation cavity 2 cooperatively forms down with oil recovery sucker rod 3
Annular mounting groove.The body 1 is made up of the valve body 1a to cooperate with the bonnet 1b for being arranged on valve body 1a upper ends；Valve body 1a and
It is fixedly connected between bonnet 1b by studs with hex nut.There are tapered thread and oil well pump in the outside cylinder of valve body 1a lower ends
The external pipe of system connects, be again provided with the bonnet 1a upper ends outside cylinder tapered thread of size identical with valve body 1a with
Oil country tubular good equipment connects.
To improve the sealing property between valve body 1a and bonnet 1b, it is provided between the contact site of the valve body 1a and bonnet 1b
The graphite wound gasket piece 15 of annular.Graphite wound gasket piece 15 has thermostabilization, self-lubricating, not corrosion-resistant, not aging, the crowd such as embrittlement
More advantages.
Meanwhile first installation cavity 2 by the first step hole 2a that is arranged on valve body 1a and be arranged on bonnet 1b and
The second step hole 2b being engaged with first step hole 2a is formed；The upper and lower ends of the first installation cavity 2 and oil recovery sucker rod 3 it
Between be respectively equipped with sealing structure 4 and lower sealing structure 5.The upper sealing structure 4 is sequentially stacked in upper annular by some
Opening carbon fibre graphite in mounting groove is formed, and the upper sealing structure 4 is located at second step hole 2b inner tops.The lower sealing knot
Structure 5 is made up of some opening carbon fibre graphite being sequentially stacked in lower annular mounting groove, and the lower sealing structure 5 is positioned at the
One stepped hole 2a inner bottom parts.In the present embodiment, upper-lower seal structure is sequentially superimposed composition, root using four opening carbon fibre graphite
According to concrete condition, increase or decrease to the being adapted to property of quantity for the carbon fibre graphite that is open.Opening carbon fibre graphite uses pbz polymer
The high-carbon low-sulfur carbon fibre graphite of structure nano technology, there is wear-resisting, high temperature resistant and anti-stick function, meet 350 DEG C of use work
While condition, it is easy to change online, without taking machine lifting bar apparatus of kowtowing apart.
Movable sleeve is provided with upper press ring 6 and lower pressure ring 7 on the outer wall of oil recovery sucker rod 3 between upper and lower sealing structure 5,
Upper press ring 6 and lower pressure ring 7 use aluminum-bronze material, have wear-resistant self-lubricating performance.Gear is provided with the upper and lower periphery of pressure ring 6,7
Axle 8, gear shaft 8 use 304SS as material, QPQ process for treating surface, and case hardness is handled and arrives HV1024, existing high abrasion,
Low lubricating coefficient.The annular mounting groove corresponding with gear shaft 8 is respectively equipped with bonnet 1b lower surfaces and valve body 1a, in gear
The both ends of axle 8 vertically be formed separately with the one-to-one mounting ring 8a of annular mounting groove, be provided with each annular mounting groove
The sliding bearing 14 being connected with each mounting ring 8a.Preferably, sliding bearing 14 is ceramic slide bearing, to reach resistant to elevated temperatures work
With its finish should reach more than 1.6 μm, reduce the frictional force between adjacent parts.
Gear shaft 8 and upper and lower pressure ring 6, screw thread and lower screw thread, upper screw thread and upper pressure are respectively equipped with 7 relative inwalls
Ring 6 is threadedly coupled, and in the present embodiment, upper screw thread is right-hand thread, and phase interworking is provided between corresponding gear shaft and upper press ring 6
The spring pin hole and spring catch of conjunction；Lower screw thread is threadedly coupled with lower pressure ring 7, and in the present embodiment, lower screw thread is left-hand thread, and right
The spring pin hole and spring catch to cooperate is provided between the gear shaft and lower pressure ring 7 answered.The hand of spiral of upper and lower screw thread is not
It is fixed, as long as the hand of spiral of screw thread is opposite up and down.When gear shaft 8 rotates, the upper and lower direction of motion of pressure ring 6,7 is opposite；
On the body 1 of the side of gear shaft 8 in the horizontal direction be provided be mutually perpendicular to the first installation cavity 2 and mutual conduction second installation
Chamber 9, is movably set with valve rod 10 in the second installation cavity 9, and described valve rod 3 uses 17-4PH materials, QPQ surface treatment skills
Art, case hardness processing is improved into transverse strength to HV900, improves anti-wear performance.
The end that valve rod 10 is located at the outside of body 1 is connected with operation handwheel 11, and valve rod 10 is located at end and tooth in body 1
Linked between wheel shaft 8 by link gear.The link gear by parallel key by being arranged on the end that valve rod 10 is located in body 1
The drive bevel gear 12 in portion and it is arranged on by parallel key on the outer wall of gear shaft 8 and intermeshing driven with drive bevel gear 12
Bevel gear 13 forms.Drive bevel gear 12 and driven wheel of differential 13 are hard by surface using 304SS materials, QPQ process for treating surface
HV1024 is arrived in degree processing, improves contact strength and the resistance to elevated temperatures requirement of the flank of tooth, anti-grinding tooth.Link gear can also use snail
The drive device commonly used in the art such as screw gearing or electric performance device.
In order to ensure to have between the installation cavity 9 of valve rod 10 and second good sealing effectiveness, corresponding to the valve rod 10
Being provided with locating ring 16 in two installation cavitys 9, the second installation cavity 9 in the inner side of locating ring 16 is interior to be provided with the first rolling bearing 17, and first
Rolling bearing 17 is folded between locating ring 16 and link gear, and locating ring 16 and linkage can be reduced by the first rolling bearing
Friction loss between mechanism, rotating effect is improved, rotates valve rod 10 more stable.The second installation cavity in the outside of locating ring 16
Sequentially be stacked some sealing rings 18 in 9, in the present embodiment, sealing ring 18 using three carbon fibre graphite square filler,
The number of sealing ring 18 can suitably be adjusted according to actual conditions, and carbon fibre graphite uses the height of pbz polymer structure nano technology
Carbon low-sulfur carbon fibre graphite, there is wear-resisting, high temperature resistant and anti-stick function.Gland 19 is provided with the outer face of sealing ring 18, is filled out
Expect that gland 19 is fastened with body 1 by studs and hex nut.
Meanwhile second is provided with mounting groove formed with mounting groove between the valve rod 10 and the outer face of gland 19
Rolling bearing 20, valve rod 10 are connected by the second rolling bearing 20 with gland 19；It is corresponding in the outer end of the second rolling bearing 20
Valve rod 10 be provided with jump ring 21.Jump ring 21 plays fixation, prevents the second rolling bearing 20 from producing axial movement.
When pump pump work when, operation handwheel 11 rotate clockwise, valve rod 10 promote link gear rotate, linkage
Mechanism is rotated by flat key band movable gear shaft, and gear shaft drives pressure ring rotation up and down respectively by screw thread up and down in opposite direction,
Upper press ring 6 and the lower in the vertical direction of pressure ring 7, while be subjected to displacement towards the relative direction drawn close, now, upper press ring 6 unclamps valve
The opening carbon fibre graphite covered in 1b, lower pressure ring 7 unclamp the opening carbon fibre graphite in valve body 1a, and valve is in opening.When to
In oil well during injection high temperature and high pressure steam, oil well pump is stopped, and operation handwheel 11 makees counterclockwise rotation, the He of upper press ring 6
The lower in the vertical direction of pressure ring 7, while be subjected to displacement towards the direction of relative separation, now, upper press ring 6 compresses opening in bonnet 1b
Mouth carbon fibre graphite, lower pressure ring 7 compress the opening carbon fibre graphite in valve body 1a, and valve is closed, and prevents high-temperature gas from spraying
Go out, if after injection high temperature and high pressure steam terminates, oil pump restarts the pumping operation of a new round, blowout prevention valve needs to be again turned on,
With allowing oil pump piston bar freedom and flexibility task again.
Embodiment provided above is better embodiment of the present utility model, is only used for convenient explanation the utility model, and
It is non-to make any formal limitation, any those of ordinary skill in the art to the utility model, if not departing from
In the range of the utility model carries technical characteristic, locally change or repair using made by the utility model disclosed technology content
The equivalent embodiment of decorations, and without departing from the technical characteristics of the utility model content, still fall within the utility model technical characteristic
In the range of.
Claims (8)
1. a kind of HTHP oil well oil pump blowout prevention valve, including body (1), it is characterised in that the body (1) is vertically
Provided with the first installation cavity (2), oil recovery sucker rod (3) is equipped with the first installation cavity (2), in the first installation cavity (2) up and down
Sealing structure (4) and lower sealing structure (5) are respectively equipped between both ends and oil recovery sucker rod (3), in upper and lower sealing structure
(5) movable sleeve is provided with upper press ring (6) and lower pressure ring (7) on oil recovery sucker rod (3) outer wall between, in upper and lower pressure ring (6,7)
Periphery is provided with gear shaft (8), and gear shaft (8) on the relative inwall of upper and lower pressure ring (6,7) with being respectively equipped with screw thread and lower spiral shell
Line, upper screw thread are threadedly coupled with upper press ring (6), and lower screw thread is threadedly coupled with lower pressure ring (7), when gear shaft (8) rotates, upper,
Lower pressure ring (6, the 7) direction of motion is opposite；
It is provided with and is mutually perpendicular to the first installation cavity (2) and mutual conduction in the horizontal direction on the body (1) of gear shaft (8) side
The second installation cavity (9), be movably set with valve rod (10) in the second installation cavity (9), valve rod (10) is located on the outside of body (1)
End is connected with operation handwheel (11), and valve rod (10), which is located between the end in body (1) and gear shaft (8), passes through link gear
Linkage.
A kind of 2. HTHP oil well oil pump blowout prevention valve according to claim 1, it is characterised in that first installation cavity
(2) upper end cooperatively forms annular mounting groove with oil recovery sucker rod (3)；The upper sealing structure (4) is sequentially laminated by some
The opening carbon fibre graphite being arranged in annular mounting groove is formed.
A kind of 3. HTHP oil well oil pump blowout prevention valve according to claim 1, it is characterised in that first installation cavity
(2) lower end cooperatively forms lower annular mounting groove with oil recovery sucker rod (3)；The lower sealing structure (5) is sequentially laminated by some
The opening carbon fibre graphite being arranged in lower annular mounting groove is formed.
A kind of 4. HTHP oil well oil pump blowout prevention valve according to claim 1, it is characterised in that the link gear by
The drive bevel gear (12) for the end that valve rod (10) is located in body (1) is arranged on by parallel key and is arranged on by parallel key
Formed on gear shaft (8) outer wall and with drive bevel gear (12) intermeshing driven wheel of differential (13).
A kind of 5. HTHP oil well oil pump blowout prevention valve according to claim 1, it is characterised in that the body (1) by
The valve body (1a) of mutual cooperation and bonnet (1b) composition for being arranged on valve body (1a) upper end；First installation cavity (2) is by setting
First step hole (2a) on valve body (1a) and be arranged on bonnet (1b) and be engaged with first step hole (2a) second
Stepped hole (2b) is formed；The upper sealing structure (4) is located at second step hole (2b) inner top, lower sealing structure (5) position
In first step hole (2a) inner bottom part；It is respectively equipped with bonnet (1b) lower surface and valve body (1a) corresponding with gear shaft (8)
Annular mounting groove, be formed separately and the one-to-one mounting ring of annular mounting groove at the both ends of gear shaft (8) vertically
(8a), the sliding bearing (14) being connected with each mounting ring (8a) is provided with each annular mounting groove.
A kind of 6. HTHP oil well oil pump blowout prevention valve according to claim 5, it is characterised in that the valve body (1a) with
The graphite wound gasket piece (15) of annular is provided between the contact site of bonnet (1b).
A kind of 7. HTHP oil well oil pump blowout prevention valve according to claim 1 or 4, it is characterised in that the valve rod
(10) locating ring (16) is provided with the second installation cavity (9) corresponding to, is provided with the second installation cavity (9) on the inside of locating ring (16)
First rolling bearing (17), the first rolling bearing (17) are folded in locating ring (16) between link gear；In locating ring (16)
Some sealing rings (18) have sequentially been stacked in second installation cavity (9) in outside, filler is provided with sealing ring (18) outer face
Gland (19), gland (19) are fastened with body (1) by studs and hex nut.
A kind of 8. HTHP oil well oil pump blowout prevention valve according to claim 7, it is characterised in that the valve rod (10) with
Formed with mounting groove between gland (19) outer face, the second rolling bearing (20) is provided with mounting groove, valve rod (10) is logical
The second rolling bearing (20) is crossed to be connected with gland (19)；Set corresponding to second rolling bearing (20) outer end on valve rod (10)
There is jump ring (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720901258.8U CN206987779U (en) | 2017-07-24 | 2017-07-24 | A kind of HTHP oil well oil pump blowout prevention valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720901258.8U CN206987779U (en) | 2017-07-24 | 2017-07-24 | A kind of HTHP oil well oil pump blowout prevention valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206987779U true CN206987779U (en) | 2018-02-09 |
Family
ID=61416648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720901258.8U Withdrawn - After Issue CN206987779U (en) | 2017-07-24 | 2017-07-24 | A kind of HTHP oil well oil pump blowout prevention valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206987779U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237611A (en) * | 2017-07-24 | 2017-10-10 | 广东明珠流体机械有限公司 | HTHP oil well oil pump blowout prevention valve |
-
2017
- 2017-07-24 CN CN201720901258.8U patent/CN206987779U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237611A (en) * | 2017-07-24 | 2017-10-10 | 广东明珠流体机械有限公司 | HTHP oil well oil pump blowout prevention valve |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180209 Effective date of abandoning: 20230609 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180209 Effective date of abandoning: 20230609 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |