CN202249887U - Cable-through type thermal recovery wellhead device for electric submersible pump - Google Patents
Cable-through type thermal recovery wellhead device for electric submersible pump Download PDFInfo
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- CN202249887U CN202249887U CN2011202846100U CN201120284610U CN202249887U CN 202249887 U CN202249887 U CN 202249887U CN 2011202846100 U CN2011202846100 U CN 2011202846100U CN 201120284610 U CN201120284610 U CN 201120284610U CN 202249887 U CN202249887 U CN 202249887U
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- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 210000002445 nipple Anatomy 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000007789 sealing Methods 0.000 abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009530 blood pressure measurement Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 4
- 238000005086 pumping Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- -1 explosion-proof Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229940074869 marquis Drugs 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The cable penetrating type thermal recovery wellhead device for electric submersible pump is applied to the thermal recovery well of thick oil in oil field and adopts electric submersible pump to pump oil for production. The upper end of the sleeve flange short section is connected with a large four-way, and the large four-way is connected with a sleeve gate valve; the upper end of the large four-way is connected with a through flange, an axial hole is formed in a cylinder body penetrating through the flange, and the lower end of the axial hole is connected with an oil pipe hanging short section; the upper end connecting pipe of the axial hole is connected with a gate valve, a tee joint and a production gate valve through a flange; a cable through hole is formed in the cylinder which penetrates through the flange; a capillary tube through hole is formed in the cylinder penetrating through the flange, and a capillary tube sealing penetrator is fixed on the capillary tube through hole. The effect is as follows: three channels are arranged on one penetrating flange, so that oil extraction production can be performed, a power supply is provided for an underground electric submersible pump, a capillary tube can penetrate through the flange, and nitrogen is injected into the capillary tube for pressure measurement; and the thermocouple tube can penetrate through the hole to measure the temperature in the well.
Description
Technical field
The utility model relates to oil well mouth device, and particularly a kind of wellhead assembly of thick oil thermal extraction is a kind of wellhead assembly that adopts steam injection and adopt the electric submersible pump oil pumping to produce.
Background technology
Electric submersible pumping is often adopted in the oil field, when adopting electric submersible pumping, need cable be transported to the down-hole from ground, and for electric submersible pump provides electric energy, cable must pass through wellhead assembly.At present; Adopt the wellhead assembly structure of electric submersible pumping, mainly by casing flange pipe nipple, big four, pass through cable, cable and pass through sealer, threeway, production gate valve, slide valve, oil pipe hanging pup joint, pass through flange, sleeve pipe gate valve and pipe hanger pipe nipple and form.
At present, the electric submersible pumping wellhead assembly that use in the oil field satisfies the requirement of on-the-spot normal temperature electric submersible pump oil pumping technology, but in application, has some inconveniences:
1, the sealing that is connected of Seal of Cables and lifting sub all adopts a plurality of sealing rings to realize sealing through pressing plate, gland and screw (bolt studding), and structure is complicated, and leakage points is many, and is under viscous crude high temperature exploitation state, not too suitable;
2, the structure design of passing through design and lifting sub etc. of cable makes a whole set of electric submersible pumping wellhead assembly in operations such as well workover, and operation sequence is many, inconvenience;
3, the design of a whole set of wellhead assembly is not considered dynamic monitoring is carried out in down-hole electric submersible pump production, and it is dynamic to grasp the down-hole temperature and pressure, is beneficial to optimize electric submersible pump production run parameter.
The Chinese patent publication number is: 2528924, a kind of " electric submersible pumping well wellhead assembly " is provided.The cable of electric submersible pump power supply integral body from the adapter flange of production tree passes, and adopts whole packing_seal at the cable outlet place, has changed three holes of present electric submersible pump well head cable on oil pipe hanging pup joint, production tree adapter flange to pass separately.The production tree of electric submersible pumping well wellhead assembly is identical with flowing well, after the adapter flange cable outlet of production tree is blocked with plug, can in flowing well, use, and its voltage withstand class is consistent with electric submersible pump well head device body voltage withstand class.
The Chinese patent publication number is: 201699356, a kind of " a kind of cable passes through device " is provided.Comprise main body and angle plug, main body comprises body shell and main body conducting rod, and the body shell inwall is provided with a plurality of grooves, is provided with the main body conducting rod in the middle of the main body, and the main body conducting rod is provided with a plurality of grooves.This cable passes through device and is installed in the wellhead assembly of ground, and cable passes through device can bear the high pressure in the well, Gao Jingwen; High voltage (reaching as high as 5000V), big electric current, and have anti-marquis, fire-retardant, explosion-proof, oil resistant, water, anti-CO
2, H
2The function of corrosive gas such as S has also adopted rubber to make the hermetically-sealed construction of " Y " shape groove, has improved power cable effectively from sealing performance and reliability that well head passes through, has prevented the leakage of corrosivity and pernicious gas.
The utility model content
The purpose of the utility model is: provide a kind of electric submersible pump to pass through the formula thermal recovery well head device with cable, satisfy oil field high temperature electric submersible pump production Technology requirement; And solve downhole temperature, pressure test is capillaceous passes through and seal, and realizes down-hole temperature and pressure test.
The technical scheme that the utility model adopts is: electric submersible pump passes through the formula thermal recovery well head device with cable; Mainly by casing flange pipe nipple, big four, pass through flange, cable seal and pass through device, slide valve, threeway, production gate valve, capillary seal and pass through device, oil pipe hanging pup joint and sleeve pipe gate valve and form; It is characterized in that: the casing flange pipe nipple is in the upper end of cylindrical pipe flange to be arranged; There is casing threads lower end in cylindrical pipe, and the lower end can be connected with oil well casing.Upper end at the casing flange pipe nipple connects big four through flange, connects a sleeve pipe gate valve in the both sides of big four respectively through flange; Connect one in the upper end of big four through flange and pass through flange; Pass through the flange middle part and be cylinder; Have and the big four flange connecting in the lower end of passing through flange, an axial hole is arranged passing through on the cylinder of flange, the distance of the center line of axial hole and cylinder center line is between 50～55mm in X axle negative direction; Y direction is 0mm, and an oil pipe hanging pup joint has been threaded in the lower end of axial hole; There is tube connector upper end at axial hole, tube connector center line and axial hole center line on same straight line, tube connector with pass through the flange cylinder and link together, connect a slide valve in the upper end of tube connector through flange; Another of slide valve connects a threeway, and the vertical port of threeway is connected with one through flange and produces gate valve, and the upper port of threeway is fixed with blind flange.There is an axial cable to pass through the hole on the cylinder of flange passing through; It is circular port that axial cable passes through the hole; Cable passes through the distance of center line and cylinder center line in hole at X axle positive direction 63～68mm; Between Y axle positive direction 18～22mm, fixing cable passes through device in cable passes through the hole, and the cable of three cores can pass through device from cable and pass power delivery to the down-hole.There is an axial capillary tube to pass through the hole on the cylinder of flange passing through; Axial capillary tube passes through the distance of center line and cylinder center line in hole at X axle positive direction 28～32mm; Between Y axle negative direction 62～68mm, there is screw thread the upper end of passing through the hole at capillary tube, and capillary seal passes through device and is fixed on capillary tube through screw thread and passes through on the hole; Capillary energy passes through device from capillary seal and passes, and will be delivered to ground to the pressure of down-hole.
Described axial hole, cable pass through hole and capillary tube and pass through the hole and be triangularly arranged.
Described capillary seal passes through device and comprises main body, gasket ring, V-type packing, pressure ring, hex bolts and locking nut; There is external screw thread the lower end of cylindrical main body, can be fixed on the upper end that capillary tube passes through the hole; Six sides outside the upper end of main body has, the hand-screw that can re-pack is tight.Two parallel shoulder holes are arranged in main body; Gasket ring, V-type packing, pressure ring are arranged in the macropore of shoulder hole top from bottom to up, at shoulder hole internal thread is arranged, hollow hex bolts is fixed in the shoulder hole; The lower end of hex bolts is pressed on the pressure ring, and a locking nut is arranged on hex bolts.Capillary energy passes shoulder hole bottom aperture, gasket ring centre bore, V-type packing centre bore, pressure ring centre bore and hex bolts centre bore.The hex bolts of screwing can compress the V-type packing and play sealing effect capillaceous.
Described cable passes through device and comprises that lower nut, O RunddichtringO, cable pass through device housing and top nut; It is cylindric that cable passes through the device housing, and the main body outer wall two ends of passing through the device housing at cable have annular seal groove respectively, and the O RunddichtringO is arranged in annular seal groove; Pass through the two ends external screw thread of device housing at cable; The upper end screw thread is connected with top nut, and the lower end screw thread is connected with lower nut, and cable passes through device and is inserted into cable and passes through in the hole; The O RunddichtringO plays sealing function, and top nut and lower nut are separately fixed on the cylinder upper and lower end face of passing through flange 3.
The beneficial effect of the utility model: the utility model electric submersible pump passes through the formula thermal recovery well head device with cable, passes through at one and is provided with three passages on the flange, and promptly being provided with recovers the oil produces passage, the production of recovering the oil; Also have the cable passage lanes in addition, can power supply be provided for the down-hole electric submersible pump; Also having in the capillary tube passage lanes has capillary seal to pass through device, and capillary seal passes through device can make a capillary tube pass through, and carries out the pressure measurement of capillary tube nitrogen injection; Capillary seal passes through device thermocouple well is passed through in addition, through thermocouple well can radial well under thermometric.Realize detecting when electric submersible pumping is produced downhole temperature, pressure.
Simple in structure, sealing and is connected has reliably reduced cost of production, and the minimizing operation procedure has reduced the sealing leakage points again.
Description of drawings
Fig. 1 is that the utility model electric submersible pump passes through formula thermal recovery well head device structural representation with cable.
Fig. 2 is the structural profile sketch map that capillary seal passes through device 9.
Fig. 3 is the structural representation that cable passes through device 4.
Fig. 4 is the A-A sectional drawing of Fig. 3.
Fig. 5 is the generalized section of passing through flange 3.
Fig. 6 is the B-B sectional drawing of Fig. 5.Expression axial hole, cable pass through hole and capillary tube and pass through the hole and be triangularly arranged.
Fig. 7 is the C-C sectional drawing of Fig. 6.The expression capillary seal passes through the fixed structure of device 9.
Among the figure, 1-casing flange pipe nipple, the 2-big four, 3-passes through flange, and the 4-cable passes through device, the 5-cable, the 6-slide valve, the 7-threeway, 8-produces gate valve, and the 9-capillary seal passes through device, 10-capillary tube, 11-oil pipe hanging pup joint, 12-sleeve pipe gate valve.The 41-lower nut, the 42-O RunddichtringO, the 43-cable passes through the device housing, 44-cable, 45-top nut.The 91-main body, 92-gasket ring, 93-V type packing, 94-pressure ring, 95-hex bolts, 96-locking nut.
The specific embodiment
Embodiment 1: use cable to pass through the formula thermal recovery well head device with an electric submersible pump and be example, the utility model is done further explain.Electric submersible pump passes through the about 2190mm of formula thermal recovery well head device height overall with cable.
Consult Fig. 1.Electric submersible pump passes through the formula thermal recovery well head device with cable, mainly by casing flange pipe nipple 1, big four 2, pass through that flange 3, cable seal pass through device 4, slide valve 6, threeway 7, produce gate valve 8, capillary seal passes through device 9, oil pipe hanging pup joint 11 and sleeve pipe gate valve 12 and forms.
Casing flange pipe nipple 1 is in the upper end of cylindrical pipe flange to be arranged, and 95/8BCSG (sleeve pipe of external diameter 244.5mm) casing threads is arranged in the lower end of cylindrical pipe, and the lower end can be connected with oil well 95/8BCSG (sleeve pipe of external diameter 244.5mm) sleeve pipe.Upper end at casing flange pipe nipple 1 connects big four 2 through flange, connects a sleeve pipe gate valve 12 in the both sides of big four 2 respectively through flange.Connect one in the upper end of big four 2 through flange and pass through flange 3; Passing through flange 3 middle parts is cylinder; Have and big four 2 flange connecting in the lower end of passing through flange 3, the axial hole of a diameter 65mm is arranged on the cylinder that passes through flange 3, the distance of the center line of axial hole and cylinder center line is 52mm in X axle negative direction; Y direction is 0mm, and an oil pipe hanging pup joint 11 has been threaded in the lower end of axial hole.There is tube connector upper end at axial hole, tube connector center line and axial hole center line on same straight line, tube connector with pass through flange 3 cylinders and link together, connect a slide valve 6 in the upper end of tube connector through flange.Another of slide valve 6 connects a threeway 7, and the vertical port of threeway 7 is connected with one through flange and produces gate valve 8, and the upper port of threeway 7 is fixed with blind flange.
On the cylinder that passes through flange 3, there is an axial cable to pass through the hole; It is circular port that axial cable passes through the hole; Cable passes through the distance of center line and cylinder center line in hole at X axle positive direction 66mm; Y axle positive direction 20mm, the cable 4 that a fixing cable passes through device 4, three cores in cable passes through the hole can pass through device 4 from cable and pass power delivery to the down-hole.
On the cylinder that passes through flange 3, have an axial capillary tube to pass through the hole, axial capillary tube passes through the distance of center line and cylinder center line in hole at X axle positive direction 30mm, Y axle negative direction 65mm, and there is screw thread the upper end of passing through the hole at capillary tube.Consult Fig. 7.Capillary seal passes through device 9 and is fixed on capillary tube through screw thread and passes through on the hole, and capillary tube 10 can pass through device 9 from capillary seal and pass, and will be delivered to ground to the pressure of down-hole.
Consult Fig. 6.Described axial hole, cable pass through hole and capillary tube and pass through the hole and be triangularly arranged.Pass through the cylinder cross section of flange 3, through the cylinder center line and on the cross section, make two mutual vertical center lines, one is the Y axle, and one is the X axle.The external diameter 470mm of cylinder lower flange, middle part cylinder external diameter 298.5mm.On cylinder, have three through holes, the axial hole of one of them internal diameter 65mm is for producing passage.It is 63.5mm that cable passes through the hole internal diameter.It is 52mm that capillary tube passes through the hole internal diameter.
Consult Fig. 2.Described capillary seal passes through device 9 and comprises main body 91, gasket ring 92, V-type packing 93, pressure ring 94, hex bolts 95 and locking nut 96.There is the 23/8TBG oil tube external thread lower end of the cylindrical main body 91 of upper end external diameter 70mm, middle part external diameter 60.3mm, can be fixed on the upper end that capillary tube passes through the hole; Six sides outside the upper end of main body 91 has, the hand-screw that can re-pack is tight.Two parallel shoulder holes are arranged in main body 91; In the 14mm macropore of shoulder hole top; Gasket ring 92, V-type packing 93, pressure ring 94 are arranged from bottom to up, at shoulder hole internal thread is arranged, hollow hex bolts 95 is fixed in the shoulder hole; The lower end of hex bolts 95 is pressed on the pressure ring 94, and a locking nut 96 is arranged on hex bolts 95.Capillary energy passes shoulder hole bottom aperture, gasket ring 92 centre bores, V-type packing 93 centre bores, pressure ring 94 centre bores and hex bolts 95 centre bores.The hex bolts 95 of screwing can compress V-type packing 93 and play sealing effect capillaceous.
Consult Fig. 2.Described cable passes through device 4 and comprises that lower nut 41, O RunddichtringO 42, cable pass through device housing 43 and top nut 45.It is cylindric for 63.5mm that cable passes through device housing 43; The main body outer wall two ends of passing through device housing 43 at cable have annular seal groove respectively; O RunddichtringO 42 is arranged in annular seal groove; Pass through the two ends external screw thread of device housing 43 at cable, the upper end screw thread is connected with top nut 45, and the lower end screw thread is connected with lower nut 41.Consult Fig. 5.Cable passes through device 4 and is inserted into cable and passes through in the hole, and O RunddichtringO 42 plays sealing function, and top nut 45 is separately fixed on the cylinder upper and lower end face of passing through flange 3 with lower nut 41.
Claims (4)
1. an electric submersible pump passes through the formula thermal recovery well head device with cable; Mainly by casing flange pipe nipple (1), big four (2), pass through that flange (3), cable seal pass through device (4), slide valve (6), threeway (7), produce gate valve (8), capillary seal passes through device (9), oil pipe hanging pup joint (11) and sleeve pipe gate valve (12) and forms; It is characterized in that: casing flange pipe nipple (1) is in the upper end of cylindrical pipe flange to be arranged, and in the lower end of cylindrical pipe casing threads is arranged; Upper end at casing flange pipe nipple (1) connects big four (2) through flange, connects a sleeve pipe gate valve (12) in the both sides of big four (2) respectively through flange; Connect one in the upper end of big four (2) through flange and pass through flange (3); Pass through flange (3) middle part and be cylinder; Have and big four (2) flange connecting in the lower end of passing through flange (3), an axial hole is arranged on the cylinder that passes through flange (3), the distance of the center line of axial hole and cylinder center line is between 50～55mm in X axle negative direction; Y direction is 0mm, and an oil pipe hanging pup joint (11) has been threaded in the lower end of axial hole; There is tube connector upper end at axial hole, tube connector center line and axial hole center line on same straight line, tube connector with pass through flange (3) cylinder and link together, connect a slide valve (6) in the upper end of tube connector through flange; Another of slide valve (6) connects a threeway (7), and the vertical port of threeway (7) is connected with one through flange and produces gate valve (8), and the upper port of threeway (7) is fixed with blind flange; On the cylinder that passes through flange (3), there is an axial cable to pass through the hole; It is circular port that axial cable passes through the hole; Cable passes through the distance of center line and cylinder center line in hole at X axle positive direction 63～68mm; Between Y axle positive direction 18～22mm, fixing cable passes through device (4) in cable passes through the hole; On the cylinder that passes through flange (3), there is an axial capillary tube to pass through the hole; Axial capillary tube passes through the distance of center line and cylinder center line in hole at X axle positive direction 28～32mm; Between Y axle negative direction 62～68mm; There is screw thread the upper end of passing through the hole at capillary tube, and capillary seal passes through device (9) and is fixed on capillary tube through screw thread and passes through on the hole.
2. electric submersible pump according to claim 1 passes through the formula thermal recovery well head device with cable, it is characterized in that: described axial hole, cable pass through hole and capillary tube and pass through the hole and be triangularly arranged.
3. electric submersible pump according to claim 1 and 2 passes through the formula thermal recovery well head device with cable, it is characterized in that: described capillary seal passes through device (9) and comprises main body (91), gasket ring (92), V-type packing (93), pressure ring (94), hex bolts (95) and locking nut (96); There is external screw thread the lower end of cylindrical main body (91); Six sides outside the upper end of main body (91) has; Two parallel shoulder holes are arranged in main body (91); Gasket ring (92), V-type packing (93), pressure ring (94) are arranged in the macropore of shoulder hole top from bottom to up; At shoulder hole internal thread is arranged; Hollow hex bolts (95) is fixed in the shoulder hole, and the lower end of hex bolts (95) is pressed on the pressure ring (94), and a locking nut (96) is arranged on hex bolts (95).
4. electric submersible pump according to claim 1 and 2 passes through the formula thermal recovery well head device with cable, it is characterized in that: described cable passes through device (4) and comprises that lower nut (41), O RunddichtringO (42), cable pass through device housing (43) and top nut (4) 5; Cable passes through device housing (43) for cylindric; The main body outer wall two ends of passing through device housing (43) at cable have annular seal groove respectively, and O RunddichtringO (42) is arranged in annular seal groove, pass through the two ends external screw thread of device housing (43) at cable; The upper end screw thread is connected with top nut (45); The lower end screw thread is connected with lower nut (41), and cable passes through device (4) and is inserted into cable and passes through in the hole, and top nut (45) and lower nut (41) are separately fixed on the cylinder upper and lower end face of passing through flange (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202846100U CN202249887U (en) | 2011-08-05 | 2011-08-05 | Cable-through type thermal recovery wellhead device for electric submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202846100U CN202249887U (en) | 2011-08-05 | 2011-08-05 | Cable-through type thermal recovery wellhead device for electric submersible pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249887U true CN202249887U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202846100U Expired - Lifetime CN202249887U (en) | 2011-08-05 | 2011-08-05 | Cable-through type thermal recovery wellhead device for electric submersible pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249887U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268971A (en) * | 2011-08-05 | 2011-12-07 | 中国石油天然气股份有限公司 | Cable-through type thermal recovery wellhead device for electric submersible pump |
| CN103050912A (en) * | 2012-12-07 | 2013-04-17 | 重庆昌瑞电器制造有限公司 | Wellhead cable penetration device with upper part capable of universally turning |
| CN109488244A (en) * | 2018-11-02 | 2019-03-19 | 河北通运石油机械有限公司 | A kind of anti-channeling multifunctional compensating thermal production well mouth |
| CN113107865A (en) * | 2021-04-18 | 2021-07-13 | 深圳景嘉机电科技有限公司 | Multifunctional submersible pump ground control device |
-
2011
- 2011-08-05 CN CN2011202846100U patent/CN202249887U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268971A (en) * | 2011-08-05 | 2011-12-07 | 中国石油天然气股份有限公司 | Cable-through type thermal recovery wellhead device for electric submersible pump |
| CN102268971B (en) * | 2011-08-05 | 2013-07-31 | 中国石油天然气股份有限公司 | Cable-through type thermal recovery wellhead device for electric submersible pump |
| CN103050912A (en) * | 2012-12-07 | 2013-04-17 | 重庆昌瑞电器制造有限公司 | Wellhead cable penetration device with upper part capable of universally turning |
| CN103050912B (en) * | 2012-12-07 | 2016-06-08 | 重庆昌瑞电器制造有限公司 | The wellhead cable penetrating device of the top universal turning of energy |
| CN109488244A (en) * | 2018-11-02 | 2019-03-19 | 河北通运石油机械有限公司 | A kind of anti-channeling multifunctional compensating thermal production well mouth |
| CN113107865A (en) * | 2021-04-18 | 2021-07-13 | 深圳景嘉机电科技有限公司 | Multifunctional submersible pump ground control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130731 |
|
| RGAV | Abandon patent right to avoid regrant |