CN104727777B - Temperature control type hydraulic packer - Google Patents
Temperature control type hydraulic packer Download PDFInfo
- Publication number
- CN104727777B CN104727777B CN201510156899.0A CN201510156899A CN104727777B CN 104727777 B CN104727777 B CN 104727777B CN 201510156899 A CN201510156899 A CN 201510156899A CN 104727777 B CN104727777 B CN 104727777B
- Authority
- CN
- China
- Prior art keywords
- inner tube
- fixed mechanism
- hydraulic cylinder
- snap ring
- ring
- 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
- 238000012856 packing Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 229910000743 fusible alloy Inorganic materials 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010793 Steam injection (oil industry) Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
Abstract
A kind of temperature control type hydraulic packer，Lower fixed mechanism is installed in the bottom of inner tube，There is unidirectional outer clasp in inner tube，Packing element is set with inner pipe，The lower seat of packing element is on lower fixed mechanism，One-way locking mechanism is placed on the top of packing element，There is the inner lock buckle matched with unidirectional outer clasp on the inwall of the in-house lock ring of one-way locking，Fixed mechanism is installed in the middle and upper part of inner tube，Hydraulic cylinder is sleeved on downwards inner tube from the top of inner tube、Outside upper fixed mechanism，It is temperature control hanging ring between hydraulic cylinder and inner tube，Hydraulic cylinder is made to hang on inner pipe，Temperature control hanging ring is low-melting alloy，Inner tube、Hydraulic cylinder、Cavity is formed between upper fixed mechanism，There is upper sealing ring between inner tube and hydraulic cylinder，There is outer side seal circle between hydraulic cylinder and upper fixed mechanism，There is inner seal circle between upper fixed mechanism and inner tube，Upper sealing ring、Outer side seal circle、Inner seal circle makes cavity become closed chamber，The bottom of hydraulic cylinder is connected with one-way locking mechanism，One-way locking mechanism is made to move with hydraulic cylinder.
Description
Technical field
The invention belongs to the water-tight equipment of oil field oil-field thick-oil thermal production well, is a kind of temperature control type hydraulic packer.
Background technology
For steam injection recovery after heavy crude reservoir sieve tube completion, enter the packer of the outer layering of pipe under needing in the well.Mesh
Front external packer of pipe complex structure, parts are many, and poor reliability, service life are short, oil well production cycle is short, and need ground
Suppressing could be setting, the bottom of packer to also configure can closed tubing string instrument, it is open-minded that this set instrument also needs to the later stage, thus
Operational procedure is many, and completion period is long.
Content of the invention
The purpose of the present invention is for the deficiencies in the prior art, designs a kind of temperature control type hydraulic packer, using steam injection
High temperature and pressure during oil recovery is setting, improves the production cycle of thick oil thermal extraction, reduces operational procedure.
The object of the present invention is achieved like this：Including inner tube, hydraulic cylinder, temperature control hanging ring, upper sealing ring, upper fixing machine
Structure, outer side seal circle, inner seal circle, one-way locking mechanism, packing element, lower fixed mechanism, lower fixed mechanism is installed in inner tube
Bottom, lower fixed mechanism can not move axially on inner pipe, have unidirectional outer clasp in inner tube, and packing element is set with inner pipe, packing element
Lower seat on lower fixed mechanism, one-way locking mechanism, the inwall of the in-house lock ring of one-way locking are placed in the top of packing element
On have the inner lock buckle matched with unidirectional outer clasp, the middle and upper part of inner tube installs fixed mechanism, and upper fixed mechanism is on inner pipe not
Can axial movement, upper fixed mechanism on the one-way locking mechanism, hydraulic cylinder from the top of inner tube be sleeved on downwards inner tube, on
Outside fixed mechanism, it is temperature control hanging ring between hydraulic cylinder and inner tube, so that hydraulic cylinder is hung on inner pipe, temperature control hanging ring is eutectic
Point alloy, forms cavity between inner tube, hydraulic cylinder, upper fixed mechanism, has upper sealing ring between inner tube and hydraulic cylinder, hydraulic cylinder with
There is outer side seal circle between upper fixed mechanism, between upper fixed mechanism and inner tube, have inner seal circle, upper sealing ring, outer side seal
Circle, inner seal circle make cavity become closed chamber, and the bottom of hydraulic cylinder is connected with one-way locking mechanism, makes one-way locking mechanism
Move with hydraulic cylinder.
UNICOM road is set on hydraulic cylinder, cavity and external communication is made, blocking is installed in described UNICOM road, make described
UNICOM road is blocked.
Lower fixed mechanism includes lower buckle closure, lower snap ring, lower bracket, and lower snap ring is semicircular ring, and the inner diameter of lower snap ring is little
In the external diameter of inner tube, lower snap ring is sticked in the groove of inner tube, after lower buckle closure is sleeved on outside lower snap ring, makes lower snap ring diametrically not
Can be displaced outwardly, lower buckle closure is fixed on inner pipe after being threadeded with lower bracket.
Upper fixed mechanism includes buckle closure, upper snap ring, upper bracket, and upper snap ring is semicircular ring, and the inner diameter of upper snap ring is little
In the external diameter of inner tube, upper snap ring is sticked in the groove of inner tube, after upper buckle closure is sleeved on outside snap ring, makes snap ring diametrically not
Can be displaced outwardly, upper buckle closure is fixed on inner pipe after being threadeded with upper bracket.
The invention has the beneficial effects as follows：Rear cavity is assembled integrally for airtight chamber, under in well after external pressure high, interior
Portion's pressure is low, and temperature control hanging ring is low-melting alloy, and during steam injection recovery, well temperature is higher than the fusing point of temperature control hanging ring, temperature
Control hanging ring fusing, hydraulic cylinder produce downward axial force under pressure, drive one-way locking mechanism to descending compression glue
Cylinder so as to which expansion becomes the big sealing borehole wall, hydraulic cylinder drive one-way locking mechanism to descending when the in-house lock ring of one-way locking
Unidirectional external lock buckle is gone downwards to, the inner lock buckle on the inwall of the in-house lock ring of one-way locking is buckled in the outer clasp in inner tube
Together, so that one-way locking mechanism is return, make packing element that expansion compressive state is permanently in, the present invention is using the pressure of itself in well
Power and temperature are realized setting, are not required to individually suppress before steam injection, thus simple structure, and functional reliability is high, can improve viscous crude
The production cycle of thermal production well, simultaneously because operational procedure is few, short construction period, with significant economic benefit.
Description of the drawings
Fig. 1 is the installation diagram of the embodiment of the present invention.
Fig. 2 is the structure chart of upper fixed mechanism.
Fig. 3 is the structure chart of lower fixed mechanism.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the present invention is illustrated.
As seen from the figure, embodiments of the invention include inner tube 1, hydraulic cylinder 2, temperature control hanging ring 3, upper sealing ring 4, upper fixation
Mechanism 7, outer side seal circle 8, inner seal circle 9, one-way locking mechanism 10, packing element 12, lower fixed mechanism 13, lower fixed mechanism 13
Installed in the bottom of inner tube 1, lower fixed mechanism 13 can not be moved axially in inner tube 1, have unidirectional outer clasp 11, glue in inner tube 1
Cylinder 12 is sleeved in inner tube 1, and on lower fixed mechanism 13, one-way locking mechanism is placed on the top of packing element 12 to the lower seat of packing element 12
10, there is the inner lock buckle matched with unidirectional outer clasp 11 on the inwall of the lock ring in one-way locking mechanism 10,（This structure and oil field
One-way mechanism on the packers such as Y441, Y445 is identical, and those skilled in the art is very familiar with）The middle and upper part of inner tube 1 is installed
Upper fixed mechanism 7, upper fixed mechanism 7 can not be moved axially in inner tube 1, upper fixed mechanism 7 in one-way locking mechanism 10 it
On, hydraulic cylinder 2 is sleeved on outside inner tube 1, upper fixed mechanism 7 downwards from the top of inner tube 1, is temperature control between hydraulic cylinder 2 and inner tube 1
Hanging ring 3, makes hydraulic cylinder 2 be suspended in inner tube 1, and temperature control hanging ring 3 is low-melting alloy, and its fusing point is less than the temperature of injection steam
Degree, hydraulic cylinder 2 are corresponded on the position of temperature control hanging ring 3 and have duct, and temperature control hanging ring 3 is filled after being fused into liquid from this duct
Enter to position as shown in Figure 1, suspension force, shape between inner tube 1, hydraulic cylinder 2, upper fixed mechanism 7 are born in solidification after temperature drop
Become cavity 6, have upper sealing ring 4 between inner tube 1 and hydraulic cylinder 2, between hydraulic cylinder 2 and upper fixed mechanism 7, have outer side seal circle 8,
There is inner seal circle 9 between upper fixed mechanism 7 and inner tube 1, upper sealing ring 4, outer side seal circle 8, inner seal circle 9 make cavity 6
Become closed chamber, make hydraulic cylinder 2 the upper end area of high pressure be born more than lower end area, the bottom of hydraulic cylinder 2 and one-way locking
Mechanism 10 connects, and so that one-way locking mechanism 10 is moved with hydraulic cylinder 2.
UNICOM road is set on hydraulic cylinder 2, cavity 6 and external communication is made, blocking 5 is installed in described UNICOM road, makes institute
The UNICOM road that states is blocked, it is ensured that cavity 6 is in air-tight state.On hydraulic cylinder 2, UNICOM road is set, be for the ease of assembling,
When preventing from assembling, during the smaller volume of cavity 6, air is caused assembling difficult by compression.
Lower fixed mechanism 13 is for the formation strong point in inner tube 1, axial force is transferred in inner tube 1, lower fixing machine
Structure includes lower buckle closure 13-1, lower snap ring 13-2, lower bracket 13-3, and lower snap ring 13-2 is semicircular ring（Two pieces is installed）, lower card
The inner diameter of ring 13-2 is sticked in the groove of inner tube 1 less than the external diameter of inner tube 1, lower snap ring 13-2, lower buckle closure 13-1 suit
After lower snap ring 13-2 is outer, lower snap ring 13-2 is made diametrically to be displaced outwardly, lower buckle closure 13-1 and lower bracket 13-3
It is fixed in after threaded in inner tube 1, so that lower fixed mechanism 13 is moved axially on inner pipe.
Upper fixed mechanism 7 is for the formation strong point in inner tube 1, axial force is transferred in inner tube 1, upper fixed mechanism
7 include buckle closure 7-1, upper snap ring 7-2, upper bracket 7-3, and upper snap ring 7-2 is semicircular ring（Two pieces is installed）, upper snap ring 7-2
Inner diameter less than inner tube 1 external diameter, upper snap ring 7-2 sticked in the groove of inner tube 1, and upper buckle closure 7-1 is sleeved on snap ring
After 7-2 is outer, snap ring 7-2 is made diametrically to be displaced outwardly, upper buckle closure 7-1 will after threadeding with upper bracket 7-3
Which is fixed in inner tube 1.
Claims (4)
1. a kind of temperature control type hydraulic packer, including inner tube（1）, hydraulic cylinder（2）, temperature control hanging ring（3）, upper sealing ring（4）, on
Fixed mechanism（7）, outer side seal circle（8）, inner seal circle（9）, one-way locking mechanism（10）, packing element（12）, lower fixed mechanism
（13）, it is characterized in that：Lower fixed mechanism（13）Installed in inner tube（1）Bottom, lower fixed mechanism（13）In inner tube（1）On can not
Axial movement, inner tube（1）On have unidirectional outer clasp（11）, packing element（12）It is sleeved on inner tube（1）On, packing element（12）Lower seat exist
Lower fixed mechanism（13）On, packing element（12）Top place one-way locking mechanism（10）, one-way locking mechanism（10）Interior lock ring
Inwall on have and unidirectional outer clasp（11）The inner lock buckle of matching, inner tube（1）Middle and upper part install fixed mechanism（7）, upper solid
Determine mechanism（7）In inner tube（1）On can not move axially, upper fixed mechanism（7）In one-way locking mechanism（10）On, hydraulic cylinder
（2）From inner tube（1）Top be sleeved on downwards inner tube（1）, upper fixed mechanism（7）Outward, hydraulic cylinder（2）With inner tube（1）Between be
Temperature control hanging ring（3）, make hydraulic cylinder（2）It is suspended on inner tube（1）On, temperature control hanging ring（3）For low-melting alloy, inner tube（1）, liquid
Cylinder pressure（2）, upper fixed mechanism（7）Between formed cavity（6）, inner tube（1）With hydraulic cylinder（2）Between have upper sealing ring（4）, hydraulic pressure
Cylinder（2）With upper fixed mechanism（7）Between have outer side seal circle（8）, upper fixed mechanism（7）With inner tube（1）Between have inner seal
Circle（9）, upper sealing ring（4）, outer side seal circle（8）, inner seal circle（9）Make cavity（6）Become closed chamber, hydraulic cylinder（2）
Bottom and one-way locking mechanism（10）Connection, makes one-way locking mechanism（10）With hydraulic cylinder（2）Mobile.
2. temperature control type hydraulic packer according to claim 1, is characterized in that：Hydraulic cylinder（2）Upper setting UNICOM road, makes sky
Chamber（6）With external communication, blocking is installed in described UNICOM road（5）, blocked described UNICOM road.
3. temperature control type hydraulic packer according to claim 1, is characterized in that：Lower fixed mechanism includes lower buckle closure（13-
1）, lower snap ring（13-2）, lower bracket（13-3）, lower snap ring（13-2）For semicircular ring, lower snap ring（13-2）Inner diameter
Less than inner tube（1）External diameter, lower snap ring（13-2）Stick into inner tube（1）Groove in, lower buckle closure（13-1）It is sleeved on lower snap ring
（13-2）After outer, lower snap ring is made（13-2）Can not diametrically be displaced outwardly, lower buckle closure（13-1）With lower bracket（13-3）
Inner tube is fixed in after threaded（1）On.
4. the temperature control type hydraulic packer according to claim 1 or 3, is characterized in that：Upper fixed mechanism includes buckle closure
（7-1）, upper snap ring（7-2）, upper bracket（7-3）, upper snap ring（7-2）For semicircular ring, upper snap ring（7-2）Inner diameter
Less than inner tube（1）External diameter, upper snap ring（7-2）Stick into inner tube（1）Groove in, upper buckle closure（7-1）It is sleeved on snap ring
（7-2）After outer, snap ring is made（7-2）Can not diametrically be displaced outwardly, upper buckle closure（7-1）With upper bracket（7-3）Screw thread
Inner tube is fixed in after connection（1）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156899.0A CN104727777B (en) | 2015-04-04 | 2015-04-04 | Temperature control type hydraulic packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510156899.0A CN104727777B (en) | 2015-04-04 | 2015-04-04 | Temperature control type hydraulic packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104727777A CN104727777A (en) | 2015-06-24 |
| CN104727777B true CN104727777B (en) | 2017-03-08 |
Family
ID=53452118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156899.0A Active CN104727777B (en) | 2015-04-04 | 2015-04-04 | Temperature control type hydraulic packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104727777B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522907B (en) * | 2015-09-15 | 2019-04-05 | 中国石油化工股份有限公司 | Salvageable thermal recovery well casing string and its application method |
| CN106522871B (en) * | 2015-09-15 | 2019-04-05 | 中国石油化工股份有限公司 | A kind of open hole packer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204552680U (en) * | 2015-04-04 | 2015-08-12 | 东营百华石油技术开发有限公司 | Temperature control type hydraulic packer |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1111710A (en) * | 1994-05-16 | 1995-11-15 | 唐山龙加电子技术开发有限公司 | Packer for C and WK |
| ATE476252T1 (en) * | 2007-05-30 | 2010-08-15 | Iie Ges Fuer Innovative Indust | DEVICE FOR POLYMERIZATION |
| US20090255691A1 (en) * | 2008-04-10 | 2009-10-15 | Baker Hughes Incorporated | Permanent packer using a slurry inflation medium |
| CN201756937U (en) * | 2010-07-07 | 2011-03-09 | 沈阳新蓝天科技实业有限公司 | Oil well thermal recovery packer |
| CN102337856A (en) * | 2010-07-16 | 2012-02-01 | 张学锋 | Novel thermally-expanded extrusion packer for viscous oil steam-injection well |
| CN201924871U (en) * | 2011-02-18 | 2011-08-10 | 东营百华石油技术开发有限公司 | Heat-sensitive packer of steam injection well |
| US9140094B2 (en) * | 2011-02-24 | 2015-09-22 | Baker Hughes Incorporated | Open hole expandable packer with extended reach feature |
| US8720561B2 (en) * | 2011-04-12 | 2014-05-13 | Saudi Arabian Oil Company | Sliding stage cementing tool and method |
| WO2013062566A1 (en) * | 2011-10-28 | 2013-05-02 | Halliburton Energy Services, Inc. | Downhole packer assembly having a selective fluid bypass and method for use thereof |
| CN102865050B (en) * | 2012-09-25 | 2015-12-09 | 成都理工大学 | The automatic packer of a kind of permanent type prestressing force temperature-sensitive |
| CN203296743U (en) * | 2013-06-20 | 2013-11-20 | 盘锦市兴隆台区欢喜福利综合厂 | Double-acting temperature-sensitive steam injection packer |
| CN204113198U (en) * | 2014-07-16 | 2015-01-21 | 中国石油天然气股份有限公司 | Temperature control heat washes anti-pollution packer |
-
2015
- 2015-04-04 CN CN201510156899.0A patent/CN104727777B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204552680U (en) * | 2015-04-04 | 2015-08-12 | 东营百华石油技术开发有限公司 | Temperature control type hydraulic packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104727777A (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101737019B (en) | Release packer capable of well-flushing | |
| CN201354617Y (en) | Self-expanding packer | |
| CN201363112Y (en) | Well cleaning and inflating integrated device used for screen tube sublevel well completion | |
| CN107532466A (en) | Annular barrier with expansion cell | |
| CN101906945A (en) | Hydraulic expansion hanger for expandable screen pipes | |
| CN104727777B (en) | Temperature control type hydraulic packer | |
| CN2839555Y (en) | Releasing gadget packer | |
| CN103775022B (en) | Can the Multifunction packer of low pressure restting after a kind of high pressure first sets | |
| CN103388469B (en) | Packing tool | |
| CN203383783U (en) | Closed-type bottom reversing switch | |
| CN203584365U (en) | Retrievable integral ash squeezing bridge plug | |
| CN201778759U (en) | Underground tubing-casing annulus pressure-reducing device | |
| CN204552680U (en) | Temperature control type hydraulic packer | |
| CN201391255Y (en) | Continuous sand washing device for oil wells and water wells | |
| CN2861470Y (en) | Airtight power expansion packer | |
| CN203742530U (en) | Suspension packer | |
| CN201650203U (en) | Double rubber-barrel isolation packer | |
| CN203716920U (en) | Multifunctional packer with capacity of low-pressure repeated setting after first high-pressure setting | |
| CN203584361U (en) | Multifunctional well packer | |
| CN202000956U (en) | External casing packer | |
| CN204804767U (en) | Can throw formula of dragging for high -pressure gas injection valve | |
| CN204344060U (en) | The packer that fluid pressure type can repeatedly set | |
| CN201401152Y (en) | Double-packing-element releasing packer | |
| CN209603930U (en) | Without pipe oil recovery sealer | |
| CN201314217Y (en) | Release packer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shang Juntao Inventor after: Zhang Wenbo Inventor after: Zhang Jian Inventor after: Zhang Kun Inventor after: Pang Mingyu Inventor after: Wang Shuhan Inventor after: Sun Hangjun Inventor after: Li Tao Inventor after: Xu Juan Inventor after: Cheng Weihai Inventor after: Ma Huzi Inventor after: Wang Shichao Inventor before: Shang Juntao Inventor before: Zhang Wenbo Inventor before: Pang Mingyu Inventor before: Wang Shuhan Inventor before: Sun Hangjun Inventor before: Li Tao Inventor before: Xu Juan Inventor before: Cheng Weihai Inventor before: Ma Huzi Inventor before: Wang Shichao |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Temperature-control type hydraulic packer Effective date of registration: 20170811 Granted publication date: 20170308 Pledgee: China Co. truction Bank Corp Dongying Shengda subbranch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: 2017990000739 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200630 Granted publication date: 20170308 Pledgee: China Co. truction Bank Corp Dongying Shengda subbranch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: 2017990000739 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Temperature-control type hydraulic packer Effective date of registration: 20200630 Granted publication date: 20170308 Pledgee: Dongying rural commercial bank Limited by Share Ltd. West City Branch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2020980003663 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211223 Granted publication date: 20170308 Pledgee: Dongying rural commercial bank Limited by Share Ltd. West City Branch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2020980003663 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Temperature controlled hydraulic packer Effective date of registration: 20211229 Granted publication date: 20170308 Pledgee: Dongying rural commercial bank Limited by Share Ltd. West City Branch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2021980016908 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230116 Granted publication date: 20170308 Pledgee: Dongying rural commercial bank Limited by Share Ltd. West City Branch Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2021980016908 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Temperature controlled hydraulic packer Effective date of registration: 20231227 Granted publication date: 20170308 Pledgee: Dongying Rural Commercial Bank Co.,Ltd. Pledgor: DONGYING BAIHUA PETROLEUM TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2023980075105 |