CN109519141A - A kind of blowout preventer for sucker rod - Google Patents
A kind of blowout preventer for sucker rod Download PDFInfo
- Publication number
- CN109519141A CN109519141A CN201811540354.XA CN201811540354A CN109519141A CN 109519141 A CN109519141 A CN 109519141A CN 201811540354 A CN201811540354 A CN 201811540354A CN 109519141 A CN109519141 A CN 109519141A
- Authority
- CN
- China
- Prior art keywords
- sucker rod
- rubber
- frizing
- blowout preventer
- upper arm
- 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.)
- Granted
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 1
- 239000010779 crude oil Substances 0.000 abstract description 20
- 238000007790 scraping Methods 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 21
- 239000007787 solid Substances 0.000 description 15
- 239000003129 oil well Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000000505 pernicious effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Electric Cable Installation (AREA)
- Sealing Devices (AREA)
Abstract
The present invention relates to field mining equipment technical fields, and disclose a kind of blowout preventer for sucker rod, including annular preventer shell, and the top of the annular preventer shell is equipped with seal casinghousing, and the bottom surface of the seal casinghousing inner cavity is equipped with boss.By scraping the frictional force between grey rubber and sucker rod, when moving upwards sucker rod, a upward active force is provided for upper arm, rotate counterclockwise connector with fixing axle center axis, it is bonded with frizing rubber to sucker rod by lower arm, two frizing rubber are made to be bonded the inner surface of frizing rubber with the external of sucker rod, sucker rod is moved with respect to frizing rubber, crude oil outside sucker rod is scraped off, compared with prior art, it does not need artificially to control, active force between frizing rubber and sucker rod is small, reduce the speed of sucker rod abrasion, crude oil is effectively prevented to move out with sucker rod, it falls in well head and place, the problem of polluting environmental pollution.
Description
Technical field
The present invention relates to field mining equipment technical field, specially a kind of blowout preventer for sucker rod.
Background technique
Preventer is the device for carrying out closing well head in the operation process such as formation testing, well workover, complete well to oil well in the construction of oil field,
The purpose is to close oil well eye in the case where oil well has pressure, continuous control is kept to oil well, the ground entered in oil well
Layer fluid, which recycles, to be come, and is prevented well kick and blowout, is caused safety accident, according to the difference of working principle, can be divided into lock
Plate preventer and annular preventer, wherein annular preventer is mainly made of shell, top cover, glue core and the big part of piston four, work
It is to squeeze glue core using in-oil cylinder hydraulic drive piston upwards, make glue core to center deformation as principle, it will be oily
Well head is closed, hydraulic inside oil cylinder by controlling in actuating oil-pumping unit, is made piston press glue core and is deformed, until
The central ring of glue core is adapted with sucker rod, and preventer inner space is made to be only capable of moving up and down for sucker rod, will be attached to originally
Crude oil on sucker rod is wiped off and is fallen into well, and crude oil is avoided to move out with sucker rod, is fallen in well head and place, is polluted ring
Border, while the solid that sucker rod surface is adhered to being struck off, it avoids solid particle from entering between glue core and sucker rod, leads to preventer
Be not closed completely close problem.But in use, this mode for striking off sucker rod surface crude oil has the disadvantage that
1, it is in-oil cylinder it is hydraulic be difficult to accurately control, cannot be just right make glue core deform after central ring and oil pumping
Bar is adapted, and when in-oil cylinder hydraulic excessive, glue core is tightly pressed against sucker rod surface, and the active force between glue core and sucker rod is very
Greatly, the resistance for moving upwards sucker rod becomes larger, and glue core and sucker rod is caused to be prone to wear；When in-oil cylinder hydraulic too small, glue
Core deformation is not in place, and the central ring diameter value after the deformation of glue core is greater than the diameter value of sucker rod, makes crude oil on sucker rod not
It can sufficiently be struck off, crude oil is caused to move out with sucker rod, fallen in well head and place, pollute environmental pollution.
2, the deformation of glue core is not in place, the gap between glue core and sucker rod can be made excessive, when sucker rod is moved into oil well
When, the solid particle of sucker rod surface attachment enters between glue core and sucker rod, when preventer being made to close oil well mouth, is not closed completely
It is close, it causes crude oil and pernicious gas to reveal, pollutes environment.
In view of the above-mentioned problems, the present invention provides a kind of blowout preventer for sucker rod.
Summary of the invention
The present invention provides a kind of blowout preventer for sucker rod, which does not need artificially to control, and utilizes sucker rod
It is bonded frizing rubber with sucker rod with the frictional force scraped between grey rubber, frizing rubber is directly contacted with sucker rod, and the two
Between active force very little, enable the crude oil on sucker rod reduced while sufficiently being scraped off sucker rod and glue core abrasion
Speed, and the solid particle on sucker rod can be struck off, it avoids solid particle from entering between glue core and sucker rod, causes to prevent
Spray apparatus is not closed completely close problem.
The invention provides the following technical scheme: a kind of blowout preventer for sucker rod, including annular preventer shell, the annular are anti-
The top of spray apparatus shell is equipped with seal casinghousing, and the bottom surface of the seal casinghousing inner cavity is equipped with boss, and the inside of the boss opens up
There is limit hole, the inner wall of the seal casinghousing is equipped with fixing axle, and the external activity of the fixing axle is socketed with connector, the company
One end of fitting is equipped with frizing rubber, and the other end of the connector, which is equipped with, scrapes grey rubber, and the top of the seal casinghousing is equipped with
Pedestal, the inside of the pedestal offer centring hole, and the inside of the centring hole is equipped with sucker rod.
Further, dust collecting trough is formed between the side of the boss and the inner wall of seal casinghousing.
Further, the diameter value at the top of the limit hole is greater than the diameter value of its bottom.
Further, the connector includes upper arm, and one end of the upper arm, which is equipped with, scrapes grey rubber, the upper arm it is another
End is connected with lower arm, and the upper arm and lower arm junction offer mounting hole, the mounting hole and fixing axle pivot bush unit.
Further, the top surface of the upper arm offers semi-circular groove, and the diameter value of semi-circular groove is greater than the straight of sucker rod
Diameter value, the inside of the semi-circular groove, which is equipped with, scrapes grey rubber, described to scrape grey rubber semicircular in shape, and inner diameter values are less than sucker rod
Diameter value.
Further, the upper arm and lower arm are in 110 degree of angles.
Further, the quantity of the frizing rubber is two, two faces that two frizing rubber contact with each other point
It She You can be with intermeshing tooth.
Further, the side of frizing rubber close to the sucker rod offers semicircle compatible with sucker rod and is bonded
Slot.
The present invention have it is following the utility model has the advantages that
1, by scraping the frictional force between grey rubber and sucker rod, when moving upwards sucker rod, one is provided for upper arm
A upward active force rotates counterclockwise connector with fixing axle center axis, by lower arm with frizing rubber be bonded to
Sucker rod makes two frizing rubber paste the inner surface of frizing rubber and the external of sucker rod while sucker rod external engagement
It closes, sucker rod is moved with respect to frizing rubber, and the crude oil outside sucker rod is scraped off, compared with prior art, does not need artificially to control
System, the active force between frizing rubber and sucker rod is small, reduces the speed of sucker rod abrasion, effectively prevents crude oil with oil pumping
The problem of bar moves out, and falls in well head and place, pollutes environmental pollution.
2, by scraping the frictional force between grey rubber and sucker rod, when moving downward sucker rod, one is provided for upper arm
A downward active force rotates clockwise connector with fixing axle center axis, and promotion is scraped grey rubber and is bonded to sucker rod, makes
Scraping while grey rubber fastens outside sucker rod for two is bonded the inner surface for scraping grey rubber with sucker rod, and sucker rod is opposite to be scraped
Grey rubber movement, the solid on sucker rod surface is removed, avoids solid particle from entering between glue core and sucker rod, closes preventer
The problem of when closing oil well mouth, being not closed completely close, crude oil and pernicious gas caused to reveal, pollute environment.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
The schematic diagram of internal structure of seal casinghousing when Fig. 2 moves upwards for sucker rod；
Fig. 3 is the schematic diagram of internal structure of connector in Fig. 2；
The schematic diagram of internal structure of seal casinghousing when Fig. 4 moves downward for sucker rod；
Fig. 5 is the schematic diagram of internal structure of connector in Fig. 4；
Fig. 6 is the schematic top plan view of seal casinghousing internal structure in Fig. 4；
Fig. 7 is the structure chart of connector in Fig. 4.
In figure: 1- annular preventer shell, 2- seal casinghousing, 3- boss, 4- limit hole, 5- fixing axle, 6- connect
Fitting, 601- upper arm, 602- lower arm, 603- mounting hole, 7- frizing rubber, 8- scrape grey rubber, 9- pedestal, 10- centering
Hole, 11- sucker rod.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-7, a kind of blowout preventer for sucker rod, including annular preventer shell 1, the annular preventer shell 1
Top be equipped with seal casinghousing 2, the bottom surface of 2 inner cavity of seal casinghousing is equipped with boss 3, and the inside of the boss 3 opens up limited
The inner wall in position hole 4, the seal casinghousing 2 is equipped with fixing axle 5, and the external activity of the fixing axle 5 is socketed with connector 6, described
One end of connector 6 is equipped with frizing rubber 7, and the other end of the connector 6, which is equipped with, scrapes grey rubber 8, the top of the seal casinghousing 2
Portion is equipped with pedestal 9, and the inside of the pedestal 9 offers centring hole 10, and the inside of the centring hole 10 is equipped with sucker rod 11.
Further, it is formed with dust collecting trough between the side of the boss 3 and the inner wall of seal casinghousing 2, makes to accumulate in and scrapes
The solid particle on grey 8 surface of rubber is fallen into dust collecting trough along upper arm 601, avoid solid particle enter glue core and sucker rod 11 it
Between, the problem of when preventer being made to close oil well mouth, being not closed completely close, crude oil and pernicious gas caused to reveal, pollute environment.
Further, the diameter value at 4 top of limit hole is greater than the diameter value of its bottom, the angle rotated to connector 6
Degree is limited, and avoids 6 rotational angle of connector excessive, makes to scrape between grey rubber 8 and sucker rod 11 and has gap, solid particle
It is fallen into annular preventer shell 1 by gap, into when preventer between glue core and sucker rod 11, being made to close oil well mouth, is closed
The problem of closing imprecision, crude oil and pernicious gas caused to reveal, pollute environment.
Further, the connector 6 includes upper arm 601, and one end of the upper arm 601, which is equipped with, scrapes grey rubber 8, it is described on
The other end of arm 601 is connected with lower arm 602, and the upper arm 601 offers mounting hole 603, the installation with 602 junction of lower arm
Hole 603 and 5 pivot bush unit of fixing axle.
Further, the top surface of the upper arm 601 offers semi-circular groove, and the diameter value of semi-circular groove is greater than sucker rod 11
Diameter value, the inside of the semi-circular groove, which is equipped with, scrapes grey rubber 8, and described to scrape grey 8 semicircular in shape of rubber, inner diameter values, which are less than, takes out
The diameter value of beam hanger 11 makes to scrape grey rubber 8 when being stuck in 11 outside of sucker rod, scrapes ash using the flexible deformation increase for scraping grey rubber 8
Active force between rubber 8 and sucker rod 11, to increase the frictional force scraped between grey rubber 8 and sucker rod 11, it is ensured that scrape ash
While frictional force between rubber 8 and sucker rod 11 enough rotates connector 6, the solid particle outside sucker rod 11 is filled
Divide and strikes off.
Further, the upper arm 601 and lower arm 602 are in 110 degree of angles, and connector 6 is made to scrape grey rubber 8 and take out
Under frictional force effect between beam hanger 11 when rotation, frizing rubber 7 is controlled, when moving downward sucker rod 11, frizing
Rubber 7 is not contacted with sucker rod 11, is reduced the resistance that sucker rod 11 is subject to, is reduced the speed of the abrasion of sucker rod 11.
Further, the quantity of the frizing rubber 7 is two, two faces that two frizing rubber 7 contact with each other
The engagement of tooth, when guaranteeing that frizing rubber 7 is bonded with sucker rod 11, sucker rod 11 can be utilized with intermeshing tooth by being respectively equipped with
The crude oil on surface will not be such that the crude oil on 11 surface of sucker rod is sufficiently scraped off from the gap leakage between two frizing rubber 7.
Further, the side of frizing rubber 7 close to the sucker rod 11 offers semicircle compatible with sucker rod 11
Shape fitting groove increases the compactness between frizing rubber 7 and sucker rod 11, and making will not shape between frizing rubber 7 and sucker rod 11
At gap, strike off the crude oil outside sucker rod 11 more abundant.
In use, sucker rod 11 moves upwards first, make to connect using the frictional force scraped between grey rubber 8 and sucker rod 11
Part 6 is that center axis rotates counterclockwise with fixing axle 5, and lower arm 602 is rotated counterclockwise with frizing rubber 7, is bonded frizing rubber 7
To sucker rod 11, latter two right frizing rubber 7 makes inner surface and the oil pumping of frizing rubber 7 while 11 external engagement of sucker rod
The external fitting of bar 11, sucker rod 11 are moved with respect to frizing rubber 7, scrape off frizing rubber 7 by the crude oil outside sucker rod 11,
It does not need artificially to control, and the active force between frizing rubber 7 and sucker rod 11 is small, reduces the speed of the abrasion of sucker rod 11
The problem of degree, effectively prevents crude oil and moves out with sucker rod 11, falls in well head and place, pollutes environmental pollution.
When sucker rod 11 moves downward, make connector 6 with solid using the frictional force scraped between grey rubber 8 and sucker rod 11
Dead axle 5 is that center axis rotates clockwise, and lower arm 602 pushes frizing rubber 7 far from sucker rod 11, and grey rubber 8 is scraped in the promotion of upper arm 601
Be bonded makes two to scrape the inner surface and pumping for making to scrape grey rubber 8 while grey rubber 8 fastens outside sucker rod 11 to sucker rod 11
Beam hanger 11 is bonded, and sucker rod 11 is opposite to scrape the grey movement of rubber 8, and the solid on 11 surface of sucker rod is removed, accumulates in and scrapes grey rubber 8
The solid particle on surface is fallen into dust collecting trough along upper arm 601, and solid particle is avoided to enter between glue core and sucker rod 11, makes to prevent
The problem of when spray apparatus closes oil well mouth, being not closed completely close, crude oil and pernicious gas caused to reveal, pollute environment.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of blowout preventer for sucker rod, including annular preventer shell (1), it is characterised in that: the annular preventer shell (1)
Top be equipped with seal casinghousing (2), the bottom surface of seal casinghousing (2) inner cavity is equipped with boss (3), the inside of the boss (3)
It offers limit hole (4), the inner wall of the seal casinghousing (2) is equipped with fixing axle (5), the external activity set of the fixing axle (5)
It is connected to connector (6), one end of the connector (6) is equipped with frizing rubber (7), and the other end of the connector (6), which is equipped with, to be scraped
The top of grey rubber (8), the seal casinghousing (2) is equipped with pedestal (9), and the inside of the pedestal (9) offers centring hole (10),
The inside of the centring hole (10) is equipped with sucker rod (11).
2. a kind of blowout preventer for sucker rod according to claim 1, it is characterised in that: the side of the boss (3) and sealing
Dust collecting trough is formed between the inner wall of shell (2).
3. a kind of blowout preventer for sucker rod according to claim 1, it is characterised in that: the diameter at the top of the limit hole (4)
Value is greater than the diameter value of its bottom.
4. a kind of blowout preventer for sucker rod according to claim 1, it is characterised in that: the connector (6) includes upper arm
(601), one end of the upper arm (601) is equipped with and scrapes grey rubber (8), and the other end of the upper arm (601) is connected with lower arm
(602), the upper arm (601) and lower arm (602) junction offer mounting hole (603), the mounting hole (603) and fixing axle
(5) pivot bush unit.
5. a kind of blowout preventer for sucker rod according to claim 4, it is characterised in that: the top surface of the upper arm (601) opens up
There is semi-circular groove, the diameter value of semi-circular groove is greater than the diameter value of sucker rod (11), and the inside of the semi-circular groove, which is equipped with, scrapes ash
Rubber (8), described to scrape grey rubber (8) semicircular in shape, inner diameter values are less than the diameter value of sucker rod (11).
6. a kind of blowout preventer for sucker rod according to claim 4, it is characterised in that: the upper arm (601) and lower arm (602)
In 110 degree of angles.
7. a kind of blowout preventer for sucker rod according to claim 1, it is characterised in that: the quantity of the frizing rubber (7) is
Two, two faces that two frizing rubber (7) contact with each other are respectively equipped with can be with intermeshing tooth.
8. a kind of blowout preventer for sucker rod according to claim 1, it is characterised in that: the close oil pumping of the frizing rubber (7)
The side of bar (11) offers the compatible semicircle fitting groove with sucker rod (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540354.XA CN109519141B (en) | 2018-12-17 | 2018-12-17 | Blowout preventer for sucker rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540354.XA CN109519141B (en) | 2018-12-17 | 2018-12-17 | Blowout preventer for sucker rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109519141A true CN109519141A (en) | 2019-03-26 |
| CN109519141B CN109519141B (en) | 2020-12-01 |
Family
ID=65795834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811540354.XA Active CN109519141B (en) | 2018-12-17 | 2018-12-17 | Blowout preventer for sucker rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109519141B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205078240U (en) * | 2015-11-06 | 2016-03-09 | 中国石油天然气股份有限公司 | Online sucker rod paraffin scraper of light maintenance operation |
| CN205135563U (en) * | 2015-11-28 | 2016-04-06 | 王霞 | Oil recovery is frizing device for well |
| US20170067318A1 (en) * | 2014-03-11 | 2017-03-09 | Qinterra Technologies As | Tool For Internal Cleaning Of A Tubing Or Casing |
| CN108252677A (en) * | 2018-02-12 | 2018-07-06 | 新疆石油管理局有限公司准东勘探开发分公司 | The oil-pipe external wall well head oil-scraping device of variable path |
| CN108331554A (en) * | 2018-02-12 | 2018-07-27 | 新疆石油管理局有限公司准东勘探开发分公司 | The sucker rod well-head frizing wax apparatus of variable path |
-
2018
- 2018-12-17 CN CN201811540354.XA patent/CN109519141B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170067318A1 (en) * | 2014-03-11 | 2017-03-09 | Qinterra Technologies As | Tool For Internal Cleaning Of A Tubing Or Casing |
| CN205078240U (en) * | 2015-11-06 | 2016-03-09 | 中国石油天然气股份有限公司 | Online sucker rod paraffin scraper of light maintenance operation |
| CN205135563U (en) * | 2015-11-28 | 2016-04-06 | 王霞 | Oil recovery is frizing device for well |
| CN108252677A (en) * | 2018-02-12 | 2018-07-06 | 新疆石油管理局有限公司准东勘探开发分公司 | The oil-pipe external wall well head oil-scraping device of variable path |
| CN108331554A (en) * | 2018-02-12 | 2018-07-27 | 新疆石油管理局有限公司准东勘探开发分公司 | The sucker rod well-head frizing wax apparatus of variable path |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109519141B (en) | 2020-12-01 |
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Effective date of registration: 20201113 Address after: 538000 Guangxi Fangchenggang Port Area East Drainage Reclamation Port Area 1 Road West Side Applicant after: Fangcheng and Hong Kong and Macao grain & Oil Industry Co.,Ltd. Address before: 310016 No. 48, Yanggong New Village, Yanggong Village, Jiubao Town, Jianggan District, Hangzhou City, Zhejiang Province Applicant before: Zhang Shengfu |
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Effective date of registration: 20210318 Address after: 538000 room 120, 1st floor, building 3, yunlang Science Park, Fangcheng District, Fangchenggang City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Beibu Gulf grain and oil technology research Co.,Ltd. Address before: 538000 Guangxi Fangchenggang Port Area East Drainage Reclamation Port Area 1 Road West Side Patentee before: Fangcheng and Hong Kong and Macao grain & Oil Industry Co.,Ltd. |