CN111544930A - Anti-scaling anti-blocking large-capacity filtration treatment method and device - Google Patents
Anti-scaling anti-blocking large-capacity filtration treatment method and device Download PDFInfo
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- CN111544930A CN111544930A CN202010431904.5A CN202010431904A CN111544930A CN 111544930 A CN111544930 A CN 111544930A CN 202010431904 A CN202010431904 A CN 202010431904A CN 111544930 A CN111544930 A CN 111544930A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
Abstract
The invention relates to the technical field of filtration process of oilfield produced water, in particular to an anti-scaling anti-blocking high-capacity filtration treatment method and a device, wherein the method comprises the following steps: the produced water is sequentially filtered for the first time by modified porous polypropylene particles or porous glass fiber reinforced plastic particles in the filter, filtered for the second time by sand or quartz sand and filtered for the third time by gravels, and filtered for the fourth time by magnetite particles in a supporting layer at the bottom of the filter, and finally purified water is obtained. The latter includes at least one filter, at least one filtration lift pump and at least one backwash pump. The invention is suitable for further filtering after the produced water of various oil and gas fields is purified, the filter adopts sand filter layers with different grades to ensure the filtering precision, the backwashing effect is good, the backwashing water quantity is small, and the forced removal is carried out by adopting a machine pump, thereby effectively improving the filtering and filtering material regeneration effects, effectively reducing the oil content and suspended matters in the produced water, preventing the filtering material from hardening and scaling, and having wide application prospect.
Description
Technical Field
The invention relates to the technical field of filtration processes of oilfield produced water, and discloses an anti-scaling anti-blocking high-capacity filtration treatment method and device.
Background
The produced water in the oil field generally has the characteristics of high mineralization degree, high hardness, high silicon content, oil content and suspended matter content, and the conventional filter adopts water washing or air-water combined backwashing, so that the conventional filter is difficult to thoroughly clean in actual operation, the filter material is hardened, and the filter has bias flow inside, so that the filter effect is reduced.
Disclosure of Invention
The invention provides an anti-scaling anti-blocking high-capacity filtration treatment method and device, overcomes the defects of the prior art, and can effectively solve the problems of easy scaling, blockage and hardening and poor dirt holding capacity of filter materials in the existing oilfield produced water process.
One of the technical schemes of the invention is realized by the following measures: a large-capacity anti-scaling and anti-blocking filtration treatment method is carried out according to the following steps: firstly, delivering produced water to a filter through a pipeline, distributing water in the filter through a top sieve tube, and then performing primary filtration in a first layer of filter material of modified porous polypropylene particles or porous glass fiber reinforced plastic particles with the particle size of not more than 1mm to 2mm to obtain primary purified water; secondly, the primary purified water enters a second layer of filter material of sea sand or quartz sand with the particle size distribution of 0.25mm, 0.5mm and 0.75mm for secondary filtration to obtain secondary purified water; thirdly, the secondary purified water enters a third layer of filter material of gravels with the grain diameter of 1mm to 16mm for third filtration to obtain extracted purified water; fourthly, the extracted purified water enters a bottom supporting layer of a filter filled with magnetite particles with the particle size of 32mm to 64mm for fourth filtration to obtain bottom purified water; and fifthly, collecting the bottom purified water to the bottom sieve tube, and discharging the bottom purified water when the flow velocity of the water flow is lower than 0.8m/s to obtain the purified water.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the lift of the lift pump is not less than 40m, and the flow velocity of water flow in the sieve tube is not more than 0.8 m/s.
The thickness of the first layer of filter material is 1.2m, and the density and the proportion of the filter material to water are 1.1: 1.
when the grain size of the second layer of filter material is 0.25mm, the thickness of the filter material is 0.4 m; when the second layer filter material particle size is 0.5mm, filter material thickness is 0.2m, when the second layer filter material particle size is 0.75mm, filter material thickness is 0.2m, and the density proportion of filter material and water is 2.2 to 2.5: 1.
when the grain size of the third layer of filter material is 1mm to 2mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 2mm to 4mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 4 mm-8 mmmm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 8mm to 16mm, the thickness of the filter material is 0.1m, and the density and the proportion of the filter material to water are 2.2 to 2.5: 1.
when the grain size of the filter material in the support layer at the bottom of the filter is 32mm to 64mm, the thickness of the filter material is 0.1m to 0.3 m.
The inner diameter of the sieve tube is not more than 10 μm.
The second technical scheme of the invention is realized by the following measures: a device for implementing the anti-scaling anti-blocking large-capacity filtration treatment method comprises at least one filter and at least one back-washing pump, wherein a first water inlet pipeline is fixedly communicated with a water inlet at the top of each filter, a back-washing water inlet pipeline is fixedly communicated between a water outlet at the upper part of each filter and a water inlet of the back-washing pump, a back-washing water outlet pipeline is fixedly communicated between a water outlet at the bottom of each filter and a water inlet at the lower part of each filter, a purified water outlet pipeline is fixedly communicated with a water outlet at the bottom of each filter, a second water inlet pipeline is fixedly communicated between the first water inlet pipeline and the water inlet at the upper part of each filter, a first valve is fixedly arranged on a first water inlet pipeline between the inlet of the second water inlet pipeline and the water inlet at the top of the filter, a sewage discharge pipeline is fixedly communicated with a sewage discharge pipeline, and a, the third valve is fixedly mounted on the purified water outlet pipeline, the fourth valve is fixedly mounted on the backwash water outlet pipeline, the fifth valve and the eighth valve are fixedly mounted on the backwash water inlet pipeline in sequence, and the sixth valve is fixedly mounted on the second water inlet pipeline.
The following is further optimization or/and improvement of the second technical scheme of the invention:
a bypass pipeline is communicated between the backwash water inlet pipeline and the purified water outlet pipeline, a seventh valve is fixedly mounted on the bypass pipeline, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are electric butterfly valves or pneumatic butterfly valves.
The invention is suitable for further filtering after the produced water of various oil and gas fields is purified, the filter adopts sand filter layers with different grades to ensure the filtering precision, the backwashing effect is good, the backwashing water quantity is small, and the forced removal is carried out by adopting a machine pump, thereby effectively improving the filtering and filtering material regeneration effects, effectively reducing the oil content and suspended matters in the produced water, preventing the filtering material from hardening and scaling, and having wide application prospect.
Drawings
FIG. 1 is a schematic process flow diagram of the preferred embodiment of the present invention.
The codes in the figures are respectively: the device comprises a sieve tube 1, a filter 2, a backwash pump 3, an eighth valve 4, a first water inlet pipeline 5, a sewage discharge pipeline 6, a second water inlet pipeline 7, a backwash water inlet pipeline 8, a backwash water outlet pipeline 9, a clean water outlet pipeline 10, a bypass pipeline 11, a first valve 12, a second valve 13, a third valve 14, a fourth valve 15, a fifth valve 16, a sixth valve 17 and a seventh valve 18.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
The invention is further described below with reference to the following examples:
example 1: as shown in the attached figure 1, the anti-scaling anti-blocking large-capacity filtration treatment method is carried out according to the following method: firstly, delivering produced water to a filter 2 through a pipeline, distributing the water in the filter 2 through a top sieve tube 1, and then performing primary filtration in a first layer of filter material consisting of modified porous polypropylene particles or porous glass fiber reinforced plastic particles with the particle size of not more than 1mm to 2mm to obtain primary purified water; secondly, the primary purified water enters a second layer of filter material consisting of sea sand or quartz sand with the grain size of 0.25mm, 0.5mm and 0.75mm for secondary filtration to obtain secondary purified water; thirdly, the secondary purified water enters a third layer of filter material consisting of gravels with the grain diameter of 1mm to 16mm for third filtration to obtain extracted purified water; fourthly, the extracted purified water enters a bottom supporting layer of a filter 2 consisting of magnetite particles with the particle size of 32mm to 64mm for fourth filtration to obtain bottom purified water; fifthly, collecting the bottom purified water to the bottom sieve tube 1, and discharging the bottom purified water under the condition that the flow velocity of the water flow is lower than 0.8m/s to obtain the purified water.
The invention relates to an anti-scaling anti-blocking large-capacity filtration treatment method, which is based on a composite interception technology and a filtering material recycling technology and adopts porous polypropylene particles or porous glass fiber reinforced plastic particles, sea sand or quartz sand and gravels with different particle sizes to form a deep-bed filter layer, so that the filtration dirt-carrying capacity can be increased. The top of the filter 2 is made of a light oleophylic porous material to increase the dirt holding capacity and capacity, the lower part of the filter is made of filter material layers with different grades to ensure the filtering precision, and the oil content of the treated water is less than or equal to 5mg/L and the suspended matter is less than or equal to 5mg/L aiming at the produced water with high mineralization degree (10000 mg/L to 30000 mg/L) and high hardness (300 mg/L to 1000 mg/L) (oil content is less than or equal to 30mg/L and suspended matter is less than or equal to 30 mg/L).
Example 2: as shown in the attached figure 1, the anti-scaling anti-blocking large-capacity filtration treatment method is carried out according to the following method: firstly, delivering produced water to a filter 2 through a pipeline, distributing the water in the filter 2 through a top sieve tube 1, and then performing primary filtration in a first layer of filter material of modified porous polypropylene particles or porous glass fiber reinforced plastic particles with the particle size of not more than 1mm or 2mm to obtain primary purified water; secondly, the primary purified water enters a second layer of filter material of sea sand or quartz sand with the particle size distribution of 0.25mm, 0.5mm and 0.75mm for secondary filtration to obtain secondary purified water; thirdly, the secondary purified water enters a third layer of filter material of gravels with the grain diameter of 1mm or 16mm for third filtration to obtain extracted purified water; fourthly, the extracted purified water enters a bottom supporting layer of a filter 2 filled with magnetite particles with the particle size of 32mm or 64mm for fourth filtration to obtain bottom purified water; fifthly, collecting the bottom purified water to the bottom sieve tube 1, and discharging the bottom purified water under the condition that the flow velocity of the water flow is lower than 0.8m/s to obtain the purified water.
Example 3: as optimization of the above embodiment, the lift of the lift pump is not less than 40m, and the flow velocity of water flow in the screen pipe 1 is not higher than 0.8 m/s.
Example 4: as optimization of the embodiment, the thickness of the first layer of filter material is 1.2m, and the density specific gravity of the filter material and water is 1.1: 1.
example 5: as the optimization of the embodiment, when the grain size of the second layer of filter material is 0.25mm, the thickness of the filter material is 0.4 m; when the second layer filter material particle size is 0.5mm, filter material thickness is 0.2m, when the second layer filter material particle size is 0.75mm, filter material thickness is 0.2m, and the density proportion of filter material and water is 2.2 to 2.5: 1.
example 6: as optimization of the embodiment, when the grain size of the third layer of filter material is 1mm to 2mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 2mm to 4mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 4 mm-8 mmmm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 8mm to 16mm, the thickness of the filter material is 0.1m, and the density and the proportion of the filter material to water are 2.2 to 2.5: 1.
example 7: as optimization of the embodiment, when the grain size of the filter material in the bottom support layer of the filter 2 is 32mm to 64mm, the thickness of the filter material is 0.1m to 0.3 m.
Example 8: as optimization of the above embodiment, the screen inner diameter is not more than 10 μm.
Example 9: as shown in fig. 1, the device for implementing the anti-scaling anti-blocking large-capacity filtration treatment method according to the above embodiment includes at least one filter 2 and at least one backwash pump 3, a first water inlet pipe 5 is fixedly connected to a top water inlet of each filter 2, a backwash water inlet pipe 8 is fixedly connected between an upper water outlet of each filter 2 and a water inlet of the backwash pump 3, a backwash water outlet pipe 9 is fixedly connected between a water outlet of the backwash pump 3 and a lower water inlet of each filter 2, a purified water outlet pipe 10 is fixedly connected to a bottom water outlet of each filter 2, a second water inlet pipe 7 is fixedly connected between the first water inlet pipe 5 and an upper water inlet of each filter 2, a first valve 12 is fixedly installed on the first water inlet pipe 5 between an inlet of the second water inlet pipe 7 and the top water inlet of the filter 2, and a drain pipe is fixedly connected to the first water inlet pipe 5 between the first valve 12 and the top water inlet of the filter 2 Line 6, fixed mounting has second valve 13 on the blowdown pipeline 6, and fixed mounting has third valve 14 on the water purification outlet line 10, and fixed mounting has fourth valve 15 on the back flush outlet line 9, and fixed mounting has fifth valve 16 and eighth valve 4 in proper order on the back flush inlet line 8, and fixed mounting has sixth valve 17 on the second inlet line 7.
The invention has good backwashing effect and small water quantity, incoming water is adopted for washing in the early stage of backwashing, self-circulation mutual scrubbing in the middle stage and purified water washing replacement in the later stage are adopted, so that scaling and hardening can be effectively prevented, the filter material is in a flowing state in the backwashing stage, and the calcium scale and pollutants formed on the surface of the filter material are removed by utilizing different density differences of porous polypropylene particles or porous glass fiber reinforced plastic particles, sea sand or quartz sand and gravel and mutual scrubbing in backwashing water flow, so that the filter material is prevented from being hardened to cause filter pollution blockage, and the purpose of scale prevention is realized; meanwhile, the machine pump is adopted for forced removal, and the filtering and filter material regeneration effects are good.
Example 10: as shown in fig. 1, a bypass line 11 is communicated between the backwash water inlet line 8 and the purified water outlet line 10, a seventh valve 18 is fixedly installed on the bypass line 11, and the first valve 12, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17, the seventh valve 18 and the eighth valve 4 are all electric butterfly valves or pneumatic butterfly valves.
In the invention, when the device implementing the anti-scaling anti-blocking large-capacity filtration treatment method is used for back washing, the operation process is as follows: during backwashing, the first valve 12 and the third valve 14 are closed, and the filter 2 is isolated from the system; opening a sixth valve 17 and a second valve 13, enabling the produced water to enter the filter through a second water inlet pipeline 7, stirring the first layer of filter material by using incoming water, cleaning for 3min, and discharging the intercepted pollutants after the incoming water breaks away the first layer of filter material through a sewage discharge pipeline 6; closing the sixth valve 17 and the second valve 13, opening the fourth valve 15 and the fifth valve 16, starting the backwashing pump 3, discharging the first layer of filter material discharged from the backwashing water inlet pipeline 8 through the fifth valve 16, pumping the first layer of filter material to the backwashing pump 3, forcibly and mechanically impacting the filter material through the backwashing pump 3 to further separate pollutants from the filter material, stirring the second layer of filter material and the third layer of filter material by the pollutants and the filter material, and performing mutual scrubbing by using gravel and polypropylene particles to regenerate the filter material; when more than two filters 2 exist, the seventh valve 18 and the second valve 13 need to be opened, the fifth valve 16 needs to be closed, and the outlet water of other filters 2 is used for flushing.
In conclusion, the invention is suitable for further filtering after the produced water of various oil and gas fields is purified, the filter 2 adopts sand filter layers with different grades to ensure the filtering precision, the backwashing effect is good, the backwashing water quantity is small, and the forced removal is carried out by adopting the pump, thereby effectively improving the filtering and filter material regeneration effects, effectively reducing the oil content and suspended matters in the produced water, preventing the hardening and scaling of the filter material and having wide application prospect.
The above technical features constitute embodiments of the present invention, which have strong adaptability and implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (9)
1. A large-capacity anti-scaling and anti-blocking filtration treatment method is characterized by comprising the following steps: firstly, delivering produced water to a filter through a pipeline, distributing water in the filter through a top sieve tube, and then performing primary filtration in a first layer of filter material of modified porous polypropylene particles or porous glass fiber reinforced plastic particles with the particle size of not more than 1mm to 2mm to obtain primary purified water; secondly, the primary purified water enters a second layer of filter material of sea sand or quartz sand with the particle size distribution of 0.25mm, 0.5mm and 0.75mm for secondary filtration to obtain secondary purified water; thirdly, the secondary purified water enters a third layer of filter material of gravels with the grain diameter of 1mm to 16mm for third filtration to obtain extracted purified water; fourthly, the extracted purified water enters a bottom supporting layer of a filter filled with magnetite particles with the particle size of 32mm to 64mm for fourth filtration to obtain bottom purified water; and fifthly, collecting the bottom purified water to the bottom sieve tube, and discharging the bottom purified water when the flow velocity of the water flow is lower than 0.8m/s to obtain the purified water.
2. The anti-scaling anti-clogging large-capacity filtering treatment method according to claim 1, characterized in that the lift of the lift pump is not less than 40m, and the flow velocity of the water in the sieve tube is not higher than 0.8 m/s.
3. The anti-scaling anti-clogging large-capacity filtration treatment method according to claim 1 or 2, characterized in that the thickness of the first layer of filter material is 1.2m, the density specific gravity of the filter material and water is 1.1: 1.
4. the anti-scaling anti-clogging large-capacity filtration treatment method according to claim 1, 2 or 3, characterized in that when the grain size of the second layer of filter material is 0.25mm, the thickness of the filter material is 0.4 m; when the second layer filter material particle size is 0.5mm, filter material thickness is 0.2m, when the second layer filter material particle size is 0.75mm, filter material thickness is 0.2m, and the density proportion of filter material and water is 2.2 to 2.5: 1.
5. the method for large-capacity filtering treatment of scale prevention and blockage prevention according to claim 1, 2, 3 or 4, characterized in that when the grain size of the third layer of filter material is 1mm to 2mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 2mm to 4mm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 4 mm-8 mmmm, the thickness of the filter material is 0.1 m; when the grain size of the third layer of filter material is 8mm to 16mm, the thickness of the filter material is 0.1m, and the density and the proportion of the filter material to water are 2.2 to 2.5: 1.
6. the method for large-capacity filtration treatment with scale prevention and blockage prevention according to claim 1, 2, 3, 4 or 5, characterized in that when the grain size of the filter material in the support layer at the bottom of the filter is 32mm to 64mm, the thickness of the filter material is 0.1m to 0.3 m.
7. The anti-scaling anti-clogging large-capacity filtration treatment method according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that the inside diameter of the sieve tube is not more than 10 μm.
8. An apparatus for implementing the anti-scaling anti-clogging high-capacity filtration treatment method according to any one of claims 1 to 7, comprising at least one filter and at least one backwash pump, wherein a first water inlet pipe is fixedly communicated with a top water inlet of each filter, a backwash water inlet pipe is fixedly communicated between an upper water outlet of each filter and a water inlet of the backwash pump, a backwash water outlet pipe is fixedly communicated between a water outlet of the backwash pump and a lower water inlet of the filter, a purified water outlet pipe is fixedly communicated with a bottom water outlet of each filter, a second water inlet pipe is fixedly communicated between the first water inlet pipe and the upper water inlet of each filter, a first valve is fixedly installed on a first water inlet pipe between an inlet of the second water inlet pipe and the top water inlet of the filter, and a sewage discharge pipe is fixedly communicated with a first water inlet pipe between the first valve and the top water inlet of the filter, the sewage draining pipeline is fixedly provided with a second valve, the water purifying water outlet pipeline is fixedly provided with a third valve, the backwashing water outlet pipeline is fixedly provided with a fourth valve, the backwashing water inlet pipeline is sequentially and fixedly provided with a fifth valve and an eighth valve, and the second water inlet pipeline is fixedly provided with a sixth valve.
9. The device of claim 8, wherein a bypass line is connected between the backwash water inlet line and the clean water outlet line, a seventh valve is fixedly mounted on the bypass line, and the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve and the eighth valve are all electric butterfly valves or pneumatic butterfly valves.
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| CN202010431904.5A CN111544930A (en) | 2020-05-20 | 2020-05-20 | Anti-scaling anti-blocking large-capacity filtration treatment method and device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101732904A (en) * | 2008-11-12 | 2010-06-16 | 湖北中碧环保科技有限公司 | Filter device backwashing system |
| US20140367322A1 (en) * | 2013-06-18 | 2014-12-18 | S.P. Kinney Engineers, Inc. | Rotary strainer |
| CN104815463A (en) * | 2015-04-09 | 2015-08-05 | 余金海 | Cycle self-cleaning filter |
| CN206198787U (en) * | 2016-07-08 | 2017-05-31 | 吴印强 | High efficiency composition ceramic filtration device |
| KR101742563B1 (en) * | 2016-08-31 | 2017-06-02 | (주)신명건설기술공사 | Echo terminal disposal plant of sewage |
-
2020
- 2020-05-20 CN CN202010431904.5A patent/CN111544930A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101732904A (en) * | 2008-11-12 | 2010-06-16 | 湖北中碧环保科技有限公司 | Filter device backwashing system |
| US20140367322A1 (en) * | 2013-06-18 | 2014-12-18 | S.P. Kinney Engineers, Inc. | Rotary strainer |
| CN104815463A (en) * | 2015-04-09 | 2015-08-05 | 余金海 | Cycle self-cleaning filter |
| CN206198787U (en) * | 2016-07-08 | 2017-05-31 | 吴印强 | High efficiency composition ceramic filtration device |
| KR101742563B1 (en) * | 2016-08-31 | 2017-06-02 | (주)신명건설기술공사 | Echo terminal disposal plant of sewage |
Non-Patent Citations (1)
| Title |
|---|
| 全国勘察设计注册工程师环保专业管理委员会，中国环境保护产业协会编: "《注册环保工程师专业考试复习教材 水污染防治工程技术与实践 上 第4版》", 31 March 2017, 中国环境出版社 * |
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Effective date of registration: 20210318 Address after: 100120 No.6 liupukang street, Xicheng District, Beijing Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Applicant after: CNPC (XINJIANG) PETROLEUM ENGINEERING Co.,Ltd. Address before: 100032 No.6 liupukang street, Xicheng District, Beijing Applicant before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Applicant before: CNPC (XINJIANG) PETROLEUM ENGINEERING Co.,Ltd. |
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Application publication date: 20200818 |