CN114737932A - Natural gas well head gas production device - Google Patents
Natural gas well head gas production device Download PDFInfo
- Publication number
- CN114737932A CN114737932A CN202210400418.6A CN202210400418A CN114737932A CN 114737932 A CN114737932 A CN 114737932A CN 202210400418 A CN202210400418 A CN 202210400418A CN 114737932 A CN114737932 A CN 114737932A
- Authority
- CN
- China
- Prior art keywords
- gas
- gas production
- fixedly connected
- production device
- pipe
- 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.)
- Pending
Links
- 239000007789 gas Substances 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 53
- 239000002343 natural gas well Substances 0.000 title claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000003345 natural gas Substances 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 34
- 238000004140 cleaning Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 15
- 238000000605 extraction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
Abstract
The invention relates to the field of gas production devices, in particular to a natural gas wellhead gas production device which comprises a main pipe A for gas production, two branch pipes fixedly connected to the main pipe A, and two spiral rods rotating in the two branch pipes. Further, natural gas well head gas production device is still including rotating the main shaft on being responsible for A to and the rigid coupling is at main epaxial drive wheel A, and two auxiliary frames of rigid coupling on two branch pipes, and two on two hob of rigid coupling from driving wheel A, two hob rotate respectively to be connected on two auxiliary frames, two from driving wheel A all with drive wheel A meshing transmission. Furthermore, the main shaft is also rotatably connected with an auxiliary wheel which assists the two driven wheels A to rotate stably. The device has the advantage of preventing the gas production pipeline from being blocked to influence the gas production speed.
Description
Technical Field
The invention relates to the field of gas production devices, in particular to a natural gas wellhead gas production device.
Background
With the development of the water-containing gas field, a large amount of impurities appear in a gas production pipeline along with the natural gas collection process, and the pipeline is blocked due to long-term accumulation, so that the gas production speed is influenced.
The invention with the publication number of 113503145 discloses a drainage gas production device for natural gas production, which comprises a gas production well, a gas production device body, a fixed block, a foaming agent storage tank, an electromagnetic valve, an input pump, an air extraction pipe and an extraction pump, wherein the gas production device body is arranged in the gas production well, the fixed block is welded on the side of the upper part of the gas production device body, the fixed block is fixed with the top end of the gas production well through a bolt, the top end of the gas production device body is in threaded connection with a sealing cover, the air extraction pipe penetrates through the sealing cover, the upper part of the air extraction pipe is connected with the extraction pump, and an extraction cover is welded at the lower end of the air extraction pipe. The invention has the defect that the gas production speed is influenced due to the fact that the gas production pipeline is not blocked.
Disclosure of Invention
The invention aims to provide a natural gas wellhead gas production device which has the advantage of preventing a gas production pipeline from being blocked to influence the gas production speed.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a natural gas well head gas production device, is including being used for the person in charge A of gas production to and two branch pipes of rigid coupling on being responsible for A, and rotate two hob in two branch pipes.
Further, natural gas well head gas production device is still including rotating the main shaft on being responsible for A to and the rigid coupling is at main epaxial drive wheel A, and two auxiliary frames of rigid coupling on two branch pipes, and two on two hob of rigid coupling from driving wheel A, two hob rotate respectively to be connected on two auxiliary frames, two from driving wheel A all with drive wheel A meshing transmission.
Furthermore, the main shaft is also rotatably connected with an auxiliary wheel which assists the two driven wheels A to rotate stably.
Drawings
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic view of a cleaning manifold;
FIG. 2 is a schematic view of the construction of the spindle;
FIG. 3 is a schematic view of the structure for driving two screw rods to rotate;
FIG. 4 is a view showing a position structure of a main pipe A and an installation pipe;
FIG. 5 is a view of the configuration of FIG. 4 and the position of the gas and liquid lines;
FIG. 6 is a schematic view of a structure for cleaning two gas-liquid branch pipes;
FIG. 7 is a schematic view of the structure for driving two pushing rods;
FIG. 8 is a schematic view of a power transmission configuration;
FIG. 9 is a schematic diagram of the configuration of the clean gas liquid line;
FIG. 10 is a block diagram of an uphole gas production unit.
Detailed Description
Referring to fig. 1, an implementation process for cleaning a gas production pipeline to prevent impurities from being accumulated and causing the reduction of gas production efficiency is described in detail:
a natural gas wellhead gas production device comprises a main pipe A11 for gas production, two branch pipes 14 are fixedly connected to the main pipe A11, natural gas produced by the main pipe A11 flows out of the two branch pipes 14 for guiding and collecting, impurities can be accumulated in a pipeline in the process of collecting the natural gas, and the impurities are prevented from being accumulated at the joint of the two branch pipes 14, therefore, a spiral rod 31 is respectively arranged in the two branch pipes 14, the spiral rod 31 can rotate around the spiral rod 31 under the stress condition to play a role in speed regulation on the flowing natural gas, the impurities can be pushed when the impurities are accumulated, the impurities are prevented from being accumulated, spiral impellers are arranged on the two spiral rods 31, the spiral rods 31 can be pushed to rotate when the natural gas rapidly flows, the impurities are continuously removed when the gas production is automatically carried out, and the blockage of the two branch pipes 14 is prevented, conditions that affect the efficiency of natural gas collection occur.
With the above embodiments, the following functions can also be realized;
with reference to fig. 1, 2 and 3, the implementation of the cleaning of the two partial tubes is explained in detail:
the main pipe A11 is rotatably connected with a main shaft 21, the main shaft 21 is fixedly connected with a driving wheel A22, two branch pipes 14 are fixedly connected with auxiliary frames 33, two spiral rods 31 are fixedly connected with driven wheels A32, the two spiral rods 31 are respectively rotatably connected with the two auxiliary frames 33, two driven wheels A32 are respectively meshed with the driving wheel A22 for transmission, the main shaft 21 is fixedly connected with an output shaft of a speed reducing motor I, the speed reducing motor I is fixedly connected with a main pipe A11, the speed reducing motor I is started to drive the main shaft 21 to rotate, the main shaft 21 drives the driving wheel A22 to rotate, the driving wheel A22 is meshed with the two driven wheels A32 to rotate, the two driven wheels A32 drive the two spiral rods 31 to rotate, the inner walls of the two branch pipes 14 are cleaned, the accumulation of impurities is prevented, the reduction of gas production efficiency is caused, the two auxiliary frames 33 are internally and externally connected circular rings, the upper ends and the lower ends of the outer circular rings are cut, make two and divide pipe 14 inner wall lower extremes not to block to the realization is discharged impurity completely along with the rotation of two hob 31, can not hesitate to block the ejection of compact that influences impurity.
With the above embodiments, the following functions can also be realized;
referring to fig. 3, the implementation process of assisting the two driven wheels a to rotate smoothly and drive the two screw rods to clean two branch pipe impurities is described in detail:
still be connected with the auxiliary wheel on the main shaft 21 in a rotation way, two are all driven from wheel A32 and auxiliary wheel meshing transmission, and the auxiliary wheel plays the effect of bearing to two follow wheels A32, ensures that two can steadily reliably drive two hob 31 branch and rotate from wheel A32.
With the above embodiments, the following functions can also be realized;
referring to fig. 4, the detailed implementation process of the main shaft cleaning the air inlet duct of the main pipe a is described:
the main shaft 21 is fixedly connected with a double-helix blade, and the main shaft 21 drives the double-helix blade to rotate when rotating so as to clean an air inlet pipeline of the main pipe A11.
With the above embodiments, the following functions can also be realized;
with reference to fig. 4 and 5, the gas production process is explained in detail:
fixedly connected with drive wheel B23 and drive wheel C24 on main shaft 21, it is connected with down takeover I12 to rotate between drive wheel B23 and drive wheel C24, it is connected with down takeover II 13 to rotate on drive wheel C24, fixedly connected with installation pipe 41 and gas-liquid pipe 51 on being responsible for A11, gas-liquid pipe 51 fixed connection is on installation pipe 41, lower takeover I12 and the equal fixed connection of lower takeover II 13 are on gas-liquid pipe 51, installation pipe 41 mainly collects the natural gas of natural gas layer loss, and gas-liquid pipe 51 mainly collects liquid layer and mixed natural gas, and lower takeover I12 and the main natural gas that is the gas layer of collecting of lower takeover II 13, the rethread is responsible for A11 and is collected and is handled, and the two spiral cleaning of lower takeover II 13 is mainly carried out under the rotation of fixedly connected's blade on main shaft 21, prevent to cause the jam of impurity.
With the above embodiments, the following functions can also be realized;
referring to fig. 6 and 8, the implementation of the sand cleaning treatment on the two gas-liquid branch pipes for collecting gas-liquid mixture is described in detail:
the gas-liquid pipe 51 is fixedly connected with two gas-liquid branch pipes 52, the two gas-liquid branch pipes 52 are rotatably connected with the cleaning wheels 61, the two cleaning wheels 61 are fixedly connected with driven wheels B62, the two driven wheels B62 are in meshing transmission with a driving wheel B23, the driving wheel B23 is driven to rotate when the main shaft 21 rotates, the driving wheel B23 is in meshing drive with two driven wheels B62 to rotate, the two driven wheels B62 drive the two cleaning wheels 61 to rotate, the two cleaning wheels 61 clean the two gas-liquid branch pipes 52, gas-liquid mixtures are mainly collected in the two gas-liquid branch pipes 52, sand exists in liquid, the sand can block the two gas-liquid branch pipes 52 due to accumulation of the sand, the cleaning of the two gas-liquid branch pipes 52 can ensure the gas production speed and efficiency in the gas production process, the gas production progress is prevented from being influenced, the purpose of rapid gas production is achieved, a notch is formed in the middle of the driving wheel B23, can guarantee to connect between lower takeover I12 and the person in charge A11, guarantee gaseous smooth through.
With the above embodiments, the following functions can also be realized;
referring to fig. 7, 8, 9 and 10, the implementation of the cleaning of the two outlet manifolds is described in detail:
two gas outlet pipes 42 fixedly connected with are arranged on the installation pipe 41, two gas outlet pipes 42 are connected with a pushing rod 81 in a rotating mode, two pushing rods 81 are connected with a driven wheel C82 in a fixed mode, two driven wheels C82 are in meshing transmission with a driving wheel C24, the driving wheel C24 is driven to rotate when the main shaft 21 rotates, two driven wheels C82 are driven to rotate by the driving wheel C24 in a meshing mode, two driven wheels C82 drive two pushing rods 81 to rotate, two pushing rods 81 rotate to clean the two gas outlet pipes 42, blockage caused by impurities in the two gas outlet pipes 42 is prevented, a notch is formed in the middle of the driving wheel C24, the two gas outlet pipes I12 and the two lower connecting pipes II 13 can be communicated with each other, and smooth passing of gas is guaranteed.
With the above embodiments, the following functions can also be realized;
with reference to FIGS. 6, 7 and 9, the implementation of the clean gas liquid line is detailed:
lower takeover I12 internal rotation is connected with annular rack 71, fixedly connected with prevents stifled wheel 72 on the annular rack 71, annular rack 71 and two driven wheel B62 meshing transmission, two are driven wheel B62 and rotate down meshing drive annular rack 71 and rotate, annular rack 71 drives prevents stifled wheel 72 and goes to, prevents stifled wheel 72 and rotates down and cleans gas-liquid pipe 51, prevents that the impurity in the gas-liquid mixture from piling up, influences the circulation of liquid in the gas-liquid pipe 51.
With the above embodiments, the following functions can also be realized;
referring to fig. 1, an implementation of preventing gas leakage at the respective joints of the driving wheels B and C is described in detail:
the junction of drive wheel B23 and drive wheel C24 all is provided with the sealing washer, can effectually prevent to appear gaseous the revealing when drive wheel B23 and drive wheel C24 rotate, and then realizes the gas production efficiency of natural gas, prevents the waste of natural gas.
With the above embodiments, the following functions can also be realized;
with reference to FIGS. 5 and 9, the implementation of the gas-liquid line leak prevention is described in detail:
two ejector pins 81 all rotate to be connected on gas-liquid pipe 51, carry out the bearing through the both ends to two ejector pins 81, guarantee two ejector pins 81's reliable rotation, two ejector pins 81 rotate the position department of connecting on gas-liquid pipe 51 and are provided with the rotation sealing washer, and it is sealed to realize two ejector pins 81 pivoted position departments, prevents that liquid from revealing.
Claims (10)
1. The utility model provides a natural gas well head gas production device which characterized in that: comprises a main pipe A (11) for gas production, two branch pipes (14) fixedly connected to the main pipe A (11), and two screw rods (31) rotating in the two branch pipes (14).
2. The natural gas wellhead gas production device according to claim 1, characterized in that: the device is characterized by further comprising a main shaft (21) which rotates on the main pipe A (11), a driving wheel A (22) which is fixedly connected onto the main shaft (21), two auxiliary frames (33) which are fixedly connected onto the two branch pipes (14), and two driven wheels A (32) which are fixedly connected onto the two spiral rods (31), wherein the two spiral rods (31) are respectively and rotatably connected onto the two auxiliary frames (33), and the two driven wheels A (32) are in meshing transmission with the driving wheel A (22).
3. The natural gas wellhead gas production device according to claim 2, characterized in that: and the main shaft (21) is also rotatably connected with an auxiliary wheel for assisting the two driven wheels A (32) to rotate stably.
4. A natural gas wellhead gas production device according to claim 2, characterized in that: the main shaft (21) is also fixedly connected with a double-helix blade.
5. The natural gas wellhead gas production device according to claim 4, characterized in that: still include driving wheel B (23) and driving wheel C (24) of rigid coupling on main shaft (21), and rotate and take over I (12) down on driving wheel B (23) and driving wheel C (24), and rotate and take over II (13) down at driving wheel C (24), and installation pipe (41) and gas-liquid pipe (51) on being responsible for A (11) of rigid coupling, it is all rigid couplings on gas-liquid pipe (51) that lower pipe I (12) and lower pipe II (13) down.
6. The natural gas wellhead gas production device according to claim 5, characterized in that: the device is characterized by further comprising two gas-liquid branch pipes (52) fixedly connected to the gas-liquid pipe (51), two cleaning grinding wheels (61) rotating on the two gas-liquid branch pipes (52), two driven wheels B (62) fixedly connected to the two cleaning grinding wheels (61), and two driven wheels B (62) are in meshing transmission with the driving wheels B (23).
7. The natural gas wellhead gas production device according to claim 6, characterized in that: the material pushing device is characterized by further comprising two gas outlet branch pipes (42) fixedly connected to the mounting pipe (41), two material pushing rods (81) rotating on the two gas outlet branch pipes (42), and two driven wheels C (82) fixedly connected to the two material pushing rods (81), wherein the two driven wheels C (82) are in meshing transmission with the driving wheels C (24).
8. A natural gas wellhead gas production device according to claim 7, characterized in that: the anti-blocking device further comprises an annular rack (71) which rotates in the lower connecting pipe I (12), an anti-blocking wheel (72) which is fixedly connected to the annular rack (71), and the annular rack (71) and the two driven wheels B (62) are in meshing transmission.
9. A natural gas wellhead gas production device according to claim 5, characterized in that: and sealing rings are arranged at the joints of the driving wheels B (23) and C (24).
10. A natural gas wellhead gas production device according to claim 8, characterized in that: the two material pushing rods (81) rotate on the gas-liquid pipe (51) and are provided with rotary sealing rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210400418.6A CN114737932A (en) | 2022-04-16 | 2022-04-16 | Natural gas well head gas production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210400418.6A CN114737932A (en) | 2022-04-16 | 2022-04-16 | Natural gas well head gas production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114737932A true CN114737932A (en) | 2022-07-12 |
Family
ID=82281227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210400418.6A Pending CN114737932A (en) | 2022-04-16 | 2022-04-16 | Natural gas well head gas production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114737932A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060245945A1 (en) * | 2005-04-14 | 2006-11-02 | Baker Hughes Incorporated | Crossover two-phase flow pump |
| US20120186807A1 (en) * | 2011-04-04 | 2012-07-26 | Douglas Ray Dickinson | Multi-Tasking Rod Guide |
| US20160356135A1 (en) * | 2014-02-19 | 2016-12-08 | Netzsch Pumpen & Systeme Gmbh | Pump System For Delivering Viscous Or Partially Viscous Media From A Borehole |
| CN107762478A (en) * | 2017-09-29 | 2018-03-06 | 黄乞珠 | A kind of nonpetroleum exploitation servicing unit for being capable of automatic impurity removing |
| US20180073317A1 (en) * | 2015-03-18 | 2018-03-15 | Qinterra Technologies As | Collecting Device And Method For Loosen And Collect Debris And A Well |
| CN207194876U (en) * | 2017-06-09 | 2018-04-06 | 肇庆市广应科通用航空研究院 | A kind of oil exploitation servicing unit |
| CN108005616A (en) * | 2018-01-15 | 2018-05-08 | 戴世斌 | A kind of oil exploitation efficient decimation device |
| CN108035698A (en) * | 2017-12-31 | 2018-05-15 | 黑龙江兰德超声科技股份有限公司 | A kind of oilfield exploitation device |
| CN110735625A (en) * | 2018-07-19 | 2020-01-31 | 中石化洛阳工程有限公司 | online desanding device for oil and gas pipeline without stopping transmission |
| CN110735626A (en) * | 2018-07-19 | 2020-01-31 | 中石化洛阳工程有限公司 | pipeline type natural gas sand removing device |
| CN211692356U (en) * | 2020-03-20 | 2020-10-16 | 山东省煤田地质局第四勘探队 | Anti-blocking system in drainage drilling hole |
| CN111852438A (en) * | 2020-08-09 | 2020-10-30 | 舒亮 | Oil well sand filtering device |
| CN212958568U (en) * | 2020-08-24 | 2021-04-13 | 天津紫源石油科技有限公司 | Oil development auxiliary assembly |
-
2022
- 2022-04-16 CN CN202210400418.6A patent/CN114737932A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060245945A1 (en) * | 2005-04-14 | 2006-11-02 | Baker Hughes Incorporated | Crossover two-phase flow pump |
| US20120186807A1 (en) * | 2011-04-04 | 2012-07-26 | Douglas Ray Dickinson | Multi-Tasking Rod Guide |
| US20160356135A1 (en) * | 2014-02-19 | 2016-12-08 | Netzsch Pumpen & Systeme Gmbh | Pump System For Delivering Viscous Or Partially Viscous Media From A Borehole |
| US20180073317A1 (en) * | 2015-03-18 | 2018-03-15 | Qinterra Technologies As | Collecting Device And Method For Loosen And Collect Debris And A Well |
| CN207194876U (en) * | 2017-06-09 | 2018-04-06 | 肇庆市广应科通用航空研究院 | A kind of oil exploitation servicing unit |
| CN107762478A (en) * | 2017-09-29 | 2018-03-06 | 黄乞珠 | A kind of nonpetroleum exploitation servicing unit for being capable of automatic impurity removing |
| CN108035698A (en) * | 2017-12-31 | 2018-05-15 | 黑龙江兰德超声科技股份有限公司 | A kind of oilfield exploitation device |
| CN108005616A (en) * | 2018-01-15 | 2018-05-08 | 戴世斌 | A kind of oil exploitation efficient decimation device |
| CN110735625A (en) * | 2018-07-19 | 2020-01-31 | 中石化洛阳工程有限公司 | online desanding device for oil and gas pipeline without stopping transmission |
| CN110735626A (en) * | 2018-07-19 | 2020-01-31 | 中石化洛阳工程有限公司 | pipeline type natural gas sand removing device |
| CN211692356U (en) * | 2020-03-20 | 2020-10-16 | 山东省煤田地质局第四勘探队 | Anti-blocking system in drainage drilling hole |
| CN111852438A (en) * | 2020-08-09 | 2020-10-30 | 舒亮 | Oil well sand filtering device |
| CN212958568U (en) * | 2020-08-24 | 2021-04-13 | 天津紫源石油科技有限公司 | Oil development auxiliary assembly |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20220712 |