CN210656629U - Sludge filtering device for oil exploitation - Google Patents
Sludge filtering device for oil exploitation Download PDFInfo
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- CN210656629U CN210656629U CN201920850517.8U CN201920850517U CN210656629U CN 210656629 U CN210656629 U CN 210656629U CN 201920850517 U CN201920850517 U CN 201920850517U CN 210656629 U CN210656629 U CN 210656629U
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- treatment box
- stirring shafts
- rotating shaft
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- 239000010802 sludge Substances 0.000 title claims abstract description 60
- 238000001914 filtration Methods 0.000 title claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003814 drug Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 19
- 238000000605 extraction Methods 0.000 claims description 16
- 206010024796 Logorrhoea Diseases 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 4
- 241000220317 Rosa Species 0.000 claims 3
- 239000003921 oil Substances 0.000 abstract description 17
- 239000000203 mixture Substances 0.000 abstract description 12
- 239000010779 crude oil Substances 0.000 abstract description 11
- 238000000926 separation method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 9
- 230000002349 favourable effect Effects 0.000 description 7
- 239000011499 joint compound Substances 0.000 description 7
- 239000006228 supernatant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 241000561734 Celosia cristata Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model discloses a sludge filtering device for oil exploitation, which belongs to the field of oil field sludge treatment, and comprises a treatment box, wherein the top end of the treatment box is provided with a liquid inlet, both sides of the liquid inlet are respectively provided with a water inlet pipe and a medicament pipe in a penetrating way, a sludge pipe is arranged on one side wall of the treatment box close to the lower end in a penetrating way, a rotating shaft is rotatably connected between the relative inner walls of the treatment box close to the middle part, the outer side wall of the treatment box is fixedly provided with a rotating motor for driving the rotating shaft, the upper and lower side walls of the rotating shaft are fixedly provided with a plurality of stirring shafts, the stirring shafts are provided with a plurality of vibration crushing mechanisms, the bottom of the treatment box is provided with a drain pipe, a valve plate is arranged in the drain pipe, and through the matching of the stirring shafts and the plurality of vibration crushing mechanisms, the sludge mixture in the, effectively improves the separation rate of the crude oil to a certain extent.
Description
Technical Field
The utility model relates to an oil field sludge treatment field, more specifically say, relate to a sludge filtration device of oil development.
Background
The oil field refers to a specific area for crude oil production, certain water is required for sludge treatment in oil field exploitation, a large amount of oily sludge is inevitably generated in the oil field during exploration, development, storage and transportation, and untreated oil cannot be used.
Through retrieval, Chinese patent No. CN207108787U discloses a sludge treatment device for petroleum exploitation, which mainly comprises a sludge precipitation treatment tank, wherein the upper end of the sludge precipitation treatment tank is opened, and a stirring device is arranged in the sludge precipitation treatment tank; the bottom of the sludge precipitation treatment tank is provided with a welding machine with a support leg, and the sludge precipitation treatment tank is suspended by the support leg; the upper end open position of sludge sedimentation treatment jar is equipped with inlet tube, medicament pipe and sludge pipe, advances water piping connection on the delivery port of water tank, sends into sludge sedimentation treatment jar in clear water, medicament and mud according to the ratio respectively through inlet tube, medicament pipe and sludge pipe, then utilizes agitating unit to realize mixing stirring.
Among the contrast file, stir the inside sludge mixture of sludge sedimentation processing jar through agitating unit, and agitating unit only comprises an impeller, is unfavorable for carrying out broken handle to the coagulum in the sludge mixture, and the stirring mixing effect is relatively poor, causes the filter effect relatively poor, and sludge sedimentation processing jar is a rectangle structure, and agitating unit sets up the bottom position at sludge sedimentation processing jar with the connection structure that quick-witted case etc. formed, the smooth and easy discharge of sludge sediment of not being convenient for.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
To the problem that exists among the prior art, the utility model aims to provide a sludge filtration device of oil development through (mixing) shaft and a plurality of garrulous mechanism's that shakes cooperation, has realized carrying out intensive mixing to the sludge mixture who handles the incasement and has mixed for suspension intensive separation in crude oil and the mud has effectively improved the separation rate of crude oil to a certain extent.
2. Technical scheme
In order to solve the above problems, the utility model adopts the following technical proposal.
A sludge filtering device for oil exploitation comprises a treatment box, wherein a liquid inlet is arranged at the top end of the treatment box, a water inlet pipe and a medicament pipe are respectively arranged on two sides of the liquid inlet in a penetrating manner, a sludge pipe is arranged on one side wall of the treatment box close to the lower end in a penetrating manner, a rotating shaft is rotatably connected between opposite inner walls of the treatment box close to the middle part, a rotating motor for driving the rotating shaft is fixedly arranged on the outer side wall of the treatment box, two groups of stirring shafts are respectively and fixedly arranged on the upper side wall and the lower side wall of the rotating shaft, a plurality of vibration and fragmentation mechanisms are arranged on the stirring shafts, a drain pipe is arranged at the bottom of the treatment box, a valve plate is arranged in the drain pipe, an extraction pipe communicated with the interior of the treatment box penetrates through the outer side wall of the treatment box close to the upper end, the filter box is located the below of extraction pipe, and the lower extreme of filter box is connected with oil water separator through the connecting pipe, through the (mixing) shaft with a plurality of cooperation of garrulous mechanism that shakes, has realized carrying out intensive mixing to the sludge mixture of handling the incasement for suspension intensive separation in crude oil and the mud has effectively improved the separation rate of crude oil to a certain extent.
Furthermore, one group of stirring shafts are symmetrically distributed on the side walls of two ends of one side of the rotating shaft, the number of the stirring shafts is two, and the other group of stirring shafts are symmetrically distributed on the side walls of two ends of the other side of the rotating shaft, and the number of the stirring shafts is four.
Further, garrulous mechanism shakes includes equidistant fixed connection a plurality of vibrating spring on the (mixing) shaft lateral wall, vibrating spring keeps away from the one end fixedly connected with balancing weight of (mixing) shaft, sets up the vibrating spring that can make a round trip to vibrate, is favorable to shaking garrulous to the coagulum in the mud.
Furthermore, a plurality of broken pieces are fixedly connected to the side walls of the two sides of the stirring shaft, broken teeth are formed in the side walls of the broken pieces, the edges of the side walls of the broken pieces are of a saw-toothed structure, and the sludge breaking degree is further improved.
Further, handle equal fixedly connected with toper guide plate on the upper and lower both sides lateral wall of case, the toper guide plate will handle incasement portion and constitute the rhombus structure, and the upper end of blow off pipe links up with the bottom of toper guide plate mutually, is favorable to avoiding the sludge mixture to adhere in four contained angle departments of handling the case in the stirring process on the one hand, and on the other hand is favorable to the sludge deposit thing discharge to handle outside the case.
Furthermore, the filter mechanism includes the first filter screen that is located the top and the second filter screen that is located the below, the lower extreme both sides of first filter screen are respectively through the upper end both sides fixed connection of connecting plate with the second filter screen, set up two filter screens of upper and lower position, have improved the filter effect of supernatant.
3. Advantageous effects
Compared with the prior art, the utility model has the advantages of:
(1) this scheme has realized carrying out the intensive mixing to the sludge mixture of handling the incasement through the (mixing) shaft and the cooperation of a plurality of garrulous mechanisms that shake for suspension intensive separation in crude oil and the mud has effectively improved the separation rate of crude oil to a certain extent.
(2) One group of stirring shafts are symmetrically distributed on the side walls of two ends of one side of the rotating shaft, and the number of the stirring shafts is two, and the other group of stirring shafts are symmetrically distributed on the side walls of two ends of the other side of the rotating shaft, and the number of the stirring shafts is four.
(3) Garrulous mechanism shakes includes equidistant fixed connection a plurality of vibrating spring on the (mixing) shaft lateral wall, and vibrating spring keeps away from the one end fixedly connected with balancing weight of (mixing) shaft, sets up the vibrating spring that can make a round trip the vibration, is favorable to shaking garrulous to the coagulum in the mud.
(4) The side walls of the two sides of the stirring shaft are fixedly connected with a plurality of broken blocks, broken teeth are arranged on the side walls of the broken blocks, the edges of the side walls of the broken blocks are of a saw-toothed structure, and the sludge breaking degree is further improved.
(5) Handle equal fixedly connected with toper guide plate on the upper and lower both sides lateral wall of case, the toper guide plate will handle incasement portion and constitute the rhombus structure, and the upper end of blow off pipe links up with the bottom of toper guide plate mutually, is favorable to avoiding the sludge mixture to adhere in four contained angle departments of handling the case at the stirring in-process on the one hand, and on the other hand is favorable to the sludge deposit thing discharge to handle outside the case.
(6) The filtering mechanism comprises a first filter screen positioned above and a second filter screen positioned below, the two sides of the lower end of the first filter screen are fixedly connected with the two sides of the upper end of the second filter screen through a connecting plate respectively, and the two filter screens at the upper and lower positions are arranged, so that the filtering effect of the supernatant is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the stirring shaft of the present invention;
fig. 3 is a schematic perspective view of the filtering mechanism of the present invention;
fig. 4 is a schematic diagram of the external structure of the present invention.
The reference numbers in the figures illustrate:
1 treatment box, 2 liquid inlets, 3 water inlet pipes, 4 medicament pipes, 5 sludge pipes, 6 rotating shafts, 7 rotating motors, 8 stirring shafts, 9 vibration springs, 10 balancing weights, 11 broken pieces, 12 broken teeth, 13 conical guide plates, 14 blow-off pipes, 15 valve plates, 16 extraction pipes, 17 water pumps, 18 filter boxes, 19 oil-water separators, 20 filter mechanisms, 21 first filter screens, 22 second filter screens and 23 connecting plates.
Detailed Description
The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the present invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all belong to the protection scope of the utility model.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1, a sludge filtering device for oil extraction comprises a processing box 1, wherein a liquid inlet 2 is arranged at the top end of the processing box 1, a water inlet pipe 3 and a medicament pipe 4 are respectively arranged at two sides of the liquid inlet 2 in a penetrating manner, a sludge pipe 5 is arranged on the side wall of the processing box 1 close to the lower end in a penetrating manner, a rotating shaft 6 is rotatably connected between the opposite inner walls of the processing box 1 close to the middle part, a rotating motor 7 for driving the rotating shaft 6 is fixedly arranged on the outer side wall of the processing box 1, the rotating motor 7 is electrically connected with an external power supply, and is installed by a proper rotating motor 7 by technicians in the field, such as Y801-2, two groups of stirring shafts 8 are respectively and fixedly arranged on the upper and lower side walls of the rotating shaft 6, one group of the stirring shafts 8 are symmetrically distributed on the side walls at two ends of one side of the rotating, and the number of the stirring shafts is four, the stirring shafts arranged up and down are connected in a staggered way, as shown in figure 1, which is beneficial to full stirring.
Please refer to fig. 2, be equipped with a plurality of garrulous mechanisms that vibrate on (mixing) shaft 8, it is concrete, the garrulous mechanism that vibrates includes a plurality of vibrating spring 9 of equidistant fixed connection on (mixing) shaft 8 lateral wall, vibrating spring 9 keeps away from the one end fixedly connected with balancing weight 10 of (mixing) shaft 8, set up vibrating spring 9 that can make a round trip the vibration, be favorable to vibrating the bits of coagulation in the mud garrulous, furthermore, in order to further improve the stirring mixed degree, a plurality of broken pieces 11 of fixedly connected with on the lateral wall of (mixing) shaft 8 both sides, broken tooth 12 has been seted up on broken piece 11's the lateral wall, and broken piece 11's lateral wall edge is the cockscomb.
Please refer to fig. 1 and 4, a drain pipe 14 is disposed at the bottom of the treatment tank 1, a valve plate 15 is disposed in the drain pipe 14, tapered guide plates 13 are fixedly connected to the upper and lower side walls of the treatment tank 1, the tapered guide plates 13 form a diamond structure inside the treatment tank 1, and the upper end of the drain pipe 14 is connected to the bottom end of the tapered guide plates 13, on one hand, a large area of sludge mixture is effectively prevented from adhering to four corners of the treatment tank 1 during the stirring process, on the other hand, sludge precipitates are discharged out of the treatment tank 1, and meanwhile, in order to clean the inside of the treatment tank 1, a sealing plate can be disposed on the outer side wall of the treatment tank 1.
It has and handles the inside extraction pipe 16 that communicates of case 1 to run through on the lateral wall that handles case 1 and be close to the upper end, be equipped with suction pump 17 on the extraction pipe 16, it has filter box 18 of filter mechanism 20 to handle fixed mounting on the lateral wall of case 1, filter box 18 can place in the backup pad with handling case 1 lateral wall fixed connection, be convenient for demolish, filter box 18 is located extraction pipe 16's below, in order to improve the filter effect, can connect the shower nozzle in extraction pump 16's outer end, the shower nozzle is located filter box 18's top, and filter box 18's lower extreme is connected with oil water separator 19 through the connecting pipe, oil water separator 19 carries out oil water separation to the supernatant after filtering.
Referring to fig. 3, specifically, the filtering mechanism 20 includes a first filter screen 21 located above and a second filter screen 22 located below, both sides of the lower end of the first filter screen 21 are respectively fixedly connected to both sides of the upper end of the second filter screen 22 through a connecting plate 23, two filter screens are arranged at upper and lower positions, the filtering effect of the supernatant is improved, in order to facilitate installation of the filtering mechanism 20, bearing plates for supporting the second filter screen 22 can be fixedly connected to the side walls of both sides of the filtering box 20, the first filter screen 21 and the second filter screen 22 are placed in the filtering box 18, both sides of the lower end of the second filter screen 22 are lapped on the bearing plates, and the filtering mechanism is convenient to detach and clean.
Compared with the reference file, when the device in the application document is used, a proper amount of sludge is guided into the treatment box 1 through the sludge pipe 5, clear water and medicaments are respectively guided into the treatment box 1 through the water inlet pipe 3 and the medicament pipe 4, and are matched with the sludge, the rotating motor 7 is started, the rotating motor 7 drives the rotating shaft 6 to rotate, the rotating shaft 6 drives the stirring shafts 8 on the side walls of the rotating shaft 6 to rotate, the stirring shafts 8 stir the sludge mixture in the treatment box 1, because the stirring shafts 8 are provided with a plurality of vibrating springs 9 which are distributed at equal intervals in a crossed manner, and the outer ends of the vibrating springs 9 are connected with the balancing weights 10, in the rotating process of the stirring shafts 8, the vibrating springs 9 can vibrate back and forth under the action of rotating force and the gravity of the balancing weights 10, so as to be beneficial to carrying out sufficient vibration and crushing on the sludge in the treatment box 1, and the matching structure of the fragment 11 and the crushing, further improving the crushing effect of the sludge and being beneficial to fully mixing the medicament and the sludge mixture;
after the mixture is fully stirred, the rotating motor 7 is turned off, suspended matters in the sludge are precipitated under the treatment effect of the medicament, crude oil in the sludge is floated on the surface of clear water, the crude oil is extracted, the supernatant is extracted by the extraction pipe 16 under the action of the water suction pump 17, larger particles in oil and water are filtered by the first filter screen 21 and the second filter screen 22 in the filter box 18, and finally the filtered supernatant is separated by the oil-water separator 19 to obtain crude oil with higher concentration;
the sediment in the treatment tank 1 can be discharged through the sewage discharge pipe 14 so as to be treated again later, and in the process, the sediment can be pumped after being communicated with the sewage discharge pipe 14 through an external sludge pump, which is the prior art and is not described herein in detail.
The above; is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; according to the technical scheme of the utility model and the improvement conception, equivalent substitution or change is carried out; are all covered by the protection scope of the utility model.
Claims (6)
1. The utility model provides a sludge filtration device of oil development, is including handling case (1), its characterized in that: the treatment device is characterized in that a liquid inlet (2) is arranged at the top end of the treatment box (1), a water inlet pipe (3) and a medicament pipe (4) are respectively arranged on two sides of the liquid inlet (2) in a penetrating manner, a sludge pipe (5) is arranged on one side wall of the treatment box (1) close to the lower end in a penetrating manner, a rotating shaft (6) is rotatably connected between the relative inner walls of the treatment box (1) close to the middle part, a rotating motor (7) for driving the rotating shaft (6) is fixedly arranged on the outer side wall of the treatment box (1), two groups of stirring shafts (8) are respectively and fixedly arranged on the upper side wall and the lower side wall of the rotating shaft (6), a plurality of vibrating and smashing mechanisms are arranged on the stirring shafts (8), a sewage discharge pipe (14) is arranged at the bottom of the treatment box (1), a valve plate (15) is arranged in the sewage discharge pipe (14), an, be equipped with suction pump (17) on extraction pipe (16), fixed mounting has rose box (18) that have filter mechanism (20) on the lateral wall of handling case (1), rose box (18) are located the below of extraction pipe (16), and the lower extreme of rose box (18) is connected with oil water separator (19) through the connecting pipe.
2. The sludge filtering apparatus for oil extraction as set forth in claim 1, wherein: one group of the stirring shafts (8) are symmetrically distributed on the side walls of two ends of one side of the rotating shaft (6), the number of the stirring shafts is two, the other group of the stirring shafts (8) are symmetrically distributed on the side walls of two ends of the other side of the rotating shaft (6), and the number of the stirring shafts is four.
3. The sludge filtering apparatus for oil extraction as set forth in claim 2, wherein: garrulous mechanism shakes includes equidistant fixed connection a plurality of vibrating spring (9) on (mixing) shaft (8) lateral wall, vibrating spring (9) keep away from one end fixedly connected with balancing weight (10) of (mixing) shaft (8).
4. The sludge filtering apparatus for oil extraction as set forth in claim 3, wherein: the stirring shaft (8) is characterized in that a plurality of broken pieces (11) are fixedly connected to the side walls of the two sides of the stirring shaft, broken teeth (12) are arranged on the side walls of the broken pieces (11), and the edges of the side walls of the broken pieces (11) are of a sawtooth-shaped structure.
5. The sludge filtering apparatus for oil extraction as set forth in claim 1, wherein: handle equal fixedly connected with toper guide plate (13) on the upper and lower both sides lateral wall of case (1), toper guide plate (13) will handle case (1) inside constitution rhombus structure, and the upper end of blow off pipe (14) links up with the bottom of toper guide plate (13) mutually.
6. The sludge filtering apparatus for oil extraction as set forth in claim 1, wherein: the filter mechanism (20) comprises a first filter screen (21) located above and a second filter screen (22) located below, and the two sides of the lower end of the first filter screen (21) are fixedly connected with the two sides of the upper end of the second filter screen (22) through connecting plates (23) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920850517.8U CN210656629U (en) | 2019-06-06 | 2019-06-06 | Sludge filtering device for oil exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920850517.8U CN210656629U (en) | 2019-06-06 | 2019-06-06 | Sludge filtering device for oil exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210656629U true CN210656629U (en) | 2020-06-02 |
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ID=70840078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920850517.8U Active CN210656629U (en) | 2019-06-06 | 2019-06-06 | Sludge filtering device for oil exploitation |
Country Status (1)
| Country | Link |
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| CN (1) | CN210656629U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149381A (en) * | 2021-04-19 | 2021-07-23 | 辽宁兴东科技有限公司 | Sludge solid waste treatment device |
-
2019
- 2019-06-06 CN CN201920850517.8U patent/CN210656629U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113149381A (en) * | 2021-04-19 | 2021-07-23 | 辽宁兴东科技有限公司 | Sludge solid waste treatment device |
| CN113149381B (en) * | 2021-04-19 | 2023-11-21 | 辽宁兴东科技有限公司 | Sludge solid waste treatment device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220322 Address after: 618399 south section 3, Zhongshan Avenue, Guanghan City, Deyang City, Sichuan Province Patentee after: CHINA NATIONAL PETROLEUM CORPORATION, SOUTHWEST OIL & GASFIELD BRANCH, ENGINEERING TECHNOLOGY Research Institute Address before: 618300 south section 3, Zhongshan Avenue, Guanghan City, Deyang City, Sichuan Province Patentee before: CHINA NATIONAL PETROLEUM CORPORATION, SOUTHWEST OIL & GASFIELD BRANCH, ENGINEERING TECHNOLOGY Research Institute Patentee before: SICHUAN SHENGNUO OIL. AND GAS ENGINEERING TECHNOLOGY SERVICE Co.,Ltd. |
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| TR01 | Transfer of patent right |