CN217392380U - Reaction kettle device for producing petroleum additives - Google Patents

Reaction kettle device for producing petroleum additives Download PDF

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Publication number
CN217392380U
CN217392380U CN202220386275.3U CN202220386275U CN217392380U CN 217392380 U CN217392380 U CN 217392380U CN 202220386275 U CN202220386275 U CN 202220386275U CN 217392380 U CN217392380 U CN 217392380U
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China
Prior art keywords
pipe
fixedly connected
fixed
ring
reaction kettle
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CN202220386275.3U
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Chinese (zh)
Inventor
闫新庆
邵明洲
刘博�
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Shandong Directional Energy Technology Ltd By Share Ltd
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Shandong Directional Energy Technology Ltd By Share Ltd
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Abstract

The utility model discloses a petroleum auxiliary agent production reation kettle device, including the mount, mount top middle part is provided with the box, the inside dead eye that runs through that is provided with of pivot, lower part fixedly connected with fixed block in the dead eye, fixed block bottom fixedly connected with electric putter, electric putter runs through and sliding connection has the spacing ring in the bottom, the slider that has evenly distributed has been fixed in the spacing ring bottom outside, slider sliding connection is inside the spout, spout evenly distributed is in the fixed tube in the top upper portion outside. The utility model discloses in, can drive fixed pipe through electric putter and descend to make during production, can descend fixed pipe, thereby can realize stirring the material of bottom in the reation kettle, thereby can avoid the not thorough condition of material reaction of its bottom to take place, when the ejection of compact, can rise fixed pipe, thereby can avoid influencing its ejection of compact.

Description

Reaction kettle device for producing petroleum additives
Technical Field
The utility model relates to a reation kettle field especially relates to a petroleum auxiliary agent production reation kettle device.
Background
The petroleum additive is a gray yellow powder product which is formed by compounding a plurality of natural fibers, filling particles and additives which are treated by a special process according to a proper gradation and a certain process, after the product is added in a well, the product can play a good plugging effect on various seepage of a stratum under the action of a one-way pressure difference, the use is convenient, the compatibility is good, the slurry performance is not influenced, a reaction kettle is usually used when the petroleum additive is produced, the reaction kettle is a container with physical or chemical reaction under the broad understanding of the reaction kettle, and the heating, evaporation, cooling and low-high speed mixing functions required by the process are realized through the structural design and parameter configuration of the container.
At the in-process that uses petroleum auxiliary agent production reation kettle device, current petroleum auxiliary agent production reation kettle device often has three shortcoming when using in the existing market, firstly current petroleum auxiliary agent production reation kettle device is when using reloading to reation kettle, often need wash it, thereby avoid the influence of residual material to this batch of material last time, and current device cleaning performance is relatively poor, secondly current petroleum auxiliary agent production reation kettle device can not dry the cauldron body after the washing fast when using, make its work efficiency not high, thirdly current petroleum auxiliary agent production reation kettle device often sets up the discharge gate in the bottom when using, lead to stir the stick if too close to the discharge gate then can influence the ejection of compact, if too far away from the discharge gate then can not stir the material of reation kettle bottom.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a reaction kettle device for producing petroleum additives.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a reaction kettle device for producing petroleum additives comprises a fixing frame, wherein a box body is arranged in the middle of the top end of the fixing frame, a partition plate is fixedly connected with the upper middle part in the box body, an air heater is fixedly connected with the rear side of the middle part of the top end of the partition plate, the middle part of the front end of the air heater is fixedly connected with an air inlet pipe, one end of the air inlet pipe, far away from the air heater, penetrates through the partition plate and is communicated with a cleaning pipe and a water outlet pipe through an electric three-way valve, one end of the water outlet pipe, far away from the electric three-way valve, is communicated with a water tank, the water tank is arranged at the lower part in the box body, one end of the cleaning pipe, far away from the electric three-way valve, penetrates through a fixedly connected ring pipe of the box body, the ring pipe is arranged outside the middle part of the top end of the kettle body, the inner side of the ring pipe is communicated with a cavity through evenly distributed connecting pipes, a cavity is arranged outside the middle part of the top end of the inner part of the kettle body, the cavity is arranged outside a connecting ring, the connecting ring is arranged outside the top end of the rotating shaft, the top end of the rotating shaft is fixedly connected with a motor, the motor is arranged in the middle of the top end of the kettle body, through holes which are uniformly distributed penetrate through the side wall of the lower part of the cavity, the bottom end of the rotating shaft penetrates through the middle of the bottom end of the cavity, the periphery of the rotating shaft is not fixedly provided with fixing rings which are uniformly distributed, the periphery of the fixing rings is fixedly connected with stirring rods which are uniformly distributed, one ends of the stirring rods, far away from the fixing rings, are fixedly connected with cleaning brushes, penetrating hollow holes are formed in the rotating shaft, the lower part in the hollow holes is fixedly connected with fixing blocks, the bottom of the fixing blocks is fixedly connected with electric push rods, the bottom of the electric push rods is penetrated and slidably connected with limiting rings, the limiting rings are fixedly connected to the bottom in the hollow holes, sliders which are uniformly distributed are fixed outside the bottom of the limiting rings, and the sliders are slidably connected inside the sliding grooves, spout evenly distributed is in the fixed tube top upper portion outside, fixed pipe setting is in the pivot bottom, the stirring rod periphery cover of fixed pipe periphery is equipped with the washing cover, cauldron body top middle part front side is provided with the feed inlet, ring canal right side middle part fixedly connected with blast pipe, the one end fixedly connected with purification bucket of ring canal is kept away from to the blast pipe, be provided with the heated warehouses in the wall of cauldron body lower part.
As a further description of the above technical solution:
the cauldron body left side upper portion is provided with the intake pipe, the one end that the intake pipe is close to the cauldron body runs through cauldron external side intercommunication and has the heating bunker.
As a further description of the above technical solution:
the lower part of the right side of the kettle body is provided with an air outlet pipe, and one end of the air outlet pipe, which is close to the kettle body, penetrates through the outer side of the kettle body and is communicated with a heating bin.
As a further description of the above technical solution:
and one end of the exhaust pipe close to the purification barrel is provided with an electromagnetic valve.
As a further description of the above technical solution:
the purification barrel is arranged on the rear side of the right part of the kettle body.
As a further description of the above technical solution:
the fixing frame is arranged at the rear part of the left side of the kettle body.
As a further description of the above technical solution:
the ring pipe is arranged on the outer side of the top of the cavity.
As a further description of the above technical solution:
the bottom in the kettle body is provided with a discharge hole.
The utility model discloses following beneficial effect has:
1. the utility model discloses in, at first, can drive the pivot through the motor and rotate, in the outside of pivot, be fixed with the stirring rod through solid fixed ring, can stir the material through the stirring rod, one end at the stirring rod is fixed with the cleaning brush, make can wash reation kettle's inner wall through the cleaning brush when wasing, the stirring rod outside cover bottom the pivot is equipped with the washing cover simultaneously, electric putter through the inside bottom of pivot can drive fixed pipe and descend, thereby can wash reation kettle's bottom through the washing cover, thereby can be with reation kettle abluent more thoroughly, avoid remaining material to cause the influence to new material, thereby make it be favorable to batch processing.
2. The utility model discloses in, be provided with the water tank at the interior bottom of box, through the inside water of water tank, can wash reation kettle, upper portion is provided with the air heater simultaneously in the box, can produce hot-blastly through the air heater, can be with inside hot-blastly leading-in to reation kettle through air-supply line and scavenge pipe to accelerate the inside drying of reation kettle, make it waste time when can practicing thrift the wait, thereby can effectively improve work efficiency, be favorable to the mass production of type of production enterprise.
3. The utility model discloses in, there is electric putter at the interior bottom of pivot through the fixed block, can drive fixed pipe through electric putter and descend, thereby make when production, can descend fixed pipe, thereby can realize stirring the material of bottom in the reation kettle, thereby can avoid the incomplete condition of material reaction of its bottom to take place, be favorable to improving the utilization ratio of material, can effectively increase its reaction rate simultaneously, when the ejection of compact, can raise fixed pipe, thereby can avoid influencing its ejection of compact.
Drawings
FIG. 1 is a perspective view of a reaction kettle device for producing petroleum additives, which is provided by the utility model;
FIG. 2 is a top view of a reaction kettle device for producing petroleum additives, which is provided by the utility model;
FIG. 3 is a front view of a reaction kettle device for producing petroleum additives, which is provided by the utility model;
FIG. 4 is a top view of a reaction kettle device for producing petroleum additives, which is provided by the present invention;
FIG. 5 is a side view of the internal structure of the tank of the reaction kettle device for producing petroleum additives of the present invention;
FIG. 6 is a front view of the internal structure of a reaction kettle device for producing petroleum additives, which is provided by the utility model;
FIG. 7 is an enlarged view taken at A in FIG. 5;
fig. 8 is an enlarged view of fig. 6 at B.
Illustration of the drawings:
1. a fixed mount; 2. a box body; 3. cleaning the tube; 4. an air inlet pipe; 5. a kettle body; 6. a feed inlet; 7. a motor; 8. an air outlet pipe; 9. an exhaust pipe; 10. a purifying barrel; 11. a ring pipe; 12. an electromagnetic valve; 13. an electric three-way valve; 14. a hot air blower; 15. a partition plate; 16. a water tank; 17. an air inlet pipe; 18. a connecting ring; 19. a cavity; 20. a cavity; 21. a rotating shaft; 22. a through hole; 23. a connecting pipe; 24. a heating chamber; 25. cleaning the sleeve; 26. a fixing ring; 27. a stirring rod; 28. a void; 29. a fixed block; 30. a chute; 31. a fixed tube; 32. a slider; 33. a limiting ring; 34. an electric push rod; 35. a discharge port; 36. a water outlet pipe; 37. and (4) cleaning brushes.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. 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 the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, 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 as a specific case by those skilled in the art.
Referring to fig. 1-8, the present invention provides an embodiment: a reaction kettle device for producing petroleum additives comprises a fixed frame 1, a box body 2 is arranged in the middle of the top end of the fixed frame 1, a partition plate 15 is fixedly connected to the middle upper portion in the box body 2, a hot air blower 14 is fixedly connected to the rear side of the middle of the top end of the partition plate 15, an air inlet pipe 17 is fixedly connected to the middle of the front end of the hot air blower 14, one end, far away from the hot air blower 14, of the air inlet pipe 17 penetrates through the partition plate 15 and is communicated with a cleaning pipe 3 and a water outlet pipe 36 through an electric three-way valve 13, hot air can be generated through the hot air blower 14 and can be guided into the reaction kettle through the air inlet pipe 17 and the cleaning pipe 3, so that drying inside the reaction kettle is accelerated, time wasted when waiting for the drying can be saved, one end, far away from the electric three-way valve 13, of the water outlet pipe 36 is communicated with a water tank 16, the air inlet pipe 17 can be closed when the water tank 16 is discharged through the electric three-way valve 13, the water outlet pipe 36 is closed when the hot air blower 14 is discharged, the reaction kettle can be cleaned by water in the water tank 16, the water tank 16 is arranged at the inner lower part of the box body 2, one end of the cleaning pipe 3 far away from the electric three-way valve 13 penetrates through the box body 2 and is fixedly connected with a ring pipe 11, the ring pipe 11 is arranged at the outer side of the middle part of the top end of the kettle body 5, the inner side of the ring pipe 11 is communicated with a cavity 19 through a connecting pipe 23 which is uniformly distributed, a cavity 20 is arranged at the outer side of the middle part of the top end of the kettle body 5, the inner top of the cavity 20 is provided with a cavity 19, the cavity 19 is arranged at the outer side of a connecting ring 18, the connecting ring 18 is arranged at the outer side of the top end of a rotating shaft 21, the top end of the rotating shaft 21 is fixedly connected with a motor 7, the motor 7 can drive the rotating shaft 21 to rotate, through holes 22 which are uniformly distributed penetrate through the side wall of the lower part of the cavity 20, the bottom end of the rotating shaft 21 penetrates through the middle part of the bottom end of the cavity 20, the periphery of the rotating shaft 21 is not fixed with a fixing ring 26 which is uniformly distributed, the periphery of the fixing ring 26 is fixedly connected with uniformly distributed stirring rods 27, materials can be stirred through the stirring rods 27, one end of each stirring rod 27, which is far away from the fixing ring 26, is fixedly connected with a cleaning brush 37, so that the inner wall of the reaction kettle can be cleaned through the cleaning brush 37 during cleaning, a through hollow hole 28 is formed in the rotating shaft 21, a fixed block 29 is fixedly connected with the inner lower part of the hollow hole 28, the bottom of the fixed block 29 is fixedly connected with an electric push rod 34, the bottom of the electric push rod 34 is through and slidably connected with a limit ring 33, the limit ring 33 is fixedly connected with the inner bottom of the hollow hole 28, the electric push rod 34 can be limited through the limit ring 33, so that the reaction kettle is stable during operation, the sliding blocks 32 with uniform distribution are fixed on the outer side of the bottom of the limit ring 33, the sliding blocks 32 are slidably connected inside the sliding grooves 30, and the sliding grooves 30 are uniformly distributed on the outer side of the upper part of the top end in the fixing tube 31, the fixed pipe 31 can be guided and limited when the fixed pipe 31 is lifted and rotated through the slide block 32 and the slide groove 30, the fixed pipe 31 can be driven to descend through the electric push rod 34, so that the fixed pipe 31 can be lowered during production, so that the materials at the bottom in the reaction kettle can be stirred, the fixed pipe 31 is arranged at the bottom of the rotating shaft 21, the outer periphery of the stirring rod 27 at the periphery of the fixed pipe 31 is sleeved with the cleaning sleeve 25, the electric push rod 34 at the inner bottom end of the rotating shaft 21 can drive the fixed pipe 31 to descend, so that the bottom of the reaction kettle can be cleaned through the cleaning sleeve 25, so that the reaction kettle can be cleaned more thoroughly, the front side of the middle part at the top end of the kettle body 5 is provided with the feeding hole 6, the middle part at the right side of the ring pipe 11 is fixedly connected with the exhaust pipe 9, one end of the exhaust pipe 9, far away from the ring pipe 11, is fixedly connected with the purification barrel 10, waste gas generated during reaction can be generated through the through hole 22 and the cavity 19 on the cavity 20, can be led into in blast pipe 9 through connecting pipe 23 to get into purification bucket 10 and purify waste gas, be provided with heating chamber 24 in the cauldron body 5 lower part wall.
An air inlet pipe 4 is arranged at the upper part of the left side of the kettle body 5, one end of the air inlet pipe 4 close to the kettle body 5 penetrates through the outer side of the kettle body 5 and is communicated with a heating bin 24, an air outlet pipe 8 is arranged at the lower part of the right side of the kettle body 5, one end of the air outlet pipe 8 close to the kettle body 5 penetrates through the outer side of the kettle body 5 and is communicated with the heating bin 24, hot steam can be discharged into the heating chamber 24 through the inlet pipe 4 and the outlet pipe 8 for circulation, the materials are heated so as to accelerate the reaction, one end of the exhaust pipe 9 close to the purifying barrel 10 is provided with an electromagnetic valve 12, the electromagnetic valve 12 can prevent hot air in the water area from entering the purifying barrel 10, the purifying barrel 10 is arranged at the rear side of the right part of the kettle body 5, can purify waste gas through purifying barrel 10, mount 1 sets up at 5 left sides rear portions of the cauldron body, and ring pipe 11 sets up in the 20 top outsides of cavity, and the bottom is provided with discharge gate 35 in the cauldron body 5, can carry out the ejection of compact through discharge gate 35.
The working principle is as follows: firstly, the rotating shaft 21 can be driven to rotate by the motor 7, the stirring rod 27 is fixed outside the rotating shaft 21 by the fixing ring 26, the materials can be stirred by the stirring rod 27, the cleaning brush 37 is fixed at one end of the stirring rod 27, so that the inner wall of the reaction kettle can be cleaned by the cleaning brush 37 during cleaning, the cleaning sleeve 25 is sleeved outside the stirring rod 27 at the bottom of the rotating shaft 21, the fixing pipe 31 can be driven to descend by the electric push rod 34 at the bottom end inside the rotating shaft 21, so that the bottom of the reaction kettle can be cleaned by the cleaning sleeve 25, the reaction kettle can be cleaned more thoroughly, the influence of residual materials on new materials is avoided, the new materials are beneficial to batch processing, the water tank 16 is arranged at the inner bottom of the box body 2, the reaction kettle can be cleaned by water inside the water tank 16, and the air heater 14 is arranged at the upper part inside the box body 2, can produce hot-blastly through air heater 14, can be inside leading-in reation kettle with hot-blastly through air-supply line 17 and scavenge pipe 3, thereby accelerate the inside drying of reation kettle, make it can practice thrift the time of wasting when waiting, thereby can effectively improve work efficiency, be favorable to the mass production of production type enterprise, simultaneously can drive fixed pipe 31 through electric putter 34 and descend, thereby make when production, can fall fixed pipe 31, thereby can realize stirring the material of bottom in the reation kettle, thereby can avoid the not thorough condition of material reaction of its bottom to take place, be favorable to improving the utilization ratio of material, simultaneously can effectively increase its reaction rate, when the ejection of compact, can rise fixed pipe 31, thereby can avoid influencing its ejection of compact.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (8)

1. The utility model provides a petroleum auxiliary agent production reation kettle device, includes mount (1), its characterized in that: the cleaning device is characterized in that a box body (2) is arranged in the middle of the top end of the fixing frame (1), a partition plate (15) is fixedly connected to the middle upper portion in the box body (2), an air heater (14) is fixedly connected to the rear side of the middle portion of the top end of the partition plate (15), an air inlet pipe (17) is fixedly connected to the middle portion of the front end of the air heater (14), one end, away from the air heater (14), of the air inlet pipe (17) penetrates through the partition plate (15) and is communicated with a cleaning pipe (3) and a water outlet pipe (36) through an electric three-way valve (13), one end, away from the electric three-way valve (13), of the water outlet pipe (36) is communicated with a water tank (16), the water tank (16) is arranged at the inner lower portion of the box body (2), one end, away from the electric three-way valve (13), of the cleaning pipe (3) penetrates through the box body (2) and is fixedly connected with a ring pipe (11), the ring pipe (11) is arranged outside the middle portion of the top end of the kettle body (5), the utility model discloses a kettle, including ring canal (11), connecting pipe (23) the inboard of ring canal (11) through evenly distributed communicates there is cavity (19), the top middle part outside is provided with cavity (20) in the cauldron body (5), the inside top of cavity (20) is provided with cavity (19), cavity (19) set up in the go-between (18) outside, go-between (18) set up in pivot (21) top outside, pivot (21) top fixedly connected with motor (7), motor (7) set up in cauldron body (5) top middle part, cavity (20) lower part lateral wall runs through evenly distributed's through-hole (22), cavity (20) bottom middle part is run through to pivot (21) bottom, pivot (21) periphery is not being fixed solid fixed ring (26) that have evenly distributed, gu fixed ring (26) periphery fixedly connected with evenly distributed's stirring rod (27), the equal fixedly connected with cleaning brush (37) of one end that solid fixed ring (26) was kept away from to stirring rod (27), the inside dead hole (28) that runs through that is provided with of pivot (21), lower part fixedly connected with fixed block (29) in dead hole (28), fixed block (29) bottom fixedly connected with electric putter (34), electric putter (34) bottom runs through and sliding connection has spacing ring (33), spacing ring (33) fixed connection is bottom in dead hole (28), slider (32) that have evenly distributed has been fixed in the spacing ring (33) bottom outside, slider (32) sliding connection is inside spout (30), spout (30) evenly distributed is in fixed pipe (31) top upper portion outside, fixed pipe (31) set up in pivot (21) bottom, stirring rod (27) periphery cover of fixed pipe (31) periphery is equipped with washs cover (25), the cauldron body (5) top middle part front side is provided with feed inlet (6), the improved reaction kettle is characterized in that an exhaust pipe (9) is fixedly connected to the middle of the right side of the ring pipe (11), one end of the exhaust pipe (9) far away from the ring pipe (11) is fixedly connected with a purification barrel (10), and a heating bin (24) is arranged in the wall of the lower portion of the kettle body (5).
2. The reaction kettle device for producing petroleum additives according to claim 1, wherein: cauldron body (5) left side upper portion is provided with intake pipe (4), the one end that intake pipe (4) are close to cauldron body (5) runs through cauldron body (5) outside intercommunication and has heated warehouses (24).
3. The reaction kettle device for producing petroleum additives according to claim 1, wherein: the lower part of the right side of the kettle body (5) is provided with an air outlet pipe (8), and one end of the air outlet pipe (8) close to the kettle body (5) penetrates through the outer side of the kettle body (5) and is communicated with a heating bin (24).
4. The reaction kettle device for producing petroleum additives according to claim 1, wherein: and an electromagnetic valve (12) is arranged at one end of the exhaust pipe (9) close to the purification barrel (10).
5. The reaction kettle device for producing petroleum additives according to claim 1, wherein: the purification barrel (10) is arranged on the rear side of the right part of the kettle body (5).
6. The reaction kettle device for producing petroleum additives according to claim 1, wherein: the fixing frame (1) is arranged at the rear part of the left side of the kettle body (5).
7. The reaction kettle device for producing petroleum additives according to claim 1, wherein: the ring pipe (11) is arranged on the outer side of the top of the cavity (20).
8. The reaction kettle device for producing petroleum additives according to claim 1, wherein: and a discharge hole (35) is formed in the bottom in the kettle body (5).
CN202220386275.3U 2022-02-24 2022-02-24 Reaction kettle device for producing petroleum additives Active CN217392380U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220386275.3U CN217392380U (en) 2022-02-24 2022-02-24 Reaction kettle device for producing petroleum additives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220386275.3U CN217392380U (en) 2022-02-24 2022-02-24 Reaction kettle device for producing petroleum additives

Publications (1)

Publication Number Publication Date
CN217392380U true CN217392380U (en) 2022-09-09

Family

ID=83137172

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220386275.3U Active CN217392380U (en) 2022-02-24 2022-02-24 Reaction kettle device for producing petroleum additives

Country Status (1)

Country Link
CN (1) CN217392380U (en)

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Date Code Title Description
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: A reaction kettle device for production of petroleum additives

Effective date of registration: 20221031

Granted publication date: 20220909

Pledgee: Dongying rural commercial bank Limited by Share Ltd. Dongcheng sub branch

Pledgor: SHANDONG DIRECTIONAL ENERGY TECHNOLOGY LIMITED BY SHARE LTD.

Registration number: Y2022980020358

PE01 Entry into force of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20231019

Granted publication date: 20220909

Pledgee: Dongying rural commercial bank Limited by Share Ltd. Dongcheng sub branch

Pledgor: SHANDONG DIRECTIONAL ENERGY TECHNOLOGY LIMITED BY SHARE LTD.

Registration number: Y2022980020358

PC01 Cancellation of the registration of the contract for pledge of patent right