CN212790791U - Movable dry mixing pry - Google Patents
Movable dry mixing pry Download PDFInfo
- Publication number
- CN212790791U CN212790791U CN202020967145.XU CN202020967145U CN212790791U CN 212790791 U CN212790791 U CN 212790791U CN 202020967145 U CN202020967145 U CN 202020967145U CN 212790791 U CN212790791 U CN 212790791U
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- mixing tank
- tank
- primary mixing
- air inlet
- batch mixing
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- 238000007580 dry-mixing Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 138
- 239000000428 dust Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000003814 drug Substances 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 230000003993 interaction Effects 0.000 claims description 7
- 229940079593 drug Drugs 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000002000 scavenging effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 238000005303 weighing Methods 0.000 description 6
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of oilfield equipment, in particular to a movable dry mixing pry, which comprises a pry seat, a metering tank, a primary mixing tank, a batch mixing tank, a dust removal tank and an air compressor; the metering tank, the primary mixing tank, the batch mixing tank and the air compressor are all arranged on the prying seat; the air compressor is positioned at one end part of the upper surface of the prying seat; the upper part of the metering tank is provided with a bag breaking device; the upper parts of the primary mixing tank and the batch mixing tank are respectively provided with a dust removal tank; the primary mixing tank is respectively connected with the metering tank and the batch mixing tank through a material manifold system; one side of the metering tank is provided with an air source distributor a, one side of the primary mixing tank is provided with an air source distributor b, one path of the air source distributor a is connected with the air source distributor b through a control pipeline, the other path of the air source distributor a is communicated with the metering tank to provide compressed air for the metering tank, and the air source distributor b is communicated with the primary mixing tank and the batch mixing tank through an air inlet pipeline; the utility model discloses be convenient for bulk cargo storage, the broken convenient and fast of medicine in bags have avoided dust pollution simultaneously, make the thoughtlessly mix of material and medicine more even.
Description
Technical Field
The utility model relates to an oil field equipment technical field specifically relates to a portable sled that mixes futilely, especially an oil field well cementation bulk cargo is mixed futilely and is used portable sled that mixes futilely.
Background
The main function of oil well cement dry mixing is to add various drug additives into the well cement according to the oil well geological condition before the well cementation of the oil field. However, the existing cement dry mixing station is basically fixed, and for a long-distance well cementation site, phenomena such as hardening, layering and the like are easy to generate in the transportation process, so that the well cementation quality is influenced. In addition, some small-sized movable dry mixing devices exist at present, and the phenomenon of uneven mixing caused by unreasonable flow design and single mixing means exists. Therefore, a movable dry mixing pry which is convenient to transport, reasonable in process design and uniform in field mixing is needed to be designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a convenient transportation, flow reasonable in design, on-the-spot mix even portable dry-mixing sled that mixes.
The utility model provides a technical scheme that its technical problem adopted is:
a movable dry mixing pry comprises a pry seat, a metering tank, a primary mixing tank, a batch mixing tank, a dust removal tank and an air compressor; the metering tank, the primary mixing tank, the batch mixing tank and the air compressor are all arranged on the prying seat; the air compressor is positioned at one end part of the upper surface of the prying seat; the upper part of the metering tank is provided with a bag breaking device; the upper parts of the primary mixing tank and the batch mixing tank are respectively provided with a dust removal tank; the primary mixing tank is respectively connected with the metering tank and the batch mixing tank through a material manifold system; one side of the metering tank is provided with an air source distributor a, one side of the primary mixing tank is provided with an air source distributor b, one path of the air source distributor a is connected with the air source distributor b through a control pipeline, the other path of the air source distributor a is communicated with the metering tank to provide compressed air for the metering tank, and the air source distributor b is communicated with the primary mixing tank and the batch mixing tank through an air inlet pipeline.
Further, the material manifold system comprises a feeding manifold and a discharging manifold; the feeding manifold comprises two flow manifolds: one path is a pipe manifold for conveying the medicines from the metering tank to the primary mixing tank, and the other path is a pipe manifold for conveying the cement from a feeding quick joint and a feeding valve of the primary mixing tank to the primary mixing tank; the discharge manifold also comprises two flow manifolds: one path of the raw material enters a manifold of the batch mixing tank through a discharge valve of the primary mixing tank, a discharge four-way joint, a pipeline mixer and a bulk butterfly valve of the batch mixing tank; the other path is a manifold for discharging through two discharging butterfly valves arranged on two sides of the discharging four-way valve. Through the flow design of the discharging cross joint, the structure is simple, the function is strong, and the discharging in two directions can be carried out on the premise of not moving the dry mixing pry; on the other hand, the pipeline mixer is arranged before the materials enter the batch mixing tank, so that the materials and the medicines can be mixed more uniformly.
Furthermore, a control chamber is further installed at the end part of the other end of the upper surface of the prying seat, and the connection mode is preferably welding; be provided with in the control room and have programmable PLC automatic control system, be provided with human-computer interaction interface on the programmable PLC automatic control system for control the utility model discloses an operation realizes human-computer interaction and automatic control. Programmable PLC automatic control system can carry out the programming as required, consequently the utility model discloses no longer describe to this.
Furthermore, all be equipped with operation platform on metering tank, the jar that mixes just and the batch mixing jar.
Furthermore, the bag breaking device and the metering tank, the two dust removing tanks and the primary mixing tank and the batch mixing tank are connected through a manual/pneumatic butterfly valve, and the air compressor generates pressure to control the action of the pneumatic butterfly valve; shaft type lifting lugs are arranged on the periphery of the prying seat, so that the whole prying is convenient to hoist; and weighing devices are arranged at the bottoms of the supporting legs of the measuring tank, the primary mixing tank and the batch mixing tank.
Further, the dust removal tank comprises a tank body a, a dust removal filter bag arranged in the tank body a, and a back-blowing steam drum used for blowing the dust removal filter bag; the back-blowing steam pocket is arranged on the outer wall of the tank body a and is communicated with the inside of the tank body a through a pipeline; a dust blocking umbrella cap is arranged in the tank body a and is positioned above the bottom outlet and below the dust removal filter bag; the top of the dust removal filter bag is connected to the inside of the dust removal tank through a flange, so that the dust removal filter bag can be conveniently replaced; the dust removing tank is provided with a pulse air bag and a pulse electromagnetic valve, and the pulse back flushing treatment is carried out on the dust removing cloth bag.
The technical effects of the utility model:
compared with the prior art, the movable dry mixing pry adopts closed transportation and mixing, the whole mixing process is controlled by a programmable PLC automatic control system, a multi-stage dust removal device is added, and the air discharged by dust operation is ensured to reach the national standard; the operation cycle of receiving, unloading, conveying, mixing and loading is short, the speed is high and the efficiency is high; the movable dry-mixing station adopts a combined disassembly and assembly type, so that the manpower and material resources during maintenance and moving are reduced, and the transportation in remote places such as well sites is facilitated; the utility model is convenient for bulk storage and convenient and fast for breaking the bagged medicine, and avoids dust pollution; the discharge cross has the advantages of simple structure and strong function, can discharge materials in two directions without moving a dry mixing pry, is provided with a pipeline mixer before entering a batch mixing tank, and can enable the materials and the medicines to be mixed more uniformly; the whole structure is reasonable in design and good in application environment.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
fig. 2 is a top view of the present invention in fig. 1;
FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of the structure of the human-computer interaction interface of the present invention;
FIG. 5 is an enlarged view of the dust-removing tank structure of the present invention;
wherein, the air compressor 1, the prying seat 2, the batch mixing tank 3, the pipeline mixer 4, the air source distributor b5, the primary mixing tank 6, the metering tank 7, the control chamber 8, the bag breaking device 9, the dust removing tank 10, the control pipeline 11, the operation platform 12, the weighing device 13, the lifting lug 14, the batch mixing tank pulse air bag 301, the bulk material butterfly valve 302, the morning umbrella cover 401, the tank a402, the back blowing air bag 403, the dust removing filter bag 404, the pulse air bag air inlet valve 501, the air source inlet valve 502, the primary mixing tank side seal air inlet valve 503, the air source distributor pressure transmitter 504, the primary mixing tank bottom seal air inlet valve 505, the discharge scavenging line valve 506, the batch mixing tank side seal air inlet valve 507, the batch mixing tank bottom seal air inlet valve 508, the quick connector 601, the feed valve 602, the check valve 603, the primary mixing tank pulse air bag 604, the primary mixing tank discharge valve 605, the discharge butterfly valve 606, the discharge four-way 607, the air source distributor a701, the metering tank side seal air inlet, An air inlet rubber pipe 704, a one-way valve 705, an air inlet four-way valve 706, a programmable PLC automatic control system 801 and a human-computer interaction interface 802.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Example 1:
as shown in fig. 1 to 4, the movable dry mixing pry of the embodiment includes a pry base 2, a metering tank 7, a primary mixing tank 6, a batch mixing tank 3, a dust removal tank 10, and an air compressor 1; the metering tank 7, the primary mixing tank 6, the batch mixing tank 3 and the air compressor 1 are all arranged on the prying seat 2; the air compressor 1 is positioned at one end part of the upper surface of the prying seat 2; the upper part of the metering tank 7 is provided with a bag breaking device 9; the upper parts of the primary mixing tank 6 and the batch mixing tank 3 are respectively provided with a dust removing tank 10; the primary mixing tank 6 is respectively connected with the metering tank 7 and the batch mixing tank 3 through a material manifold system; an air source distributor a701 is arranged on one side of the metering tank 7, an air source distributor b5 is arranged on one side of the primary mixing tank 6, one path of the air source distributor a701 is connected with an air source distributor b9 through a control pipeline 11, the other path of the air source distributor a701 is communicated with the metering tank 7 to provide compressed air for the metering tank 7, and the air source distributor b5 is communicated with the primary mixing tank 6 and the batch mixing tank 3 through an air inlet pipeline.
As shown in fig. 2, the material manifold system according to the embodiment includes a material inlet manifold and a material outlet manifold; the feeding manifold comprises two flow manifolds: one path is a pipe manifold for conveying the medicines from the metering tank 7 to the primary mixing tank 6, and the other path is a pipe manifold for conveying the cement from a feeding quick joint 601 and a feeding valve 602 of the primary mixing tank 6 to the primary mixing tank 6; the discharge manifold also comprises two flow manifolds: one path enters a manifold of the batch mixing tank 3 through a discharge valve 605 of the primary mixing tank, a discharge four-way valve 607, the pipeline mixer 4 and a bulk butterfly valve 302 of the batch mixing tank 3; the other path is a pipe manifold for discharging through two discharging butterfly valves 606 arranged on two sides of a discharging four-way valve 607. Through the flow design of the discharging four-way connector 607, the structure is simple, the function is strong, and the discharging in two directions can be carried out on the premise of not moving the dry mixing pry; on the other hand, the pipeline mixer 4 is arranged before the materials enter the batch mixing tank 3, so that the materials and the medicines can be mixed more uniformly.
Specifically, the air source distributor a701 of this embodiment is connected to an external air source through an external air source inlet valve 703, and is connected to the metering tank 7 through a metering tank side seal air inlet valve 702, an air inlet rubber hose 704, and an air inlet four-way 706, and a check valve 705 is disposed on the air inlet rubber hose 704.
Specifically, the air source distributor b5 of this embodiment is provided with a pressure transmitter 504 for an air source distributor, and two ends of the pressure transmitter are respectively connected with the air bag 604 for pulse of the primary mixing tank and the air bag 301 for pulse of the batch mixing tank through the pulse air bag air inlet valve 501; the air source distributor b5 is connected with the control pipeline 11 through an air source inlet valve 502, is connected with a side seal air inlet of the primary mixing tank 6 through a primary mixing tank side seal air inlet valve 503, is connected with a bottom seal air inlet of the primary mixing tank 6 through a primary mixing tank bottom seal air inlet valve 505, is respectively connected with discharge manifolds with discharge butterfly valves 606 on two sides of a discharge four-way valve 607 through two discharge scavenging line valves 506, is connected with a side seal air inlet of the batch mixing tank 3 through a batch mixing tank side seal air inlet valve 507, and is connected with a bottom seal air inlet of the batch mixing tank 3 through a batch mixing tank bottom seal air inlet valve 508; a check valve 603 is arranged on a connecting pipeline of the side seal air inlet valve 503 of the primary mixing tank and the side seal air inlet of the primary mixing tank 6.
In the embodiment, the control chamber 8 is further installed at the end part of the other end of the upper surface of the prying seat 2, and the connection mode is preferably welding; be provided with in the control room 8 and have programmable PLC automatic control system 801, be provided with human-computer interaction interface 802 on programmable PLC automatic control system 801 for control the utility model discloses an operation realizes human-computer interaction and automatic control. Programmable PLC automatic control system 801 can carry out the programming as required, consequently the utility model discloses no longer describe to this.
This embodiment all be equipped with operation platform 12 on metering tank 7, the jar 6 and the batch mixing jar 3 of just mixing.
In the embodiment, the bag breaking device 9 and the metering tank 7, the two dust removing tanks 10, the primary mixing tank 6 and the batch mixing tank 3 are connected through a manual/pneumatic butterfly valve, and the air compressor 1 generates pressure to control the action of the pneumatic butterfly valve; 4 shaft type lifting lugs 14 are arranged on the periphery of the prying seat 2, so that the whole prying is convenient to hoist; and weighing devices 13 are arranged at the bottoms of the supporting legs of the metering tank 7, the primary mixing tank 6 and the batch mixing tank 3.
As shown in fig. 5, the dust removing tank 10 includes a tank body a402, a dust removing filter bag 404 disposed inside the tank body a402, and a blowback steam drum 403 for purging the dust removing filter bag 404; the blowback steam pocket 403 is arranged on the outer wall of the tank body a402 and communicated with the interior of the tank body a402 through a pipeline; a dust blocking umbrella cap 401 is arranged in the tank body a402, and the dust blocking umbrella cap 401 is positioned above the bottom outlet and below the dust removal filter bag 404; the top of the dust removal filter bag 404 is connected with the interior of the dust removal tank 10 through a flange, so that the dust removal filter bag 404 can be conveniently replaced; the dust removing tank 10 is provided with a pulse air bag and a pulse electromagnetic valve, and the pulse back flushing treatment is carried out on the dust removing cloth bag.
The working principle is as follows:
the additive enters the metering tank 7 through the bag breaking device 9, the weighing device 13 on the metering tank 7 measures the weight of the metering tank 7, materials such as cement are pumped into the primary mixing tank 6 through the feeding manifold and the feeding hole, and the weighing device 13 on the primary mixing tank 6 measures the weight of the materials in the primary mixing tank 6; the additive is beaten into just mixing tank 6 by the inlet manifold after 7 in the metering tank gasifies through gasification equipment, admit air through just mixing 6 bottom end seal air inlets of jar, open the evacuation mouth of just mixing tank 6, close other valves, mix after the stirring, the material in the jar 6 that just mixes is beaten into batch mixing tank 3 by pipeline mixer 4 on the pipeline through gasification equipment, admit air through batch mixing tank 3 bottom end seal air inlet, open the evacuation mouth of batch mixing tank 3, close other valves, discharge after mixing the stirring with the material in the batch mixing tank 3, the material is mixed several times in just mixing tank 6 and batch mixing tank 3 and is made the additive mix more evenly with materials such as cement. The programmable PLC automatic control system realizes automatic control by controlling the detection of the switch, the weighing device, the pressure sensor and the like of the pneumatic valve. In addition, the exhaust gas in the primary mixing tank 6 and the batch mixing tank 3 enters the dust removal tank 10, and the materials attached to the dust removal filter bag 404 of the dust removal tank 10 are returned to the primary mixing tank 6 and the batch mixing tank 3 through a pulse back-blowing system; the primary mixing tank 6 and the batch mixing tank 3 are both provided with two air inlet pipelines, one is bottom seal air inlet of a ground short section and side seal air inlet around the side face of the cone, so that the mixed materials are more uniform.
The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the forms and styles of the above embodiments, and any suitable changes or modifications made thereto by those skilled in the art according to the claims of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a portable dry-mixing sled which characterized in that: comprises a prying seat, a metering tank, a primary mixing tank, a batch mixing tank, a dust removal tank and an air compressor; the metering tank, the primary mixing tank, the batch mixing tank and the air compressor are all arranged on the prying seat; the air compressor is positioned at one end part of the upper surface of the prying seat; the upper part of the metering tank is provided with a bag breaking device; the upper parts of the primary mixing tank and the batch mixing tank are respectively provided with a dust removal tank; the primary mixing tank is respectively connected with the metering tank and the batch mixing tank through a material manifold system; and an air source distributor a is arranged on one side of the metering tank, an air source distributor b is arranged on one side of the primary mixing tank, one path of the air source distributor a is connected with the air source distributor b through a control pipeline, the other path of the air source distributor a is communicated with the metering tank, and the air source distributor b is communicated with the primary mixing tank and the batch mixing tank through an air inlet pipeline.
2. The mobile dry skid of claim 1, wherein: the material manifold system comprises a feeding manifold and a discharging manifold; the feeding manifold comprises two flow manifolds: one path is a pipe manifold for conveying the medicines from the metering tank to the primary mixing tank, and the other path is a pipe manifold for conveying the cement from a feeding quick joint and a feeding valve of the primary mixing tank to the primary mixing tank; the discharge manifold also comprises two flow manifolds: one path of the raw material enters a manifold of the batch mixing tank through a discharge valve of the primary mixing tank, a discharge four-way joint, a pipeline mixer and a bulk butterfly valve of the batch mixing tank; the other path is a manifold for discharging through two discharging butterfly valves arranged on two sides of the discharging four-way valve.
3. The mobile dry skid of claim 1, wherein: the air source distributor a is connected with an external air source through an external air source inlet valve, and is connected with the metering tank through a side seal air inlet valve of the metering tank, an air inlet rubber pipe and an air inlet four-way valve, and the air inlet rubber pipe is provided with a one-way valve.
4. The mobile dry skid of claim 1, wherein: the gas source distributor b is provided with a pressure transmitter for the gas source distributor, and two ends of the pressure transmitter are respectively connected with a gas bag for pulse of the primary mixing tank and a gas bag for pulse of the batch mixing tank through a pulse gas bag inlet valve; the air source distributor b is connected with a control pipeline through an air source inlet valve, is connected with a side seal air inlet of a primary mixing tank through a primary mixing tank side seal air inlet valve, is connected with a primary mixing tank bottom seal air inlet through a primary mixing tank bottom seal air inlet valve, is respectively connected with discharge manifolds with discharge butterfly valves arranged on two sides of a discharge cross through two discharge scavenging line valves, is connected with a batch mixing tank side seal air inlet through a batch mixing tank side seal air inlet valve, and is connected with a batch mixing tank bottom seal air inlet through a batch mixing tank bottom seal air inlet valve; and a check valve is arranged on a connecting pipeline of the side seal air inlet valve of the primary mixing tank and the side seal air inlet of the primary mixing tank.
5. The mobile dry skid of claim 1, wherein: a control chamber is further mounted at the end part of the other end of the upper surface of the prying seat; the control room is internally provided with a programmable PLC automatic control system which is provided with a human-computer interaction interface.
6. The mobile dry skid of claim 1, wherein: and the metering tank, the primary mixing tank and the batch mixing tank are all provided with an operating platform.
7. The mobile dry skid of claim 1, wherein: the bag breaking device is connected with the metering tank, and the two dust removing tanks are connected with the primary mixing tank and the batch mixing tank through a manual/pneumatic dual-purpose butterfly valve.
8. The mobile dry skid of claim 1, wherein: and shaft type lifting lugs are arranged around the prying seat.
9. The mobile dry skid of claim 1, wherein: the dust removal tank comprises a tank body a, a dust removal filter bag arranged in the tank body a, and a back-blowing steam drum used for blowing the dust removal filter bag; the back-blowing steam pocket is arranged on the outer wall of the tank body a and is communicated with the inside of the tank body a through a pipeline; a dust blocking umbrella cap is arranged in the tank body a and is positioned above the bottom outlet and below the dust removal filter bag; the top of the dust removal filter bag is connected to the inside of the dust removal tank through a flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967145.XU CN212790791U (en) | 2020-06-01 | 2020-06-01 | Movable dry mixing pry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020967145.XU CN212790791U (en) | 2020-06-01 | 2020-06-01 | Movable dry mixing pry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212790791U true CN212790791U (en) | 2021-03-26 |
Family
ID=75093884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020967145.XU Active CN212790791U (en) | 2020-06-01 | 2020-06-01 | Movable dry mixing pry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212790791U (en) |
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2020
- 2020-06-01 CN CN202020967145.XU patent/CN212790791U/en active Active
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Legal Events
| 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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A mobile dry mixing skid Effective date of registration: 20220816 Granted publication date: 20210326 Pledgee: Weihai commercial bank Limited by Share Ltd. Dongying branch Pledgor: Shandong Wanbang Petroleum Technology Co.,Ltd. Registration number: Y2022980012709 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210326 Pledgee: Weihai commercial bank Limited by Share Ltd. Dongying branch Pledgor: Shandong Wanbang Petroleum Technology Co.,Ltd. Registration number: Y2022980012709 |