CN212986777U - Frequency conversion multipurpose medicament filling device - Google Patents
Frequency conversion multipurpose medicament filling device Download PDFInfo
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- CN212986777U CN212986777U CN202021610388.4U CN202021610388U CN212986777U CN 212986777 U CN212986777 U CN 212986777U CN 202021610388 U CN202021610388 U CN 202021610388U CN 212986777 U CN212986777 U CN 212986777U
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Abstract
The utility model relates to a frequency conversion multipurpose medicament filling device, which comprises a medicament filling module, a power transmission module and a control module; the medicament filling module comprises a chemical medicament daily tank, a filter, a plunger pump, an energy storage device, a pressure switch, a flowmeter and pipeline reducing valves; the power transmission module comprises a variable frequency motor, and the control module comprises a variable frequency control cabinet and a central control system; the variable frequency control cabinet comprises an alternating current frequency converter and an indication panel; the central control system is used for monitoring the flow data of the pump outlet in the pump starting process. The utility model discloses an accurate injection system of medicament based on frequency conversion control utilizes the frequency conversion control mode to realize remote control, has changed the mode that conventional medicament pump need carry out the scene and has markd, has solved that the medicament kind is many, the injection volume span is big and artificial operation uncertainty scheduling problem, has realized multiple medicament, concentration span on a large scale and possesses the operation that the one set of new function of remote start-stop, flow real time monitoring is stopped.
Description
Technical Field
The utility model relates to an oil field charge device technical field especially relates to a multi-purpose medicament filling device of frequency conversion.
Background
In recent years, the corrosion of pipelines in subsea pipelines and surface pipelines in offshore fields has been a typical problem in the operation of the offshore oil industry. According to investigation, the pipeline corrosion is mainly bacterial corrosion under scale, and the pipeline corrosion phenomenon is controlled by adopting a mode of injecting a plurality of agents intermittently at multiple concentrations in the oil field. At present, the conventional agent injection in the oil field mainly adopts single-well injection and conventional injection of a submarine pipeline so as to achieve the purpose of controlling slow release, sterilization, scale prevention and other pipeline protection. However, after physical scale removal measures such as subsea pipeline cleaning operation and the like are performed, the treatment work such as pre-filming and scale removal of bacteria under the pipeline is required, and large-discharge impact dosing measures are mostly adopted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a frequency conversion multipurpose medicament filling device for solving the disadvantages of multiple medicament types, large injection amount span, manual operation uncertainty and the like in the flow of a conventional medicament injection system.
The utility model provides a technical scheme that its technical problem adopted is: the utility model relates to a frequency conversion multipurpose medicament filling device, which comprises a medicament filling module, a power transmission module and a control module;
the medicament filling module comprises a chemical medicament daily tank, a filter, a plunger pump, an energy storage device, a pressure switch, a flowmeter and pipeline reducing valves;
the chemical agent daily tank is connected with the plunger pump through a pipeline, and the plunger pump is connected with the pressure switch through a pipeline;
the bottom of the chemical agent daily tank is provided with an agent tank outlet valve, the inlet of the plunger pump is provided with a pump inlet valve, the agent tank outlet valve and the pipeline between the pump inlet valves are provided with the filter, the pump inlet valve and the pipeline between the plunger pumps are provided with a first discharge pipeline, the first discharge pipeline is provided with a first low-point discharge valve, the first discharge pipeline is connected with a floor drain, the outlet of the plunger pump is provided with the energy storage device, the outlet of the plunger pump is provided with a pump outlet valve, the pipeline between the pump outlet valve and the pressure switch is provided with a check valve, the pressure switch and the pipeline reducing are connected through a pipeline, the pressure switch and the pipeline between the pipeline reducing are provided with the flow meter, the inlet pipeline of the pipeline reducing is provided with a second discharge pipeline, and the second discharge pipeline is provided with a second low-point discharge valve, the second discharge pipeline is connected with the floor drain, the pipeline reducing outlet is connected with the on-site discharge tank and the crude oil sea pipe through pipelines, a first flow inlet valve is arranged on the pipeline of the pipeline reducing tank and the on-site discharge tank, and a second flow inlet valve is arranged on the pipeline of the pipeline reducing tank and the crude oil sea pipe;
the pressure switch comprises a high-pressure protection switch and a low-pressure protection switch, a pressure gauge is arranged on the pressure switch, a third low-point discharge valve is arranged at the pressure switch, and the third low-point discharge valve is connected with the floor drain through a pipeline;
a flow sensor is arranged in the flowmeter, the flowmeter is used for transmitting flow data to the central control system, and the flowmeter is connected with an external power supply through a power line;
the power transmission module comprises a variable frequency motor, the variable frequency motor is electrically connected with the plunger pump, and the variable frequency motor is used for driving the plunger pump;
the control module comprises a variable frequency control cabinet and a central control system;
the variable frequency control cabinet comprises an alternating current frequency converter and an indication panel;
the alternating-current frequency converter comprises a control input end and a control output end, the control input end comprises a first terminal, a second terminal and a power supply, the first terminal is used for controlling frequency rising, the second terminal is used for controlling frequency reduction, the power supply is electrically connected with the pressure switch, the power supply is used for supplying power to the control input end, the low-voltage protection switch is connected with a low-voltage bypass switch in parallel, the control output end is connected with the variable-frequency motor through a cable, and the alternating-current frequency converter is electrically connected with the indication panel;
the indicating panel comprises a low-pressure indicating lamp, a high-pressure indicating lamp, a motor overload indicating lamp, an electrical change-over switch, a frequency lifting button and a motor starting switch; the low-pressure indicator lamp is electrically connected with the low-voltage protection switch, the high-pressure indicator lamp is electrically connected with the high-voltage protection switch, the motor overload indicator lamp is connected with the control output end of the alternating-current frequency converter, the electrical change-over switch is used for controlling the low-voltage bypass switch, the frequency lifting button is connected with the first terminal and the second terminal, and the motor starting switch is connected with a power supply of the variable-frequency motor through a cable;
the central control system is used for monitoring the flow data of the pump outlet in the pump starting process.
As a further aspect of the present invention: the energy storage device adopts a leather bag type energy accumulator.
As a further aspect of the present invention: the flowmeter adopts an electromagnetic flowmeter.
As a further aspect of the present invention: an anti-impact seal head is further arranged at an outlet of the pipeline reducing pipe, and the anti-impact seal head is in an arc shape bending towards the outer side of the pipeline.
As a further aspect of the present invention: the floor drain is communicated with the on-site discharge tank.
The utility model has the advantages that: the utility model discloses a frequency conversion control based accurate injection system of medicament has replaced the tradition and has utilized the manual work to carry out the injection system of manual stroke regulation dosage down, has broken the stroke field control's of conventional medicament injection pump barrier, has reduced the operational risk to utilize the frequency conversion control mode to realize remote control, changed the mode that conventional medicament pump need carry out the on-the-spot demarcation, improved the precision and the high efficiency of medicament filling work, solved the medicament kind many, the injection dosage span is big and the man-made operation uncertainty scheduling problem; the flow meter arranged in the flow path is used for monitoring the volume flow of the medicament in the pipeline and transmitting flow data to the central control system, and the injection amount of the medicament is more accurately and conveniently adjusted in time by combining the operation mode of frequency conversion control, so that the function of monitoring the flow in real time is realized.
Drawings
Fig. 1 is a schematic structural view of a frequency-conversion multipurpose medicament filling device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a control module in the frequency conversion multipurpose chemical filling device according to an embodiment of the present invention;
in the figure: 1 chemical agent daily tank, 2 agent tank outlet valves, 3 filters, 4 pump inlet valves, 5 first low-point discharge valves, 6 plunger pumps, 7 variable-frequency motors, 8 variable-frequency control cabinets, 801 alternating-current frequency converters, 8011 first terminal, 8012 second terminal, 8013 power supply, 8014 control output end, 802 indication panel, 8021 pressure low-low indicator light, 8022 pressure high-high indicator light, 8023 motor overload indicator light, 8024 electrical conversion switch, 8025 motor starting switch, 8026 frequency lifting button, 9 floor drain, 10 floor drain on-site discharge tank, 11 crude oil sea pipe, 12 first flow path inlet valve, 13 second flow path inlet valve, 14 pipeline diameter changing, 15 second low-point discharge valve, 16 flowmeter, 17 third low-point discharge valve, 18 pressure switch, 1801 low-pressure protection switch, outlet valve, 1803 low-pressure bypass switch, 19 pressure meter, 20 single-flow valve, 21 pump low-point discharge valve, 22 energy storage device, 23 protecting against impact against the end socket.
Detailed Description
The frequency conversion multipurpose medicament filling device provided by the invention is explained in detail with reference to the accompanying drawings and specific embodiments.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
The specific embodiment is as follows: as shown in fig. 1 and fig. 2, the frequency-conversion multipurpose medicament filling device in the present embodiment includes a medicament filling module, a power transmission module, and a control module.
As shown in fig. 1, the chemical agent filling module comprises a chemical agent daily tank 1, a filter 3, a plunger pump 6, an energy storage device 22, a pressure switch 18, a flow meter 16 and a pipeline reducing pipe 14;
the chemical agent daily tank 1 is connected with the plunger pump 6 through a pipeline, the plunger pump 6 is connected with the pressure switch 18 through a pipeline, the plunger pump 6 in the embodiment adopts a pump body with a Miton Row model number of PTX030CZ055, the plunger pump 6 does not need variable frequency drive of stroke adjustment, and the flow requirement of large displacement can be met;
the bottom of the chemical agent daily tank 1 is provided with an agent tank outlet valve 2, a pump inlet valve 4 is arranged at an inlet of the plunger pump 6, and the filter 3 is arranged at a pipeline between the agent tank outlet valve 2 and the pump inlet valve 4, in the embodiment, the filter 3 is a basket filter, and the filter 3 is positioned in the same layer area of the chemical agent daily tank 1, so that the inspection and the local replacement are convenient, and the quality of agent injection and the reliability of the flow are ensured; a first discharge pipeline is arranged on a pipeline between the pump inlet valve 4 and the plunger pump 6, a first low-point discharge valve 5 is arranged on the first discharge pipeline, the first discharge pipeline 5 is connected with a floor drain 9, and the floor drain 9 is communicated with the on-site discharge tank 10.
The energy storage device 22 is arranged at the outlet of the plunger pump 6, the energy storage device 22 is a leather bag type energy accumulator, and the energy storage device 22 is used for ensuring the stability of the outlet pressure of the plunger pump during operation and reducing the vibration of a pipeline. And a pump outlet valve 4 is arranged at the outlet of the plunger pump 6, and a check valve 20 is arranged on a pipeline between the pump outlet valve 4 and the pressure switch 18.
The pressure switch 18 comprises a low-pressure protection switch 1801 and a high-pressure protection switch 1802, the pressure switch 18 is a device for protecting flow leakage and high-pressure abnormal states, according to the actual working condition of the crude oil sea pipe, the take-off pressure value of the pressure switch 18 is set to be 1000kpa at low pressure and 3500kpa at high pressure in the embodiment, a pressure gauge 19 is arranged on the pressure switch 18, a third low-point discharge valve 17 is arranged at the pressure switch 18, and the third low-point discharge valve 17 is connected with the floor drain 9 through a pipeline.
The pressure switch 18 with pipeline reducing 14 passes through the pipe connection, pressure switch 18 with be equipped with on the pipeline between the pipeline reducing 14 flowmeter 16, flowmeter 16 adopts the electromagnetic flowmeter, flowmeter 16 passes through the power cord and is connected with external power supply, be equipped with flow sensor in the flowmeter 16, electromagnetic flowmeter 16 is arranged in measuring the volume flow in the conducting liquid and the thick liquid in the closed pipe, and will the data that flow sensor surveyed send the center control system with 4 ~ 20mA current signal in, passes through during the pump start-up the center control system carries out real-time supervision to the flow data of pump export, has changed the mode that conventional medicament pump needs carry out the on-the-spot demarcation to combine frequency conversion control's mode of operation, make the injection volume of medicament can more accurate, conveniently in time adjust.
A second discharge pipeline is arranged at an inlet pipeline of the pipeline reducing 14, a second low-point discharge valve 15 is arranged on the second discharge pipeline, the second discharge pipeline is connected with the floor drain 9, an outlet of the pipeline reducing 14 is connected with an on-site discharge tank 10 and a crude oil sea pipe 11 through pipelines, a first process inlet valve 12 is arranged on the pipeline of the pipeline reducing 14 and the on-site discharge tank 10, and a second process inlet valve 13 is arranged on the pipeline of the pipeline reducing 14 and the crude oil sea pipe 11; the outlet of pipeline reducing 14 still is equipped with protecting against shock head 23, protecting against shock head 23's shape is the arc to pipeline outside bending, protecting against shock head 23 is used for ensuring that the pump mouth arrives jar 10 is driven on the spot with crude oil sea pipe 11 avoids the flow to assault and arouse pipeline reliability and descends.
The power transmission module comprises a variable frequency motor 7, the variable frequency motor 7 is electrically connected with the plunger pump 6, and the variable frequency motor 7 is used for driving the plunger pump 6.
The control module comprises a variable frequency control cabinet 8 and the central control system;
as shown in fig. 2, the variable frequency control cabinet 8 is connected to the variable frequency motor 7 through a cable, the variable frequency control cabinet 8 includes an ac frequency converter 801 and an indication panel 802, and the ac frequency converter 801 is used in the variable frequency control cabinet 8 to adjust the operating frequency of the variable frequency motor 7, so that the pump can achieve the function of flow rate adjustment;
in this embodiment, the ac frequency converter 801 adopts a PowerFlex400 ac frequency converter, which includes a control input end and a control output end 8014, where the control input end includes a first terminal 8011, a second terminal 8012 and a power supply 8013, and by controlling internal parameters of the ac frequency converter 801, the ac frequency converter 801 is set to a form in which all start and stop signals are sent from external terminals, so that an operation instruction is controlled by inputting a switching signal from the outside through an external input terminal, and the external switching signal can be operated at a place far from the frequency converter, thereby implementing remote control of the frequency converter; under the condition that the frequency converter is powered off or fails, a starting mode for starting and inputting a rising edge command is set; the stopping function is set to adopt a slope frequency reduction mode, so that the vehicle can be stopped slowly in a frequency reduction mode according to the slope time in the stopping process, and the water hammer benefit is prevented from impacting a manifold; through the function presetting of the alternating current frequency converter 801, the first terminal 8011 is used for controlling frequency increasing, the second terminal 8012 is used for controlling frequency reducing, the power supply 8013 of the control input end is electrically connected with the pressure switch 18, the power supply 8013 is used for supplying power to the control input end, and as the plunger pump 6 is not provided with liquid at the outlet manifold of the pump body when being started for the first time, the inside of the pipeline is in a low-voltage state, the low-voltage protection switch 1801 is connected with the low-voltage bypass switch 1803 in parallel, the low-voltage bypass switch 1803 is used for having a low-voltage bypass starting protection function when starting the pump, the control output end 8014 is connected with the variable frequency motor 7 through a cable, and the alternating current frequency converter 801 is electrically connected with the indication panel 802.
The indication panel 802 is used for remotely controlling the ac frequency converter 801 and monitoring the medicament filling module, and includes a low-pressure indication lamp 8021, a high-pressure indication lamp 8022, a motor overload indication lamp 8023, an electrical transfer switch 8024, a motor start switch 8025, and a frequency lifting button 8026; the low-pressure indicator light 8021 is electrically connected with the low-pressure protection switch 1801, the high-pressure indicator light 8022 is electrically connected with the high-pressure protection switch 1802, the motor overload indicator light 8023 is connected with the control output end 8014 of the alternating current frequency converter 801, the electrical transfer switch 8024 is used for controlling the low-pressure bypass switch 1803, so that the alternating current frequency converter 801 is remotely controlled to be switched between a normal mode and a bypass mode to be started, the frequency lifting button 8026 is connected with the first terminal 8011 and the second terminal 8012 through external wiring, so that a remote frequency adjusting function is realized, and the motor starting switch 8025 is connected with the power supply 8013 of the variable frequency motor through a cable.
The frequency conversion multipurpose medicament filling device provided by the embodiment has the following working principle:
in this embodiment, the frequency conversion multipurpose medicament filling device needs to open the first low-point discharge valve 5 for pump filling and air exhaust before each start, so as to ensure the working reliability of the metering and protection instrument and ensure the accuracy of the medicament injection amount.
After venting, the first low point discharge valve 5 is closed and the drug canister outlet valve 2, pump inlet valve 4, pump outlet valve 21, first flow path inlet valve 12, second flow path inlet valve 13 are opened and the chemical drug canister 1 level and initial readings of the flow meter 16 are recorded.
After all the project inspection and recording are completed, the plunger pump 6 is started by the motor start switch 8025. According to the flow data monitored by the central control system, the working frequency of the variable frequency motor 7 is changed through the frequency lifting button 8026, whether the pump runs stably or not and whether the reading of the pressure gauge 19 is normal or not on site are observed in the period, and the flow of the flowmeter 16 is compared with the flow of the central control system to see whether the injection requirement is met or not. After the adjustment is finished, the running frequency of the motor when each medicament is injected is recorded, and the last data frequency can be directly recovered when the pump is started next time, so that the effect of matching the flow rate with the frequency is achieved.
After the chemical agent is injected into the agent injection module, the whole process is protected and monitored by the low-pressure indicator light 8021, the high-pressure indicator light 8022 and the motor overload indicator light 8023, and before the pump is started, if the low-pressure indicator light 8021 is turned on, the ac frequency converter 801 needs to be converted into a bypass mode by the electric conversion switch 8024 to start the pump.
After normal injection, the inspection is enhanced to see whether the phenomena of leakage, overflow and dripping occur or not, and the liquid level of the daily tank is observed to prevent the liquid level from being pumped out and running to cause the air intake phenomenon of the pump; and if careless leakage occurs, stopping the pump in time, opening the first low-point discharge valve 5, the second low-point discharge valve 15 and the third low-point discharge valve 17, discharging liquid in the pipeline into the floor drain 9, and then performing maintenance, valve replacement and other work.
After two hours of injection, recording the injection amount, manually stopping the pump, and closing the medicament tank outlet valve 2, the pump inlet valve 4, the pump outlet valve 21, the first flow path inlet valve 12 and the second flow path inlet valve 13; on the picking site, the empty daily chemical agent tank 1 is recorded and returned to the pond in time, and the new daily chemical agent tank 1 is put in place in time.
And injecting a corrosion inhibitor into the crude oil sea pipe 11 for pre-filming at the later stage, wherein the corrosion inhibitor is also injected by adopting the plunger pump 6. When the chemical agent and the corrosion inhibitor are injected in sequence, the pipeline is cleaned and replaced after the chemical agent is injected, and then the corrosion inhibitor is injected to prevent floccules generated by reaction after the chemical agent and the corrosion inhibitor are mixed to block the pipeline; or cleaning the pipeline by adopting a ball-through test after the pre-membrane is carried out.
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 may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A frequency conversion multipurpose medicament filling device, which is characterized in that,
the device comprises a medicament filling module, a power transmission module and a control module;
the medicament filling module comprises a chemical medicament daily tank, a filter, a plunger pump, an energy storage device, a pressure switch, a flowmeter and pipeline reducing valves;
the chemical agent daily tank is connected with the plunger pump through a pipeline, and the plunger pump is connected with the pressure switch through a pipeline;
the bottom of the chemical agent daily tank is provided with an agent tank outlet valve, the inlet of the plunger pump is provided with a pump inlet valve, the agent tank outlet valve and the pipeline between the pump inlet valves are provided with the filter, the pump inlet valve and the pipeline between the plunger pumps are provided with a first discharge pipeline, the first discharge pipeline is provided with a first low-point discharge valve, the first discharge pipeline is connected with a floor drain, the outlet of the plunger pump is provided with the energy storage device, the outlet of the plunger pump is provided with a pump outlet valve, the pipeline between the pump outlet valve and the pressure switch is provided with a check valve, the pressure switch and the pipeline reducing are connected through a pipeline, the pressure switch and the pipeline between the pipeline reducing are provided with the flow meter, the inlet pipeline of the pipeline reducing is provided with a second discharge pipeline, and the second discharge pipeline is provided with a second low-point discharge valve, the second discharge pipeline is connected with the floor drain, the pipeline reducing outlet is connected with the on-site discharge tank and the crude oil sea pipe through pipelines, a first flow inlet valve is arranged on the pipeline of the pipeline reducing tank and the on-site discharge tank, and a second flow inlet valve is arranged on the pipeline of the pipeline reducing tank and the crude oil sea pipe;
the pressure switch comprises a high-pressure protection switch and a low-pressure protection switch, a pressure gauge is arranged on the pressure switch, a third low-point discharge valve is arranged at the pressure switch, and the third low-point discharge valve is connected with the floor drain through a pipeline;
a flow sensor is arranged in the flowmeter, the flowmeter is used for transmitting flow data to the central control system, and the flowmeter is connected with an external power supply through a power line;
the power transmission module comprises a variable frequency motor, the variable frequency motor is electrically connected with the plunger pump, and the variable frequency motor is used for driving the plunger pump;
the control module comprises a variable frequency control cabinet and a central control system;
the variable frequency control cabinet comprises an alternating current frequency converter and an indication panel;
the alternating-current frequency converter comprises a control input end and a control output end, the control input end comprises a first terminal, a second terminal and a power supply, the first terminal is used for controlling frequency rising, the second terminal is used for controlling frequency reduction, the power supply is electrically connected with the pressure switch, the power supply is used for supplying power to the control input end, the low-voltage protection switch is connected with a low-voltage bypass switch in parallel, the control output end is connected with the variable-frequency motor through a cable, and the alternating-current frequency converter is electrically connected with the indication panel;
the indicating panel comprises a low-pressure indicating lamp, a high-pressure indicating lamp, a motor overload indicating lamp, an electrical change-over switch, a frequency lifting button and a motor starting switch; the low-pressure indicator lamp is electrically connected with the low-voltage protection switch, the high-pressure indicator lamp is electrically connected with the high-voltage protection switch, the motor overload indicator lamp is connected with the control output end of the alternating-current frequency converter, the electrical change-over switch is used for controlling the low-voltage bypass switch, the frequency lifting button is connected with the first terminal and the second terminal, and the motor starting switch is connected with a power supply of the variable-frequency motor through a cable;
the central control system is used for monitoring the flow data of the pump outlet in the pump starting process.
2. The variable frequency multi-use medicament filling apparatus according to claim 1, wherein: the energy storage device adopts a leather bag type energy accumulator.
3. The variable frequency multi-use medicament filling apparatus according to claim 2, wherein: the flowmeter adopts an electromagnetic flowmeter.
4. The variable frequency multi-use medicament filling apparatus according to claim 3, wherein: an anti-impact seal head is further arranged at an outlet of the pipeline reducing pipe, and the anti-impact seal head is in an arc shape bending towards the outer side of the pipeline.
5. The variable frequency multi-use medicament filling apparatus according to claim 4, wherein: the floor drain is communicated with the on-site discharge tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021610388.4U CN212986777U (en) | 2020-08-05 | 2020-08-05 | Frequency conversion multipurpose medicament filling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021610388.4U CN212986777U (en) | 2020-08-05 | 2020-08-05 | Frequency conversion multipurpose medicament filling device |
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| CN212986777U true CN212986777U (en) | 2021-04-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113220040A (en) * | 2021-05-07 | 2021-08-06 | 中国海洋石油集团有限公司 | Chemical agent injection flow rate adjusting system |
| CN114961675A (en) * | 2022-05-25 | 2022-08-30 | 德州华海石油机械股份有限公司 | Intelligent on-line detection injection equipment |
-
2020
- 2020-08-05 CN CN202021610388.4U patent/CN212986777U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113220040A (en) * | 2021-05-07 | 2021-08-06 | 中国海洋石油集团有限公司 | Chemical agent injection flow rate adjusting system |
| CN114961675A (en) * | 2022-05-25 | 2022-08-30 | 德州华海石油机械股份有限公司 | Intelligent on-line detection injection equipment |
| CN114961675B (en) * | 2022-05-25 | 2023-07-14 | 德州华海石油机械股份有限公司 | Intelligent on-line detection injection equipment |
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