CN210888903U - Intelligent separate injection device with underground double injection channels - Google Patents
Intelligent separate injection device with underground double injection channels Download PDFInfo
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- CN210888903U CN210888903U CN202020917231.XU CN202020917231U CN210888903U CN 210888903 U CN210888903 U CN 210888903U CN 202020917231 U CN202020917231 U CN 202020917231U CN 210888903 U CN210888903 U CN 210888903U
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Abstract
The utility model belongs to the field of layered water injection in oil fields, which solves the technical problem of large difference of injection allocation quantity of each layer, and provides an intelligent separate injection device of underground double injection channels, which comprises an upper central tube and a lower central tube which are connected and the outer part of the joint is sleeved on a body, the upper end of the upper central tube is connected with an upper oil tube joint, the lower end of the lower central tube is connected with a lower oil tube joint, an outer protective tube is sleeved between the upper oil tube joint and the body, a short protective tube is sleeved between the body and the lower oil tube joint, a first short section, a second short section and a double-channel switching short section are all arranged in the annular space outside the upper central tube and the lower central tube, the first short section and the second short section are respectively communicated with the lower central tube and are internally provided with a small flow measuring component and a large flow measuring component, the first short section and the second short section are respectively communicated with the, and a water nozzle adjusting component is arranged in the upper part of the double-channel switching short section.
Description
Technical Field
The utility model belongs to oil field layering water injection field, concretely relates to device is annotated to two injection channel intelligence in pit.
Background
The oil field is mostly of a multi-layer system and a heterogeneous structure, and a water injection development mode is adopted; because the layer systems are multiple, the physical property difference of each stratum is large, the water absorption capacity of each stratum is different, and the layered water injection process of the water injection well plays a remarkable role in solving the problems in the popularization and implementation of the oil field.
The commonly used flow measurement methods in the field of oilfield zonal injection at present mainly comprise electromagnetic flow measurement, vortex street flow measurement, ultrasonic flow measurement and differential pressure flow measurement.
The electromagnetic flow measuring method has the advantage of large range ratio, but is greatly influenced by underground mineralization and has poor pollution resistance; ultrasonic flow measurement has high requirements on well conditions and poor pollution resistance; the vortex street type flow measurement has high requirements on well conditions and liquid flow rate and cannot meet the requirements of long-term underground application, and the differential pressure type flow measurement has no moving part, is slightly influenced by the well conditions and can meet the requirements of long-term underground application, but is influenced by the precision of a pressure sensor and electronic components, so that the flow range is small.
Due to the fact that the physical properties of all layers are different, the water absorption capacity of all layers is different, and the water absorption capacity of a single layer is changed according to formation parameters, the injection allocation capacity of all layers is quite different, and the requirement of one water injection well for different injection allocation capacities cannot be met simultaneously by a single differential pressure type flow measurement method.
SUMMERY OF THE UTILITY MODEL
In view of this, the main objective of the present invention is to provide an intelligent downhole separate injection device with dual injection channels.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides a two injection channel intelligence in pit divides filling device, the device includes upper oil pipe joint, outer pillar, lower oil pipe joint, upper center tube, lower center tube, body, short protective tube, first nipple joint, second nipple joint, binary channels switching nipple joint, upper center tube and lower center tube are connected and the junction outside cover is established at the body, upper oil pipe joint is connected to the upper end of upper center tube, lower oil pipe joint is connected to the lower extreme of lower center tube, the outer pillar is established to the cover between upper oil pipe joint and the body, short protective tube is established to the cover between body and the lower oil pipe joint, first nipple joint, second nipple joint, binary channels switching all set up in the annular space outside upper center tube and lower center tube, first nipple joint and lower center tube intercommunication and interior seal set up the nipple joint measuring component, second and lower center tube intercommunication and interior seal set up the large-flow measuring component, first nipple joint and second nipple joint switch the water inlet intercommunication of nipple joint upper and lower extreme with the binary channels respectively, the binary channels switches the large-traffic injection channel of nipple joint and the delivery port intercommunication of little flow injection channel and body, the upper portion internal seal that the nipple joint was switched to the binary channels sets up water injection well choke adjusting part and is used for switching the large-traffic injection channel of binary channels switching nipple joint and the delivery port intercommunication state of little flow injection channel and body.
In the above scheme, the small flow measurement assembly and the large flow measurement assembly both comprise a flow probe and a flow signal processing circuit, and the flow probe is connected with the flow signal processing circuit.
In the above scheme, water injection well choke adjusting part includes motor, drive assembly, water injection well choke, the output and the drive assembly of motor are connected, the water injection well choke is connected with drive assembly and is used for the upper portion or the lower part that the binary channels switched over the nipple joint and the delivery port intercommunication state of body under motor drive with drive assembly is connected.
In the above scheme, still including setting up the third nipple joint in annular space, third nipple joint internal seal sets up tests a subassembly and is used for monitoring intraductal external pressure.
In the above scheme, the seal checking assembly comprises two pressure sensors and a measuring circuit, wherein one pressure sensor is arranged in a central channel of the upper central pipe or the lower central pipe and used for monitoring the pressure in the pipe, the other pressure sensor is arranged in a pressure taking port of the upper oil pipe joint or the lower oil pipe joint and used for monitoring the pressure outside the pipe, and the two pressure sensors are connected with the measuring circuit.
In the above scheme, the device further comprises a fourth short section in the annular space, and an overpressure current-limiting protection assembly is arranged in the fourth short section in a sealing mode.
In the above scheme, the overvoltage current-limiting protection component includes a first triode Q3, a second triode Q5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R9, a first voltage regulator D3, a second voltage regulator D4, a third voltage regulator D5, a fourth voltage regulator D6, and a MOS transistor Q4, wherein an S-terminal of the MOS transistor Q4 is connected with a cable through the second resistor R2; the second resistor R2 is connected with a first resistor R1 in parallel, the 1 st end of the first triode Q3 is connected with one end of the second resistor R2, the 2 nd end is connected with the G end of the MOS tube Q4, one path of the 3 rd end is connected with the other end of the second resistor R2 through a second voltage regulator tube D4, the other path is connected with the C end of the second triode Q5, the E end of the second triode Q5 is connected between the other end of the second resistor R2 and a cable, the B end is connected with the ground through a fifth resistor R9, a third voltage regulator tube D5 and a fourth voltage regulator tube D6 in sequence, a first voltage regulator tube D3 and a fifth resistor R9 are connected in parallel between the first triode Q3 and the MOS tube Q4 in sequence, and one end of the fifth resistor R9 is connected with the ground through a fourth resistor R4.
In the scheme, connecting cylinders are arranged between the upper oil pipe joint and the outer protecting pipe and between the short protecting pipe and the lower oil pipe joint, a connecting spiral ring is arranged on the connecting cylinder, and the connecting spiral ring fixes the connecting cylinder on the upper oil pipe joint or the lower oil pipe joint through the retaining ring and the semi-ring.
In the above scheme, the hole back pressure sensor is arranged inside the hole back pressure taking hole of the body.
Compared with the prior art, the utility model discloses a flow measurement that wide-range ratio was realized in the switching of injection passage to satisfy the injection allocation measure and regulate demand of different injection allocation volume, can realize the real-time supervision of layering flow, pressure and water injection well choke aperture in the pit.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent downhole double-injection-channel separate injection device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the embodiment of the present invention, illustrating a sheath removal structure of an intelligent downhole double-injection channel separate injection device;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
fig. 4 is a partial cross-sectional view of the dual channels of the downhole dual-injection channel intelligent separate injection device according to the embodiment of the present invention when the dual channels are closed;
fig. 5 is a partial cross-sectional view of an embodiment of the present invention when a small-flow injection channel of an underground dual-injection-channel intelligent separate injection device is opened;
fig. 6 is a partial cross-sectional view of the embodiment of the present invention when a large flow injection channel is opened in an underground dual injection channel intelligent separate injection device;
fig. 7 is a circuit diagram of an overvoltage current-limiting protection component in an intelligent downhole double-injection channel separate injection device according to an embodiment of the present invention.
In the figure, 1-an upper oil pipe joint, 2-an outer protecting pipe, 3-a lower oil pipe joint, 4-an upper central pipe, 5-a lower central pipe, 6-a body, 61-a water outlet, 62-a hole rear pressure tapping hole, 621-a hole rear pressure sensor, 7-a short protecting pipe, 8-a first short section, 9-a second short section, 10-a double-channel switching short section, 101-a motor, 102-a transmission assembly, 103-a water nozzle, 104-a small square quantity water inlet, 105-a large flow water inlet, 106-a position monitoring sensor, 11-a third short section, 12-a fourth short section, 13-a connecting cylinder, 14-a connecting spiral ring, 15-a retaining ring and 16-a semi-ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides a device is annotated to two injection channel intelligence in pit, as shown in figure 1-3, the device includes upper oil pipe joint 1, outer pillar 2, lower oil pipe joint 3, upper center tube 4, lower center tube 5, body 6, short pillar 7, first nipple joint 8, second nipple joint 9, binary channels switch nipple joint 10, upper center tube 4 and lower center tube 5 are connected and the junction overcoat is established at body 6, upper oil pipe joint 1 is connected to the upper end of upper center tube 4, lower oil pipe joint 3 is connected to the lower extreme of lower center tube 5, outer pillar 2 is established to the cover between upper oil pipe joint 1 and the body 6, short pillar joint 7 is established to the cover between body 6 and lower oil pipe joint 3, first nipple joint 8, second nipple joint 9, binary channels switch 10 all set up in the annular space outside upper center tube 4 and lower center tube 5, first nipple joint 8 communicates and the inside seal sets up little flow measurement subassembly with lower center tube 5, second nipple joint 9 communicates and the inside seal sets up large-traffic measurement subassembly with lower center tube 5, first nipple joint 8 and second nipple joint 9 switch nipple joint 10 with the binary channels respectively and go up the water inlet intercommunication of lower extreme, the binary channels switches the large-traffic injection channel of nipple joint 10 and little flow injection channel and the delivery port 61 intercommunication of body 6, the binary channels switches the upper portion internal seal of nipple joint 10 and sets up water injection well choke adjusting part and is used for switching the binary channels and switches the large-traffic injection channel of nipple joint 10 and little flow injection channel and the delivery port 61 intercommunication state of body 6, like this, the utility model discloses a two injection channel designs, enlarges flow measurement scope, and an instrument can satisfy the demand that different injection quantities were measured and allocated.
The double-channel switching nipple 10 is provided with a small-volume water inlet 104 communicated with the first nipple 8 and used for introducing fluid from the first nipple 8, and the lower side of the double-channel switching nipple is further provided with a large-volume water inlet 105 communicated with the second nipple 9 and used for introducing fluid from the second nipple 9.
The lower part of the double-channel switching nipple 10 is provided with a throttling orifice plate 103 on the upper side of the large-flow water inlet 105.
The small-flow measuring assembly and the large-flow measuring assembly respectively comprise a flow probe and a flow signal processing circuit, and the flow probe is connected with the flow signal processing circuit.
Specifically, the flow probe may be a differential pressure type flow probe, or may be an electromagnetic type or other type flow probe, and when water flows through the inside of the small flow measurement assembly or the large flow measurement assembly, the small flow measurement assembly or the large flow measurement assembly may complete volume flow measurement of water.
The water nozzle adjusting assembly comprises a motor 101, a transmission assembly 102 and a water nozzle 103, the output end of the motor 101 is connected with the transmission assembly 102, and the water nozzle 103 is connected with the transmission assembly 102 and used for switching the large-flow injection channel and the small-flow injection channel of the dual-channel switching short section 10 in an up-and-down motion mode under the driving of the motor 101 to be communicated with the water outlet 61 of the body 6.
The water nozzle adjusting assembly further comprises a position monitoring sensor 106, and the position monitoring sensor 106 is used for monitoring the position of the water nozzle 103 so as to determine the currently opened channel according to the position of the water nozzle 103.
As shown in fig. 4, when the motor 101 drives the water nozzle 103 to move to the position of the water outlet 61 of the body 6, the double channels are closed; as shown in fig. 5, when the motor 101 drives the water nozzle 103 to move to the lower side of the water outlet 61 of the body 6, the upper part of the dual-channel switching nipple 10 is communicated with the water outlet 61 of the body 6, and the lower part of the dual-channel switching nipple 10 is sealed by the water nozzle 103, that is, a small-flow injection channel is opened; as shown in fig. 6, when the motor 101 drives the water nozzle 103 to move to the upper side of the water outlet 61 of the body 6, the lower part of the dual-channel switching nipple 10 is communicated with the water outlet 61 of the body 6, and the upper part of the dual-channel switching nipple 10 is sealed by the water nozzle 103, that is, a large-flow injection channel is opened.
Further, the device also comprises a third short section 11 arranged in the annular space, and a seal checking assembly is arranged inside the third short section 11 in a sealing mode and used for monitoring the pressure inside and outside the pipe.
The seal checking assembly comprises two pressure sensors and a measuring circuit, wherein one pressure sensor is arranged in a central channel of an upper central pipe 4 or a lower central pipe 5 and used for monitoring the pressure in the pipe, the other pressure sensor is arranged in a pressure taking port of an upper oil pipe joint 1 or a lower oil pipe joint 3 and used for monitoring the pressure outside the pipe, and the two pressure sensors are connected with the measuring circuit.
Specifically, two pressure sensors are used for measuring the pressure data change in the oil pipe and in the oil sleeve annulus (outside the pipe) respectively, and the action of the water nozzle adjusting component is matched to realize the seal checking function, wherein the pressure is directly measured from the central passage through a pressure measuring port in the oil pipe, and the pressure measuring port outside the pipe is designed on the upper oil pipe joint 1 or the lower oil pipe joint 3.
Further, the device still includes fourth nipple joint 12 in the annular space, fourth nipple joint 12 internal seal sets up the excessive pressure current-limiting protection subassembly, like this, increases the protection of one deck between this layer of instrument and bus, prevents that this layer of instrument from damaging the normal work that influences other layers of instruments.
As shown in fig. 7, the overvoltage current-limiting protection component includes a first triode Q3, a second triode Q5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R9, a first voltage regulator D3, a second voltage regulator D4, a third voltage regulator D5, a fourth voltage regulator D6, and a MOS transistor Q4, wherein an S terminal of the MOS transistor Q4 is connected with a cable through the second resistor R2; the second resistor R2 is connected with a first resistor R1 in parallel, the 1 st end of the first triode Q3 is connected with one end of the second resistor R2, the 2 nd end is connected with the G end of the MOS tube Q4, one path of the 3 rd end is connected with the other end of the second resistor R2 through a second voltage regulator tube D4, the other path is connected with the C end of the second triode Q5, the E end of the second triode Q5 is connected between the other end of the second resistor R2 and a cable, the B end is connected with the ground through a fifth resistor R9, a third voltage regulator tube D5 and a fourth voltage regulator tube D6 in sequence, a first voltage regulator tube D3 and a fifth resistor R9 are connected in parallel between the first triode Q3 and the MOS tube Q4 in sequence, and one end of the fifth resistor R9 is connected with the ground through a fourth resistor R4.
The utility model discloses an overvoltage protection circuit principle who designs is: when the instantaneous voltage is larger than the normal working voltage range, the emitter E and the collector C of the triode Q5 are conducted, the voltage drop is 0.6V, the VSG voltage of the Q4 is 0.6V and is smaller than the opening threshold voltage VGS (th), the SD of the Q4 is cut off, no voltage is output, and the overvoltage protection effect is achieved.
First triode Q3, first resistance R1, second R2 stabilivolt D4 and MOS pipe Q4, third resistance R3, fourth resistance R4 constitute excessive pressure current-limiting protection circuit, work as the utility model discloses a when the electric current surpassed normal operating current, Q4's VSG < VGS (th), Q4's SD ends, and no voltage output plays the current-limiting protection effect.
Between upper oil pipe joint 1 and outer pillar 2 and all set up connecting cylinder 13 between short pillar 7 and the lower oil pipe joint 3, set up on the connecting cylinder 13 and connect spiral ring 14, connect spiral ring 14 and fix connecting cylinder 13 on upper oil pipe joint 1 or lower oil pipe joint 3 through keeping off ring 15, semi-ring 16, owing to be provided with the power supply line on the upper oil pipe joint 1, take place rotatoryly when installing in order to prevent upper oil pipe joint 1 and other parts, damage the power supply line, so will connect spiral ring 14 and fix on upper oil pipe joint 1 through keeping off ring 15, semi-ring 16, through the screw thread on the rotation connection spiral ring 14 for upper oil pipe joint 1 is in the same place with connecting cylinder 13 installation.
A hole back pressure sensor 621 is provided inside the hole back pressure taking hole 62 of the body 6.
The utility model discloses a working process:
the fluid enters the upper central tube 4 and the lower central tube 5, is injected into the small-flow water inlet when being switched to small flow through the water nozzle adjusting assembly, is injected into the large-flow water inlet when being switched to large flow, and finally flows out from the water outlet 61 of the body 6
During the operation, the utility model discloses an oil pipe transport to predetermined injection allocation position (according to the layering quantity confirm the device quantity of dividing of going into down), communication cable follows the oil pipe outer wall and communicates to well head ground monitoring facilities always.
When normal injection allocation is carried out, the large and small flow injection channels are switched according to the injection allocation demand, the adjustment of the injection allocation is realized by adjusting the opening degree of the water nozzle, the fine injection allocation is realized, when the motor 101 drives the water nozzle 103 to move downwards, the small flow injection channel is opened, and water flows from the small flow injection measurement assembly to the small volume water inlet 104 and flows out to the water outlet 61; when the motor 101 drives the water nozzle 103 to move upwards, the large-flow injection channel is opened, and water flows out to the water outlet 61 through the large-flow injection measuring assembly.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (9)
1. An intelligent separate injection device with underground double injection channels is characterized by comprising an upper central tube joint, an outer protective tube, a lower oil tube joint, an upper central tube, a lower central tube, a body, a short protective tube, a first short section, a second short section and a double-channel switching short section, wherein the upper central tube is connected with the lower central tube, the outer part of the joint is sleeved on the body, the upper end of the upper central tube is connected with the upper oil tube joint, the lower end of the lower central tube is connected with the lower oil tube joint, the outer protective tube is sleeved between the upper oil tube joint and the body, the short protective tube is sleeved between the body and the lower oil tube joint, the first short section, the second short section and the double-channel switching short section are all arranged in an annular space outside the upper central tube and the lower central tube, the first short section is communicated with the lower central tube, the inner seal is provided with a small-flow short-section measuring, first nipple joint and second nipple joint switch the water inlet intercommunication of nipple joint upper and lower extreme with the binary channels respectively, the binary channels switches the large-traffic injection channel of nipple joint and the delivery port intercommunication of little flow injection channel and body, the upper portion internal seal that the nipple joint was switched to the binary channels sets up water injection well choke adjusting part and is used for switching the large-traffic injection channel of binary channels switching nipple joint and the delivery port intercommunication state of little flow injection channel and body.
2. The downhole dual-injection-channel intelligent separate injection device according to claim 1, wherein the small flow measurement assembly and the large flow measurement assembly each comprise a flow probe and a flow signal processing circuit, and the flow probe is connected with the flow signal processing circuit.
3. The underground double-injection-channel intelligent separate-injection device as claimed in claim 1 or 2, wherein the water nozzle adjusting assembly comprises a motor, a transmission assembly and a water nozzle, the output end of the motor is connected with the transmission assembly, and the water nozzle is connected with the transmission assembly and used for switching the upper part or the lower part of the double-channel switching short section to be communicated with the water outlet of the body in an up-and-down movement manner under the driving of the motor.
4. The intelligent downhole double-injection-channel separate injection device according to claim 3, further comprising a third short section arranged in the annular space, wherein a seal checking assembly is arranged in the third short section in a sealing manner and used for monitoring the pressure inside and outside the pipe.
5. The downhole dual-injection-channel intelligent separate injection device according to claim 4, wherein the seal checking assembly comprises two pressure sensors and a measuring circuit, one of the pressure sensors is arranged in the central channel of the upper central tube or the lower central tube and is used for monitoring the pressure in the tube, the other pressure sensor is arranged in the pressure taking port of the upper oil tube joint or the lower oil tube joint and is used for monitoring the pressure outside the tube, and both the two pressure sensors are connected with the measuring circuit.
6. The intelligent downhole double-injection-channel dispensing device as claimed in claim 5, further comprising a fourth nipple in the annular space, wherein an overpressure current-limiting protection component is hermetically arranged in the fourth nipple.
7. The underground double-injection-channel intelligent separate injection device as claimed in claim 6, wherein the overvoltage current-limiting protection component comprises a first triode Q3, a second triode Q5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R9, a first voltage regulator tube D3, a second voltage regulator tube D4, a third voltage regulator tube D5, a fourth voltage regulator tube D6 and a MOS tube Q4, wherein the S end of the MOS tube Q4 is connected with a cable through the second resistor R2; the second resistor R2 is connected with a first resistor R1 in parallel, the 1 st end of the first triode Q3 is connected with one end of the second resistor R2, the 2 nd end is connected with the G end of the MOS tube Q4, one path of the 3 rd end is connected with the other end of the second resistor R2 through a second voltage regulator tube D4, the other path is connected with the C end of the second triode Q5, the E end of the second triode Q5 is connected between the other end of the second resistor R2 and a cable, the B end is connected with the ground through a fifth resistor R9, a third voltage regulator tube D5 and a fourth voltage regulator tube D6 in sequence, a first voltage regulator tube D3 and a fifth resistor R9 are connected in parallel between the first triode Q3 and the MOS tube Q4 in sequence, and one end of the fifth resistor R9 is connected with the ground through a fourth resistor R4.
8. The intelligent downhole dual-injection-channel separate injection device according to claim 7, wherein connecting cylinders are respectively arranged between the upper oil pipe joint and the outer protecting pipe and between the short protecting pipe and the lower oil pipe joint, a connecting spiral ring is arranged on each connecting cylinder, and the connecting spiral ring fixes the connecting cylinders on the upper oil pipe joint or the lower oil pipe joint through the retaining rings and the semi-rings.
9. The intelligent downhole dual-injection-channel dispensing device as claimed in claim 8, wherein a back-hole pressure sensor is disposed inside the back-hole pressure tapping hole of the body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020917231.XU CN210888903U (en) | 2020-05-27 | 2020-05-27 | Intelligent separate injection device with underground double injection channels |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020917231.XU CN210888903U (en) | 2020-05-27 | 2020-05-27 | Intelligent separate injection device with underground double injection channels |
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| CN210888903U true CN210888903U (en) | 2020-06-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561302A (en) * | 2020-07-16 | 2020-08-21 | 西安洛科电子科技股份有限公司 | Intelligent water distributor capable of achieving throwing and fishing wave codes communication |
| CN112576228A (en) * | 2020-12-10 | 2021-03-30 | 西安洛科电子科技股份有限公司 | Fully-sealed balance pressure water nozzle |
| CN113155696A (en) * | 2021-03-30 | 2021-07-23 | 中国电建集团西北勘测设计研究院有限公司 | Water seepage amount measuring device and measuring method for large-scale penetration test |
| CN117569781A (en) * | 2024-01-16 | 2024-02-20 | 西安洛科电子科技股份有限公司 | One-sealing double-matching intelligent water injection instrument |
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2020
- 2020-05-27 CN CN202020917231.XU patent/CN210888903U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561302A (en) * | 2020-07-16 | 2020-08-21 | 西安洛科电子科技股份有限公司 | Intelligent water distributor capable of achieving throwing and fishing wave codes communication |
| CN112576228A (en) * | 2020-12-10 | 2021-03-30 | 西安洛科电子科技股份有限公司 | Fully-sealed balance pressure water nozzle |
| CN112576228B (en) * | 2020-12-10 | 2022-09-20 | 西安洛科电子科技股份有限公司 | Fully-sealed balance pressure water nozzle |
| CN113155696A (en) * | 2021-03-30 | 2021-07-23 | 中国电建集团西北勘测设计研究院有限公司 | Water seepage amount measuring device and measuring method for large-scale penetration test |
| CN113155696B (en) * | 2021-03-30 | 2024-05-03 | 中国电建集团西北勘测设计研究院有限公司 | Water seepage measurement device and water seepage measurement method for large-scale seepage test |
| CN117569781A (en) * | 2024-01-16 | 2024-02-20 | 西安洛科电子科技股份有限公司 | One-sealing double-matching intelligent water injection instrument |
| CN117569781B (en) * | 2024-01-16 | 2024-04-12 | 西安洛科电子科技股份有限公司 | One-sealing double-matching intelligent water injection instrument |
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