CN111255408A - Water injection pressure measurement blocking device - Google Patents
Water injection pressure measurement blocking device Download PDFInfo
- Publication number
- CN111255408A CN111255408A CN201811458656.2A CN201811458656A CN111255408A CN 111255408 A CN111255408 A CN 111255408A CN 201811458656 A CN201811458656 A CN 201811458656A CN 111255408 A CN111255408 A CN 111255408A
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- Prior art keywords
- outer sleeve
- pressure
- fishing
- valve body
- water injection
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a water injection pressure measuring and blocking device which comprises a throwing and fishing assembly, a pressure measuring assembly and a quantitative water injection assembly, wherein the throwing and fishing assembly is connected with the pressure measuring assembly; the quantitative water injection assembly comprises a hollow valve body, an upper outer sleeve, a fixed fluid spring, a fixed fluid middle outer sleeve, an upper water nozzle, a ceramic water nozzle and a lower outer sleeve; the pressure measuring assembly comprises a communication module, a pressure gauge outer sleeve, an oil pipe pressure sensor, a sleeve pipe pressure sensor, a pressure transmitting pipe, a processor and a power supply for supplying electric energy.
Description
Technical Field
The invention relates to a plugging device, in particular to a water injection pressure measuring plugging device.
Background
The existing quantitative blanking plug can only realize quantitative water injection and cannot monitor the formation pressure condition in the water injection process; the existing storage type pressure gauge can only monitor the pressure under the condition that the water injection section is closed, and cannot monitor the formation pressure in the water injection process. In order to solve the problem that the formation pressure can be monitored under the condition of normal quantitative water injection, a water injection pressure measurement plugging device is developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a water injection pressure measuring and blocking device which can simultaneously realize quantitative water injection and measurement of the pressure of the bottom layer in the water injection process.
In order to achieve the purpose, the water injection pressure measuring and blocking device comprises a throwing and fishing assembly, a pressure measuring assembly and a quantitative water injection assembly;
the quantitative water injection assembly comprises a hollow valve body, an upper outer sleeve, a fixed fluid spring, a fixed fluid middle outer sleeve, an upper water nozzle, a ceramic water nozzle and a lower outer sleeve, wherein two ends of the fixed fluid middle outer sleeve are sleeved in the lower end of the upper outer sleeve and the upper end of the lower outer sleeve;
the pressure measuring assembly comprises a communication module, a pressure gauge outer sleeve, an oil pipe pressure sensor, a sleeve pipe pressure sensor and a pressure transmitting pipe, the treater, and be used for providing the power of electric energy, the upper end of going up the overcoat cup joints the lower extreme in the pressure gauge overcoat, the upper end of pressure gauge overcoat cup joints in the lower extreme of throwing dragging for the body overcoat in dragging for the assembly, the pressure transmission pipe, sleeve pipe pressure sensor, treater and communication module all are located the pressure gauge overcoat, the lower extreme of pressure transmission pipe and the upper end swing joint of hollow valve body, sleeve pipe pressure sensor is located the upper end of pressure transmission pipe, there is the clearance between the upper end of hollow valve body and the lower extreme of pressure gauge overcoat, the pressure transmission hole has been seted up to the side of pressure gauge overcoat, oil pipe pressure sensor is located and transmits downtheholely, oil pipe pressure sensor all is connected with the input of treater with sleeve pipe pressure sensor, the output of treater is connected with external.
The assembly is dragged for including fishing rod, press the cap, salvage the pole spring, the bolt, it drags for body overcoat to throw, axle and cam, it has seted up two logical grooves to throw the middle part symmetry of dragging for body overcoat, the cam is located between two logical grooves, and be fixed in through the axle and throw and drag for the body overcoat, be equipped with short sharp locking surface and long sharp locking surface that can be at logical inslot internal rotation on the cam, be equipped with the torsional spring between the outside of cam and the inner wall of throwing and dragging for the body overcoat, press the cap to be connected with the upper end of throwing and dragging for the body overcoat, the lower extreme of fishing rod passes and presses the cap to insert in throwing and dragging for the body overcoat, the bolt cup joints on the side of fishing rod lower extreme, the side of fishing rod is connected with between the pressure cap, the both ends of fishing rod spring are connected with pressing the cap and bolt respectively, the lower.
The lower end of the casing of the throwing and fishing body is connected with the upper end of the casing of the pressure gauge through threads;
the lower end of the pressure gauge outer sleeve is connected with the upper end of the upper outer sleeve through threads;
the lower end of the pressure gauge outer sleeve is connected with the upper end of the pressure transmission pipe through threads.
The upper end and the lower end of the outer sleeve in the fixed fluid are connected with the lower end of the upper outer sleeve and the upper end of the lower outer sleeve through threads;
the hollow valve body is clamped with the upper outer sleeve and used for axially limiting the hollow valve body.
The pressing cap is connected with the upper end of the casing of the throwing and fishing body through threads;
the side of the fishing rod is provided with an annular bulge for limiting, and the annular bulge is positioned on the inner side of the pressing cap.
And a sealing rubber ring is arranged between the pressure transmission pipe and the hollow valve body.
A lower O-shaped sealing ring is arranged on the side surface of the lower outer sleeve;
and an upper O-shaped sealing ring is arranged on the side surface of the upper outer sleeve.
And a plurality of water nozzle gaskets are arranged between the ceramic water nozzle and the fixed fluid middle outer sleeve.
The invention has the following beneficial effects:
when the water injection pressure measuring and blocking device is used, the water injection pressure measuring and blocking device is placed in a working barrel, liquid injected into a stratum enters a lower outer sleeve from the bottom end of an eccentric hole of the working barrel through an inlet at the bottom of the lower outer sleeve so as to flow upwards through a ceramic water nozzle, then flows out through an annular gap between the water nozzle and a hollow valve body and a water outlet hole in the upper outer sleeve and then enters the stratum through the eccentric hole of the working barrel, when the pressure of the eccentric hole of the working barrel is fixed, the water injection pressure in the working barrel is increased, the hollow valve body compresses a fixed fluid spring to move up and down, so that the annular gap between the hollow valve body and the upper water nozzle is reduced, and the function of quantitative water injection is realized; simultaneously earth's surface pressure transmits hollow valve body through last overcoat, again through hollow valve body transmit the pressure transmission pipe on, transmit the sleeve pipe pressure sensor through the interior through-hole of pressure transmission pipe at last to measure the pressure information of earth's surface through pressure sensor, and will in pressure information transmits the treater, the treater basis pressure information draws pressure curve, transmits away the pressure curve who draws through communication module, measures oil pipe's pressure through oil pipe pressure sensor simultaneously, and transmits away through communication module, easy operation, convenience, the practicality is extremely strong.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram showing the position relationship between the pressure transmission pipe 15 and the hollow valve body 16 under normal water injection pressure according to the present invention;
FIG. 3 is a diagram showing the positional relationship between the pressure transmission pipe 15 and the hollow valve body 16 after the water injection pressure is increased according to the present invention;
fig. 4 is a schematic structural diagram of the present invention in operation.
Wherein, 1 is fishing rod, 2 is pressing cap, 3 is fishing rod spring 3, 4 is bolt, 5 is casting and fishing body coat, 6 is axle, 7 is torsion spring, 8 is cam, 9 is pressure gauge coat, 10 is battery chamber cover, 11 is communication module, 12 is processor, 13 is oil pipe pressure sensor, 14 is sleeve pipe pressure sensor, 15 is pressure transmitting pipe, 16 is hollow valve body, 17 is upper O-shaped seal ring, 18 is upper coat, 19 is constant fluid spring, 20 is constant fluid middle coat, 21 is upper water nozzle, 22 is ceramic water nozzle, 23 is water nozzle gasket, 24 is lower coat, 25 is lower O-shaped seal ring, 26 is working barrel bias hole, 27 is groove 27 of working barrel bias hole, 28 is water outlet hole of working barrel bias hole.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, 2, 3 and 4, the pressure measuring and blocking device for water injection comprises a fishing assembly, a pressure measuring assembly and a quantitative water injection assembly; the quantitative water injection assembly comprises a hollow valve body 16, an upper outer sleeve 18, a fixed fluid spring 19 and a fixed fluid middle outer sleeve 20, the water tap comprises an upper water tap 21, a ceramic water tap 22 and a lower outer sleeve 24, wherein two ends of an outer sleeve 20 in a fixed fluid are sleeved in the lower end of an upper outer sleeve 18 and the upper end of the lower outer sleeve 24, the upper water tap 21 and the ceramic water tap 22 are sequentially arranged in the outer sleeve 20 in the fixed fluid along the axial direction, a hollow valve body 16 is sleeved in the upper outer sleeve 18, a fixed fluid spring 19 is sleeved on the side surface of the lower end of the hollow valve body 16, the upper end and the lower end of the fixed fluid spring 19 are respectively connected with the side surface of the hollow valve body 16 and the inner wall of the outer sleeve 20 in the fixed fluid, an annular gap is formed between the inner wall of the upper end of the upper water tap 21 and the outer wall of the lower end of the hollow valve body 16, a water outlet is formed in the; the pressure measuring assembly comprises a communication module 11, a pressure meter outer sleeve 9, an oil pipe pressure sensor 13, a sleeve pipe pressure sensor 14, a pressure transmission pipe 15, a processor 12, a battery cavity sleeve 10 and a power supply for supplying electric energy, wherein the power supply is positioned in the battery cavity sleeve 10, the upper end of an upper outer sleeve 18 is sleeved at the lower end of the pressure meter outer sleeve 9, the upper end of the pressure meter outer sleeve 9 is sleeved in the lower end of a casting and fishing body outer sleeve 5 in the casting and fishing assembly, the battery cavity sleeve 10, the pressure transmission pipe 15, the sleeve pipe pressure sensor 14, the processor 12 and the communication module 11 are all positioned in the pressure meter outer sleeve 9, the lower end of the pressure transmission pipe 15 is movably connected with the upper end of a hollow valve body 16, the sleeve pipe pressure sensor 14 is positioned at the upper end of the pressure transmission pipe 15, a gap exists between the upper end of the hollow valve body 16 and the lower end of the pressure meter outer, the oil pipe pressure sensor 13 and the casing pressure sensor 14 are both connected with the input end of the processor 12, and the output end of the processor 12 is connected with external equipment through the communication module 11.
It should be noted that the fishing assembly comprises a fishing rod 1, a pressing cap 2, a fishing rod spring 3, a bolt 4, a fishing body casing 5, a shaft 6 and a cam 8, wherein two through grooves are symmetrically formed in the middle of the fishing body casing 5, the cam 8 is positioned between the two through grooves, and is supported and fixed in the casing 5 of the throwing and dragging body through a shaft 6, a short sharp locking surface and a long sharp locking surface which can rotate in the through groove are arranged on the cam 8, a torsion spring 7 is arranged between the outer side of the cam 8 and the inner wall of the casing 5 of the throwing and dragging body, a pressing cap 2 is connected with the upper end of the casing 5 of the throwing and dragging body, the lower end of the fishing rod 1 passes through the pressing cap 2 and is inserted into the casing 5 of the throwing and dragging body, the bolt 4 is sleeved on the side surface of the lower end of the fishing rod 1, the side surface of the fishing rod 1 is connected with the pressing cap 2, two ends of the fishing rod spring 3 are respectively connected with the pressing cap 2 and the bolt 4, and the lower end of the fishing rod 1 is clamped on the short pointed lock surface of the cam 8; the lower end of the casting and fishing body outer sleeve 5 is connected with the upper end of the pressure gauge outer sleeve 9 through threads; the lower end of the pressure gauge outer sleeve 9 is connected with the upper end of the upper outer sleeve 18 through threads; the lower end of the pressure gauge outer sleeve 9 is connected with the upper end of the pressure transmission pipe 15 through threads; the upper end and the lower end of the fixed fluid middle outer sleeve 20 are connected with the lower end of the upper outer sleeve 18 and the upper end of the lower outer sleeve 24 through threads; the hollow valve body 16 is clamped with the upper outer sleeve 18 and used for axially limiting the hollow valve body 16; the pressing cap 2 is connected with the upper end of the casing 5 of the throwing and fishing body through threads; the side surface of the fishing rod 1 is provided with an annular bulge for limiting, and the annular bulge is positioned on the inner side of the pressing cap 2; a sealing rubber ring is arranged between the pressure transmission pipe 15 and the hollow valve body 16; the side surface of the lower outer sleeve 24 is provided with a lower O-shaped sealing ring 25; the side surface of the upper outer sleeve 18 is provided with an upper O-shaped sealing ring 17; a plurality of tap gaskets 23 are arranged between the ceramic tap 22 and the constant fluid middle outer sleeve 20.
During throwing operation, a throwing and fishing device carried by a steel wire is connected with the pressing cap 2 through a throwing and conveying head, the throwing and conveying head is provided with a fine hole which is aligned with the fine hole on the pressing cap 2, the throwing and fishing device and the pressing cap 2 are connected in a mode of inserting the fine steel wire, the throwing and conveying head is lowered to the lower part of a target working barrel and lifted to the upper part of the working barrel, then the working barrel is lowered, a long sharp locking surface of the cam 8 is locked into a groove 27 of a deviated hole of the working barrel, the throwing and fishing device is lifted again, the steel wire on the corresponding fine hole of the throwing and conveying head and the pressing cap 2 is cut off. When the gas lift valve is salvaged, the fishing rod 1 is fished by a special fishing head connected with the fishing device arm through threads and then lifted, the short tip locking surface of the cam 8 loses the blocking, the cam 8 drives the long tip locking surface and the short tip locking surface to rotate clockwise for a certain angle, so that the water injection pressure measurement blocking device is unlocked in the groove 27 of the eccentric hole of the working barrel, and the water injection pressure measurement blocking device is further lifted out through the fishing device.
The liquid injected into the stratum enters from the bottom end of the eccentric hole 26 of the working barrel through the water inlet at the lower end of the lower outer sleeve 24, flows upwards through the ceramic water nozzle 22, flows out through the annular gap between the lower end of the hollow valve body 16 and the upper water nozzle 21, flows out through the water outlet hole on the side wall of the upper outer sleeve 18, and finally enters the stratum through the water outlet hole 28 of the eccentric hole of the working barrel. Because the water injection speed is related to the front-back pressure difference of the water nozzle and the cut-off piece, when the water outlet pressure of the eccentric hole 26 of the working barrel is fixed, the water injection pressure in the working barrel is increased, the water injection quantity of the injected water from the bottom end of the eccentric hole 26 of the working barrel through the annular gap between the bottom end of the hollow valve body 16 and the upper water nozzle 21 is increased, but the water injection pressure in the working barrel also acts on the upper annular surface of the hollow valve body 16 from the upper part of the eccentric hole 26 of the working barrel through the upper side wall hole of the upper outer sleeve 18 and drives the hollow valve body 16 to compress the fixed fluid spring 19 and then moves downwards, so that the annular gap between the bottom end of the hollow valve body 16 and the upper water nozzle 21 is reduced, the increased water injection quantity is reduced to the original set value.
Meanwhile, the formation pressure is transmitted to a round hole in the side wall of the bottom end of the hollow valve body 16 through a water outlet hole of the upper outer sleeve 18, and then transmitted to the casing pressure sensor 14 through an inner hole of the hollow valve body 16 and an inner through hole of the pressure transmission pipe 15, in addition, the oil pipe pressure is measured by the oil pipe pressure sensor 13 through a side wall pressure transmission hole in the pressure gauge outer sleeve 9, the pressure information collected by the casing pressure sensor 14 is transmitted to the processor 12, the processor 12 draws a pressure curve according to the received pressure information, and the pressure curve is transmitted to an external device through the communication module 11.
The water injection pressure measuring and blocking device is used for water injection and pressure measurement, and the main construction steps are as follows: the separate injection pipe column is put into the well, a setting packer is pressed, and the seal is tested to be qualified; the top end of the water injection pressure measuring blocking device is connected with a throwing head and is arranged on a throwing and fishing device; a throwing and fishing device is adopted to throw the water injection pressure measurement blocking device into a deviated hole of the water distributor, and water injection and pressure measurement are carried out normally; after water is injected for a period of time, fishing out the water injection pressure measuring blocking device by using a throwing and fishing device, and replaying pressure data; and analyzing the formation condition according to the pressure data and guiding water injection development.
Claims (5)
1. A water injection pressure measuring blocking device is characterized by comprising a throwing and fishing assembly, a pressure measuring assembly and a quantitative water injection assembly; the quantitative water injection assembly comprises a hollow valve body (16), an upper outer sleeve (18), a fixed fluid spring (19), a fixed fluid middle outer sleeve (20), an upper water nozzle (21), a ceramic water nozzle (22) and a lower outer sleeve (24), wherein two ends of the fixed fluid middle outer sleeve (20) are sleeved in the lower end of the upper outer sleeve (18) and the upper end of the lower outer sleeve (24), the upper water nozzle (21) and the ceramic water nozzle (22) are sequentially arranged in the fixed fluid middle outer sleeve (20) along the axial direction, the hollow valve body (16) is sleeved in the upper outer sleeve (18), the fixed fluid spring (19) is sleeved on the side surface of the lower end of the hollow valve body (16), the upper end and the lower end of the fixed fluid spring (19) are respectively connected with the side surface of the hollow valve body (16) and the inner wall of the fixed fluid middle outer sleeve (20), an annular gap is formed between the inner wall of the upper water nozzle (21) and the outer wall of the lower end of the hollow valve body (, the water inlet at the lower end of the lower outer sleeve (24) is communicated with the water outlet hole through the ceramic water nozzle (22), the upper water nozzle (21) and the annular gap in sequence.
2. The water injection pressure measuring and plugging device according to claim 1, wherein the pressure measuring assembly comprises a communication module (11), a pressure gauge jacket (9), an oil pipe pressure sensor (13), a sleeve pipe pressure sensor (14), a pressure transmitting pipe (15), a processor (12) and a power supply for supplying electric energy, the upper end of the upper jacket (18) is sleeved at the lower end of the pressure gauge jacket (9), the upper end of the pressure gauge jacket (9) is sleeved in the lower end of a casting and fishing body jacket (5) in the casting and fishing assembly, the pressure transmitting pipe (15), the sleeve pipe pressure sensor (14), the processor (12) and the communication module (11) are all positioned in the pressure gauge jacket (9), the lower end of the pressure transmitting pipe (15) is movably connected with the upper end of the hollow valve body (16), the sleeve pipe pressure sensor (14) is positioned at the upper end of the pressure transmitting pipe (15), and a gap is formed between the upper end of the hollow valve body (16) and the lower end, the pressure transmission hole has been seted up to the side of pressure gauge overcoat (9), and oil pipe pressure sensor (13) are located the pressure transmission hole, and oil pipe pressure sensor (13) and sleeve pipe pressure sensor (14) all are connected with the input of treater (12), and the output of treater (12) is connected with external equipment through communication module (11). The fishing assembly comprises a fishing rod (1), a pressing cap (2), a fishing rod spring (3), a bolt (4), a fishing body casing (5), a shaft (6) and a cam (8), wherein two through grooves are symmetrically formed in the middle of the fishing body casing (5), the cam (8) is positioned between the two through grooves and is supported and fixed in the fishing body casing (5) through the shaft (6), the cam (8) is provided with a short sharp locking surface and a long sharp locking surface which can rotate in the through grooves, a torsion spring (7) is arranged between the outer side of the cam (8) and the inner wall of the fishing body casing (5), the pressing cap (2) is connected with the upper end of the fishing body casing (5), the lower end of the fishing rod (1) penetrates through the pressing cap (2) to be inserted into the fishing body casing (5), the bolt (4) is sleeved on the side surface of the lower end of the fishing rod (1), and the side surface of the fishing rod (1) is connected with the pressing cap (2), two ends of the fishing rod spring (3) are respectively connected with the pressing cap (2) and the bolt (4), and the lower end of the fishing rod (1) is clamped on the short pointed locking surface of the cam (8); the pressing cap (2) is connected with the upper end of the casing (5) of the throwing and fishing body through threads; the side of the fishing rod (1) is provided with an annular bulge for limiting, and the annular bulge is positioned on the inner side of the pressing cap (2).
3. The water injection pressure measuring and blocking device as claimed in claim 2, wherein the lower end of the casing (5) of the throwing and fishing body is connected with the upper end of the pressure gauge casing (9) through threads; the lower end of the pressure gauge outer sleeve (9) is connected with the upper end of the upper outer sleeve (18) through threads; the lower end of the pressure gauge outer sleeve (9) is connected with the upper end of the pressure transmission pipe (15) through threads.
4. The water injection pressure measuring and plugging device according to claim 1, wherein the upper end and the lower end of the constant fluid middle outer sleeve (20) are connected with the lower end of the upper outer sleeve (18) and the upper end of the lower outer sleeve (24) through threads; the hollow valve body (16) is clamped with the upper outer sleeve (18) and used for axially limiting the hollow valve body (16).
5. The water injection pressure measuring and plugging device according to claim 1, wherein a sealing rubber ring is arranged between the pressure transmission pipe (15) and the hollow valve body (16); a lower O-shaped sealing ring (25) is arranged on the side surface of the lower outer sleeve (24); an upper O-shaped sealing ring (17) is arranged on the side surface of the upper outer sleeve (18); a plurality of water nozzle gaskets (23) are arranged between the ceramic water nozzle (22) and the fixed fluid middle outer sleeve (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811458656.2A CN111255408A (en) | 2018-11-30 | 2018-11-30 | Water injection pressure measurement blocking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811458656.2A CN111255408A (en) | 2018-11-30 | 2018-11-30 | Water injection pressure measurement blocking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255408A true CN111255408A (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811458656.2A Pending CN111255408A (en) | 2018-11-30 | 2018-11-30 | Water injection pressure measurement blocking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111255408A (en) |
Cited By (1)
| 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 |
-
2018
- 2018-11-30 CN CN201811458656.2A patent/CN111255408A/en active Pending
Cited By (1)
| 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 |
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Application publication date: 20200609 |