CN113374457B - Intelligent water distributor for separate layer water injection - Google Patents
Intelligent water distributor for separate layer water injection Download PDFInfo
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- CN113374457B CN113374457B CN202110766791.9A CN202110766791A CN113374457B CN 113374457 B CN113374457 B CN 113374457B CN 202110766791 A CN202110766791 A CN 202110766791A CN 113374457 B CN113374457 B CN 113374457B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 238000002347 injection Methods 0.000 title claims abstract description 66
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- 239000010410 layer Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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Abstract
The invention relates to an intelligent water distributor for layered water injection, wherein a cylinder water inlet hole which is radially communicated with a large-aperture section of a cylinder is symmetrically formed on the circumference of the middle section of the cylinder; the lower end female thread of the barrel is rotatably connected with a lower joint, a fixed water nozzle is arranged above an upper port of the lower joint, a fixed overflow groove is arranged on the fixed water nozzle, a rotatable water nozzle is arranged at the upper end of the fixed water nozzle, the rotatable water nozzle is positioned at the large-aperture section of the barrel, the upper end of the rotatable water nozzle is fixedly connected with the bottom of a transmission shaft, the upper end of the transmission shaft is connected with an output shaft of a servo motor through a coupler, and the servo motor is fixed at the upper end of the barrel. Rotatable water injection well choke is cylindric, and the symmetry is equipped with radial inlet opening on its middle section circumference, radial inlet opening with the barrel inlet opening is located same cross section, and the bottom symmetry of rotatable water injection well choke is equipped with two driving disk overflow grooves. The intelligent water distributor for layered water injection receives pressure wave signals, and the servo motor controls the phase of the rotatable water nozzle to realize accurate water injection of the stratum.
Description
Technical Field
The invention relates to a separate-layer water injection well in the field of petroleum and natural gas, in particular to an intelligent water distributor for separate-layer water injection, and belongs to the technical field of separate-layer water injection.
Background
After the oil field is put into development, the oil layer pressure is continuously reduced along with the increase of the exploitation time, so that the yield of the oil well is greatly reduced, even the spraying and the production stop can be realized, at the moment, in order to make up for the underground vacancy caused by the exploitation of the crude oil, the oil layer pressure is maintained and improved, the high and stable yield of the oil field is realized, and the oil layer is injected with water.
The separated layer water injection implements water injection by the packer and the control of a water nozzle, so that the high-medium low-permeability stratum can play a role of water injection, the separated layer water injection is a main effective means for solving the interlayer contradiction, and the separate injection rate of the domestic oil field water injection well reaches more than 80 percent. Because the workload of wired measurement and adjustment is large and hysteresis exists, technicians consider how to implement intelligent dispensing.
The intelligent separate injection technology utilizes wireless communication to master underground separate injection dynamic in real time, timely adjusts the underground separate injection dynamic, avoids ground professional tests, greatly reduces operation workload and cost, and realizes fine water injection. Therefore, the intelligent separate injection technology is a future development trend of the water injection well of the oil field and is an important component for building the digital oil field. Meanwhile, the intelligent separate injection can solve the difficult problems of separate injection testing and adjustment of a large-slope directional well and a horizontal well.
The intelligent separate injection wireless communication adopts sound waves, electromagnetic waves and pressure waves, realizes wireless transmission between the ground controller and the intelligent water distributor by taking water as a medium, and can achieve the purpose of real-time measurement and adjustment. The transmission rate of the former two is high, and the transmission rate is high due to the need of relaying, so that the transmission method is high in power consumption and cannot be used for a water injection well producing for a long time. In the aspect of wireless intelligent transmission in the water injection well underground, mainly still concentrate on in the aspect of pressure wave transmission, pressure wave transmission distance is long, and is with low costs, but pressure wave transmission speed is slow, and research and application are less at home and abroad, and domestic mainly promotes propagation velocity through encoding and decoding technique, does not have according to actual conditions and the scheme that needs carry out system's consideration yet.
The design of the intelligent water distributor is the core of intelligent separate injection wireless communication, when the intelligent water distributor works, the ground controller sends a group of specific pressure codes, and the intelligent water distributor completes the adjustment of the opening degree of the water nozzle after analyzing the pressure codes. The effective pressure pulse coding and decoding is an important link for realizing the cableless two-way communication of ground and underground instructions and data, the conventional pressure pulse coding and decoding is realized based on a standard square wave sequence, the pressure distribution of a shaft of a water injection well is a dynamic process, the standard square wave sequence cannot be formed, and the decoding error rate is higher.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide the intelligent water distributor for the layered water injection, which is characterized in that after receiving a pressure gauge signal, a servo motor accurately controls the opening degree of a water nozzle to realize the accurate water injection of the stratum.
In order to solve the technical problems, the intelligent water distributor for layered water injection comprises a cylinder body, wherein cylinder body water inlet holes which are communicated with a large-aperture section of the cylinder body along the radial direction are symmetrically formed in the circumference of the middle section of the cylinder body; the lower extreme female screw of barrel has connect the lower clutch soon in, the upper end mouth top of lower clutch is equipped with fixed water injection well choke, be equipped with the fixed overflow groove that the axial link up on the fixed water injection well choke, the upper end of fixed water injection well choke is equipped with rotatable water injection well choke, rotatable water injection well choke is located the bottom fixed connection of barrel big aperture section and its upper end and transmission shaft, the upper end of transmission shaft passes through the shaft coupling and links to each other with servo motor's output shaft, servo motor fixes the upper end of barrel.
As an improvement of the invention, fixed water nozzle caulking grooves are symmetrically arranged on the outer circumference of the fixed water nozzle, threaded counter bores are symmetrically arranged on the circumference of the barrel body, water nozzle fixing screws are screwed in the threaded counter bores, the inner ends of the water nozzle fixing screws are embedded in the fixed water nozzle caulking grooves, and the fixed overflow grooves are two fan-shaped overflow grooves which are centrosymmetric; the male thread below of lower clutch upper end is equipped with the sealed annular of lower clutch, inlay in the sealed annular of lower clutch the sealing washer with the inner wall of barrel realizes sealing, the lower port of barrel supports and leans on the middle part circular bead of lower clutch.
As a further improvement of the invention, the rotatable water nozzle is cylindrical, radial water inlet holes are symmetrically arranged on the circumference of the middle section of the rotatable water nozzle, the radial water inlet holes and the water inlet holes of the barrel body are positioned on the same cross section, and two movable disk overflowing grooves are symmetrically arranged at the bottom of the rotatable water nozzle.
As a further improvement of the invention, the upper end of the rotatable water nozzle is provided with a linear caulking groove, and the center of the linear caulking groove is provided with a central positioning counter bore; the lower end of the transmission shaft is provided with a straight-line tenon in T-shaped connection with the transmission shaft, the center of the bottom of the straight-line tenon is provided with a central positioning boss, the straight-line tenon is embedded in the straight-line caulking groove, and the central positioning boss is embedded in the central positioning counter bore.
As a further improvement of the invention, a transmission shaft boss is arranged at the root part of the transmission shaft, the bottom of the transmission shaft boss is connected with the center of the straight tenon, a sealing ring is embedded between the periphery of the transmission shaft boss and the inner wall of the barrel body, an annular embedded groove is arranged on the inner peripheral wall of the sealing ring, and an inner sealing element is embedded in the annular embedded groove to realize sealing with the transmission shaft boss; the periphery wall of sealing ring is equipped with the outer caulking groove of annular, inlay in the outer caulking groove of annular be equipped with the external seal piece realize with the sealed between the barrel inner wall.
As a further improvement of the invention, a bearing seat is arranged on the step of the boss of the transmission shaft, a bearing seat core pipe extending upwards is arranged in the center of the bearing seat, and the bearing seat core pipe is sleeved on the periphery of the transmission shaft; a plane bearing is arranged on the step of the bearing seat, the top of the plane bearing is propped against the lower part of the convex ring in the cylinder body, and a gap is reserved between the top of the plane bearing and the bearing seat core pipe; and a pressure spring is arranged between the bottom of the fixed water nozzle and the upper port of the lower joint.
As a further improvement of the invention, the coupler is positioned above the convex ring in the cylinder body, the bottom of the servo motor is provided with a water distributor control plate, and an output shaft of the servo motor penetrates through the center of the water distributor control plate; the water distributor control board is provided with a signal conditioning circuit, an MCU (microprogrammed control unit) main control chip and a motor control circuit, wherein the signal conditioning circuit comprises an AD7794 chip, and the MCU main control chip is a PIC18F46 chip; the inner pressure sensor for monitoring the pressure in the pipe is provided with signal output ends AIN1+ and AIN1-, and the outer pressure sensor for monitoring the formation pressure is provided with signal output ends AIN2+ and AIN 2-; a signal output end AIN1+ is connected with the 7 th pin of the AD7794 chip, a signal output end AIN 1-is connected with the 8 th pin of the AD7794 chip, a signal output end AIN2+ is connected with the 9 th pin of the AD7794 chip, and a signal output end AIN 2-is connected with the 10 th pin of the AD7794 chip; and a pin 24 of the AD7794 chip is connected with a pin 8 of the MCU main control chip, and a pin 23 of the AD7794 chip is connected with a pin 9 of the MCU main control chip.
As a further improvement of the invention, the signal conditioning circuit further comprises a temperature sensor LM94022 chip, wherein the 1 st pin and the 4 th pin of the LM94022 chip are connected with VCC-ADC, the 5 th pin of the LM94022 chip is grounded, the 2 nd pin of the LM94022 chip is grounded and is connected with the 12 th pin of the AD7794 chip, and the 3 rd pin of the LM94022 chip is connected with the 11 th pin of the AD7794 chip.
As a further improvement of the invention, the 36 th pin of the MCU main control chip is connected with the 3 rd pin of the MCP6542 chip, the 38 th pin of the MCU main control chip is connected with the 5 th pin of the MCP6542 chip, the 1 st pin of the MCP6542 chip is connected with the 19 th pin of the MC33887 chip, and the 7 th pin of the MCP6542 chip is connected with the 3 rd pin of the MC33887 chip; the 21 st pin of the MCU main control chip is connected with the VCC-ADC through a resistor R18 and is connected with the 2 nd pin of the MC33887 chip, the 6 th pin and the 7 th pin of the MCU main control chip are both connected with the forward rotation signal input end of the servo motor, and the 14 th pin and the 15 th pin of the MCU main control chip are both connected with the reverse rotation signal input end of the servo motor; the A phase interface of the servo motor encoder is connected with the VCC-ADC through a resistor R19 and is connected with the 11 th pin of the MCU main control chip; the interface B of the servo motor encoder is grounded through a resistor R20 and is connected with the 23 rd pin of the MCU main control chip; the No. 2 pin of the MC33887 chip is connected with the VCC-ADC through a resistor R18 and is connected with the No. 21 pin of the MCU main control chip.
As a further improvement of the present invention, after receiving the pressure wave signal of the internal pressure sensor, the MCU main control chip removes the fluctuation caused by noise and vibration through filtering, and compares the signal with the floating threshold baseline, where the threshold value above the floating threshold baseline is interpreted as 1 and the threshold value below the floating threshold baseline is interpreted as 0, thereby implementing decoding of the pressure wave.
Compared with the prior art, the invention has the following beneficial effects: after the instruction of ground controller was received to intelligence water injection mandrel, servo motor's output shaft passes through the shaft coupling drive transmission shaft and rotates, and the lower extreme of transmission shaft drives rotatable water injection well choke and rotates, shields or exposes gradually the fixed overflow groove on the fixed water injection well choke, realizes the regulation of water injection volume gradually.
The traditional decoding datum line of pressure waves is changed into a decoding datum line of a floating threshold curve, the floating threshold datum line is a median line between a wave crest and a wave trough, midpoints of pressure abrupt change sections are sequentially connected to form a floating threshold curve, the upper position of the floating threshold curve is the high position, the lower position of the floating threshold curve is the low position, the high position and the low position are more clear, the decoding error rate is reduced, and the communication success rate is improved.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.
FIG. 1 is a front view of the intelligent water distributor for separated layer water injection.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a perspective exploded view of fig. 1.
Fig. 4 is a schematic block diagram of a control system of the present invention.
Fig. 5 is an electrical schematic diagram of a signal conditioning circuit in the control system of the present invention.
FIG. 6 is a circuit diagram of the MCU master control chip in the control system of the present invention.
Fig. 7 is an electrical schematic diagram of the MCU main control chip in the control system of the present invention.
Fig. 8 is a schematic diagram of a motor control circuit in the control system of the present invention.
FIG. 9 is a decoding schematic diagram of the MCU main control chip in the control system of the present invention.
In the figure: 1. a servo motor; 2. a coupling; 3. a drive shaft; 3a, a straight tenon; 3b, positioning a boss at the center; 4. a rotatable water nozzle; 4a, a radial water inlet hole; 4b, a linear caulking groove; 4c, moving plate overflow grooves; 4d, centering the counter bore; 5. fixing the water nozzle; 5a, fixing a flow passing groove; 5b, fixing a water nozzle caulking groove; 6. a pressure spring; 7. a barrel; 7a, a water inlet of the cylinder body; 7b, a convex ring in the cylinder body; 7c, a threaded counter bore; 7d, fixing the threaded hole by the motor; 8. a flat bearing; 9. a bearing seat; 10. a seal ring; 10a, an annular embedded groove; 10b, an annular external caulking groove; 11. a water distributor control panel; 12. a lower joint; 13. and (5) sealing rings.
Detailed Description
As shown in fig. 1 to 3, the intelligent water distributor for stratified water injection of the invention comprises a cylinder body 7, wherein cylinder body water inlet holes 7a which are radially communicated with a large-aperture section of the cylinder body are symmetrically arranged on the circumference of the middle section of the cylinder body 7; the lower end female thread of the barrel 7 is rotatably connected with a lower joint 12, a fixed water nozzle 5 is arranged above the upper port of the lower joint 12, a fixed overflow groove 5a which is axially communicated is arranged on the fixed water nozzle 5, a rotatable water nozzle 4 is arranged at the upper end of the fixed water nozzle 5, the rotatable water nozzle 4 is positioned at the large-aperture section of the barrel, the upper end of the rotatable water nozzle is fixedly connected with the bottom of a transmission shaft 3, the upper end of the transmission shaft 3 is connected with an output shaft of a servo motor 1 through a coupler 2, and the servo motor 1 is fixed at the upper end of the barrel 7.
Water flow enters the inner cavity of the barrel through the water inlet hole 7a of the barrel, downwards enters the fixed overflow groove 5a on the fixed water nozzle 5 through the rotatable water nozzle 4, and then is discharged from the lower connector 12 to enter the stratum. After the instruction of ground controller was received to intelligence water injection mandrel, servo motor 1's output shaft passes through 2 drive transmission shafts 3 rotations of shaft coupling, and the lower extreme of transmission shaft 3 drives rotatable water injection well choke 4 rotations, shields or exposes gradually fixed overflow groove 5a on the fixed water injection well choke 5 gradually, realizes the regulation of water injection volume.
The outer circumference of the fixed water nozzle 5 is symmetrically provided with fixed water nozzle caulking grooves 5b, the circumference of the barrel body 7 is symmetrically provided with threaded counter bores 7c, water nozzle fixing screws are screwed in the threaded counter bores 7c, the inner ends of the water nozzle fixing screws are embedded in the fixed water nozzle caulking grooves 5b, and the fixed overflow grooves 5a are two fan-shaped overflow grooves which are centrosymmetric; the male thread below of the upper end of the lower joint 12 is provided with a lower joint sealing ring groove, a sealing ring 13 is embedded in the lower joint sealing ring groove to realize sealing with the inner wall of the cylinder body 7, and the lower port of the cylinder body 7 abuts against the middle shoulder of the lower joint 12.
The water nozzle fixing screw realizes the radial fixation of the fixed water nozzle 5, and the rotation of the fixed water nozzle 5 is avoided; when the rotatable water nozzle 4 rotates around the axis of the rotatable water nozzle, the flow area of the two fan-shaped flow passing grooves on the fixed water nozzle 5 is gradually increased or reduced, and the water injection amount is adjusted.
Rotatable water injection well choke 4 is cylindric, and the symmetry is equipped with radial inlet opening 4a on its middle section circumference, and radial inlet opening 4a is located same cross section with barrel inlet opening 7a, and rotatable water injection well choke 4's bottom symmetry is equipped with two driving disk overflow grooves 4c. The water flow enters the inner cavity of the rotatable water nozzle 4 through the radial water inlet holes 4a and flows out of the movable disk overflowing groove 4c at the bottom, the movable disk overflowing groove 4c can also be in a fan shape, and when the movable disk overflowing groove and the two fan-shaped overflowing grooves on the fixed water nozzle 5 are completely opposite, the water injection amount reaches the maximum; when the rotatable water nozzle 4 continues to rotate, the superposed area of the movable disc overflowing groove 4c of the rotatable water nozzle 4 and the two fan-shaped overflowing grooves on the fixed water nozzle 5 is gradually reduced, and the water injection amount is reduced along with the superposed area; when the movable disc overflowing groove 4c on the rotatable water nozzle 4 and the two fan-shaped overflowing grooves on the fixed water nozzle 5 are completely staggered, the water injection amount is 0.
For the convenience of linear cutting processing, the movable disc overflowing groove 4c of the rotatable water nozzle 4 can communicate the top surface of the rotatable water nozzle, and the upper space of the rotatable water nozzle 4 is closed, so that the control of water injection quantity cannot be influenced.
The upper end of the rotatable water nozzle 4 is provided with a linear caulking groove 4b, and the center of the linear caulking groove 4b is provided with a central positioning counter bore 4 d; the lower end of the transmission shaft 3 is provided with a straight tenon 3a which is connected with the transmission shaft in a T shape, the center of the bottom of the straight tenon 3a is provided with a central positioning boss 3b, the straight tenon 3a is embedded in the straight caulking groove 4b, and the central positioning boss 3b is embedded in a central positioning counter bore 4d. The fit of the straight tenon 3a and the straight caulking groove 4b realizes the radial positioning of the transmission shaft 3 and the rotatable water nozzle 4, can transmit torque and drives the rotatable water nozzle 4 to rotate; the central positioning boss 3b at the bottom of the straight tenon 3a is matched with the central positioning counter bore 4d of the straight caulking groove 4b, so that the coaxial line of the transmission shaft 3 and the rotatable water nozzle 4 can be ensured.
A transmission shaft boss is arranged at the root part of the transmission shaft 3, the bottom of the transmission shaft boss is connected with the center of the straight tenon 3a, a sealing ring 10 is embedded between the periphery of the transmission shaft boss and the inner wall of the cylinder 7, an annular embedded groove 10a is arranged on the inner peripheral wall of the sealing ring 10, and an inner sealing element is embedded in the annular embedded groove 10a to realize sealing with the transmission shaft boss; the peripheral wall of the sealing ring 10 is provided with an annular external caulking groove 10b, and an external sealing piece is embedded in the annular external caulking groove 10b to realize sealing with the inner wall of the cylinder body 7. The sealing ring 10 can prevent water below the transmission shaft 3 from entering the space of the plane bearing 8, not only can protect the plane bearing 8 from losing oil, but also more importantly can protect the water distributor control plate 11 and the servo motor 1 above from being corroded by water, so that the intelligent water distributor can reliably run for a long time underground.
A bearing seat 9 is arranged on the step of the boss of the transmission shaft, a bearing seat core pipe extending upwards is arranged in the center of the bearing seat 9, and the bearing seat core pipe is sleeved on the periphery of the transmission shaft 3; a flat bearing 8 is arranged on a step of the bearing seat 9, the top of the flat bearing 8 is propped against the lower part of the convex ring 7b in the cylinder body, and a gap is reserved between the flat bearing 8 and the bearing seat core tube; a pressure spring 6 is arranged between the bottom of the fixed water nozzle 5 and the upper port of the lower joint 12. The step of transmission shaft boss provides axial positioning for bearing frame 9, and the bearing frame core pipe provides the location for planar bearing 8's lower part inner edge, and the protruding circle 7b in the barrel provides the top location for planar bearing 8, and the tension and the elasticity of pressure spring 6 make and keep in close contact with between the top surface of fixed water injection well choke 5 and the bottom of rotatable water injection well choke 4, keep suitable tension, and compensate the axial error of rotatable water injection well choke 4 drive section.
A boss at the lower part of the servo motor 1 is pressed on the upper port of the cylinder body 7 to realize axial positioning of the servo motor and the cylinder body, the coupler 2 is positioned above a convex ring 7b in the cylinder body, a water distributor control plate 11 is arranged at the bottom of the servo motor 1, and an output shaft of the servo motor 1 penetrates through the center of the water distributor control plate 11; the servo motor 1 accurately controls the rotation angle of the rotatable water nozzle 4, and the accurate control of the water injection amount is realized.
Motor fixing threaded holes 7d are symmetrically formed in the circumference of the upper portion of the barrel 7, servo motor fixing screws are respectively screwed in the motor fixing threaded holes 7d, and inner end heads of the servo motor fixing screws are fixed on the servo motor 1 to provide radial positioning for the servo motor 1.
As shown in fig. 4, the water distributor control board 11 is powered by a high temperature resistant battery, the water distributor control board 11 is provided with a signal conditioning circuit, an MCU main control chip and a motor control circuit, signals of the pressure sensor and the temperature sensor are conditioned by the signal conditioning circuit and then provided to the MCU main control chip, the MCU main control chip receives a pressure wave signal and then decodes the pressure wave signal, and then sends a control signal to the motor control circuit, and the motor control circuit sends a signal to precisely control the forward rotation or the reverse rotation of the servo motor.
As shown in fig. 5 to 8, the signal conditioning circuit includes an AD7794 chip, and the MCU main control chip is a PIC18F46 chip; the inner pressure sensor for monitoring the pressure in the pipe is provided with signal output ends AIN1+ and AIN1-, and the outer pressure sensor for monitoring the formation pressure is provided with signal output ends AIN2+ and AIN 2-; a signal output end AIN1+ is connected with the 7 th pin of the AD7794 chip, a signal output end AIN 1-is connected with the 8 th pin of the AD7794 chip, a signal output end AIN2+ is connected with the 9 th pin of the AD7794 chip, and a signal output end AIN 2-is connected with the 10 th pin of the AD7794 chip; and a pin 24 of the AD7794 chip is connected with a pin 8 of the MCU main control chip, and a pin 23 of the AD7794 chip is connected with a pin 9 of the MCU main control chip.
The internal pressure sensor is used for monitoring the pressure in the pipe, monitoring pressure waves, waking up an instrument, checking the seal, and the external pressure sensor is used for monitoring the formation pressure; the differential analog signal positive terminal AIN1+ and the differential analog signal negative terminal AIN1 of the internal pressure sensor send pressure signals in the pipe to the 7 th pin and the 8 th pin of the AD7794 chip, the differential analog signal positive terminal AIN2+ and the differential analog signal negative terminal AIN2 of the external pressure sensor send pressure signals of the ground layer to the 9 th pin and the 10 th pin of the AD7794 chip, the AD7794 chip converts the pressure signals into digital signals, and the digital signals are sent to the 9 th pin of the MCU master control chip through the 23 pins of the AD7794 chip; and the 8 th pin of the MCU main control chip sends a control signal to the 24 th pin of the AD7794 chip and selects which path of pressure digital signal to read.
The signal conditioning circuit further comprises a temperature sensor LM94022 chip, a 1 st pin and a 4 th pin of the LM94022 chip are connected with a VCC-ADC, a 5 th pin of the LM94022 chip is grounded, a 2 nd pin of the LM94022 chip is grounded and is connected with a 12 th pin of the AD7794 chip, and a 3 rd pin of the LM94022 chip is connected with an 11 th pin of the AD7794 chip.
The LM94022 chip of the temperature sensor sends a downhole temperature signal to the 11 th pin and the 12 th pin of the AD7794 chip, so that on one hand, the downhole temperature is monitored and prevented from exceeding the tolerant temperature of a downhole instrument, on the other hand, the temperature signal is subjected to temperature compensation, the electric quantity of a high-temperature-resistant battery is corrected, and the temperature is also sent to the 9 th pin of the MCU main control chip through the 23 th pin of the AD7794 chip; and finishing the control signal of the MCU main control chip by a 24-pin of the AD7794 chip, and selecting to read.
The 36 th pin of the MCU master control chip is connected with the 3 rd pin of the MCP6542 chip, the 38 th pin of the MCU master control chip is connected with the 5 th pin of the MCP6542 chip, the 1 st pin of the MCP6542 chip is connected with the 19 th pin of the MC33887 chip, and the 7 th pin of the MCP6542 chip is connected with the 3 rd pin of the MC33887 chip; the 21 st pin of the MCU main control chip is connected with the VCC-ADC through a resistor R18 and is connected with the 2 nd pin of the MC33887 chip, the 6 th pin and the 7 th pin of the MCU main control chip are both connected with the forward rotation signal input end of the servo motor, and the 14 th pin and the 15 th pin of the MCU main control chip are both connected with the reverse rotation signal input end of the servo motor; the A phase interface of the servo motor encoder is connected with the VCC-ADC through a resistor R19 and is connected with the 11 th pin of the MCU main control chip; the interface B of the servo motor encoder is grounded through a resistor R20 and is connected with the 23 rd pin of the MCU main control chip; the No. 2 pin of the MC33887 chip is connected with the VCC-ADC through a resistor R18 and is connected with the No. 21 pin of the MCU main control chip.
The 36 th pin and the 38 th pin of the MCU main control chip send forward and reverse rotation signals of the servo motor to the 3 rd pin and the 5 th pin of the MCP6542 chip, the MCP6542 chip is a microchip double comparator, push-pull output is achieved, current supply capacity can be improved, and heavy direct current loads can be driven. The current amplified positive and negative rotation signals of the servo motor are sent to a pin 3 and a pin 19 of an MC33887 chip;
the MC33887 chip is a monolithic H-bridge power integrated circuit, is used as a servo motor driving chip, has a load current feedback function, is used for closed-loop direct-current servo motor control, can control inductive load, can achieve 5.0A of continuous DC load current, can effectively control peak current between 5.2A and 7.8A, and controls the positive and negative rotation of a servo motor through an OUT1 port and an OUT2 port of the MC33887 chip.
The servo motor encoder adopts a Hall encoder, has AB phase output, can not only measure the speed, but also can distinguish the steering, and feeds back the running state of the servo motor to the MCU main control chip.
The No. 2 pin of the MC33887 chip outputs the fault state of an H bridge for an FS port, is connected with 5.0V through a pull-up resistor R18, and feeds the fault state of the servo motor back to the MCU main control chip.
As shown in fig. 9, after receiving the pressure wave signal of the internal pressure sensor, the MCU master control chip filters the pressure wave signal to remove the fluctuation caused by noise and vibration, and compares the signal with the floating threshold baseline, where the threshold value above the floating threshold baseline is interpreted as 1 and the threshold value below the floating threshold baseline is interpreted as 0, thereby implementing decoding of the pressure wave.
The traditional decoding datum line of pressure waves is changed into a decoding datum line of a floating threshold curve, the floating threshold datum line is a median line between a wave crest and a wave trough, midpoints of pressure abrupt change sections are sequentially connected to form a floating threshold curve, the upper position of the floating threshold curve is the high position, the lower position of the floating threshold curve is the low position, the high position and the low position are more clear, the decoding error rate is reduced, and the communication success rate is improved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention. Technical features of the present invention which are not described may be implemented by or using the prior art, and will not be described herein.
Claims (7)
1. The utility model provides an intelligence water injection mandrel for layering water injection, includes the barrel, its characterized in that: the circumference of the middle section of the cylinder body is symmetrically provided with cylinder body water inlet holes which are radially communicated with the large-aperture section of the cylinder body; a lower joint is screwed in a female thread at the lower end of the barrel, a fixed water nozzle is arranged above an upper port of the lower joint, a fixed overflow groove which is axially communicated is arranged on the fixed water nozzle, a rotatable water nozzle is arranged at the upper end of the fixed water nozzle, the rotatable water nozzle is positioned at a large-aperture section of the barrel, the upper end of the rotatable water nozzle is fixedly connected with the bottom of a transmission shaft, the upper end of the transmission shaft is connected with an output shaft of a servo motor through a coupler, and the servo motor is fixed at the upper end of the barrel;
the rotatable water nozzle is cylindrical, radial water inlet holes are symmetrically formed in the circumference of the middle section of the rotatable water nozzle, the radial water inlet holes and the water inlet holes of the barrel body are located on the same cross section, and two movable disk overflowing grooves are symmetrically formed in the bottom of the rotatable water nozzle;
the upper end of the rotatable water nozzle is provided with a linear caulking groove, and the center of the linear caulking groove is provided with a central positioning counter bore; the lower end of the transmission shaft is provided with a straight-line tenon which is connected with the transmission shaft in a T shape, the center of the bottom of the straight-line tenon is provided with a central positioning boss, the straight-line tenon is embedded in the straight-line embedding groove, and the central positioning boss is embedded in the central positioning counter bore;
the root of the transmission shaft is provided with a transmission shaft boss, the bottom of the transmission shaft boss is connected with the center of the straight tenon, a sealing ring is embedded between the periphery of the transmission shaft boss and the inner wall of the barrel, the inner peripheral wall of the sealing ring is provided with an annular embedded groove, and an inner sealing element is embedded in the annular embedded groove to realize sealing with the transmission shaft boss; the periphery wall of sealing ring is equipped with the outer caulking groove of annular, inlay in the outer caulking groove of annular be equipped with the external seal piece realize with the sealed between the barrel inner wall.
2. The intelligent water distributor for stratified water injection as claimed in claim 1, wherein: the outer circumference of the fixed water nozzle is symmetrically provided with fixed water nozzle caulking grooves, the circumference of the barrel is symmetrically provided with threaded counter bores, water nozzle fixing screws are screwed in the threaded counter bores, the inner ends of the water nozzle fixing screws are embedded in the fixed water nozzle caulking grooves, and the fixed overflow grooves are two fan-shaped overflow grooves which are centrosymmetric; the male thread below of lower clutch upper end is equipped with the sealed annular of lower clutch, inlay in the sealed annular of lower clutch the sealing washer with the inner wall of barrel realizes sealing, the lower port of barrel supports and leans on the middle part circular bead of lower clutch.
3. The intelligent water distributor for stratified water injection as claimed in claim 1, wherein: a bearing seat is mounted on a step of the boss of the transmission shaft, a bearing seat core pipe extending upwards is arranged in the center of the bearing seat, and the bearing seat core pipe is sleeved on the periphery of the transmission shaft; a plane bearing is arranged on the step of the bearing seat, the top of the plane bearing is propped against the lower part of the convex ring in the cylinder body, and a gap is reserved between the top of the plane bearing and the bearing seat core pipe; and a pressure spring is arranged between the bottom of the fixed water nozzle and the upper port of the lower joint.
4. The intelligent water distributor for stratified water injection as claimed in claim 3, wherein: the coupler is positioned above the convex ring in the cylinder body, the bottom of the servo motor is provided with a water distributor control plate, and an output shaft of the servo motor penetrates through the center of the water distributor control plate; the water distributor control board is provided with a signal conditioning circuit, an MCU (microprogrammed control unit) main control chip and a motor control circuit, wherein the signal conditioning circuit comprises an AD7794 chip, and the MCU main control chip is a PIC18F46 chip; the inner pressure sensor for monitoring the pressure in the pipe is provided with signal output ends AIN1+ and AIN1-, and the outer pressure sensor for monitoring the formation pressure is provided with signal output ends AIN2+ and AIN 2-; a signal output end AIN1+ is connected with the 7 th pin of the AD7794 chip, a signal output end AIN 1-is connected with the 8 th pin of the AD7794 chip, a signal output end AIN2+ is connected with the 9 th pin of the AD7794 chip, and a signal output end AIN 2-is connected with the 10 th pin of the AD7794 chip; and a pin 24 of the AD7794 chip is connected with a pin 8 of the MCU main control chip, and a pin 23 of the AD7794 chip is connected with a pin 9 of the MCU main control chip.
5. The intelligent water distributor for stratified water injection as claimed in claim 4, wherein: the signal conditioning circuit further comprises a temperature sensor LM94022 chip, the 1 st pin and the 4 th pin of the LM94022 chip are VCC-ADC, the 5 th pin of the LM94022 chip is grounded, the 2 nd pin of the LM94022 chip is grounded and is connected with the 12 th pin of the AD7794 chip, and the 3 rd pin of the LM94022 chip is connected with the 11 th pin of the AD7794 chip.
6. The intelligent water distributor for stratified water injection as claimed in claim 5, wherein: the 36 th pin of the MCU master control chip is connected with the 3 rd pin of the MCP6542 chip, the 38 th pin of the MCU master control chip is connected with the 5 th pin of the MCP6542 chip, the 1 st pin of the MCP6542 chip is connected with the 19 th pin of the MC33887 chip, and the 7 th pin of the MCP6542 chip is connected with the 3 rd pin of the MC33887 chip; the 21 st pin of the MCU main control chip is connected with the VCC-ADC through a resistor R18 and is connected with the 2 nd pin of the MC33887 chip, the 6 th pin and the 7 th pin of the MCU main control chip are both connected with the forward rotation signal input end of the servo motor, and the 14 th pin and the 15 th pin of the MCU main control chip are both connected with the reverse rotation signal input end of the servo motor; the A phase interface of the servo motor encoder is connected with the VCC-ADC through a resistor R19 and is connected with the 11 th pin of the MCU main control chip; the interface B of the servo motor encoder is grounded through a resistor R20 and is connected with the 23 rd pin of the MCU main control chip; the No. 2 pin of the MC33887 chip is connected with the VCC-ADC through a resistor R18 and is connected with the No. 21 pin of the MCU main control chip.
7. The intelligent water distributor for stratified water injection as claimed in claim 6, wherein: after receiving the pressure wave signal of the internal pressure sensor, the MCU main control chip removes the fluctuation caused by noise and vibration through filtering processing, compares the fluctuation with the floating threshold datum line, reads the threshold value higher than the floating threshold datum line as 1, reads the threshold value lower than the floating threshold datum line as 0, and realizes the decoding of the pressure wave.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936148A (en) * | 2010-08-13 | 2011-01-05 | 西南石油大学 | Adjustable water nozzle for oilfield water injection and water distributor with same |
| CN104047583A (en) * | 2014-07-10 | 2014-09-17 | 中国石油化工股份有限公司 | Underground magnetic control electric water distributor and control method thereof |
| CN104500011A (en) * | 2014-12-30 | 2015-04-08 | 中国石油天然气股份有限公司 | Testing and adjusting pipe column and testing and adjusting method for water distributor of inclined water injection well |
| CN104975832A (en) * | 2015-06-26 | 2015-10-14 | 中国石油天然气股份有限公司 | Bridge type concentric water distributor |
| CN105156093A (en) * | 2015-07-14 | 2015-12-16 | 中国石油天然气股份有限公司 | Bridge type concentric testing, adjusting, testing and sealing integrated testing instrument |
| CN106703767A (en) * | 2017-03-08 | 2017-05-24 | 中国石油天然气股份有限公司 | Water distributor |
| CN107120100A (en) * | 2017-06-28 | 2017-09-01 | 四川省科学城久利电子有限责任公司 | A kind of water filling measurement apparatus using regulation eccentric injection allocation with one heart |
| CN108222876A (en) * | 2017-12-19 | 2018-06-29 | 中国石油天然气集团公司 | A kind of electronic pulling and running tool of bias water nozzle |
| CN109138948A (en) * | 2018-09-21 | 2019-01-04 | 中国石油天然气股份有限公司 | Underground pressure control type intelligent water distributor and using method thereof |
| CN109763798A (en) * | 2019-02-28 | 2019-05-17 | 中国石油天然气股份有限公司 | Underground intelligent water distributor and control method thereof |
| CN110206517A (en) * | 2019-06-26 | 2019-09-06 | 山东大东联石油设备有限公司 | A kind of injection well downhole flow regulator |
-
2021
- 2021-07-07 CN CN202110766791.9A patent/CN113374457B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936148A (en) * | 2010-08-13 | 2011-01-05 | 西南石油大学 | Adjustable water nozzle for oilfield water injection and water distributor with same |
| CN104047583A (en) * | 2014-07-10 | 2014-09-17 | 中国石油化工股份有限公司 | Underground magnetic control electric water distributor and control method thereof |
| CN104500011A (en) * | 2014-12-30 | 2015-04-08 | 中国石油天然气股份有限公司 | Testing and adjusting pipe column and testing and adjusting method for water distributor of inclined water injection well |
| CN104975832A (en) * | 2015-06-26 | 2015-10-14 | 中国石油天然气股份有限公司 | Bridge type concentric water distributor |
| CN105156093A (en) * | 2015-07-14 | 2015-12-16 | 中国石油天然气股份有限公司 | Bridge type concentric testing, adjusting, testing and sealing integrated testing instrument |
| CN106703767A (en) * | 2017-03-08 | 2017-05-24 | 中国石油天然气股份有限公司 | Water distributor |
| CN107120100A (en) * | 2017-06-28 | 2017-09-01 | 四川省科学城久利电子有限责任公司 | A kind of water filling measurement apparatus using regulation eccentric injection allocation with one heart |
| CN108222876A (en) * | 2017-12-19 | 2018-06-29 | 中国石油天然气集团公司 | A kind of electronic pulling and running tool of bias water nozzle |
| CN109138948A (en) * | 2018-09-21 | 2019-01-04 | 中国石油天然气股份有限公司 | Underground pressure control type intelligent water distributor and using method thereof |
| CN109763798A (en) * | 2019-02-28 | 2019-05-17 | 中国石油天然气股份有限公司 | Underground intelligent water distributor and control method thereof |
| CN110206517A (en) * | 2019-06-26 | 2019-09-06 | 山东大东联石油设备有限公司 | A kind of injection well downhole flow regulator |
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