CN108915673B - A kind of downhole pump monitoring device for coal bed gas water pumping gas production - Google Patents
A kind of downhole pump monitoring device for coal bed gas water pumping gas production Download PDFInfo
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- CN108915673B CN108915673B CN201810769701.XA CN201810769701A CN108915673B CN 108915673 B CN108915673 B CN 108915673B CN 201810769701 A CN201810769701 A CN 201810769701A CN 108915673 B CN108915673 B CN 108915673B
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- pipe nipple
- downhole
- monitoring device
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- 239000003245 coal Substances 0.000 title claims abstract description 64
- 238000012806 monitoring device Methods 0.000 title claims abstract description 47
- 238000005086 pumping Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 6
- 210000002445 nipple Anatomy 0.000 claims abstract description 106
- 230000007704 transition Effects 0.000 claims abstract description 52
- 238000012544 monitoring process Methods 0.000 claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 45
- 239000002817 coal dust Substances 0.000 claims abstract description 39
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims description 38
- 238000004891 communication Methods 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 19
- 238000003860 storage Methods 0.000 claims description 18
- 235000020681 well water Nutrition 0.000 claims description 18
- 239000002349 well water Substances 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 16
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 6
- 238000002604 ultrasonography Methods 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 5
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 5
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- 238000001739 density measurement Methods 0.000 claims description 4
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- 230000002452 interceptive effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 15
- 239000007788 liquid Substances 0.000 abstract description 13
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 9
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- 238000003795 desorption Methods 0.000 description 2
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- 238000009792 diffusion process Methods 0.000 description 2
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Classifications
-
- 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
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B47/008—Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions
-
- 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
- E21B47/07—Temperature
-
- 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
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
One kind pumping monitoring device, including downhole pump monitoring device and ground acquisition Transmission system for CBM Drainage hydromining gas downhole；Downhole pump monitoring device includes: to disturb assembly in underground armored cable, cable box cupling, transition pipe nipple, ultrasonic wave coal dust concentration monitor pipe nipple, electric circuit in well pipe nipple, pressure and temp monitoring pipe nipple and pump；Downhole pumps monitoring device and carries fixed valve, is connected to below conventional drainage pump pump barrel box cupling；Ground acquisition Transmission system is with pump monitoring device power supply, electric circuit in well pipe nipple controls pressure and temp monitoring pipe nipple and ultrasonic wave coal dust concentration monitor pipe nipple, temperature, pressure and coal dust impurity concentration variable quantity near monitoring draining Pump Suction Nozzle, dynamic oil level is calculated according to pressure value, treated that signal is transmitted to well site monitoring center for underground main control unit；When coal powder density rises, pump chamber is discharged in disturbance impeller rotation, eddy flow liquid carrying coal dust impurity, realizes active cleaning and downhole parameters on-line monitoring in pump.
Description
Technical field
The invention belongs to on-line monitoring technique fields under CBM Drainage hydromining gas well, and in particular to one kind is used for CBM Drainage
The downhole of hydromining gas pumps monitoring device.Real-time monitoring temperature, pressure, hydrodynamic face and coal dust impurity under CBM Drainage hydromining gas well
The key parameters such as concentration with pump monitoring device.
Background technique
Currently, realizing the automatic of ground parameter substantially for producing well in the complete well construction of China's coal bed gas production of intelligent
Change acquisition, but lacks effective underground key parameter automatic monitoring acquisition means.Especially during coal bed gas water pumping gas production
The parameters such as pressure, temperature, the coal dust impurity content of reservoir surrounding fluid, be consider water pumping gas production difficulty, judge underground failure and
Estimate the key parameter of production potential.The wherein variation of the neighbouring coal dust impurity content of reservoir is that reaction reservoir desorption gap is destroyed
Mining system is rational directly instructs factor for degree and verifying, lacks the direct monitoring means in feasible underground at present, and temperature
Mainly pass through well head monitoring data with pressure and other parameters and calculates or monitor using the method for production logging that disadvantage is the former indirectly
It not can accurately reflect coal bed gas well cylinder bottom actual parameter situation of change, the problem of the latter cannot monitor on-line for a long time, cause is:
1) unreasonable mining system, aggravation reservoir desorption gap are destroyed, and coal dust blocks draining pump after pouring in pit shaft, causes frequently to repair
Well operations, gas well are shut down, and maintenance cost is high；2) later period stabilization, the production of continuous mining are influenced after reservoir destroys, gas production is substantially
Decline, while to the injury unrepairable of coal seam reservoirs.In conclusion reservoir is hurt because caused by lacking underground on-line monitoring
Evil is currently the key factor for restricting China's cbm development and being promoted steadily with production injury.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of for coal bed gas water pumping gas production
Downhole pumps monitoring device, can provide long-term bottom pressure, temperature, coal powder density with the mining operation of draining pump and move
The key parameters such as liquid level on-line monitoring, and pumped simultaneously by underground armored cable Real-time Feedback into ground acquisition Transmission system
It is interior to be equipped with disturbance assembly, coal dust holddown can be prevented according to draining Pump Suction Nozzle coal powder density variation, automatic bug dusting；The dress
The design set be intended to provide reliable downhole parameters monitor, monitor on-line and pump for a long time in actively remove function, alternative production
Well logging provides guidance for the adjusting and optimizing of mining system, and protection reservoir desorbs gap structure, effectively extension pump detection period, reduces
Production cost.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of coal bed gas extraction downhole pump monitoring device, including ground acquisition Transmission system, well mouth sealing device, armouring
Cable, tubing and casing annular space, pump barrel assembly, disturbs assembly in pump and with pump monitoring device at cable box cupling；
It is described with pump monitoring device with after disturbance assembly is connect in pump, be mounted on the pump barrel assembly lower section of draining pump；Institute
With with pumping after monitoring device is connect by cable connector with oil pipe lower going-into-well bottom, armored cable is distributed in for the armored cable one end stated
In tubing and casing annular space, armored cable is fixed by cable box cupling with oil pipe；The signal wire exit well of the armored cable upper end
It is connect after mouth sealing device with ground acquisition Transmission system；
The oil pipe of upward-traveling valves assembly connecting with pumping rod inside the pump barrel assembly, tubing coupling and top connects,
The lower end of pump barrel assembly is connect with pump barrel box cupling；
The upper end of the pump barrel box cupling lower end and extension nipple connects, and the lower end of extension nipple is connect with support tube；Add
Bumper block is equipped in long pipe nipple；Support tube lower end connects transition pipe nipple；Two cable-through hole D of transition pipe nipple upper end are connect by sealing
Head is connect with two cable-through holes on standing valve cover；Fixed valve assembly is installed, fixed valve assembly and transition are short below standing valve cover
The central ports of section are connected, and the upper end of fixed valve assembly is fixed by guide ring；Design has underground brushless direct-current in standing valve cover
Motor, brshless DC motor top connection disturbance impeller, disturbance impeller extend in extension nipple；
The transition pipe nipple outer wall is equipped with cable connection cover board, and cable connection cover board and cable connector are tightly connected,
The armored cable drawn from cable connector is pressed in crossed beam trunking by fixation clamp；It is equipped with side by side below cable connection cover board super
The installation cabin of sonic transducer, the cabin in seal cover board sealing installation cabin；The generation end face of ultrasonic transducer faces reflecting curtain,
Reflecting curtain is fixed at the lateral suction inlet of transition pipe nipple by slot cover board, is formed between ultrasonic transducer and reflecting curtain
Coal powder density monitoring section；Ultrasonic transducer, which is installed, is equipped with high pressure sealing plug, the line and ultrasonic transducer of armored cable in cabin
Line be all connected to high pressure sealing beyond the Great Wall, the line of the high pressure sealing plug other end is connected by cable-through hole A and aviation plug
It connects；
The transition pipe nipple lower end is connect with protection outer cylinder, is equipped with electronic instrument framework and electric circuit in well mould in protection outer cylinder
The end face of block, electronic instrument framework and positioning tube cooperates, and is locked by fixed ring；
The protection outer cylinder lower end and pedestal is tightly connected, and chassis interior is equipped with pressure-temperature sensor, pressure and temp
The probe segment of sensor is connect with pedestal, and pedestal is equipped with the hole being connected to outside, and the temperature and pressure of well water can be by thin
The probe segment that hole is transferred to pressure-temperature sensor is monitored.
After the armored cable is in parallel with oil pipe in tripping in pit shaft, one group of cable box cupling is fixed at interval of two oil pipes,
Cable box cupling is fixed with oil-pipe external wall, and line card slot clasps armored cable；
The armored cable, by cable core lead-in cable connecting cover plate, is set by cable connector on cable connection cover board
There is sealing element；The corresponding cable trough of transition pipe nipple is connected to ultrasonic transducer installation cabin by cable-through hole B；Transition pipe nipple is corresponding
Cable trough is along the circumferential direction set there are two cable-through hole C, and cable-through hole C is connected to two cable-through hole D being axially arranged.
The ultrasonic transducer is cylinder bearing structure, and ultrasonic transducer is matched with the mounting hole sealing on transition pipe nipple
It closes, and is fixed by positioning seat；Seal cover board connect that ultrasonic transducer can be formed with transition pipe nipple end face seal and protects；Ultrasound
The energy converter surface of emission is contacted with well water, the reflecting curtain at the lateral suction inlet of face, and the surface of emission of ultrasonic transducer and reflection are kept off
Distance between plate is no more than 30mm, forms coal powder density monitoring section between the two.
The guide ring is threadedly coupled with support tube top.
The lead of the cable connector is entered the installation cabin of ultrasonic transducer, all leads and high densification by cable-through hole B
Blocking connection, into electric circuit in well pipe nipple.
The tail portion of the ultrasonic transducer is connect with positioning seat, and positioning seat is threadedly coupled with transition pipe nipple, passes through screw thread
Connect the surface of emission of adjustable ultrasonic transducer between reflecting curtain at a distance from.
Slot hole is equipped on the reflecting curtain and slot cover board.
The electric circuit in well module includes: power module two, communication unit, main control unit two, storage unit two, temperature
Measuring unit, pressure measurement cell, concentration measuring unit, drive control unit and direct current generator；Electricity in electric circuit in well module
Source module two is each circuit unit power supply in underground；It is realized by temperature measurement unit, pressure measurement cell and concentration measuring unit
Downhole temperature, pressure and coal powder density measurement；Main control unit two is stored after encoding measurement data by storage unit two,
And measurement data and instrument state are uploaded to by ground acquisition Transmission system by communication unit；When coal powder density reaches setting value
Afterwards, main control unit two-way overdrive control unit control direct current generator work.
Disturbance assembly is located above standing valve cover in the pump, connects disturbance by the extension rod of underground brshless DC motor
Impeller, and locked by fixture nut.
The underground brshless DC motor and standing valve cover sealing cooperate, and underground brshless DC motor is solid by positioning ring
It is scheduled in standing valve cover, is realized and sealed by rotating seal between extension rod and body；It disturbs impeller and uses the non-gold of PEEK
Belong to material；The lead of brshless DC motor is from the cable-through hole B that cable-through hole D enters transition pipe nipple, then accesses high pressure sealing and fill in
Enter in electric circuit in well module.
The ground acquisition Transmission system specifically includes that power module one, downhole communication unit, main control unit one, deposits
Storage unit one, control panel, display interface, data transmission unit and ground communications unit；
Downhole communication unit, main control unit one and ground communications unit are sent to downhole instrument by downhole communication unit and are controlled
System instruction or change instrument parameter；
Main control unit one is stored for downhole instrument measurement data acquisition, realizes downhole instrument control；
Storage unit one, for apparatus measures data under storage well and terrestrial operation record；
Control panel is used for man-machine interactive platform, realizes that people controls the operation of instrument；
Display interface is shown for measurement data and instrument state；
Data transmission unit is used for measurement data remote transmission, can access remote monitoring system or mobile terminal；
Ground communications unit controls downhole instrument or change instrument ginseng by ground communications unit for terrestrial mobile terminal
Number communication interface.
The beneficial effects of the present invention are:
Compared with prior art, downhole of the invention pump monitoring device is mounted below conventional drainage pump pump barrel box cupling,
Original fixed valve assembly is substituted, ground acquisition Transmission system is that system power supply is monitored with pump by underground armored cable, underground electricity
Short out section controls ultrasonic transducer and emits ultrasonic wave to fixed baffle, and temperature and pressure under production wells in real time, utilizes not equality of temperature
Under degree, pressure environment, the relationship of well water concentration and the decaying of sound width is conversed when draining Pump Suction Nozzle coal dust impurity concentration variation
Amount rises situation according to current coal powder density, and the automatic disturbance impeller started above standing valve cover pumps inward turning flowing liquid with row
The swabbing operation of water pump will pump interior coal dust impurity and take draining pump out of, realize actively clean effect in pump；Underground monitoring data are logical
It crosses armored cable to be transmitted back in ground acquisition Transmission system, and is monitored real-time Data Transmission to well site by data transmission unit
The problem of coal bed gas well bottom is likely to occur early is predicted at center, and the adjusting and optimizing for mining system provides guidance.
The downhole pump monitoring device overall structure and docked mode meet condition of contact in coal bed gas pit shaft, can
Fixed valve portion is pumped with conventional drainage well to be exchanged, and does not influence the normal work of draining pump；Special is from top to bottom, to divide
She Ji there are not disturbance assembly in pump, transition pipe nipple, ultrasonic wave coal dust concentration monitor pipe nipple, electric circuit in well pipe nipple, pressure and temp prison
Pipe nipple is surveyed, downhole pumps monitoring device and is connected to below conventional drainage pump pump barrel box cupling by extension nipple, substitutes original fixation
The wire-wrapped screen structure of valve assembly and lower section realizes the double effects that permanent underground on-line monitoring and active are removed.
In the pump disturbance assembly by disturbance impeller assembly, underground brshless DC motor, rotating seal, guide ring,
Standing valve cover, seal nipple and fixed valve assembly composition.Design has cable-through hole in standing valve cover side wall, passes through seal nipple and mistake
Pipe nipple connection is crossed, can be powered for brshless DC motor, control disturbance impeller rotation, wherein disturbance impeller is nonmetallic using PEEK
Material, the absorption of underground electrification pulverized coal particle when effectively preventing not turning, when underground, main control unit monitors that coal powder density rises
When a certain amount of, disturbance impeller rotation is automatically controlled, eddy flow liquid carries coal dust and enters oil pipe, prevents coal dust deposition in pump.
The transition pipe nipple constitute downhole pump monitoring device main body, outside connect with pump barrel box cupling, inside and
Disturbance assembly end face connection in pump.Transition pipe nipple upper design has cable connection cover board for fixing underground armored cable connector,
And realize the transition seal between cable core and instrument cabin；Design has ultrasonic wave coal dust concentration monitor pipe nipple and side in the middle part of transition pipe nipple
To suction inlet, suction inlet design has reflecting curtain and slot cover board, and reflecting curtain is mainly used for having ultrasonic transducer transmitted wave
Reflection, slot cover board can be filtered the impurity of Pump Suction Nozzle, and function is equal to wire-wrapped screen, and down-hole liquid is by cutting
It stitches cover board and central ports is entered by lateral suction inlet, enter in pump finally by fixed valve assembly；The design of transition pipe nipple lower part has
Line interface and sealing structure are crossed, between protection is sealed upper and lower cabin, circuit damage caused by preventing top seal from failing.
The coal powder density monitoring pipe nipple is parallel with lateral suction inlet, and 1 high frequency ultrasound transducing is equipped in cover board cabin
Device has certain distance with reflecting curtain, carries the well water of coal dust by entering monitoring section domain after lateral suction inlet, due to fluid
With certain flow velocity, the basic guarantee uniformity of solid phase particles distributions.Concentration measuring unit excitation in circuit module is super
Sonic transducer emits ultrasonic wave to reflecting curtain, and behind monitoring region, acoustic beam and the well water for carrying coal dust occur diffusion, dissipate
It penetrates, after viscous absorption, reflected sound width is decayed, and monitoring echo-signal decaying judgement draining Pump Suction Nozzle coal dust is passed through
Concentration variation.Under different temperatures, pressure condition, the relationship of coal powder density and echo sound width attenuation coefficient, mainly passes through in well water
A large amount of laboratory test obtains, and corresponding relationship and correction factor have been written into underground primary control program, ensure that the reliable of monitoring
Property.
The present invention is a kind of coal bed gas extraction downhole pump monitoring device, has been put forward for the first time permanent the monitoring with pump in underground and has set
Thinking is counted, is installed below conventional drainage pump pump barrel, carries out draining pump ambient pressure, temperature, gas-liquid when coal powder density and grain
The on-line monitoring of the key parameters such as diameter, technical limitation that the well head which effectively solves measures indirectly and production logging,
A reliable approach is provided for coal seam gas production well underground key parameter on-line monitoring, by special to Production development under coal bed gas well
Property real-time monitoring and pump in automated cleaning, provide reliable underground technical support for coal bed gas well site intelligent construction, effectively
Extend pump detection period, is of great significance to coal bed gas well science mining and production steady in a long-term.
Detailed description of the invention
Fig. 1 is the schematic diagram that coal bed gas extraction downhole of the invention pumps monitoring system.
Fig. 2 is the structural schematic diagram that downhole of the invention pumps monitoring device；Wherein Fig. 2 (a) is downhole pump monitoring dress
Set positive schematic cross-sectional view；Fig. 2 (b) is that downhole pumps the lateral partial schematic sectional view of monitoring device；Fig. 2 (c) be C-C to put
Big schematic diagram.
Fig. 3 is the partial schematic diagram of ultrasonic wave coal dust concentration monitor pipe nipple of the invention；Wherein Fig. 3 (a) is ultrasonic coal
The partial sectional view of powder concentration monitor pipe nipple；Fig. 3 (b) is the A of Fig. 3 (a) to schematic diagram.
Fig. 4 is the schematic diagram of disturbance assembly in pump of the invention.
Fig. 5 is the schematic diagram that coal bed gas extraction downhole of the invention pumps monitoring system functional.
In figure, 1- sucker rod；2- upward-traveling valves assembly；3- tubing coupling；4- pump barrel assembly；5- lower travelling valve assembly；6-
Pump barrel box cupling；7- bumper block；8- extension nipple；9- disturbs impeller；10- guide ring；11- support tube；12- fixation assembly；13- mistake
Cross pipe nipple；The side 14- is to suction inlet；15- aviation plug；16- fixed ring；17- positioning tube；18- protects outer cylinder；19- electronics bone
Frame；20- electric circuit in well module；21- pedestal；22- pressure-temperature sensor；23- cable-through hole A；24- cable connection cover board；In 25-
Edema with the heart involved eye；26- armored cable；27- cable box cupling；28- seal nipple；29- fixation clamp；30- cable connector；31- overcurrent ring
It is empty；32- cable-through hole B；33- seal cover board；34- positioning seat；35- ultrasonic transducer；36- high pressure sealing plug；37- reflecting curtain；
38- coal powder density monitoring section；39- slot cover board；40- slot hole；41- cable-through hole C；42- fixture nut；43- rotating seal；
44- positioning ring；The underground 45- brshless DC motor；46- standing valve cover；47- cable-through hole D；48- ground acquisition Transmission system；49-
Well mouth sealing device；50- tubing and casing annular space；Assembly is disturbed in 51- pump；52- is with pump monitoring device；53- pumping unit；54- casing；
55- oil pipe.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
Referring to Fig. 1, a kind of coal bed gas extraction downhole pump monitoring device, overall system is mainly by ground acquisition Transmission system
48, well mouth sealing device 49, armored cable 26, cable box cupling 27, tubing and casing annular space 50, pump barrel assembly 4, pump are interior disturbs assembly
51, it is formed with pump monitoring device 52.It is described with being disturbed in pump monitoring device 52 and pump after assembly 51 connect as shown in Fig. 1,
It is installed on 4 lower section of pump barrel assembly of conventional drainage pump, instead of original fixed valve assembly；Described 26 one end of armored cable with pump
Monitoring device 52 passes through after cable connector 30 connects with oil pipe lower going-into-well bottom, and armored cable 26 is distributed in tubing and casing annular space 50,
It is fixed by cable box cupling 27 and oil pipe 55, it can prevent cable play from causing to wear；The effect of the well mouth sealing device 49
Be to draw the signal wire of 26 upper end of armored cable, be connected to ground acquisition Transmission system 48, can not only waterproof, and to set
Pipe gas, which is sealed, to be prevented from leaking；The ground acquisition Transmission system 48 is mounted in the frequency conversion tank of well site lifting equipment, together
When wiring provide power supply.
As shown in Fig. 2, 2 connecting with pumping rod 1 of upward-traveling valves assembly of 4 upper end of pump barrel assembly, tubing coupling 3 with it is upper
The oil pipe connection of side, the piston structure lower end inside pump barrel assembly 4 are connect with lower travelling valve assembly 5, the lower end of pump barrel assembly 4 and
Pump barrel box cupling 6 connects, and above section is the pump barrel pumping part of conventional drainage pump.
In conjunction with attached drawing 2 to attached drawing 4, all design structures of the invention in 6 or less part of pump barrel box cupling.It lengthens short
The upper end of section 8 is connect with pump barrel box cupling 6, and the lower end of extension nipple 8 is connect with support tube 11, is equipped with inside extension nipple 8 anti-
Collision block 7；11 lower end of support tube connect transition pipe nipple 13, the transition pipe nipple cable-through hole D 47 of 13 upper end two by seal nipple 28 with
Two cable-through holes of standing valve cover 46 connect, and install fixed valve assembly 12 below standing valve cover 46, and in transition pipe nipple 13
Edema with the heart involved eye 25 is connected, and upper end is fixed by guide ring 10.Underground brshless DC motor 45, motor are installed inside standing valve cover 46
45 top connection disturbance impellers 9, disturbance impeller 9 extend to inside extension nipple 8.
13 outer wall of transition pipe nipple is equipped with cable connection cover board 24, and cable connector 30 and cable connection cover board 24 are close
Envelope connection, the armored cable 26 drawn from cable connector 30 are pressed in crossed beam trunking by fixation clamp 29；Cable connection cover board 24
Lower section is equipped with the installation cabin of ultrasonic transducer 35 side by side, and the cabin for installing cabin by 33 pairs of seal cover board seals, ultrasonic transducer
35 emitting facet face reflecting curtain 37, reflecting curtain 37 are fixed on the lateral sucking of transition pipe nipple 13 by slot cover board 39
At mouth 14, coal powder density monitoring section 38 is formd between ultrasonic transducer 35 and reflecting curtain 37；Ultrasonic transducer 35 is installed
High pressure sealing plug 36 is equipped in cabin, the line of armored cable 26 and the line of ultrasonic transducer 35 are all connected to high pressure sealing plug
On 36, the line of 36 other end of high pressure sealing plug is connect by cable-through hole A23 with aviation plug 15.
13 lower end of transition pipe nipple and protection outer cylinder 18 is tightly connected, and is protected in outer cylinder 18 and is equipped with electronic instrument framework
19 and electric circuit in well module 20, the end face of electronic instrument framework 19 and positioning tube 17 cooperates, and is locked by fixed ring 16.
The lower end of the protection outer cylinder 18 is tightly connected pedestal 21, installs pressure-temperature sensor 22 inside pedestal 21,
The probe segment of pressure-temperature sensor 22 is connect with 21 thread seal of pedestal, the probe segment of pressure-temperature sensor 22 and outer
Portion's connection.
As shown in Fig. 2, transition pipe nipple 13 is that with the key component of pump monitoring device there is connecting cable, coal powder density to supervise
It surveys, draining pump suction inlet side and cross the function that line is connected to upper and lower each pipe nipple.The armored cable 26 is in parallel with oil pipe
Afterwards in tripping in pit shaft, one group of cable box cupling 27 is fixed at interval of two oil pipes, cable box cupling 27 is fixed with oil-pipe external wall, outstanding
Line card slot clasps armored cable 26, locked by screw thread, prevents cable breakdown or moving.
As shown in Fig. 2, armored cable 26 is with cable connector 30 by connecting in cable core lead-in cable connecting cover plate 24,
Cable connection cover board 24 is equipped with sealing element, guarantees that cable core enters the sealing for being inside cable connection cover board 24 from armouring shell
Property.The corresponding cable trough of transition pipe nipple 13 is connected to the ultrasonic transducer of 33 lower part of seal cover board installation cabin by cable-through hole B32,
In the C-C direction view of Fig. 2, the corresponding cable trough of transition pipe nipple 13 is along the circumferential direction set there are two cable-through hole C41, cable-through hole
C41 is connected to two cable-through hole D47 being axially arranged, and is mainly brshless DC motor power supply.
Referring to fig. 2, Fig. 3, the coal powder density monitoring section 38 are located inside transition pipe nipple 13, and ultrasonic transducer 35 is circle
Mounting hole on column bearing structure, with transition pipe nipple 13 seals cooperation；Seal cover board 33 is connect with 13 end face seal of transition pipe nipple
Ultrasonic transducer 35 can be formed and be protected；35 surface of emission of ultrasonic transducer is contacted with well water, the reflection of face suction inlet
Baffle 37, the ultrasonic transducer 35 is since tranmitting frequency is higher, and into the well water for carrying coal dust, attenuation amplitude is larger,
Therefore, control ultrasonic transducer 35 the surface of emission between reflecting curtain at a distance from be no more than 30mm.It is supervised due to entering coal powder density
The well water for surveying area 38 has certain mobility, and the distribution of coal dust impurity is relatively uniform, can timely feedback draining Pump Suction Nozzle
Coal dust variable quantity, monitoring result have direct directive function.The tail portion of ultrasonic transducer 35 is connect with positioning seat 34,
Positioning seat 34 is threadedly coupled with transition pipe nipple 13, can be adjusted by the thread between the surface of emission of ultrasonic transducer 35 and reflecting curtain 37
Distance.It is equipped with subtle slot hole 40 on the reflecting curtain 37 and slot cover board 39, the filtering to well water is played and makees
With preventing larger pulverized coal particle from entering in pump, simplify the structure using wire-wrapped screen.The lead of the cable connector 30 by
Cable-through hole B enters the installation cabin of ultrasonic transducer 35, and all leads are connect with high pressure sealing plug 36, eventually enters into electronic instrument framework
In 19, the effect of high pressure sealing plug 36 is to carry out second protection to electric control part in instrument internal, prevents the infiltration because of top sub
The damage of circuit caused by leakage.
Referring to Fig. 5, the electric circuit in well module 20 includes: power module one, communication unit, main control unit one, data
Storage unit one, temperature measurement unit, pressure measurement cell, concentration measuring unit, drive control unit.Electric circuit in well module 20
Middle power module is each circuit unit power supply in underground；It is real by temperature measurement unit, pressure measurement cell and concentration measuring unit
Existing downhole temperature, pressure and coal powder density measurement；Main control unit one is deposited after encoding measurement data by storage unit one
It stores up and passes through communication unit and measurement data and instrument state are uploaded to ground acquisition Transmission system；When coal powder density reaches setting
After value, main control unit controls direct current generator by drive control unit and works.
Referring to fig. 2, Fig. 4, the interior disturbance assembly of the pump is located at 46 top of standing valve cover, by underground brshless DC motor 45
Extension rod connection disturbance impeller 9, and locked by fixture nut 42.The underground brshless DC motor 45 is customization knot
Structure, shell have bearing capacity, seal and cooperate with standing valve cover 46, and underground brshless DC motor 45 is fixed on by positioning ring 44
In standing valve cover 46, sealing is realized by rotating seal 43 between extension rod and body, it is short that disturbance impeller 9 extends to lengthening
Inside section 8, using PEEK non-metallic material, certain toughness and wearability ensure that, while preventing coal dust impurity absorption.It is brushless
From the cable-through hole B that cable-through hole D47 enters transition pipe nipple 13, the final high pressure sealing plug 36 that accesses enters the lead of direct current generator 45
In electric circuit in well module 20, the seal nipple 28 connected between two cable-through holes has sealing function.When ultrasonic wave coal powder density
When the coal powder density that monitoring pipe nipple measures draining Pump Suction Nozzle increases, disturbance assembly movement, is disturbed in electric circuit in well pipe nipple control pump
The distinctive blade construction of movable vane wheel 9 runs at high speed, and under the influence of centrifugal force, the liquid around blade forms vortex ring, right
Liquid has pressurization in pumping, and with the process of draining pump down stroke, the well water for carrying coal dust impurity is quickly discharged into oil pipe.
Referring to fig. 2, guide ring 10 is threadedly coupled with 11 top of support tube, and first effect is by 46 limiting lock of standing valve cover
Tightly, while inside guide ring 10 it is equipped with guide frame, is flowed into after well water can be made to pass through fixed valve assembly 12 from overcurrent annular space 31
Eddy flow accelerates when in extension nipple 8, while preventing when termination of pumping that coal dust is fallen directly into inside standing valve cover in pump barrel.
Referring to fig. 2, the bumper block 7 of 8 top of extension nipple installation meets the pump that touches fashionable under plunger and requires, and effectively avoids column
The fashionable damage to disturbance assembly in pump under plug, while can guarantee that liquid passes through.
The pedestal 21 is connected to 18 lower section of protection outer cylinder, is mounted on pedestal using temperature, pressure integrated sensor
Among 21, probe segment is connect with the via seal of pedestal 21, can directly measure the temperature and pressure in pit shaft.
Referring to Fig. 5, the ground acquisition Transmission system 48 specifically includes that power module one, downhole communication unit, master control
Unit one, storage unit one, control panel, display interface, data transmission unit and ground communications unit.
Power module one: it powers for downhole instrument and ground acquisition Transmission system 48；System is converted to by power module
Required DC power supply；
Downhole communication unit: main control unit one and ground communications unit are sent to downhole instrument by downhole communication unit and are controlled
System instruction or change instrument parameter, and obtain underground survey data；
Main control unit one: downhole instrument control is realized in the storage of downhole instrument measurement data acquisition；
Storage unit one: apparatus measures data and terrestrial operation record under storage well；Storing data passes through ground communications list
Member is transferred to mobile terminal；
Control panel: man-machine interactive platform realizes that people controls the operation of instrument；It can be live to underground by control panel
Instrument carries out control operation；Measurement data is realized and well site monitoring center by data transmission unit access to remote monitoring system
Data remote transmission.
Display interface: measurement data and instrument state are shown；
Data transmission unit: measurement data remote transmission can access remote monitoring system or mobile terminal；
Ground communications unit: terrestrial mobile terminal controls downhole instrument by ground communications unit or change instrument parameter is logical
Communication interface.
Downhole pumps the included fixed valve arrangement of monitoring device, is connected to below conventional drainage pump pump barrel box cupling, substitutes original
The wire-wrapped screen structure of fixed valve assembly and lower section；Ground acquisition Transmission system is with pump monitoring device by underground armored cable
Power supply, electric circuit in well pipe nipple control pressure and temp monitoring pipe nipple and ultrasonic wave coal dust concentration monitor pipe nipple, real-time monitoring draining pump
Temperature, pressure and coal dust impurity concentration variable quantity near suction inlet, and dynamic oil level is calculated according to pressure value, by underground
Treated that signal is transmitted back in ground acquisition Transmission system by armored cable for main control unit, and is transmitted in the monitoring of well site
The heart, the adjusting and optimizing for mining system provide guidance；It designs to have in downhole pump monitoring device simultaneously and disturbs assembly in pump, work as well
When lower main control unit monitors that current coal powder density rises, automatic control motor drives the disturbance impeller rotation above standing valve cover
Turn, eddy flow liquid carries coal dust impurity and pump chamber is discharged, and realizes actively clean effect in pump；It is capable of the mining of adjoint draining pump,
Realize that permanent reliable downhole parameters monitor function on-line.
1) downhole pump monitoring device overall structure and docked mode described in meet condition of contact in coal bed gas pit shaft, energy
It is enough well to be exchanged with the fixed valve portion of conventional drainage pump, the normal work of draining pump is not influenced.Special be from top to bottom,
It is respectively designed in pump and disturbs assembly, transition pipe nipple, ultrasonic wave coal dust concentration monitor pipe nipple, electric circuit in well pipe nipple, pressure and temp
Pipe nipple is monitored, downhole pumps monitoring device and is connected to below conventional drainage pump pump barrel box cupling by extension nipple, substitutes original solid
The wire-wrapped screen structure for determining valve assembly and lower section realizes the double effects that permanent underground on-line monitoring and active are removed.
2) disturbance assembly is by disturbance impeller assembly, underground brshless DC motor, rotating seal, guiding in the pump described in
Ring, standing valve cover, seal nipple and fixed valve assembly composition.Design has cable-through hole in standing valve cover side wall, passes through seal nipple
It is connected to, can be powered for brshless DC motor with transition pipe nipple, control disturbance impeller rotation, wherein disturbance impeller is non-using PEEK
Metal material, the absorption of underground electrification pulverized coal particle when effectively preventing not turning, when underground, main control unit monitors coal powder density
When rising a certain amount of, disturbance impeller rotation is automatically controlled, eddy flow liquid carries coal dust and enters oil pipe, prevents coal dust heavy in pump
Product.
3) transition pipe nipple described in constitutes the main body of downhole pump monitoring device, and outside is connect with pump barrel box cupling, internal
It is connect with disturbance assembly end face in pump.Transition pipe nipple upper design has cable connection cover board to connect for fixing underground armored cable
Head, and realize the transition seal between cable core and instrument cabin；Design has ultrasonic wave coal dust concentration monitor pipe nipple in the middle part of transition pipe nipple
With lateral suction inlet, suction inlet design has reflecting curtain and slot cover board, and reflecting curtain is mainly used for having ultrasonic transducer transmitting
The reflection of wave, slot cover board can be filtered the impurity of Pump Suction Nozzle, and function is equal to wire-wrapped screen, and down-hole liquid is logical
It crosses slot cover board and central ports is entered by lateral suction inlet, enter in pump finally by fixed valve assembly；Transition pipe nipple lower part is set
In respect of line interface and sealing structure is crossed, between protection is sealed upper and lower cabin, circuit caused by preventing top seal from failing is broken
It is bad.
4) the coal powder density monitoring pipe nipple described in is parallel with lateral suction inlet, and 1 high frequency ultrasound is equipped in cover board cabin and is changed
Energy device has certain distance with reflecting curtain, carries the well water of coal dust by entering monitoring section domain after lateral suction inlet, due to stream
Body has certain flow velocity, the uniformity of basic guarantee solid phase particles distribution.Concentration measuring unit excitation in circuit module
Ultrasonic transducer emits ultrasonic wave to reflecting curtain, and behind monitoring region, acoustic beam and the well water for carrying coal dust occur diffusion, dissipate
It penetrates, after viscous absorption, reflected sound width is decayed, and monitoring echo-signal decaying judgement draining Pump Suction Nozzle coal dust is passed through
Concentration variation.Under different temperatures, pressure condition, the relationship of coal powder density and echo sound width attenuation coefficient, mainly passes through in well water
A large amount of laboratory test obtains, and corresponding relationship and correction factor have been written into underground primary control program, ensure that the reliable of monitoring
Property.
5) electric circuit in well pipe nipple described in is that each circuit unit in underground is powered by power module, by temperature measurement unit,
Pressure measurement cell and concentration measuring unit realize downhole temperature, pressure and coal powder density measurement；Main control unit is by measurement data
Store by storage unit after coding and monitoring data are uploaded to by ground acquisition Transmission system by downhole communication unit；
After coal powder density reaches setting value, main control unit controls brshless DC motor by drive control unit and works.
6) the pressure and temp monitoring pipe nipple described in is connected to below electric circuit in well pipe nipple, is passed using temperature, pressure integrated
Sensor is mounted among pipe nipple, and probe segment is connect with the via seal of pipe nipple bottom, can directly measure the temperature in pit shaft
And pressure.
7) the ground acquisition Transmission system described in specifically includes that power supply unit, downhole communication unit, main control unit, storage
Unit, man-machine interaction unit, display unit, data transmission unit and ground communications unit.Ground acquisition Transmission system is by exchanging
Power supply power supply is converted to DC power supply needed for system by power module；Main control unit and ground communications unit can pass through underground
Communication unit sends control instruction, changes instrument parameter and obtains underground survey data to downhole instrument；Measurement data and instrument
Status data is shown in display interface, and is stored in storage unit；Storing data is transferred to by ground communications unit
Mobile terminal；Live control operation can be carried out to downhole instrument by control panel；Measurement data is connect by data transmission unit
Enter remote monitoring system, realizes the data remote transmission with well site monitoring center.
The working principle of the invention is:
Downhole pump monitoring device is connected to conventional drainage pump pump barrel assembly lower part and is adopted with oil pipe lower going-into-well bottom by ground
Collecting Transmission system by underground armored cable is to monitor system power supply with pump, realizes permanent downhole parameters monitoring.Electric circuit in well
For module after each upstroke of draining pump starts, excitation ultrasound energy converter emits ultrasonic wave to fixed baffle, and acquisition is worked as in real time
Preceding temperature and pressure is conversed using the relationship of well water concentration and the decaying of sound width when draining Pump Suction Nozzle coal dust impurity concentration becomes
Change amount, while dynamic liquid level height is calculated according to institute's measuring pressure value, the temperature monitored, pressure, coal powder density variation, hydrodynamic face are high
The parameters such as degree are returned in ground acquisition Transmission system by armored cable real-time Transmission, and pass through data transmission unit for real time data
It is transmitted to well site monitoring center；It is automatic to drive disturbing above standing valve cover when main control unit monitoring coal powder density in underground rises
The rotation of movable vane wheel, realizes flow disturbance in pumping, and makes to pump miscellaneous adjoint the pumping process of interior coal dust and is discharged into oil pipe, prevents coal dust from sinking in pump
It is stifled to manufacture into pump.
Above by reference to attached drawing and embodiment, schematic description of the technical scheme of the invention is schematically described, which does not limit
Property processed, those skilled in the art should understand that, in practical applications, each technical characteristic in the present invention may occur certain
The variation of structure or shape, and other staff may also make similar Design under its enlightenment.In particular, it should be pointed out that: as long as
Spirit of the invention, all obvious variations in detail or similar Design are not departed from, protection scope of the present invention is all contained in
Within.
Claims (10)
1. a kind of coal bed gas extraction downhole pumps monitoring device, including ground acquisition Transmission system (48), well mouth sealing device
(49), armored cable (26), cable box cupling (27), tubing and casing annular space (50), pump barrel assembly (4), pump in disturbance assembly (51) and
With pump monitoring device (52)；
It is described with being disturbed in pump monitoring device (52) and pump after assembly (51) connect, be mounted on the pump barrel assembly (4) of draining pump
Lower section；Described armored cable (26) one end passes through after cable connector (30) are connect with pump monitoring device (52) with oil pipe tripping in
Shaft bottom, armored cable (26) are distributed in tubing and casing annular space (50), and armored cable (26) is solid by cable box cupling (27) and oil pipe
It is fixed；The signal wire of described armored cable (26) upper end draw well mouth sealing device (49) afterwards with ground acquisition Transmission system (48)
Connection；
Internal upward-traveling valves assembly (2) connecting with pumping rod (1) of the pump barrel assembly (4), the oil of tubing coupling (3) and top
Pipe connection, the lower end of pump barrel assembly (4) is connect with pump barrel box cupling (6)；
Pump barrel box cupling (6) lower end is connect with the upper end of extension nipple (8), the lower end of extension nipple (8) and support tube
(11) it connects；Bumper block (7) are equipped in extension nipple (8)；Support tube (11) lower end connects transition pipe nipple (13)；Transition pipe nipple
(13) two cable-through hole D(47 of upper end) it is connect by seal nipple (28) with two cable-through holes on standing valve cover (46)；Gu
Determine that fixed valve assembly (12) are installed below valve bonnet (46), fixed valve assembly (12) and the central ports (25) of transition pipe nipple (13) are led
Logical, the upper end of fixed valve assembly (12) is fixed by guide ring (10)；Design has underground brushless dc in standing valve cover (46)
Machine (45), brshless DC motor (45) top connection disturbance impeller (9), disturbance impeller (9) extend in extension nipple (8)；
Transition pipe nipple (13) outer wall is equipped with cable connection cover board (24), cable connection cover board (24) and cable connector
(30) it is tightly connected, the armored cable (26) drawn from cable connector (30) is pressed in crossed beam trunking by fixation clamp (29)；
The installation cabin of ultrasonic transducer (35), the cabin in seal cover board (33) sealing installation cabin are equipped with below cable connection cover board (24) side by side
Body；The generation end face of ultrasonic transducer (35) faces reflecting curtain (37), and reflecting curtain (37) is solid by slot cover board (39)
It is scheduled at the lateral suction inlet (14) of transition pipe nipple (13), forms coal dust between ultrasonic transducer (35) and reflecting curtain (37)
Concentration monitor area (38)；Ultrasonic transducer (35) install cabin in be equipped with high pressure sealing plug (36), the line of armored cable (26) and
The line of ultrasonic transducer (35) is all connected on high pressure sealing plug (36), and the line of high pressure sealing plug (36) other end passes through
Cable-through hole A(23) it is connect with aviation plug (15)；
Transition pipe nipple (13) lower end is connect with protection outer cylinder (18), is equipped with electronic instrument framework (19) in protection outer cylinder (18)
With electric circuit in well module (20), the end face of electronic instrument framework (19) and positioning tube (17) cooperates, and is locked by fixed ring (16)；
Protection outer cylinder (18) lower end and pedestal (21) is tightly connected, and pressure-temperature sensor is equipped with inside pedestal (21)
(22), the probe segment of pressure-temperature sensor (22) is connect with pedestal (21), and pedestal (21) is equipped with the hole being connected to outside,
The probe segment that the temperature and pressure of well water can be transferred to pressure-temperature sensor (22) by pore is monitored.
2. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that the armouring
After cable (26) is in parallel with oil pipe in tripping in pit shaft, one group of cable box cupling (27), cable box cupling are fixed at interval of two oil pipes
(27) it is fixed with oil-pipe external wall, line card slot clasps armored cable (26)；
The armored cable (26) by cable connector (30) by cable core lead-in cable connecting cover plate (24), cable connection
Cover board (24) is equipped with sealing element；The corresponding cable trough of transition pipe nipple (13) and ultrasonic transducer installation cabin pass through cable-through hole B
(32) it is connected to；The corresponding cable trough of transition pipe nipple (13) is along the circumferential direction set there are two cable-through hole C(41), cable-through hole C(41) with
Two cable-through hole D(47 being axially arranged) connection.
3. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that the ultrasound
Energy converter (35) is cylinder bearing structure, and the mounting hole on ultrasonic transducer (35) and transition pipe nipple (13), which seals, to be cooperated, and is led to
It is fixed to cross positioning seat (34)；Seal cover board (33) is connect with transition pipe nipple (13) end face seal；Ultrasonic transducer (35) surface of emission
It is contacted with well water, the reflecting curtain (37) at the lateral suction inlet of face (14), the surface of emission of ultrasonic transducer (35) and reflection are kept off
Distance between plate (37) is no more than 30mm；
The guide ring (10) is threadedly coupled with support tube (11) top.
4. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that the cable
The lead of connector (30) is entered the installation cabin of ultrasonic transducer (35), all leads and high pressure sealing plug by cable-through hole B(32)
(36) it connects, into electric circuit in well pipe nipple.
5. a kind of coal bed gas extraction downhole according to claim 3 pumps monitoring device, which is characterized in that the ultrasound
The tail portion of energy converter (35) is connect with positioning seat (34), and positioning seat (34) is threadedly coupled with transition pipe nipple (13), is connected by screw thread
Connect the surface of emission of adjustable ultrasonic transducer (35) between reflecting curtain (37) at a distance from.
6. a kind of coal bed gas extraction downhole according to claim 3 pumps monitoring device, which is characterized in that the reflection
Slot hole (40) are equipped on baffle (37) and slot cover board (39).
7. a kind of coal bed gas extraction downhole according to claim 4 pumps monitoring device, which is characterized in that the underground
Circuit module (20) includes: power module two, communication unit, main control unit two, storage unit two, temperature measurement unit, pressure
Measuring unit, concentration measuring unit, drive control unit and direct current generator；Power module two in electric circuit in well module (20) is
Each circuit unit power supply in underground；Downhole temperature, pressure are realized by temperature measurement unit, pressure measurement cell and concentration measuring unit
Power and coal powder density measurement；Main control unit two is stored after encoding measurement data by storage unit two, and passes through communication
Measurement data and instrument state are uploaded to ground acquisition Transmission system 48 by unit；After coal powder density reaches setting value, master control
Unit two-way overdrive control unit control direct current generator work.
8. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that in the pump
Disturbance assembly (51) is located above standing valve cover (46), by the extension rod connection disturbance impeller of underground brshless DC motor (45)
(9), it and by fixture nut (42) locks.
9. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that the underground
Brshless DC motor (45) and standing valve cover (46) sealing cooperate, and underground brshless DC motor (45) is fixed by positioning ring (44)
In standing valve cover (46), sealing is realized by rotating seal (43) between extension rod and body；Impeller (9) are disturbed to use
PEEK non-metallic material；The lead of brshless DC motor (45) enters the cable-through hole B(of transition pipe nipple (13) from cable-through hole D(47)
32) in, then high pressure sealing plug (36) is accessed and are entered in electric circuit in well module (20).
10. a kind of coal bed gas extraction downhole according to claim 1 pumps monitoring device, which is characterized in that the ground
Face acquiring and transmission system (48) specifically includes that power module one, downhole communication unit, main control unit one, storage unit one, control
Panel, display interface, data transmission unit and ground communications unit；
Downhole communication unit, main control unit one and ground communications unit send control to downhole instrument by downhole communication unit and refer to
Enable or change instrument parameter；
Main control unit one is stored for downhole instrument measurement data acquisition, realizes downhole instrument control；
Storage unit one, for apparatus measures data under storage well and terrestrial operation record；
Control panel is used for man-machine interactive platform, realizes that people controls the operation of instrument；
Display interface is shown for measurement data and instrument state；
Data transmission unit is used for measurement data remote transmission, can access remote monitoring system or mobile terminal；
Ground communications unit controls downhole instrument by ground communications unit for terrestrial mobile terminal or change instrument parameter is logical
Communication interface.
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| CN111119870B (en) * | 2019-12-30 | 2021-07-13 | 中国科学院武汉岩土力学研究所 | Drilling surrounding rock structure detection device and method based on sound wave circumferential scanning |
| CN112392544B (en) * | 2020-11-13 | 2023-11-03 | 吕梁腾翼信息科技有限公司 | Underground monitoring and early warning device for coal bed gas drainage and gas production |
| CN114033495A (en) * | 2021-10-25 | 2022-02-11 | 北京金圣奥能源技术有限公司 | Cable throwing and fishing type underground permanent storage pressure gauge |
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