CN203783569U - Hydrofracturing underground digitized data collecting system - Google Patents
Hydrofracturing underground digitized data collecting system Download PDFInfo
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- CN203783569U CN203783569U CN201420173777.3U CN201420173777U CN203783569U CN 203783569 U CN203783569 U CN 203783569U CN 201420173777 U CN201420173777 U CN 201420173777U CN 203783569 U CN203783569 U CN 203783569U
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a hydrofracturing underground digitized data collecting system which comprises a high-pressure pump, a flowmeter and a hydraulic pressure pipe. The high-pressure pump and the flowmeter are arranged on the ground, the hydraulic pressure pipe is arranged to go deep into an underground, and the hydraulic pressure pipe penetrates through a fracturing section which is plugged through a bridge joint packer on the underground. A water injection valve is arranged on the portion, where the fracturing section is placed, on the hydraulic pressure pipe, and an underground switch is arranged on the portion, above the bridge joint packer, on the hydraulic pressure pipe. The lower end of the hydraulic pressure pipe penetrates through the lower portion of the bridge joint packer and is connected with the digitized data collecting system. A pressure sensor and a digital collecting circuit are integrated in the underground digitized data collecting system. A water outlet in the lower end of the hydraulic pressure pipe is connected with the input end of the pressure sensor, the output end of the pressure sensor is connected with the digital collecting circuit, and an end connector is arranged in the digital collecting circuit. More true in-situ stress information can be acquired, and more accurate base materials can be provided for study on a stress field.
Description
Technical field
The utility model relates to a kind of hydraulic fracturing stress measurement technology, relates in particular to a kind of hydrofracturing down-hole digital data acquisition system that can obtain fracturing section true pressure changing value.
Background technology
At present, in hydraulic fracturing stress measurement in fracturing process, record pressure over time by the pressure sensor aboveground and data logger, then extract relevant parameter according to pressure time recording curve, after theory converts, obtain the size of original place main stress bar.
As shown in Figure 1a, for hydraulic fracturing stress measurement system schematic diagram in prior art, its method is to utilize a pair of swellable packer in the selected one section of boring of packing that fathoms, then pump into fluid to this test section (often claiming fracturing section) supercharging, utilize data logger to record pressure, flow over time simultaneously, finally obtain the size of original place main stress bar according to pressure time curve, determine in the orientation of breaking that main stress bar orientation can be determined according to die.In figure: data logger 1, for recording and the synchronous variation of monitoring pressure, flow, comprises X-Y recorder, magnetic tape recorder and data acquisition unit; High-pressure pump 2 is for pumping into fluid; Pressure sensor 3 monitoring pressures change; Flow meter 4 is monitored pump pressure speed; Power conduit 5 is fluid passages; Wellhead casing pipe 6 is for the protection of power conduit 5 and downhole hardware; Down-hole switch 7 realize down-hole setting, close and pressure conversion, convenient and swift; Straddle packer 8 packing fracturing sections 9, also claim test section; Water filling valve 10 for power conduit 5 to test section 9 water fillings; Boring 11.Can be found out by Fig. 1 a, pressure sensor 3 is placed in aboveground, in measuring process, records the time dependent curve of pressure by the data logger 1 being attached thereto.
At least there is following defect in above-mentioned prior art:
Due to the distortion of drilling rod and packer, the impact in hole distortion, fluid compression, pump pressure speed and remaining crack etc., the measured force value of aboveground pressure sensor can not reflect the real change value of pressure of underground fracture section accurately, and the original place main stress bar value that the parameter of extracting from its pressure time recording curve is calculated has larger difference with real original place main stress bar value.
Utility model content
The purpose of this utility model is to provide a kind of hydrofracturing down-hole digital data acquisition system that can obtain fracturing section true pressure changing value.
The purpose of this utility model is achieved through the following technical solutions:
Hydrofracturing of the present utility model down-hole digital data acquisition system, comprise and be located at aboveground high-pressure pump and flow meter, go deep into the power conduit of down-hole, described power conduit passes through the fracturing section of straddle packer packing through down-hole, described power conduit is provided with Water filling valve at described fracturing section place, described power conduit is provided with down-hole switch on the top of described straddle packer, the lower end of described power conduit is passed the bottom of described straddle packer and is connected with down-hole digital data acquisition system, in the digital data acquisition system of described down-hole, be integrated with pressure sensor and digital acquisition circuit, the lower end delivery port of described power conduit is connected with the input of described pressure sensor, the output of described pressure sensor is connected with described digital acquisition circuit, described digital acquisition circuit is provided with end interface.
The technical scheme being provided from above-mentioned the utility model, hydrofracturing of the present utility model down-hole digital data acquisition system, due to pressure sensor is moved to down-hole, integrated with digital acquisition circuit, form a set of down-hole digital data acquisition system, be placed in lower packet bottom, by system water inlet, pressure sensor is directly communicated with fracturing section, thereby can obtain more real original place stress information, for the research of tectonic stress field provides basic data more accurately.
Brief description of the drawings
Fig. 1 a is the layout schematic diagram of hydraulic fracturing stress measurement system in prior art;
The layout schematic diagram of the hydrofracturing down-hole digital data acquisition system that Fig. 1 b provides for the utility model embodiment;
Fig. 2 is down-hole digital data acquisition entire system structure design schematic diagram in the utility model embodiment;
Fig. 3 is down-hole digital data acquisition circuit system design diagram in the utility model embodiment.
Detailed description of the invention
Below the technical scheme in the utility model embodiment is clearly and completely described.
Hydrofracturing of the present utility model down-hole digital data acquisition system, its preferably detailed description of the invention be:
Comprise and be located at aboveground high-pressure pump and flow meter, go deep into the power conduit of down-hole, described power conduit passes through the fracturing section of straddle packer packing through down-hole, described power conduit is provided with Water filling valve at described fracturing section place, described power conduit is provided with down-hole switch on the top of described straddle packer, the lower end of described power conduit is passed the bottom of described straddle packer and is connected with down-hole digital data acquisition system, in the digital data acquisition system of described down-hole, be integrated with pressure sensor and digital acquisition circuit, the lower end delivery port of described power conduit is connected with the input of described pressure sensor, the output of described pressure sensor is connected with described digital acquisition circuit, described digital acquisition circuit is provided with end interface.
Described down-hole digital data acquisition system comprises by storehouse in the system of pedestal, probe urceolus and the sealing of end sealing cap, described pressure sensor is fixed on described pedestal, described pedestal is provided with water inlet, and the outer end of described water inlet is connected with the lower end delivery port of described power conduit, the inner is connected with the input of described pressure sensor.
Described end interface comprises that RS232 EBI, power supply discharge and recharge interface and contactor interface.
The outside of described digital acquisition circuit scribbles circuit protection glue.
In described system, storehouse is provided with power supply draw-in groove, in described power supply draw-in groove, is fixed with power supply, and described digital acquisition circuit is fixed on described pedestal by assembling column.
Described power supply is high capacity polymer lithium electronic power supply.
Described digital acquisition circuit comprises the stimulus part, data processing section, the terminal control part that connect successively.
Described stimulus part comprises four paths, and every paths is connected with the output of described pressure sensor respectively.
Described data processing section comprises the signals collecting/modulate circuit, amplifying circuit, A/D change-over circuit, the AM7 microcontroller that connect successively.
Described data processing section also comprises real time clock circuit, power module/reference power supply, mass storage, watchdog circuit.
Specific embodiment:
As shown in Figure 1 b, high-pressure pump 2 is for pumping into fluid; Flow meter 4 is monitored pump pressure speed; Power conduit 5 is fluid passages; Wellhead casing pipe 6 is for the protection of power conduit 5 and downhole hardware; Down-hole switch 7 realize down-hole setting, close and pressure conversion, convenient and swift; Straddle packer 8 packing fracturing sections 9, also claim test section; Water filling valve 10 for power conduit 5 to test section 9 water fillings; Down-hole digital data acquisition system 12; Boring 11.
Pressure sensor 3 monitoring pressures change, be integrated in down-hole digital data acquisition system 12, precision is high, size is little, integrated with digital acquisition circuit, form the down-hole digital data acquisition system 12 of a set of high accuracy high-accuracy, replace data logger of the prior art, be placed in the lower packet bottom of straddle packer 8, by system water inlet, pressure sensor 3 is directly communicated with fracturing section 9, thereby solve the problem that aboveground pressure sensor measured value in existing hydraulic fracturing stress measurement process can not accurately reflect underground fracture section 9 true pressure values.
As shown in Figure 2, digital data acquisition system in down-hole mainly comprises:
End sealing cap 21, is used for hermetic terminal interface 24; End trip bolt 22, cooperative end part sealing cap 21 hermetic terminal interfaces 24; End part seal O type circle 23, cooperative end part sealing cap 21 hermetic terminal interfaces 24; End interface 24, comprises that RS232 EBI, power supply discharge and recharge interface and contactor interface; System probe urceolus 25, for storehouse in sealing and protection system; Wire 26, connects end interface 24 and digital acquisition circuit 28; Circuit protection glue 27, high temperature resistant, for circuit board protection against the tide, anticorrosion, insulation etc.; Digital acquisition circuit 28, realizes collection, analyzing and processing and the storage of sensor signal; Power supply draw-in groove 29, for placing and fixed power source; Power supply 210, high capacity polymer lithium electronic power supply, precision high stability is good; Pressure sensor 3, input is connected with system water inlet 217, and output is connected with digital acquisition circuit 28; Assembling column 212, for supporting and stationary digital Acquisition Circuit 28; Sensor interface 213, for installing and fixation pressure sensor; Pedestal sealing O type circle 214, coordinates storehouse in 25 sealings of probe urceolus; Urceolus trip bolt 215, coordinates storehouse in 25 sealings of probe urceolus; Pedestal 216, is integrated with digital acquisition circuit 28, power supply 210 and pressure sensor 3 on it; Water inlet 217, is connected with pressure sensor 3 inputs.
As shown in Figure 3, be down-hole digital data acquisition circuit system design frame chart, mainly comprise:
Stimulus part: four paths 31 can receive at most No. four sensor outputting analog signals simultaneously;
Data processing section: signals collecting/conditioning 32, by the conditioning to input signal, makes measured signal be suitable for the requirement of A/D change-over circuit; Amplifying circuit 33, filtered noise signal, amplified analog signal; A/D conversion 34, adopts 16 A/D converter part AD974, and precision is high, and conversion speed is fast; AM7 microcontroller 35, adopts low-power consumption ARM7 chip LPC2214; Real-time clock 36, adopts real-time clock SD2303AP, and clock accuracy is ± 5ppm that a year error is less than 2.5 minutes; Power module/reference power supply 37, adopts low noise, high-precision reference voltage source circuit; Mass storage 38, adopts and has the non-volatile FRAM memory of 4M FM22L16; Watchdog circuit 39, control circuit is changed between programming mode and user model;
Terminal control part: ground visual software 310.
The utility model mainly contains two aspects to the improvement of existing hydraulic fracturing stress measurement technology:
On the one hand, aboveground pressure sensor is moved to down-hole, be placed in lower packet bottom, directly communicate with fracturing section, avoid the distortion of drilling rod and packer, boring distortion, fluid compression, the impact on pressure measurements such as pump pressure speed and remaining crack, on the other hand, design intelligentized digital collection circuit, integrated with pressure sensor, form probe and be placed in down-hole, replace existing hydraulic fracturing records pressure time curve mode by ground data logger, acquisition precision is higher, reading speed is faster, memory capacity is larger, real-time is stronger, and simplify the flow process of Hydraulic Fracturing Stress Measurements site work, thereby lay good basis for obtaining true original place main stress bar information.
In the digital data acquisition system of down-hole, mainly comprise:
1. the Machine Design of system probe, the Integrated design of the each functional unit of system; Probe Machine Design mainly comprises probe urceolus, pedestal, end sealing cap, end interface, power supply draw-in groove, assembling column, sensor interface and water inlet etc.End sealing cap, probe urceolus and pedestal are combined closely and have been formed the interior storehouse of system of a sealing.The end interface of probe tip comprises that RS232 EBI, power supply discharge and recharge interface and contactor interface, is connected by wire with digital acquisition circuit, realizes system and upper computer software communication, power supply and discharges and recharges and open the functions such as closed.In storehouse, pedestal upper end is respectively equipped with power supply draw-in groove, assembling column, sensor interface, and power supply, digital acquisition circuit and pressure sensor can be localized and integrated on pedestal independently of each other.Pedestal lower end is provided with water inlet, communicates with sensor interface, makes pressure sensor can directly measure fracturing section change value of pressure.End sealing cap is hermetic terminal interface before lower well measurements, when aboveground parameters and peek, opens it host computer is connected with 4 end interfaces.Down-hole digital data acquisition system has strict requirement to the size of the each ingredient of system, probe external diameter, pedestal internal diameter, circuit PCB design, size sensor, power supply size etc. are all as far as possible little in meeting system accuracy and accuracy requirement, so that the demand of the head coincidence detection of integrated rear formation hydrofracturing underground survey instantly.
2. insulation and the moistureproof design of the high pressure sealing design of system, circuit.The main high pressure sealing that relies on three aspects: to design the system that realizes, the one, system probe urceolus and pedestal seal storehouse in O type circle, the sealing of urceolus trip bolt by pedestal, two is that 1 end sealing cap and system urceolus pass through end trip bolt, end part seal O type circle hermetic terminal interface, the 3rd, and the importation that pressure sensor is connected with water inlet is close to close screw thread and pad compression seal.Digital acquisition circuit is closely wrapped up by circuit protection glue, thereby plays the effect of electrical isolation, insulation protection, also can prevent corrosion and the infringement of down-hole wet environment to circuit.
In the design of down-hole digital data acquisition circuit system, mainly comprise stimulus part, data processing section, terminal control part, be introduced respectively below:
Stimulus part: have four paths, can accept No. four sensor outputting analog signals simultaneously.The pressure sensor dimensions that native system adopts is little, and precision is high, and input pressure value maximum can reach 35Mp, and input and output have extraordinary linear relationship.
Data processing section: signals collecting/conditioning, amplifying circuit, adopts electromagnetic isolation technology, makes isolation mutually between input, output and power supply, then by filtering, amplification, makes measured signal meet the demand of A/D conversion.A/D conversion portion adopts high accuracy and high-resolution 16 A/D converter part AD974, its built-in four-way input multiplexer, a successive approximation switching capacity ADC, a 2.5V internal reference voltage source and a HSSI High-Speed Serial Interface.Central control unit adopts low-power consumption 5ARM7 chip LPC2214, supports real-time simulation and Embedded Trace, adapts to that volume is little, integrated level is high, fast operation and the requirement of system design accurately measured.Reference voltage source is selected to bury Zener type, and its low noise, high-precision characteristic are ensured A/D output accuracy.Mass storage adopts has the non-volatile FRAM memory of 4M FM22L16, FM22L16 and asynchronous static RAM (SRAM) (SRAM) are compatible on pin, the time of access is 55ns, and the cycle is 110ns, and durability is at least 100 TFlops and writes and the data hold capacity of 10 years.Aspect the plate-making of PCB cloth version: take 4 layers of printed board form, interior bus plane is arranged complete ground plane, another layer of internal layer is arranged bus plane; Power supply chip is in the layout of plank front end, and the device of power consumption is arranged near power unit; Benchmark, amplifying circuit, analog switch etc. are in the layout of near sensor incoming end; Reduce ground wire resistance drop, circuit board Copper Foil thickness is not more than 1.5 ounces.
Terminal control part: exploitation ground visual software, can realize following functions: 1. arrange and the various parameters of reading system: such as frequency acquisition, channel selecting, sensitivity coefficient and measurement start the end time etc., and can show the information such as real-time clock, battery electric quantity; 2. can read in real time multiple channel pressure data, the real-time continuous that realizes pressure data curve shows, and display window has vernier capturing function, can show the measured value of random time point; 3. after measurement finishes, can concentrate and receive data and draw y (t) curve, both directly output prints, also can export as Excel file.This software and Acquisition Circuit are carried out communication by RS232 serial ports, and this serial ports adopts the MAX3221E of MAXIM company, low-power consumption, static electrification safeguard function.
The above; it is only preferably detailed description of the invention of the utility model; but protection domain of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (10)
1. a hydrofracturing down-hole digital data acquisition system, comprise and be located at aboveground high-pressure pump and flow meter, go deep into the power conduit of down-hole, described power conduit passes through the fracturing section of straddle packer packing through down-hole, described power conduit is provided with Water filling valve at described fracturing section place, described power conduit is provided with down-hole switch on the top of described straddle packer, it is characterized in that, the lower end of described power conduit is passed the bottom of described straddle packer and is connected with down-hole digital data acquisition system, in the digital data acquisition system of described down-hole, be integrated with pressure sensor and digital acquisition circuit, the lower end delivery port of described power conduit is connected with the input of described pressure sensor, the output of described pressure sensor is connected with described digital acquisition circuit, described digital acquisition circuit is provided with end interface.
2. hydrofracturing according to claim 1 down-hole digital data acquisition system, it is characterized in that, described down-hole digital data acquisition system comprises by storehouse in the system of pedestal, probe urceolus and the sealing of end sealing cap, described pressure sensor is fixed on described pedestal, described pedestal is provided with water inlet, and the outer end of described water inlet is connected with the lower end delivery port of described power conduit, the inner is connected with the input of described pressure sensor.
3. hydrofracturing according to claim 2 down-hole digital data acquisition system, is characterized in that, described end interface comprises that RS232 EBI, power supply discharge and recharge interface and contactor interface.
4. hydrofracturing according to claim 3 down-hole digital data acquisition system, is characterized in that, the outside of described digital acquisition circuit scribbles circuit protection glue.
5. hydrofracturing according to claim 4 down-hole digital data acquisition system, is characterized in that, in described system, storehouse is provided with power supply draw-in groove, in described power supply draw-in groove, is fixed with power supply, and described digital acquisition circuit is fixed on described pedestal by assembling column.
6. hydrofracturing according to claim 5 down-hole digital data acquisition system, is characterized in that, described power supply is high capacity polymer lithium electronic power supply.
7. according to the hydrofracturing down-hole digital data acquisition system described in claim 1 to 6 any one, it is characterized in that, described digital acquisition circuit comprises the stimulus part, data processing section, the terminal control part that connect successively.
8. hydrofracturing according to claim 7 down-hole digital data acquisition system, is characterized in that, described stimulus part comprises four paths, and every paths is connected with the output of described pressure sensor respectively.
9. hydrofracturing according to claim 7 down-hole digital data acquisition system, is characterized in that, described data processing section comprises the signals collecting/modulate circuit, amplifying circuit, A/D change-over circuit, the AM7 microcontroller that connect successively.
10. hydrofracturing according to claim 9 down-hole digital data acquisition system, is characterized in that, described data processing section also comprises real time clock circuit, power module/reference power supply, mass storage, watchdog circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420173777.3U CN203783569U (en) | 2014-04-10 | 2014-04-10 | Hydrofracturing underground digitized data collecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420173777.3U CN203783569U (en) | 2014-04-10 | 2014-04-10 | Hydrofracturing underground digitized data collecting system |
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| CN203783569U true CN203783569U (en) | 2014-08-20 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594867A (en) * | 2015-01-06 | 2015-05-06 | 中国科学院武汉岩土力学研究所 | Hydraulic fracturing pipe with sealing device |
| CN105489106A (en) * | 2016-01-08 | 2016-04-13 | 河南理工大学 | Hard roof water-injection softening laboratorial simulation system and method |
| CN106499360A (en) * | 2016-12-27 | 2017-03-15 | 中煤科工集团重庆研究院有限公司 | Underground coal mine hydraulic fracturing drilling and sealing device |
| CN109357942A (en) * | 2018-09-19 | 2019-02-19 | 三峡大学 | A kind of accurate principal stress constructs the device and method of fine stress field |
| CN110080740A (en) * | 2019-05-21 | 2019-08-02 | 中煤科工集团西安研究院有限公司 | A kind of method and system detecting down-hole coal bed gas fracturing effect |
| CN110741133A (en) * | 2017-04-12 | 2020-01-31 | 沙特阿拉伯石油公司 | System and method for sealing a wellbore |
| CN112983380A (en) * | 2021-04-16 | 2021-06-18 | 中国矿业大学 | Digital hydraulic fracturing monitoring equipment |
-
2014
- 2014-04-10 CN CN201420173777.3U patent/CN203783569U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594867A (en) * | 2015-01-06 | 2015-05-06 | 中国科学院武汉岩土力学研究所 | Hydraulic fracturing pipe with sealing device |
| CN105489106A (en) * | 2016-01-08 | 2016-04-13 | 河南理工大学 | Hard roof water-injection softening laboratorial simulation system and method |
| CN105489106B (en) * | 2016-01-08 | 2018-02-13 | 河南理工大学 | A kind of laboratory simulation tight roof water filling melded system and method |
| CN106499360A (en) * | 2016-12-27 | 2017-03-15 | 中煤科工集团重庆研究院有限公司 | Underground coal mine hydraulic fracturing drilling and sealing device |
| CN110741133A (en) * | 2017-04-12 | 2020-01-31 | 沙特阿拉伯石油公司 | System and method for sealing a wellbore |
| CN109357942A (en) * | 2018-09-19 | 2019-02-19 | 三峡大学 | A kind of accurate principal stress constructs the device and method of fine stress field |
| CN110080740A (en) * | 2019-05-21 | 2019-08-02 | 中煤科工集团西安研究院有限公司 | A kind of method and system detecting down-hole coal bed gas fracturing effect |
| CN110080740B (en) * | 2019-05-21 | 2021-08-17 | 中煤科工集团西安研究院有限公司 | Method and system for detecting hydraulic fracturing effect of underground coal bed gas |
| CN112983380A (en) * | 2021-04-16 | 2021-06-18 | 中国矿业大学 | Digital hydraulic fracturing monitoring equipment |
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Address after: 100085, Anning Road, Haidian District, Beijing, 1, Xisanqi Patentee after: National natural disaster prevention and Control Research Institute Ministry of emergency management Address before: 100085, Anning Road, Haidian District, Beijing, 1, Xisanqi Patentee before: THE INSTITUTE OF CRUSTAL DYNAMICS, CHINA EARTHQUAKE ADMINISTRATION |
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Granted publication date: 20140820 |
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