CN107143324B - Frequency difference type infrasonic wave generator for measuring working fluid level of oil well - Google Patents
Frequency difference type infrasonic wave generator for measuring working fluid level of oil well Download PDFInfo
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- CN107143324B CN107143324B CN201710527362.XA CN201710527362A CN107143324B CN 107143324 B CN107143324 B CN 107143324B CN 201710527362 A CN201710527362 A CN 201710527362A CN 107143324 B CN107143324 B CN 107143324B
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- infrasonic wave
- ultrasonic
- infrasonic
- outer cylinder
- transducer
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
- E21B47/047—Liquid level
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
A frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well consists of an ultrasonic wave transmitting device and an infrasonic wave synthesizing device which are connected through a lower joint of an energy converter; the ultrasonic transmitting device comprises an ultrasonic outer cylinder, one end in the outer cylinder is provided with an upper joint of the energy converter, a transmission line is embedded in the upper joint and connected with one end of the ultrasonic energy converter, and the other end of the ultrasonic energy converter penetrates through a lower joint of the energy converter; the infrasonic wave synthesizer comprises an infrasonic wave outer cylinder, one end of the outer cylinder is externally connected with a lower joint of the transducer, an infrasonic wave synthesizer is arranged in the other end of the outer cylinder, and the lower joint, the infrasonic wave outer cylinder and the infrasonic wave synthesizer form a cavity; the infrasonic wave synthesizer comprises a control unit ARM, and an address bus, a data bus and a control bus at the ARM end are connected with the infrasonic wave synthesis unit FPGA in a parallel transmission mode; the invention reserves a programmable interface, can be used for other subsequent expansion applications, can continuously monitor the working fluid level in real time, and can accurately control the frequency.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to a frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well.
Background
In the production process of an oil field, the working fluid level refers to the height from the liquid level of the oil jacket annulus of the pumping well to the bottom of the well, is a key index for reflecting the liquid supply capacity of a stratum and becomes an important basis for determining reasonable submergence and formulating a reasonable working system. At present, the method for measuring the working fluid level mainly comprises a pressure sensor test, an emptying cannonball test, a pneumatic sound source test and the like. The pressure sensor test and the emptying bomb mode are complex in operation and relatively poor in safety and reliability, the pneumatic sound source detection mode is wide in frequency band and serious in sound wave failure, and due to the fact that ultrasonic waves and infrasonic waves are included, field workers can obtain accurate data only through multiple measurements, and construction cost and operation intensity are increased. The infrasonic wave is a low-frequency sonic wave with the frequency less than 20Hz, has the characteristics of stable signal intensity and difficult attenuation, can be transmitted for a long distance, and can be used for measuring the working fluid level height of an oil well.
The current infrasonic wave generators are mainly of five types: (1) gas explosion type infrasonic wave generator: the generator has lower strength and is effective when being used in a close range, (2) the explosion type infrasonic generator: when in use, the quantity of cloud mist clusters and the detonation time interval need to be controlled well to obtain the infrasonic wave with required frequency, (3) a tubular infrasonic wave generator: the tube must be long enough to generate infrasonic waves of the desired frequency, which is inconvenient to carry and install, (4) speaker-type infrasonic wave generators: to generate infrasonic waves of a certain intensity, it is necessary to make the diaphragm area sufficiently large and the circumference thereof approximately equivalent to the wavelength of the infrasonic waves in addition to requiring a high amplitude,
(5) Frequency difference type infrasound generator: the cost is low and the frequency is adjustable.
Although the frequency difference type infrasonic wave generator has certain advantages, the frequency difference type infrasonic wave generator cannot be matched with the existing oil well equipment for use, and is not used for measuring the working fluid level of the oil well all the time, so only the gas explosion type infrasonic wave generator is used for measuring the working fluid level of the oil well at present, but a special external gas source is needed for gas supply, the infrasonic wave is generated by gas explosion after compression, the infrasonic wave generated by the mode is uncontrollable and discontinuous, and the measuring result is not accurate enough.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well, which does not need an external power supply and an external air source and has the characteristics of controllable, continuous and stable frequency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well comprises an ultrasonic wave transmitting device and an infrasonic wave synthesizing device, wherein the two devices are connected through a lower connector of a transducer; the ultrasonic transmitting device comprises an ultrasonic outer barrel, wherein an upper transducer connector is arranged at one end in the ultrasonic outer barrel and connected with one end of an ultrasonic transducer, a transmission line is embedded in the upper transducer connector, and the other end of the ultrasonic transducer penetrates through a lower transducer connector; the infrasonic wave synthesizer comprises an infrasonic wave outer cylinder, one end of the infrasonic wave outer cylinder is externally connected with a lower joint of the energy converter, an infrasonic wave synthesizer is arranged in the other end of the infrasonic wave outer cylinder, and the lower joint of the energy converter, the infrasonic wave outer cylinder and the infrasonic wave synthesizer form a cavity; the infrasonic wave synthesizer comprises a control unit ARM and an infrasonic wave synthesis unit FPGA, an address bus, a data bus and a control bus which are configured at one end of the control unit ARM are connected with the infrasonic wave synthesis unit FPGA in a parallel transmission mode, two output ends of the infrasonic wave synthesis unit FPGA are respectively connected with a digital-to-analog converter I and a digital-to-analog converter II, the digital-to-analog converter I and the digital-to-analog converter II are respectively connected with a low-pass filter A and a low-pass filter B, and the control unit ARM is further respectively connected with an input module, an output module and a communication port.
Further, the cavity is filled with nitrogen.
Compared with the prior art, the invention has the advantages that:
the traditional singlechip is changed into a control unit ARM, so that not only can all functions of the singlechip be realized, but also a programmable interface is reserved, and other subsequent extended applications can be carried out, such as automatically controlling the water injection amount and the like through the monitored working fluid level; because the frequency difference type infrasonic wave synthesizer can continuously transmit signals to generate infrasonic waves, the working fluid level of the oil well can be continuously monitored in real time; the invention can also control the infrasonic wave frequency according to the actual requirement, so that the measurement result is more accurate; the nitrogen filled in the infrasonic wave cavity can effectively avoid the side effect generated by ultrasonic cavitation and can control the frequency more accurately.
Drawings
FIG. 1 is a schematic diagram of a frequency-difference infrasonic synthesizer;
fig. 2 is an external circuit diagram of an infrasonic wave synthesizer;
in the figure: 1. the ultrasonic wave outer cylinder 2, the ultrasonic transducer 3, the transducer upper joint 4, the transducer lower joint 5, the infrasonic wave outer cylinder 6, the infrasonic wave synthesizer 7, the transmission line 8 and the cavity.
Detailed Description
The structure of the present invention will be discussed in detail below with reference to the accompanying drawings.
As shown in figure 1, a frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well consists of an ultrasonic wave transmitting device and an infrasonic wave synthesizing device which are connected through a lower joint 4 of a transducer; the ultrasonic transmitting device comprises an ultrasonic outer cylinder 1, wherein one end inside the ultrasonic outer cylinder 1 is provided with an upper transducer connector 3, the upper transducer connector 3 is connected with one end of an ultrasonic transducer 2, a transmission line 7 is embedded inside the upper transducer connector 3, the transmission line 7 is used for communication between an external control system of the synthesizer and the ultrasonic transducer 2, and the other end of the ultrasonic transducer 2 penetrates through a lower transducer connector 4; the infrasonic wave synthesizer comprises an infrasonic wave outer barrel 5, one end of the infrasonic wave outer barrel 5 is externally connected with a transducer lower connector 4, an infrasonic wave synthesizer 6 is arranged inside the other end of the infrasonic wave outer barrel 5, and a cavity 8 formed by the transducer lower connector 4, the infrasonic wave outer barrel 5 and the infrasonic wave synthesizer 6 is filled with nitrogen so as to weaken side effects generated by ultrasonic cavitation and control frequency more accurately;
as shown in fig. 2, the infrasonic wave synthesizer 6 includes a control unit ARM and an infrasonic wave synthesis unit FPGA, an address bus, a data bus and a control bus configured at one end of the control unit ARM are connected with the infrasonic wave synthesis unit FPGA in a parallel transmission manner, two output ends of the infrasonic wave synthesis unit FPGA are respectively connected with a digital-to-analog converter i and a digital-to-analog converter ii, the digital-to-analog converter i and the digital-to-analog converter ii are respectively connected with a low-pass filter a and a low-pass filter B, the control unit ARM is further respectively connected with an input module, an output module and a communication port, the control unit ARM mainly provides a data display function, the infrasonic wave synthesis unit FPGA is mainly used for realizing high-speed sampling of data, and the communication port is used for wireless remote transmission of signals.
The working principle of the invention is as follows: firstly, sending a signal to a control unit ARM through an upper computer, then controlling an ultrasonic transducer to send two rows of ultrasonic waves, requiring the two rows of ultrasonic waves to be high-frequency sine waves with the same phase and the frequency difference smaller than 20Hz, generating a row of infrasonic waves with the frequency smaller than 20Hz in an infrasonic wave synthesizer by the two rows of high-frequency sine waves f1 and f2, and obtaining the infrasonic waves with the required frequency through filtering treatment; when the measuring device is used for measuring the working fluid level of an oil well, infrasonic waves are transmitted underground, reflected waves with different frequencies are reflected when encountering an oil casing coupling and the working fluid level, and the reflected waves are received and processed by the AD chip to finally obtain the working fluid level height.
Claims (2)
1. A frequency difference type infrasonic wave generator for measuring the working fluid level of an oil well is characterized in that the generator consists of an ultrasonic wave transmitting device and an infrasonic wave synthesizing device, and the two devices are connected through a lower joint (4) of an energy converter; the ultrasonic transmitting device comprises an ultrasonic outer barrel (1), an upper transducer connector (3) is arranged at one end inside the ultrasonic outer barrel (1), the upper transducer connector (3) is connected with one end of an ultrasonic transducer (2), a transmission line (7) is embedded inside the upper transducer connector (3), and the other end of the ultrasonic transducer (2) penetrates through a lower transducer connector (4);
the infrasonic wave synthesizer comprises an infrasonic wave outer cylinder (5), one end of the infrasonic wave outer cylinder (5) is externally connected with a lower joint (4) of the transducer, an infrasonic wave synthesizer (6) is arranged inside the other end of the infrasonic wave outer cylinder, and the lower joint (4) of the transducer, the infrasonic wave outer cylinder (5) and the infrasonic wave synthesizer (6) form a cavity (8); the infrasonic wave synthesizer (6) comprises a control unit ARM and an infrasonic wave synthesis unit FPGA, an address bus, a data bus and a control bus which are configured at one end of the control unit ARM are connected with the infrasonic wave synthesis unit FPGA in a parallel transmission mode, two output ends of the infrasonic wave synthesis unit FPGA are respectively connected with a digital-to-analog converter I and a digital-to-analog converter II, the digital-to-analog converter I and the digital-to-analog converter II are respectively connected with a low-pass filter A and a low-pass filter B, and the control unit ARM is further respectively connected with an input module, an output module and a communication port.
2. The generator of infrasonic waves of the frequency-differential type for measuring the working fluid level of oil wells according to claim 1, characterized in that said cavity (8) is filled with nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710527362.XA CN107143324B (en) | 2017-06-30 | 2017-06-30 | Frequency difference type infrasonic wave generator for measuring working fluid level of oil well |
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| CN201710527362.XA CN107143324B (en) | 2017-06-30 | 2017-06-30 | Frequency difference type infrasonic wave generator for measuring working fluid level of oil well |
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| CN107143324A CN107143324A (en) | 2017-09-08 |
| CN107143324B true CN107143324B (en) | 2023-03-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108416282B (en) * | 2018-02-28 | 2021-06-04 | 西安石油大学 | Method for extracting acoustic velocity of echo signal of underground working fluid level based on tubing coupling |
| CN110219641A (en) * | 2019-05-27 | 2019-09-10 | 承德石油高等专科学校 | A kind of well liquid face test device and its test method |
| CN111442818B (en) * | 2020-04-16 | 2022-02-15 | 山西格盟中美清洁能源研发中心有限公司 | Plasma gasification furnace melt liquid level detection system and method based on infrasonic waves |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011002326A (en) * | 2009-06-18 | 2011-01-06 | Ricoh Elemex Corp | Ultrasonic liquid level meter |
| CN103015980A (en) * | 2012-12-11 | 2013-04-03 | 常州大学 | Working fluid level gauge for transmitting and receiving infrasonic waves and method thereof |
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- 2017-06-30 CN CN201710527362.XA patent/CN107143324B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011002326A (en) * | 2009-06-18 | 2011-01-06 | Ricoh Elemex Corp | Ultrasonic liquid level meter |
| CN103015980A (en) * | 2012-12-11 | 2013-04-03 | 常州大学 | Working fluid level gauge for transmitting and receiving infrasonic waves and method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 油井液面声波实时监测技术研究;苏娟;《电脑迷》(第08期);全文 * |
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