Infrasound apiezon oil well automatic liquid level monitor
Technical field
The present invention relates to a kind of monitoring device that utilizes infrasound to monitor apiezon oil well level automatically, belong to petroleum production engineering oil recovery technique field, be mainly used in the oil well that the oil field does not have casing pressure.
Background technology
In the oil recovery process of oil field, test oil well build-up of fluid is an important process.Need in one day or several days, press the repeatedly duplicate measurements rod-pumped well annulus liquid level degree of depth of certain time interval.
Along with each elephant of China enters the middle and later periods of exploitation successively, the stratum fluid supply capacity progressively descends, and does not have the oil well (being the apiezon oil well) of associated gas more and more, can monitor the present domestic blank that also is in of appliance arrangement of this class apiezon oil well for a long time automatically.For the oil well that pressure is arranged, liquid level automated monitor structure is simple relatively, directly utilizes sleeve pipe gas just can carry out liquid level test, the product of existing moulding on this structure market, as the series of products of the Shenyang neolite XS of Science and Technology Ltd., patent is as ZL200520092928.3. etc.
For no kill-job, well head opens wide and communicates with outside atmosphere, and gas pressure is zero in the well, during the test level, need utilize external equipment to produce a pulse sound source.The method that adopts at present for the liquid level continuous monitoring of no kill-job for the tester utilizes common liquid level echometer keep watch by oil well, carry out the manual testing one time every the regular hour.By nitrogen gas generation impulsive sound in percussion gunpowder sound bullet or the abrupt release high-pressure nitrogen bottle, receive processing by Instrument sensor.After test is finished, the data communication in the instrument is arrived in the computer of test center.The shortcoming of current method of testing mainly shows as: 1. gunpowder sound bullet has potential safety hazard, is progressively eliminating at present; 2. gas cylinder belongs to the high-pressure bottle series products, and transportation, keeping, use all have strict demand, needs often inflation, and the indirect cost of use is very high, and the gas cylinder volume is bigger, heavy, and inconvenience is carried in operation.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of infrasound apiezon oil well automatic liquid level monitor, by extracting the gas in the oil well casing, inject air storage chamber after the pressurized treatments, produce the required infrasound pulse of test liquid level, substitute gunpowder sound bullet or nitrogen cylinder, can be for a long time in the aboveground automatic continous-stable work of apiezon oil.
For overcoming the above problems, concrete technical scheme of the present invention is as follows: a kind of infrasound apiezon oil well automatic liquid level monitor, the air chamber pressure sensor that in the housing of monitor, be provided with air storage chamber, links to each other, gas emitter, infrasound receiving and processing device and gas producing device with air storage chamber, monitor also is provided with gas generating unit, the air inlet port of gas generating unit links to each other with gas producing device by pipeline, and the gas outlet of gas generating unit links to each other with air storage chamber by pipeline.
The structure of described gas generating unit is: the hull outside at automonitor is provided with control cabinet, be provided with chargeable back-up cell, dc brushless motor, piston-cylinder, power source charges socket and control signal plug in the control cabinet, wherein chargeable back-up cell links to each other by lead with dc brushless motor with the power source charges socket respectively, dc brushless motor is connected with piston-cylinder, and dc brushless motor is connected by lead with the control signal plug; Gas outlet at the housing inner carrier cylinder of monitor links to each other by pipeline with air storage chamber.
Described gas producing device is to be provided with pressure-releasing electromagnetic valve in the housing of automonitor, and an end of pressure-releasing electromagnetic valve communicates with oil well by pipeline, and the other end links to each other by pipeline with the air inlet port of piston-cylinder.
The structure of described gas emitter is: be provided with an electrical turning magnet valve in the monitor housing, an end of electrical turning magnet valve communicates with air storage chamber by pipeline, and its other end communicates with oil well casing by pipeline.
Described infrasound receiving and processing device comprises microphone and the automaton that is fixed in housing.
This infrasound apiezon oil well automatic liquid level monitor adopts the structure of air storage chamber, air chamber pressure sensor, infrasound receiving and processing device, gas emitter, gas producing device and gas generating unit, this structure can be by extracting the gas in the oil well casing, inject air storage chamber after the pressurized treatments, the gases at high pressure of launching by the gas emitter produce the required infrasound pulse of test liquid level again, by the infrasound receiving and processing device sound wave is converted to numerical value intuitively again, thereby measures liquid level.
Description of drawings
Fig. 1 is the structural representation of infrasound apiezon oil well automatic liquid level monitor.
The specific embodiment
As shown in Figure 1, a kind of infrasound apiezon oil well automatic liquid level monitor, its structure is: the air chamber pressure sensor 9 that be provided with air storage chamber 10 in the housing of monitor, links to each other with air storage chamber, gas emitter, infrasound receiving and processing device and gas producing device, monitor also is provided with gas generating unit 21, the air inlet port of gas generating unit 21 links to each other with gas producing device by pipeline, and the gas outlet of gas generating unit 21 links to each other with air storage chamber 10 by pipeline.
The structure of described gas generating unit is: the hull outside at automonitor is provided with control cabinet 21, be provided with chargeable back-up cell 19, dc brushless motor 17, piston-cylinder 16, power source charges socket 20 and control signal plug 18 in the control cabinet 21, wherein chargeable back-up cell 19 links to each other by lead with power source charges socket 20 and dc brushless motor 17 respectively, dc brushless motor 17 is connected with piston-cylinder 16, and dc brushless motor 17 and control signal plug 18 are connected by lead; Link to each other by pipeline at the gas outlet of the housing inner carrier cylinder 16 of monitor and air storage chamber 10.
Described gas producing device is to be provided with pressure-releasing electromagnetic valve 7 in the housing of automonitor, and an end of pressure-releasing electromagnetic valve 7 communicates with oil well by pipeline, and the other end links to each other by pipeline with the air inlet port of piston-cylinder 16.
The structure of described gas emitter is: be provided with an electrical turning magnet valve 6 in the monitor housing, an end of electrical turning magnet valve 6 communicates with air storage chamber 10 by pipeline, and its other end communicates with oil well casing by pipeline.
Described infrasound receiving and processing device comprises microphone 2 and the automaton 4 that is fixed in housing, described microphone 2 is the patent No.: 200720013187.4 acoustic receiving transducer, described automaton 4 is a prior art, and the technical field personnel can independently finish under this connected mode and control were closed and is.
This automaton 4 connects microphone, pressure sensor, air chamber sensor, electrical turning magnet valve, pressure-releasing electromagnetic valve by lead, be used for above-mentioned parts are controlled, simultaneously automaton 4 links to each other with dc brushless motor 17 in the control cabinet 21 by control signal plug 18, with the control of 4 pairs of dc brushless motors 17 of assurance automaton.
For the ease of being connected of this infrasound apiezon oil well automatic liquid level monitor and well head, can be processed with the standard oil tube external thread at front end interface 1 place of housing, can be directly connected on the well recovery tree sleeve valve.
Its operating principle is: according to the control command that is provided with, at first open pressure-releasing electromagnetic valve 7 by automaton, starter motor extracts gas in the oil well casing by pipeline, is injected in the air storage chamber 10 by pipeline by the gas after piston-cylinder 16 compressions.Detect by air chamber pressure sensor 9, reach demand pressure after power cutoff quit work.Moment is opened electrical turning magnet valve 6, and the Compressed Gas in the air storage chamber is discharged in the oil well casing fast.Gas moment in well head place annular space is compressed, and produces compression time sound blaster.This infrasound pulse edge annular space is propagated to the down-hole, run into tubing coupling, phonetic symbol, the pulse of gas-liquid interface generation reflective sound wave, receive ping by microphone and convert the signal of telecommunication to, draw oil-well level after automaton is handled, test result can be transferred in the computer.
Beneficial effect of the present invention: infrasonic sound with no pressure oil well liquid level automatic monitoring device adopts the casing gas of oil well self as sound source, need not adopt heavy nitrogen cylinder and gunpowder sound bullet, and is safe, reliable and convenient. This device just is regularly charged or external 12 volts of power supplys, just can long term continuous automatic monitor hole condition, connects the various demands that radio function just can satisfy the digitlization oil field. Save use cost, thoroughly solved the potential safety hazard of expensive gunpowder sound bullet, avoided charging the inconvenient problem of nitrogen transportation and storage. Portable construction can be conveniently at the well head installing/dismounting of needs, and equipment is control fully automatically, does not need artificial participation, has saved a large amount of manpowers.
The present invention have volume little, be easy to carry, the characteristics such as handling safety, easy to use, easy care.