CN2071704U - Portable oil well double-suffocated curve diagnostic instrument - Google Patents

Abstract

The utility model discloses a double-suffocated curve diagnostic instrument used for measuring liquid pressure and gas pressure of oil wells, comprising the pressure sensor of a primary instrument and a secondary instrument comprising a circuit board, a pocket computer, a printer and a panel which are arranged in an outer shell. The instrument can collect and process data in real time, monitor pressure changes, conveniently adjust sampling time, automatically record and store the data, and print pressure-time relationship curves. The utility model can meet requirements for pressure measurement in oil wells of large pressure fluctuation. The curves measured with the instrument can accurately analyze the working condition of an oil well pump. The utility model has the advantages of convenient usage and operation, reasonable element adoption and low cost.

Description

Portable oil well double-suffocated curve diagnostic instrument

The utility model belongs to mining site oil recovery well testing tester, especially for the pressure test of in the mechanical oil well oil well being carried out liquid, gas.

It is on-the-spot to recover the oil in the oil field, in order to analyze the working condition of pumpingh well, often adopts and measures the method that oil well pressure changes after well head produced closing gate, the working condition of utilizing the curve that builds the pressure that records to come fuel-displaced situation of analysis and judgement oil well and deep well pump.Generally adopt at present the mode of hand-kept at the scene, promptly, make curve analysis more by hand with stopwatch and ordinarily manometer timing direct-reading record pressure data.This method was both also inaccurate slowly, can not satisfy the production needs.For addressing this problem, a kind of well head pressure-keeping device is also arranged in recent years, it uses mechanical type direct-reading pressure meter indicated pressure, adopts Hall element to carry out the piezoelectricity conversion.But its shortcoming is: dynamic error is big, and sensitivity is low, and the sampling time is short, can not satisfy the use of on-the-spot multiple hole condition, especially is not suitable for the test of the big oil well of pressure oscillation, can not directly monitor the oil well pressure situation of change, makes troubles to operation.

The purpose of this utility model is in order to improve the functional performance of existing well head pressure-keeping device, to improve the accuracy of test, enlarge the scope of application, and the two curve diagnostic equipments of suppressing of a kind of novel portable oil well that design for handled easily.

The technical solution of the utility model is achieved in that whole instrument is the secondary meter that is made of primary instrument pressure sensor 1 and circuit board, pocket computer 5, printer 6 and panels 12 in being installed in shell 11 and pair suppresses the curve diagnostic equipments by the link to each other oil well that is combined into of the socket on the panel 12 14, its preamplifier 2, number pressure table 3, computer interface 4, power supply 7, undervoltage warning circuit 8, charging circuit 9 etc. all are installed on the circuit board, it is characterized in that:

The strain chip compact high precision pressure sensor that pressure-sensitive partly adopts full-bridge circuit to constitute.Preamplifier 2 is by two-stage calculation amplifier IC ₆, IC ₇Constitute, from the output of the pressure sensor operational amplifier that goes between, middle through C ₈-C ₁₀, R ₁₃-R ₁₅Two J filter circuits of forming.Number presses table 3 by modulus conversion chip IC ₉, decoder IC ₁₀, driver IC ₁₁, formation such as digital display LED, the input of modulus conversion chip links to each other with the output of operational amplifier, the output DS of modulus conversion chip ₁-DS ₄, Q ₀-Q ₃Press decoder, driver and the computer interface of table to link to each other with number simultaneously.Decoder, output end of driver link to each other with digital display LED.Computer interface 4 is by a decoder IC ₁₂With two bidirectional buffer IC ₁₃, IC ₁₄Constitute, the two ends of two snubbers link to each other with the output of modulus conversion chip with computer socket (60 pin bus) respectively, and an end of decoder links to each other with computer socket (60 pin bus), and the other end links to each other with two buffering drivers respectively.Power supply 7 by after the battery series connection successively with stabilizator IC ₁, isolated converter IC ₂, three grades of stabilizator IC ₃, IC ₄Link to each other, provide system power supply by the output of three grades of stabilizators.The output of transformer TS and D _1-4, R ₁, LED ₁Link to each other and constitute pulsed low current charge circuit 9.This instrument also has by R ₂-R ₆, WG, BG, LED ₂, LED ₃, C ₇, HTD, IC ₅The supply voltage that constitutes light indication and the sound light alarming circuit 8 of supply voltage when being lower than normal value just often, warning circuit 8 and charging circuit 9 are in parallel with power-supply battery respectively.

The modulus conversion chip of 14433 biproduct somatotypes of this instrument selection three and half.

During work, be input to preamplifier 2 by pressure sensor 1 detected signal and carry out the signal amplification, deliver to several pressure tables 3 through amplified analog signal, data signal after modulus conversion chip is handled in number pressure table is sent display window 13 and is entered computer 5 by computer interface 4 simultaneously, send printer 6 printouts after treatment.Power supply 7 links to each other with above each several part respectively provides power supply.Power supply indication warning circuit 8 is in parallel with power-supply battery, carries out normal indication of supply voltage and undervoltage warning.Charging circuit 9 is in parallel with power-supply battery to charge.

The utility model has the advantages that: (1). have real-time image data and processing capacity, can show pressure with numeral in real time, be convenient to observe monitoring; Simultaneously under computer program control, can store measured data, data are printable after treatment to go out the time dependent smooth curve of pressure, has improved functional performance, has overcome the disadvantage that the big oil well of pressure oscillation can not be surveyed and drawn the curve that builds the pressure.(2) image data is flexible in real time, can arbitrarily adjust sampling time interval, has satisfied the requirement of oil field on-the-spot test.(3) owing to select for use element reasonable, property/price ratio height has improved the accuracy of test data, has reduced cost simultaneously.(4) used number of batteries is few, has alleviated instruments weight, and system also has power source voltage indication and warning and charge function, has made things convenient for use.

Fig. 1 is the logic block-diagram of this instrument.

Fig. 2 is the circuit theory diagrams of this instrument.

Fig. 3 is the profile schematic diagram of this instrument.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.Pressure sensor 1 is by R ₇-R ₁₀The strain-gauge transducers that four arm resistances constitute can be selected the little CT-21 series pressure sensor of highly sensitive error for use, are connected with four-core socket 14 on the panel 12 by signal cable.During use sensor 1 is received pressure measurement place, under pressure, the resistance of arm resistance changes, and produces with pressure at output contact A, B two-end-point place to change proportional potential change, has realized that promptly pressure becomes the transformation of the signal of telecommunication.

This signal of telecommunication enters preamplifier 2, at operational amplifier IC ₆Input circuit in, by C ₈-C ₁₀, R ₁₃-R ₁₅Two J filter circuit elimination signal noises of forming, potentiometer W ₁, W ₂Play zeroing and mark amount respectively, feedback resistance R ₁₈Play the stabilizing circuit effect.The signal of telecommunication is through IC ₆Amplify the back from IC ₆6 come out to enter IC ₇5 points, IC ₇With R ₂₆Be connected into trailing type output, play the effect of impedance conversion.Enter several pressure tables 3 again through amplified analog signal.IC ₆Can select OP-07EP for use, IC ₇Can select MC1458 for use.

The signal of telecommunication enters the modulus conversion chip IC in several pressure tables 3 ₉, through IC ₉After the processing, become the binary-coded decimal of circulation output, Q ₀-Q ₃The a certain moment is only exported a binary-coded decimal, and its figure place depends on clock signal DS ₁-DS ₄The corresponding variation.IC ₉Power supply be by IC ₃, IC ₄IC is provided ₈, R ₂₇Normal potential V is provided _REF, by changing V _REF(R ₂₇) and R ₂₈Value, just can change this input electrical signal range.Decoder IC ₁₀With Q ₀-Q ₃The standard binary-coded decimal of sending here is translated as represents 0,1,2 respectively ... ten kinds of data signal signs of 9, driver IC ₁₁Cooperate decoder output, drive charactron LED and show pressure value; This signal is delivered to computer interface respectively simultaneously.IC ₈Can select MC1403 for use, IC ₉Can select MC14433 or G14433 for use, IC ₁₀Can select 14513 for use, IC ₁₁Can select 1413 etc. for use.

The IC of computer interface 4 ₁₃, IC ₁₄Be two bidirectional buffering drivers, i.e. latch, the signal of being sent here by modulus conversion chip enters computer through this, and binary-coded decimal and clock signal are connected respectively to the data input pin of two latch.The sampling control realize by software instruction, by computer to decoder IC ₁₂After sending corresponding sampled signal, trigger corresponding latch, promptly under software control, finish sampling modulus conversion chip by computer interface 4 through the decoder effect.IC ₁₂Can select 74HC138,74F138,40H138 etc. for use, IC ₁₃, IC ₁₄Can select 74HC245,74HCT245,74CS245 etc. for use.

Sampled result shows pressure value by display window 13, enters Computer Processing simultaneously, at any time force of impression-time curve.

Power supply 7 offers each chip of system and probe power.Press K switch, IC ₁Connect power supply, carry out elementary voltage stabilizing, enter isolated converter IC then ₂Carry out second level voltage stabilizing and power conversion and handle, the unipolarity power supply is treated to bipolar power supply, and finish the mutual isolation of input and output, the positive-negative power after the processing is again through IC ₃, IC ₄After further voltage stabilizing is handled, send the positive-negative polarity power supply after the voltage stabilizing three times.IC ₁, IC ₃, IC ₄Can select UA7800 series or LM317 etc. for use, IC ₂Can select the 5D12/250 of usefulness BCT-IPS series DC/DC etc. for use.

For safe and convenient to use, also designed the normal indication of supply voltage with supply voltage the circuit 8 of sound and light alarm when under-voltage.Under normal power voltage, triode BG conducting, electric current passes through R ₄, LED ₂, BG forms loop, LED ₂Send green glow.When supply voltage was lower than normal range value, BG ended, LED ₂Green glow extinguishes, and triggers IC simultaneously ₅The oscillating circuit action that NAND gate is formed is at R ₅, IC ₅, C ₇, HTD, LED ₃, R ₆Produce vibration in the circuit, make HTD send song, LED ₃Also sending simultaneously flicker ruddiness reminds people notes.

This instrument has also designed charging circuit 9, after N, L insert the 220V civil power, becomes the 15V alternating current through transformer TS, again through commutation diode D at 2 _1-4, current-limiting resistance R ₁Become folk prescription to the little electric current of pulse, can realize battery is carried out quick charge.

Claims (3)

1, a kind of two curve diagnostic equipments of suppressing of oil well of measuring liquid, gas pressure, comprise primary instrument pressure sensor 1 and be installed in the secondary meter that circuit board, pocket computer 5, printer 6, panel 12 in the shell 11 constitute, and be connected to form by the socket on the panel 12 14, its preamplifier 2, number pressure table 3, computer interface 4, power supply 7, undervoltage warning circuit 8, charging circuit 9 etc. all are installed on the circuit board, it is characterized in that:

(1). pressure sensor 1 is the strain chip compact high precision pressure sensor that is made of full-bridge circuit;

(2). preamplifier 2 is by two-stage calculation amplifier IC in the circuit ₆, IC ₇Constitute, from the output lead-in wire of pressure sensor 1, signal is through C ₈-C ₁₀, R ₁₃-R ₁₅Two J filter circuits of forming enter operational amplifier successively;

(3). be provided with several pressure tables 3 of monitoring pressure variation in real time in the circuit, and show three and half pressure values by the pressure display window on the panel 12 13, number is pressed and is shown by modulus conversion chip IC ₉, decoder IC ₁₀, driver IC ₁₁, formation such as digital display LED, the output DS of modulus conversion chip ₁-DS ₄, Q ₀-Q ₃Press decoder, driver and the computer interface 4 of table to link to each other with number simultaneously, decoder, output end of driver link to each other with digital display respectively;

(4). computer interface 4 is by decoder IC in the circuit ₁₂With two bidirectional buffering driver ICs ₁₃, IC ₁₄Constitute, the two ends of two snubbers link to each other with the output of modulus conversion chip with computer socket (60 Pin bus) respectively, and an end of decoder links to each other with computer socket (60 pin bus), and the other end links to each other with two buffering drivers respectively.

2, oil well according to claim 1 is two suppresses the curve diagnostic equipment, it is characterized in that: have by R in the circuit ₂-R ₆, WG, BG, LED ₂, LED ₃, C ₇, HTD, IC ₅The normal power voltage indicating circuit and the under-voltage sound light alarming circuit 8 of supply voltage that constitute.

3, oil well according to claim 1 and 2 is two suppresses the curve diagnostic equipment, it is characterized in that: the modulus conversion chip of the biproduct somatotype of described modulus conversion chip employing three and half.

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