CN2117461U - Drilling fluid reheological properties monitor - Google Patents

Abstract

The utility model relates to an artificial intelligence drilling fluid rheological properties monitor which is controlled by adopting a computer. The monitor realizes automatic control to the measurement of drilling fluid rheological properties and has a function of one machine with multiple functions. The utility model is composed of following parts of computer used as a control core, a step motor, a rheometer, a stator, a coding disc and a digital pipe, wherein, the computer controls the step motor to drive a rotary cylinder of the rheometer to rotate; viscous force moment of measured liquid drives the stator to rotate, and the coding disc fixed on a rotary shaft of the stator rotate together; the system can read out the value of a rotating angle from the coded disc. The value of a rotating angle is input into the computer, and shearing stress of the measured liquid is detected through a decoding input device of the coding disc after the value of a rotating angle is processed and computed by the computer; then, the rotation number of the motor and the shearing stress value are displayed by the digital pipe, or the measured and computed results are output by a printer.

Description

Drilling fluid reheological properties monitor

The utility model relates to a kind of device of measuring the drilling fluid rheology performance.

It is made up of following eight parts: 1. mechanical device (comprises rotation system and measuring system) and coupled coding disk is decoded input unit circuit 2., stepper motor pulse amplifier drive circuit 3., connect the MCS-51 computer system and 4. finish rotation and measure control, and 5. control display board by keyboard and 6. 7. control 8. output data of printer with printer driver circuit.

At present domestic and international used measurement drilling fluid rheology device, the overwhelming majority is the Fann35SA type rotation viscometer that U.S. FannShi instrument company produces.On-the-spot at present being of using of China imitated beautiful FannShi rotation viscometer, and the subject matter that this instrument exists is:

1) rely on the scale of range estimation pointer on scale to read data, because the scale size is little, the scale low precision adds the randomness of range estimation person position to make the value of reading error bigger, particularly when measuring the low viscosity drilling fluid, influences bigger.

2) read data after, need carry out loaded down with trivial details artificial treatment and calculate.

3) rotating speed needs manual operations, and human factor is more, is unfavorable for accurate measurement.

4) mechanical transmission mechanism adopts the gear combination speed change, and complex structure is made with operation all inconvenient.

The purpose of this utility model is to overcome three problems that above beautiful Fann rotation viscometer exists, and improves the convenience of accuracy of instrument and use.

1) precision of raising shear stress reading;

2) solve by manually sample, data are handled and the error that causes.

3) realize instrument computer controlled measurement process of measurement, equilibration time, improve certainty of measurement and repeatability.

Purpose of the present invention can reach by following measure:

1) 9 coding disk and receiving system have realized the collection and the input of data, and with the instrument ull-scale value by 360 degree of bringing up to 512, improve 1.4 times of precision.

2) computer is controlled with data and is handled, and has realized one-machine-multi-function, shows and print data inventory programming as requested.

3) micro-stepping driving of stepping motor, the one-level gear drive, the computer controlled measurement equilibration time has made things convenient for operation, has improved certainty of measurement and repeatability.

Fig. 1 is an XY-I flow graph block diagram.4. the MCS-51 computer system is system's control core, 5. receive user input instruction by keyboard, according to the 3. control step motor rotation of command request control step motor pulses power amplifier drive circuit, guarantee that flow graph rotates to set shear rate, 2. measure the shear stress that liquid produces by coding disk decoding input unit circuit.6. show motor revolution and shear stress values by display board then, or 7. control printer according to customer requirements through the printing drive circuit and 8. export mensuration and result of calculation.

Fig. 2 is the measure portion structural representation.Stepper motor pulse amplifier drive circuit control step motor 6., 5. stepper motor drives the flow graph rotating cylinder through gear and 9. rotates to set shear rate.Driving stator by fluid to be measured viscous moment 8. 7. rotates, be fixed on the 3. rotation together of rotating shaft coding disk 4. thereby make, when spring torsional moment 1. equates with viscous moment, 2. system can read 9 rotation angle value that cyclic code is represented from photosensitive tube, by decoding input unit circuit input computer, machine is handled and is calculated as calculated, shows motor revolution and shear stress values by display board then, or according to customer requirements printout mensuration and result of calculation.

Fig. 3 is the setting of this instrumental function key, makes this instrument have the effect of multi-functional machine.

1) control function key: the paper feed key is the printer automatic carriage 1.; 2. time key is provided with minute; Reduction of speed key 3. mensuration mode is converted to reduction of speed mensuration; 4. check key proofreaies and correct code wheel reading; 5. printer output measurement result of printing key; Stop key 6. instrument stops work at present; 7. clear key removes the mistake setting parameter.

2) program control measurement function: 1. two fast functions are equivalent to two multi-speed rheometers; 2. six fast functions are equivalent to ix-speed electronic rheometer; 3. continuous function changes 10 at every turn and changes continuous measurement; The constant speed function is 4. to set revolution speed measuring; 5. the shear force function measures drilling fluid gel initial and 10-minute gel strength.

The utlity model has following advantage

1), this device read value stabilization, reliable, precision is high, considers that simultaneously by step motor control rotating cylinder revolution, shear rate is provided with accurately, than 1.5 times of the minimum raisings of used Fann formula accuracy of instrument.

2), by hand-guided, range estimation variant computer control and measure, improved the repeatability of apparatus measures.

3), enlarged Instrumentation Operating Areas, accomplish a tractor serves several purposes, Fig. 3 is this instrumental function key schematic diagram, this machine have simultaneously two speed, six speed, continuously flow graph measurement function and carry out automatically just, the measurement of egress.

Claims (2)

1, a kind of by FannShi viscometer, nine drilling fluid rheology measurement mechanisms that photoelectric coded disk, pulsed drive motor and MCS-51 single-chip microcomputer are formed, 6. 5. 9. the rotating cylinder that it is characterized in that the FannShi viscometer link to each other with stepper motor by gear, and 3. 4. 7. the stator of FannShi viscometer link to each other in code-disc by rotating shaft.

2, drilling well rheological measurement device according to claim 1 is characterized in that 3. a MCS-51 single-chip microcomputer interface 4. links to each other with stepper motor pulse amplifier drive circuit, and 2. another interface links to each other with coding disk decoding input unit circuit.

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