SU1641986A1 - Drilling operation control system - Google Patents

Abstract

The invention relates to the drilling of wells and allows to increase the drilling efficiency due to drilling of the well in an optimal manner. The system contains a drilling process control unit 1, feed controllers 3 bits and rotational speed 4, a penetration sensor 5, averaging block, a DAC 12 and 13, a memory block 10, ADC 8 and 9, a key block 2, a flow interval counter 7, a switch 14 modes of operation and block 11 correction. In the process of drilling an advanced well, the optimal parameters (P) of the mode, generated by block 1, averaged in block 6, are recorded in memory block 10. The penetration sensor 5 sets the averaging intervals, the number of which is counted by the counter 7 penetration intervals. In the process of drilling, the stage of drilling is fixed, equal to three intervals of penetration. At this stage, the optimal P drilling modes from block 1 and the drilling mode from block 10 for the corresponding penetration intervals are received in block 1 of the I correction. In the furnace, the conversion ratio of the drilling mode to the drilling mode is determined. At the end of the third interval of penetration P recorded in block 10, corrected in block 11 and through block 2, the keys arrive at the controllers 3 and 4. The drilling is performed at optimum P. 7, ill.

Description

The invention relates to drilling, in particular to controlling the penetration of rising workings with the preliminary holding of an advance well.

The aim of the invention is to increase the drilling efficiency due to the drilling that rises up optimally.

FIG. 1 shows a block diagram of the device; in fig. 2 - functional block diagram of averaging; in fig. 3 - fuction operation block correction circuit; in fig. 4 - circuit switch mode; in fig. 5 - functional diagram of the counter interval penetration; in fig. 6 - time diagrams of the work interval counter during drilling and drilling: a - in one direction; b - in the opposite direction; in fig. 7 shows a drilling control unit.

The drilling process control system includes a drilling process control unit 1, a key block 2, regulators; rotational speed 3 and feed 4, penetration sensor 5, averaging unit 6, counter 7 intervals

gfokodsh, ana / shgovo-digital converters 8 and 9, memory block 10, correction block 11, digital-to-analog converters 12 and 13, operating mode switch 14.

The drilling process control unit 1 is connected to the averaging block 6 and the key block 2, the first and second information outputs of the drilling process control block 1 are connected respectively to the first and second information inputs of the key block 2 and the averaging block 6. The output of the penetration sensor 5 is connected to the first input of the counter 7 penetration intervals and the third (control) input of the averaging unit 6. The first and second information outputs of the averaging unit 6 are sequentially connected via the analog-digital converter 8 and the analog-digital converter 9, respectively, with the first and second information inputs of the memory unit 10 and the first and second information inputs of the correction unit 11, respectively. The first control output of the operation mode switch 14 is connected to the third (control) input of the memory unit 10 and the third (control) input of the penetration interval counter 7, the second (control) input of which is connected to the second control output of the operation mode switch 14 . The first output of the metering slot 7 is connected to the fourth (address) input of the memory unit 10, the first and second information outputs of which are connected respectively to the third and fourth information inputs of the correction unit 11. The second (control) output of the counter 7 penetration intervals is associated with the fifth (control) input of the key block 2 and the fifth (control) input of the correction block 11. The first and second information outputs of the correction unit 11, respectively, via a digital-to-analog converter 13 and a digital-analog converter 12 are connected to TpjTbHM and the fourth information inputs of the block 2 keys, respectively. The first information output of the key block 2 is connected to the first input of the drilling process control block 1 via the bit feed controller 4, and the second information output to the second input of the drilling process control block 1 via the rotation frequency regulator 3.

The drilling process control unit 1 searches for the optimal drilling mode and acts on the bit feed and rotational rate controllers.

Memory unit 10 memorizes and reads information at

7 intervals formed by the counter.

The device works as follows.

8 drilling mode signals

The feed force and frequency of arrest parameters from the drilling process control unit 1 through the key block 2 are fed to the feed and 4 speed controllers 3.

0 At the same time, the signals of the feed force and the rotation frequency are fed to averaging unit 6, where they are averaged over the interval between two pulses of the penetration sensor 5. From the averaging unit 6, the averaged values of the signals are recorded in the memory unit 10 by the addresses of the numbers of the current penetration intervals. The write address is generated by a counter 7 penetration intervals.

0 In the drilling mode of the operation mode switches 14, the memory unit 10 is switched to the playback mode and the Counter 7 penetration intervals into the drilling mode.

5 The drilling process can be divided into two stages: drilling and self-drilling. The duration of drilling is three intervals of penetration. Drilling interval - introduction of drilling tools into the rock

0 for the length of one rod of the drill rod. The drilling ends when the drill is inserted into the rock into three rods of the drill rod, since the dimensions of the drill’s do not allow to carry out this operation for

5 one interval of penetration, only in the third interval of penetration all the bore cutters enter the drilling process.

In the process of drilling from block 1, the control of the drilling process signals of the parameters are transmitted through the key block 2 to the feed 4 and rotation frequency controllers 3. These same signals averaged over the interval of passage in block 6 averaging through the A / D converters 8 and 9 go to the first and

5 second inputs of the block 11 correction. The correction block 11 for these penetration intervals from the memory block 10 on the third and fourth inputs receives the values of the operating parameters of the bit force and rotation frequency

0 recorded for drilling mode. In correction block 11, the ratio of the signals from averaging block 6 and memory block 10 is determined and stored. The result of the division is the reduction coefficient

5 drilling mode parameters to drilling parameters.

At the end of the third penetration interval, the drilling is completed and the drilling of the advanced well begins. At the same time, a high logic level with

the second output of the counter 7 spacing intervals switches the inputs of the 2 key block from the drilling process control unit 1 to the correction unit 11, and outputs the correction unit 11 from the mode of calculating the reduction factor.

Subsequently, for the current penetration intervals calculated by the counter 7 penetration intervals, from the memory unit 10, the values of the operational parameters corresponding to these numbers are sent to the correction unit 11, where the feed signals and rotation frequencies are multiplied by the conversion factor calculated earlier by the correction unit 11, known for the drilling mode at the current drilling interval, but reduced to the drilling mode at the same interval through the block 2 of the keys are fed to the feed control 4 and the rotation frequency 3.

Thus, when conducting an advanced well at the current interval of penetration, averaged and memorize the values of operational parameters by the number of this interval, when drilling the advanced well by the current interval number, they recall the previously recorded parameters, update them for the drilling mode and feed the feed regulators and rotational speeds, which makes it possible to exclude, during drilling, an unproductive operation to find the optimal mode.

The averaging unit 6 (FIG. 2) is made in the form of serially connected first integrator 15, first divider 16, first sampling-storage device (UHF) 17 and parallel to it serially connected second integrator 18, second divider 19, and second UHF 20. The block contains also the counter 21, the digital-to-analog converter 22 and the timer 23. The output of the D / A converter 22 is connected to the second inputs of the dividers 16 and 19, the output of the timer 23 is also connected to the second inputs of the VHR 17 and VHR 20.

The signal from the penetration sensor 5 starts the timer 23 and simultaneously enters the second inputs of the integrators 15 and 18 and the first input of the counter 21, sets them to the zero state. The first inputs of the integrators 15 and 18 receive the values of the operating parameters of the axial force and rotation frequency from the drilling process control unit 1. From the outputs of the integrators 15 and 18, signals proportional to the integral of the axial force and rotational frequency are fed to the first inputs of dividers 16 and 19, to the second inputs of which a signal is received that is proportional to the number of pulses of timer 23, continuously counted by the counter. 21 and the converted D / A converter 22 to analog, at this point in time. So, from the outputs

dividers 16, 19, the signals of axial force and rotation frequency proportional to the average value are fed to the first inputs of the water chemistry equipment 17 and 20, where they are sampled and stored. A signal to the sample

0 are the signals of timer 23 arriving at the second inputs. The new penetration sensor signal 5 restarts the timer and the cycle of operation repeats.

Block 11 correction (Fig. 3) is made in

5 in the form of a serially connected first divider 24, a first parallel register 25, a first multiplier 26 and a serially connected second divider 27 parallel to it, a second parallel register

0 28 and the second multiplier 29.

From block 6 averaging through the second ADC 9, the signal of the axial force is fed to the first input of the first divider 24, the second input of which receives the signal from block 10

5 of the memory operating in the playback mode, the result of the division is fed to the first input of the first parallel register, at the output of which is the signal of the cat, therefore there is no signal at the output of the first multiplier 26. At the end of the drill. those. the third penetration interval, the signal from the second output of the penetration interval counter 7 is fed to the second input of the first parallel register 25. By this signal, the result of the division from the input of the parallel register 25 is transmitted to the output and remains unchanged for all subsequent work. From the output of the parallel register 25, the signal arrives at the first

0 input of the first multiplier 26. The second input of which receives signals from memory block 10. The product of these signals at the output of the first multiplier 26 is a signal from the output of the block

5 10 memory, but scaled down signal with averaging unit 6. The operations on the rotational frequency signal in which the second divider 27 is involved, the second parallel register 28 and the second multiplier 29 are performed in a similar way.

The switch 14 of the operating mode (Fig. 4) is made in the form of the following elements: a three-position switch Si, k

5 to the first output of which the element HE 30 is connected in series, the second input of the element NO 31, the element NOT 32, the elements NE 33 are connected in series to the third output, the second input of the element IS-NOT 34, the element NOT 35.

The switch 14 operates as follows.

When installed, the switches Si in the 1st lolo-tion of the input element NO 30 low logic level. The output of the element HE 30 is connected to the second input of the element AND-HE 31, on which a high level is set, since at the first pass of the element AND-HE 31 there is a constant high logic level, then the output is set to a low level. The HE element 32 sets a high logic level from the first output of the switch 14. The input element HE 33 is a high logical level of the power source. The output of the element HE 33 connects to the second input of the element AND-NO 34, a low logical level is set at r,; the source, since the first input of the element AND-NOT 34 is constantly high, then the output is also set to high logic level. The HE element 35 sets the low level of the second “switch 14”.

When installing the switch Si in the second and third position, the elements 30 - 35 work in a similar way.

Work switch given in Chabt 1.

Counter 7 interpasses come through. (Fig. 5) consists of a differentiating element 36, a trigger 37, a decoder 38, a reversible counter 39. two elements 2 OR 40 NO. 41, of the element OR 42 of the shear pein-rz 43.

The decoder 38 connects to the first input a summing input of the reversing account mca 39 with logic levels at the second and third inputs O and 1 (1 and O), respectively, and a subtracting input of the reversing counter 39 with O logic level of the signal at the second and third inputs.

When the switching element 36 is changed, when the input signal level changes from a low to a second input from low to high, it generates a single impulse that sets the reversing counter 39 to the zero state and changes the state of the rigger 37.

The shift register 43 is intended to be the length of the delay in drilling into three 1-fits of the occurrence of logical 1-second output. The modes of operation of the counter 7 intervals of penetration are given in table. 2 All modes are set by the operation mode switch 14.

The work of the counter 7 intervals of penetration in various modes of operation is illustrated by time diagrams (Fig 6}

In the drilling mode, the impulses of the penetration sensor 5 (Uixi, Fig. 6a) are fed to the summing input of the reversing counter

39 (Uflbixi). From the output of the reversible counter 39, the number (address) of the current penetration interval goes to the fourth (address) input of the memory block 10.

In the drilling mode (in the drilling direction), the high logic potential from the second input of the penetration interval counter 7 reversible counter 39 is set to the zero state, the state of the trigger 37 changes. Pulses

from the sensor 5 penetrations arrive at the summing input of the reversible counter 39

(Uibixi. Fig. 6a). The counter of penetration starts from zero, since drilling is conducted in the same direction as drilling. From the output of the reversible counter 39, the address of the current penetration interval goes to the address input of the memory unit 10. At the same time the pulses from the sensor 5 penetration through the elements 41, 42 enters the shift o. ,, ,, 47

You register 43 (willow), where there is a delay in the appearance at the second output of logical 1 three spacing intervals

(andZYh)

In the drilling mode (in the opposite direction to drilling), the pulses from the penetration sensor 5 are fed to the subtraction

Th

The input of the reverse counter 39 (Uvizh, Fig. 6, b). Since drilling is conducted in the direction opposite to the direction of drilling, the drilling intervals start from the last drilling interval in the drilling mode. From the output of the reversible counter 39, the address of the current penetration interval is fed to the address input of the memory block 10. Simultaneously, the pulses from the sensor 5 penetration through the elements 40, 42 are received in the shift register 43

(out Fig 6, b), where the delay occurs at the second output of logical 1

three intervals of penetration (Uyh, Fig, 6, b).

FIG. Figure 7 shows the functional diagram of the drilling control unit 1. This scheme is an example of the implementation of this unit and is a system of extreme regulation of roller drilling. Such and similar devices are equipped with drilling machines and combines Block 1 of the drilling process control, as a rule, includes a hydraulic system 44. control panel 45 of the manual feed control, hydraulic throttle 46 , feed actuator 47, automatic rotational speed control unit 48, actuator 49 (direct current motor), as well as extreme control unit 50 and assembly 51 are formed extremum of the selected criterion.

The use of the device ensures the exclusion of operations to search for optimal modes when drilling is rising, which leads to an acceleration of the well construction process,

Claims (1)

A drilling process control system comprising a drilling process control unit, a bit feed controller, a penetration sensor, an averaging unit, a digital-analog and analog-to-digital converters, and a memory block, in order to increase the drilling efficiency by drilling the riser in the optimal mode, the system is equipped with a key block, a rotation frequency regulator, a penetration interval counter, an operating mode switch, a correction block, and second digital-analog and analog-to-digital signals. smooth transducers, with the first and second outputs of the drilling control unit connected to the corresponding inputs of the block averaging and key block, the first and second outputs of which are connected to the first and second inputs of the drilling process control unit through the supply and speed controllers respectively, the output of the penetration sensor is connected to the first input of the penetration interval counter and the third input of the averaging block, first and second the outputs of which are connected to the first and second inputs of the memory and correction blocks through the corresponding analog-digital converter, the first output of the operating mode switch is connected to the third input of the block The first and second outputs of which are connected respectively to the third and fourth input of the correction unit, the second output of the operation mode switch is connected to the corresponding input of the penetration interval counter, the first output of which is connected to the fourth input of the memory unit, the first and second outputs of the correction unit analog converter connected to the third and fourth inputs of the key block, and the first output of the mode selector switch is also connected to the third input of the penetration counter, the second output of which is connected to the fifth inputs of the block keys and block correction.  1 and O - indicate the logical level of the signal. Table 1 table 2 To $ mcu (J g / G block 8 7 FIG. AND H./No. tt.JTs l X1 4NJ lg i r W “W 7., J8 U "," VM 49 Drilling drilling vte Thebes. J and Scribbling L J f J 3 t five