SU737902A1 - Device for well-logging during drilling - Google Patents

Description

(54) DEVICE FOR SQUARE SKVASHYG IN THE PROCESS OF BU &

The invention relates to the field of well logging while drilling. It can be applied both at deep research wells, as well as during blast hole drilling in open-pit mines with drill bits. A device is known for measuring the mechanical properties of a rock during drilling 1. A well-known device is designed for logging wells during drilling only by oscillations of a drill rod without taking into account the pressure on the bottom and penetration speed. It is also known a device for well wells 2, containing sensors, amplifiers, differential amplifier, two filters, periodic voltage generator, variable gain amplifier, phase shifter, delay line, comparing device, integrator and computer This device makes it possible to measure the mechanical properties of the rock by oscillations of the drill rod .., this device uses the parameter. - vibration of the drill rig, the rod and, as an auxiliary parameter, the speed of the drill rod as an information parameter. The presence of a single informational sign makes it difficult to objectively evaluate the properties of a disassembled. For example, as a result, an increase in pressure on the bit (boom buildup, during deep drilling, an increase in pressure in the hydraulic tool of a drilling rig during drilling, drilling | Drilling the same rock changes the level of vibration of the drill mtangi, which leads to snibkam in measurement. When drilling rocks with different coefficients of strength, the rate of penetration changes, which is also an information parameter not used in the considered device. The operation of the device is based on the processing of a continuous signal, which reduces its noise immunity and makes it difficult to configure the device. The object of the invention is to improve the accuracy of determining the properties of the rock. The goal is achieved by introducing channels for measuring pressure, penetration and installation rates, all input channels are connected to a channel for measuring oscillations of a drill rod, and the channel for measuring penetration speed is also connected to the channel for correcting signals rotational speed of the drill rod. At the same time, measuring the oscillations of a drill rod consists of a transmitter connected to a differential amplifier of a series-connected receiver, an amplifier signal of oscillations of a drill rod, a filter, a circuit for generating the average value of a signal for oscillations of a rod, threshold elements, a selection element for a maximal signal and coincidence circuits, V channel signal correction In accordance with the rotational speed of the drill rod, a circuit for generating the output level is introduced, its outputs are connected to the thresholds of the elements of the channel for measuring tangi oscillations and soon STI, Pressure intent channel: constituting the pressure sensors in series, pressure signal amplifier, rectifier / threshold elements, Vdeldele element or maximal signal, coincidence circuit, a-block, and the rock level of the pressure measurement channel that is connected to coincidence circuit of oscillation channel of the drill rod. The channel velocity measurement channel consists of a single, last, sensor; ckojpocTH The penetrations of the signal amplifier of the rate of penetration, rectifier, threshold elements, the output of the signal / signal, the signal of the input of the algorithm, the rock of the channel for measuring the rate of penetration t. the output of which is connected to the measurement channel coincidence circuits

pressure. The installation channel. The transfer rate is from the sequentially connected, the OR or cxejvfej delay cell and the forg control circuit of the control voltage; -; -. -. -. The device consists of two structurally insulated parts, Constructive execution of a part of the device, registering and signaling the oscillations of the drill rod;, is possible in the form of a solid n shape,

mounted on a rotating drill rod. Antenna is fastened along the perimeter of the platform of insulating material. Two piezoelectric sensors and a part of the device up to the transmitter are attached to the platform. The rest of the device is in any Convenient location. (Either on the drilling flock or in the control of the drilling equipment).

The drawing shows a diagram of the Device.

Two piezo sensors 1.2, two source repeaters 3 and 4, two amplifiers 5 and 6, a differential amplifier U, which is connected to transmitter 8, are used to register the vibration acceleration of the drill rod. A radio channel is used to remove information from the drill rod. The receiver 9 operates on the amplifier 10, which, in turn, is connected through a filter 11 to an average value extraction circuit 12, the correction signal of the rotational speed of the drill rod is performed on a matching element 13 connected to the threshold level output circuit 14. Threshold elements 15-17 the oscillation channel of the drilling rig is connected to the output of circuit 14, the element of maximal sigal 18 is connected to coincidence circuits 19-21, which, in turn, are connected to indicator 22, the rebreather channel consists of connected ovatelno OR circuit 23, the delay circuit 24 .and forming circuit control voltage 25. Kahn pressure measuring sensor consists of giving tim 26, amplifier 27, rectifier 28, connected to the threshold elements 29-31,

The selection element of the maximum signal 32 is connected to the coincidence circuits 33-55. The outputs of the coincidence circuits are connected to the input of the algorithm block 36 of the pressure measurement channel. The penetration rate channel consists of a short circuit connected by a speed sensor 37, amplifier 38, rectifier 39, threshold elements 40-42, a selection element of the maximum signal 43, and a block of the algorithm of the breed of the speed channel 44,

Number. The threshold elements 15, 16, 17, 29, 30, 31, 40, 41, 42 and the coincidence schemes 19, 20, 21, 33, 34, 35, as well as the relationships between them depend on the level of gradation in determining the mechanical properties of the drilled breed The higher the degree of gradation, the more accurate the determination of rock properties.

The principle of operation of the device is that each type of breed corresponds to a certain level of vibration of the drill rod at frequencies of rock pin breaking up to ota and constant - penetration rate at certain pressure on the bit, and speed of rotation of the drill rod,

The device determines the rock to be drilled according to three parameters: vibration acceleration level, penetration rate and pressure. Since the level of vibration acceleration and the rate of penetration vary with the number of revolutions, then. There is a level correction in the device circuit, which is used as a control voltage. signal of rotational speed of the drill rod. The device works as follows. The oscillation signals of the drill rod from piezoelectric sensors 1, 2 are fed to source repeaters 3, 4p providing high input resistance to register oscillations, starting from a low frequency. The piezo sensors are mounted on a platform mounted on a drill rod with a collar once their friend is relative to each other by 180. TfaKHM, the oscillating signal of the BHF rod will differ at the output of the differential force of the bodies 7 after amplifiers 5, 6 by 180 Differential amplifier subtracts the signals, as a result, the signatures being investigated The oscillations of the drill string will add up, and the interference signals induced on the input circuits of the device will be subtracted. Due to the equal conditions of the input circuits, the interference signals will be close in amplitude and will be mutually suppressed in the differential amplifier 7. The voltage corresponding to the oscillation of the drill rod is applied to the oscillating circuit of the transmitter 8, where the frequency modulation of the high-frequency signal of the transmitter by the voltage corresponding to the oscillation of the drill rod is performed. The receiver 9 receives the signal from the drill rod, the amplifier 10 amplifies it, and the filter 11 selects part of the signal in the frequency band corresponding to the work of the dowel pins along the face. The mean value extraction circuit 12 extracts its average value from the received signal after detection. The selection element of the maximum signal 18 transmits to its output a signal corresponding to the maximum voltage value obtained after the threshold elements 15-17. Thus, the signal corresponding to the average value of oscillations of the drill rod in a limited frequency band is supplied only to that of the coincidence circuits 19–21, which is designed for a specific voltage level corresponding to that obtained at a particular moment of the drill. At the output of the coincidence circuit, the signal will be only if a signal has arrived at its second input, which corresponds to a certain pressure and penetration rate. These signals are generated as follows. From the pressure sensor 26, an alternating voltage, the amplitude of which corresponds to the pressure level in the hydraulic cylinders supplying the drill rod or the weight of the drill rod through the amplifier 27, goes to the rectifier 28. The rectified voltage, the magnitude of which corresponds to the pressure level, goes to the threshold voltages. elements 29-31 and further on the element, extracting the maximum signal 3, working similarly to the described element 18. Coincidence circuits 33-35 produced a signal at output l (P1 in tBM cY Me ;; if there were any signals on two inputs of one of the circuits; coincidence. A signal corresponding to the bottomhole pressure is sent to the first input, a signal corresponding to the penetration rate to the second signal. Coincidence is possible only in one of the circuits. Next, the signal is fed to the input block of the rock algorithm 36, which is connected according to the level of the drill bits gi and pressure ns chisel, corresponding to | 0y1ik, the excavation of pserod with concrete (Fortress coefficients. From this block, a pressure signal is sent to that pressure: 19-21, which received a vibration signal, corresponding to a given pressure of a specific drilling strength) Oh the rocks. Similarly, the 33–35j coincidence circuit works only on them, you must control the pressures and the voltage from the sensor of the penetration 37 to the amplifier 38 and is an alternating voltage, the amplitude of cotsch og6 is proportional the speed of 1fx 18, the input block algorithm 44 is 44, the cat is scaled according to the pressure level of a hundred percent and Yarokhodka’s ampoules corresponding to j & a as drilling down the rock with specific coefficients of the fortress “From this block, signal of speed The penetration slots are fed to the MUs from the coincidence 33-35 schemes, to which the gigage signals a pressure signal for a bit corresponding to a given fortress penetration rate at the given output speed of a particular cxeNttJ coincidence 19-21 coincidence of signals from the level of oscillations of the drill rod, pressure and speed of penetration. This signal is applied to indicator 22, fixing it in the dimension of the fortress of the rock being drilled. The same indicator receives a signal from the amplifier 38, corresponding to the penetration rate, to determine the depth of the rock with a fixed strength. From the matching schemes corresponding to the signal transmission when drilling the ore body (19 and 20), voltage is applied to the OR circuit 23. The delay circuit 24 is triggered only when there is no signal from the circuit OR 23 and the presence of a signal from the switchboard and the days corresponding to the signal from drilling into the enclosing rock (21). Scheme 24 of delay produces a signal after the expiration of the time, corresponding to the re-breathing into the host rock. Near this, a control voltage forming circuit 25 is triggered and shuts off the engine of rotation of the drilling rig when using the device on the drilling rig when drilling the ore body,. - -. ,; Since the level of oscillations of the drill leg and the speed n) of the housewind-evis t of the number of revolutions, Fo in the device Gfeiusiben is corrected for failure, the signal about the rotational speed of the drilling rig, which is used as a control signal. the corrective circuit is sleepy. From the speed sensor, rotation; through the matching element 13, the alternating voltage, the frequency of which rijpo portional, the number of revolutions of the drill rod, takes the form of the nopolOBuro ypoSHH 14 output circuit. The circuit 14 produces a correcting voltage YY; FrGBYH, elements 15, 1b, 17, 40, 41 and 42, AmplIguda. Correcting its voltage is proportional to the number of revolutions of the drill rod. From the theories of pattern recognition, it follows that this kind of structure requires initial training, Nasfr. we are setting up. There are changes in the simulations of turns, and the outputs of the blog YOGBYE1: - RG6-- rock rhythms, 3.6 and 44 when drilling samples of rock formations with familiar mechanical properties; .; .- Ustrystvo passed industrial tests in the North Dzhezkazgan mine. The testing of the device was carried out on a SBSh-250MN machine for drilling over intermittent pores and pX (de. During the tests, it was found that the device is operational and provides recognition of the mechanical properties of the rock being drilled. Used as an informative parameter. Along with vibration acceleration, stroke gauge, pressure on the bit, and adjustments according to urs, to change the rotational speed of the bar, except for the mechanical properties of the rock being drilled. the boundaries of the ore body occurrence with the help of the device makes it possible to equalize the overburden in the area

737902

Claims (2)

8 bedding of the bottom of the body, which prevents ore dilution after. The device makes it possible to adjust the parameters of drilling and blasting operations in order to optimize them. Claim 1. A well logging tool during a drilling process, comprising a channel for measuring oscillations of a drill rod, consisting of two piezoelectric sensors, two amplifiers connected to piezoelectric sensor 1and through source followers, a differential amplifier connected to amplifiers, a filter and an indicator, a correction channel of the signal based on the rotational speed of a drill rod consisting of a matching element, which is due to the fact that, in order to improve the accuracy of determining the properties of rocks, it has introduced measurement channels ION ,, and install porebura penetration rate, with all input channels soedynersh channel measurements .Iy vibrations of the drill rod, and the velocity measuring channel connected to the channel of penetration pressure measurement and equalization channel speed of rotation of the drill rod. 2. The device according to claim 1, excluding it. We note that the channel for measuring oscillations of the drill rod consists of a transmitter connected to a differential amplifier and a series-connected receiver, an amplifier for an oscillation signal of a drill rod, a filter, and an average output circuit. the values of the oscillation signal, the threshold elements, the element selected, the maximum signal and the coincidence circuit. 3; A device as claimed in claim 1, wherein a threshold level generation scheme has been introduced into the signal correction channel for rotating speed of the drill rod, the outputs of which are connected to the threshold elements of the channel for measuring oscillations of the drill rod and penetration rate. 4, the device according to claim 1, characterized in that the pressure measurement channel is from the series-connected pressure sensor, pressure signal amplifier, / rectifier, threshold elements, maximum signal extraction element, coincidence circuit, input block of the measurement channel algorithm pressure, the output of which is connected to the schema of the coincidence channel measuring the oscillations of the drill rod. 5. The device according to claim 1, that is, that the meter measuret the penetration rate consists of a serially connected penetration rate sensor, signal amplifier penetration rate, rectifier, threshold elements, maximum signal extraction element, blocks for inputting the algorithm for the breed channel for measuring the rate of penetration, the output of which is connected to the pressure measurement channel coincidence circuit. 6, The device according to n.i, about tl and h and y w. This is due to the fact that the rebreak channel consists of series-connected OR cells, a delay circuit j and a control voltage formation circuit.  - - Information sources, . GGNRs in EXPANSION at Expedition 1. UK Application No. 128598: Cl, G 01 N 3/34, 1972. 2. Patent Lraitsii number 1587350,. cl. E 21B 47/00, 1970 (according to type).