JPS5886295A - Pump noise filter for measuring device among bored well in oil well - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transmission device for a valve gap measurement device in an oil well.In particular, the present invention relates to a data transmission device for a valve gap measurement device. The present invention relates to a device for transmitting data to the surface using pressure pulsations of external liquid.The object of the present invention is to provide a filter device that removes data interference pulsations caused by external liquid circulation pumps from data sent from well bottom equipment to the surface due to pressure pulsations of external liquid. Regarding.

In the oil drilling industry, there is a need to transmit real-time data from a well-valve measurement device to the bottom of the well. The ambient (lO) parameter conditions near the drill bit contain extremely valuable information and assist in drilling. In particular, this information is of great help in making the best use of the equipment and human resources needed in the well. There are four basic techniques for transmitting two types of data from the well bottom to the surface: Transmission of data by electromagnetic methods, insulated conductor or hard wire systems, sonic methods, and pressure pulse modulation of external fluid.Although these methods have advantages and disadvantages, this specification will not focus on the external hydraulic pressure coupling method. state

In a valve gap measurement device that utilizes external liquid pressure pulsations, it is disturbed by other pressure pulsations within the external liquid flow path. The main cause of this disturbance pressure pulsation is the external fluid circulation pump. This circulation pump has a plurality of mechanical parts such as pistons and valves, which send the external liquid into the drill string and generate pressure pulsations, and generate noise or interference with the pressure pulsations generated by the transmitter of the valve distance measuring device. represent. Since the spigot-valve measuring device uses the liquid outside the spigot as a data transmission path, pressure interference and noise are undesirable.

Pressure curve generated by the external liquid circulation pump (1)
1) The value of is is so large that it completely covers the data from the gap measuring device and must be removed by the data receiving device on the surface. Regarding this noise, the interference caused by each ζ (external liquid circulation pump) is not equal and varies depending on the pump type and pump manufacturer, and even between pumps of the same type in a particular well drilling system. Characteristic pressure pulsations change with pump operating speed. Therefore, noise filters to remove or pass through this pulse pressure interference are suitable for changing conditions between each facility and device, and can be used under actual usage conditions. The purpose of the present invention is to solve the above-mentioned problems and provide a filter device that eliminates noise from flowing liquid outside the field. It shall be a device.

In accordance with the present invention, the pump noise canceling device for the intervalve measuring device is provided with a compliance estimating device having a memory device for taking samples from pressure velocity measurements obtained from the external liquid flow as a sequence for repeated pump operation. - (12) subtracting a signal related to the pressure measurement in a sequence correlated to the repeated actuation of the pump from successive pressure signal measurements and removing noise from the sensed data before transmitting it to the receiver, processor display device; The stored signal data is updated each pump cycle to adjust the data to changing pump operating conditions.

It is an object of the present invention to overcome current difficulties and provide a pump noise cancellation device.

Another object of the present invention is to provide a pump noise filtering device for a well drilling device, and to provide a matching estimation device to recognize the characteristics and values of pressure pulses from an external liquid circulation pump in a well drilling device; The purpose of this method is to selectively remove the influence of the pump from the pressure modulation data collected from the external liquid flow by using the data transmitted to the surface from the valve gap measurement device by other circuits.

Another object of the present invention is to provide a pump noise cancellation device that adapts to changing pump noise conditions and continuously processes data transmitted to the surface from a ζ (valve spacing device) and provides it to a receiving and processing device. It is to be.

(13) Examples and drawings illustrating the present invention will be described. In each figure, like parts or structures are indicated by the same reference numerals. The embodiments and drawings are illustrative and do not limit the invention.

The present invention can be applied to the spacing measuring device shown in FIG.

The ζ valve spacing measuring device is used in normal well drilling equipment. A wellbore 14 is drilled in a geological formation 16 by means of a drill shaft 12 attached to the bottom end of an IJ ring 10.

The borehole measuring device has at least one sensor 18 at the bottom of the trill string 1o to sense physical parameters of the geological environment of the wellbore. The sensor 18 senses the direction and inclination near the bottom of the hole as an orientation device, for example, or measures temperature, pressure, weight acting on the bit, or any other desired parameter as another device.

Information or data from sensor 18 is transmitted to drill string 1
0 to transmitter 2o. This data is sent to the earth's surface by a transmitter 20. Transmitter 20 of this gap valve measuring device
encodes the data (14) from the sensor 18 into pressure pulsations within the drilling fluid or mat within the drill string 10. This pressure pulsation is transmitted upwardly from the point of generation of the transmitter 2o in the external liquid to the surface device, and the pressure pulsation is detected by the pressure sensor 22. The pressure sensor is connected in communication with a conduit 24 (ζ) which carries the external liquid. The pressure sensor 22 is electrically connected to the receiver 28. The pressure sensor 22 is connected electrically to the receiver 28.
Information retention data is extracted from the measured values obtained from the inner and outer fluid. The pump noise canceling device according to the invention is normally incorporated into the receiver 28 in this intervalve measuring device.

The data is transmitted from the receiver 28 to a data processing and display device 3o, where it is processed, such as mathematical calculations, into a normal usable format and displayed as a visual display, magnetic tape or printed document.

The external liquid circulation pump 26 is a major source of noise or interference, which is eliminated (15) by the apparatus of the present invention. Standard valve pumps are reciprocating piston type pumps, either of the duplex or two piston or duplex or six piston types. Most pumps are single-acting, but some are double-acting.

In either case fluid flow into and out of the pump is controlled by a check valve. During steady operation of the pump, extremely high pressure ζ
(Drilling work is carried out by sending external liquid at a large flow rate. Because the pump is reciprocating and uses a check valve, pressure pulsations occur in the external liquid flow. The characteristics of this pulsation depend on the physical characteristics of each pump. This pressure pulsation is repetitive with respect to the stroke of the pump in the external fluid, creating a periodic pressure pulsation pattern in the external fluid, which causes the external fluid flow conduit 2 to
It is sensed by the pressure sensor 22 in 4. A pump stroke sensor is attached to the external liquid pump 26 to monitor the pump stroke at predetermined points within the pump cycle. This pump stroke sensor has a pickup device 29.
is mechanically attached to the pump and senses the pump position at regularly occurring intervals of the pump stroke cycle, producing data that can be correlated to the pressure cavus cycle of the well fluid.

The output of the pump stroke sensor pickup 29 is connected to a receiver 28 .

FIG. 2 shows a pump noise excess or cancellation circuit according to the invention as a block diagram. The waveforms shown in each part of FIG. 2 indicate the shapes of various signals in each part of the device. A pump stroke sensor of the pump 26 is connected to the timing circuit 2.

The output signal from the pump stroke sensor is a series of pulses at intervals of a sequence corresponding to pump strokes, and the timing circuit 2 uses this pump stroke signal to respond to each stroke of the external fluid circulation pump 26. 1- generates a signal. The output from the timing circuit 2 is a rectangular wave as shown in the figure. The pressure sensor 22 continuously senses pressure pulsations within the external fluid flow conduit 24. When the valve gap measuring device operates, the output signal from the pressure sensor 22 is a combination of the pressure pulsation of the valve gap measuring device and the pressure pulsation generated by the external fluid circulation pump 26, and both pulsations are exists in the external fluid flow conduit 24.The waveform shown in FIG.
17) Represents the output signal from the pressure sensor 22. This signal contains peaks that are significantly higher than others. The large peak represents a positive pressure pulse from pump 26.

Other peaks in this waveform (presumed to have come from the valve-to-valve measuring device, but calibration and identification only by visual inspection are inaccurate; pressure sensor 22) signal is from the fitting estimation circuit 34.
and is supplied to the subtraction circuit 6.

The output of the adaptation estimation circuit 64 is supplied to the subtraction circuit 6.

The suitability estimation circuit 4 receives the output of the timing circuit 32,
Upon receiving the output of the pressure sensor 22, the output is supplied to the subtraction circuit 6. Fit estimation circuit 64 includes circuitry for storing data representative of a particular portion of the pressure sensor output signal that corresponds to the stroke of the pump and is correlated to the output signal of timing circuit 2. The output from the pressure sensor is divided into multiple pressure sample segments between similar portions of each pump stroke interval. The pressure sensor data is sampled and stored by the fitting estimation circuit 4 between the pressure data sample segments. Then, for each stroke (18) of the pump, extract the external liquid pressure sensor data, one for each pressure sample segment. Once the external liquid pressure data samples have been collected, the matching estimation circuit The representative values stored in the compatibility estimation circuit are changed by °C for each repeated stroke of the pump.By doing this, the data stored in the calibration estimation circuit closely follows the pump operation and adapts to changing operating conditions. .

This adaptive estimator 4 acts as a tracking rectifying filter, storing the sum of the previous partial values and correcting them to the value corresponding to the new data sample during a particular pressure sample segment of each pump stroke interval.

The suitability estimation circuit has a memory circuit that stores representative values of data from the pressure sensor. The storage circuitry adapts or changes the retained data to accommodate changes in the data based on well operating conditions.

In general, the adaptation estimation circuit 4 functions as a specific adaptation of a filter called a tracking rectification filter.

As an example of this change in operating conditions, changes in pump operating speed affect the pulse rate of the pump stroke sensor.

Another change that affects the pressure characteristics of the pump is to raise the drill string from the drilling position so that the drill bit 12 is at the bottom of the wellbore (and a short distance above the wellbore). This condition may be used for temporary circulation of extracage fluid.

The memory circuit of the suitability estimation circuit 4 may be an analog type memory circuit or a digital type memory circuit, and is determined according to the designer's wishes.

Regardless of the type of storage circuit used, the operating parameters will be the same in terms of the required functionality of this part of the device. As an example of a specific storage circuit, FIG. 6.5 shows an analog storage circuit that can be used in the apparatus and method of the present invention. The circuit of FIG. 5 will be described in detail after the description of FIGS. 1-6.

In FIG. 1.2, subtractor circuit 36 receives input from pressure sensor 22 and input from suitability estimation circuit 4. In FIG. The subtraction circuit 66 has the function of removing a portion corresponding to pressure pulsations caused by the external liquid circulation pump 26 from the pressure sensor signal. To remove selected portions of the data signal from the pressure sensor data, correlate (20) to the pump stroke by a (20)-timing circuit. Removal of this portion of the pressure sensor signal involves subtracting from the pressure sensor data a representative value of a portion of the pressure sensor signal that occurs in a sequence correlated to repeated pump strokes. The signal obtained by this subtraction procedure is
Since the influence of
The circuit 66.38 is shown in the figure.

Comparator 8 compares the output signal from subtraction circuit 66 with a predetermined signal value to remove spurious parts of the data signal, and sends this signal to a receiver, processing circuit, and display device to reduce the possibility of erroneous data. . A circuit included in the comparator 38 compares the value of the data signal with a predetermined value or a predetermined range value, and from this signal the output signal produced by the comparator is a data signal that conforms to the criteria of being greater than or within the predetermined range value. , which is a temporally correlated signal.

FIG. 2 shows a waveform representative of the output of the comparator 6B. A digital circuit or an encoding circuit can be used for the data signal from the comparator 68, and information data can be extracted from the signal and displayed. Depending on the equipment used, the output of the comparator 68 can be sent to the receiver or to the decoding part of the processing circuit for data processing. FIG. Give an example. A pump stroke sensor 40 is coupled to the extracavity fluid circulation pump 26 to generate the pulsed output signal shown. This output signal is the flip-flop circuit 4
2 to make the signal the rectangular wave shown. Phase-locked loop circuit 14 receives the output of flip-flop circuit 42 and synchronizes the output timing pulse to the timing pulse signal from pump stroke sensor 40 such that each timing/ξ pulse from flip-flop circuit 42 is predetermined with respect to the pump stroke cycle. occupies a certain amount of time. The output from phase-locked loop circuit 44 connects to a fit estimation circuit 640 input.

The output signal of the pressure sensor 22 is connected to a buffer amplifier (22) 460 input to make the value of the pressure signal data available to the adaptive estimation circuit 4 and other parts of the circuit. A typical waveform of this data signal is shown in FIG. 6 between pressure sensor 22 and buffer 46.

This waveform only provides an overview of the waveforms that can occur here. The waveform actually generated is the operating speed of the external liquid circulation pump,
It varies depending on the static pressure of the liquid in the external liquid conduit 24. Since this waveform has a change in shape, it affects the waveform output of the adder circuit 500. The waveforms shown in FIG. 2.6 are schematic or explanatory diagrams of waveforms that actually occur.

The fit estimation circuit 64 described above processes the data signals received from the buffer 46 during pressure sample time segments defined by the timing circuit. Circuit 64c phase lock loop 4
4 and a buffer amplifier 46 and provides a data signal to an input of an inverter 48 .

In the circuit of FIG. 6, the subtracter portion is performed by an inverting amplifier 48 and a summing amplifier circuit or adder 50. The inverting amplifier 48 reverses the sign of the data signal (23) from the circuit 64 and when added to the data signal from the buffer 46, the pressure signal data output from the buffer 46 is stored in the storage circuit of the fit estimation circuit 64. This is the result of subtracting the selected pressure pulse characteristics. The data signal output from the adder 50 has a waveform with a plurality of distinct peaks, as shown in FIG. This data signal is supplied to a comparator 8, which compares a predetermined reference value with the received data signal to select output data.

FIG. 4 shows an analog conformity estimation circuit. The circuit shown in FIG. 4 includes an analog storage circuit and other analog devices and connects to other connections in the device circuit. Like numbers in Figure 6.4 indicate similar elements. A pressure pulse related data signal from pressure sensor 22 is provided to an input of buffer 46 . The output of buffer 46 is split so that one part goes to the input of inverter 48 and the other part goes to the input of a matching estimation circuit or tracking rectification filter. An adaptive estimator or tracking rectifier filter connects a plurality of capacitors 52 in parallel between buffer 46 and multiplexer 54 and between busbars 55 and (24). The multiplex circuit 54 basically functions as a plurality of switches, and connects one capacitor 52 at a time between the ground and the bus 55 in synchronization with the timing signal from the phase-locked loop circuit 44.

The multiplex circuit 54 is a conventional integrated circuit having a number of multiplex sections corresponding to the number of pressure sample segments selected for pump stroke time division. Timing sequence inputs to the clock or multiplex circuit 54 are provided by a plurality of connections from the phase locked loop circuit 44. For each pump stroke time, a plurality of capacitors are each sequentially connected for a respective portion of the pump stroke time, ie, a predetermined pressure sample segment. The capacitors are connected only for the time they are connected, and the value of the data signal is
Charge to the corresponding value. Duplicate charging of the capacitor provides a long-term average of the data signal values during the pressure sample segment, similar to a rectifying filter.

The output of the storage circuit of this adaptation estimation circuit is supplied to the gain amplifier 56 on the bus 55. Gain amplification (25) The output of the amplifier 56 and the input of the inverter 48 are calculated by the adder 50, and this output is amplified by another gain amplification device 58.

The output of amplifier 58 is connected to the input of comparator filter 8, which compares the processed data signal to a predetermined value or range of values, as described above.

When using multiple external fluid circulation pumps in a pump well device and using a valve gap measurement device, multiple pump noise filter devices are arranged in cascade to eliminate the influence of pressure pulsations from each pump. It is necessary to remove them sequentially.

FIG. 5 shows a block diagram of the pump noise filter system described above and is representative of the circuitry used to remove pump noise from pressure canolus data when the well drilling system has more than one extra-drilling fluid circulation pump. The circuit arrangement shown in FIG. 5 uses a single pressure sensor 60 to sense the pressure in the combined flow conduit between the confluence of the flow conduits from the plurality of external liquid pumps and the drill string. This circuit device has a first pump 62 and a second pump 64 as two extracavity liquid circulation pumps (26). The circuit first removes the effects of the first pump 62 from the data signal and then removes the effects of the second pump 64 from the data signal. The first pump 62 has a pump stroke counter circuit that provides a pump stroke timing signal to the first timing circuit 66. Data from a first timing circuit 66 and an off-wall hydraulic sensor 60 are provided to a first adaptation estimation circuit 68 . The output signal from the off-wall liquid pressure sensor 60 becomes a second signal data input to the first fit estimation circuit 68. The output from the first fit estimation circuit 68 is provided along with the signal or data from the pressure sensor 60 to a first subtraction circuit 70 . The output from the first subtraction circuit 60 is data obtained by removing the influence of the first pump 62 from the data of the pressure sensor 60. This data becomes the input to the circuit portion for removing the influence of the second pump 64.

The second pump 64 has a pump stroke counter circuit, the output of which serves as stroke data for the input of the second timing circuit 72 (27). The output of the second timing circuit 72 is supplied to the second adaptation estimation circuit 74 together with the input of the first subtraction circuit 7o. The output of the second adaptation estimation circuit 74 is supplied to a second subtraction circuit 76. The output of the first subtraction circuit 70 is supplied to a second subtraction circuit 76 .

The output of the second subtraction circuit 76 is data obtained by removing pressure pulse noise from both pumps 62, 64 from the pressure signal data, and this data is supplied to a comparator 78 for comparison with a predetermined value as described above. The output from comparator 78 provides data for the receiver, processing device, and display device, as described above.

When using the pump noise filter device according to the invention, the device and the circuit according to the invention, as described above, provide a gap in the data communication medium for pressure pulse variation adjustment communication of the gap gap measuring device. Eliminates noise caused by liquid circulation pump.

The present invention can be used in conjunction with external hydraulic pressure modulation communication devices that use positive or true signal pressure continuous wave, pulse modulation.

Although the embodiment of the present invention has been described as a pressure/ξ pulse modulation data communication system, it can also be used in other modulation systems (28). The suitability estimation circuit of the device of the invention automatically matches any pump and pump noise of any well drilling device. Further, the storage device used in the suitability estimation device can be of an analog type or a digital type depending on the user's wishes.

The present invention can be applied to equipment that uses one pump or multiple pumps.

The sequence of the adaptive estimator is determined by the stroke of the pump, resulting in the data signal, including the pressure data signal, being tuned to store a representative value of the vector. For this, we pump the stored signal from the entire spectrum)
- Removal by the method selected in relation to this will remove a representative value of the noise caused by the pump. Since this noise is the main source of noise in the pressure medium, you have removed the unnecessary part of the pressure pulse data signal, effectively filtering the data signal and providing a digital or analog type that can be easily and accurately used. The data can be converted into , and can be supplied to the processing recording device of the gap gap measuring device.

Although the present invention has been described with reference to preferred embodiments, the present invention (29) can be modified in various ways. For example, the analog storage circuit being described can also be replaced with an analog-to-digital converter as a digital circuit. When using a digital storage circuit, it is also possible to convert analog signals into digital signals in the pressure sensor, pump noise.

Accordingly, the embodiments and drawings are illustrative and do not limit the invention.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a dam valve gap measurement device that is installed on the bottom of an oil well and uses the dam external liquid pressure modulation method.
FIG. 6 is a block diagram of the noise filtering device of the present invention in the case of the circuit shown in FIG. 2, and FIG. 4 is a block diagram of the suitability estimation circuit of the noise filtering device. FIG. 5 is a block diagram of the noise filtering device in the case of two external liquid pumps. 10 Nidrill string 12 Nidrill bit 18, η, 60: Sensor (30) 20: Transmitter 26.62.64: External liquid pump 28: Receiver 32.66.72: Timing circuit 64.68.74 : Compatible estimation circuit 66.70.76: Subtraction circuit 68.78: Comparator 44: Phase-locked loop circuit 46: Buffer amplifier 52: Capacitor 54: Multiple circuit Patent applicant Dresser Industries, Inc. (31 )

Claims (1)

[Scope of Claims] 1. To send a take in the form of a modulated data signal stream from a spigot measurement device in an oil well through the wellbore liquid in a drill string from a data signal stream to A circuit device for eliminating pressure pulsations produced by a circulation pump, comprising: a) a device for generating a first signal responsive to repeated strokes of the external fluid circulation pump; b) a pulsed data stream and a pressure pulse from a liquid circulation pump;
C) a matching estimator that receives the first and second signals and stores a long-term average representative value of the second signal as a sequence related to the first signal and the stroke of the pump; d) the matching estimator and the second signal; (1) coupled to the signal generating device and receiving a second signal, and subtracting the stored signal from the second signal in a sequence related to the pump stroke, the resulting signal being extracted from the valve gap measuring device; 1. A circuit device for a pump noise filter for a gap valve gap measuring device, characterized in that it comprises a subtraction device representative of a data signal transmitted to a liquid. 2. The device for generating the first signal includes a pulse generator that generates a timing pulse signal showing a waveform that repeatedly occurs in correlation with the stroke of the external liquid circulation pump; The apparatus according to claim 1, comprising an inverter circuit connected to receive the storage signal, and an adder circuit for combining the signal from the inverter circuit with a second signal to obtain a result signal. 4. The apparatus of claim 1, further comprising a comparator device for selectively producing an excess output signal indicative of a pulse data signal by comparing the output signal with a predetermined value.4. (2) Between each individual time portion correlated to the first signal, a tracking rectifier filter having an analog storage device receiving each portion of the second signal as an analog signal is provided to retain a representative value of the second signal and to store the representative value of the second signal at a later time. 5. A device as claimed in claim 1 for use in sampling in time segments.5.
5. The device according to claim 4, wherein the capacitor is charged to a value corresponding to the value of the signal. 6. The fitness estimating device comprises a tracking rectifier filter having a digital storage device for receiving the first and second signals (digitally operated and storing the stored signals for each time portion of the second signal occurring in each individual time portion correlated to the first signal). Claim 1, characterized in that the operation produces an output signal for the subtraction device as a representative value.
7. The subtraction device includes a device for receiving a second signal and also for producing a digital equivalent value; The obtained result signal is converted into a digital device (3). 8. The subtraction device comprises a device for subtracting a stored signal in a storage device from a digital equivalent value of a second signal during selected time segments corresponding to pump strokes to produce a resultant signal. equipment. 9. A circuit for removing noise generated by a plurality of co-circulation pumps of a well drilling system from a data signal for transmitting data in the form of a modulated data signal through the well fluid in a drill string from a wellhead measurement system in the well. a) a plurality of devices generating a plurality of first signals responsive to individual repetitive strokes of individual external liquid circulation pumps of a plurality of pumps; C) a device for generating a second signal responsive to fluid pressure within the fluid outside the well, having a noise pressure pulse from the pump and a ξ pulsed data signal; C) a device for generating a respective first signal; 4) A plurality of receivers receiving the first signal and the other data signal and generating a holding signal by holding the representative value of the other data signal in a sequence corresponding to the stroke of each pump discriminated by the first signal. d) each one of the fitness estimating devices coupled to receive the holding signal; each receiving the data signal and subtracting the holding signal from the data signal in a sequence related to the stroke of the respective pump; a plurality of subtraction devices for producing a result signal excluding the influence of the pump; e) a combination of a compatibility estimator and a subtraction device is arranged in cascade, and a set of a compatibility estimator and a subtraction device cooperate with each pump; After removing the effects of the pumps from the data signal, the generated signal is supplied to the next set of compatibility estimator and subtractor, and the data signal supplied to the first compatibility estimator is used as the second signal to the final subtractor. The output signal of is a resultant data signal representative of the data signal transmitted from the drill string to the drill string from the drill string to the drill string. circuit device. (5) 10) Noise generated by the multiple co-circulation pumps of the well drilling system to transmit data in the form of a modulated data signal from the in-well gauging device through the well fluid in the drill string. a) means for generating a plurality of first signals, each responsive to a repetitive stroke of a synergistic circulation pump; and b) a plurality of first signals supporting a modulated data stream and comprising: C) a device for generating a second signal responsive to fluid pressure within the external liquid, including noise pressure pulses from a circulating pump; 1
and a second signal and retaining representative values of the second signal in a sequence related to the first signal and the stroke of the first pump; d) a first compatibility estimation device; A second signal coupled to the adaptive estimator calculates the effect of the pump by subtracting the above-mentioned representative (6) value of the second signal in a sequence related to the stroke of the pump from the second signal. a first subtraction device for generating a removed first result signal; e) cooperating with another external fluid circulation pump and its device for generating the first signal, the first signal and the second signal; and a) another fitness estimating device coupled to said another fitness estimating device and retaining other representative values of the first signal and a second signal associated with the stroke of the other pump; receiving the signal and subtracting the retained representative value of the second signal from the second signal in a sequence related to the strokes of the other pump to generate a second resultant signal of the second signal; Another subtraction device that removes the influence of noise from the pump;
g) Receive the second result signal and compare it with a predetermined characteristic;
a comparator device for generating an output signal correlated to a second result signal when the result signal of the second result signal is within a characteristic. 11) An inter-well valve measuring device for a well-hole valve system having an external liquid circulation pump; (7) a) installed in the drill string to sense geological parameters in the wellbore, a) a sensor that generates a data signal representative of the data signal; b) a transmitter that transmits the representative value of the data signal as a transmission data signal using a hydraulic modulation data transmission method; a receiver which receives the transmitted data by means of a pressure transducer in communication with the external liquid and generates an output representative of the sensor data signal and which is representative of the sensed physical parameter; a filter device which eliminates the pressure pulse effects of the external liquid circulation pump and obtains a noise-free transmitted data signal; e) the filter device includes a timing device that senses the stroke of the pump and generates a timing signal representative of the stroke; The circuit, which receives the timing signal and the pressure data signal from the pressure transducer, temporarily stores the data signal from the pressure transducer in relation to the timing signal and represents a long-term value for the pressure data signal at the timing. a fitting estimator that produces an output signal correlated to the signal; and a synthesis system that receives the pressure data signal from the pressure transducer and subtracts the fitting estimator output signal in correlation to the timing signal to represent the sensor data signal. a subtraction device for reproducing the data signal; and receiving the combined data signal and comparing the data signal with a predetermined value, and outputting a data signal related to the sensed geological parameter representing the data signal of the sensor when the data signal is within predetermined limits. An oil well well gap measurement device, characterized in that it is equipped with a comparator that generates . 12) The timing signal of the timing circuit device is representative of the stroke speed of the external liquid circulation pump and its segment divisions; the pressure transducer data is provided to the conformance estimation device as a plurality of data segments corresponding to the segment divisions of the timing signal; The apparatus according to claim 11, further comprising a storage device for storing pressure transducer data and retrieving representative values of the pressure transducer data. 12. The apparatus of claim 11, further comprising receiving a timing signal and a pressure data signal from a pressure transducer and providing a filtered output signal to a subtraction device. 14) The apparatus of claim 11, wherein the data signal transmitter modulates and transmits the data signal into the drilling fluid using pulse modulation.