EP0078907A2 - Dispositif de filtrage du bruit de la pompe pour un système de mesure pendant le forage d'un puits utilisant la détection de la pression du fluide de forage - Google Patents

Dispositif de filtrage du bruit de la pompe pour un système de mesure pendant le forage d'un puits utilisant la détection de la pression du fluide de forage Download PDF

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Publication number
EP0078907A2
EP0078907A2 EP82108793A EP82108793A EP0078907A2 EP 0078907 A2 EP0078907 A2 EP 0078907A2 EP 82108793 A EP82108793 A EP 82108793A EP 82108793 A EP82108793 A EP 82108793A EP 0078907 A2 EP0078907 A2 EP 0078907A2
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EP
European Patent Office
Prior art keywords
signal
pump
data
drilling fluid
drilling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP82108793A
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German (de)
English (en)
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EP0078907A3 (fr
Inventor
Gary Dean Berkenkamp
Ross Edward Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dresser Industries Inc
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Dresser Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dresser Industries Inc filed Critical Dresser Industries Inc
Publication of EP0078907A2 publication Critical patent/EP0078907A2/fr
Publication of EP0078907A3 publication Critical patent/EP0078907A3/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E21B47/18—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry

Definitions

  • This invention is related to data transmission systems for borehole telemetry or measurement while drilling systems. More specifically the invention is related to a measurement while drilling system wherein data is transmitted from the downhole instrument through pressure pulsations of the drilling fluid within the drill string to the earth's surface.
  • the invention is directed to an apparatus for filtering data passed through pressure pulsations in the drilling fluid from downhole equipment to the earth's surface in order to remove the influence of data disturbing pressure pulsations occurring because of the drilling fluid circulating pump.
  • a measurement while drilling system utilizing mud pressure pulsation as a technique to transfer data, it is subject to interference caused by other pressure pulsations in the drilling fluid flow path.
  • the primary source of these interferring pressure pulsations is the circulating pump(s) for the drilling fluid or mud.
  • This circulating pump contains a plurality of pistons, valves and other mechanical hardware that not only move the drilling fluid through the drill string but create pressure pulsations which represent noise or interference with respect to the pressure pulsations produced by the transmitter of the measurement while drilling equipment. Because the measurement while drilling system uses the drilling fluid as a pathway for transmission of data noise or pressure interference is undesirable.
  • the noise or interference in pressure pulses produced by the drilling fluid circulating pump can be of such a magnitude that it will substantially mask or obscure the data from the measurement while drilling equipment unless it is properly removed by the data receiving equipment at the earth's surface.
  • the character of the interference produced by a particular drilling fluid circulating pump is not uniform and will vary between types of pumps, manufactures of pumps, and even between identical pumps at a installation. Also, the characteristic pressure pulsations for a specific pump will change in relation to the operating speed of the pump.
  • a pump noise filtering apparatus for a borehole measurement while drilling system includes an adaptive estimator having a memory that utilizes samples of pressure and velocity measurements taken from the drilling fluid flow stream in a sequence related to cyclic operation of the mud pump. Signals related to these pressure measurements are stored and then removed from the continuing pressure signal measurements in a sequence correlated to the pumps cyclic operation in order to remove this noise or interference from the sensed data prior to passing it into a receiver, processor and display portion of the measurement while drilling system. The stored signal data is refreshed with each pump cycle in order to adjust the data for changing pump noise conditions.
  • One object of this invention is to provide a pump noise cancelling apparatus overcoming the aforementioned difficulty in the art.
  • one other object of this invention is to provide a pump noise cancelling or filtering apparatus for a measurement while drilling system that has an adaptive estimator that will selectively recognize the character and magnitude of the pressure pulse influences from a drilling fluid circulating pump or mud pump of a drilling rig and including other circuitry that will selectively remove this influence from the pressure modulated data from the measurement while drilling system that is extracted from the drilling fluid flow stream in the transmission of this data to the earth's surface.
  • Another object of this invention is to provide a pump noise cancelling apparatus that will adapt to changing pump noise or interference conditions in order to provide substantially continuous reception of data that is transmitted from a downhole measurement while drilling sensing instrument to associated receiving and processing equipment at the earth's surface without regard to the modulation technique used to transmit the data.
  • This invention may be embodied in a borehole measurement while drilling system as illustrated in Fig. 1.
  • the borehole measurement while drilling system is used with conventional well drilling equipment wherein a drill string 10 comprised of segments of drilling pipe having a drilling bit 12 at the bottom end thereof are used to drill a borehole 14 through an earth formation 16.
  • the measurement while drilling apparatus includes at least one sensor 18 in the lower portion of drill string 10 to sense a physical parameter of the geophysical borehole environment.
  • Sensor 18 can for example be an orientation device to sense the direction and inclination of the adjoining portion of orehole, or it can be one or more other devices that are, ,erable to measure borehole temperature, presaure, weight applied to the bit, or a variety of other parameters that may be desired.
  • Transmitter 20 in this type of measurement while drilling system is a device known in the art to encode data from sensor 18 into pressure pulsations in the drilling fluid or mud that is contained within drill string 10. These pressure pulsations travel through the drilling fluid or mud upward from their point of origin at transmitter 20 to the surface equipment where the pressure pulsations are sensed by a pressure sensor 22.
  • Pressure sensor 22 is communicably connected with the interior of a conduit 24 through which the drilling fluid or mud passes. This conduit 24 is in a portion of the drilling flow loop between the drilling fluid mud pump 26 and a swivel connection 27 at the upper end of drill string 10.
  • Pressure sensor 22 is electrically connected with a receiver 28 that is used to extract the intelligence carrying data from the pressure measurements taken at drilling fluid flow line conduit 24.
  • the pump noise filtering or cancelling apparatus of this invention would normally be contained within receiver 28 of this measurement while drilling system.
  • From receiver 28 the data is transmitted to a data processor and display apparatus 30 that is operable for mathematically manipulating, further processing, and displaying the data in a desired and usable form such as a visual representation, a magnetic tape or a printed document.
  • Drilling fluid circulating pump 26 is the primary source of the noise or interference that is sought to be removed by the apparatus of this invention.
  • this pump is a reciprocating piston type pump in either a duplex (two piston) or triplex (three piston) construction.
  • a great many of these pumps are single acting pumps however some of them may be double acting pumps. In either case they have the fluid flow into and out of them controlled by check valves.
  • the normal operation of these pumps will provide a substantially high pressure source of drilling fluid at a significant flow rate for the normal drilling operation as is well known in the industry. Because of the reciprocating nature of these pumps and their use of check valves, they produce pressure pulsations in the drilling fluid flow stream.
  • Drilling fluid pump 26 is fitted with a pump stroke sensor to permit the monitoring of the pump's strokes at a preselected point within its pumping cycle.
  • This pump stroke sensor includes a pickup device 29 that is mechanically mounted at the pump and adapted to sense the pump's position at a regular occurring interval of the pump stroke cycle in order to provide data for correlating the pressure pulse cycle of the drilling fluid.
  • the output of pump stroke sensor pickup 29 is connected to receiver 28.
  • Fig. 2 shows a schematic representation of the pump noise filtering apparatus circuitry of this invention in a block diagram form.
  • the wave forms shown at various portions of Fig. 2 indicate the shape of the various signals at the several portions of the apparatus.
  • Pump 26 has its pump stroke sensor connected to a timing circuit 32.
  • the output signal from the pump stroke sensor is a plurality of pulses spaced apart in a sequence corresponding with strokes of the pump so that timing circuit 32 can use this pump stroke signal to generate a signal that is responsive to the repetitive strokes of drilling fluid circulating pump 26.
  • the output from timing circuit 32 is chosen to be a square wave as illustrated.
  • Pressure sensor 22 provides continuous pressure sensing of pressure pulsations or fluctuations in drilling fluid flow line conduit 24. When the measurement .
  • the output signal from pressure sensor 22 contains the combined pressure pulsations of the measurement while drilling transmitter and the pressure pulsations emanating from drilling fluid circulating pump 26 because both of these are present in the drilling fluid flow line conduit 24.
  • the wave form shown in Fig. 2 is representative of the output signal from pressure sensor 22. This signal contains some peaks that are significantly higher than others. The larger peaks are representative of positive pressure pulses from pump 26. Other peaks in this wave form can possibly be suspected as coming from the measurement while drilling transmitter. However specific correlation and identification of this data by only a visual examination is ineffective and inaccurate.
  • the signal from pressure sensor 22 is directed into an adaptive estimator circuit 34 and also into a subtraction circuit 36.
  • the output from adaptive estimator circuit 34 is also directed into subtraction circuit 36.
  • Adaptive estimator circuit is connected to receive the output from timing circuit 32, to receive an output from pressure sensor 22, and provide an output that is fed into subtraction circuit 36.
  • Adaptive estimator circuit 34 is provided with circuitry to memorize or store data that is representative of specific portions of the pressure sensor output signal in correspondence with strokes of the pump and in correlation with the output signal from timing circuit 32.
  • the output from the pressure sensor is divided into a plurality pressure sample segments between like portions of each pump stroke interval. During each pressure data sample segment the pressure sensor data is sampled by and stored in adaptive estimator circuit 34. Thus for each stroke of the pump (one pump stroke interval) a plurality of samples of the drilling fluid pressure sensor data are taken (one in each pressure sample segment).
  • adaptive estimator circuit 34 performs the function of a tracking commutative filter which is to estimate the approximate value of the following data sample in each pressure sample segment by retaining the sum of previous such weighted values and modifying or adjusting that value to correspond with a new data sample during that particular pressure sample segment of each pump stroke interval.
  • This adaptive estimator circuit 34 includes a memory that functions to retain a representative of the data from the pressure sensor. This memory must be capable of adapting or varying its retained data to accommodate changing data that is resultant from the operating conditions at a well.
  • the adaptive estimator circuit 34 functions as a specific adaptation of a filter generally known as a tracking commutative filter.
  • a changing condition is a simple change in the pump's operating speed that would affect the pulse rate from the pump stroke sensor.
  • An additional change that might influence the pump's pressure pulse characteristics would be raising the drill string from the drilling position so that drill bit 12 instead of being at the bottom of the borehole is in an elevated position a short distance above the borehole bottom. This is a condition that might be used for temporary circulation of the drilling fluid.
  • the memory of adaptive estimator circuit 34 can be an analog type memory circuit or it can be a digital type memory circuit depending upon the desire of the designer. Regardless of which type of memory circuit is used the operable parameters are the same because of the needed function this portion of the apparatus.
  • Figs. 3 and 5 depict an analog memory circuit that can be used with the apparatus and method of this invention. The circuit of Fig. 5 will be described in greater detail following the description of Figs. 1-3.
  • subtraction circuit 36 is provided with an input from pressure sensor 22 and an input from adaptive estimator circuit 34.
  • Subtraction circuit 36 functions to remove from the pressure sensor signal those portions which are indicative of the pressure pulsations that are sequenced with and related to drilling fluid circulating pump 26. This removal of the selected portions of the data signal from the pressure sensor is done in correlation with the pump strokes as by timing circuit 32. Removal of these portions of the pressure sensor signal is done by subtracting from the pressure sensor signal a value representative of those portions of the pressure sensor signal which occur in a repetitive, correlatable sequence with the pump's strokes.
  • the resultant signal from this subtraction or removal process carries the intelligence data from the transmitter of the measurement while drilling apparatus with the distorting influence of drilling fluid circulating pump 26 having been substantially removed.
  • a wave form generally representative of this signal is shown in Fig. 2 between subtraction circuit 36 and 38.
  • Comparator 38 performs a function of comparing the output signal from subtraction circuit 36 with a predetermined signal value in order to eliminate spurious or extraneous portions of the data signal prior to passing the signal to the receiver, processor and display in order to reduce the possibility of erroneous data.
  • Comparator 38 includes a circuit that compares the value of the data signal with a predetermined value or range of values (at the desire of the user) and from this signal the comparator provides an output signal indicative of and timewise correlatable with the data signal that is representative of those portions of the data signal that meet the criteria of being greater than or being within a predetermined range of values.
  • a wave form representative of the output of comparator 38 is illustrated in Fig. 2.
  • the data signal shown is in a form that can be utilized by appropriate digital, encoding equipment and circuitry to remove and decode the intelligence data from the signal.
  • the output from comparator 38 can pass into a decoding portion of the receiver or processor for further data manipulation, handling, etc.
  • Fig. 3 shows in block diagram schematic form an embodiment of the adaptive estimator circuit and the subtraction circuit portions of this invention.
  • Pump stroke sensor 40 associated with drilling fluid circulating pump 26 provides a pulsed output signal as shown.
  • This output signal is fed into a flip flop circuit 42 that shapes the signal into a rectangular wave form as illustrated.
  • Phase lock loop circuit 44 receives the output from flip flop circuit 42 and functions to synchronize its output timing pulses with the timing pulse signal from pump stroke sensor 40 so that each timing pulse from flip flop circuit 42 occupies a fixed and constant time interval with respect to the pump stroke cycle.
  • the output from phase lock loop circuit 44 is connected to an input of adaptive estimator circuit 34.
  • Pressure sensor 22 has its output signal connected to the input of a buffer amplifier 46 that functions to condition the magnitude of this signal for use by the adaptive estimator circuit and in other portions of the circuit.
  • a generally representative wave form of this data signal is illustrated in Fig. 3 between pressure sensor 22 and buffer 46.
  • this wave form is only generally representative of the wave form that can occur at this location.
  • the specific shape of the typical or representative wave form will vary depending upon the speed of operation of the drilling fluid circulating pump and also upon the static pressure in the drilling fluid conduit 24. Because this wave form is subject to some changes in shape it will influence the wave form output from adder circuit 50.
  • the illustrated wave forms shown in Figs. 2 and 3 are to be considered as approximate or representative or illustrative of the actual wave forms that may be present in actual practice of this invention.
  • Adaptive estimator 34 is described above and functions to prewhiten or process before manipulation the data signal received from buffer 46 during the pressure sample time segments designated by the timing circuit. It receives signals from phase lock loop 44 and from buffer 46 and provides a data signal to the input of an inverter 48.
  • the subtraction portion of this circuit is accomplished in this embodiment by an inverting amplifier 48 coupled with an adding amplifier circuit or adder 50.
  • Inverting amplifier 48 inverts or changes the sign of the data signal from adaptive memory 34 so that when it is added to the data signal from buffer 46 the result will be an additive removal or subtraction of the representations of the selected pressure pulse characteristics stored in the memory of adaptive estimator 34 from the pressure data signal output of buffer 46.
  • the resultant data signal output from adder 50 can be in a waveform that has a plurality of well defined peaks as illustrated in Fig. 3. This resultant data signal is then supplied to comparator 38 for selection of the output data signal by comparing the received data signal with predetermined reference values as described previously.
  • FIG. 4 An example of an analog type of adaptive estimator is shown in Fig. 4.
  • the circuit shown in Fig. 4 includes an analog type of memory and other analog devices to interface with other connecting portions of the circuitry in this apparatus. Similar elements in Figs. 3 and 4 have the same numerals.
  • the pressure pulse related data signal from pressure sensor 22 is supplied to the input of buffer 46.
  • the output of buffer 46 is divided with one portion going to the input of inverter 48 and the other portion going to the input of the adaptive memory or tracking commutative filter.
  • the adaptive memory or tracking commutative filter has a plurality of capacitors 52 connected in parallel between a buss line 55 carrying the output from buffer 46 and a multiplexing circuit 54.
  • Multiplexing circuit 54 basically functions as a plurality of switches that function to connect the plurality of capacitors 52 one at a time between ground and buss line 55 in sequence with timing signals from phase lock loop circuit 44.
  • Multiplexing circuit 54 can be a conventional integrated circuit having a plurality of multiplexing parts corresponding with the number of pressure sample segments that are selected for divisions of the pump stroke interval.
  • the clock or timing sequence input to multiplexer 54 is through a plurality of connections from phase lock loop circuit 44.
  • For each pump stroke interval the plurality of capacitors are each sequentially connected during their associated portion of the pump stroke interval or during their designated pressure sample segment of that interval.
  • the capacitors are each charged to a value approximating the value of the data signal during the interval in which they are individually connected. Charging the capacitors in this manner provides a long term average of the data signal value during the pressure sample segment time interval as is well known in commutative filters.
  • the output from this adaptive memory is via the buss line 55 to a gain amplifier 56.
  • the output of gain amplifier 56 and the output of inverter 48 are combined at adder 50 (enclosed in dashed lines) with the composite resulting signal being additionally increased by another gain amplifier 58.
  • the output of amplifier 58 is connected to the input of comparator 38 or comparison of the processed data signal with a predetermined value or range of values as described in the preceding.
  • Fig. 5 illustrates in schematic block diagram form such a pump noise filtering apparatus which is representative of that which could be utilized filter the pump noise or interference in the pressure pulse data for a drilling rig having two or more drilling fluid circulating pumps.
  • the circuit shown in Fig. 5 includes a single pressure sensor 60 adapted to sense the pressure on a drilling rig in the drilling fluid flow conduit at a point between the location where fluid flow from the plurality of mud pump flow conduits merge and the location where this combined flow passes into the drill string.
  • This circuit is shown with a pair of drilling fluid circulating pumps identified as a first pump 62 and a second pump 64. In this circuit the effect of the first pump 62 is first removed from the data signal then the effect of the second pump 64 is removed from the data signal.
  • the first pump 62 is provided with a pump stroke counter circuit that provides pump stroke timing signals to first timing circuit 66.
  • Data from first timing circuit 66 and a drilling fluid pressure sensor 60 are supplied to a first adaptive memory 68.
  • the output signal from drilling fluid pressure sensor 60 is a second signal data input to first adaptive estimator circuit 68.
  • the output from first adaptive estimator 68 is supplied to a first subtraction circuit 70 along with the signal or data from pressure sensor 60.
  • the output from first subtraction circuit 70 is essentially the data of pressure sensor 60 with the effect of the first pump 62 removed therefrom. This data provides the input to the portion of the circuit for eliminating or filtering the effect of the second pump 64.
  • Second pump 64 is provided with a pump stroke counter circuit the output of which provides sequential pump stroke data to the input of second timing circuit 72.
  • the output from second timing circuit 72 is to one input of second adaptive estimator 74 along with an input from first subtraction circuit 70.
  • the output of second adaptive estimator 74 is coupled to one input of second subtraction circuit 76.
  • An output from first subtraction circuit 70 is provided to second subtraction circuit 76.
  • the output from second subtraction circuit 76 has the effect of pressure pulse interference from both pumps 62 and 64 removed or filtered from the pressure signal data and this data is supplied to comparator 78 for comparison with a preselected range of values as described above.
  • the output from comparator 78 is to a data receiver, processor and display essentially as described in the preceding embodiment.
  • the pump noise filtering apparatus of this invention provides a combination of apparatus and circuitry for substantially removing the noise or interference caused by a drilling rig's well drilling fluid circulating pump into the data communication medium for a pressure pulse modulation type system of communication in a measurement while drilling system.
  • This invention is operable with mud pressure modulated communication systems utilizing positive or negative signal pressures and continuous wave or pulse modulation. Although this invention is described with a pressure pulse modulated data transmission system it is to be understood that it is equally operable with other modulation systems. Because of the adaptive estimator this apparatus will adapt itself to the particular pump and pump noise environment of a particular drilling rig.
  • the form of memory used in the adaptive estimator can be either an analog form or a digital form depending upon the equipment choice of the user.
  • This apparatus can be used with installations having a single pump or installations having multiple pumps. Because the adaptive estimator is sequenced with the strokes of the associated pump it is in effect tuned to memorize representations of the data signal spectrum in which the pressure data signal is contained. Thus, when the memorized signal is removed from the entire spectrum in a selective manner coordinated with the pump strokes it is adapted to remove a representation of the noise due to the pump.
  • this particular noise is the major contributor to noise or interference in this pressure medium it removes the undesirable portions of the pressure pulse data signal thereby in effect filtering the data signal so that it can be easily and accurately converted to a usable digital or analog form compatible with the measurement while drilling systems processing and recording equipment.
  • the described analog memory could be a digital memory provided with appropriate analog to digital conversion circuitry. Also provided that a digital memory is used the conversion from an analog signal to a digital signal could be made at the pressure sensor and at the pump sensor if desired.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geophysics (AREA)
  • Acoustics & Sound (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Measuring Fluid Pressure (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP82108793A 1981-11-09 1982-09-23 Dispositif de filtrage du bruit de la pompe pour un système de mesure pendant le forage d'un puits utilisant la détection de la pression du fluide de forage Withdrawn EP0078907A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31949881A 1981-11-09 1981-11-09
US319498 1981-11-09

Publications (2)

Publication Number Publication Date
EP0078907A2 true EP0078907A2 (fr) 1983-05-18
EP0078907A3 EP0078907A3 (fr) 1984-09-05

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EP82108793A Withdrawn EP0078907A3 (fr) 1981-11-09 1982-09-23 Dispositif de filtrage du bruit de la pompe pour un système de mesure pendant le forage d'un puits utilisant la détection de la pression du fluide de forage

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EP (1) EP0078907A3 (fr)
JP (1) JPS5886295A (fr)
CA (1) CA1189442A (fr)
NO (1) NO823369L (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159314A1 (fr) * 1983-09-26 1985-10-30 Exploration Logging, Inc. Filtre d'amortissement du bruit
GB2247905A (en) * 1990-09-10 1992-03-18 Teleco Oilfield Services Inc Analysis and identification of a drilling fluid column channel filter characteristics based on decoding of measurement while drilling signals.
EP0535729A2 (fr) * 1991-10-02 1993-04-07 Anadrill International SA Système de suppression du bruit d'une pompe à boue
FR2861800A1 (fr) * 2003-09-17 2005-05-06 Schlumberger Services Petrol Systeme de liaison descendante pour forage et procede de production d'un signal utilisant une pompe de liaison descendante a mouvement alternatif
NO20042651A (no) * 2004-06-24 2005-11-14 Nat Oilwell Norway As Fremgangsmåte for å kansellere pumpestøy ved brønntelemetri
WO2006069060A1 (fr) * 2004-12-21 2006-06-29 Baker Hughes Incorporated Estimation d'impedance de capteur double pour signaux de telemetrie de liaison montante
WO2007095153A1 (fr) * 2006-02-14 2007-08-23 Baker Hughes Incorporated Système et procédé de suppression du bruit de pompage dans un système de télémétrie par impulsions dans la boue
WO2016093819A1 (fr) * 2014-12-10 2016-06-16 Halliburton Energy Services, Inc. Dispositifs et procédés de filtrage d'interférences de pompe dans la transmission d'impulsions par la boue
CN112554875A (zh) * 2020-12-08 2021-03-26 中国石油天然气集团有限公司 随钻泥浆正脉冲信号的处理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016089420A1 (fr) 2014-12-05 2016-06-09 Halliburton Energy Services, Inc. Appareil, systèmes et procédés d'étalonnage d'horloge en fond de trou

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714623A (en) * 1971-06-08 1973-01-30 Schlumberger Technology Corp Memorizer
US4093923A (en) * 1976-12-22 1978-06-06 Shell Oil Company Signal cancelling circuit
GB2009473A (en) * 1977-12-05 1979-06-13 Gearhart Owen Industries Borehole while drilling

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714623A (en) * 1971-06-08 1973-01-30 Schlumberger Technology Corp Memorizer
US4093923A (en) * 1976-12-22 1978-06-06 Shell Oil Company Signal cancelling circuit
GB2009473A (en) * 1977-12-05 1979-06-13 Gearhart Owen Industries Borehole while drilling

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159314A4 (fr) * 1983-09-26 1986-07-23 Exploration Logging Inc Filtre d'amortissement du bruit.
EP0159314A1 (fr) * 1983-09-26 1985-10-30 Exploration Logging, Inc. Filtre d'amortissement du bruit
GB2247905A (en) * 1990-09-10 1992-03-18 Teleco Oilfield Services Inc Analysis and identification of a drilling fluid column channel filter characteristics based on decoding of measurement while drilling signals.
GB2247905B (en) * 1990-09-10 1994-10-12 Teleco Oilfield Services Inc Analysis and identification of a drilling fluid column channel filter characteristics based on decoding of measurement while drilling signals
EP0535729A2 (fr) * 1991-10-02 1993-04-07 Anadrill International SA Système de suppression du bruit d'une pompe à boue
EP0535729A3 (en) * 1991-10-02 1993-05-19 Anadrill International Sa Mud pump noise cancellation system
US7198102B2 (en) 2003-09-17 2007-04-03 Schlumberger Technology Corporation Automatic downlink system
FR2861800A1 (fr) * 2003-09-17 2005-05-06 Schlumberger Services Petrol Systeme de liaison descendante pour forage et procede de production d'un signal utilisant une pompe de liaison descendante a mouvement alternatif
US7380616B2 (en) 2003-09-17 2008-06-03 Schlumberger Technology Corporation Automatic downlink system
US7320370B2 (en) 2003-09-17 2008-01-22 Schlumberger Technology Corporation Automatic downlink system
US7830749B2 (en) 2004-06-24 2010-11-09 National Oilwell Norway As Method of filtering pump noise
WO2006001704A1 (fr) * 2004-06-24 2006-01-05 National Oilwell Norway As Procede de filtration de bruit de pompe
NO20042651A (no) * 2004-06-24 2005-11-14 Nat Oilwell Norway As Fremgangsmåte for å kansellere pumpestøy ved brønntelemetri
GB2437209B (en) * 2004-12-21 2009-02-25 Baker Hughes Inc Two sensor impedance estimation for uplink telemetry signals
GB2437209A (en) * 2004-12-21 2007-10-17 Baker Hughes Inc Two sensor impedance estimation for uplink telemetry signals
WO2006069060A1 (fr) * 2004-12-21 2006-06-29 Baker Hughes Incorporated Estimation d'impedance de capteur double pour signaux de telemetrie de liaison montante
US7577528B2 (en) 2006-02-14 2009-08-18 Baker Hughes Incorporated System and method for pump noise cancellation in mud pulse telemetry
WO2007095153A1 (fr) * 2006-02-14 2007-08-23 Baker Hughes Incorporated Système et procédé de suppression du bruit de pompage dans un système de télémétrie par impulsions dans la boue
GB2449196A (en) * 2006-02-14 2008-11-12 Baker Hughes Inc System and method for pump noise cancellation in mud pulse telemetry
GB2449196B (en) * 2006-02-14 2011-05-11 Baker Hughes Inc System and method for pump noise cancellation in mud pulse telemetry
WO2016093819A1 (fr) * 2014-12-10 2016-06-16 Halliburton Energy Services, Inc. Dispositifs et procédés de filtrage d'interférences de pompe dans la transmission d'impulsions par la boue
GB2545865A (en) * 2014-12-10 2017-06-28 Halliburton Energy Services Inc Devices and methods for filtering pump interference in mud pulse telemetry
US10502052B2 (en) 2014-12-10 2019-12-10 Halliburton Energy Services, Inc. Devices and methods for filtering pump interference in mud pulse telemetry
CN112554875A (zh) * 2020-12-08 2021-03-26 中国石油天然气集团有限公司 随钻泥浆正脉冲信号的处理方法

Also Published As

Publication number Publication date
JPS5886295A (ja) 1983-05-23
CA1189442A (fr) 1985-06-25
EP0078907A3 (fr) 1984-09-05
NO823369L (no) 1983-05-10

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