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WO1999036802A1 - Systeme electronique numerique a couplage inductif fonctionnant en fond de puits - Google Patents

Systeme electronique numerique a couplage inductif fonctionnant en fond de puits Download PDF

Info

Publication number
WO1999036802A1
WO1999036802A1 PCT/US1999/000124 US9900124W WO9936802A1 WO 1999036802 A1 WO1999036802 A1 WO 1999036802A1 US 9900124 W US9900124 W US 9900124W WO 9936802 A1 WO9936802 A1 WO 9936802A1
Authority
WO
WIPO (PCT)
Prior art keywords
instrument
power
modulation
location
frequency
Prior art date
Application number
PCT/US1999/000124
Other languages
English (en)
Inventor
Leroy C. Delatorre
Original Assignee
Panex Corporation
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 Panex Corporation filed Critical Panex Corporation
Publication of WO1999036802A1 publication Critical patent/WO1999036802A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of AC
    • G08C19/14—Electric signal transmission systems in which the signal transmitted is frequency or phase of AC using combination of fixed frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5475—Systems for power line communications adapted for drill or well combined with data transmission

Definitions

  • This invention relates to data and power communication between a surface location or station and a well tool in a well bore, and more particularly, to a system for transmitting power from a surface location to a downhole well tool or tools and for selectively communicating data signals between the surface location and a well tool for selective retrieval of data from a well tool.
  • the tools typically are desired to measure parameters such as pressure, temperature, fluid flow and density. Because such tools utilize electronics and have other components which may require attention from time to time, the tools can be made to be retrievably set in side pockets located along the well string. Alternatively, tools can be installed on a non-retrievable basis. Thus, the tools can be retrieved as deemed necessary from time to time.
  • a side pocket or side pockets or retrievable tools are respectively coupled by a single wire conductor cable to equipment at the surface location.
  • an inductor coupler component usually a probe member
  • the well tool obtains its electrical power from internal DC batteries.
  • Data communication is effected via the conductor cable. It is desirable to eliminate the requirement for non-retrievable electronics in the well tool and to communicate data from a well tool by supplying the power and communication data on a common conductor cable. Since the inductive coupling components basically define a transformer, the power and data communication functions must be accomplished with AC voltages and currents which are impressed upon a conductor cable line.
  • a power source with a selected frequency is utilized to supply AC power via a conductor cable to one or more downhole inductor coupling component(s).
  • a downhole well tool(s) with a cooperating inductor coupling component has a full wave rectifier which supplies operating DC power for the well tool.
  • a well tool configured for use with the present invention includes a parameter sensing means for sensing pressure, temperature, fluid flow or density which senses the parameter and develops a digital signal as a function of the sensed parameter. The digital signal measurements are stored in an addressable gate array unit and are output when addressed in a current modulation transmission mode. Also in the well tool is a level detector which senses the rectified output of the rectifier and detects an amplitude modulation of the rectified output signal for providing a digital address to the well tool gate array logic unit.
  • the downhole tool obtains DC power from a rectifier and detects an address signal modulated on the power frequency.
  • a discrete digital address for a given well tool is provided by a
  • Frequency Shift Keying (FSK) communication signal which is impressed upon the power frequency.
  • FSK frequencies of 600 and 1200 Hz are adequately high for data purposes and, of course, separate the 0 and 1 bits of a digital signal.
  • the amplitude modulation of the FSK communication signals on the power frequency is automatically demodulated by the power rectification in the well tool so that all that is required is to separate the modulation frequency from the power frequency ripple. This is accomplished by a filter capacitor selected so that the ripple frequency amplitude of the rectified signal is significantly smaller than the modulation frequency amplitude. A level detector then rejects the smaller amplitude ripple frequency and follows the larger amplitude modulation.
  • the power frequency is selected as an exact multiple of the modulation frequencies (4.8 Khz) which mimmizes the possibility of introducing a DC signal component into the line frequency.
  • Data transmission is effected by a well tool current modulation means which modulates the power current as a function of the data being transmitted by the well tool in response to the address signal.
  • a current demodulation transforms the current signals into digital signals representative of the well tool signals.
  • FIG. 1 is a schematic representation of a well bore application of the present invention
  • FIG. 2 is a schematic representation of side pocket with a well tool
  • FIG. 3 is a schematic illustration of the present invention.
  • the well bore 10 includes a cemented liner or casing 14 and a production tubing string 16.
  • the production tubing string 16 may have a number of spaced apart side pocket mandrels, two such pockets 18,20 being illustrated.
  • a side pocket mandrel is constructed and arranged to retrievably receive a well tool 21 for measuring downhole parameters such as pressure, temperature, density and fluid flow (See FIG. 2).
  • a well tool 21 contemplated by the present invention utilizes an inductive coupler which includes an interfitting pocket 23 on a well tool and a probe 25 in a side pocket mandrel.
  • Inductor coils provide for supplying power and coupling digital data signals from a well tool to a conductor wire 22 which extends to a surface location.
  • electronics have been incorporated within the pin inductive coupler to allow DC power voltage to be used on the cable, these were not retrievable.
  • the power supply can be located at the surface location and both power and data communications can be implemented on a common communication carrier.
  • An objective of the present invention is to provide the capability to supply power and simultaneously communicate digitally with one or more downhole gauges or well tools which are connected by means of inductive couplers to the same cable. Since inductive couplers are essentially transformers, all functions must be accomplished by means of AC voltages and currents impressed on the communication carrier line.
  • each well tool 24,26 (shown in dashed line) is coupled by an inductive coupler component 28,30 to an inductive coupler component 32,34 in a side pocket mandrel 32a, 34a (shown in dashed line).
  • an AC power voltage is supplied by an oscillator 40 via a modulator 42 and line driver 44 to apply AC power to all of the inductive couplers on a communication carrier or cable 48.
  • Each well tool 24,26 is configured electronically to wait in a standby or sleep state until addressed by a frequency shift keying (FSK) signal from the surface location.
  • FSK frequency shift keying
  • Also at the surface location and in the communication line 48 is a signal detector 46 which has an inductive coil coupling 50 to the communication line or cable 48.
  • the modulation and detection systems overcome these problems. Communication frequencies in the range of 600 and 1200 Hz are adequate for most data transmission purposes. By using a power frequency which is two octaves higher at 4.8 Hz, both the power and communication frequencies are able to operate without interference. As discussed above, a well tool system is dormant until addressed by a discrete FSK
  • the address signal which is unique for each well tool, is sent downhole by means of voltage modulation of the power frequency (as opposed to impressing it on the communication carrier in addition to the power frequency).
  • the advantage of this choice is that the power frequency is used as a carrier and demodulation automatically takes place in the well tool through the rectification necessary to generate DC power.
  • a full wave rectifier 52 is shown in the well tool 24. All that is required to separate the modulation frequencies from the power frequency is the judicious selection of die filter capacitor 54 so that the ripple frequency amplitude is significantly smaller than the modulation frequency.
  • a discrete address modulation frequency is input at the surface location by a CPU unit 56 which is programmed to superimpose an FSK communication signal on the voltage frequency.
  • a level detector 58 is designed to reject the smaller amplitude ripple in the rectified signal and to follow the larger amplitude modulation.
  • the full wave rectification also results in a ripple frequency that is double the power frequency. This means that the communication frequencies are now separated from the power ripple frequency by three octaves instead of two, resulting in easier separation.
  • the tool In the well tool 24, once the tool is addressed and awake, it provides an output of data.
  • the data output is obtained in an established manner by using a current modulation means 60 to modulate the power current drawn in the communication carrier cable as a function of the data signal.
  • the coupler 50 senses the power current and a signal representative of the current drawn by the line is full wave rectified by a rectifier 64 at the surface location.
  • the modulation is then separated from the ripple frequency by a multi-stage active digital filter 66 because its level is too low to use the discrimination technique employed downhole. Again, this task is easier because of the frequency doubling effect on the ripple frequency.
  • the signal is processed in a CPU 68 and supplied to a recorder means 70.
  • the communication frequencies are always used to modulate the power frequency. In the case of communication downhole from the surface, this is done by amplitude modulating the power frequency voltage level. A similar thing happens when data is sent up- hole from the well tool, since the well tool does this by modulating the current it draws. This automatically amplitude modulates the power frequency current supplied from the surface so that this signal can be demodulated in the same manner as the voltage signal from the surface.
  • the carrier (power frequency) is effectively removed by rectification and the communication signal is recovered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Geophysics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Remote Sensing (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

L'invention se rapporte à un système de communication entre des sites éloignés reliés par un conducteur filaire commun, l'un de ces sites alimentant en courant alternatif un ou plusieurs sites éloignés (32, 34). Au niveau de ces sites éloignés, des composants de type bobines d'induction (28, 32 et 30, 34) assurent l'alimentation en énergie d'un instrument (24, 26). Le courant alternatif est modulé par des fréquences discrètes (56) sélectionnées au niveau du site de surface de manière à faire fonctionner un site éloigné sélectionné et spécifique. Au niveau de ce site éloigné sélectionné (24), le courant alternatif est rectifié et un processeur logique détecte les fréquences discrètes associées à ce site et active l'instrument. Les données en provenance de l'instrument sont transformées par modulation du courant (60) qui est démodulé au niveau dudit site (50, 64, 66, 68, 70).
PCT/US1999/000124 1998-01-13 1999-01-05 Systeme electronique numerique a couplage inductif fonctionnant en fond de puits WO1999036802A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7111698P 1998-01-13 1998-01-13
US60/071,116 1998-01-13

Publications (1)

Publication Number Publication Date
WO1999036802A1 true WO1999036802A1 (fr) 1999-07-22

Family

ID=22099340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000124 WO1999036802A1 (fr) 1998-01-13 1999-01-05 Systeme electronique numerique a couplage inductif fonctionnant en fond de puits

Country Status (1)

Country Link
WO (1) WO1999036802A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001082584A3 (fr) * 2000-04-24 2003-01-23 Broadcom Corp Systeme et procede de transmission de courant sur un reseau de lignes telephoniques domestiques
WO2004038950A3 (fr) * 2002-10-23 2004-09-23 Schlumberger Holdings Procede et appareil de signalisation
US6856255B2 (en) 2002-01-18 2005-02-15 Schlumberger Technology Corporation Electromagnetic power and communication link particularly adapted for drill collar mounted sensor systems
FR2871967A1 (fr) * 2004-06-18 2005-12-23 Valeo Electronique Sys Liaison Module d'echange d'informations par courants porteurs et procede de gestion du fonctionnement de ce module
GB2416626A (en) * 2004-07-27 2006-02-01 Baker Hughes Inc Inductive coupler arrangement
CN103728658A (zh) * 2012-10-12 2014-04-16 瑟塞尔公司 容许供电和/或数据传输线故障的地震勘探的地震电缆
WO2019132859A1 (fr) * 2017-12-26 2019-07-04 Halliburton Energy Services, Inc. Polarité alternée d'antennes côté boîtier dans un puits de forage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173754A (en) * 1977-03-17 1979-11-06 General Electric Company Distributed control system
US4227405A (en) * 1979-04-06 1980-10-14 Century Geophysical Corporation Digital mineral logging system
US4459760A (en) * 1982-02-24 1984-07-17 Applied Technologies Associates Apparatus and method to communicate information in a borehole
US4556866A (en) * 1983-03-16 1985-12-03 Honeywell Inc. Power line carrier FSK data system
US4577333A (en) * 1984-09-13 1986-03-18 Gridcomm Inc. Composite shift keying communication system
US4742475A (en) * 1984-06-19 1988-05-03 Ibg International, Inc. Environmental control system
US5452344A (en) * 1992-05-29 1995-09-19 Datran Systems Corporation Communication over power lines
US5491468A (en) * 1993-06-24 1996-02-13 Westinghouse Electric Corporation Identification system and method with passive tag

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173754A (en) * 1977-03-17 1979-11-06 General Electric Company Distributed control system
US4227405A (en) * 1979-04-06 1980-10-14 Century Geophysical Corporation Digital mineral logging system
US4459760A (en) * 1982-02-24 1984-07-17 Applied Technologies Associates Apparatus and method to communicate information in a borehole
US4556866A (en) * 1983-03-16 1985-12-03 Honeywell Inc. Power line carrier FSK data system
US4742475A (en) * 1984-06-19 1988-05-03 Ibg International, Inc. Environmental control system
US4577333A (en) * 1984-09-13 1986-03-18 Gridcomm Inc. Composite shift keying communication system
US5452344A (en) * 1992-05-29 1995-09-19 Datran Systems Corporation Communication over power lines
US5491468A (en) * 1993-06-24 1996-02-13 Westinghouse Electric Corporation Identification system and method with passive tag

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6862353B2 (en) 2000-04-24 2005-03-01 Broadcom Corporation System and method for providing power over a home phone line network
US7046796B2 (en) 2000-04-24 2006-05-16 Broadcom Corporation System and method for providing power over a home phone line network
WO2001082584A3 (fr) * 2000-04-24 2003-01-23 Broadcom Corp Systeme et procede de transmission de courant sur un reseau de lignes telephoniques domestiques
US6856255B2 (en) 2002-01-18 2005-02-15 Schlumberger Technology Corporation Electromagnetic power and communication link particularly adapted for drill collar mounted sensor systems
US7445042B2 (en) * 2002-10-23 2008-11-04 Schlumberger Technology Corporation Signalling method and apparatus
WO2004038950A3 (fr) * 2002-10-23 2004-09-23 Schlumberger Holdings Procede et appareil de signalisation
FR2871967A1 (fr) * 2004-06-18 2005-12-23 Valeo Electronique Sys Liaison Module d'echange d'informations par courants porteurs et procede de gestion du fonctionnement de ce module
WO2006008363A1 (fr) * 2004-06-18 2006-01-26 Valeo Electronique Et Systemes De Liaison Module d'echange d'informations par courants porteurs et procede de gestion du fonctionnement de ce module
US7945296B2 (en) 2004-06-18 2011-05-17 Valeo Electronique Et Systems De Liaison Module for exchanging information by carrier-currents comprising activated and deactivated states
GB2416626B (en) * 2004-07-27 2007-08-08 Baker Hughes Inc Armored flat cable signalling and instrument power acquisition
GB2416626A (en) * 2004-07-27 2006-02-01 Baker Hughes Inc Inductive coupler arrangement
CN103728658A (zh) * 2012-10-12 2014-04-16 瑟塞尔公司 容许供电和/或数据传输线故障的地震勘探的地震电缆
US20140104981A1 (en) * 2012-10-12 2014-04-17 Sercel Seismic cable for seismic prospection tolerant to failure on power supplying and/or data transmission lines
US9383467B2 (en) * 2012-10-12 2016-07-05 Sercel Seismic cable for seismic prospection tolerant to failure on power supplying and/or data transmission lines
WO2019132859A1 (fr) * 2017-12-26 2019-07-04 Halliburton Energy Services, Inc. Polarité alternée d'antennes côté boîtier dans un puits de forage
GB2581908A (en) * 2017-12-26 2020-09-02 Halliburton Energy Services Inc Alternating polarity of casing-side antennas in a wellbore
US10808525B2 (en) 2017-12-26 2020-10-20 Halliburton Energy Services, Inc. Alternating polarity of casing-side antennas in a wellbore
GB2581908B (en) * 2017-12-26 2022-04-06 Halliburton Energy Services Inc Alternating polarity of casing-side antennas in a wellbore

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