GB1491810A - Method and apparatus for transmitting downhole information from a well - Google Patents

Method and apparatus for transmitting downhole information from a well

Info

Publication number
GB1491810A
GB1491810A GB7612/75A GB761275A GB1491810A GB 1491810 A GB1491810 A GB 1491810A GB 7612/75 A GB7612/75 A GB 7612/75A GB 761275 A GB761275 A GB 761275A GB 1491810 A GB1491810 A GB 1491810A
Authority
GB
United Kingdom
Prior art keywords
signal
information
rotor
transmitted
well
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.)
Expired
Application number
GB7612/75A
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.)
ExxonMobil Oil Corp
Original Assignee
Mobil Oil Corp
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 Mobil Oil Corp filed Critical Mobil Oil Corp
Priority to GB7612/75A priority Critical patent/GB1491810A/en
Publication of GB1491810A publication Critical patent/GB1491810A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21B47/20—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 by modulation of mud waves, e.g. by continuous modulation
    • 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
    • E21B47/24—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 by positive mud pulses using a flow restricting valve within the drill pipe

Landscapes

  • 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)
  • Earth Drilling (AREA)

Abstract

1491810 Signalling by sound waves MOBIL OIL CORP 24 Feb 1975 7612/75 Heading G4F In transmitting information from downhole in a well through liquid therein an acoustic signal of constant frequency (e.g. 15 Hz) and phase is generated downhole and the signal is altered by the information to be transmitted to shift its phase (e.g. by -180 degrees) in a time period which produces, when the signal is synchronously rectified, a time for the phase shift effectively equal to zero; the latter condition is met with a time period equal to one normal period of the acoustic signal. Information may be transmitted as a digital word, with signal phase shift being effected in response to designated bits of the word; and information may be transmitted whilst the well is being drilled. In an embodiment housing 11, Fig. 1, within drill collar 12, has a mud turbine 13 which drives an electric generator 14, electricity from which is supplied through control unit 15 to motor 16; the latter drives rotor 17 of a signal generator, valve 18, through drive train 20. Slots 17a of rotor 17 in combination with slots 19a of stator 19 effect repetitive opening and closing of valve 18 to cause an acoustic signal to be generated in the drilling mud. A transducer 22, e.g. a strain gauge, is applied to control unit 15, Fig. 2 (not shown), which includes a digital word generator. Several transducer outputs may be multiplexed. Drive train 20 includes sun and planetary gears &c. whereby a digital "1" information bit causes temporary change of the speed of rotor 17 in accordance with the invention, Fig. 3 to 5 (none shown).
GB7612/75A 1975-02-24 1975-02-24 Method and apparatus for transmitting downhole information from a well Expired GB1491810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7612/75A GB1491810A (en) 1975-02-24 1975-02-24 Method and apparatus for transmitting downhole information from a well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7612/75A GB1491810A (en) 1975-02-24 1975-02-24 Method and apparatus for transmitting downhole information from a well

Publications (1)

Publication Number Publication Date
GB1491810A true GB1491810A (en) 1977-11-16

Family

ID=9836470

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7612/75A Expired GB1491810A (en) 1975-02-24 1975-02-24 Method and apparatus for transmitting downhole information from a well

Country Status (1)

Country Link
GB (1) GB1491810A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261308A (en) * 1991-11-06 1993-05-12 Marconi Gec Ltd Data transmission
WO2013048374A1 (en) 2011-09-27 2013-04-04 Halliburton Energy Services, Inc. Mud powered inertia drive oscillating pulser

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261308A (en) * 1991-11-06 1993-05-12 Marconi Gec Ltd Data transmission
GB2261308B (en) * 1991-11-06 1996-02-28 Marconi Gec Ltd Data transmission
WO2013048374A1 (en) 2011-09-27 2013-04-04 Halliburton Energy Services, Inc. Mud powered inertia drive oscillating pulser
CN103827695A (en) * 2011-09-27 2014-05-28 哈利伯顿能源服务公司 Mud powered inertia drive oscillating pulser
EP2745147A1 (en) * 2011-09-27 2014-06-25 Halliburton Energy Services, Inc. Mud powered inertia drive oscillating pulser
EP2745147A4 (en) * 2011-09-27 2016-01-13 Halliburton Energy Services Inc Mud powered inertia drive oscillating pulser

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930224