IE45473L - Effective downhole measurements in a well during drilling - Google Patents

Effective downhole measurements in a well during drilling

Info

Publication number
IE45473L
IE45473L IE771801A IE180177A IE45473L IE 45473 L IE45473 L IE 45473L IE 771801 A IE771801 A IE 771801A IE 180177 A IE180177 A IE 180177A IE 45473 L IE45473 L IE 45473L
Authority
IE
Ireland
Prior art keywords
speed
variation
digital signals
acoustic signal
during drilling
Prior art date
Application number
IE771801A
Other versions
IE45473B1 (en
Original Assignee
Schlumberger Technology 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
Priority claimed from US05/727,686 external-priority patent/US4100528A/en
Priority claimed from US05/727,687 external-priority patent/US4103281A/en
Application filed by Schlumberger Technology Corp filed Critical Schlumberger Technology Corp
Publication of IE45473L publication Critical patent/IE45473L/en
Publication of IE45473B1 publication Critical patent/IE45473B1/en

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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Electric Motors In General (AREA)
  • Earth Drilling (AREA)
  • Communication Cables (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

Measuring method during the drilling for momentarily to vary the speed of an acoustic signal generator driven by a motor, with respect to its normal speed constant, in order to introduce an appropriate shift in said acoustic signal. The method consists in producing two digital signals in response to said variation in speed of the generator, the difference between said digital signals being representative of the phase shift of the acoustic signal which is caused by the variation in speed of the motor , and stopping said variation in speed of the generator, with respect to its normal speed, when the difference between said digital signals reaches a predetermined value representative of a predetermined phase shift. [FR2366586A1]
IE1801/77A 1976-09-29 1977-08-30 A digital motor control method and apparatus for measuring-while-drilling IE45473B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US72768576A 1976-09-29 1976-09-29
US05/727,686 US4100528A (en) 1976-09-29 1976-09-29 Measuring-while-drilling method and system having a digital motor control
US05/727,687 US4103281A (en) 1976-09-29 1976-09-29 Measuring-while-drilling system having motor speed detection during encoding

Publications (2)

Publication Number Publication Date
IE45473L true IE45473L (en) 1978-03-29
IE45473B1 IE45473B1 (en) 1982-09-08

Family

ID=27419101

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1801/77A IE45473B1 (en) 1976-09-29 1977-08-30 A digital motor control method and apparatus for measuring-while-drilling

Country Status (12)

Country Link
BR (1) BR7706432A (en)
DE (1) DE2743871A1 (en)
DK (1) DK432177A (en)
EG (1) EG13641A (en)
ES (2) ES462412A1 (en)
FR (1) FR2366586A1 (en)
GB (3) GB1592993A (en)
IE (1) IE45473B1 (en)
MX (1) MX143691A (en)
NL (1) NL7710508A (en)
NO (1) NO150059C (en)
OA (1) OA05771A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3035905C2 (en) * 1980-09-24 1982-12-30 Christensen, Inc., 84115 Salt Lake City, Utah Device for the remote transmission of information from a borehole to the surface of the earth during the operation of a drilling rig
US5283768A (en) * 1991-06-14 1994-02-01 Baker Hughes Incorporated Borehole liquid acoustic wave transducer
GB2261308B (en) * 1991-11-06 1996-02-28 Marconi Gec Ltd Data transmission
CN115977592B (en) * 2023-03-01 2024-05-17 电子科技大学 Speed-frequency self-adaptive clock applied to wireless perforation system

Also Published As

Publication number Publication date
GB1592993A (en) 1981-07-15
FR2366586B1 (en) 1982-09-10
ES471490A1 (en) 1979-02-01
NO150059B (en) 1984-04-30
GB1592995A (en) 1981-07-15
ES462412A1 (en) 1979-06-16
NO150059C (en) 1984-08-08
BR7706432A (en) 1978-07-04
DE2743871A1 (en) 1978-03-30
GB1592994A (en) 1981-07-15
FR2366586A1 (en) 1978-04-28
MX143691A (en) 1981-06-24
DK432177A (en) 1978-03-30
OA05771A (en) 1981-05-31
EG13641A (en) 1982-03-31
NO772988L (en) 1978-03-30
NL7710508A (en) 1978-03-31
IE45473B1 (en) 1982-09-08

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