DE3325962A1 - Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb - Google Patents

Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb

Info

Publication number
DE3325962A1
DE3325962A1 DE19833325962 DE3325962A DE3325962A1 DE 3325962 A1 DE3325962 A1 DE 3325962A1 DE 19833325962 DE19833325962 DE 19833325962 DE 3325962 A DE3325962 A DE 3325962A DE 3325962 A1 DE3325962 A1 DE 3325962A1
Authority
DE
Germany
Prior art keywords
piston
boring bar
target
spindle
bar according
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.)
Granted
Application number
DE19833325962
Other languages
German (de)
English (en)
Other versions
DE3325962C2 (enExample
Inventor
Heinz Dipl.-Ing. 5804 Herdecke Wallussek
Martin Dipl.-Ing. 4320 Hattingen Wiebe
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.)
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
Original Assignee
Bergwerksverband GmbH
Schwing Hydraulik Elektronik GmbH and Co
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 Bergwerksverband GmbH, Schwing Hydraulik Elektronik GmbH and Co filed Critical Bergwerksverband GmbH
Priority to DE19833325962 priority Critical patent/DE3325962A1/de
Priority to DE8484107700T priority patent/DE3468478D1/de
Priority to EP84107700A priority patent/EP0134467B1/de
Priority to AT84107700T priority patent/ATE31778T1/de
Priority to BR8403588A priority patent/BR8403588A/pt
Priority to SU843764659A priority patent/SU1356969A3/ru
Priority to ZA845530A priority patent/ZA845530B/xx
Priority to US06/632,435 priority patent/US4596293A/en
Priority to CA000459298A priority patent/CA1222505A/en
Priority to JP59148708A priority patent/JPS6037394A/ja
Priority to AU30855/84A priority patent/AU567355B2/en
Publication of DE3325962A1 publication Critical patent/DE3325962A1/de
Application granted granted Critical
Publication of DE3325962C2 publication Critical patent/DE3325962C2/de
Granted 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/062—Deflecting the direction of boreholes the tool shaft rotating inside a non-rotating guide travelling with the shaft
    • 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
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
    • E21B44/005—Below-ground automatic control systems
    • 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
    • E21B47/02—Determining slope or direction
    • E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
    • 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
    • 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)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • Earth Drilling (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
DE19833325962 1983-07-19 1983-07-19 Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb Granted DE3325962A1 (de)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE19833325962 DE3325962A1 (de) 1983-07-19 1983-07-19 Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb
EP84107700A EP0134467B1 (de) 1983-07-19 1984-07-03 Zielbohrstange für drehendes Bohrgestänge mit Spülkanal für den Untertagebetrieb
AT84107700T ATE31778T1 (de) 1983-07-19 1984-07-03 Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb.
DE8484107700T DE3468478D1 (en) 1983-07-19 1984-07-03 Target-directed drilling rod for rotating boring tools with flushing duct for underground mining
SU843764659A SU1356969A3 (ru) 1983-07-19 1984-07-18 Бурова штанга направленного бурени дл вращающегос става бурильных труб с промывочным каналом преимущественно дл подземных работ
ZA845530A ZA845530B (en) 1983-07-19 1984-07-18 Guided drill rod for rotary drilling string comprising flushing passage for underground operation
BR8403588A BR8403588A (pt) 1983-07-19 1984-07-18 Barra de perfuracao dirigida para hastes de perfuracao rotativas com canal de lavagem,especialmente para operacao subterranea
US06/632,435 US4596293A (en) 1983-07-19 1984-07-19 Targetable drill with pressure telemetering of drill parameters
CA000459298A CA1222505A (en) 1983-07-19 1984-07-19 Targetable drill with pressure telemetering of drill parameters
JP59148708A JPS6037394A (ja) 1983-07-19 1984-07-19 照準穿孔棒
AU30855/84A AU567355B2 (en) 1983-07-19 1984-07-19 Pressure-pulse directional drilling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833325962 DE3325962A1 (de) 1983-07-19 1983-07-19 Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb

Publications (2)

Publication Number Publication Date
DE3325962A1 true DE3325962A1 (de) 1985-01-31
DE3325962C2 DE3325962C2 (enExample) 1987-06-11

Family

ID=6204331

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19833325962 Granted DE3325962A1 (de) 1983-07-19 1983-07-19 Zielbohrstange fuer drehendes bohrgestaenge mit spuelkanal fuer den untertagebetrieb
DE8484107700T Expired DE3468478D1 (en) 1983-07-19 1984-07-03 Target-directed drilling rod for rotating boring tools with flushing duct for underground mining

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE8484107700T Expired DE3468478D1 (en) 1983-07-19 1984-07-03 Target-directed drilling rod for rotating boring tools with flushing duct for underground mining

Country Status (10)

Country Link
US (1) US4596293A (enExample)
EP (1) EP0134467B1 (enExample)
JP (1) JPS6037394A (enExample)
AT (1) ATE31778T1 (enExample)
AU (1) AU567355B2 (enExample)
BR (1) BR8403588A (enExample)
CA (1) CA1222505A (enExample)
DE (2) DE3325962A1 (enExample)
SU (1) SU1356969A3 (enExample)
ZA (1) ZA845530B (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531226A1 (de) * 1985-08-31 1987-03-19 Schwing Hydraulik Elektronik Vorrichtung, insbesondere fuer den einsatz unter tage zur fernuebertragung von informationen aus einem bohrloch
WO1988010355A1 (fr) * 1987-06-16 1988-12-29 Preussag Aktiengesellschaft Dispositif pour guider un outil de forage ou un train de tiges
EP0486750A3 (en) * 1990-11-23 1992-10-28 Schwing Hydraulik Elektronik Gmbh & Co. Target-directed drilling rod
EP3714134A4 (en) * 2018-10-15 2021-08-04 Ozzie's Enterprises LLC DRILL HOLE MAPPING TOOL AND METHOD FOR MAPPING DRILL HOLES

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3863640D1 (de) * 1988-01-19 1991-08-14 Schwing Hydraulik Elektronik Selbststeuerndes gestaengerohr fuer rotierende bohrgestaenge von gesteinsbohrmaschinen.
US4928776A (en) * 1988-10-31 1990-05-29 Falgout Sr Thomas E Deviation control tool
FR2641387B1 (fr) * 1988-12-30 1991-05-31 Inst Francais Du Petrole Methode et dispositif de telecommande d'equipement de train de tiges par sequence d'information
US5220963A (en) * 1989-12-22 1993-06-22 Patton Consulting, Inc. System for controlled drilling of boreholes along planned profile
US5419405A (en) * 1989-12-22 1995-05-30 Patton Consulting System for controlled drilling of boreholes along planned profile
US5103919A (en) * 1990-10-04 1992-04-14 Amoco Corporation Method of determining the rotational orientation of a downhole tool
US5259468A (en) * 1990-10-04 1993-11-09 Amoco Corporation Method of dynamically monitoring the orientation of a curved drilling assembly and apparatus
DE4037259A1 (de) * 1990-11-23 1992-05-27 Schwing Hydraulik Elektronik Zielbohrstange mit eigener elektrischer energieversorgung durch einen eingebauten generator
AU1208692A (en) * 1991-01-31 1992-09-07 Bob J. Patton System for controlled drilling of boreholes along planned profile
US5139094A (en) * 1991-02-01 1992-08-18 Anadrill, Inc. Directional drilling methods and apparatus
WO1993012319A1 (en) * 1991-12-09 1993-06-24 Patton Bob J System for controlled drilling of boreholes along planned profile
EP1632644B1 (en) * 1995-02-16 2011-05-25 Baker Hughes Incorporated Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations
US6230822B1 (en) 1995-02-16 2001-05-15 Baker Hughes Incorporated Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
AUPO062296A0 (en) * 1996-06-25 1996-07-18 Gray, Ian A system for directional control of drilling
US5810088A (en) * 1997-03-26 1998-09-22 Baker Hughes, Inc. Electrically actuated disconnect apparatus and method
AU1097999A (en) * 1997-10-16 1999-05-03 Prime Directional Systems, Llc Oil tool
US6050349A (en) * 1997-10-16 2000-04-18 Prime Directional Systems, Llc Hydraulic system for mud pulse generation
GB9810321D0 (en) * 1998-05-15 1998-07-15 Head Philip Method of downhole drilling and apparatus therefore
EP0999347A1 (en) * 1998-11-02 2000-05-10 Halliburton Energy Services, Inc. Acoustic impulse gun
US6555926B2 (en) * 2001-09-28 2003-04-29 Baker Hughes Incorporated Pulser
US6845826B1 (en) 2003-02-14 2005-01-25 Noble Drilling Services Inc. Saver sub for a steering tool
US6857484B1 (en) 2003-02-14 2005-02-22 Noble Drilling Services Inc. Steering tool power generating system and method
GB0305617D0 (en) * 2003-03-12 2003-04-16 Target Well Control Ltd Determination of Device Orientation
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7571780B2 (en) 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US9127521B2 (en) * 2009-02-24 2015-09-08 Schlumberger Technology Corporation Downhole tool actuation having a seat with a fluid by-pass
US8371400B2 (en) * 2009-02-24 2013-02-12 Schlumberger Technology Corporation Downhole tool actuation
US7650951B1 (en) * 2009-04-16 2010-01-26 Hall David R Resettable actuator for downhole tool
US8028433B1 (en) * 2010-10-14 2011-10-04 Holland Carl A Method and device for measuring the inclination of a roadway
US9217290B2 (en) 2012-01-23 2015-12-22 Transocean Sedco Forex Ventures Limited High definition drilling rate of penetration for marine drilling
SG11201404274TA (en) * 2012-01-23 2014-08-28 Transocean Sedco Forex Ventures Ltd High definition drilling rate of penetration for marine drilling
CA2887530C (en) 2012-10-12 2020-03-24 Scientific Drilling International, Inc. Attitude reference for tieback/overlap processing
GB2518383A (en) * 2013-09-19 2015-03-25 Mincon Internat Ltd Drill rod for percussion drill tool
CN113027417B (zh) * 2021-03-04 2024-02-27 长江水利委员会长江科学院 一种适用于深水位钻孔地应力测试的保水泄压装置及方法
CN114673487A (zh) * 2022-03-03 2022-06-28 北京六合伟业科技股份有限公司 一种高温直井测斜仪

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941102A1 (de) * 1979-10-08 1981-04-16 Dresser Industries, Inc., 75221 Dallas, Tex. In einem bohrstrang zu verwendendes arbeitsgeraet zur erfassung und uebertragung von bohrloch-messdaten
DE3000239A1 (de) * 1980-01-05 1981-07-16 Bergwerksverband Gmbh, 4300 Essen Einrichtung zur herstellung zielgerichteter bohrungen
DE3046122A1 (de) * 1980-12-06 1982-06-16 Bergwerksverband Gmbh, 4300 Essen Einrichtung zur herstellung zielgerichteter bohrungen

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487681A (en) * 1965-01-14 1970-01-06 Dresser Ind Method and apparatus for resolving well logs
GB1388713A (en) * 1972-03-24 1975-03-26 Russell M K Directional drilling of boreholes
US3788136A (en) * 1972-08-11 1974-01-29 Texaco Inc Method and apparatuses for transmission of data from the bottom of a drill string during drilling of a well
US3805606A (en) * 1972-08-11 1974-04-23 Texaco Inc Method and apparatus for transmission of data from drill bit in wellbore while drilling
US3820389A (en) * 1972-09-20 1974-06-28 Texaco Inc Method and apparatuses for transmission of data from drill bit in well while drilling
US3813656A (en) * 1972-09-29 1974-05-28 Texaco Inc Methods and apparatuses for transmission of longitudinal and torque pulse data from drill string in well while drilling
US4351037A (en) * 1977-12-05 1982-09-21 Scherbatskoy Serge Alexander Systems, apparatus and methods for measuring while drilling
US4386422A (en) * 1980-09-25 1983-05-31 Exploration Logging, Inc. Servo valve for well-logging telemetry
US4513403A (en) * 1982-08-04 1985-04-23 Exploration Logging, Inc. Data encoding and synchronization for pulse telemetry

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941102A1 (de) * 1979-10-08 1981-04-16 Dresser Industries, Inc., 75221 Dallas, Tex. In einem bohrstrang zu verwendendes arbeitsgeraet zur erfassung und uebertragung von bohrloch-messdaten
DE3000239A1 (de) * 1980-01-05 1981-07-16 Bergwerksverband Gmbh, 4300 Essen Einrichtung zur herstellung zielgerichteter bohrungen
DE3046122A1 (de) * 1980-12-06 1982-06-16 Bergwerksverband Gmbh, 4300 Essen Einrichtung zur herstellung zielgerichteter bohrungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3531226A1 (de) * 1985-08-31 1987-03-19 Schwing Hydraulik Elektronik Vorrichtung, insbesondere fuer den einsatz unter tage zur fernuebertragung von informationen aus einem bohrloch
WO1988010355A1 (fr) * 1987-06-16 1988-12-29 Preussag Aktiengesellschaft Dispositif pour guider un outil de forage ou un train de tiges
US4947944A (en) * 1987-06-16 1990-08-14 Preussag Aktiengesellschaft Device for steering a drilling tool and/or drill string
EP0486750A3 (en) * 1990-11-23 1992-10-28 Schwing Hydraulik Elektronik Gmbh & Co. Target-directed drilling rod
EP3714134A4 (en) * 2018-10-15 2021-08-04 Ozzie's Enterprises LLC DRILL HOLE MAPPING TOOL AND METHOD FOR MAPPING DRILL HOLES
AU2018445403B2 (en) * 2018-10-15 2021-12-02 Ozzie's Enterprises LLC Borehole mapping tool and methods of mapping boreholes

Also Published As

Publication number Publication date
AU3085584A (en) 1985-01-24
SU1356969A3 (ru) 1987-11-30
ATE31778T1 (de) 1988-01-15
ZA845530B (en) 1985-03-27
DE3325962C2 (enExample) 1987-06-11
JPS6037394A (ja) 1985-02-26
EP0134467A3 (en) 1985-07-03
EP0134467B1 (de) 1988-01-07
CA1222505A (en) 1987-06-02
BR8403588A (pt) 1985-06-25
AU567355B2 (en) 1987-11-19
JPH0314993B2 (enExample) 1991-02-28
DE3468478D1 (en) 1988-02-11
US4596293A (en) 1986-06-24
EP0134467A2 (de) 1985-03-20

Similar Documents

Publication Publication Date Title
EP0134467B1 (de) Zielbohrstange für drehendes Bohrgestänge mit Spülkanal für den Untertagebetrieb
DE4291022B4 (de) Kurzstreckenübertragungsverbindung für ein Tiefen-MWD-System
DE60304320T2 (de) Energieerzeuger betrieben durch doppelwandige rohrverbindung
DE3046122C2 (de) Einrichtungen zur Herstellung zielgerichteter Bohrungen mit einer Zielbohrstange
DE3513178C2 (de) Vorrichtung zur Datenübertragung längs eines Bohrlochgestängestranges
DE3789145T2 (de) Einrichtung zur Datenübertragung in einem Bohrloch mit einem magnetischen Bohrgestänge.
DE69717875T2 (de) Verfahren und Vorrichtung zum Richtbohren mit gewickeltem Rohrstrang
EP0601030B1 (de) Vermessungsverfahren für seilkernbohrungen und vorrichtung zur durchführung
DE102007020662B4 (de) Induktives Kopplungssystem
DE69211229T2 (de) Rotationsbohrsystem für richtungsgesteuerte Bohrungen
DE60207559T2 (de) Richtbohrwerkzeug
DE3428931C1 (de) Vorrichtung zur Fernuebertragung von Informationen aus einem Bohrloch zur Erdoberflaeche waehrend des Betriebs eines Bohrgeraetes
DE69431354T2 (de) Verfahren und vorrichtung zur überwachung des bohrkopfes einer rohr- oder kernbohrvorrichtung
DE2233324C3 (de) Vorrichtung zur Bohrlochmessung während der Bohrung
EP3414418B1 (de) Richtbohrgerät und verfahren zum kalibrieren desselben
DE3912614A1 (de) Elektrisches uebertragungssystem fuer ein mit bohrspuelmittel gefuelltes bohrloch
DE1458631B2 (de) Vorrichtung zum uebertragen von bohrlochmessungen mittels kontinuierlicher schallwellen
DE2941104A1 (de) Verfahren und vorrichtung zum untersuchen von erdbohrloechern
DE69530666T9 (de) Schutzschild für eine Antenne, Verschleissband und Stabilisator für ein Werkzeug zum Messen während des Bohrens
DE4017761A1 (de) Bohrwerkzeug zum abteufen von bohrungen in unterirdische gesteinsformationen
DE3132820A1 (de) Vorrichtung zur signalgebung innerhalb eines bohrloches waehrend des bohrvorganges
DD239632A5 (de) Verfahren zur azimutmessung bei einer schraegbohrung
DE3400834C1 (de) Messgeraet zur Bestimmung des Profils von Gesteinsbohrloechern
DE2161353A1 (de) Hydraulisch betriebene Vorrichtung zur Übertragung von Schachtsohlen-Meßsignalen an die Oberflächen-Station
DE112021002475T5 (de) Elektromagnetisches bohrlochmessgerät

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee