US3713500A - Drilling devices - Google Patents

Drilling devices Download PDF

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Publication number
US3713500A
US3713500A US00026538A US3713500DA US3713500A US 3713500 A US3713500 A US 3713500A US 00026538 A US00026538 A US 00026538A US 3713500D A US3713500D A US 3713500DA US 3713500 A US3713500 A US 3713500A
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US
United States
Prior art keywords
drilling
servo
drill pipe
control
angle
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 - Lifetime
Application number
US00026538A
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English (en)
Inventor
M Russell
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.)
CHELTENHAM ATTITUDE SYSTEMS Ltd
Baroid Technology Inc
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Individual
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Publication of US3713500A publication Critical patent/US3713500A/en
Assigned to RUSSELL ATTITUDE SYSTEMS LIMITED, UNIT 3, E. CAMP, STAVERTON AIRPORT INDUSTRIAL ESTATE, CHELTENHAM, GLOUCESTERSHIRE reassignment RUSSELL ATTITUDE SYSTEMS LIMITED, UNIT 3, E. CAMP, STAVERTON AIRPORT INDUSTRIAL ESTATE, CHELTENHAM, GLOUCESTERSHIRE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CHELTENHAM ATTITUDE SYSTEMS LIMITED
Assigned to CHELTENHAM ATTITUDE SYSTEMS LIMITED reassignment CHELTENHAM ATTITUDE SYSTEMS LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE 3-16-67 Assignors: RUSSELL ATTITUDE SYSTEMS LIMITED
Assigned to SPERRY SUN INC. 10707 CORPORATED DRIVE STAFFORD TX reassignment SPERRY SUN INC. 10707 CORPORATED DRIVE STAFFORD TX ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RUSSELL ATTITUDE SYSTEMS LIMITED
Assigned to SPERRY-SUN DRILLING SERVICES, INC. reassignment SPERRY-SUN DRILLING SERVICES, INC. CHANGE OF NAME (SEE RECORD FOR DETAILS) EFFECTIVE 10-19-81 , DELAWARE Assignors: NL SPERRY - SUN, INC.
Assigned to BAROID TECHNOLOGY, INC., 3000 NORTH SAM HOUSTON PARKWAY EAST A CORP. OF DE reassignment BAROID TECHNOLOGY, INC., 3000 NORTH SAM HOUSTON PARKWAY EAST A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPERRY-SUN DRILLING SERVICES, INC.
Assigned to SPERRY-SUN, INC. reassignment SPERRY-SUN, INC. CERTIFICATE OF INCORPORATION TO RESTATE INCORPORATION, EFFECTIVE JULY 21, 1976 Assignors: SPERRY-SUN WELL SURVEYING COMPANY
Assigned to CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE reassignment CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), THE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAROID CORPORATION, A CORP. OF DE.
Assigned to SPERRY-SUN, INC., A CORP. OF DE. reassignment SPERRY-SUN, INC., A CORP. OF DE. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SPERRY-SUN WELL SURVEYING COMPANY
Assigned to BAROID TECHNOLOGY, INC., A CORP. OF DE. reassignment BAROID TECHNOLOGY, INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPERRY-SUN DRILLING SERVICES, INC., A CORP. OF DE.
Assigned to SPERRY-SUN DRILLING SERVICES, INC. reassignment SPERRY-SUN DRILLING SERVICES, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). APRIL 24, 1981, JUNE 24, 1981 AND NOVEMBER 23, 1988 RESPECTIVELY Assignors: NL ACQUISTION CORPORATION, (CHANGED TO), NL SPERRY-SUN, INC., (CHANGED TO), SPERRY-SUN, INC., (CHANGED TO )
Anticipated expiration legal-status Critical
Assigned to BAROID CORPORATION reassignment BAROID CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CHASE MANHATTAN BANK, THE
Expired - Lifetime legal-status Critical Current

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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
    • E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
    • 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
    • E21B47/024—Determining slope or direction of devices in the borehole
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback

Definitions

  • Cl ..l75/73, 175/94 drilling comprise servo means f changing the im [51] hit. Cl. ..E2lb 7/04 angle and further Servo means f turning the Comm] [581 Field Of Search ..l75/73, 45, 26, 94 means with respect to the drill pipe axis in order to 5 reorientate the device without changing the drilling 6] References C'ted angle.
  • the control means also comprise means for UNITED STATES PATENTS programming and/or controlling both servomeans by signals set in, or transmitted from, above ground. 3,589,454 6/197l Coyne ..l75/45 3,326,008 6/1967 Baran et al.
  • This invention relates to control means for drilling devices of the type used, for example, in the directional drilling of oil wells with a drill bit mounted at the lower end of a drill pipe or string and rotatable about an axis inclined to the longitudinal axis of the lower end of the pipe.
  • Such drilling devices at present in use have a fixed inclination (hereinafter referred to as the drilling angle) with respect to the drill pipe axis and the complete device is in use rigidly fixed at the lower end of the pipe.
  • the drilling angle a fixed inclination
  • the object of the invention is to provide a device with which this difficulty and waste of time are materially overcome.
  • control means for fitting at the lower end of a drill pipe adjacent drilling means to control directional drilling comprises servo means for changing the drilling angle (hereinafter referred to as angle servo means), further servo means for turning the control means or at least a portion thereof in use coupled to the drilling means with respect to the drill pipe axis in order to reorientate the device without changing the drilling angle (hereinafter referred to as orientating servo means), and means for programming and/or controlling the servo means by signals from above ground.
  • angle servo means for changing the drilling angle
  • orientating servo means for turning the control means or at least a portion thereof in use coupled to the drilling means with respect to the drill pipe axis in order to reorientate the device without changing the drilling angle
  • the control means may be directly attachable to driving means for the drill bit, which will normally comprise a so-called mud motor which obtains its power from the flow of drilling mud along the drill pipe.
  • driving means for the drill bit which will normally comprise a so-called mud motor which obtains its power from the flow of drilling mud along the drill pipe.
  • control means and drilling means may be manufactured as a unit, in which case the invention provides a drilling device including the driving means for the drill bit and the aforesaid control means.
  • the control means may include, or be adapted to attach to, a means of generating hydraulic power or electrical power, or both, to provide power for the servo means and associated circuitry.
  • a means of generating hydraulic power or electrical power, or both to provide power for the servo means and associated circuitry.
  • the electrical power generator or the hydraulic power generator or both are also driven by a separate mud motor.
  • the generator may be coupled to the mud motor which drives the drill bit.
  • control means incorporates electronic means for measuring the components of the earths magnetic and/or gravitational fields, providing outputs which combine these measurements in a certain manner as defined by fixed signal processing within the control means or by remote drilling instructions, or by a combination of both.
  • electronic means for measuring the components of the earths magnetic and/or gravitational fields, providing outputs which combine these measurements in a certain manner as defined by fixed signal processing within the control means or by remote drilling instructions, or by a combination of both.
  • Drilling instructions may be given to the control means either by manual presetting of electrical controls before the control and drilling means are lowered into the well, or alternatively remotely by means which provide a communication link between the surface and the control means and which are dropped down the drill pipe.
  • Such means are hereinafter referred to as a programme carrier," and the carrier may be settable to command specific servo angles or to provide on/off instructions, for example when the drilling angle is movable by the angle servo from zero to a predetermined limit of say 3 but is not adjustable to intermediate positions below that limit.
  • Means may be provided to ensure that when it reaches the drilling device the programme carrier locates accurately in the angular sense with respect to a programme receiver embodied in the device at the trailing end thereof.
  • the programme receiver identifies the specific command or commands set into the' carrier, and these commands may be defined by the angular positions of bar magnets ad justably mounted at the leading end of the carrier and the adjusted positions of which are sensed by flux gates or Hall effect devices in the receiver.
  • FIG. 1 is a diagram showing the device attached to a drill pipe and a drill bit
  • FIG. 2 is a diagram showing the method of alignment of a programme carrier of the device with respect to the drill pipe
  • FIG. 3 is a block diagram of orientating servo means of the device.
  • the device 1 comprises six sections disposed in line axially of the device and through which the drill mud passes, the trailing end of the device being rigidly attached to the bottom pipe section of the drill string 2.
  • the leading section in this embodiment comprises a mud motor 8 which drives the drill bit 7 and is disposed immediately adjacent angle servo means 3 operable to set the drilling angle to zero, or alternatively to a fixed value which is typically 2. As the drilling angle is not adjustable to any other value the servo is controlled in an on/off mode by programming means as will be described.
  • the angle servo means 3 are immediately followed by an electrical generator 4 driven by its own mud motor, and this is in turn followed by an electrical measuring device 5.
  • This device measures the components of the earths magnetic and gravitational fields and derives outputs to control a following orientating servo means 6, whereby the latter are maintained at the position commanded by programme inputs from the surface or by preset inputs.
  • the orientating servo 6 con trols orientation of the leading end of the device 1, and hence of the drill bit 7, with respect to the bottom end of the drill string 2.
  • the trailing end section of the device comprises a programme receiver 9. It receives programming commands from a programme carrier 11 which provides a communications link between the surface and the drill. Angle and on-off commands are set into the carrier 11 by the mechanical, positioning of magnets such as 10 (FIG. 2) at the leading end of the carrier which is then dropped down the drill string 2 and falls freely under gravity until it reaches the drilling device 1.
  • a mule- 'shoe 12 at the leading end of the carrier 1 l engages and locates with an inwardly projecting pin 13 in the bottom pipe section, whereby to orientate the program carrier 11 accurately with respect to the receiver 9.
  • the latter incorporates magnetic field sensing devices which identify angular components and on-off commands set into the programme carrier 11.
  • the angular component commands are used to control the orientation servo 6, while on-off commands are used to control the angle servo 3 and also may be used to ensure that the programme carrier 11 has located in the carrier position within the'drilling device 1.
  • the device may incorporate a mud bypass valve which is operated in the event of non-location of the programme carrier and which acts to bypass the main mud motor.
  • the device 1 provides a unit including the drilling motor 8 and the control means 3,4,5,6 and 9.
  • the control means may be manufactured and supplied as a separate unit adapted for attachment to the drilling means.
  • the electronic measuring device ensuring that the drill follows the command direction irrespective of torque wind-up in the drill string or any tendency of the drill bit to wander.
  • the fact that it is unnecessary to estimate the pipe wind-up angle is a very great advantage, as is the facility to adjust the drilling angle to zero without coming out of the hole.
  • Previous when changing from directional to straight drilling it has been necessary to withdraw the complete drill string and fit a new drilling device. In fact, with the present device it is only necessary to come out of the hole when it is necessary to change the drill bit.
  • the trailing end of the programme carrier 11 has a projection 14 which can be engaged by a grab shoe on a line dropped down the drill string, thus enabling the programme carrier to be withdrawn for command resetting. While it is withdrawn a measuring instrument can be dropped down which provides information as to the inclination and direction of drilling.
  • the orientating servo 6 of the present device uses the outputs from the sensing elements to rotate the drill with respect to the lower end of the drill pipe 2. Continuous orientation while drilling is achieved without the need for any type of transmission link to the surface.
  • a block diagram of the orientation servo 6 is shown in FIG. 3, to which reference will now be made.
  • This resolver may be either electro mechanical or electronic in its operation, but in either case it combines the input signals as follows:
  • the output is a function of el e2 and an angular input such that Output e1 sina e2 cosa
  • the resolver output is fed to a servo amplifier the output of which drives the orientating servo motor.
  • This motor drives through a reduction gearbox to,
  • the resolver input angle qb or mp may be either I preset before the drill is lowered into the well or may be set into the servo by means of the programme carrier.
  • OXYZ is rotated about axis OZ by an angle ill, which will be defined as the AZIMUTI-I ANGLE.
  • OXYZ is further rotated by a PITCH ANGLE 0 about the axis OY.
  • Equations (13) and (14) may then be rewritten. (cos 0 taken to be 1) ill, +BA a cos i11 1112 8A2 a Sin lb;
  • Control means for fitting at the lower end of a drill pipe adjacent drilling means to control the drilling angle and orientation of the drilling means for directional drilling comprising first servo means for changing the drilling angle, further servo means for orientating the first servo means with respect to the drill pipe axis without changing the drilling angle, and means for programming and/or controlling both servo means by signals set in, or transmitted from, above ground, said control means including means for generating power to provide power for the servo means.
  • Control means according'to claim 2, wherein means are provided to ensure that when the programme carrier reaches the control means it locates accurately in the angular sense with respect to the programme receiver in the control means.
  • Control means according to claim 2, wherein the programme receiver embodies at least one flux gate operative to sense the positional adjustment of the magnet.
  • a borehole drilling device comprising a substantially rigid drill pipe extending underground from adjacent the surface of the gro und drilling means at the lower end of the drill pipe, and control means at the lower end of the drill pipe adjacent said dr'll'ng means to control the drilling angle and orienta ii of the drilling means for directional drilling, said control means comprising first servo means for changing the drilling angle, further servo means for orienting the first servo means with respect to the drill pipe axis without changing the drilling angle, and means for controlling both servo means.
  • control means including means responsive to the earths magnetic and/or gravitational fields to control the drilling angle and orientation of the drilling means.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Automation & Control Theory (AREA)
  • General Physics & Mathematics (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US00026538A 1969-04-08 1970-04-08 Drilling devices Expired - Lifetime US3713500A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB07868/69A GB1268938A (en) 1969-04-08 1969-04-08 Improvements in or relating to control means for drilling devices
NL7202956A NL7202956A (xx) 1969-04-08 1972-03-06
DE2211734A DE2211734C3 (de) 1969-04-08 1972-03-10 Steuerung für Bohreinrichtungen
FR7209163A FR2175620B1 (xx) 1969-04-08 1972-03-16

Publications (1)

Publication Number Publication Date
US3713500A true US3713500A (en) 1973-01-30

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US00026538A Expired - Lifetime US3713500A (en) 1969-04-08 1970-04-08 Drilling devices

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US (1) US3713500A (xx)
DE (1) DE2211734C3 (xx)
FR (1) FR2175620B1 (xx)
GB (1) GB1268938A (xx)
NL (1) NL7202956A (xx)

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841420A (en) * 1972-03-24 1974-10-15 M Russell Directional drilling means
US3878903A (en) * 1973-12-04 1975-04-22 Martin Dee Cherrington Apparatus and process for drilling underground arcuate paths
US4003440A (en) * 1974-09-17 1977-01-18 Tidril Corporation Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner
US4020641A (en) * 1975-12-22 1977-05-03 Kabushiki Kaisha Komatsu Seisakusho Method of laying pipes in the ground
US4121673A (en) * 1976-11-10 1978-10-24 Martin Dee Cherrington Drilling and installation system
US4220214A (en) * 1977-08-18 1980-09-02 Benoit Lloyd F Directional drilling sub
US4221503A (en) * 1977-12-15 1980-09-09 Cherrington Martin D Drilling method and apparatus for large diameter pipe
US4299295A (en) * 1980-02-08 1981-11-10 Kerr-Mcgee Coal Corporation Process for degasification of subterranean mineral deposits
US4303135A (en) * 1977-08-18 1981-12-01 Benoit Lloyd F Directional drilling sub
US4361192A (en) * 1980-02-08 1982-11-30 Kerr-Mcgee Corporation Borehole survey method and apparatus for drilling substantially horizontal boreholes
EP0085444A2 (en) * 1982-02-02 1983-08-10 Shell Internationale Researchmaatschappij B.V. Method and means for controlling the course of a bore hole
EP0103913A2 (en) * 1982-08-25 1984-03-28 Shell Internationale Researchmaatschappij B.V. Down-hole motor and method for directional drilling of boreholes
EP0184304A1 (en) * 1984-11-07 1986-06-11 Mobil Oil Corporation Method and system of drilling deviated wellbores
FR2599423A1 (fr) * 1986-05-27 1987-12-04 Inst Francais Du Petrole Procede et dispositif permettant de guider un forage a travers des formations geologiques.
US4789032A (en) * 1987-09-25 1988-12-06 Rehm William A Orienting and circulating sub
WO1990005235A1 (en) * 1988-11-03 1990-05-17 James Bain Noble Directional drilling apparatus and method
USRE33751E (en) * 1985-10-11 1991-11-26 Smith International, Inc. System and method for controlled directional drilling
US5220963A (en) * 1989-12-22 1993-06-22 Patton Consulting, Inc. System for controlled drilling of boreholes along planned profile
WO1993012318A1 (en) * 1991-12-09 1993-06-24 Patton Bob J 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
EP0774563A3 (en) * 1995-11-17 1998-04-15 Baker Hughes Incorporated Method and apparatus for navigational drilling
US6296066B1 (en) * 1997-10-27 2001-10-02 Halliburton Energy Services, Inc. Well system
US6598687B2 (en) 1997-10-27 2003-07-29 Halliburton Energy Services, Inc. Three dimensional steerable system
WO2003067018A2 (en) * 2002-02-01 2003-08-14 Halliburton Energy Services, Inc. Well system
US6659200B1 (en) 1999-12-20 2003-12-09 Halliburton Energy Services, Inc. Actuator assembly and method for actuating downhole assembly
US20060157281A1 (en) * 2005-01-20 2006-07-20 Geoff Downton Bi-directional rotary steerable system actuator assembly and method
US20070181343A1 (en) * 2006-02-09 2007-08-09 Michael King Russell Directional drilling control
US20080128171A1 (en) * 2004-07-09 2008-06-05 Halliburton Energy Services, Inc. Closed Loop Control Bore Hole Drilling System
US20090057018A1 (en) * 2007-08-31 2009-03-05 Precision Energy Services, Inc. Directional drilling control using modulated bit rotation
US7510031B2 (en) 2006-07-11 2009-03-31 Russell Oil Exploration Limited Directional drilling control
US20090308659A1 (en) * 2008-06-17 2009-12-17 Smart Stabilizer Systems Limited Steering component, steering assembly and method of steering a drill bit in a borehole
US20100108383A1 (en) * 2008-11-03 2010-05-06 Halliburton Energy Services, Inc. Drilling Apparatus and Method
EP2202382A2 (en) 2008-12-29 2010-06-30 Precision Energy Services, Inc. Directional Drilling Control Using Periodic Perturbation of the Drill Bit
US9388635B2 (en) 2008-11-04 2016-07-12 Halliburton Energy Services, Inc. Method and apparatus for controlling an orientable connection in a drilling assembly
US9567844B2 (en) 2013-10-10 2017-02-14 Weatherford Technology Holdings, Llc Analysis of drillstring dynamics using angular and linear motion data from multiple accelerometer pairs
US10480304B2 (en) 2011-10-14 2019-11-19 Weatherford Technology Holdings, Llc Analysis of drillstring dynamics using an angular rate sensor
US11674388B1 (en) * 2017-01-17 2023-06-13 Hypersciences, Inc. System for generation of thermal energy

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281487A1 (fr) * 1974-08-09 1976-03-05 Chepelev Viktor Dispositif pour l'orientation d'un outil dans un trou de forage
FR2491989A2 (fr) * 1980-10-13 1982-04-16 Inst Francais Du Petrole Raccord coude a angle variable pour forages diriges
CH630700A5 (fr) * 1978-07-24 1982-06-30 Inst Francais Du Petrole Raccord coude a angle variable pour forages diriges.
FR2451063A1 (fr) * 1979-03-09 1980-10-03 Crouzet Sa Dispositif de determination de la direction d'une ligne de visee
DE2911419C2 (de) * 1979-03-23 1984-03-01 Wolfgang Dr.-Ing. 7500 Karlsruhe Ständer Vorrichtung zum richtungsgesteuerten Herstellen von Bohrlöchern in Lockergestein
BE905960A (nl) * 1986-12-17 1987-04-16 Hydro Soil Services N V Werkwijze voor het lichten van alle op de bodem van de zee, een rivier of een waterbekken rustende voorwerpen en hierbij gebruikte inrichting.
GB2280463B (en) * 1990-08-27 1995-04-19 Baroid Technology Inc Borehole drilling and telemetry
CA2024061C (en) * 1990-08-27 2001-10-02 Laurier Emile Comeau System for drilling deviated boreholes
EP0811745B1 (de) * 1996-06-07 2002-09-04 Baker Hughes Incorporated Steuergerät für ein Richtbohrwerkzeug
GB9903256D0 (en) 1999-02-12 1999-04-07 Halco Drilling International L Directional drilling apparatus
BR112018014131A2 (pt) 2016-01-13 2018-12-11 Slip Clutch Systems Ltd aparelho para prover controle direcional de equipamento de perfuração de furo, arranjo de equipamento de perfuração de furo, e, métodos para prover controle direcional a um arranjo de perfuração de furo e para operar um arranjo de perfuração de furo.

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841420A (en) * 1972-03-24 1974-10-15 M Russell Directional drilling means
US3878903A (en) * 1973-12-04 1975-04-22 Martin Dee Cherrington Apparatus and process for drilling underground arcuate paths
US4003440A (en) * 1974-09-17 1977-01-18 Tidril Corporation Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner
US4020641A (en) * 1975-12-22 1977-05-03 Kabushiki Kaisha Komatsu Seisakusho Method of laying pipes in the ground
US4121673A (en) * 1976-11-10 1978-10-24 Martin Dee Cherrington Drilling and installation system
US4220214A (en) * 1977-08-18 1980-09-02 Benoit Lloyd F Directional drilling sub
US4303135A (en) * 1977-08-18 1981-12-01 Benoit Lloyd F Directional drilling sub
US4221503A (en) * 1977-12-15 1980-09-09 Cherrington Martin D Drilling method and apparatus for large diameter pipe
US4299295A (en) * 1980-02-08 1981-11-10 Kerr-Mcgee Coal Corporation Process for degasification of subterranean mineral deposits
US4361192A (en) * 1980-02-08 1982-11-30 Kerr-Mcgee Corporation Borehole survey method and apparatus for drilling substantially horizontal boreholes
EP0085444A2 (en) * 1982-02-02 1983-08-10 Shell Internationale Researchmaatschappij B.V. Method and means for controlling the course of a bore hole
EP0085444A3 (en) * 1982-02-02 1983-10-19 Shell Internationale Research Maatschappij B.V. Method and means for controlling the course of a bore hole
EP0103913A2 (en) * 1982-08-25 1984-03-28 Shell Internationale Researchmaatschappij B.V. Down-hole motor and method for directional drilling of boreholes
EP0103913A3 (en) * 1982-08-25 1984-10-03 Shell Internationale Research Maatschappij B.V. Down-hole motor and method for directional drilling of boreholes
EP0184304A1 (en) * 1984-11-07 1986-06-11 Mobil Oil Corporation Method and system of drilling deviated wellbores
USRE33751E (en) * 1985-10-11 1991-11-26 Smith International, Inc. System and method for controlled directional drilling
FR2599423A1 (fr) * 1986-05-27 1987-12-04 Inst Francais Du Petrole Procede et dispositif permettant de guider un forage a travers des formations geologiques.
US4789032A (en) * 1987-09-25 1988-12-06 Rehm William A Orienting and circulating sub
WO1990005235A1 (en) * 1988-11-03 1990-05-17 James Bain Noble Directional drilling apparatus and method
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
US5439064A (en) * 1989-12-22 1995-08-08 Patton Consulting, Inc. System for controlled drilling of boreholes along planned profile
WO1993012318A1 (en) * 1991-12-09 1993-06-24 Patton Bob J System for controlled drilling of boreholes along planned profile
EP0774563A3 (en) * 1995-11-17 1998-04-15 Baker Hughes Incorporated Method and apparatus for navigational drilling
US6129160A (en) * 1995-11-17 2000-10-10 Baker Hughes Incorporated Torque compensation apparatus for bottomhole assembly
US20050115741A1 (en) * 1997-10-27 2005-06-02 Halliburton Energy Services, Inc. Well system
US6598687B2 (en) 1997-10-27 2003-07-29 Halliburton Energy Services, Inc. Three dimensional steerable system
US7195083B2 (en) 1997-10-27 2007-03-27 Halliburton Energy Services, Inc Three dimensional steering system and method for steering bit to drill borehole
US6607044B1 (en) 1997-10-27 2003-08-19 Halliburton Energy Services, Inc. Three dimensional steerable system and method for steering bit to drill borehole
US7172038B2 (en) 1997-10-27 2007-02-06 Halliburton Energy Services, Inc. Well system
US6923273B2 (en) 1997-10-27 2005-08-02 Halliburton Energy Services, Inc. Well system
US20050098350A1 (en) * 1997-10-27 2005-05-12 Halliburton Energy Services, Inc. Three dimensional steering system and method for steering bit to drill borehole
US6296066B1 (en) * 1997-10-27 2001-10-02 Halliburton Energy Services, Inc. Well system
US6659200B1 (en) 1999-12-20 2003-12-09 Halliburton Energy Services, Inc. Actuator assembly and method for actuating downhole assembly
WO2003067018A2 (en) * 2002-02-01 2003-08-14 Halliburton Energy Services, Inc. Well system
WO2003067018A3 (en) * 2002-02-01 2004-08-19 Halliburton Energy Serv Inc Well system
US8393413B2 (en) * 2004-07-09 2013-03-12 Halliburton Energy Services, Inc. Closed loop control bore hole drilling system
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NL7202956A (xx) 1973-09-10
DE2211734C3 (de) 1975-02-20
DE2211734B2 (de) 1974-06-27
GB1268938A (en) 1972-03-29
FR2175620B1 (xx) 1976-03-05
FR2175620A1 (xx) 1973-10-26
DE2211734A1 (de) 1973-09-20

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