EP0286500A1 - Bohrvorrichtung entlang einer kontrollierbaren Bewegungsbahn und dazugehörendes Steuerungsverfahren - Google Patents

Bohrvorrichtung entlang einer kontrollierbaren Bewegungsbahn und dazugehörendes Steuerungsverfahren Download PDF

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Publication number
EP0286500A1
EP0286500A1 EP88400711A EP88400711A EP0286500A1 EP 0286500 A1 EP0286500 A1 EP 0286500A1 EP 88400711 A EP88400711 A EP 88400711A EP 88400711 A EP88400711 A EP 88400711A EP 0286500 A1 EP0286500 A1 EP 0286500A1
Authority
EP
European Patent Office
Prior art keywords
pistons
drill string
piston
drilling
support
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.)
Withdrawn
Application number
EP88400711A
Other languages
English (en)
French (fr)
Inventor
André Cendre
Jean Boulet
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.)
S M F International
SMF International
Original Assignee
S M F International
SMF International
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 FR8704321A external-priority patent/FR2612983B2/fr
Application filed by S M F International, SMF International filed Critical S M F International
Publication of EP0286500A1 publication Critical patent/EP0286500A1/de
Withdrawn legal-status Critical Current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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
    • E21B23/004—Indexing systems for guiding relative movement between telescoping parts of downhole tools
    • E21B23/006—"J-slot" systems, i.e. lug and slot indexing mechanisms
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
    • 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

Definitions

  • the invention relates to a drilling device with controlled trajectory and to a trajectory adjustment method.
  • French patent 2,579,662 describes a drilling device with controlled trajectory comprising a train of hollow rods in which a drilling fluid circulates.
  • a drilling tool is fixed to one end of the drill string and at least one stabilization device making it possible to control the trajectory of the drill tool is fixed to the drill string, generally in the vicinity of the tool.
  • the stabilization device comprises a body connected to the drill string having a central bore coaxial with the bore of the rods, at least one bearing blade mounted to move radially in the body and a piston mounted to move in the axial direction of the bore of the body for actuation of the support blade in the direction of its radial extraction.
  • the radial extraction of the support blade (s) is obtained by axial displacement of the piston between an initial position and a final position, under the effect of a control means having the drilling fluid as a source of energy.
  • An elastic means such as a spring ensures the return of the piston to its initial position.
  • elastic means ensure the return of the support blades to their retracted position.
  • the piston is mounted movable in the central bore of the body of the stabilization device or stabilizer, not only in translation but also in rotation about the axis of the drill string.
  • This piston has on its external lateral surface, a continuous actuation surface constituted by longitudinal ramps inclined in a radial direction relative to the axis of the rods, placed one at the following the others along the periphery of the piston and connected together by complementary parts generally having a constant level in the radial direction over their entire length, that is to say that they are at a constant distance from the axis of the drill string along their entire length.
  • complementary parts ensure both the stepwise rotation of the piston by curved parts and its return to the initial position.
  • each of the support blades is associated with at least one actuating finger mounted to move radially in the body of the stabilizer and cooperating on the one hand with the actuation surface of the piston and on the other hand with the support blade.
  • the piston and the stabilizer body comprise complementary means for creating a very greatly increased pressure drop in the drilling fluid in circulation, at the end of the piston actuation movement.
  • a measurement of the pressure of the drilling fluid, carried out from the surface, thus makes it possible to detect and record the successive displacements of the piston. We can thus know at any time the position of the support blades whose movement sequence in the radial direction is predetermined by the inclination and the position of the ramps.
  • the piston is actuated by a device creating a pressure drop in the circulating drilling fluid.
  • the device comprises at least two stabilizers connected to the drill string in places axially spaced along this drill string.
  • a fine and diversified action on the direction of drilling can then require the use of complex and expensive drilling equipment.
  • the object of the invention is therefore to propose a drilling device with controlled trajectory com carrying a string of hollow rods in which a drilling fluid circulates, a drilling tool fixed to one of the ends of the rod string and at least two stabilization devices connected to the string of rods in axially spaced locations along this drill string, each comprising a body connected to the drill string having a central bore coaxial with the bore of the rods, at least one bearing blade mounted to move radially in the body and a piston mounted to move in the axial direction of the bore for actuation of the support blade in the direction of its radial extraction by axial displacement of the piston between an initial position and a final position, under the effect of a control means having the drilling fluid as source energy, the blade and the piston being returned by elastic means in their retracted position and in their initial position, respectively, each of the pistons being movably mounted in the central bore of the corresponding body, not only t in translation but also in rotation around the axis of the drill string and comprising, on its external lateral surface,
  • the pistons of the tubular stabilization devices are integral with one another and include means for creating a pressure drop in the common drilling fluid and the ramps and complementary parts constituting the surface d actuation of each of the pistons are aligned in the longitudinal direction relative to the ramps and / or complementary parts of the other pistons, the inclination of the ramps and / or the constant level in the radial direction of the complementary aligned parts being such that, for each successive stable position of the pistons, after a rotation about the axis, the blades of the stabilization devices are in extraction positions constituting a different combination from the previous one.
  • a drilling installation comprising a drill string 1 carrying at its lower end a drilling tool 2 and connected at its other end, by a conduit 4, to a pumping installation 5 allowing the injection of mud drilling from the inside of the drill string 1, at the tool 2 in the working position in the bottom of the hole 3.
  • the drill string 1 comprises successive rods such as 1a and 1b which are connected to each other and to the drilling tool 2, by intermediate elements.
  • These intermediate elements include in particular stabilizers 7a, 7c and junction pieces 9.
  • the third stabilizer 7b disposed between the stabilizers 7a and 7c has not been shown for reasons of simplification.
  • a means 6 for measuring the pumping pressure of the drilling mud On the pumping device 5 is placed a means 6 for measuring the pumping pressure of the drilling mud.
  • a measuring assembly 8 is associated with the tool and allows in particular orientation measurements of the drill string 1.
  • FIG. 2 we see a part of a drill string which has at one end a female threaded connection 11 of conical shape and, at its other end, a male threaded connection 12 also of conical shape .
  • the connections 11 and 12 allow the assembly shown in FIG. 2 to be connected to the drill string of the drilling device shown in FIG. 1.
  • the threaded connection 11, or upstream connection makes it possible to connect the assembly shown. to the part of the drill string ensuring its junction with the pumping installation 5 of the drilling fluid which circulates in the assembly shown, in the direction of the arrow 13.
  • the fitting 12, or downstream fitting makes it possible to connect the assembly to the part of the drill string comprising the drilling tool 2 intended to come to the bottom of the hole.
  • the connector 11 can be connected, for example, to a drill pipe and the connector 12 to the tool lining or to the measuring assembly 8 associated with the drill tool.
  • the assembly shown corresponds to the three successive stabilizers 7a, 7b and 7c, arranged successively in the direction of circulation of the drilling fluid, that is to say in the direction going from upstream to downstream.
  • the stabilizer 7a comprises a body 15a having a central bore 16a whose axis corresponds to the axis 18 of the drill string.
  • a piston 17a is mounted in the bore 16a, both sliding in the direction of the axis 18 and rotating around this axis.
  • the piston 17a has a double actuation surface 19a, 19 ⁇ a hollowed out in its side wall. The shape of this actuating surface will be described in more detail with reference to FIG. 3a.
  • the axial section in FIG. 2 is a broken section corresponding to two 120 ° cutting planes joining on the axis 18 of the drill string, so that the parts of the actuating surfaces 19a and 19 ⁇ a shown in FIG. 2 are arranged in 120 ° planes.
  • Actuating fingers 20a, 20 ⁇ a of radial direction are in contact at one of their ends with the actuating surfaces 19a, 19 ⁇ a, respectively.
  • the stabilizer 7a has three fingers such as 20a placed at 120 ° from one another around the axis 18, in housings provided in the wall of the body 15a of the stabilizer.
  • the stabilizer 7a likewise comprises three other fingers 20 ⁇ a placed at 120 ° from one another around the axis 18.
  • the fingers 20a and 20 ⁇ a are in contact by their end opposite their end cooperating with the actuating surfaces 19a and 19 ⁇ a respectively, with three support blades 21a arranged at 120 ° and mounted movable in the radial direction, relative to the body 15a of the stabilizer.
  • the blades 21a are returned to the retracted position, that is to say towards the inside of the body 15a, by leaf springs 22a held by closing pieces 23a.
  • the springs 22a also make it possible to keep the fingers 20a, 20 ⁇ a in contact with the actuating surfaces 19a, 19 ⁇ a, by means of the support blades 21a.
  • the actuating surfaces such as 19a, 19a have ramps of longitudinal direction inclined in a radial direction relative to the axis 18 of the drill string. Such inclined ramps 40 are visible on the actuating surfaces 19b, 19 ⁇ b and 19c, 19 ⁇ c of the stabilizers 7b and 7c respectively. It is understood that the cooperation of the ramps of the actuating surfaces and of the fingers 20, 20 ⁇ of the stabilizers makes it possible to obtain a displacement of the support blades 21 in the radial direction, during a displacement of the piston of the corresponding stabilizer, in the direction of axis 18.
  • the bodies 15a, 15b and 15c of the stabilizers 7a, 7b and 7c are not identical, at least as regards their end and connection part.
  • the body 15a of the stabilizer 7a has a front part, the end of which constitutes the connector 11 and which contains a guide assembly 24 of the piston 17a, during its movements in the direction of the axis 18.
  • the body 15a has, at its end opposite to the connector 11, a male threaded connector 25.
  • the body 15b of the stabilizer 7b has, at its end directed towards the stabilizer 7a, a female threaded connector 26 of conical shape.
  • a tubular connection piece 27 makes it possible to connect the body 15a of the stabilizer 7a to the body 15b of the stabilizer 7b, by threaded parts of conical shape corresponding to the threaded connections 25 and 26 of the bodies 15a and 15b respectively.
  • the body 15b comprises, at its end opposite the end constituting the connector 26, a male threaded connector 28 of conical shape intended to cooperate directly with a female threaded connector of corresponding conical shape machined at one of the ends of the body 15c of the stabilizer 7c.
  • the body 15c of the stabilizer 7c has at its end opposite the junction fitting with the fitting 28 of the body 15b of the stabilizer 7b a fitting female conical thread 29 onto which a tubular junction and support piece 30 can be screwed, the end opposite to the fitting 29 constitutes the male threaded fitting 12.
  • the assembly shown in FIG. 2 and comprising the three stabilizers 7a, 7b and 7c therefore comprises a tubular body constituted by the body 15a of the stabilizer 7a, the connecting piece 27, the body 15b of the stabilizer 7b, the body 15c of the stabilizer 7c and the junction and support part 30, all of these elements being interconnected by threaded connections of conical shape.
  • the pistons 17a, 17b and 17c disposed inside the bodies 15a, 15b and 15c respectively are connected by tubular spacers 32 and 33, so that they are integral, both in translation along the direction of the axis 18 that in rotation about this axis 18, in the inner bore of the corresponding stabilizer bodies.
  • the junction piece 27 has an internal bore machined so as to receive a support piece 35 on which a helical spring 34 disposed around the spacer 32 comes to bear at one of its ends.
  • the other end of the spring 34 is in abutment against a large diameter portion 32 32 of the spacer 32.
  • the spring 34 interposed between the part 27 and the spacer 32, constitutes a return spring for all of the pistons 17a , 17b and 17c connected by the spacers 32 and 33, in the direction of the axis 18 and in the direction opposite to the direction of circulation of the drilling fluid indicated by the arrow 13.
  • junction and support piece 30 carries at its end directed towards the inside of the body 15c where the piston 17c is placed, a profiled piece 35, directed along the axis 18 of the drill string.
  • the piston 17c carries, at its end directed towards the needle 35, an extension 36 of tubular shape in the internal bore of which is mounted a profiled ring 37 of a shape and a diameter allowing it to cooperate with the needle 35, during the displacement of the set of pistons in the direction of arrow 13, to create a very greatly increased pressure drop in the circulating drilling fluid.
  • the end of the needle 35 is located near the outlet section of the ring 37.
  • the extension 36 of the piston 17c also includes a free wheel 38 allowing the rotation of all of the pistons 17a, 17b and 17c, around the axis 18, in one direction.
  • the piston 17a is integral with a tubular extension constituting a support rod for the guide pistons of the device 24.
  • FIGS 3a, 3b and 3c there is shown the development of the actuating surfaces 19a, 19b and 19c intended to cooperate with a set of fingers 20a, 20b and 20c, respectively, for the radial displacement of the blades 21a, 21b and 21c of stabilizers 7a, 7b and 7c.
  • actuating surfaces 19 ⁇ a, 19 ⁇ b and 19 ⁇ c intended to cooperate with the fingers 20 ⁇ a, 20 ⁇ b and 20 ⁇ c are identical and arranged in the same way as the actuating surfaces 19a, 19b and 19c, around the surface. lateral of the pistons 17a, 17b and 17c respectively.
  • FIGS. 3a, 3b and 3c one third of the actuation surface is shown, both at very third being identical and angularly offset by 120 ° on the lateral surface of the corresponding piston.
  • Each of the parts shown in Figures 3a, 3b and 3c provides a complete cycle of movement of one of the fingers of the stabilizer.
  • FIGS. 3a, 3b and 3c have been placed in relation to each other, so as to indicate the relative positions of the different parts of these actuating surfaces on the pistons 17a, 17b and 17c, as to their longitudinal alignment.
  • FIGS. 3a, 3b and 3c in coincidence correspond to the generatrices of the external lateral surface of the pistons 17a, 17b and 17c integral with each other.
  • Each of the actuating surfaces includes ramps 30 inclined in a radial direction relative to the axis 18 of the drill string and complementary parts 41 joining the ramps 40 to each other.
  • the junction parts 41 between the ramps at constant depth have a straight part directed in the direction of the generatrices of the corresponding piston and a broken or curved part allowing two successive straight parts to be connected of the actuating surface directed along generatrices of the piston.
  • the straight sections as well as the curved sections of the complementary parts of the actuating surfaces are at constant level.
  • the actuating surfaces also constitute, at the downstream end of the straight parts, bearing zones 42 of the actuating fingers 40 corresponding to a stable position of the pistons and therefore to a working position of the stabilizers.
  • the depth of the bearing surface 42 has been indicated below the nominal surface of the piston.
  • the depth -18 of a zone 42 corresponds to a retracted position of a finger 20 and of the support blade 21, when the finger is in contact with this support zone 42.
  • the depth -2.10 ⁇ 3 m corresponds to a position extracted from the finger and the corresponding support blade.
  • FIG. 2 which corresponds to the positions 42 of the first upper horizontal line in FIGS. 3a, 3b and 3c, the blades 21a and 21b are in the retracted position and the blade 21c in the extracted position.
  • This corresponds to support areas 42a and 42b of the fingers 20a and 20b located at a depth of -18 mm and a support area 42c located at a depth of 2 mm.
  • position 1 will denote the position extracted from the finger and from the support blade corresponding to the support of the finger with an area 42 located at the -2 mm level.
  • FIG. 2 The configuration shown in FIG. 2 or on the first horizontal line in FIGS. 3a, 3b and 3c can be represented by the designation 0 0 1.
  • each of the configurations is different from the previous configuration and that it is possible to obtain at will any one of three configurations where one of the stabilizers has its support blades in the extracted position and where the other two stabilizers have their support blades in the retracted position.
  • the device is in the configuration shown in FIG. 2, the support fingers 20 being in contact with the support zones 42a, 42b and 42c located on the first line of the figures 3a, 3b and 3c.
  • the flow rate of the drilling fluid is increased, by acting on the pumping installation located on the surface, to a value Q act corresponding to the actuation flow rate.
  • This flow Q act greater than the usual drilling flow produces a pressure drop at the level of the passage formed between the ring 37 and the needle 35 sufficient for the pressure difference on either side of the set of pistons 17a and 17b causes a displacement of these pistons in the direction of the arrow 13.
  • This displacement causes a relative displacement of the finger 20a on the right part 41 of the actuating surface 19a at the level -18 and simultaneously, a displacement of the fingers 20b and 20c on ramps 40b and 40c respectively.
  • the fingers 20a, 20b and 20c come into contact with the curved part of the actuation surface and cause the rotation of the set of pistons 17a, 17b and 17c, in the direction allowed by the free wheel 38, that is to say in the direction passing the fingers 20a, 20b and 20c from the first line to the second horizontal line of Figures 3a, 3b and 3c.
  • This passage could be recorded perfectly on the surface, by a pressure measurement, since the passage of the pistons in their advanced position results in a very strong increase in pressure, the ring 37 and the needle 35 cooperating to create a very high loss load on the circulation of the drilling fluid.
  • This command is carried out very simply from the surface and does not require independent intervention on each of the stabilizers.
  • the structure of the device making these corrections and the control means associated with it are particularly simple and can be produced entirely in mechanical and hydraulic form.
  • a common actuation means will be used for all of the pistons which remain integral during their movement and a common means for creating a significant pressure drop in the drilling fluid making it possible to determine, from the surface, the position of the pistons.
  • the stabilizers can be separated by any distance, the lengths of the connecting pieces between the stabilizer bodies and spacers between the pistons being chosen accordingly.
  • the invention applies to any drilling device using a fluid circulating in a drill string.
  • the invention also relates to a method for adjusting the trajectory of a drilling tool fixed to the end of a drill string on which are arranged at least two stabilization devices each comprising a body, a set of blades support and a movable member in the body to ensure the extraction of the support blades relative to the body in a radial direction relative to the drill string.
  • the movable members are actuated simultaneously so as to obtain a desired combination of the positions of extraction of the support blades on the stabilization devices, this combination being chosen from a set of different predetermined combinations each corresponding to a position of the moving parts.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Sheet Holders (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Drilling And Boring (AREA)
EP88400711A 1987-03-27 1988-03-23 Bohrvorrichtung entlang einer kontrollierbaren Bewegungsbahn und dazugehörendes Steuerungsverfahren Withdrawn EP0286500A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704321A FR2612983B2 (fr) 1985-04-02 1987-03-27 Dispositif de forage a trajectoire controlee et procede de reglage de trajectoire correspondant
FR8704321 1987-03-27

Publications (1)

Publication Number Publication Date
EP0286500A1 true EP0286500A1 (de) 1988-10-12

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ID=9349514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400711A Withdrawn EP0286500A1 (de) 1987-03-27 1988-03-23 Bohrvorrichtung entlang einer kontrollierbaren Bewegungsbahn und dazugehörendes Steuerungsverfahren

Country Status (5)

Country Link
US (1) US4844178A (de)
EP (1) EP0286500A1 (de)
JP (1) JPS63251593A (de)
BR (1) BR8801389A (de)
NO (1) NO881334L (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008370A2 (en) * 1989-11-23 1991-06-13 Bergh Johannes W H Den Device for steering the foremost part of a drill pipe
GB2357101A (en) * 1999-12-10 2001-06-13 Baker Hughes Inc Simultaneous Drilling and Casing Of Wellbores

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DE3561830D1 (en) * 1985-01-07 1988-04-14 Smf Int Remotely controlled flow-responsive actuating device, in particular for actuating a stabilizer in a drill string
US4995466A (en) * 1989-12-22 1991-02-26 Snow Jr Roy W Method and device for stabilizing the path of a drilling tool
US5265684A (en) * 1991-11-27 1993-11-30 Baroid Technology, Inc. Downhole adjustable stabilizer and method
US5311953A (en) * 1992-08-07 1994-05-17 Baroid Technology, Inc. Drill bit steering
US5318137A (en) * 1992-10-23 1994-06-07 Halliburton Company Method and apparatus for adjusting the position of stabilizer blades
US5318138A (en) * 1992-10-23 1994-06-07 Halliburton Company Adjustable stabilizer
US5332048A (en) * 1992-10-23 1994-07-26 Halliburton Company Method and apparatus for automatic closed loop drilling system
US5390749A (en) * 1994-01-31 1995-02-21 Ingersoll-Rand Company Apparatus for positioning a split retaining ring in a down-hole percussive drill
US5752572A (en) 1996-09-10 1998-05-19 Inco Limited Tractor for remote movement and pressurization of a rock drill
GB2342935B (en) * 1998-10-12 2000-12-06 Pilot Drilling Control Ltd Indexing mechanism and apparatus incorporating the same
DE60011587T2 (de) 1999-11-10 2005-06-30 Schlumberger Holdings Ltd., Road Town Steuerungsverfahren für steuerbares bohrsystem
US7136795B2 (en) 1999-11-10 2006-11-14 Schlumberger Technology Corporation Control method for use with a steerable drilling system
US6840336B2 (en) * 2001-06-05 2005-01-11 Schlumberger Technology Corporation Drilling tool with non-rotating sleeve
US20030127252A1 (en) * 2001-12-19 2003-07-10 Geoff Downton Motor Driven Hybrid Rotary Steerable System
GB2405483B (en) 2002-05-13 2005-09-14 Camco Internat Recalibration of downhole sensors
US6761232B2 (en) 2002-11-11 2004-07-13 Pathfinder Energy Services, Inc. Sprung member and actuator for downhole tools
US7204325B2 (en) * 2005-02-18 2007-04-17 Pathfinder Energy Services, Inc. Spring mechanism for downhole steering tool blades
US7383897B2 (en) * 2005-06-17 2008-06-10 Pathfinder Energy Services, Inc. Downhole steering tool having a non-rotating bendable section
US8118114B2 (en) * 2006-11-09 2012-02-21 Smith International Inc. Closed-loop control of rotary steerable blades
US7464770B2 (en) * 2006-11-09 2008-12-16 Pathfinder Energy Services, Inc. Closed-loop control of hydraulic pressure in a downhole steering tool
US7967081B2 (en) * 2006-11-09 2011-06-28 Smith International, Inc. Closed-loop physical caliper measurements and directional drilling method
US7377333B1 (en) 2007-03-07 2008-05-27 Pathfinder Energy Services, Inc. Linear position sensor for downhole tools and method of use
US7725263B2 (en) * 2007-05-22 2010-05-25 Smith International, Inc. Gravity azimuth measurement at a non-rotating housing
US8497685B2 (en) 2007-05-22 2013-07-30 Schlumberger Technology Corporation Angular position sensor for a downhole tool
US7950473B2 (en) * 2008-11-24 2011-05-31 Smith International, Inc. Non-azimuthal and azimuthal formation evaluation measurement in a slowly rotating housing
US8550186B2 (en) * 2010-01-08 2013-10-08 Smith International, Inc. Rotary steerable tool employing a timed connection

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US3129776A (en) * 1960-03-16 1964-04-21 William L Mann Full bore deflection drilling apparatus
US4491187A (en) * 1982-06-01 1985-01-01 Russell Larry R Surface controlled auxiliary blade stabilizer
FR2575793A1 (fr) * 1985-01-07 1986-07-11 Smf Int Dispositif d'actionnement a distance d'un equipement associe a un conduit dans lequel circule un fluide incompressible
FR2579662A1 (fr) * 1985-04-02 1986-10-03 Smf Int Dispositif de forage a trajectoire controlee

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US3123162A (en) * 1964-03-03 Xsill string stabilizer
US3424256A (en) * 1967-01-10 1969-01-28 Whipstock Inc Apparatus for controlling directional deviations of a well bore as it is being drilled
US4388974A (en) * 1981-04-13 1983-06-21 Conoco Inc. Variable diameter drill rod stabilizer
US4407377A (en) * 1982-04-16 1983-10-04 Russell Larry R Surface controlled blade stabilizer
US4683956A (en) * 1984-10-15 1987-08-04 Russell Larry R Method and apparatus for operating multiple tools in a well

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US3129776A (en) * 1960-03-16 1964-04-21 William L Mann Full bore deflection drilling apparatus
US4491187A (en) * 1982-06-01 1985-01-01 Russell Larry R Surface controlled auxiliary blade stabilizer
FR2575793A1 (fr) * 1985-01-07 1986-07-11 Smf Int Dispositif d'actionnement a distance d'un equipement associe a un conduit dans lequel circule un fluide incompressible
FR2579662A1 (fr) * 1985-04-02 1986-10-03 Smf Int Dispositif de forage a trajectoire controlee

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008370A2 (en) * 1989-11-23 1991-06-13 Bergh Johannes W H Den Device for steering the foremost part of a drill pipe
WO1991008370A3 (en) * 1989-11-23 1991-11-14 Bergh Johannes W H Den Device for steering the foremost part of a drill pipe
GB2357101A (en) * 1999-12-10 2001-06-13 Baker Hughes Inc Simultaneous Drilling and Casing Of Wellbores
GB2357101B (en) * 1999-12-10 2002-07-17 Baker Hughes Inc Apparatus and method for simultaneous drilling and casing wellbores

Also Published As

Publication number Publication date
JPS63251593A (ja) 1988-10-19
US4844178A (en) 1989-07-04
BR8801389A (pt) 1988-11-01
NO881334D0 (no) 1988-03-25
NO881334L (no) 1988-09-28

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