EP2004946A1 - Dispositif d'orientation d'outils de forage - Google Patents
Dispositif d'orientation d'outils de forageInfo
- Publication number
- EP2004946A1 EP2004946A1 EP07731198A EP07731198A EP2004946A1 EP 2004946 A1 EP2004946 A1 EP 2004946A1 EP 07731198 A EP07731198 A EP 07731198A EP 07731198 A EP07731198 A EP 07731198A EP 2004946 A1 EP2004946 A1 EP 2004946A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- main body
- shaft
- bearing
- pivot
- housing
- 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
Links
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
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- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000005355 Hall effect Effects 0.000 description 1
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- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
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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
- E21B7/067—Deflecting the direction of boreholes with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub
Definitions
- the present invention relates to the field of drilling. It concerns in particular drilling requiring a trajectory control, particularly in the fields of the oil and gas industry, civil engineering, geothermal energy and more generally in all fields of intervention in trenchless terrain.
- the drilling systems employed may be entirely mechanical, or may include electronic equipment.
- Static Feature adjustable connection, also called connector angled, reg ⁇ traveling web surface to equip a turbine type downhole motor, PDM ( "Positive Displacement Motor”), or electric motor
- PDM Positive Displacement Motor
- Pseudo-dynamic device swiveling connection activated autonomously or from the surface, only for the sliding phases without rotation of the drill string, designated by the Anglo-Saxon term “sliding”, to equip a turbine type bottom engine or alternatively activated variable diameter stabilizer, or the like
- Dynamic device system controlled in real time from the surface or autonomously for the realization of rotary drilling systems of type known to those skilled in the art under the term “Rotary Steerable System", abbreviated RSS.
- EP 0 744 526 and US Pat. No. 4,947,944 describe means for so-called “external" coupling for a set of elements of a drill string and drill tools.
- US Patent Application Publication No. 2005/0173155 discloses an assembly of drilling means in which a locking means is provided for transmitting to the shaft a torsion torque generated by the casing or casing, disengageably.
- the present invention therefore aims to provide a device for orienting a drilling tool (drill bit, PDC, bit, etc.), said device being usable in various variants adaptable to the needs and, moreover, easy to operate in all places.
- its maintenance is easy, and the life of its most stressed parts is also improved, since it takes into account the asymmetry between the upstream and downstream of the device, namely respectively between bottom end of the main drill string or BHA (Bottom HoIe Assembly) and drill / drill bit.
- An object of the invention is to provide an orientation device architecture, also called “swivel fitting” or “elbow fitting”, to overcome the limitations indicated above.
- Such a device has a reduced length and, therefore, offers a large BUR despite a low angle of elbow (or orientation angle), is also reliable and economical to manufacture, and allows easy assembly and maintenance to achieve.
- the device comprises, in order to make it possible to control the orientation of the drill / bit tool to which it is integrated, essentially a main body and an orientable housing, arranged consecutively from upstream to downstream and respectively bound respectively.
- at least one link advantageously of pivot type, sliding pivot, ball or linear annular forming a first bearing, and at least one pivot connection forming a second bearing, to a curved or flexible transmission shaft which passes through longitudinally, while a an appropriate connection forming a third bearing between said transmission shaft and the main body is arranged near the end of said main body located on the side of said steerable housing, and while the orientation is achieved by means of relative displacement essentially radial of the main body with respect to the orientable housing near their interface, hereinafter referred to as "deflection system", said main body being optionally equipped on its periphery with support pads of a diameter less than or equal to the diameter of the drill / bit tool and said steerable housing optionally being provided on its periphery with support pads of a diameter less than
- support pads The function of said support pads is to bear on the wall of the well drilled for an optimal deviation of the drill / drill bit, and to slow the rotation relative to the axis of the well and possibly cause the stopping or locking the device in rotation, in cooperation with the walls of the drilled well in the case of crampons.
- downstream direction conventionally refers to the direction of the drill bit / bit
- upstream direction refers to the upper end of the drill string
- the device according to the invention comprises, consecutively from upstream to downstream, a main body and a steerable housing in operative relation thereto, a traversing shaft, and at least three bearings and preferably three bearings as defined above, and advantageously support pads and / or cleats as aforesaid, the deflection exerted by means of a suitable deflection system leading to the desired curvature of the curved or flexible shaft, c that is, in practice at the desired orientation angle between the longitudinal axes of the main body and the steerable housing.
- the shaft is strongly stressed near the aforementioned bearings, and it is preferred that all bearings and other components cooperating with the shaft are hooped.
- the bending of the shaft is achieved by substantially radial displacement of the upper end of the orientable housing relative to the lower end of the main body, under the action of a deflection system.
- a deflection system is of known type, or its design is within the reach of the skilled person.
- Said deflection is effected, in practice, by essentially radial displacement of the upper end of the orientable housing with respect to the longitudinal axis of the main body, by means of a deflection system, by being supported either on the transmission shaft or the main body (so-called “internal” coupling), or on the wall of the drilled well (so-called “external” coupling).
- the coupling can only be internal in the static version.
- the originality of such a device lies essentially in the use of the controlled bending of the drive shaft to articulate the body of the device.
- Such a mode of operation of the device allows its compatibility with existing guidance devices, whether internal or external.
- the deflection device integrated in the orientation device according to the invention it can be implemented in the case of a static orientation device, in preferred embodiments, illustrative and non-limiting, by means of two radially eccentric rings, a ball joint and a sliding pivot connection; the deflection is then obtained by differential rotation of the two rings.
- Figure 1 shows, in partial longitudinal schematic section, a device according to the invention, in its position for rectilinear drilling, and in its embodiment described as static or pseudo-dynamic;
- Figure 2 shows, in partial longitudinal schematic section, a device according to FIG. 1, in a position for curved drilling
- FIG. 3 represents, in partial longitudinal schematic section, a device according to the invention, in its position for rectilinear drilling, and in its embodiment described as dynamic, with a so-called “external”coupling;
- FIG. 4 shows, in partial longitudinal schematic section, a device according to FIG. 3, in a position for curved drilling
- FIG. 5 represents, in partial longitudinal schematic section, a device according to the invention, in its position for rectilinear drilling, and in its so-called dynamic embodiment, with so-called "internal" coupling;
- Figure 6 shows, in partial longitudinal schematic section, a device according to FIG. 5, in a position for curved drilling
- FIGS. 1A, 3A, 5A, 1B, 2B, 3B, 4B, 5B and 6B are diagrammatic cross-sectional views respectively of A-A or B-B of the devices according to the respective figures bearing the same number;
- Figure 7 is a more detailed representation, in longitudinal section, of a device according to the invention, in its static version and in its position for rectilinear drilling;
- Figure 8 is a more detailed representation, in longitudinal section, of a device according to FIG. 7, in its position for curved drilling;
- Figure 9 is a more detailed representation, in partial schematic longitudinal section, of a bearing assembly, with shrink connection in a device according to the invention.
- the device having an orientable connection architecture essentially comprises a main body 1 and an orientable housing 2, respectively connected by at least one connection of pivot type, sliding pivot, ball or linear annular forming a first bearing 4 and at least one pivot connection forming a second bearing 5 to a transmission shaft 3 curvable or flexible, which passes through them longitudinally, while a suitable connection forming a third bearing 6 between said transmission shaft and the main body, is arranged near the interface between said main body and said housing, and while the orientation is achieved by means acting as a deflection system 7 to control the substantially radial relative displacement of the main body 1 relative to the orientable housing 2 near their interface, said main body being optionally equipped on its periphery of support pads 9 with a diameter less than or equal to the diameter of the drilling tool / bit 16, and said steerable housing being optionally equipped on its perip
- connection forming a third bearing is meant here, advantageously, a link type pivot, sliding pivot, annular linear or ball joint.
- the steerable housing 2 is located downstream of the main body 1, with respect to the direction of advancement of the system incorporating the device.
- the bending of the shaft 3 that is to say the orientation according to the desired angle between the longitudinal axes of the main body and the orientable housing, is achieved by essentially radial displacement of the steerable housing 2 relative to the main body 1, and / or relative to the transmission shaft 3, under the action of a deflection system 7.
- a joint is formed between the main body 1 and the steerable housing 2, in the form of a curved or flexible shaft 3 connected to each of these two parts 1, 2 by a pivot connection and means of Orientation placed between the main body 1 and the steerable housing 2 and able to move the adjacent ends thereof substantially radially relative to each other.
- a device also comprises, in practice, a front wiper seal assembly + seal 8, pads 9 for the main body 1, support pads 10a for the steerable housing 2, a pressurizing device 11, a high connection 12 and a low connection 13, a functional assembly comprising stator-motor, turbine, etc. 14, a rotor-motor assembly, turbine, etc.
- a drill / bit tool (PDC or tricone) 16
- PDC drill / bit tool
- one or more electronic compartments 17 comprising sensors, a real-time computer, a gear such as gear / crown gear 18 driving at least an alternator 19a and / or at least one hydraulic pump 19b.
- the pivot connection between the main body 1 and the shaft 3 is made by means (A) of a so-called upper bearing 4 of the pivot or ball joint type, and (B) of a bearing 6 said central annular linear type, these two bearings being located near the two respective ends of the main body 1, while the central bearing 6 is on the steerable housing side 2, and the pivot connection between the steerable housing 2 and the shaft 3 is performed by means of a so-called lower bearing 5, located near the end of the orientable housing 2 located on the side of the drill / drill bit.
- the device according to the invention makes it possible in practice to provide an angle of elbow said Bent angle of about 0 ° to 1 ° and more.
- the device according to the invention comprises a main body 1 equipped with support pads 9 at the diameter of the drilling tool at each of its ends, and a steerable housing 2 equipped with support pads 10a to the diameter of the drill bit at its lower end ("bit" side) and, in dynamic configuration, crampons or knives at its upper end (main body side) to allow the braking or even stopping by rotational locking of the main body 1 and the steerable housing 2 respectively by friction and grooving of the wall of the drilled well.
- the main body can integrate a feeder, preferably tungsten, to limit the rotation of the main body 1 and the steerable housing 2 relative to the wall of the well.
- a feeder preferably tungsten
- the system comprises three bearings (4, 5, 6), on which is mounted at least one traversing shaft 3, while the deflection leads to the desired orientation angle between the longitudinal axes of the main body and the steerable housing Said deflection is achieved, in practice, by essentially radial displacement of the upper end of the orientable housing 2 relative to the main body 1, by means of a deflection system 7.
- Deflection system is a system advantageously comprising a spring preloaded slide, a ball and two eccentric rings radially, such a system being controlled and lockable manually.
- the deflection system is advantageously placed in front of the central bearing so that the point of rotation of the drill bit is as close as possible to the center of the bearing pads 10a forming an annular linear connection with the wall of the drilled well, with effect of reducing parasitic forces.
- the front seal it is preferably pressed against the end of the steerable housing 2 under the combined action of the pressurizing internal pressure and a spring, preferably a spring with corrugated turns.
- the pressurizing device is preferably placed in the orientable housing 2, but any other arrangement is conceivable.
- said bearings (4, 5, 6) can be composed of either bearings, including ball bearings, spherical roller bearings, tapered roller bearings, cylindrical roller bearings or needle bearings or bearings called CARB TM marketed by the Swedish company SKF; either bearings hydrodynamic, especially oil or drilling mud; or any combination of the two previous types.
- the bearings 4, 5, 6 are hydrodynamic, or consist of ball bearings and / or advantageously preloaded roller bearings to maximize the stiffness of the bearings and their impact resistance.
- the transmission shaft 3 is hollow tubular, to allow the passage of the drilling fluid (s) with a mirrimum of pressure drop, and the passage of measuring probes descended by means of a cable being drilled (for measurements usually referred to as "thru the bit measurement” or measurements through the wick).
- the transmission shaft 3 is advantageous for the transmission shaft 3 to be made of composite or alloy materials having a high ratio between its endurance limit in alternating flexion and its Young's modulus, in order to increase the flexibility to maximize the deflection or BUR without reducing its life in rotary bending, as the lower bearing 5.
- the monobloc shaft is in this case advantageously made of titanium alloy, beryllium bronze, steel non-magnetic stainless steel or alloy steel with high mechanical properties. In the case of use with a MWD, which is then generally located just above the device or even integrated therewith, nonmagnetic alloys are preferred.
- the components such as bearings, ring gear, bearing, etc.
- the shaft is attached to the shaft by shrinking, thermal or mechanical, so that the shaft has no groove, neither shoulder nor throat, or in practice no abrupt and significant section changes. Only the ends of the shaft, which are less stressed, may have threads and grooves seal.
- the connection of the respectively low and high connections 12, 13 with the transmission shaft 3 is achieved by a threading associated with a mechanical hoop ensuring the transmission respectively of the traction / compression forces (abbreviated WOB) and torque to the drill bit / bit 16 (see Fig. 9).
- WOB traction / compression forces
- these mechanical frets are hydraulically controlled, to facilitate assembly and maintenance of the entire device. Such a device thus avoids the use of an expensive clamping bench, generally not available on the site, and also allows the control of the preload of the bearings by simple measurement of hydraulic pressure when the lower and upper bearings are backed connections (see Fig. 9).
- connections between said shaft and the high and low connections 12, 13 are made by threading for the axial forces and by shrinking for the transmission of torque.
- a shaft 3 passes centrally through the orientable housing 2 along its axis of axial symmetry Z-Z ', and a bearing sleeve 20 supports a bearing 5 provided with an internal spacer 21 and an outer spacer 22, as well as a bearing hoop 23.
- a bearing and the connection 24 (manually tightened on the shaft) to the drill bit / bit 16, or alternatively, the drill bit / wick 16 itself, is provided with a sealing support 25, a connection ring 26, a conical ring 32 and a locking nut 29.
- a plug / hydraulic connection 27 and a ring conical 32 for prestressing said bearing 5, and a locking nut 29 allow pumping at a given pressure for the introduction / preloading of the bearings and reversible mechanical shrinking of the bearing sleeve 20 on the shaft 3.
- the sealing support 25 we pump through the clamping orifice 28, to axially move the hoop 26 relative to the conical ring 32 and thus ensure the reversible mechanical shrinking of the connection 24 on the shaft 3.
- the clamping is completed by a clamping / locking operation of the sealing support 25, the locking nut 29, as well as the hydraulic plugs / connections 27, 28 and 30.
- Disassembly of such an assembly ensuring the mounting of bearings in a device according to the invention comprises the steps of: unblocking / loosening of the locking nut 29, pumping by the hydraulic connection 27, loosening of the sealing support 25, pumping through the connection hydraulic 30 for loosening the bearing ring 23, and manually loosening the connection 24.
- all or almost all the structural components of the device which constitute the bulk of the mass of the orientable coupling are preferably non-magnetic alloys, ceramic, composite material and / or plastic, so as not to disturb the measurements of the MWD tools, which are generally located just above the device or even integrated therewith.
- all the mechanisms are immersed in oil maintained at an overpressure of about 0.01 to 1 MPa and more with respect to its environment, advantageously thanks to a device of pressurization preferably performed by means of an annular piston pushed by the pressure of the surrounding fluid and a spring housed between the body of the housing and the transmission shaft.
- a front wiper and seal assembly or a metal bellows, made of plastic or elastomeric laminate, seals between the main body 1 and the orientable housing 2.
- these are advantageously straight blades or helical, preferably stripped to reduce the risk of clogging, acting as stabilizers not rotating, of a diameter less than or equal to the diameter of the drill bit / bit.
- These non-rotating stabilizers are preferably provided with "buttons" respectively aligned or helically, advantageously made of tungsten carbide or polycrystalline diamond (abbreviated as PDC), or provided with an abrasion-resistant deposit.
- the device according to the invention When designed to form a dynamic coupling with internal coupling, the device according to the invention is advantageously equipped, at the end of the orientable housing 2 located on the side of the deflection system 7, longitudinal blades or crampons 10b intended to allow the rotational braking of the swivel connection by grooving the wall of the drilled well.
- these crampons or blades are advantageously made of carbide tungsten or polycrystalline diamond (abbreviated PDC), to optimize their longevity regardless of the type of training drilled.
- the deflection device integrated in the connecting device it is preferably realized, in the case of a static coupling device, by means of two radially eccentric rings, a ball joint and a a slidable sliding pivot connection with a spring; the deflection is then obtained by differential rotation of the two rings.
- this deflection device is conventionally realized, on the basis of the knowledge of those skilled in the art.
- the jack or cylinders are preferably powered by a pump whose pistons are arranged in a cylinder around the shaft and driven by a cam integral with said shaft.
- a pump whose pistons are arranged in a cylinder around the shaft and driven by a cam integral with said shaft.
- one or more barrel pumps 19b can be provided and used, driven by a multiplier pinion-crown assembly.
- each jack is advantageously controlled by a solenoid valve, normally open. If the orientation system thus designed is reversible, the system spontaneously returns to its neutral position, to ensure the return of the device according to the invention in rectilinear drilling position in case of incident and thus limit the risk of jamming during the ascent of the drilling set.
- the orientation device according to the invention has no battery and is powered by an annular generator, in particular with permanent magnets (not shown) disposed around the shaft 3 and driven by the latter by means of an epicyclic gear multiplier, not shown.
- said pump or pumps and said generators are arranged on the same axis and advantageously share the same drive pinion.
- the device according to the invention advantageously comprises a group of pumps, generators, solenoid valves, cylinders and pressure relief valves, arranged to be able to activate relative displacement means.
- the main body 1 integrates "at-bit” measuring sensors such as, for example, measurements of inclination, azimuth, pressure, temperature, natural gamma radiation, resistivity, "WOB”, torque to the tool, vibratory level ("bit bouncing” and / or “whirling"), rotational speed, "stick -slip “or grazing, etc.
- the measurements of natural gamma radiation are directional, taking into account the eccentricity of said crystals and the (slow) rotation of the main body 1 relative to the drilled well.
- the main body 1 includes a rotation detector (not shown) of the drill string (in the absence of rotation, it is in sliding mode ("sliding") with shaft 3 bent, while with a rotation one is in "turning” mode ("rotary") with straight shaft ", for autonomous activation of the steerable housing 2, without resorting to a transmission surface / bottom.
- the rotation detector of the drill string is entirely mechanical (for example unbalanced in free rotation around the main body 1, mass in radial translation, etc.) for high temperature applications, especially at temperatures of about 200 ° C and higher.
- said device advantageously integrates in or on its main body 1 tilt and azimuth sensors or an inertial unit or unbalance in free rotation associated with an angular encoder and an inclinometer, coupled to a real-time computer, for controlling the deflection device in a given direction or trajectory.
- the orientation device in its pseudo-dynamic as well as dynamic embodiment, can be remotely controlled from the surface by means of coding using slurry pressure and / or rotation of the drill string as parameters, or by means of electromagnetic wave transmission, with or without relays.
- An appropriate bidirectional transmission equipping the swiveling connectors according to the invention of both pseudodynamic and dynamic type has the advantage of allowing surface measurements to be transmitted at the tool level (so-called tool measurements). good with that without relays, according to preferences and environmental constraints, which makes drilling interactive.
- orientation device with sensors such as those indicated above, and an electrical interface with connector (comprising at least one wire + ground) to advantageously four contacts (2 wires power supply and 2 communication wires) plus the mass, to allow dialogue (programming, parameter setting, memory read-back, etc.) with a computer or even directly via a network.
- an electrical interface with connector comprising at least one wire + ground
- orientation device according to the invention is placed in practice between conventional upstream elements (MWD, LWD, motor, etc., and drill string) and the drilling tool ( wick / PDC / trephine) downstream, or at the limit can even integrate or be integrated with one of these elements.
- the invention also relates to a method for carrying out controlled drilling, that is to say requiring precise control of trajectory.
- at least one orientation / reorientation device according to the present invention is provided and operated under the action of a suitable deflection device.
- the application of the reorientation device may be particularly advantageous when the drilling has undergone an undesired curvature or it is preferable to reorient the trajectory of a well whose production decreases.
- the method according to the invention comprises the characteristics, embodiments and / or advantageous variants indicated above for the swivel coupling device itself or its components.
- the present invention provides an architecture for the orientation of a drilling tool, to overcome the limitations of the prior art, and having the significant advantages of reduced length, the ability to provide a large BUR despite a low angle elbow, high reliability, and extremely easy and economical manufacturing and maintenance.
- Said method may optionally include the analysis of the variations of the signals of the aforesaid generator (s), with a view to detecting a malfunction such as overspeed or "stick-slip".
- It may also include the implementation of means for detecting, advantageously mechanical modes of drilling by progression without rotation of the drill string ("sliding") and with rotation of the drill string (“rotary”) for autonomous operation .
- the method may comprise the implementation of means for controlling the orientation of the steerable housing 2, in particular by integration advantageously in the main body 1 of an unbalance coupled to an angular encoder and an inclinometer, as well as a real-time calculator.
- the method according to the invention may also comprise the implementation of means for controlling the orientation of the steerable housing 2 in all directions, in particular by integration advantageously in the main body 1 of a deflection probe (preferably composed of 3 magnetometers + 3 accelerometers) and a real time calculator.
- a deflection probe preferably composed of 3 magnetometers + 3 accelerometers
- a real time calculator preferably composed of 3 magnetometers + 3 accelerometers
- this functionality can be ensured by integration in the main body 1 of an inertial unit, advantageously of the MEMS type, and of a real time calculator.
- the device according to the present invention has a miniaturization potential making it possible to envisage embodiments for drilling phases less than or equal to 5 "7/8. Moreover compatible with a reamer / underreamer, placed upstream of said device, it is possible to drill different diameters with the same device.
- the drilling fluid (s) and the WOB (“weight on bit”) pass directly through the tubular transmission shaft, respectively making it possible to reduce the pressure losses and, in the case of static systems, and pseudodynamic, to place the stop in the main body 1.
- the length of the steerable housing 2 is thus reduced to the maximum, without compromising the life of the stop, resulting in a large BUR with an angle of weak elbow.
- MWD / LW by reducing the distance between the different measuring points and the wick (PDC or Tricone, for example); 0 increase the BUR and render the directional performance of the RSS insensitive to the inclination of said RSS with supports of the main body and the housing to the diameter of the drill / drill bit; and 0 reduce the mass, investment and costs of product implementation and transportation, among others; • give access to all the mechanical and electronic organs of the RSS, without the need to completely dismount the RSS, so that the costs of assembly and maintenance are greatly reduced;
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0602621A FR2898935B1 (fr) | 2006-03-27 | 2006-03-27 | Dispositif d'orientation d'outils de forage |
PCT/FR2007/000515 WO2007110502A1 (fr) | 2006-03-27 | 2007-03-26 | Dispositif d'orientation d'outils de forage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2004946A1 true EP2004946A1 (fr) | 2008-12-24 |
EP2004946B1 EP2004946B1 (fr) | 2012-10-03 |
Family
ID=37441351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07731198A Active EP2004946B1 (fr) | 2006-03-27 | 2007-03-26 | Dispositif d'orientation d'outils de forage |
Country Status (6)
Country | Link |
---|---|
US (1) | US8887834B2 (fr) |
EP (1) | EP2004946B1 (fr) |
CN (1) | CN101473102B (fr) |
CA (1) | CA2647397C (fr) |
FR (1) | FR2898935B1 (fr) |
WO (1) | WO2007110502A1 (fr) |
Families Citing this family (67)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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2007
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- 2007-03-26 US US12/294,375 patent/US8887834B2/en active Active
- 2007-03-26 CA CA2647397A patent/CA2647397C/fr active Active
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- 2007-03-26 CN CN200780010934.1A patent/CN101473102B/zh not_active Expired - Fee Related
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CA2647397C (fr) | 2015-01-20 |
CN101473102A (zh) | 2009-07-01 |
US8887834B2 (en) | 2014-11-18 |
CN101473102B (zh) | 2013-10-02 |
EP2004946B1 (fr) | 2012-10-03 |
FR2898935A1 (fr) | 2007-09-28 |
FR2898935B1 (fr) | 2008-07-04 |
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