EP1492935B1 - Procede et dispositif de carottage et/ou forage devie - Google Patents

Procede et dispositif de carottage et/ou forage devie Download PDF

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Publication number
EP1492935B1
EP1492935B1 EP03711719A EP03711719A EP1492935B1 EP 1492935 B1 EP1492935 B1 EP 1492935B1 EP 03711719 A EP03711719 A EP 03711719A EP 03711719 A EP03711719 A EP 03711719A EP 1492935 B1 EP1492935 B1 EP 1492935B1
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EP
European Patent Office
Prior art keywords
bit
wall
drilling
coring
destructible element
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
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EP03711719A
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German (de)
English (en)
French (fr)
Other versions
EP1492935A1 (fr
Inventor
Philippe Fanuel
Georges Dechief
Luis Quintana
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.)
Halliburton Energy Services Inc
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Halliburton Energy Services Inc
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Publication of EP1492935A1 publication Critical patent/EP1492935A1/fr
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    • 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
    • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock
    • 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
    • E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors

Definitions

  • the present invention relates to a method of coring and / or drilling through a wall of a borehole which has been cored or drilled in a subterranean formation, for core drilling and / or transversely deflected drilling from and relative to at a longitudinal direction of the borehole.
  • deflection means are provided in the borehole which act on the outside of the drill bit or coring ring. Placing these means in precise locations and orientations of the borehole is complicated and expensive.
  • the object of the present invention is to remedy the problem stated above and to propose a method in which a corer carries, at least the time of carrying out the deflection operation, its own guiding means.
  • a corer carries, at least the time of carrying out the deflection operation, its own guiding means.
  • the method of the invention comprises, besides a selection of a corer provided with a coring ring having a bore of internal gauge, an arrangement, in the corer, of an inner guide which is made of a material resistant to abrasion of the crown; in addition, before initiating a deviated coring, said guide is internal to at least the bore of internal gauge, so that the crown can circulate along the inner guide.
  • the guide extends in front of the crown, in a coring direction thereof, and is arranged to progressively deflect the ring from said longitudinal direction to the wall, in a desired deflected path direction.
  • the method then comprises starting the coring with said ring and guiding the ring by its inner bore bore cooperating with the inner guide, to penetrate into said wall and into the formation to a desired depth according to the deviated course.
  • a destructible element which is in a material chosen to be destroyed by the crown, being cored along the deflected path, and which is of a size chosen to pass in the borehole.
  • a guide means arranged to give the path direction deviated to the inner guide is fixed.
  • the aforesaid internal guide is used as a guiding means in the destructible element, and the destructible element is fixed to the borehole wall in a location chosen for a deflected core.
  • the detachable attachment between the crown and the destructible element is broken, and the crown is rotated and pushed forward to follow the deviated path given by the internal guide, destroying the part of the destructible element that it meets and penetrating into said wall and into the formation to a desired depth.
  • the method comprises, before the deviated coring proper, an arrangement, as a guide means in the destructible element, of a guide channel whose one end is substantially coaxial with the bore of internal gauge and whose path corresponds to the desired deviated path. Then there is available, in particular in stages, a drill rig, carried by a drill string, through the corer and the bore of internal caliber and along the guide channel. A drilling is carried out by the machine in the wall of the borehole according to the deviated path given by said channel, the drill string having a length chosen so that, when the drill rig is driven into the wall to a depth of d anchoring chosen, the drill string is still engaged in at least the bore of inner caliber of the crown.
  • the inner guide is previously sent and stuck in the wall of the borehole, to fix it, before the crown is put into action. Then, the crown actuated will be advanced along the inner guide to release it from its fixation in said wall. We can then provide a withdrawal of said inner guide through the corer when it has been deflected.
  • the method comprises, before the deviated coring itself, an arrangement, as a guide means in the destructible element, of a guide channel, one of which end is substantially coaxial with the bore of internal gauge and whose path corresponds to the desired deviated path.
  • the destructible element is fixed to said borehole wall at the location chosen for the deflection.
  • a drilling apparatus carried by a drill string, is arranged through the corer and the bore of internal gauge and that it follows the guide channel towards said wall.
  • the drilling machine is fixed to the corer, so that it projects from a determined distance out of the crown into the guide channel.
  • the detachable fastener between the crown and the destructible element is broken and the crown and the drill rig are rotated and pushed forward and a drilling is carried out by the machine in the wall of the vehicle. borehole, according to said deflected path given by the guide channel, and core coring according to the deflected path given by the drill string and the drill, destroying the portion of the destructible element and said channel guide it meets and penetrating into said wall and into the formation to a desired depth.
  • the inner guide moves forward of the crown, at the same time, and in principle of the same value, as the crown but can also organize a withdrawal of said inner guide through the corer when it will have been diverted.
  • the invention also relates to a device for coring and / or drilling through a wall of a borehole which has been cored or drilled beforehand into an underground formation, for core drilling and / or transversely deflected drilling from and through relative to a longitudinal direction of the borehole.
  • the device of the invention comprises a corer, provided with a coring ring having an internal bore, and an inner guide which is made of a material resistant to abrasion of the crown, which, before initiating a coring deflected, is interior to at least the bore of internal caliber, so that the crown can circulate along the inner guide, which extends in front of the crown, in a direction of advance of coring thereof , a destructible element (9), which is detachably secured in front of the ring gear (3) in the coring direction thereof, is of a material selected to be destroyed by the ring gear (3) being coring and / or deviated drilling, and is of a size chosen to pass into the borehole, and in which is fixed a guide means (11) arranged to give a deviated path direction to the inner guide extending in front of the crown, the inner guide being, during the coring and / or deflected drilling, held fixed so as to give the crown (3) said desired deflected path direction and to progressively deflect the ring
  • the device of the invention intended for coring and / or deflected drilling is first described, through a wall of a borehole (not shown) which has been cored or drilled beforehand. in an underground formation (not shown)
  • the device of the invention comprises, on the one hand, a corer 1 provided with a coring ring 3 (FIG. 1) having a bore of internal caliber 5 and, on the other hand, an internal guide 7 which is made of a material resistant to abrasion of the ring gear 3, in particular to that of the abrasive elements usually arranged in its internal bore bore 5.
  • the inner guide 7 is arranged inside at least the internal bore bore 5, so that the ring 3 can circulate along the inner guide 7.
  • the inner guide 7 s' extends in front of the ring gear 3, in a coring direction thereof, and is arranged to progressively deflect the ring gear 3, from said longitudinal direction of the previously-formed borehole, to the wall of said borehole.
  • the inner guide 7 is held fixed relative to said wall to give the crown 3 the desired direction of deflection.
  • Said device of the invention may further comprise a destructible element 9 which is detachably fixed in front of the ring 3, in the direction of the coring advance thereof, and which is made of a material chosen to be destroyed by the crown 3 being cored along the deflected path.
  • the destructible element 9 is of a size chosen to pass into the borehole.
  • the destructible element 9 can be made of any known material, composite or not, that the crown 3 can destroy in its passage without it wearing down unnecessarily, but which can keep the guide means 11 and / or or the internal guide 7. It may be for this purpose a block of cement, polyester, a composite material, etc..
  • a guide means 11 arranged to give the deviated path direction that the crown 3 must follow.
  • the destructible element 9 may include means 13 for its selective attachment to the wall of the borehole.
  • Said selective attachment means 13 may comprise an annular sleeve 15 of elastic material, which is mounted on a peripheral side surface portion of the destructible element 9 and whose outside diameter at rest passes freely in the borehole but may be selectively expanded to lock against the wall of the borehole, means 17 being provided to cause this expansion and to preserve it.
  • the annular sleeve 15 is for example fixed by one of its ends 15A to the destructible element 9 while its other end 15B is arranged to be able to slide sealingly along said destructible element 9.
  • the means 17 designed to cause the expansion may comprise an annular chamber 19, between the annular sleeve 15 and the destructible element 9, means 21 for supplying fluid to this annular chamber 19 as well as locking means 23, in particular a valve 23 ball and spring, arranged to selectively lock in the annular chamber 19 the fluid that has been fed.
  • the detachable fastener between the destructible element 9 and the ring gear 3 is arranged to detach itself by relative rotation of the ring gear 3 with respect to the destructible element 9 fixed beforehand to said wall.
  • said detachable attachment between the destructible element 9 and the ring gear 3 may comprise at least one and preferably several pins 25 fixed each time through a nozzle 27, the ring 3, provided as an output of coring fluid on the front face of the crown 3.
  • This pin 25 is advantageously partially tubular and open at its end facing the inside of the ring 3, its inner hollow extending beyond the nozzle 27 to the outside of the crown 3.
  • the pin 25 is closed at its end outside the ring 3. It is arranged to break, during said relative rotation, between the ring 3 and the destructible element 9, there wherein it is hollow, and is preferably of a material that can be removed, for example by wear, from the coring fluid passing through the tubular pin 25 broken and / or in the corresponding nozzle 27.
  • the pin 25 has a thickening 25A at its inner end to the ring 3, so as to be locked in the nozzle 27 when it is pushed in to exit outside of the crown 3 and pass into the destructible element 9.
  • the pin 25 can receive a washer of elastic material 28 and a nut 28A for locking the destructible element 9 on the crown 3.
  • the pin 25 can be made in particular of synthetic material, aluminum or alloy thereof.
  • the pins 25 which serve to detachably fasten between the ring 3 and the destructible element 9 thus clog all the nozzles 27 in the present embodiment of the invention.
  • said guide means 11 is the aforementioned internal guide 7 fixed in the destructible element 9.
  • the inner guide 7 has a rear end 29 inserted coaxially in an inner tube 31 of the corer 1, which is mounted in a known manner in an outer tube 33 of the same corer 1.
  • the guide 7 passes through the internal bore bore 5 and ( Figures 3 and 2) extends first coaxially into the rear end 35 of the destructible element 9 and then curved towards, and up to , the lateral surface 37 of the destructible element 9 where the inner guide 7 is preferably shaped to fit into the outer shape of said lateral surface 37.
  • the rear end 29 of the inner guide 7 and at least a part of it are pierced with a longitudinal channel 39 preferably of the same axis as the longitudinal axis 41 of the corer 1 and the destructible element 9, this longitudinal channel 39 being extended along the same direction to the so upape 23 fastening means 13 to the wall of the borehole.
  • the longitudinal channel 39 thus progressively leaves the internal guide 7 and leaves it because of the curvature of the latter and the rectilinear pattern of said channel 39.
  • said longitudinal channel 39 can be drilled. in the inner guide 7 and destructible element 9 previously assembled.
  • the outer tubes 33 and inner 31 are usually formed each of several successive sections fixed in known manner to one another.
  • the internal space 43 (FIG. 4) of the inner tube 31 may advantageously comprise a piston system 45 which separates this inner space 43 in an upper space 47 in which coring fluid can be brought to controlled pressure from the inside. terrestrial surface, and a lower space 49 in which a different particular fluid can be enclosed before lowering the corer 1 into the borehole.
  • This particular fluid may be a carrot protection fluid, which may be used, as explained hereinafter, to inflate the annular sleeve 15.
  • this particular fluid preferably does not contain particles that could impede the smooth operation. of the valve 23 in particular.
  • This particular fluid is introduced by this path into said lower space 49 before putting the inner tube 31 in the outer tube 33.
  • the inner tube 31 is suspended in known manner in the outer tube 33 by means of a thrust ball system 67 ( Figure 4).
  • Coring fluid can be passed through the stop system 67 and can flow to the gap 69 between the outer and inner tubes 33 through openings 71 and to the top of the piston 45 through an orifice 73 as long as the it was not closed by a ball 75.
  • a first embodiment of the method of the invention may be described using the device of the invention according to the embodiment described above, without however being limited to the use of this device.
  • an internal guide 7 of the type described is arranged in the corer 1, which, before initiating a deviated coring, is arranged inside at least said bore of internal caliber 5, so that the ring 3 can circulate along the inner guide 7.
  • the latter is arranged to extend in front of the ring 3, following a direction of coring advance thereof, and is arranged to progressively deflect the ring 3 from said longitudinal direction of the borehole to the wall thereof.
  • the inner guide 7 is held fixed with respect to the wall of the borehole to provide the crown 3 with a desired deflected path direction.
  • the coring is started with said ring 3 thus equipped and it is allowed to carry out a guide of the ring 3 by its bore of internal gauge 5 along the inner guide 7, to penetrate into said wall and in the formation until to a desired depth following the deflected path.
  • the particular fluid mentioned above can be introduced into the interior space 43 only at the moment when the destructible element 9 and the internal guide 7 are attached to the corer 1, so as to also fill the longitudinal channel 39 to at least the valve 23, and preferably into the annular chamber 19, purging the air that would be there.
  • the corer 1 can then be lowered into the borehole and the destructible element 9 to be fixed to the borehole wall at a location chosen for a deviated core.
  • drilling fluid that is sent under pressure in the corer 1 and can not flow through the nozzles 27 blocked by the pins 25, is forced to pass through the orifice 73 and act on the face of the piston 45.
  • the piston 45 thus urged pushes the particular fluid through the longitudinal channel 39 so that this fluid opens the valve 23 and passes through holes 24 in the annular chamber. 19 to fill the latter and thus push the annular sleeve 15 into a most intimate contact with the wall of the borehole. This blocks in the borehole destructible element 9 and corer 1 attached thereto.
  • the piston 45 releases the pressure of the particular fluid and the valve 23 is closed by the action of its spring as well as possibly by a reverse pressure caused by the annular sleeve 15.
  • the annular chamber 19 remains filled and the annular sleeve 15 remains in blocking contact to maintain fixed in translation and in rotation the position of the destructible element 9 in the borehole.
  • a closing ball 75 (FIG. 4) calibrated to reach the orifice 73 and seal this one.
  • Said particular fluid remaining in the interior space 43 or more precisely in the lower space 49 can serve, if it has been chosen for this purpose, to coat the core as it enters this lower space 49, the surplus this fluid can escape for example through the valve 63 and, by pushing the ball 75, mix with the coring fluid in the gap 69.
  • the curvature that can be given to the inner guide 7 is of a very large radius, and that consequently the length of this inner guide 7 is important, because the deviation that it can give the corer 1 is weak because of the rigidity of the latter.
  • this length will therefore be taken into account in the calculation of that of the interior space 43 in which the internal guide 7 will enter and remain.
  • the inner guide 7 may advantageously have, outside the destructible element 9, a certain flexibility so as to be able to recover slightly when it arrives and is in the inner tube 31.
  • the internal guide 7 opens, from the inside of the destructible element 9 towards the lateral surface thereof, between two stabilizing wings 77. It could equally well lead through such a wing 77.
  • This portion, profiled in the corner by the action of the ring 3 can therefore serve as a guide to reintroduce according to the same deviation the same corer 1 or another or even a drilling device.
  • This same wedge-shaped front portion may, however, be subsequently detached from the wall and / or destroyed to allow for a coring and / or drilling operation deviated to a deeper level in the same starting borehole.
  • said guide means 11, formed in the destructible element 9, is a guide channel 79, in particular of cylindrical tubular shape, one of which end is substantially coaxial with the internal bore bore 5 of the crown 3 and whose path corresponds to the desired deviated path, to open, cut obliquely, the lateral surface of the destructible element 9, as shown in the Figures 5 and 6, so as not to overflow this side surface.
  • an intermediate guide tube 81 can be arranged in the outer tube 33, in order to temporarily accommodate, on the one hand, a removable assembly 83 comprising the internal guide 7 which will cause the desired deviation and, secondly, then an inner tube 31 which will later receive a core.
  • a gear coupling 84 (FIGS. 7 and 22) can be provided between the intermediate and outer tubes 81 to secure them with respect to their rotation.
  • the intermediate tube 81 may include known centering means 85 (FIGS. 8 and 11), having longitudinal passages for fluid.
  • the removable assembly 83 comprises, in order to be able to remove it from the corer 1 (FIG. 9), a hooking stud 86.
  • the inner guide 7 itself comprises a drilling device 87 (FIG. 6) carried by a drill string 89 (FIGS. 7 and 8), and is arranged to be passed through the corer 1 into the intermediate tube 81. through the bore of inner bore 5 and following guide channel 79 so as to be able to drill and penetrate into the wall of the borehole according to said deflected path given by guide channel 79.
  • the drill string 89 has a length chosen so that, when the drill rig 87 is driven into said wall according to a chosen anchoring depth, the drill string 89 is still engaged in at least the bore of internal gauge 5.
  • the drill rig 87 comprises a drilling head 91 and, to rotate it, a hydraulic motor 93 known per se, fed with drilling fluid at its rear end 95, through the drill string 89 hollow, from the outer tube 33.
  • the destructible element 9 (FIGS. 5 and 6) is not equipped with the means 13 shown in FIG. 1 (and described above) for the selective attachment to the borehole wall, and this means is not necessary in said second embodiment. As a result, there is no need to close all nozzles 27 by pins 25 ( Figure 6).
  • the removable assembly 83 which is proposed by way of example for manipulating the inner guide 7 in the intermediate tube 81, may comprise a removable tube 97 arranged to slide in the intermediate tube 81 and in which is housed the drill string 89 of the drill rig 87.
  • the method associated with said second embodiment may then comprise an arrangement, as guiding means 11 in the destructible element 9, of the guide channel 79 arranged as explained above.
  • the drill rig 87 carried by its string of rods 89, through the corer 1 and the internal bore bore 5, so that it follows the guide channel 79, preferably so that the drill head 91 is positioned (as shown in Figure 6) at a still laterally closed position of said guide channel 79 but close to the front end thereof.
  • the drill string 89 to which the drill rig 87 is suspended is held by a breakable pin 99 (FIGS. 7 and 23) which passes through the drill string 89 in a transverse sealing tube 101 which is fixed thereto sealing.
  • the breakable pin 99 can be retained on both sides in the removable tube 97 which is arranged (indirectly) to abut against the inside of the ring gear 3.
  • the body of the motor 93 is prevented from rotating by its attachment to the gear train.
  • rods 89 which, in the exemplary embodiment, comprises on its external surface two longitudinal grooves 103 cooperating with two inner projections 105 of the removable tube 97.
  • the removable tube 97 itself is prevented from rotating for example by a spring pawl 106 ( Figure 9) that it comprises and which cooperates for this purpose with a longitudinal groove 107 cut in the intermediate tube 81 locked in rotation on its side by the gear coupling 84 in the outer tube 33 which does not rotate during this phase of operation.
  • a spring pawl 106 Figure 9 that it comprises and which cooperates for this purpose with a longitudinal groove 107 cut in the intermediate tube 81 locked in rotation on its side by the gear coupling 84 in the outer tube 33 which does not rotate during this phase of operation.
  • Drilling or coring fluid is sent under pressure into the corer 1 from its posterior end 109 (FIG. 9) and passes into the intermediate tube 81 which it simultaneously pushes against (directly or indirectly) against the crown 3.
  • This fluid passes along the attachment pin 86 and the spring pawl 106, through passages 111, and through a selector piston 113 held by a breakable pin 115 in a position shown in Figure 9.
  • the fluid flows through a nozzle 117 and inside the removable tube 97 and ( Figure 8) arrives at the posterior end of the drill string 89 which is arranged in a kind of piston in the removable tube 97 and is provided with a nozzle 117 for restricting the passage of the fluid.
  • Said fluid pushes by its pressure on the drill string 89 and, traversing this drill string 89, reaches ( Figure 7) the motor 93 which it rotates to rotate the drill head 91.
  • the breakable pin 99 is broken under a controlled pressure of the fluid and the drill rig 87 can then advance to the wall of the borehole.
  • the drill string 89 has a length selected so that when the drill rig 87 is pressed into said wall according to a chosen anchoring depth, the drill string 89 is still engaged in at least the bore of internal caliber 5 of the crown 3.
  • an outer sleeve 119 is slidably and sealingly mounted on the drill string 89, in a position depending on the chosen anchoring depth, and is fixed to said train 89, in the drawn position, by a breakable pin 121 which passes through the train 89 into another transverse sealing tube 122 similar to the previous tube 101.
  • This outer sleeve 119 closes in this position one or more orifices 125 formed through the wall of the drill string 89.
  • the destructible element 9 (FIGS. 5 and 6) is fixed in the borehole by the drill rig 87 driven in the manner of a nail into the training (position not shown).
  • a sudden sudden rise in pressure of the fluid is caused at this moment and it acts on the selector piston 113 (FIG. 9) with a force which causes the rupture of its breakable pin 115 and the displacement of said selector piston 113 in the room he occupies, towards the crown 3, until opening a passage for said fluid through orifices 127 which lead it into the space 129 between the outer tubes 33 and intermediate 81, so that this fluid arrives by this path to the nozzles 27 to be able to start l deflected core operation itself.
  • the ring gear 3 is rotated by means of the outer tube 33, the element destructible 9 being locked in rotation by the drill rig 87 stuck in the formation. This breaks the pins 25. It retains said rotation and is pushed forward the corer 1 which can only follow the deviated path given by the drill string 89 and the drill rig 87, destroying the part of the destructible element 9 and said guide channel 79 that the ring 3 encounters and penetrates into said wall and into the formation around the borehole to a desired depth.
  • the internal space 131 (FIGS. 10 and 11) of the inner tube 31 may be filled beforehand and in a known manner with another fluid, in particular for the protection of the core that will enter it.
  • the front end (FIG. 10) of this interior space 131 may then be provided with a piston 133 for distributing this other fluid around the perimeter of the core.
  • the piston 133 may comprise a valve 135 whose rod 137 bears on the top of the core at the beginning of the entry thereof into the inner tube 31 and whose displacement releases a passage for the fluid to through the distribution channels of the piston 133 which open to the top of the carrot, as the carrot enters.
  • said interior space 131 At the rear end of said interior space 131 (FIG. 11), it may be provided, for example, a ball 138 arranged to allow the other fluid, contained in the inner space 131 and in surplus when the core penetrates into it, to be able to to escape and to prevent the pressure coring fluid coming from outside this interior space 131 enters it.
  • a ball 138 arranged to allow the other fluid, contained in the inner space 131 and in surplus when the core penetrates into it, to be able to to escape and to prevent the pressure coring fluid coming from outside this interior space 131 enters it.
  • said guide means 11 in the destructible element 9, is also a guide channel 79 whose end is substantially coaxial with the inner bore bore 5 of the ring 3 and whose path corresponds to the desired deviated path.
  • the inner guide 7 also comprises a drill rig 87t carried by a drill string 89t and arranged through the corer 1 and the internal bore bore 5 and following the guide channel 79 towards said wall.
  • the drill rig 87t and its drill string 89t are mounted in the corer 1 so that the machine 87t projects from a predetermined distance out of the ring 3 into the guide channel 79.
  • the drill head 91t the machine 87t could also be rotated by a motor as in the second embodiment.
  • said drill head 91t does not have a motor but is coupled by the drill string 89t to the ring 3 of the corer 1 as explained below.
  • the drill rig 87t and its drill string 89t form a removable assembly 83t that is installed in the intermediate tube 81 to come directly or indirectly to stop against a stop in the ring 3, so that that the drilling head 91t is at the desired distance ahead of the crown 3.
  • a spring pawl 139 ( Figure 15), which is part of the removable assembly 83t, engages in a longitudinal groove 141 cut in the tube intermediate 81 so that it, when rotated by the outer tube 33 via the gear coupling 84, rotates the removable assembly 83t and thus the drill head 91t which is part thereof and is also attached to it for rotation.
  • the supply means 21 may comprise, besides the valve 23 and the through-holes 24 described previously in the first embodiment, a conduit 143 arranged parallel to the longitudinal axis 41 and connecting for the fluid the interior of the guide channel 79 to the valve 23.
  • the guide channel 79 is closed by a hermetic plug 145 disposed temporarily in front of the drill head 91t ( Figure 14).
  • the method of the invention applied in the context of this third Embodiment of the corer 1 may include the following steps, some of which are essential to the invention and others are only necessary for understanding (as is also the case for the other forms and embodiments).
  • a corer 1 is mounted as shown in FIGS. 13 to 17 and the guiding channel 79 arranged as explained above is arranged as guide means 11 in the destructible element 9.
  • the drill rig 87t carried by the drill string 89t, is arranged, in particular, through the core drill 1 and the bore of internal gauge 5 and following the guide channel 79 towards the said wall. drill.
  • the drill rig 87t is fixed to the corer 1, so that it projects from a determined distance out of the ring gear 3 into the guide channel 79. This attachment will presently be the result of the pressure of the drilling / coring fluid. on the removable assembly 83t, pushing the latter against the inside of the ring 3.
  • the corer 1 can then be lowered into the borehole and positioned where the deflected core is desired.
  • the destructible element 9 is then attached to said wall of the borehole, as already described, by inflating the sleeve 15 with the particular fluid subjected to a sufficient pressure sent into the corer 1 from the derrick. , in particular using a coring / drilling fluid pressing on the particular fluid.
  • the ring 3 drives in its stroke the drill rig 87t which precedes it, the core drilling fluid / drilling forward the train of rods 89t.
  • the drill head 91t drills and first removes the plug 145 and can then drill the wall of the borehole along said deflected path given by the guide channel 79.
  • the ring 3 then follows the deflected path given by the drill string. 89t and the drill rig 87t, penetrating into said wall and into the formation to a desired depth.
  • a membrane 147 which, when intact in its drawn position, prevents the fluid or fluids from passing towards the outside of the destructible element 9.
  • the fluid can be given a momentary overpressure capable of piercing this membrane 147 so that, from this moment, fluid can escape at this point and rise towards the crown 3
  • the detachable assembly 83t which comprises the drilling rig 87t can be removed by means of the pin 86 and replace this assembly 83t, as in the case of the second embodiment above, by a usual inner core tube 31 (FIGS. 18 to 20) already described.
  • the drill rig when the drill rig has penetrated a desired depth into the wall of the borehole, it may be chosen to reduce the pressure of the coring fluid in the core core 1 so that the drill rig 87t is no longer pushed forward in the formation and the head 91t no longer drills or barely. Under these conditions, if the ring 3 continues to progress in the destructible element 9 and / or in the formation, the removable assembly 83t enters the corer 1 in the intermediate tube 81.
  • the ratchet system 139 and longitudinal groove 141 can be arranged so that from a retracted position of the removable assembly 83t, the pawl 139 comes out of this groove 141.
  • the head 91t is then no longer rotated and does not progress any further. everything in training. If the ring 3 is still driven in rotation and pushed forward, it can progress while being guided by the drill rig 87t and / or its drill string 89t.
  • the cut core will be fully formed. and not a first portion consisting of debris of the destructible element 9 and a second portion consisting of said formation with, between these two parts, an interface surface oblique to the coring direction.
  • the stabilizing wings 77 of the destructible element 9 are shown extending parallel to the longitudinal axis 41. However, they can be of helical shape.
  • This apparatus 151 may comprise in the small annular chamber 155 sensors of different types known in the art to make detections and / or particularly electrical measurements on a core that enters the corer 1.
  • the large annular chamber 153 is intended to receive apparatus for detecting, measuring and / or recording or even transmitting data to the operators, connected to these sensors, not shown.
  • the particular fluid aforesaid may then be selected and / or arranged to have electrical characteristics matching the operation of these sensors, as is known.
  • the means 11 or guide channel 79 is mainly represented in the form of a tube in a major part of its length. It can however be any shaped element to give the result described.

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  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP03711719A 2002-03-27 2003-03-25 Procede et dispositif de carottage et/ou forage devie Expired - Lifetime EP1492935B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE200200223 2002-03-27
BE2002/0223A BE1014730A3 (fr) 2002-03-27 2002-03-27 Procede et dispositif de carottage et/ou forage devie.
PCT/BE2003/000054 WO2003080987A1 (fr) 2002-03-27 2003-03-25 Procédé et dispositif de carottage et/ou forage dévié

Publications (2)

Publication Number Publication Date
EP1492935A1 EP1492935A1 (fr) 2005-01-05
EP1492935B1 true EP1492935B1 (fr) 2006-05-31

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EP03711719A Expired - Lifetime EP1492935B1 (fr) 2002-03-27 2003-03-25 Procede et dispositif de carottage et/ou forage devie

Country Status (8)

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US (1) US7021404B2 (no)
EP (1) EP1492935B1 (no)
AT (1) ATE328183T1 (no)
BE (1) BE1014730A3 (no)
CA (1) CA2480473C (no)
DE (1) DE60305679D1 (no)
NO (1) NO334884B1 (no)
WO (1) WO2003080987A1 (no)

Cited By (1)

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CN110130830A (zh) * 2019-05-24 2019-08-16 中国科学院地质与地球物理研究所 基于钻井液压差的推靠式旋转导向装置

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BE1014730A3 (fr) 2002-03-27 2004-03-02 Halliburton Energy Serv Inc Procede et dispositif de carottage et/ou forage devie.
US8522897B2 (en) 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7571780B2 (en) 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US8360174B2 (en) 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US7721826B2 (en) 2007-09-06 2010-05-25 Schlumberger Technology Corporation Downhole jack assembly sensor
ITTO20110913A1 (it) * 2011-10-13 2013-04-14 Trevi Spa Procedimento per la costruzione di pali di grande diametro e utensile di scavo
US9051799B2 (en) * 2012-09-06 2015-06-09 Baker Hughes Incorporated Preload and centralizing device for milling subterranean barrier valves
US20140166366A1 (en) * 2012-12-13 2014-06-19 Smith International, Inc. Single-trip lateral coring systems and methods
WO2015130396A1 (en) * 2014-02-28 2015-09-03 Longyear Tm, Inc. Core drilling tools with retractably lockable driven latch mechanisms
CN112377131B (zh) * 2020-10-29 2022-09-06 中煤科工集团西安研究院有限公司 一种近水平定向连续取芯装置与方法
CN112647881B (zh) * 2020-12-28 2022-03-04 山东大学 一种车载式全自动隧道围岩取芯系统及方法
CN113464080B (zh) * 2021-08-11 2022-06-21 晋能控股装备制造集团有限公司寺河煤矿 一种煤层钻孔随钻取芯的方法及装置

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GB575685A (en) * 1943-11-11 1946-02-28 John Adolphus Zublin Improvements in or relating to well drilling
NO168962C (no) * 1987-03-16 1992-04-22 Sintef Retningsstyrt bor
DE3902869C1 (no) * 1989-02-01 1990-04-12 Eastman Christensen Co., Salt Lake City, Utah, Us
US5148875A (en) * 1990-06-21 1992-09-22 Baker Hughes Incorporated Method and apparatus for horizontal drilling
US6202752B1 (en) * 1993-09-10 2001-03-20 Weatherford/Lamb, Inc. Wellbore milling methods
US5826651A (en) * 1993-09-10 1998-10-27 Weatherford/Lamb, Inc. Wellbore single trip milling
BE1014730A3 (fr) 2002-03-27 2004-03-02 Halliburton Energy Serv Inc Procede et dispositif de carottage et/ou forage devie.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110130830A (zh) * 2019-05-24 2019-08-16 中国科学院地质与地球物理研究所 基于钻井液压差的推靠式旋转导向装置

Also Published As

Publication number Publication date
US7021404B2 (en) 2006-04-04
BE1014730A3 (fr) 2004-03-02
EP1492935A1 (fr) 2005-01-05
NO334884B1 (no) 2014-06-30
CA2480473A1 (en) 2003-10-02
ATE328183T1 (de) 2006-06-15
DE60305679D1 (de) 2006-07-06
CA2480473C (en) 2010-12-21
NO20044641L (no) 2004-12-13
WO2003080987A1 (fr) 2003-10-02
US20050072598A1 (en) 2005-04-07

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