EP4028626A1 - Method and device for large-diameter borehole or digging of wells following a plurality of inclinations - Google Patents
Method and device for large-diameter borehole or digging of wells following a plurality of inclinationsInfo
- Publication number
- EP4028626A1 EP4028626A1 EP20785791.3A EP20785791A EP4028626A1 EP 4028626 A1 EP4028626 A1 EP 4028626A1 EP 20785791 A EP20785791 A EP 20785791A EP 4028626 A1 EP4028626 A1 EP 4028626A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- basket
- blades
- borehole
- drilling
- cutting
- 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- Withdrawn
Links
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- 238000005553 drilling Methods 0.000 claims abstract description 98
- 238000005520 cutting process Methods 0.000 claims abstract description 69
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 8
- 238000013519 translation Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 description 42
- 244000000626 Daucus carota Species 0.000 description 14
- 235000002767 Daucus carota Nutrition 0.000 description 14
- 229910003460 diamond Inorganic materials 0.000 description 10
- 239000010432 diamond Substances 0.000 description 10
- 238000003860 storage Methods 0.000 description 7
- 230000001066 destructive effect Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
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- 238000009412 basement excavation Methods 0.000 description 5
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- 238000011160 research Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
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- 238000012544 monitoring process Methods 0.000 description 2
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- 239000002689 soil Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 241001272720 Medialuna californiensis Species 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- 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
-
- 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
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- 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
- E21B7/002—Drilling with diversely driven shafts extending into the borehole
Definitions
- the present invention falls within the field of non-destructive drilling and / or digging and coring, carried out for example in argillaceous rocks to make wells and / or to sample the rock.
- the invention can in particular be implemented for construction work, very long-term geological storage of radioactive waste from nuclear installations, or more generally for all types of digging work such as the digging of chimney or well connections. .
- large diameter drilling methods involve the use of core bits which destroy the ground to be drilled in a destructive manner.
- the walls of the excavated rocks are partly damaged.
- large diameter borehole is meant in the following a borehole the minimum diameter of which is greater than or equal to 60 centimeters, or even greater than or equal to 1 meter.
- the walls of the core may be partially damaged and have an irregular exterior surface.
- Patent application FR 2 915 232 describes the use of a drill bit provided with several blades, for rapidly drilling very deep wells without risk of clogging of the wellbore.
- a small diameter core with sharp edges can be extracted from the drilled ground via an internal cavity of the bit.
- the rocks in the vicinity of the wellbore remain damaged by the bit blades.
- Patent application FR 2 974 141 filed in the name of the Applicant describes a non-destructive drilling method capable of reducing the disturbances of the rocks surrounding the wellbore and the disturbances of the core walls. This method comprises the insertion into the ground of a containment basket having a longitudinal slot capable of radially deforming, then the actuation of a spark gap contained in the basket to burst the rocks of the portion of ground confined in the basket. .
- core extraction after bursting is mainly done by recovering the rocks extracted by gravity.
- This method of extraction can only be used for boreholes extending along a horizontal axis or very slightly inclined.
- the desired process must be inexpensive and compact, while guaranteeing a high level of safety and a good quality of finish for the walls of the wellbore.
- the desired method does not require a significant mechanical effort for the control of the drilling instruments and the extraction of the cores.
- a first object of the invention is a method for producing a borehole, in particular a large diameter borehole, along a drilling axis in a field, comprising the steps of: i) digging a gap in the ground, the gap being of substantially cylindrical shape centered on the drilling axis, ii) insertion of a side wall of a cutting basket in the gap, the wall surrounding the blades of the basket cutting, iii) actuation of the blades to detach a portion of land confined within the side wall, said portion extending to the blades from a head wall of the basket, iv) evacuation of the cutting basket and extraction of the portion of land, so as to dig the borehole.
- the cutting basket used for drilling thus comprises a cutting device using the blades, the blades preferably being located at the heart of the device.
- the cutting device is preferably placed on a longitudinal axis of the basket.
- the actuation of the blades after inserting the basket into the gap, allows the detachment of an entire portion of land which retains a shape corresponding to that of the body of the basket.
- the portion of land is extracted from the land by evacuating the cutting basket (typically by lifting the basket along the drilling axis, in a direction opposite to the drilling direction), which has the effect of increasing the depth of the hole. drilling along the drilling axis.
- a first advantage of this process is that it is not necessary to explode the rocks contained inside the basket in order to dig the borehole and detach the rocks to be extracted. Cutting the terrain by the blades is a non-destructive option for the rocks in the terrain. A wellbore is thus obtained whose walls are regular and the damage to the rocks adjacent to the wellbore is reduced, as well as the damage to the rocks of the core formed by the portion of land evacuated.
- An additional advantage is that the actuation of the blades does not require a great deal of power.
- a pressure around 100-200 bar for the cylinder fluid may be sufficient to move a blade through clay rock. In harder rock, this cutting pressure can be greater. It is not necessary to move the blades so that they cross the width of the portion of land to be cut, as a small movement of the blades can be enough to create a breaking surface that extends inside the basket. cutting, allowing the portion of the rock to be extracted (core) to be separated from its environment.
- the blades When actuated, the blades are moved radially outward from the drilling axis, so as to protrude from the internal wall and detach the portion of land.
- Steps i) to iv) are repeated according to a number of iterations depending on a distance between the head wall of the cutting basket and an axial position of the blades along the drilling axis.
- the method further comprises a preliminary step of carrying out an exploration drilling along the drilling axis, an internal diameter of the interstice in the ground being greater than a diameter of the exploration drilling, the drilling exploration and the gap being concentric.
- the exploration borehole includes an internal wall and, in step ii), the blades are positioned inside the exploration borehole and opposite the internal wall.
- the drilling axis has, relative to a surface of the ground, an angle of inclination of between 10 and 90 degrees, preferably between 45 and 90 degrees, even more preferably between 80 and 90 degrees.
- a second object of the invention is a cutting basket for carrying out a borehole, in particular a large diameter borehole, in a field, according to a method as defined above, the basket comprising:
- the basket of the invention is, in an optional and non-limiting manner, supplemented by the following characteristics taken alone or in combination:
- the side wall has a diameter of between 600 and 1500 millimeters, preferably a diameter equal to one meter.
- the basket comprises a complementary attachment with a guide rod, so as to be moved in translation along the guide rod.
- At least one blade has a cutting edge which admits a plane parallel to the head wall as a plane of symmetry.
- a third object of the invention is a device for producing a borehole, in particular a large diameter borehole, along a drilling axis in a field, the device comprising:
- a digging ring configured to dig an interstice of substantially cylindrical shape in the ground
- an actuator configured to control a movement of the blades of the basket relative to the side wall of the basket
- Figure 1 shows the steps of a drilling production method according to an exemplary embodiment of the invention
- Figure 2a schematically illustrates a first state of land during the process shown in Figure 1;
- Figure 2b schematically illustrates a second state of land during the process shown in Figure 1;
- Figure 2c schematically illustrates a third state of land during the process shown in Figure 1;
- Figure 3a is a schematic view of a cutting basket with its cutting device, during drilling
- Figure 3b is a schematic view from below of said cutting basket
- Figure 4 illustrates elements of an exemplary blade support of said cutting basket, in a blade deployment position.
- a large-diameter drilling device comprises a drilling machine for handling digging rings and cutting baskets.
- the drilling machine (bearing the reference 7 in the figures) has for example a power included between 40 and 60 kilowatts and can exert a torque of between 400 and 600 decanewton per meter. It preferably comprises an electric motor suitable for underground environments.
- the drill is configured to drive the following tools in translation along a drilling axis and in rotation on themselves:
- the crown 4 has a substantially cylindrical shape, the side wall of the cylinder being closed on the side of the head wall of the crown and open on the side of the advancement base 40 allowing the opening of the gap.
- the crown 4 is a diamond crown whose side wall has a length of between 50 and 100 centimeters.
- the diamond-coated advancement base 40 cuts through the rocks of the ground when the crown 4 is rotated and brought into contact with the ground.
- the crown wheel can be rotated by the drill motor.
- the cutting section of the diamond-coated advancement ground 40 is small, preferably 2 to 10 millimeters (for example between 4 and 5 millimeters) to minimize damage to the rocks of the ground surrounding the excavated gap.
- the outside diameter of the side wall of the crown 4 bears the reference D1 in the figures. It will be noted that the diameter D1 corresponds to the diameter of the wall of the wellbore, once the drilling is completed.
- the diameter D1 is preferably between 600 and 1500 millimeters, even more preferably between 800 and 1500 millimeters, and is here equal to 1000 millimeters.
- the crown 4 comprises a centering device 41 located on a longitudinal axis of the crown.
- the longitudinal axis of the crown extends from the head wall of the crown, inside the side wall.
- the centering device 41 is concentric with the side wall and allows the ring 4 to be guided along the exploration drilling.
- the external diameter of the centralizer bears the reference D2; the diameter D2 is smaller than the diameter D1.
- the diameter D2 is between 250 and 300 millimeters. In this example, the diameter D2 is equal to 250 millimeters.
- An advantage of exploration drilling of diameter greater than 250 millimeters is to do without an intermediate drilling. Exploration drilling is then carried out by a core barrel.
- the cutting basket 2 comprises a basket body with a side wall bearing the reference 20 in the figures, of cylindrical shape, and a head wall 21 closing the side wall 20.
- the side wall is open on the side opposite to the head wall, and has an outer diameter substantially equal to D1 and a thickness less than or equal to the cutting section of the crown 4.
- the edge opposite the head wall can be inserted into a gap made by the crown 4.
- the basket 2 further comprises blades 22 arranged inside the side wall 20 and means 23 for moving the blades, an example of which will be detailed below.
- the cutting basket 2 is very similar to the crown 4 except for the edge opposite the head wall, this edge not being diamond-coated in the basket 2.
- the basket 2 also advantageously comprises a centering device 24 to the size of the exploration borehole.
- the drill 7 comprises means for evacuating the cutting basket 2 allowing extraction of the basket 2 when the latter contains rocks to be extracted.
- the discharge means comprise a guide rod 6, one end of which is attached to a drill string support of the drill 7, and the other end of which allows the removable attachment of a tool.
- the tool attached to the rod may be the basket 2 or the crown 4 or possibly a core barrel or other tools useful for carrying out the drilling.
- the basket 2 and the ring 4 preferably each have a plurality of hooks on the guide rod 6 (not shown).
- the drilling machine 7 is for example provided with a mast making it possible to move forward or backward a drill string carrying the rod 6 along the drilling axis.
- the sounder 7 further comprises a rotation head for rotating the tool installed on the guide rod.
- the drilling device also comprises an actuator 5 which can cooperate with the means 23 for moving the blades (for example with jacks), in order to move the blades with sufficient mechanical force to cut rocks from the ground.
- an actuator 5 which can cooperate with the means 23 for moving the blades (for example with jacks), in order to move the blades with sufficient mechanical force to cut rocks from the ground.
- the actuator 5 is a separate pump from the sounder 7, preferably a hand pump.
- the pump 5 can be placed in fluid communication with one or more jacks 23 of the basket 2.
- flexible cables 50 are arranged along drilling, from the surface to the basket 2, for the hydraulic supply of the jacks 23.
- the drilling device further comprises:
- the core barrel 8 of any known type, for carrying out an exploration borehole the diameter of which is less than that of the large diameter borehole hollowed out by the crown 4 and the basket 2.
- the core barrel 8 has a diamond crown at its end .
- the diameter of the diamond crown here is between 100 and 250 millimeters;
- a reamer (not shown) for expanding the exploration borehole dug using the 8 core barrel.
- the reamer has a centralizer for the diameter of the exploration borehole.
- the reamer can be guided along the exploration borehole, which avoids deviations when digging the intermediate borehole.
- the reamer further comprises a diamond head, the outside diameter of which corresponds to the diameter D2 of the centralizers of the basket 2 and of the ring 4.
- the intermediate drilling therefore has a final diameter substantially equal to the diameter D2.
- the reamer can be omitted in the case where the core barrel 8 alone allows the digging of the exploration borehole of diameter D2 without intermediate drilling, in particular in the case where the diameter of the exploration borehole is greater than or equal to 250. millimeters;
- a platform for the elevation of the drill 7, in order to give sufficient space for the recovery of the crown 4 or the basket D1.
- a platform can include wooden sleepers with a cross distribution, promoting good stability of the drill.
- the sleepers are preferably orthogonal to the main axis of the body of the drill;
- FIG. 1 shows an example of a method for producing a borehole, this method being able to be implemented by a device for carrying out a borehole as described above.
- the drilling is carried out over a length L in a ground 1.
- the drilling is carried out in a surface soil S.
- the angle of inclination a of the axis A with respect to the surface S - or with respect to a plane representing the average level of the ground - is between about 10 and 90 degrees, for example, between 45 and 90 degrees, for example, between 80 and 90 degrees.
- the axis A is here vertical, the angle a having a measure of 90 degrees.
- Preliminary steps for digging the exploration borehole can be implemented as needed: installation of the platform and / or installation of the compressor and vacuum cleaner and / or ignition of monitoring cameras installed in the basket cutting 2.
- an exploratory borehole 3 is dug along the drilling axis A, using the core barrel 8.
- the core barrel 8 is connected to the drill string of the sounder 7.
- the digging is done. either an exploration drilling followed by the realization of the intermediate drilling with the reamer, or directly an exploration drilling with the diameter of the centralizers of the crown or basket.
- the state of the ground after digging 100 of the exploration drilling is shown in Figure 2a.
- the exploration borehole 3 extends along the length L.
- the borehole 3 comprises an internal wall 30 of substantially cylindrical shape.
- the final diameter D2 of the exploration borehole was chosen to match the diameters of the respective centralizers of crown 4 and basket 2.
- An advantage of such an exploration drilling is to guide the cutting basket 2 during the subsequent digging of the large diameter borehole.
- the extracted carrots have, for example, a length of between 20 and 100 centimeters.
- the analysis results can be used to determine the composition of the ground or to adjust the power of the digging tools and / or a mechanical force communicated to the blades of the cutting basket.
- the method continues with a step 200 of digging a gap 10 to the size of the side wall 20 of the cutting basket 2.
- the term “interstice” is understood to mean a thin cavity formed in the free surface of the wellbore.
- the gap 10 is here cylindrical.
- the inner and outer walls of the gap extend substantially parallel to the drilling axis.
- the digging ring 4 is fixed to the end of the guide rod 6, then the centralizer 41, which is integral with the rest of the ring 4, is inserted through the free end of the exploration borehole 3.
- the centralizer preferably abuts against the internal wall 30 of the exploration borehole.
- the crown 4 is then actuated so that the diamond edge 40 digs the gap 10 in the ground.
- the head wall of the ring 4 progresses until it touches the level of the wellbore.
- the diamond edge 40 being thin, the rocks surrounding the interstice are little damaged and the finish of the walls of the interstice is clean.
- Figure 2b illustrates the terrain after digging 200 of the diameter D1 gap, before the crown 4 is withdrawn from the terrain.
- the length E of the gap along axis A is greater than or equal to the length d provided for the core which will then be extracted.
- the length E of the gap is preferably between 30 and 70 centimeters. This length is here 50 centimeters.
- the crown 4 is brought up via the drill string and the crown 4 is removed from the end of the drill string.
- the insertion 300 of the cutting basket 2 is then carried out to proceed with the cutting and the recovery of the carrot.
- the portion of land to be extracted during this step, which constitutes the core, is delimited by the internal wall of the interstice 10.
- the core to be extracted extends radially between the exploration borehole 3 and the internal wall of the interstice 10.
- the cutting basket 2 is placed on the guide rod 6, then lowered along the drilling axis A, until the head wall 21 of the basket 2 is in abutment against the bottom of the wellbore.
- the basket 2 comprises blades 22 arranged inside the side wall 20 of the basket 2.
- the blades 22 are configured to be able to be inserted into the exploration borehole 3 which is made. along the drilling axis A, when the blades 22 are in the retracted position.
- the blades 22 are located inside the inner wall 30 of the exploration borehole 3.
- FIG. 2c illustrates the state of the ground and of the drilling device, once the cutting basket 2 is inserted into the gap 10.
- the complete borehole is shown in dotted lines in FIG. 2c, as well as successive plans corresponding to the digging phases of the well, as the borehole is dug along the axis A until it reaches the length L.
- the cutting basket 400 is released relative to the guide rod 6.
- the basket 2 cutting device can then move in translation. under the effect of a stress, but remains integral with the rod 6 in rotation.
- An advantage of this embodiment is to allow, during the subsequent detachment of the core from the rest of the ground, the head wall 21 to follow the slight elevation of the core inside the body of the basket 2. As it will be seen below, the blades 22 must indeed penetrate into a part of the core in order to detach the latter. Raising the head wall along the guide rod prevents damage to the head wall 21 and blocking the top surface of the loose core.
- the cutting basket 2 is not released in translation along the rod 6 before the actuation of the blades 22.
- the rotation head can be ordered to raise the head wall in a controlled manner, prior to detachment of the core.
- this prevents the detached core from being blocked by the head wall of the basket.
- the blades 22 are then actuated in step 500 to detach the portion of land corresponding to the core.
- the blades 22 move from a retracted position to an extended position and penetrate the rocks of the portion of land 11 extending between the head wall 21 and the blades.
- the blades 22 move radially away from the drilling axis and crack the rock.
- the deployment and penetration of the blades 22 has the effect of creating a rupture surface.
- a rupture surface propagates for example radially from a cutting edge of the blades to the side wall 20. The portion of land 11 is thus detached from the rest of the land, while remaining confined in the basket 2.
- the blades 22 extend radially outward (away from the drilling axis A) from their retracted position to their deployed position.
- the blades 22 then protrude at least partially from the internal wall 30 of the exploration borehole 3.
- the blades 22 create a rupture surface extending outwardly of the exploration borehole 3.
- the rupture surface extends. from exploration borehole 3 towards interstice 10.
- the fracture surface is for example perpendicular to the drilling axis A, if the blades 22 attack the rock perpendicular to said axis.
- the blades 22 have sufficient hardness to, on the one hand, not yield or bend in the face of the mechanical resistance of the rock, and on the other hand, allow the portion of land 11 to be lifted by raising the basket, without yielding. under the weight of the carrot carried out.
- the actuation 500 of the blades can be achieved by any means of displacement capable of providing sufficient mechanical force to penetrate the rock and generate the fracture surface.
- the blades cooperate with pistons actuated by jacks, preferably hydraulic, to move the blades to the deployed position.
- the cutting basket is evacuated in a step 600 to recover the carrot.
- the basket loaded with the carrot is preferably retrieved from an unloading platform.
- the extraction of the portion of land 11 has the effect of increasing the depth of the wellbore along the A axis.
- the basket is raised here by the drill 7.
- the basket loaded with the core must be raised slowly and carefully to avoid blocking, breaking or falling of the core.
- the extracted core which corresponds to the portion of land 11, has the shape of a cylinder crossed by a central channel the size of the exploration borehole.
- the cutting basket 2 and the carrot may have a total weight exceeding one tonne.
- the blades must therefore be particularly resistant to the weight of the core and the guide rod must support the weight of the basket and the core.
- the guiding system of the basket along the guide rod must be very strong to prevent a fall.
- the blades After checking that the core is correctly positioned on the unloading platform, the blades are returned to the retracted position. The separation of basket 2 and carrot is thus permitted. The carrot being placed on the platform, the basket is raised and the centralizer 24 is, if necessary, withdrawn from the central channel of the carrot.
- the surfaces of the core are much sharper and less fragile than in the case where the rocks forming the core would have been detached using a more invasive instrument such as a spark gap. .
- the evacuation 600 of the rocks from the core, confined in the basket 2 between the head wall 21 and the blades 22, allows the digging of the borehole to begin.
- a borehole is dug in the ground, of a shape complementary to that of the extracted core.
- the well for example, has approximately the shape of a cylinder centered on the drilling axis A, of length d.
- the length d corresponds to the distance along axis A between the head wall 21 and the longitudinal location of the blades 22 on said axis.
- the steps 200 to 600 can be repeated in a step 700 according to a predetermined number of iterations depending on the distance d.
- the number of iterations is typically equal to the ratio of the total length L desired for drilling, divided by the distance d.
- the depth of the borehole which here corresponds to the length L, may be several tens of meters, preferably between 10 and 20 meters.
- Figure 3a is a close-up view of the cutting basket 2 of Figures 2a to 2c according to an exemplary embodiment, in an actuating position of the blades 22 of the basket, while the basket is positioned in the gap 10 of the field 1.
- the blades 22 are located under the head wall 21, on the inner side of the side wall 20.
- the blades 22 are mounted in the vicinity of the axis A on a blade support 25 placed at a lower end of the centralizer. 24.
- the blades 22 have a retracted position (not shown) and a deployed position shown in Figure 3a.
- the blade holder 25 is shaped so that it can be inserted into the exploration borehole 3 when the blades are in the retracted position.
- the blade support 25 also contains means for moving the blades, here two hydraulic jacks 23.
- each of the blades 22 includes an upper surface and a lower surface, joined on the radially outer side by a cutting edge 220.
- the upper and lower surfaces are parallel to the head wall 21 of the basket, and the jacks 23 are configured to cause the movement of the blades 22 parallel to said head wall and perpendicular to the drilling axis A.
- FIG. 3b a perspective view from below of the basket 2.
- the blades 22 each have, for example, the shape of a half-moon and are arranged on either side of the axis. of the basket; said axis corresponds to the axis of the drilling when the basket is positioned in the ground to carry out the drilling.
- the blade support 25 has openings on the sides for the passage of the blades 22.
- the cutting basket 2 also includes cameras 26 positioned for real-time monitoring of the actuation of the blades and the cutting of the carrot in the field.
- the basket comprises one camera 26 per blade, the cameras being disposed slightly above the blades on the centralizer.
- the flexible cables 60 used for actuating the jacks 23 can also be used for supplying power to the cameras and receiving data from them.
- a cutting basket allowing the implementation of the drilling method described above may have a number of blades greater than two, for example four blades distributed regularly around the perimeter of the blade support.
- the means for moving the blades 22 include return means 231, hydraulic cylinders 23 and pistons 232 associated with the hydraulic cylinders.
- Figure 4 illustrates a deployed position of the blades 22, in which the blades are spaced apart from each other.
- the cutting edges 220 of the blades protrude from the outer wall of the blade support 25, along a length LL.
- the return means 231 are here formed of a spring, the two ends of which are each fixed to one of the leaves 22.
- the spring 231 works in compression when the leaves 22 move radially away from their retracted position.
- Each of the two blades is associated with a hydraulic cylinder 23 positioned at the base of the blade, on the side opposite the cutting edge.
- Each cylinder 23 includes a piston 232 comprising a fluid chamber.
- the fluid chambers are in fluid communication with the pump 5 via the flexible cables 60.
- the fluid used to move the pistons is, for example, oil pressurized by the pump 5.
- the jacks 23 exert a force on the blades which exceeds the return force of the spring 231.
- the blades move away radially to a distance. pressure drop which corresponds to the generation of the fracture surface in the rocks confined in the basket, and to the penetration of the blades.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1909899A FR3100559B1 (en) | 2019-09-09 | 2019-09-09 | Method and device for large-diameter drilling or for digging wells along several inclinations |
PCT/FR2020/051552 WO2021048496A1 (en) | 2019-09-09 | 2020-09-09 | Method and device for large-diameter borehole or digging of wells following a plurality of inclinations |
Publications (1)
Publication Number | Publication Date |
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EP4028626A1 true EP4028626A1 (en) | 2022-07-20 |
Family
ID=69172918
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20785791.3A Withdrawn EP4028626A1 (en) | 2019-09-09 | 2020-09-09 | Method and device for large-diameter borehole or digging of wells following a plurality of inclinations |
Country Status (3)
Country | Link |
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EP (1) | EP4028626A1 (en) |
FR (1) | FR3100559B1 (en) |
WO (1) | WO2021048496A1 (en) |
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CN113959761B (en) * | 2021-10-21 | 2023-07-18 | 黄河水利委员会黄河水利科学研究院 | Embankment drilling sampling device |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2185746A1 (en) * | 1972-05-24 | 1974-01-04 | Bourlier Jacque | Coring-type drill bit cage - with core separating and retaining levers |
US4854396A (en) * | 1988-12-21 | 1989-08-08 | The United States Of America As Represented By The Secretary Of The Army | Pivoting cutter for ice coring auger |
FR2915232B1 (en) | 2007-04-23 | 2009-06-05 | Total Sa | TREPAN FOR DRILLING A WELL AND METHOD FOR DRESSING THE SAME. |
US8499856B2 (en) * | 2010-07-19 | 2013-08-06 | Baker Hughes Incorporated | Small core generation and analysis at-bit as LWD tool |
FR2974141B1 (en) | 2011-04-14 | 2013-05-03 | Irsn | NON-DESTRUCTIVE DRILLING METHOD AND DEVICE |
US9249631B2 (en) * | 2011-09-30 | 2016-02-02 | Terex Usa, Llc | Extendable pilot bit for barrel cutter |
KR101379822B1 (en) * | 2013-11-18 | 2014-03-31 | 한국지질자원연구원 | Mineral mining kit for single crystal collecting |
-
2019
- 2019-09-09 FR FR1909899A patent/FR3100559B1/en active Active
-
2020
- 2020-09-09 EP EP20785791.3A patent/EP4028626A1/en not_active Withdrawn
- 2020-09-09 WO PCT/FR2020/051552 patent/WO2021048496A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2021048496A1 (en) | 2021-03-18 |
FR3100559B1 (en) | 2021-09-17 |
FR3100559A1 (en) | 2021-03-12 |
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