EP1687505B1 - Fluid jet drilling tool - Google Patents
Fluid jet drilling tool Download PDFInfo
- Publication number
- EP1687505B1 EP1687505B1 EP04817283A EP04817283A EP1687505B1 EP 1687505 B1 EP1687505 B1 EP 1687505B1 EP 04817283 A EP04817283 A EP 04817283A EP 04817283 A EP04817283 A EP 04817283A EP 1687505 B1 EP1687505 B1 EP 1687505B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distance holder
- shaped inner
- excavating device
- stream
- trumpet shaped
- 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.)
- Not-in-force
Links
- 239000012530 fluid Substances 0.000 title claims description 41
- 238000005553 drilling Methods 0.000 title description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 29
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 10
- 239000003082 abrasive agent Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 230000005291 magnetic effect Effects 0.000 description 5
- 239000008188 pellet Substances 0.000 description 4
- 230000005298 paramagnetic effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910000816 inconels 718 Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/002—Down-hole drilling fluid separation systems
-
- 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
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Definitions
- the invention relates to a distance holder for use as a part of an excavating device arranged to generate a stream of an abrasive fluid to be jetted against a geological formation thereby excavating a hole in the geological formation.
- the invention also relates to an excavating device, for excavating a hole in a geological formation, comprising such a distance holder.
- WO-A-02/34653 shows such an excavating device.
- the described excavating device uses a jet of fluid under pressure in which abrasive particles are mixed to erode the material of a surface in order to generate a hole in said surface.
- the jet is placed under an angle relative to the advancement direction of the excavating device in the hole, and is rotatably operated inside the hole in order to create the hole. This is shown to result in a hole with a heap-shaped center part on the bottom of the hole, as a result of the rotation of the abrasive jet.
- the excavating device comprises a distance holder in the form of an L-shaped bracket, in order to ensure a pre-determined distance of the nozzle to the bottom of the hole.
- the bracket contacts the hole bottom surface in the part of the hole bottom surface that is diametrically opposed to where the abrasive jet stream impacts the hole at that very moment. When the abrasive jet leaves the nozzle outlet it enters a free space.
- US-A-5.887.667 discloses a device for drilling a borehole in an earth formation by means of erosion due to a fluid jet stream ejected against the borehole bottom by a hydraulic nozzle, whereby the lower end of the device is provided with a hollow shroud into which the jet stream debouches.
- a distance holder for use as a part of an excavating device arranged to generate a stream of an abrasive fluid to be jetted against a geological formation thereby excavating a hole in the geological formation, the distance holder having a wall with a trumpet shaped inner surface section to be facing the geological formation there where it is to be excavated, whereby a recess is formed in the trumpet shaped inner surface section of the wall thereby defining an opening in the trumpet shaped inner surface section to allow the stream of the abrasive fluid to pass from within the recess through the trumpet shaped inner surface section to impact the geological formation.
- an excavating device for excavating a hole in a geological formation which excavating device comprises:
- the trumpet shaped inner surface section is suitable to more or less match a heap-shaped bottom profile of the hole. Rotation of the excavating tool inside the hole results in the abrasive jet stream to rotate in the hole such that it is scanned along the hole. When placed over a heap-shaped bottom profile, the distance holder thus provides an improved degree of alignment of the hole bottom profile in front of the rotating abrasive jet stream.
- the opening in the trumpet shaped inner surface section is preferably defined by a recess that is formed in the trumpet shaped inner surface of the wall of the distance holder, whereby the nozzle is arranged to discharge in the recess.
- the recess When placed in the hole in the geological formation over the heap-shaped bottom profile, the recess defines a tunnel for the stream of abrasive fluid to pass through.
- the recess thus facilitates confinement of the stream of abrasive fluid so that a relatively high density is maintained.
- the effectiveness of the energy present in the stream in excavating is increased.
- the abrasive jet stream now better follows the bottom surface than it would have when the jet would be discharge in open space. This increases the efficiency of the abrasive jet stream.
- US patent 2,779,571 discloses a pellet impact drill bit, having a trumpet-shaped foot part.
- a nozzle is located up-hole above the trumpet-shaped foot part for releasing impact pellets in open space.
- the foot part has a fully removed segment through which the impact pellets can pass. This removed segment is not capable of guiding or concentrating the stream of impact pellets.
- the present invention in contrast, features a recess in the form of a cavity formed in the inner surface of the distance holder's wall such that a covered passage is formed between the bottom of the hole and the recess in the wall for the abrasive jet stream to pass through.
- the abrasive jet stream can thus strike the heap-shaped bottom of the hole in a glancing direction, thereby abrading this surface while maintaining its heap-shaped bottom profile.
- the trumpet shape in the distance holder of the present invention can be approached by any one of a number of conical shapes, preferably a straight cone or one having a concave side contour, or an outwardly tapered contour with outwardly increasing opening angles.
- the trumpet shaped inner surface converges in a centre area, whereby the opening extends to include the centre area.
- the centre area is best intersected by the axis of rotation, so that the excavating device can rotate about the centre area and ensure that the formation in the centre of the hole is impacted by the abrasive jet.
- the opening is an elongate shaped opening of which the direction of elongation is alignable with the discharge direction of the nozzle. This allows for a small angle of impact between the stream of abrasive fluid and the heap-shaped bottom of the hole.
- a peripheral outer surface section of the distance holder is connected to the trumpet shaped inner surface section via a rim area, whereby preferably the opening in the trumpet shaped inner surface extends to the rim area.
- the inner surface can contact the least excavated sections of the bottom of the hole and thereby prevent longitudinal advancement of the excavating device along the axis of rotation.
- the arrangement of the opening in the trumpet shaped inner surface section ensures that further excavating of the hole can only occur if all of the bottom hole area is eroded.
- mechanical jamming of the excavating tool due to unequal distributed excavation within the hole is avoided.
- the escape of abrasive fluid from the recess is further facilitated by optional provision of one or more slots in the rim area, preferably opening into a slot provided in the outer surface section, for drainage of the abrasive fluid.
- one or more slots in the rim area preferably opening into a slot provided in the outer surface section, for drainage of the abrasive fluid.
- the distance holder has an outer surface profile that is essentially peripheral in a lower part and that converges upward toward the body.
- a larger space between the bore wall and the excavating device is provided. Due to this larger space, the velocity of the fluid stream after it impacted with the geological formation is reduced, such that undesired washing out of the hole wall is reduced.
- Figure 1 shows an excavating device 1 according to the invention provided with a distance holder 8 in accordance with the invention.
- the excavating device 1 is inserted into a hole 2 in a geological formation, the hole 2 having a wall 3 and a generally heap shaped hole bottom surface 4.
- the excavating device 1 is rotatable inside the hole along a rotation axis A.
- a proximal end of the excavating device 1 can be coupled onto a distal end of a standard drill string reaching into the hole 2.
- the excavating device 1 has a first fluid channel 5, typically in fluid communication with an internal longitudinal channel in the drill string.
- the first fluid channel 5 serves to transport drilling fluid through, to a mixing chamber 6 where abrasive particles are mixed with the drilling fluid to form an abrasive fluid that subsequently is ejected through a nozzle 7 in the form of an abrasive jet stream 9.
- the nozzle 7 is oriented in the excavating device 1 to give the stream 9 of the abrasive fluid has at least an radial velocity component and one parallel to the rotation axis A.
- the effective gauge of the excavating device 1 is determined by the radial reach of the abrasive jet.
- the abrasive jet stream 9 impacts the geological formation which is thereby abraded such that the hole 2 is excavated.
- a distal end of the excavating device 1 is formed by the distance holder 8, shown in detail in different views in Figs. 2A to 2C.
- the distance holder is firmly connectable to an abrasive jet stream generating tool part by means of connector 17, here provided in the form of a bayonet catch. If desired, other connector systems can be used instead such as a threaded connector as exemplified in Fig. 5.
- the distance holder 8 ensures, inter alia, a predetermined distance between a discharge outlet of nozzle 7 and the bottom surface 4.
- the distance holder 8 has a wall with a trumpet shaped inner surface section 12 facing the bottom surface 4 of the hole 2 in the geological formation.
- the trumpet-shape converges in a centre area forming a central apex 19.
- the distance holder 8 is connectable to the abrasive jet stream generating tool part such that the axis of rotation runs through the central apex 19.
- the trumpet shaped inner surface section 12 is provided with a recess 15 defining an elongate opening 16 for allowing the abrasive jet stream 9 to pass through after having been discharged from the nozzle 7.
- the recess forms a cavity inside the wall of the trumpet shaped inner surface section 12, of which the opening 16 forms an exit opening into the space bound by the trumpet shaped inner surface section 12. (Cavity-forming recess 15 and opening 16 are best viewed in Fig. 2B.)
- the elongate opening 16 extends to include the centre area including apex 19.
- the centre area can be provided with mechanical rock-cutting elements.
- the nozzle 7 is arranged to discharge into the recess 15.
- the recess 15 thus functions as a discharge channel.
- the abrasive jet stream 9 discharged from the nozzle 7 through the discharge channel 15, passes the trumped shaped inner surface section 12 through the opening 16.
- the nozzle 7 has its outlet opening arranged such that the apex 19 is located inside the nozzle 7.
- the opening 16 in the trumpet shaped inner surface section 12 has an elongated shape, suitably an oval shape, parabolic shape, or elliptical shape.
- the direction of elongation of the opening is aligned with the discharge direction of the nozzle 7.
- the abrasive jet stream 9, as it passes through the opening 16, strikes glancingly along the heap-shaped bottom surface 4 of the hole, thereby abrading this surface 4.
- the excavating tool is rotated in the hole, such that the hole is symmetrically excavated.
- a peripheral outer surface section 18 of a general outer surface 10 is present at a radius such that a part of the abrasive jet stream 9 can reach radially outward a little bit further than the peripheral outer surface 18.
- the peripheral outer surface section 18 is connected to the trumpet shaped inner surface section 12 via a rim area 13, and extends around the distance holder's centre area and the axis of rotation.
- the rim area 13 forms substantially a support ring functioning as a contact end surface to support any weight on bit.
- the geological formation is abraded also at a distance corresponding to where the rim area 13 is so that the excavating device 1 can progress without being blocked by unabraded geological formation.
- the inner surface 12 of the distance holder may come in almost full contact with the hole bottom surface 4, for instance after an excavating interruption.
- the opening 16 extends to the peripheral outer surface 18.
- the preferably elongated shape of the opening 16 thus is a truncated elongated shape, suitably a truncated oval shape, a truncated parabolic shape, or a truncated elliptical shape.
- slots 14 in the contact end surface 13 There may be provided three slots 14 in the contact end surface 13, which are also called junk slots. A different number of junk slots is also possible.
- the slots align with slots or recesses provided in the peripheral outer surface 18, for drainage of the abrasive fluid.
- the recess 15 in the trumpet shaped inner surface 12 of the distance holder ends in of the slots 14.
- Fig. 3 a schematic view of the lower end of the excavating device 1 with the distance holder according to the invention is shown.
- the trumpet shaped inner surface 12 of the distance holder 8 is shown and a typical trumpet shaped bottom surface 4. Furthermore the nozzle outlet 7 is shown.
- the abrasive jet 9 is discharged in a direction substantially parallel to the trumpet shaped inner surface 12 of the distance holder 8.
- the discharge channel 15 and/or the opening 16, in combination with the heaped shaped bottom 4 may form an expanding duct which acts as a diffuser allowing for divergence of the abrasive jet stream 9.
- An advantage of allowing some divergence of the abrasive jet stream 9 is that this facilicates a distance holder of a shorter length measured in the direction of the axis of rotation. This can be understood as follows. With little or no divergence, the abrasivitiy of the jet stream remains high over a relatively large distance from the nozzle outlet.
- the angle between discharge direction from the nozzle and the advancement direction of the excavating device in the hole has to be chosen smaller leading to an increase in the length of the distance holder relative to its diameter.
- a divergence of minimally 4° is preferably allowed for, more preferably a divergence of minimally 6°.
- the corresponding angle ⁇ between the recess wall and the discharge direction of the nozzle 7 is half the divergence angle, and should therefore preferably not be less than 2°, more preferably not less than 3°.
- the divergence angle preferably does not exceed 30° to insure that the flow of the abrasive fluid in the abrasive jet stream 9 follows the recess contour in order to avoid the occurrence of, for instance, stalling of the abrasive jet stream 9.
- Angle ⁇ should therefore preferably not exceed 15° in order to avoid stalling or other unnecessary disturbances of the flow of the abrasive jet stream 9 through the recess 15.
- the nozzle 7 is preferably made of a wear resistant, hard material, such as preferably Tungsten Carbide.
- the distance holder is preferably made of an impact resistant material such as impact resistant steel, or preferably a non-magnetisable and/or high-strength and/or high-temperature resistant and/or corrosion resistant material, such as a high-strength, high-temperature and corrosion resistant nickel-chromium alloy.
- a nickel-chromium alloy within the following compositional range (in wt.%) has proven particularly suitable: Aluminium 0.2 - 0.8 Boron 0.006 max Carbon 0.08 max Chromium 17 - 21 Cobalt 1.0 max Copper 0.3 max Iron Balance Manganese 0.35 max Molybdenum 2.8 - 3.3 Nickel + Cobalt 50 - 55 Niobium + Tantalum 4.75 - 5.5 Phosphorus 0.015 max Silicon 0.35 max Sulphur 0.015 max Titanium 0.65 - 1.15
- Such an alloy is commercially available under the name Inconel 718, in accordance with American Metals Societey specifications. The alloy can be age-hardened.
- the nozzle discharge direction can be kept almost parallel to the trumpet shaped inner surface of the distance holder, such that the hit zone of the abrasive jet covers at least the full radial length of said trumpet shaped surface. Consequently, the abrasive jet discharge channel 15 in the trumpet shaped inner surface wall of the distance holder 8 runs from at least the center on axis A of the trumpet shaped inner surface 12 to at least the full radius of the distance holder. Both the alignment of the discharge channel 15 through the internal profile and the trumpet shape of that internal profile of the distance holder ensure that all of the bottom hole area is exposed to the abrasive water jet stream during one rotation of the abrasive jet stream.
- the excavating device 1 may be provided with a separation system for separating abrasive material out of the mixture flowing downstream impacting the geological formation.
- a separation system for separating abrasive material out of the mixture flowing downstream impacting the geological formation.
- a separation system is provided with a magnetic body 11 for attracting magnetic abrasive particles in the fluid, such that they can be recirculated back into the mixing chamber 6.
- the lower fluid velocity achieved by the converging outside surface 10 is also advantageous in embodiments that are not provided with a separation system, in that undesired washing out of the hole wall 3 by the abrasive particles still present in the fluid is reduced.
- the distance holder 8 is provided with one or more slots 14, as described above, at least one of the slots is preferably arranged such that the stream flowing out of the excavating device is directed along the separation system.
- the flow through the slots is hereby directed preferably such that the distance between the fluid flow and the separating system is minimized.
- mechanical cutting elements are arranged on the distance holder in either of the disclosed embodiments, for supporting the hole making capacity of the excavating tool.
- one or more of the group consisting of the trumpet-shaped inner surface section 12, the outer surface 10, and the contact end surface 13, or the rim area can be provided with cutting elements.
- cutting elements are optionally arranged in the forward directed wall of the junk slots 14 in relation to the direction of rotation.
- the excavating device is rotated and when a junk slot 14 is arranged in the contact surface 13 it is possible that cuttings or particles falling out of the wall of the excavated hole get caught between the junk slot 14 and the bore hole wall 3. This may hamper the rotation of the excavating device 1 or may damage the distance holder 8.
- By providing cutting elements in the junk slots these particles could be cut when they get jammed into the junk slot.
- Cutting elements on the outer surface can provide a finishing of the bore hole wall. For some sensors, which are run into the hole after the drilling, this might be preferred if a good contact between the bore wall hole and these devices is required.
- FIG. 4 shows a side view
- Fig. 5 a cross sectional view
- the alternative distance holder 38 is firmly connectable to the abrasive jet stream generating tool part by means of a connector in the form of a threaded connection 27.
- the alternative distance holder is an assembly of parts each being made of a particularly suitable material.
- an outer part 25 for direct contact with the geological formation and taking mechanical impacts, and a relatively wear resistant inner part 26 through which the recess 15 is predominantly provided.
- the outer part can suitably be made of an impact resistant material such described above in relation with the distance holder of Figs 2A to 2C.
- the inner part 26 is formed as an insert which can be held in place between the outer part 25 and the abrasive jet stream generating tool part.
- the inner part 26 can be made of an abrasion-resistive hard material, preferably a Tungsten-Carbide, to avoid as much as possible wear resulting from the abrasive jet stream 9 which glancingly passes along the inner part 26. It can be made of the same material as nozzle 7. Because of the presence of the outer part 25, the inner part 26 can be relatively brittle, and the outer part 25 can be somewhat less wear resistant than in an embodiment where the distance holder is formed out of a unitary part.
- an abrasion-resistive hard material preferably a Tungsten-Carbide
- a distance ring 28 is provided to maintain a distance in the axial direction between the inner part 26 and the abrasive jet stream generating tool part. Herewith it is achieved that any load is transmitted exclusively between the outer part 25 and the abrasive jet stream generating tool part, such that the inner part 26 does not excert a load on the nozzle 7.
- the distance ring 28 also serves to accommodate a slight forward movement of the nozzle 17 that may result from the force associated with the pressure drops in the drilling fluid imposed by the first and second nozzles.
- the separating system which includes magnet 11 as described above with reference to Fig. 1, is here provided excentrically with respect to axis A.
- a para-magnetic attractor body 30 is provided adjacent the mixing chamber 6 on a side thereof opposite that of the magnet 11.
- the para-magnetic attractor body 30 is magnetisable under the magnetic field generated by magnet 11, and facilitates the release of para-magnetic abrasive particles into the mixing chamber 6.
- An annular cover ring 29 is provided to enclose the magnetic attractor body 30. The cover ring 29 can be held in position against the abrasive jet stream generating tool part by the distance holder 38.
- a similar construction can be provided in the embodiment of Figs. 1 and 2.
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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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
- The invention relates to a distance holder for use as a part of an excavating device arranged to generate a stream of an abrasive fluid to be jetted against a geological formation thereby excavating a hole in the geological formation.
- The invention also relates to an excavating device, for excavating a hole in a geological formation, comprising such a distance holder.
-
WO-A-02/34653 - The excavating device according to the prior art comprises a distance holder in the form of an L-shaped bracket, in order to ensure a pre-determined distance of the nozzle to the bottom of the hole. The bracket contacts the hole bottom surface in the part of the hole bottom surface that is diametrically opposed to where the abrasive jet stream impacts the hole at that very moment. When the abrasive jet leaves the nozzle outlet it enters a free space.
- This may lead to misalignment of the abrasive jet stream, and thereby undesired erosion into the bore hole wall, and a less effective use of the abrasive jet and the energy contained therein.
-
US-A-5.887.667 discloses a device for drilling a borehole in an earth formation by means of erosion due to a fluid jet stream ejected against the borehole bottom by a hydraulic nozzle, whereby the lower end of the device is provided with a hollow shroud into which the jet stream debouches. - According to the invention, there is provided a distance holder for use as a part of an excavating device arranged to generate a stream of an abrasive fluid to be jetted against a geological formation thereby excavating a hole in the geological formation, the distance holder having a wall with a trumpet shaped inner surface section to be facing the geological formation there where it is to be excavated, whereby a recess is formed in the trumpet shaped inner surface section of the wall thereby defining an opening in the trumpet shaped inner surface section to allow the stream of the abrasive fluid to pass from within the recess through the trumpet shaped inner surface section to impact the geological formation.
- There is also provided an excavating device for excavating a hole in a geological formation, which excavating device comprises:
- a body rotatable inside the hole along a rotation axis;
- a nozzle arranged on the body to jet a stream of an abrasive fluid onto a surface in the geological formation in order to generate the hole, wherein the stream has at least a radial velocity component and one parallel to the rotation axis; and
- a distance holder arranged on the body to ensure a predefined distance between the nozzle outlet and the surface; wherein
- the distance holder has a trumpet shaped inner surface section facing the geological formation, which trumpet shaped inner surface section is provided with an opening for allowing the stream to pass through.
- The trumpet shaped inner surface section is suitable to more or less match a heap-shaped bottom profile of the hole. Rotation of the excavating tool inside the hole results in the abrasive jet stream to rotate in the hole such that it is scanned along the hole. When placed over a heap-shaped bottom profile, the distance holder thus provides an improved degree of alignment of the hole bottom profile in front of the rotating abrasive jet stream.
- The opening in the trumpet shaped inner surface section is preferably defined by a recess that is formed in the trumpet shaped inner surface of the wall of the distance holder, whereby the nozzle is arranged to discharge in the recess.
- When placed in the hole in the geological formation over the heap-shaped bottom profile, the recess defines a tunnel for the stream of abrasive fluid to pass through. The recess thus facilitates confinement of the stream of abrasive fluid so that a relatively high density is maintained. Herewith the effectiveness of the energy present in the stream in excavating is increased.
- As the space between the trumpet shaped inner surface of the distance holder and the bottom surface of the hole is limited, the abrasive jet stream now better follows the bottom surface than it would have when the jet would be discharge in open space. This increases the efficiency of the abrasive jet stream.
- It is remarked that
US patent 2,779,571 discloses a pellet impact drill bit, having a trumpet-shaped foot part. A nozzle is located up-hole above the trumpet-shaped foot part for releasing impact pellets in open space. The foot part has a fully removed segment through which the impact pellets can pass. This removed segment is not capable of guiding or concentrating the stream of impact pellets. - The present invention, in contrast, features a recess in the form of a cavity formed in the inner surface of the distance holder's wall such that a covered passage is formed between the bottom of the hole and the recess in the wall for the abrasive jet stream to pass through. The abrasive jet stream can thus strike the heap-shaped bottom of the hole in a glancing direction, thereby abrading this surface while maintaining its heap-shaped bottom profile.
- The trumpet shape in the distance holder of the present invention can be approached by any one of a number of conical shapes, preferably a straight cone or one having a concave side contour, or an outwardly tapered contour with outwardly increasing opening angles.
- Preferably, the trumpet shaped inner surface converges in a centre area, whereby the opening extends to include the centre area. The centre area is best intersected by the axis of rotation, so that the excavating device can rotate about the centre area and ensure that the formation in the centre of the hole is impacted by the abrasive jet.
- Preferably, the opening is an elongate shaped opening of which the direction of elongation is alignable with the discharge direction of the nozzle. This allows for a small angle of impact between the stream of abrasive fluid and the heap-shaped bottom of the hole.
- Typically, a peripheral outer surface section of the distance holder is connected to the trumpet shaped inner surface section via a rim area, whereby preferably the opening in the trumpet shaped inner surface extends to the rim area. Herewith it is achieved that abrasive fluid present in the recess can escape from the recess even if the opening provided in the trumpet shaped inner surface section is fully covered by the heap-shaped bottom profile in the hole. The risk of obstructing the outflow of the abrasive jet stream from the nozzle is thus reduced.
- Moreover, because the opening is provided in the trumpet shaped inner surface section, the inner surface can contact the least excavated sections of the bottom of the hole and thereby prevent longitudinal advancement of the excavating device along the axis of rotation. Thus, the arrangement of the opening in the trumpet shaped inner surface section ensures that further excavating of the hole can only occur if all of the bottom hole area is eroded. Herewith mechanical jamming of the excavating tool due to unequal distributed excavation within the hole is avoided.
- The escape of abrasive fluid from the recess is further facilitated by optional provision of one or more slots in the rim area, preferably opening into a slot provided in the outer surface section, for drainage of the abrasive fluid. Herewith it is avoided that the end of the recess facing away from the nozzle is closed off by the side wall of the hole under excavation.
- Preferably, the distance holder has an outer surface profile that is essentially peripheral in a lower part and that converges upward toward the body. Herewith a larger space between the bore wall and the excavating device is provided. Due to this larger space, the velocity of the fluid stream after it impacted with the geological formation is reduced, such that undesired washing out of the hole wall is reduced.
- These and other advantages of the invention will be further elucidated by way of example and in conjunction with the accompanying drawings wherein
- Figure 1 schematically shows a cross section of an excavating device and distance holder according to the invention;
- Figures 2A, 2B and 2C show schematic perspective views of a distance holder of an excavating device according to the invention;
- Figure 3 shows a schematic cross sectional view for elucidating the angle between the nozzle discharge direction and the inner surface of the distance holder;
- Figure 4 shows a schematic side view of a second embodiment of an excavating device with a distance holder according to the invention;
- Figure 5 shows a schematic cross section of the excavating device and distance holder of Figure 4.
- In the figures, like reference numerals refer to like parts.
- Figure 1 shows an
excavating device 1 according to the invention provided with adistance holder 8 in accordance with the invention. Theexcavating device 1 is inserted into ahole 2 in a geological formation, thehole 2 having awall 3 and a generally heap shapedhole bottom surface 4. - The
excavating device 1 is rotatable inside the hole along a rotation axis A. A proximal end of theexcavating device 1 can be coupled onto a distal end of a standard drill string reaching into thehole 2. Theexcavating device 1 has afirst fluid channel 5, typically in fluid communication with an internal longitudinal channel in the drill string. Thefirst fluid channel 5 serves to transport drilling fluid through, to amixing chamber 6 where abrasive particles are mixed with the drilling fluid to form an abrasive fluid that subsequently is ejected through anozzle 7 in the form of an abrasive jet stream 9. - The
nozzle 7 is oriented in theexcavating device 1 to give the stream 9 of the abrasive fluid has at least an radial velocity component and one parallel to the rotation axis A. The effective gauge of theexcavating device 1 is determined by the radial reach of the abrasive jet. - The abrasive jet stream 9 impacts the geological formation which is thereby abraded such that the
hole 2 is excavated. - A distal end of the
excavating device 1 is formed by thedistance holder 8, shown in detail in different views in Figs. 2A to 2C. The distance holder is firmly connectable to an abrasive jet stream generating tool part by means ofconnector 17, here provided in the form of a bayonet catch. If desired, other connector systems can be used instead such as a threaded connector as exemplified in Fig. 5. Thedistance holder 8 ensures, inter alia, a predetermined distance between a discharge outlet ofnozzle 7 and thebottom surface 4. - The
distance holder 8 has a wall with a trumpet shapedinner surface section 12 facing thebottom surface 4 of thehole 2 in the geological formation. The trumpet-shape converges in a centre area forming a central apex 19. Thedistance holder 8 is connectable to the abrasive jet stream generating tool part such that the axis of rotation runs through the central apex 19. - The trumpet shaped
inner surface section 12 is provided with arecess 15 defining anelongate opening 16 for allowing the abrasive jet stream 9 to pass through after having been discharged from thenozzle 7. The recess forms a cavity inside the wall of the trumpet shapedinner surface section 12, of which theopening 16 forms an exit opening into the space bound by the trumpet shapedinner surface section 12. (Cavity-formingrecess 15 andopening 16 are best viewed in Fig. 2B.) - The
elongate opening 16 extends to include the centre area including apex 19. Alternatively, the centre area can be provided with mechanical rock-cutting elements. - Referring also to Fig. 1, the
nozzle 7 is arranged to discharge into therecess 15. Therecess 15 thus functions as a discharge channel. The abrasive jet stream 9 discharged from thenozzle 7 through thedischarge channel 15, passes the trumped shapedinner surface section 12 through theopening 16. - Preferably, the
nozzle 7 has its outlet opening arranged such that the apex 19 is located inside thenozzle 7. - The
opening 16 in the trumpet shapedinner surface section 12 has an elongated shape, suitably an oval shape, parabolic shape, or elliptical shape. The direction of elongation of the opening is aligned with the discharge direction of thenozzle 7. The abrasive jet stream 9, as it passes through theopening 16, strikes glancingly along the heap-shapedbottom surface 4 of the hole, thereby abrading thissurface 4. At the same time, the excavating tool is rotated in the hole, such that the hole is symmetrically excavated. - A peripheral
outer surface section 18 of a generalouter surface 10 is present at a radius such that a part of the abrasive jet stream 9 can reach radially outward a little bit further than the peripheralouter surface 18. The peripheralouter surface section 18 is connected to the trumpet shapedinner surface section 12 via arim area 13, and extends around the distance holder's centre area and the axis of rotation. Therim area 13 forms substantially a support ring functioning as a contact end surface to support any weight on bit. However, since at least part of the abrasive jet 9 reaches further than the peripheralouter surface section 18, the geological formation is abraded also at a distance corresponding to where therim area 13 is so that the excavatingdevice 1 can progress without being blocked by unabraded geological formation. - The
inner surface 12 of the distance holder may come in almost full contact with the holebottom surface 4, for instance after an excavating interruption. To avoid a full closing off of theopening 16 in the trumpet shapedinner surface section 12 and consequently hampering of the passage of the stream 9 of the abrasive fluid, theopening 16 extends to the peripheralouter surface 18. In this case, the preferably elongated shape of theopening 16 thus is a truncated elongated shape, suitably a truncated oval shape, a truncated parabolic shape, or a truncated elliptical shape. Even when the heap shapedbottom 4 completely coversopening 16, therecess 15 always forms a tunnel to the periphery of theexcavating device 1 through which the abrasive fluid can be discharged. - There may be provided three
slots 14 in thecontact end surface 13, which are also called junk slots. A different number of junk slots is also possible. The slots align with slots or recesses provided in the peripheralouter surface 18, for drainage of the abrasive fluid. Therecess 15 in the trumpet shapedinner surface 12 of the distance holder ends in of theslots 14. During an excavating operation, the cuttings resulting from the excavating together with the abrasive jet stream 9, are discharged throughslots 14. - In Fig. 3 a schematic view of the lower end of the
excavating device 1 with the distance holder according to the invention is shown. The trumpet shapedinner surface 12 of thedistance holder 8 is shown and a typical trumpet shapedbottom surface 4. Furthermore thenozzle outlet 7 is shown. The abrasive jet 9 is discharged in a direction substantially parallel to the trumpet shapedinner surface 12 of thedistance holder 8. - Angle α defined as the top angle between a cross sectional contour of the trumpet shaped
inner surface 12 and the axis of rotation A is generally selected between 25° and 55°. In one embodiment, described in detail below with reference to in Fig. 5, α equals 34.5°. Angle β ofnozzle 7 with axis A should generally lie between α and α - 15°. In the embodiment of Fig. 5, β = 21.8° which corresponds to α - 12.7°. The resulting angle γ which is half of the top angle of the heap shaped bottom profile is generally between β + 18° and β + 25°, depending on how much of the nozzle opening is on the upstream side of the axis A. - Moreover, the
discharge channel 15 and/or theopening 16, in combination with the heapedshaped bottom 4, may form an expanding duct which acts as a diffuser allowing for divergence of the abrasive jet stream 9. An advantage of allowing some divergence of the abrasive jet stream 9 is that this facilicates a distance holder of a shorter length measured in the direction of the axis of rotation. This can be understood as follows. With little or no divergence, the abrasivitiy of the jet stream remains high over a relatively large distance from the nozzle outlet. In order to assure that the hole is not excavated too much beyond the peripheral outer surface of the excavating tool, the angle between discharge direction from the nozzle and the advancement direction of the excavating device in the hole has to be chosen smaller leading to an increase in the length of the distance holder relative to its diameter. - Thus, a divergence of minimally 4° is preferably allowed for, more preferably a divergence of minimally 6°. The corresponding angle δ between the recess wall and the discharge direction of the
nozzle 7 is half the divergence angle, and should therefore preferably not be less than 2°, more preferably not less than 3°. The divergence angle preferably does not exceed 30° to insure that the flow of the abrasive fluid in the abrasive jet stream 9 follows the recess contour in order to avoid the occurrence of, for instance, stalling of the abrasive jet stream 9. Angle δ should therefore preferably not exceed 15° in order to avoid stalling or other unnecessary disturbances of the flow of the abrasive jet stream 9 through therecess 15. - The
nozzle 7 is preferably made of a wear resistant, hard material, such as preferably Tungsten Carbide. The distance holder is preferably made of an impact resistant material such as impact resistant steel, or preferably a non-magnetisable and/or high-strength and/or high-temperature resistant and/or corrosion resistant material, such as a high-strength, high-temperature and corrosion resistant nickel-chromium alloy. A nickel-chromium alloy within the following compositional range (in wt.%) has proven particularly suitable:Aluminium 0.2 - 0.8 Boron 0.006 max Carbon 0.08 max Chromium 17 - 21 Cobalt 1.0 max Copper 0.3 max Iron Balance Manganese 0.35 max Molybdenum 2.8 - 3.3 Nickel + Cobalt 50 - 55 Niobium + Tantalum 4.75 - 5.5 Phosphorus 0.015 max Silicon 0.35 max Sulphur 0.015 max Titanium 0.65 - 1.15 - With one or more of the features as set out above, the nozzle discharge direction can be kept almost parallel to the trumpet shaped inner surface of the distance holder, such that the hit zone of the abrasive jet covers at least the full radial length of said trumpet shaped surface. Consequently, the abrasive
jet discharge channel 15 in the trumpet shaped inner surface wall of thedistance holder 8 runs from at least the center on axis A of the trumpet shapedinner surface 12 to at least the full radius of the distance holder. Both the alignment of thedischarge channel 15 through the internal profile and the trumpet shape of that internal profile of the distance holder ensure that all of the bottom hole area is exposed to the abrasive water jet stream during one rotation of the abrasive jet stream. - Advantageously, the excavating
device 1 may be provided with a separation system for separating abrasive material out of the mixture flowing downstream impacting the geological formation. Typically such a separation system is provided with amagnetic body 11 for attracting magnetic abrasive particles in the fluid, such that they can be recirculated back into the mixingchamber 6. - It is then of particular advantage that, above the peripheral
outer surface section 18, theoutside surface 10 of thedistance holder 8 converges towards the body of theexcavating device 1. Herewith, a larger space is created between the body of theexcavating device 1 and thehole wall 3. As a consequence the velocity of the fluid reduces, so that the separation of the magnetic abrasive particles from the fluid is facilitated. - The lower fluid velocity achieved by the converging outside
surface 10 is also advantageous in embodiments that are not provided with a separation system, in that undesired washing out of thehole wall 3 by the abrasive particles still present in the fluid is reduced. - In an embodiment wherein the
distance holder 8 is provided with one ormore slots 14, as described above, at least one of the slots is preferably arranged such that the stream flowing out of the excavating device is directed along the separation system. - If the separation system is not positioned concentrically, in the bore hole the flow through the slots is hereby directed preferably such that the distance between the fluid flow and the separating system is minimized.
- An example of a suitable separation system is provided in International publication
WO-A-02/34653 EP2004/051407 - Optionally, mechanical cutting elements are arranged on the distance holder in either of the disclosed embodiments, for supporting the hole making capacity of the excavating tool. In particular, one or more of the group consisting of the trumpet-shaped
inner surface section 12, theouter surface 10, and thecontact end surface 13, or the rim area, can be provided with cutting elements. - In a special embodiment cutting elements are optionally arranged in the forward directed wall of the
junk slots 14 in relation to the direction of rotation. The excavating device is rotated and when ajunk slot 14 is arranged in thecontact surface 13 it is possible that cuttings or particles falling out of the wall of the excavated hole get caught between thejunk slot 14 and thebore hole wall 3. This may hamper the rotation of theexcavating device 1 or may damage thedistance holder 8. By providing cutting elements in the junk slots, these particles could be cut when they get jammed into the junk slot. - Cutting elements on the outer surface can provide a finishing of the bore hole wall. For some sensors, which are run into the hole after the drilling, this might be preferred if a good contact between the bore wall hole and these devices is required.
- Alternative embodiments of a distance holder 38 and excavating device are shown in Figs. 4 and 5, whereby Fig. 4 shows a side view and Fig. 5 a cross sectional view. Parts having reference numerals that have already been introduced above will not be described in detail again.
- The alternative distance holder 38 is firmly connectable to the abrasive jet stream generating tool part by means of a connector in the form of a threaded
connection 27. The alternative distance holder is an assembly of parts each being made of a particularly suitable material. - There is provided an outer part 25 for direct contact with the geological formation and taking mechanical impacts, and a relatively wear resistant
inner part 26 through which therecess 15 is predominantly provided. - The outer part can suitably be made of an impact resistant material such described above in relation with the distance holder of Figs 2A to 2C. The
inner part 26 is formed as an insert which can be held in place between the outer part 25 and the abrasive jet stream generating tool part. - The
inner part 26 can be made of an abrasion-resistive hard material, preferably a Tungsten-Carbide, to avoid as much as possible wear resulting from the abrasive jet stream 9 which glancingly passes along theinner part 26. It can be made of the same material asnozzle 7. Because of the presence of the outer part 25, theinner part 26 can be relatively brittle, and the outer part 25 can be somewhat less wear resistant than in an embodiment where the distance holder is formed out of a unitary part. - A
distance ring 28 is provided to maintain a distance in the axial direction between theinner part 26 and the abrasive jet stream generating tool part. Herewith it is achieved that any load is transmitted exclusively between the outer part 25 and the abrasive jet stream generating tool part, such that theinner part 26 does not excert a load on thenozzle 7. Thedistance ring 28 also serves to accommodate a slight forward movement of thenozzle 17 that may result from the force associated with the pressure drops in the drilling fluid imposed by the first and second nozzles. - The separating system, which includes
magnet 11 as described above with reference to Fig. 1, is here provided excentrically with respect to axis A. - A para-magnetic attractor body 30 is provided adjacent the mixing
chamber 6 on a side thereof opposite that of themagnet 11. The para-magnetic attractor body 30 is magnetisable under the magnetic field generated bymagnet 11, and facilitates the release of para-magnetic abrasive particles into the mixingchamber 6. Anannular cover ring 29 is provided to enclose the magnetic attractor body 30. Thecover ring 29 can be held in position against the abrasive jet stream generating tool part by the distance holder 38. A similar construction can be provided in the embodiment of Figs. 1 and 2.
Claims (17)
- Distance holder for use as a part of an excavating device (1) arranged to generate a stream of an abrasive fluid to be jetted against a geological formation thereby excavating a hole (2) in the geological formation, the distance holder (8) having a wall with a trumpet shaped inner surface section (12) to be facing the geological formation there where it is to be excavated, whereby a recess (15) is formed in the trumpet shaped inner surface section (12) of the wall thereby defining an opening (16) in the trumpet shaped inner surface section (12) to allow the stream of the abrasive fluid to pass from within the recess (15) through the trumpet shaped inner surface section (12) to impact the geological formation, characterised in that the recess (15) forms a channel for guiding the stream of the abrasive fluid in the wall essentially parallel to the trumpet shaped inner surface section (12).
- Distance holder according to claim 1, wherein the trumpet shaped inner surface (12) converges in a centre area, whereby the opening (16) extends to include the centre area.
- Distance holder according to claim 1 or 2, wherein the opening (16) has an elongate contour.
- Distance holder according to claims 2 and 3, wherein the elongate contour is elongate in a direction radially outward from the centre area.
- Distance holder according to any one of the previous claims, wherein the recess (15) forms a cavity in said trumpet shaped inner surface section (12) for the abrasive jet stream to pass through.
- Distance holder according to any one of the previous claims, further comprising a peripheral outer surface section (18), which is connected to the trumpet shaped inner surface section (12) via a rim area (13), wherein the opening (16) in the trumpet shaped inner surface (12) extends to the rim area (13).
- Distance holder according to claim 6, wherein the rim area (13) is provided with one or more slots (14) for drainage of the abrasive fluid.
- Distance holder according to claim 7, wherein the one or more slots (14) extend to recesses provided in the peripheral outer surface section (18).
- Distance holder according to claim 7 or 8, wherein the opening (16) in the trumpet shaped inner surface (12) extends into one of the one or more slots (14).
- Distance holder according to any one of the previous claims, further provided with one or more cutting elements for mechanically cutting into the geological formation.
- Excavating device for excavating a hole in a geological formation, which excavating device has a proximal end and a distal end formed by a distance holder (8), which excavating device further comprises:- a body rotatable inside the hole (2) along a rotation axis;- a nozzle (7) arranged on the body to jet a stream of an abrasive fluid onto a surface in the geological formation in order to generate the hole (2), wherein the stream of the abrasive fluid has at least a radial velocity component and one parallel to the rotation axis; whereby the distance holder (8) is arranged on the body to ensure a predefined distance between the nozzle outlet and the surface in the geological formation and whereby the nozzle (7) is arranged to discharge in a recess (15) that is formed in the inner surface (12) of the wall of the distance holder (8), characterised in that the distal end is formed by the distance holder of any one of the claims 1 to 10.
- The excavating device of claim 11, wherein the trumpet shaped inner surface (12) of the distance holder (8) converges in a centre area in the axis of rotation, whereby the opening (16) extends to include the centre area.
- The excavating device of claim 11 or 12, wherein the nozzle discharge direction is substantially parallel to the trumpet shaped inner surface (12) of the distance holder (8).
- The excavating device of claim 11, 12, or 13, wherein the opening (16) is an elongate shaped opening of which the direction of elongation is aligned with the discharge direction of the nozzle (7).
- Excavating device according to any of claims 11 to 14, wherein the outer surface section (18) of the distance holder (8) is provided with one or more slots (14) for drainage of the abrasive fluid, whereby at least one of the slots (14) is located in the same azimuthal position relative to the excavation device as in which the stream of the abrasive fluid is directed.
- Excavating device according to claim 15, wherein cutting elements are arranged in the slot (14) on a forward facing side in relation to the direction of rotation.
- Excavating device according to claim 15 or 16 comprising a separation system (11) for separating abrasive material out of the stream flowing out of the excavating device and re-circulating the abrasive material back into the abrasive fluid in the nozzle (7), wherein the slot (14) is arranged such that the stream flowing out of the excavating device is directed along the separation system (11).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04817283A EP1687505B1 (en) | 2003-10-29 | 2004-10-27 | Fluid jet drilling tool |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03104007 | 2003-10-29 | ||
PCT/EP2004/051407 WO2005005766A1 (en) | 2003-07-09 | 2004-07-08 | Device for transporting particles of a magnetic material and tool comprising such a device |
EP04817283A EP1687505B1 (en) | 2003-10-29 | 2004-10-27 | Fluid jet drilling tool |
PCT/EP2004/052677 WO2005040546A1 (en) | 2003-10-29 | 2004-10-27 | Fluid jet drilling tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1687505A1 EP1687505A1 (en) | 2006-08-09 |
EP1687505B1 true EP1687505B1 (en) | 2007-09-26 |
Family
ID=34524750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04817283A Not-in-force EP1687505B1 (en) | 2003-10-29 | 2004-10-27 | Fluid jet drilling tool |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1687505B1 (en) |
CA (1) | CA2544093C (en) |
DE (1) | DE602004009212T2 (en) |
WO (1) | WO2005040546A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112901078A (en) * | 2021-02-05 | 2021-06-04 | 南京工业大学 | High-pressure water jet drilling equipment for construction of anchor rod in mine and construction method thereof |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1649132B1 (en) | 2003-07-09 | 2007-01-10 | Shell Internationale Researchmaatschappij B.V. | Tool for excavating an object |
RU2348787C2 (en) | 2003-07-09 | 2009-03-10 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. | Instrument for boring object |
AR045021A1 (en) | 2003-07-09 | 2005-10-12 | Shell Int Research | DEVICE FOR THE TRANSPORTATION OF MAGNETIC PARTICLES AND THE TOOL THAT INCLUDES SUCH DEVICE |
AR045022A1 (en) | 2003-07-09 | 2005-10-12 | Shell Int Research | SYSTEM AND METHOD FOR PERFORATING AN OBJECT |
CN1871408B (en) | 2003-10-21 | 2010-11-24 | 国际壳牌研究有限公司 | Nozzle unit and method for excavating a hole in an object |
RU2006118308A (en) | 2003-10-29 | 2007-12-10 | Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (NL) | HYDRAULIC DRILLING TOOL |
WO2007133259A1 (en) | 2006-04-18 | 2007-11-22 | Gambro Bct, Inc. | Extracorporeal blood processing apparatus with pump balancing |
DE602008004471D1 (en) * | 2007-03-22 | 2011-02-24 | Shell Int Research | SPACER WITH SCREW-TYPE SLOTTED |
AU2008228256B2 (en) * | 2007-03-22 | 2011-04-14 | Shell Internationale Research Maatschappij B.V. | Distance holder with jet deflector |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2779571A (en) * | 1954-04-09 | 1957-01-29 | Exxon Research Engineering Co | Pellet impact drill bit with controlled pellet return |
GB892905A (en) * | 1960-11-04 | 1962-04-04 | Tot Aanneming Van Werken Voor | Improvements in and relating to apparatus for making vertical holes in the ground |
US3938600A (en) * | 1973-07-16 | 1976-02-17 | Continental Oil Company | Hydraulic mining nozzle-air lift device |
US4119160A (en) * | 1977-01-31 | 1978-10-10 | The Curators Of The University Of Missouri | Method and apparatus for water jet drilling of rock |
GB2324818B (en) * | 1997-05-02 | 1999-07-14 | Sofitech Nv | Jetting tool for well cleaning |
US5887667A (en) * | 1997-07-16 | 1999-03-30 | Ring-O-Matic Manufacturing Company, Inc. | Method and means for drilling an earthen hole |
MY136183A (en) * | 2001-03-06 | 2008-08-29 | Shell Int Research | Jet cutting device with deflector |
-
2004
- 2004-10-27 WO PCT/EP2004/052677 patent/WO2005040546A1/en active IP Right Grant
- 2004-10-27 EP EP04817283A patent/EP1687505B1/en not_active Not-in-force
- 2004-10-27 DE DE602004009212T patent/DE602004009212T2/en not_active Expired - Fee Related
- 2004-10-27 CA CA2544093A patent/CA2544093C/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112901078A (en) * | 2021-02-05 | 2021-06-04 | 南京工业大学 | High-pressure water jet drilling equipment for construction of anchor rod in mine and construction method thereof |
CN112901078B (en) * | 2021-02-05 | 2022-02-01 | 南京工业大学 | High-pressure water jet drilling equipment for construction of anchor rod in mine and construction method thereof |
Also Published As
Publication number | Publication date |
---|---|
CA2544093A1 (en) | 2005-05-06 |
CA2544093C (en) | 2013-02-26 |
DE602004009212D1 (en) | 2007-11-08 |
WO2005040546A1 (en) | 2005-05-06 |
EP1687505A1 (en) | 2006-08-09 |
DE602004009212T2 (en) | 2008-01-24 |
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