EP0502938A1 - Outil de forage a systeme d'irrigation au moyen d'un fluide distribue par un oscillateur fluidique. - Google Patents
Outil de forage a systeme d'irrigation au moyen d'un fluide distribue par un oscillateur fluidique.Info
- Publication number
- EP0502938A1 EP0502938A1 EP91900263A EP91900263A EP0502938A1 EP 0502938 A1 EP0502938 A1 EP 0502938A1 EP 91900263 A EP91900263 A EP 91900263A EP 91900263 A EP91900263 A EP 91900263A EP 0502938 A1 EP0502938 A1 EP 0502938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- nozzle
- jets
- drilling tool
- dividing element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 42
- 238000005553 drilling Methods 0.000 title claims abstract description 32
- 230000002262 irrigation Effects 0.000 claims abstract description 21
- 238000003973 irrigation Methods 0.000 claims abstract description 21
- 230000001133 acceleration Effects 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005406 washing Methods 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
-
- 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
-
- 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
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
- Y10T137/2087—Means to cause rotational flow of fluid [e.g., vortex generator]
- Y10T137/2109—By tangential input to axial output [e.g., vortex amplifier]
- Y10T137/2115—With means to vary input or output of device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]
- Y10T137/218—Means to regulate or vary operation of device
- Y10T137/2185—To vary frequency of pulses or oscillations
Definitions
- the present invention relates to a rotary tool provided with an irrigation system which makes it possible to clean the tool by means of a fluid distributed by a fluidic oscillator.
- the invention applies in particular to tools for drilling oil or mining wells.
- a fluidic oscillator makes it possible to switch a flow of fluid which passes through it alternately in two different directions, with a frequency which depends on the flow rate of the fluid, as well as on the physical characteristics of the oscillator.
- monostable Coanda effect oscillators which generally comprise a supply nozzle opening into a distribution chamber for the flow of fluid in two possible directions, defined between concentric surfaces.
- the latter are shaped so that the fluid attaches stably to one of them, thus favoring the flow in one of the directions.
- the flow can be switched to the other direction under the action of an external force involving low energy.
- the flow in the new direction being unstable, it tends to spontaneously switch to the stable direction as soon as said action has ceased.
- Fluid oscillators are also known which operate on the same principle as a whistle, that is to say by the natural phenomenon of the spontaneous vibration of air on either side of a pointed rigid piece or ending with an edge.
- the present invention relates to the application of fluidic oscillators for the irrigation of rotary tools, and more particularly drilling tools comprising a head pierced with at least two channels which open onto the surface of the head of the tool.
- a drilling tool is known which is equipped with a percussive mass freely movable mounted in an envelope and with a fluidic oscillator which drives said mass in alternating vibratory movement.
- no irrigation system is provided on this tool to clean or cool critical areas of the tool.
- US-A-3,405,770 relates to a drilling tool in which a fluid is subjected to a cycle of pressure reductions in the vicinity of the borehole and simultaneously increases in the speed of the ejected fluid.
- the fluid attacks the rock but is not used to clean the tool.
- US-A-3,630,689 also relates to a drilling tool comprising a fluidic oscillator intended to generate phase-shifted pressure fluctuations in two channels.
- the jets of fluid are used to attack the rock but not to clean the tool.
- Patent FR-A-2 352 943 relates to a drilling tool in which the fluid is sent to the rock in the form of two jets drawn under pressure, with a view to driving the cuttings towards the outside of the well.
- an irrigation system for a drilling tool is known, through a network of channels drilled in the tool, and at the outputs of which are mounted suitably oriented nozzles to project, either directly or indirectly, onto selected parts of the tool, such as cutters, continuous jets of fluid capable of removing the particles of rock and mud which adhere to it.
- this irrigation system keeps a relative efficiency insofar as, the total flow of fluid being divided between the nozzles, the power of each jet represents only a fraction of the total power of the fluid, so that the jets are sometimes too weak to clean the tool completely or in critical areas.
- the invention relates to a drilling tool provided with an irrigation system free from the drawbacks of the cited prior art.
- the drilling tool according to the invention is characterized in that it comprises a hollow drilling head in which is housed at least one fluidic oscillator comprising an acceleration nozzle supplied by an irrigation fluid, such as sludge, and which opens into a cavity in which is mounted a divider element provided with an edge situated slightly downstream of the nozzle, said divider element defining in said cavity two passages towards which the fluid is directed alternately in pulsed jets, said passages communicating respectively with two series of channels opening onto the external surface of the head by a plurality of outlets oriented with inclinations such that the pulsed jets of fluid which they emit are directed towards the parts of the head to be cleaned, cooled or lubricated.
- a fluidic oscillator comprising an acceleration nozzle supplied by an irrigation fluid, such as sludge
- an irrigation fluid such as sludge
- An advantage of the irrigation system according to the invention lies in the fact that the fluid flow is switched from one channel to the other a great number of times per second and that at each switching, all or almost all - the entire flow passes through the corresponding channel.
- the impact energy obtained with the system according to the invention will be double that obtained with conventional systems where the total flow is shared between the outputs.
- Another advantage of the invention lies in the fact that it becomes possible to increase the useful outlet section without compromising the quality of the cleaning of the selected areas.
- alternating pulses emitted at relatively high frequency are more effective than a continuous jet.
- the acceleration nozzle has a section. annular and the dividing element is tubular with a frustoconical outer face widening in the direction of the fluid flow and an frustoconical inner face narrowing in the direction of the flow, said faces defining at the upper end of the 'divider a circular edge of the same diameter as the outlet of the nozzle and coaxial therewith.
- the nozzle has a straight outlet slot and the dividing element is in the form of a dihedral with a straight edge.
- the irrigation system allows the cleaning of blades, cutters, diamonds or other elements for cutting diamond tools, knurling wheels, teeth or spikes of tricone tools, etc.
- Figure 1 is an axial sectional view of a drilling tool according to a first embodiment
- Figure 2 is a sectional view along line II-
- Figure 3 is a sectional view along line III-III of Figure 1;
- Figure 4 shows an axial sectional view of a drilling tool according to a second embodiment
- Figure 5 is a sectional view along line V- of Figure 4.
- FIG. 6 schematically shows an oscillator assembly making it possible to obtain two jets alternating with a constant jet
- FIG. 7 schematically represents an irrigation system with three fluidic oscillators making it possible to increase the frequency of the alternating jets.
- a rotary drilling tool has been designated by 10. This includes a tubular portion
- a head 14 having on its surface of the attack elements may have a wide variety of shapes.
- the head is pierced with a plurality of channels for the passage of an irrigation fluid, for example a central channel 1 parallel to the axis of the tool and three lateral channels 18 20, 22 distributed regularly around the central channel .
- This channels can branch in the vicinity of their extremity so as to open out by several groups of outlet orifices 21 suitably oriented so that they project jets of fluid towards selected parts of the tool which particularly need to be washed cooled. or lubricated.
- the outlet ports may have nozzles.
- a fluidic oscillator 2 formed of two superimposed cylindrical bodies 19, 24.
- the upper body 19 is provided with an acceleration nozzle 26 of tubular shape, through which the fluid arrives.
- L lower body 24 is tubular, and has at its upper part a cylindrical bore 28 of relatively large diameter followed by a bore 30 of smaller diameter and which expands in the direction of flow. This two bores define between them a shoulder annular 32 facing the nozzle.
- a tubular divider element 34 provided with a frustoconical outer face flaring in the direction of flow and of a frustoconical inner face narrowing in the direction of flow.
- the dividing element ends at its upper end with a circular edge 36 of diameter equal to that of the annular outlet orifice for the nozzle 26. This edge is coaxial with said orifice, slightly downstream of it, and is located at above the level of the shoulder 32.
- a central core 38 In the cavity of the dividing element 34 is mounted coaxially a central core 38 extending over the entire height of the lower body 24.
- This core has an internal annular shoulder 40 facing the nozzle and being at the same level as the shoulder external 32.
- the core Under the shoulder 40, the core has a frustoconical shape, with the same conicity as the external surface of the dividing element. It follows from this geometry that the dividing element defines with the central core an internal annular passage 42 and, with the lower body 24, an external annular passage 44. These passages are dimensioned with diameters chosen so that they open respectively into the central channel 16 and lateral channels 18, 20, 22.
- central core 38 can be eliminated and the shoulders 40 formed on the internal frustoconical wall of the divider element 34.
- the operation of the system of FIGS. 1 to 3 is as follows: the drilling mud is accelerated in the nozzle 26 and emerges at high speed in a distribution chamber 46 defined above the shoulders 32, 40. Due to the vibrational phenomenon explained previously, the flow of mud alternately passes inside the dividing element, through the internal passage 42, towards the central channel 16, then outside of said element, by the passage 44, towards the lateral channels 18, 20 and 22, and this at a frequency which depends on the speed of the flow and on the geometry of the dividing element. This vibratory phenomenon is favored by the presence of the annular shoulders 32, 40, since they have the effect of returning part of the fluid flow from one passage to the other. However, the device can also function satisfactorily even in the absence of any shoulder. In the embodiment of FIGS.
- the fluidic oscillator 23 ′ comprises a nozzle 26 ′ of square or rectangular section, with rectilinear outlet slot which opens into a distribution chamber 46 ′ of dihedral shape, the walls of which have two parallel shoulders 32 ', 32 ".
- a divider element 34' in the form of a dihedral with a straight edge 36 'which defines two passages 42' and 44 'communicating respectively with the channels 16, 18 of the tool.
- the operation of this oscillator is similar to that of FIG. 1.
- the shoulders 32 ′, 32 "return part of the flow of the fluid from one passage to the other, thus promoting the vibratory phenomenon.
- a fluidic oscillator can be produced, one of the passages of which receives more fluid than the other, by slightly shifting the divider element 34 or 34 'relative to the axis of the nozzle. In this case, the flow rate in the passage which receives the most fluid is only partially switched to the other passage. It follows that the nozzles connected to said passage receive a constant flow to which is added a variable flow giving rise to alternating jets.
- the hydraulic system represented in FIG. 6 comprises a fluidic oscillator 23 according to one of the types presented above.
- the oscillator is supplied with drilling mud by a pipe 48 and emits, through several channels (for example two channels 16, 18), two alternating and intermittent jets. Part of the drilling mud flow is taken upstream of the oscillator through a conduit 50 in order to be directed onto an area which requires permanent irrigation. All of these elements are integrated into the tool, which has not been represented for the sake of simplification.
- the system of FIG. 7 comprises a first fluidic oscillator 232 ⁇ u ⁇ - emits two intermittent and alternating jets through two channels 52, 54, which are connected respectively to two fluidic oscillators 233, 23 ⁇ .
- Each of these jets is therefore transformed into two jets of higher frequency, and which are emitted by channels 56,58, for the oscillator 233, and by channels 60, 62 for the oscillator 23 ⁇ .
- channels 56 to 62 can in turn supply other oscillators. It is thus possible to constitute an irrigation system with two, three or more stages of oscillators providing intermittent jets of different frequencies.
- the divider element of Figure 1 can be simply tubular without having internal and external taper.
- the divider element of Figure 4 can be constituted by a single wall, with parallel or substantially parallel faces.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Nozzles (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Micromachines (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8915871A FR2655372A1 (fr) | 1989-12-01 | 1989-12-01 | Systeme d'irrigation d'un outil rotatif, notamment d'un outil de forage, au moyen d'un fluide distribue par un oscillateur fluidique. |
FR8915871 | 1989-12-01 | ||
PCT/FR1990/000849 WO1991008371A1 (fr) | 1989-12-01 | 1990-11-26 | Outil de forage a systeme d'irrigation au moyen d'un fluide distribue par un oscillateur fluidique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0502938A1 true EP0502938A1 (fr) | 1992-09-16 |
EP0502938B1 EP0502938B1 (fr) | 1994-07-06 |
Family
ID=9388029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910900263 Expired - Lifetime EP0502938B1 (fr) | 1989-12-01 | 1990-11-26 | Outil de forage a systeme d'irrigation au moyen d'un fluide distribue par un oscillateur fluidique |
Country Status (7)
Country | Link |
---|---|
US (1) | US5230389A (fr) |
EP (1) | EP0502938B1 (fr) |
JP (1) | JPH05506485A (fr) |
CA (1) | CA2069953A1 (fr) |
DE (1) | DE69010511D1 (fr) |
FR (1) | FR2655372A1 (fr) |
WO (1) | WO1991008371A1 (fr) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2081292C1 (ru) * | 1991-10-15 | 1997-06-10 | Палс | Насадка для получения пульсации самовозбуждающихся колебаний струи бурового раствора и буровой инструмент с этой насадкой |
DE4225439C2 (de) * | 1992-07-31 | 1996-08-01 | Reburg Patentverwertungs Gmbh | Bohrvorrichtung |
US6390211B1 (en) | 1999-06-21 | 2002-05-21 | Baker Hughes Incorporated | Variable orientation nozzles for earth boring drill bits, drill bits so equipped, and methods of orienting |
US7802640B2 (en) | 2005-08-23 | 2010-09-28 | Halliburton Energy Services, Inc. | Rotary drill bit with nozzles designed to enhance hydraulic performance and drilling fluid efficiency |
DE102007012859B4 (de) * | 2007-03-17 | 2009-01-02 | Josef Albrecht Bohrfutterfabrik Gmbh & Co. Kg | Spülbares Futter |
US20100276206A1 (en) * | 2008-07-25 | 2010-11-04 | Anatoli Borissov | Rotary Drill Bit |
US8100201B2 (en) * | 2008-07-25 | 2012-01-24 | Bluefire Equipment Corporation | Rotary drill bit |
US20100193253A1 (en) * | 2009-01-30 | 2010-08-05 | Massey Alan J | Earth-boring tools and bodies of such tools including nozzle recesses, and methods of forming same |
US8272404B2 (en) | 2009-10-29 | 2012-09-25 | Baker Hughes Incorporated | Fluidic impulse generator |
CN101824965B (zh) * | 2010-04-06 | 2013-01-16 | 中国石油大学(北京) | 水力脉冲空化射流发生装置 |
US8844651B2 (en) | 2011-07-21 | 2014-09-30 | Halliburton Energy Services, Inc. | Three dimensional fluidic jet control |
CN102287136B (zh) * | 2011-08-20 | 2013-05-22 | 大庆井泰石油工程技术股份有限公司 | 水力喷射钻井喷头 |
CN102518398B (zh) * | 2011-12-09 | 2013-10-30 | 西南石油大学 | 一种径向水平井钻井用自进式高压射流喷头 |
CZ2014903A3 (cs) * | 2014-12-15 | 2016-07-20 | Ústav termomechaniky Akademie věd České republiky v.v.i. | Fluidický oscilátor |
US10174592B2 (en) * | 2017-01-10 | 2019-01-08 | Rex A. Dodd LLC | Well stimulation and cleaning tool |
WO2018204655A1 (fr) * | 2017-05-03 | 2018-11-08 | Coil Solutions, Inc. | Outil de portée étendue |
WO2018204644A1 (fr) * | 2017-05-03 | 2018-11-08 | Coil Solutions, Inc. | Outil d'amélioration de jets de trépan |
EP3421163A1 (fr) * | 2017-06-27 | 2019-01-02 | HILTI Aktiengesellschaft | Foret pour le travail de roche par impact |
EP3421205A1 (fr) * | 2017-06-27 | 2019-01-02 | HILTI Aktiengesellschaft | Foret pour le burinage de roche |
CN107795282B (zh) * | 2017-11-21 | 2023-10-27 | 中南大学 | 双控制道脉冲射流球齿钻头 |
CN107939293B (zh) * | 2017-12-19 | 2024-04-05 | 中南大学 | 井下压力脉冲发生器 |
CN107882509B (zh) * | 2017-12-19 | 2024-07-12 | 中南大学 | 井底压力脉冲减阻工具 |
CN112227956B (zh) * | 2020-09-18 | 2023-01-24 | 长江大学 | 一种射流式水力脉冲短节 |
US11988046B1 (en) | 2023-10-22 | 2024-05-21 | Cool Edge Bits | Hydrojets rotary drill bit |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3405770A (en) * | 1966-05-25 | 1968-10-15 | Hughes Tool Co | Drilling method and apparatus employing pressure variations in a drilling fluid |
US3532174A (en) * | 1969-05-15 | 1970-10-06 | Nick D Diamantides | Vibratory drill apparatus |
US3610347A (en) * | 1969-06-02 | 1971-10-05 | Nick D Diamantides | Vibratory drill apparatus |
FR2352943A1 (fr) * | 1976-05-26 | 1977-12-23 | Bvs | Procede de forage de roches et dispositif pour la mise en oeuvre de ce procede |
FR2399530A1 (fr) * | 1977-08-05 | 1979-03-02 | Petroles Cie Francaise | Outil de forage rotatif equipe d'un dispositif de percussion |
JPS556067A (en) * | 1978-06-30 | 1980-01-17 | Arai Pump Mfg Co Ltd | Slant face seal |
WO1980002858A1 (fr) * | 1979-06-19 | 1980-12-24 | Syndrill Prod Joint Venture | Trepan de forage d'un trou profond dans la roche |
US4979577A (en) * | 1983-07-08 | 1990-12-25 | Intech International, Inc. | Flow pulsing apparatus and method for down-hole drilling equipment |
CA1234094A (fr) * | 1984-08-06 | 1988-03-15 | Djurre H. Zijsling | Trepan de forage |
US4630689A (en) * | 1985-03-04 | 1986-12-23 | Hughes Tool Company-Usa | Downhole pressure fluctuating tool |
US5009272A (en) * | 1988-11-25 | 1991-04-23 | Intech International, Inc. | Flow pulsing method and apparatus for drill string |
US5165438A (en) * | 1992-05-26 | 1992-11-24 | Facteau David M | Fluidic oscillator |
-
1989
- 1989-12-01 FR FR8915871A patent/FR2655372A1/fr not_active Withdrawn
-
1990
- 1990-11-26 EP EP19910900263 patent/EP0502938B1/fr not_active Expired - Lifetime
- 1990-11-26 US US07/859,457 patent/US5230389A/en not_active Expired - Fee Related
- 1990-11-26 WO PCT/FR1990/000849 patent/WO1991008371A1/fr active IP Right Grant
- 1990-11-26 JP JP91500970A patent/JPH05506485A/ja active Pending
- 1990-11-26 DE DE69010511T patent/DE69010511D1/de not_active Expired - Lifetime
- 1990-11-26 CA CA 2069953 patent/CA2069953A1/fr not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9108371A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5230389A (en) | 1993-07-27 |
JPH05506485A (ja) | 1993-09-22 |
WO1991008371A1 (fr) | 1991-06-13 |
DE69010511D1 (de) | 1994-08-11 |
FR2655372A1 (fr) | 1991-06-07 |
CA2069953A1 (fr) | 1991-06-02 |
EP0502938B1 (fr) | 1994-07-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0502938B1 (fr) | Outil de forage a systeme d'irrigation au moyen d'un fluide distribue par un oscillateur fluidique | |
BE1012597A5 (fr) | Trepans de forage a caracteristiques d'ecoulement hydraulique ameliorees. | |
CA1091220A (fr) | Outil de forage a jet d'aspiration | |
US7404416B2 (en) | Apparatus and method for creating pulsating fluid flow, and method of manufacture for the apparatus | |
CA1104999A (fr) | Outil de forage perfectionne a jets d'aspiration | |
FR2488153A1 (fr) | Buse a haut rendement | |
EP0533550B1 (fr) | Duse divergente pour outil de forage, et outil utilisant une telle duse | |
EP1480756B2 (fr) | Dispositif de pulverisation de produit de revetement liquide | |
WO2017021664A1 (fr) | Systeme d'excavation a outils interchangeables | |
EP1231326A1 (fr) | Tête d'injection sous pression | |
JPH02212099A (ja) | 水とシェービング剤の混合物により対象物を切断及び清浄し、材料を目的に応じて搬出させる方法及び装置 | |
EP0170548B1 (fr) | Méthode et perfectionnement aux outils de forage permettant une grande efficacité du nettoyage du front de taille | |
EP0296208B1 (fr) | Outil de forage a jet incline | |
CA1110225A (fr) | Outil de forage rotatif equipe d'un dispositif de percussion | |
EP0972574B1 (fr) | Buse de pulvérisation de liquides | |
EP0084026B1 (fr) | Procede, dispositifs et application pour produire des emulsions par des sifflets a ultrasons | |
FR2643291A1 (fr) | Perfectionnement aux dispositifs pour la projection de jets de liquide a des fins de nettoyage et/ou de decoupe | |
FR2714153A1 (fr) | Dispositif d'injection, notamment dispositif d'injection pour un moteur à réacteur. | |
FR2608673A1 (fr) | Canon d'abattage hydraulique a action impulsionnelle | |
RU2244797C1 (ru) | Буровое долото | |
CA1306242C (fr) | Outil de forage a jet incline | |
FR2679468A1 (fr) | Buse engendrant un jet a ecoulement en regime laminaire. | |
FR2510008A1 (fr) | Atomiseur, notamment pour refroidir dans le sens de sa largeur un produit coule en continu | |
FR2558891A1 (fr) | Taillant de foration rotative assistee par jets haute pression | |
FR2714311A1 (fr) | Buse à jet laminaire comportant une chambre de détente. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19920521 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE CH DE GB IT LI NL |
|
17Q | First examination report despatched |
Effective date: 19931119 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed | ||
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE CH DE GB IT LI NL |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940704 |
|
REF | Corresponds to: |
Ref document number: 69010511 Country of ref document: DE Date of ref document: 19940811 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19941007 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19941126 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19941130 Ref country code: CH Effective date: 19941130 Ref country code: BE Effective date: 19941130 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
BERE | Be: lapsed |
Owner name: TOTAL Effective date: 19941130 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19950601 |
|
26N | No opposition filed | ||
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19941126 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20051126 |