US3528704A - Process for drilling by a cavitating fluid jet - Google Patents
Process for drilling by a cavitating fluid jet Download PDFInfo
- Publication number
- US3528704A US3528704A US745611A US3528704DA US3528704A US 3528704 A US3528704 A US 3528704A US 745611 A US745611 A US 745611A US 3528704D A US3528704D A US 3528704DA US 3528704 A US3528704 A US 3528704A
- Authority
- US
- United States
- Prior art keywords
- drilling
- water
- nozzle
- stream
- jet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 title description 19
- 238000000034 method Methods 0.000 title description 19
- 238000005553 drilling Methods 0.000 title description 14
- 230000008569 process Effects 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 239000007787 solid Substances 0.000 description 10
- 230000003628 erosive effect Effects 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011343 solid material Substances 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
Definitions
- ABSTRACT OF THE DISCLOSURE A method for advantageously utilizing the normally destructive forces of cavitation to provide an erosion effect for accomplishing drilling, boring, and like functions of solids which comprises forming a fluid jet by directing the fluid through a restricted orifice at speeds sufiicient to generate vapor-filled bubbles in the jet and impinging the jet against the solid at a distance from the orifice where the vapor bubbles collapse.
- Cavitation is defined as the formation growth and collapse of vapor-filled cavities in a flowing liquid which occur at a level where local pressure is reduced below the vapor pressure of the liquid. These vapor cavities, commonly called bubbles, collapse With a violence which damages and erodes material at the area of collapse.
- cavitation has been a prime consideration in the choice and design of propellers, hydraulic equipment and other mechanical arts wherein there is a relatively high-speed movement between an article and a surrounding fluid.
- the primary work of the prior art has been to eliminate the damage caused by cavitation whereas in the instant invention the primary objective is to utilize this turbulent force.
- Liquid impact damage presents itself when liquid drops exist in a gaseous, or vaporous medium.
- the occurrence of this type of damage is found in steam turbine blades which strike tiny droplets condensing from steam and in the leading edge of high speed aircraft wings which strike water droplets in the atmosphere.
- liquid impact erosion has been found to be unsuitable from a time and a power viewpoint.
- a stream of water having vapor cavities therein is projected against a solid surface in such a way that its cavitation bubbles collapse at the area in which the stream has impact with the solid material. Since cavitation bubbles are efliciently produced in water and because efiicient cavitation can be obtained within a wide range of parameters relating pressure, volume, and the like, the apparatus and method disclosed below are conveniently utilized in such environments as underground tunneling. Drilling by cavitation has the advantage of reducing very hard elements such as certain types of rock, to very small particles which are easily removed from the area of drilling by exhaustion with the 'ice propelling water by means well known to those skilled in the art.
- a further objective of this invention is to provide a mechanism for efliciently producing vapor cavities and impelling their stream to, or very near, a solid substance at the time of collapse whereby the shock of a cavity collapse will erode the substance.
- Another objective of this invention is to provide a system wherein maximum intensity of erosion is obtained by impacting a solid area with a stream of Water at a selected distance of maximum cavity collapse.
- a still further objective of this invention is to provide a method and apparatus for obtaining, with a minimum of power, the production of high vapor cavities and impacting these vapors at an area of stagnation wherein the greatest amount of collapsing impact, and thus the greatest amount of erosion, is obtained within selected efficient parameters.
- a further objective of this invention is to provide a means for eroding a surface by propelling a stream of water thereon wherein the horsepower expended in propelling the Water is at a minimum because the effects of erosion are primarily obtained by collapsing vapor cavities rather than the inertia or impact effect caused by the velocity of the water itself.
- a still further objective of the invention is the generation of vapor cavities within a stream of water by use of a nozzle and so arranging the nozzle components that cavitation bubbles are isolated from the nozzle itself and will be directed and collapsed on the surface of the material to be drilled without concurrent cavitation damage of the nozzle.
- a more specific objective of the methods and constructions set forth hereinafter is to provide a convenient method for tunneling underground passages which is less expensive, safer and faster than those methods here tofore known.
- FIG. 1 is a cross section view showing the principal characteristics of one form of nozzle
- FIGS. 2-6 are diagrammatic views showing other forms of the invention.
- FIGS. 7 and 8 are diagrammatic views showing a working environment of the nozzles of FIGS. 1-6 inclusive.
- the numeral 10 indicates a nozzle housing.
- the housing defines a chamber 12 which receives fluid under pressure by way of a conventional fitting 14 near one end of the housing.
- the interior surface 16 of the housing tapers to an outlet opening 18 at the other end of the housing.
- a stem member 20' is received Within the chamber 12 and is terminated by a lower surface 22 normally located beyond the periphery of opening 18.
- the stem is threadably received through the upper end of housing 10 and is longitudinally adjustable with respect to the housing upon rotation of the stem.
- the purpose of longitudinally adjusting the stem 20 is to change the position of surface 22 with respect to the opening 18.
- the distance from opening 18 at which there is maximum cavity collapse can be determined both mathematically and empirically. As shown in FIG. 1, this distance is labeled as d.
- the nozzle is located such that the surface 30 is the distance from d to the nozzle. In other words, the surface 30 is located at the area of maximum cavity collapse.
- the location of stem 20 within the opening 18 causes a further increase in the velocity of the stream by reducing its area of exhaust.
- an evacuated core area 32 is formed which further reduces the pressure within the stream. This, of course, increases the formation of additional bubbles of cavitation.
- a nozzle housing has been described which maximizes the formation of cavitation bubbles under certain pressures and velocity and which bubbles are utilized to erode the surface 30.
- This invention encompasses various other nozzle geometry for accomplishing a drilling function through erosion.
- the lower end of the stem is formed with a tear-shaped ending which can very accurately adjust the annular discharge area of opening 18.
- FIG. 4 utilizes a cylindrical outlet such as 18b in combination with a cavitating disc 36 aflixed to the lower end of a stem member.
- the cavitating disc maximizes the interior evacuated core 32 as the fluid passes.
- FIG. 5 By locating a grid or screen 34 near the opening 18, as seen in FIG. 5, a plurality of uniformly spaced areas are formed.
- FIG. 6 A still further embodiment of the invention is shown in FIG. 6 wherein flow rotating stator vanes 38 are disposed within the chamber 12 for imparting a vortex movement to the stream as it leaves the nozzle.
- each of the nozzles of FIGS. 1 through 6 are adapted to exhaust and direct a stream of water in which cavitation bubbles have been formed.
- the particular construction of the nozzle to be used will depend primarily on the hardness and consistency of the surface 30 to be drilled and the pressure and velocity at which one chooses to work.
- FIGS. 7 and 8 diagrammatically show a use for nozzles of the type described.
- a drilling apparatus is generally indicated by the numeral 50.
- the apparatus includes a water manifold 52 which receives water under pressure through a fitting such as that indicated by the numeral 54.
- Rotatably received within the manifold is a shaft 56 which is rotated by a motor 58.
- Aflixed to the shaft 56 and extending outwardly from the manifold 52 are a plurality of tubular members 60 having nozzle housing 10 aflixed at their outer ends. The interiors of the tubular members are communicated with the manifold 52 and deliver the water under pressure to the nozzles.
- the several embodiments of the nozzle are venturies having an annular outlet so constructed and designed that as the water is discharged therefrom the velocity increases and the pressure decreases to produce vapor cavities.
- dividing means are associated with the nozzle outlet whereby, a cylindrical tubular stream is discharged thereby further increasing velocity and establishing a vacuum area axial of the dividing means but terminating short of the work face.
- the stream dividing means are respectively the screen and rotor.
- a divider is not utilized, but increase in velocity and decrease in pressure results in the formation of the vapor cavities.
- a method of drilling through a relatively hard solid substance with a pressurized fluid comprising the steps of forming a fluid jet by directing said fluid through a restricted orifice to restrict the flow of the fluid jet and increase its velocity and decrease its pressure below the vapor pressure of the fluid to form vapor cavities of the fluid therein and impinging said jet against the solid at a distance from the orifice where said vapor cavities collapse.
- the method of claim 1 to include the step of inducing a vortex movement to said jet in said nozzle.
- the invention of claim 1 to include the step of traversing said jet in a fixed geometric pattern with respect to said surface.
- a method of drilling a relatively solid substance which comprises:
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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)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US74561168A | 1968-07-17 | 1968-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3528704A true US3528704A (en) | 1970-09-15 |
Family
ID=24997470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US745611A Expired - Lifetime US3528704A (en) | 1968-07-17 | 1968-07-17 | Process for drilling by a cavitating fluid jet |
Country Status (1)
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US (1) | US3528704A (en) |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4185706A (en) * | 1978-11-17 | 1980-01-29 | Smith International, Inc. | Rock bit with cavitating jet nozzles |
US4187921A (en) * | 1978-12-01 | 1980-02-12 | Smith International, Inc. | Rock bit combination to enhance cuttings removal |
US4262757A (en) * | 1978-08-04 | 1981-04-21 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
EP0029469A1 (en) * | 1979-11-15 | 1981-06-03 | Ballast-Nedam Groep N.V. | A method of dredging and dredging implement |
EP0062111A2 (en) * | 1980-12-12 | 1982-10-13 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4389071A (en) * | 1980-12-12 | 1983-06-21 | Hydronautics, Inc. | Enhancing liquid jet erosion |
US4391339A (en) * | 1978-08-04 | 1983-07-05 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
FR2534158A1 (en) * | 1982-10-07 | 1984-04-13 | Alsthom Atlantique | DEVICE FOR EROSIONING A SOLID SURFACE BY A CAVITANT FLOW |
US4531592A (en) * | 1983-02-07 | 1985-07-30 | Asadollah Hayatdavoudi | Jet nozzle |
EP0245971A2 (en) * | 1986-04-18 | 1987-11-19 | Dickinson, Ben Wade Oakes, III | Hydraulic drilling apparatus and method |
US4852668A (en) * | 1986-04-18 | 1989-08-01 | Ben Wade Oakes Dickinson, III | Hydraulic drilling apparatus and method |
US5086974A (en) * | 1990-12-18 | 1992-02-11 | Nlb Corp. | Cavitating jet nozzle |
US5125582A (en) * | 1990-08-31 | 1992-06-30 | Halliburton Company | Surge enhanced cavitating jet |
US5154347A (en) * | 1991-02-05 | 1992-10-13 | National Research Council Canada | Ultrasonically generated cavitating or interrupted jet |
US5186389A (en) * | 1990-04-03 | 1993-02-16 | S & C Co.,Ltd. | Spray tube ultrasonic washing apparatus |
US5199512A (en) * | 1990-09-04 | 1993-04-06 | Ccore Technology And Licensing, Ltd. | Method of an apparatus for jet cutting |
US5217163A (en) * | 1990-12-18 | 1993-06-08 | Nlb Corp. | Rotating cavitating jet nozzle |
US5291957A (en) * | 1990-09-04 | 1994-03-08 | Ccore Technology And Licensing, Ltd. | Method and apparatus for jet cutting |
US5363927A (en) * | 1993-09-27 | 1994-11-15 | Frank Robert C | Apparatus and method for hydraulic drilling |
US5375771A (en) * | 1993-02-10 | 1994-12-27 | Jameel; Mohomed I. | Advanced sootblower nozzle design |
US5494124A (en) * | 1993-10-08 | 1996-02-27 | Vortexx Group, Inc. | Negative pressure vortex nozzle |
US5542486A (en) * | 1990-09-04 | 1996-08-06 | Ccore Technology & Licensing Limited | Method of and apparatus for single plenum jet cutting |
US5785258A (en) * | 1993-10-08 | 1998-07-28 | Vortexx Group Incorporated | Method and apparatus for conditioning fluid flow |
US5862871A (en) * | 1996-02-20 | 1999-01-26 | Ccore Technology & Licensing Limited, A Texas Limited Partnership | Axial-vortex jet drilling system and method |
US5941461A (en) * | 1997-09-29 | 1999-08-24 | Vortexx Group Incorporated | Nozzle assembly and method for enhancing fluid entrainment |
US5992763A (en) * | 1997-08-06 | 1999-11-30 | Vortexx Group Incorporated | Nozzle and method for enhancing fluid entrainment |
US6200486B1 (en) | 1999-04-02 | 2001-03-13 | Dynaflow, Inc. | Fluid jet cavitation method and system for efficient decontamination of liquids |
US6221260B1 (en) | 1999-04-02 | 2001-04-24 | Dynaflow, Inc. | Swirling fluid jet cavitation method and system for efficient decontamination of liquids |
US6555002B2 (en) | 2000-10-06 | 2003-04-29 | Premier Wastwater International, Llc | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
US6702204B2 (en) | 2000-03-01 | 2004-03-09 | Bip Technology, Ltd. | Cavitating jet |
US6705396B1 (en) * | 1999-10-04 | 2004-03-16 | Bip Technology Ltd | Method and apparatus for producing fluid cavitation |
US20090140067A1 (en) * | 2007-11-29 | 2009-06-04 | Vedanth Srinivasan | Devices and Methods for Atomizing Fluids |
US20090227185A1 (en) * | 2008-03-10 | 2009-09-10 | David Archibold Summers | Method and apparatus for jet-assisted drilling or cutting |
WO2018018662A1 (en) * | 2016-07-26 | 2018-02-01 | 江苏大学 | Method and device for cavitation accumulation processing |
WO2024089282A1 (en) | 2022-10-28 | 2024-05-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device, construction kit, and method for generating a pulsed liquid jet which contains cavitation bubbles |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2018926A (en) * | 1934-04-23 | 1935-10-29 | George J Schroepfer | Method and apparatus for excavating tunnels |
US3174561A (en) * | 1960-03-23 | 1965-03-23 | Eugene L Sterrett | Cavitation as an aid to rotary drilling |
US3373752A (en) * | 1962-11-13 | 1968-03-19 | Inoue Kiyoshi | Method for the ultrasonic cleaning of surfaces |
US3387672A (en) * | 1964-06-26 | 1968-06-11 | Mobil Oil Corp | Cavitational method for drilling wells |
US3402075A (en) * | 1963-04-08 | 1968-09-17 | Lever Brothers Ltd | Ultrasonic washing |
-
1968
- 1968-07-17 US US745611A patent/US3528704A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2018926A (en) * | 1934-04-23 | 1935-10-29 | George J Schroepfer | Method and apparatus for excavating tunnels |
US3174561A (en) * | 1960-03-23 | 1965-03-23 | Eugene L Sterrett | Cavitation as an aid to rotary drilling |
US3373752A (en) * | 1962-11-13 | 1968-03-19 | Inoue Kiyoshi | Method for the ultrasonic cleaning of surfaces |
US3402075A (en) * | 1963-04-08 | 1968-09-17 | Lever Brothers Ltd | Ultrasonic washing |
US3387672A (en) * | 1964-06-26 | 1968-06-11 | Mobil Oil Corp | Cavitational method for drilling wells |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4262757A (en) * | 1978-08-04 | 1981-04-21 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
US4391339A (en) * | 1978-08-04 | 1983-07-05 | Hydronautics, Incorporated | Cavitating liquid jet assisted drill bit and method for deep-hole drilling |
US4185706A (en) * | 1978-11-17 | 1980-01-29 | Smith International, Inc. | Rock bit with cavitating jet nozzles |
US4187921A (en) * | 1978-12-01 | 1980-02-12 | Smith International, Inc. | Rock bit combination to enhance cuttings removal |
EP0029469A1 (en) * | 1979-11-15 | 1981-06-03 | Ballast-Nedam Groep N.V. | A method of dredging and dredging implement |
US4418484A (en) * | 1979-11-15 | 1983-12-06 | Ballast-Nedam Groep N.V. | Method of dredging and dredging implement |
US4474251A (en) * | 1980-12-12 | 1984-10-02 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
EP0062111A2 (en) * | 1980-12-12 | 1982-10-13 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4389071A (en) * | 1980-12-12 | 1983-06-21 | Hydronautics, Inc. | Enhancing liquid jet erosion |
US4681264A (en) * | 1980-12-12 | 1987-07-21 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
EP0062111A3 (en) * | 1980-12-12 | 1985-08-21 | Hydronautics, Incorporated | Enhancing liquid jet erosion |
US4497664A (en) * | 1982-10-07 | 1985-02-05 | Alsthom-Atlantique | Erosion of a solid surface with a cavitating liquid jet |
EP0108666A1 (en) * | 1982-10-07 | 1984-05-16 | Alsthom | Device for eroding a solid surface by a cavitating flow |
WO1984001528A1 (en) * | 1982-10-07 | 1984-04-26 | Alsthom Atlantique | Device for the erosion of a solid surface by a cavitation flow |
FR2534158A1 (en) * | 1982-10-07 | 1984-04-13 | Alsthom Atlantique | DEVICE FOR EROSIONING A SOLID SURFACE BY A CAVITANT FLOW |
US4531592A (en) * | 1983-02-07 | 1985-07-30 | Asadollah Hayatdavoudi | Jet nozzle |
US4852668A (en) * | 1986-04-18 | 1989-08-01 | Ben Wade Oakes Dickinson, III | Hydraulic drilling apparatus and method |
EP0245971A3 (en) * | 1986-04-18 | 1988-09-14 | Dickinson, Ben Wade Oakes, III | Hydraulic drilling apparatus and method |
EP0245971A2 (en) * | 1986-04-18 | 1987-11-19 | Dickinson, Ben Wade Oakes, III | Hydraulic drilling apparatus and method |
AU597967B2 (en) * | 1986-04-18 | 1990-06-14 | Ben Wade Oakes Dickinson Iii | Hydraulic drilling apparatus and method |
US5186389A (en) * | 1990-04-03 | 1993-02-16 | S & C Co.,Ltd. | Spray tube ultrasonic washing apparatus |
US5125582A (en) * | 1990-08-31 | 1992-06-30 | Halliburton Company | Surge enhanced cavitating jet |
US5542486A (en) * | 1990-09-04 | 1996-08-06 | Ccore Technology & Licensing Limited | Method of and apparatus for single plenum jet cutting |
US5291957A (en) * | 1990-09-04 | 1994-03-08 | Ccore Technology And Licensing, Ltd. | Method and apparatus for jet cutting |
US5199512A (en) * | 1990-09-04 | 1993-04-06 | Ccore Technology And Licensing, Ltd. | Method of an apparatus for jet cutting |
US5217163A (en) * | 1990-12-18 | 1993-06-08 | Nlb Corp. | Rotating cavitating jet nozzle |
US5086974A (en) * | 1990-12-18 | 1992-02-11 | Nlb Corp. | Cavitating jet nozzle |
US5154347A (en) * | 1991-02-05 | 1992-10-13 | National Research Council Canada | Ultrasonically generated cavitating or interrupted jet |
US5553778A (en) * | 1993-02-10 | 1996-09-10 | 3003442 Canada Inc. | Advanced sootblower nozzle design |
US5375771A (en) * | 1993-02-10 | 1994-12-27 | Jameel; Mohomed I. | Advanced sootblower nozzle design |
US5363927A (en) * | 1993-09-27 | 1994-11-15 | Frank Robert C | Apparatus and method for hydraulic drilling |
US5632349A (en) * | 1993-10-08 | 1997-05-27 | Dove; Norval R. | Vortex drill bit |
US5494124A (en) * | 1993-10-08 | 1996-02-27 | Vortexx Group, Inc. | Negative pressure vortex nozzle |
US5653298A (en) * | 1993-10-08 | 1997-08-05 | Vortexx Group, Inc. | Vortex method |
US5785258A (en) * | 1993-10-08 | 1998-07-28 | Vortexx Group Incorporated | Method and apparatus for conditioning fluid flow |
US5921476A (en) * | 1993-10-08 | 1999-07-13 | Vortexx Group Incorporated | Method and apparatus for conditioning fluid flow |
US6065683A (en) * | 1993-10-08 | 2000-05-23 | Vortexx Group, Inc. | Method and apparatus for conditioning fluid flow |
US5862871A (en) * | 1996-02-20 | 1999-01-26 | Ccore Technology & Licensing Limited, A Texas Limited Partnership | Axial-vortex jet drilling system and method |
US5992763A (en) * | 1997-08-06 | 1999-11-30 | Vortexx Group Incorporated | Nozzle and method for enhancing fluid entrainment |
US5941461A (en) * | 1997-09-29 | 1999-08-24 | Vortexx Group Incorporated | Nozzle assembly and method for enhancing fluid entrainment |
US6200486B1 (en) | 1999-04-02 | 2001-03-13 | Dynaflow, Inc. | Fluid jet cavitation method and system for efficient decontamination of liquids |
US6221260B1 (en) | 1999-04-02 | 2001-04-24 | Dynaflow, Inc. | Swirling fluid jet cavitation method and system for efficient decontamination of liquids |
US6705396B1 (en) * | 1999-10-04 | 2004-03-16 | Bip Technology Ltd | Method and apparatus for producing fluid cavitation |
US6702204B2 (en) | 2000-03-01 | 2004-03-09 | Bip Technology, Ltd. | Cavitating jet |
US6555002B2 (en) | 2000-10-06 | 2003-04-29 | Premier Wastwater International, Llc | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
US6605220B2 (en) | 2000-10-06 | 2003-08-12 | Premier Wastewater International, Inc. | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
US20040007523A1 (en) * | 2000-10-06 | 2004-01-15 | Premier Wastewater International, Llc | Apparatus and method for wastewater treatment with enhanced solids reduction (ESR) |
US20090140067A1 (en) * | 2007-11-29 | 2009-06-04 | Vedanth Srinivasan | Devices and Methods for Atomizing Fluids |
US7617993B2 (en) * | 2007-11-29 | 2009-11-17 | Toyota Motor Corporation | Devices and methods for atomizing fluids |
US20090227185A1 (en) * | 2008-03-10 | 2009-09-10 | David Archibold Summers | Method and apparatus for jet-assisted drilling or cutting |
US8257147B2 (en) | 2008-03-10 | 2012-09-04 | Regency Technologies, Llc | Method and apparatus for jet-assisted drilling or cutting |
WO2018018662A1 (en) * | 2016-07-26 | 2018-02-01 | 江苏大学 | Method and device for cavitation accumulation processing |
WO2024089282A1 (en) | 2022-10-28 | 2024-05-02 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Device, construction kit, and method for generating a pulsed liquid jet which contains cavitation bubbles |
DE102022211480A1 (en) | 2022-10-28 | 2024-05-08 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Device and method for generating a pulsating liquid jet containing cavitation bubbles for the cavity-forming removal of material from solid bodies, in particular rocks |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: T-HYDRONAUTICS, INC., A CORP. OF TX, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HYDRONAUTICS, INCORPORATED A CORP. OF MD;REEL/FRAME:004134/0357 Effective date: 19830509 Owner name: T-HYDRONAUTICS, INC., 6500 TRACOR LANE AUSTIN, TX Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HYDRONAUTICS, INCORPORATED A CORP. OF MD;REEL/FRAME:004134/0357 Effective date: 19830509 |
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Owner name: TORONTO-DOMINION BANK, THE, AS AGENT Free format text: SECURITY INTEREST;ASSIGNOR:TRACOR, INC.,;REEL/FRAME:004810/0246 Effective date: 19871216 |
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Owner name: TORONTO-DOMINION BANK, THE Free format text: SECURITY INTEREST;ASSIGNORS:TRACOR, INC.;LITTLEFUSE, INC.;TRACOR AEROSPACE, INC.;AND OTHERS;REEL/FRAME:005234/0127 Effective date: 19880801 Owner name: BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIA Free format text: SECURITY INTEREST;ASSIGNORS:TORONTO-DOMINION BANK;TRACOR, INC.;REEL/FRAME:005224/0276 Effective date: 19880801 Owner name: BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIA Free format text: SECURITY INTEREST;ASSIGNOR:TRACOR, INC.;REEL/FRAME:005217/0247 Effective date: 19880801 Owner name: BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIA Free format text: SECURITY INTEREST;ASSIGNOR:TRACOR INC.;REEL/FRAME:005217/0224 Effective date: 19880801 Owner name: BANK OF AMERICA AS AGENT Free format text: SECURITY INTEREST;ASSIGNOR:TORONTO-DOMINION BANK, THE;REEL/FRAME:005197/0122 Effective date: 19880801 |
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Owner name: TRACOR, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION AS COLLATERAL AGENT;REEL/FRAME:005957/0562 Effective date: 19911220 Owner name: TRACOR, INC. Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BANK OF AMERICA NATIONAL TRUST AND SAVINGS ASSOCIATION AS COLLATERAL AGENT;REEL/FRAME:005957/0542 Effective date: 19911227 |