US2680486A - Method and apparatus for well operations employing hydrogen peroxide - Google Patents

Method and apparatus for well operations employing hydrogen peroxide Download PDF

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Publication number
US2680486A
US2680486A US69212A US6921249A US2680486A US 2680486 A US2680486 A US 2680486A US 69212 A US69212 A US 69212A US 6921249 A US6921249 A US 6921249A US 2680486 A US2680486 A US 2680486A
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hydrogen peroxide
fuel
supply
jet
well
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US69212A
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Paul G Carpenter
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Phillips Petroleum Co
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Phillips Petroleum Co
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/02—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground by explosives or by thermal or chemical means

Definitions

  • Figure 1 is a cross sectional view of a well containing apparatus embodying the present invention and illustrates a process embodying the present invention.
  • Figure 2 is Figure 5 is a cross sectional view of a third form of apparatus which may be substituted for the lowermost portions of Figures 1 or 3.
  • Burner apparatus 1 up the cable l Apparatus 1! comprises an upper tank It and a lower tank
  • and 26 are made into concentric conduits 3'6 and 37, respectively, in order to form a stator for a reaction jet turbine having a rotor 38.
  • head 38 may be made in several pieces as indicated which may be connected together in any suitable manner but as the specific construction of head 38 is not part of the present invention, no further details of construction are given.
  • this jet can be single direction as shown in Figures 3 and 4.
  • a modified burning apparatus generally designated as H may be oriented in the hole by surveying it in on the end of a rigid pipe or rod line consisting of pipes 41 and 48 connected by couplings 69.
  • it may be provided with spring arms 5! which act as spacing means to center the device H in the center of the well hole.
  • Pipe 53 may be connected either to the hydrogen peroxide tank l6 or the fuel tank I! and the other pipe 54 is connected to the opposite tank.
  • the liquid coming down pipe 53 passes through nozzle 55 to link and burn with the liquid coming down pipe 54 and pass out the jet orifice 5'! as a hot flame capable of burning its way through steel and other metals and other hard materials.
  • the jet When downward drilling is desired the jet may be directed downwardly as shown in Figure 5 where pipe 53 is connected to the hydrogen peroxide tank or the fuel tank while pipe 59 is connected to the opposite tank.
  • the liquid coming down pipe 53 goes through jet 6! and meeting with the other liquid burns and passes out jet nozzle 82 in the form of a jet of flame.
  • any device H will now Operation
  • the hydrogen peroxide should be concentrated until it is at least 10% by weight hydrogen peroxide and the remainder being water and a decompotype known to the
  • higher concentrations of hydrogen peroxide are preferred and a concentration of 98% by weight of hydrogen peroxide gives excellent results.
  • a device such as an automatic spark plug could be positioned adjacent the exit 39 to ignite the fuel and hydrogen peroxide.
  • a fuel oil of a gas oil grade is preferred although kerosenes, napthas, gasolines and liquified petroleum gases may be employed. Liquid hydrocarbons are preferred.
  • FIG l the apparatus H is lowered into the well with time clocks 28 and 33 set to give enough time to position the device at the elevation desired.
  • Time clocks 28 and 33 then open inert gases above 21 hydrogen peroxide, respectively, through pipes 31 and 2t and out spiral passages 39 and G! into space M where they meet and spontaneously ignite (or are ignited by a spark plug not shown).
  • the result ing flame burns an annular groove through casing 9 into wall 8 of the well.
  • any chemist can calculate the proportions of hydrogen peroxide and fuel (depending on the type of fuel) to provide an oxidizing flame in order to burn up steel or aluminum casing or the like.
  • valves 2'? and 32 have been shown controlled by time clccks 23 and 33, it is obvious that they could be replaced by electric solenoids controlling these valves from the surface of the ground by means of an electrical circuit including a source of electrical power, switch and wires leading to the solenoids.
  • valves 21 and 32 could be provided with a mechanical operating linkage having a portion extending adjacent cable i2 to be operated by a go-devil or a piece of pipe threaded on cable 12 and dropped into the well.
  • the flame and jet produced by this apparatus is useful in dri ling wells in which case the jet is directed downwardly at 82 as shown in Figure 5. This jet impinges on the bottom of the hole 1 and removes material therefrom, thereby deepening the hole.
  • combustible organic materials such as methyl, or ethyl alcohol, can be employed as fuel, but are not as good as those fuels enumerated in the claims because their heat of combustion is less.
  • Apparatus for producing a jet of burning hydrogen peroxide and fuel comprising in combination a tanl for said fuel, means to position said tanks in a well, means to supply gas pressure to the liquids in said ta. ks to eject said liquids, outlet means for said tanks leading to adjacent disand 23 force charge conduits comprising a rotatable reaction turbine, check valves in said venting back flow in each outlet means, and means to open said shutoff valves comprising clock means the same at a predetermined time.
  • Apparatus for producing a jet of burning set to open 3.
  • Apparatus for producing a jet of burning hydrogen peroxide and fuel comprising in combination a tank for said hydrogen peroxide, a tank for said fuel,
  • Apparatus for producing a jet of hurning remove the same.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Spray-Type Burners (AREA)

Description

June 8, 1954 P G CARPENTER METHOD AND APPARATUS FOR WELL OPERATIONS EMPLOYING HYDROGEN PERQXIDE Filed Jan. 4, 1949 0 gm; l I I I l I N I I u u co m INVENTOR. P. G. CARPENTER ATTORNEYS Patented June 8, 1954 UNITED STATES AT OFFICE METHOD AND AP PARATUS FOR WELL OPERATIONS EMPLOYING HYDROGEN PEROXIDE Paul G. Carpenter, Bartlesville, Okla", assignor to Phillips P of Delaware Application January 4,
roleuin Company, a corporation 1949, Serial No. 69,212
12 Claims. (Cl. 1661) This invention relates to processes and appa ratus for carrying out operations in a Well.
hydrogen peroxide. In another aspect it relates to perforating a hole in a pipe and/ or the wall of a Well by a single flame. In another specific the accompanying drawings.
Figure 1 is a cross sectional view of a well containing apparatus embodying the present invention and illustrates a process embodying the present invention.
Figure 2 is Figure 5 is a cross sectional view of a third form of apparatus which may be substituted for the lowermost portions of Figures 1 or 3.
In Figure 1 a which is lined with pipe or casing Suspended in hole 1 is a burner apparatus generally designated I I. Burner apparatus 1 up the cable l Apparatus 1! comprises an upper tank It and a lower tank The fuel from tank i7 manner through conduit 3! controlled by a time and as a safety feature a check valve 3:3 prevents back fiow in conduit 3! Conduits 3| and 26 are made into concentric conduits 3'6 and 37, respectively, in order to form a stator for a reaction jet turbine having a rotor 38. lhe fuel in outer pipe 36 is led into upper spiral passages 39 of rotor 38 while the hydrogen peroxide coming down the inside of inner pipe 31 is led to lower spiral passages For purposes of disassembly and repair, head 38 may be made in several pieces as indicated which may be connected together in any suitable manner but as the specific construction of head 38 is not part of the present invention, no further details of construction are given.
As shown in Figure 2 the jets of fuel d2 emerging through passages 39 in a non-radial direction cause rotation of head 38 in the direction indi cated by arrow 53 as is common in reaction jet turbines and the hydrogen peroxide emerging through similar spiral openings M also causes rotation of head 38 in the same direction as 43.
When the hydrogen peroxide and the suitable fuel come together, they ignite spontaneously and burn, and in have burned an annular groove M through the wall of pipe and into the ground 8 to such an extent as to sever lower portion 46 of pipe 9 from the main body of the pipe.
If desired this jet can be single direction as shown in Figures 3 and 4. In Figure 3 a modified burning apparatus generally designated as H may be oriented in the hole by surveying it in on the end of a rigid pipe or rod line consisting of pipes 41 and 48 connected by couplings 69. To prevent minor amounts of movement when the jet is turned on, and/ or to space the jet the desired distance from the wall and to center the device II, it may be provided with spring arms 5! which act as spacing means to center the device H in the center of the well hole.
The jet 52 at the bottom of be discussed with relation to Figure 4 where it is shown in enlarged form. Pipe 53 may be connected either to the hydrogen peroxide tank l6 or the fuel tank I! and the other pipe 54 is connected to the opposite tank. The liquid coming down pipe 53 passes through nozzle 55 to link and burn with the liquid coming down pipe 54 and pass out the jet orifice 5'! as a hot flame capable of burning its way through steel and other metals and other hard materials.
When downward drilling is desired the jet may be directed downwardly as shown in Figure 5 where pipe 53 is connected to the hydrogen peroxide tank or the fuel tank while pipe 59 is connected to the opposite tank. The liquid coming down pipe 53 goes through jet 6! and meeting with the other liquid burns and passes out jet nozzle 82 in the form of a jet of flame.
concentrated .in any device H will now Operation In order to obtain efficient operation, the hydrogen peroxide should be concentrated until it is at least 10% by weight hydrogen peroxide and the remainder being water and a decompotype known to the However, higher concentrations of hydrogen peroxide are preferred and a concentration of 98% by weight of hydrogen peroxide gives excellent results. While it is preferred to use a self-igniting fuel, a device such as an automatic spark plug could be positioned adjacent the exit 39 to ignite the fuel and hydrogen peroxide. employ a self-igniting fuel selected from the group of hydrocarbons, pyrocatechol, alkyl pyrocatechols and hydrazine prior art.
hydrate, and of the hydrocarbons, a fuel oil of a gas oil grade is preferred although kerosenes, napthas, gasolines and liquified petroleum gases may be employed. Liquid hydrocarbons are preferred.
In Figure l the apparatus H is lowered into the well with time clocks 28 and 33 set to give enough time to position the device at the elevation desired. Time clocks 28 and 33 then open inert gases above 21 hydrogen peroxide, respectively, through pipes 31 and 2t and out spiral passages 39 and G! into space M where they meet and spontaneously ignite (or are ignited by a spark plug not shown). The result ing flame burns an annular groove through casing 9 into wall 8 of the well. Obviously if desired any chemist can calculate the proportions of hydrogen peroxide and fuel (depending on the type of fuel) to provide an oxidizing flame in order to burn up steel or aluminum casing or the like.
While valves 2'? and 32 have been shown controlled by time clccks 23 and 33, it is obvious that they could be replaced by electric solenoids controlling these valves from the surface of the ground by means of an electrical circuit including a source of electrical power, switch and wires leading to the solenoids. Obviously, valves 21 and 32 could be provided with a mechanical operating linkage having a portion extending adjacent cable i2 to be operated by a go-devil or a piece of pipe threaded on cable 12 and dropped into the well.
Cutting casing 9 at A l as illustrated in Figure l by lowering device ll below the bottom of casing 46 the surface of well 8 can be cleaned of deposits in the same manner with the flame of fuel and hydrogen peroxide.
If it is desired to make a perforation in casing 9 or the wall 8 which perforation will extend back into the ground a considerable distance for the release of oil into the well for other processes, the apparatus shown in Figure 3 is employed and if desired jet 52 can be positioned and oriented by surveying the suspension means .1 into the well. By supplying an exhaust of hydrogen peroxide, oxidation or spalling can be enhanced and solid materials present combusted in the perforation.
The flame and jet produced by this apparatus is useful in dri ling wells in which case the jet is directed downwardly at 82 as shown in Figure 5. This jet impinges on the bottom of the hole 1 and removes material therefrom, thereby deepening the hole.
While I have shown in the drawings and described in the specification a number of processes and means for carrying out these processes, these have been given for purposes of illustration and the invention is not limited thereto but is as defined in the following claims.
Other combustible organic materials, such as methyl, or ethyl alcohol, can be employed as fuel, but are not as good as those fuels enumerated in the claims because their heat of combustion is less.
Having described my invention, 1 claim:
1. Apparatus for producing a jet of burning hydrogen peroxide and fuel comprising in combination a tanl for said fuel, means to position said tanks in a well, means to supply gas pressure to the liquids in said ta. ks to eject said liquids, outlet means for said tanks leading to adjacent disand 23 force charge conduits comprising a rotatable reaction turbine, check valves in said venting back flow in each outlet means, and means to open said shutoff valves comprising clock means the same at a predetermined time.
2. Apparatus for producing a jet of burning set to open 3. Apparatus for producing a jet of burning hydrogen peroxide and fuel comprising in combination a tank for said hydrogen peroxide, a tank for said fuel,
a well, means to supply said shutoff valves.
4. Apparatus for producing a jet of hurning remove the same.
7. The process of removing solid material from a portion of a wall of a Well bore in the earth comprising positioning a supply point, ejecting contacting said hydrofuel, combusting the said pipe to the pipe to sever the same.
10. The process of bore comprising positioning a supply of at least turbine.
References Cited in the file of this patent UNITED STATES PATENTS Number 7 Name Date 1,352,381 Reynolds Sept. 7, 1920 1,433,046 Thacher Oct. 24, 1922 1,510,925 Kaiser et a1 Oct. '7, 1924 (Other references on following page) 8 UNITED STATES PATENTS Number Name Date Number Name t 2,525,391 Bates o 1 1950 1 532 134 Mims 27, 1926 2,571,536 Wat-kins 16, 1951 1,639,008 Shannon et a1. Aug. 16, 192'] 5 OTHER, E NCES fiigg gym g; 3 13%; Little Industrial Bulletin, No. 220, April 1946, 22 9 ,4 9 I 0 14: 941 pages 2 221 232 a1 N52 4 1941 Rockets August 1946 page 228351O Potter 5 1942 Coast Art'llery Journal, January-February 2,327,498 Burch Aug. 24, 1943 10 1943' pages 27 and 2,327,508 Craig Aug. 24, 1943 o k t Feb 1 ,1
2,436,036 Defenbaugh Feb. 1'7, 1948

Claims (2)

1. APPARATUS FOR PRODUCING A JET OF BURNING HYDROGEN PEROXIDE AND FUEL COMPRISING IN COMBINATION A TANK FOR SAID HYDROGEN PEROXIDE, A TANK FOR SAID FUEL, MEANS TO POSITON SAID TANKS IN A WELL, MEANS TO SUPPLY GAS PRESSURE TO THE LIQUIDS IN SAID TANKS TO EJECT SAID LIQUIDS, OUTLET MEANS FOR SAID TANKS LEADING TO ADJACENT DISCHARGE CONDUITS COMPRISING A ROTATABLE REACTION TURBINE, CHECK VALVES IN SAID OUTLET MEANS PREVENTING BACK FLOW THERETHROUGH, A SHUTOFF VALVE IN EACH OUTLET MEANS, AND MEANS TO OPEN SAID SHUTOFF VALVES COMPRISING CLOCK MEANS SET TO OPEN THE SAME AT A PREDETERMINED TIME.
6. THE PROCESS OF REMOVING SOLID MATERIAL FROM A PORTION OF A WALL OF A WELL BORE IN THE EARTH COMPRISING POSITIONING A SUPPLY OF AT LEAST 70% BY WEIGHT HYDROGEN PEROXIDE ADJACENT THE POINT OF SAID REMOVAL IN SAID BORE HOLE, EJECTING SAID HYDROGEN PEROXIDE FROM SAID SUPPLY, POSITIONING A SUPPLY OF A FUEL SUITABLE FOR COMBUSTION WITH HYDROGEN PEROXIDE SELECTED FROM THE GROUP CONSISTING OF LIQUID HYDROCARBONS, PYROCATECHOL, ALKYL PYROCATECHOLS, AND HYERAZINE HYDRATE, ADJACENT SAID POINT, EJECTING SAID FUEL FROM SAID SUPPLY, CONTACTING SAID HYDROGEN PEOXIDE AND SAID FUEL, COMBUSTING THE MAJOR PORTION OF SAID FUEL AND THEREBY CONSUMING AT LEAST A PORTION
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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029770B (en) * 1955-04-22 1958-05-14 William George Sweetman Method and device for flame cutting pipes or the like within deep boreholes
US2918125A (en) * 1955-05-09 1959-12-22 William G Sweetman Chemical cutting method and apparatus
US3076507A (en) * 1958-05-16 1963-02-05 William G Sweetman Chemical cutting method and apparatus for use in wells
US3235006A (en) * 1963-10-11 1966-02-15 Pan American Corp Method of supplying heat to an underground formation
US3299972A (en) * 1964-05-21 1967-01-24 Stanley A Karlsen Pulverizing earth and rock drilling head
US3461577A (en) * 1965-12-15 1969-08-19 Southwest Res Inst Method of and an apparatus for displacing materials
US3499801A (en) * 1968-04-23 1970-03-10 Saxton Seward W Heat-cutting method
US4389261A (en) * 1981-07-10 1983-06-21 Etablissements Somalor-Ferrari `Somafer` Process for cutting metal members by means of jets of gas which issue at the periphery of a rotary disc
US4449698A (en) * 1983-03-31 1984-05-22 Uniox Srl Welding & Cutting Autogenous portable welding apparatus
US4453597A (en) * 1982-02-16 1984-06-12 Fmc Corporation Stimulation of hydrocarbon flow from a geological formation
US4475596A (en) * 1983-01-31 1984-10-09 Papst Wolfgang A Well stimulation system
US4479540A (en) * 1981-06-05 1984-10-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gasification of coal
US6189618B1 (en) * 1998-04-20 2001-02-20 Weatherford/Lamb, Inc. Wellbore wash nozzle system
US20070089911A1 (en) * 2005-05-10 2007-04-26 Moyes Peter B Downhole tool
US20100218993A1 (en) * 2008-10-08 2010-09-02 Wideman Thomas W Methods and Apparatus for Mechanical and Thermal Drilling
US20100294493A1 (en) * 2007-10-12 2010-11-25 Anthony Robert Holmes Goodwin Methods and apparatus to change the mobility of formation fluids using thermal and non-thermal stimulation
US20110132609A1 (en) * 2006-09-18 2011-06-09 Schlumberger Technology Corporation Formation fluid sampling tools and methods utilizing chemical heating
EP2748400A4 (en) * 2011-10-06 2016-07-13 Sandvik Mining & Constr Oy Fuel tank
WO2017199037A1 (en) * 2016-05-18 2017-11-23 Spex Engineering (Uk) Limited Tool for severing a downhole tubular by a stream of combustion products
US11028675B2 (en) 2014-08-15 2021-06-08 Global Oil EOR Systems, Ltd. Hydrogen peroxide steam generator for oilfield applications
US20240003210A1 (en) * 2022-07-01 2024-01-04 Robertson Intellectual Properties, LLC Borehole conduit cutting apparatus with swirl generator
WO2024005848A1 (en) * 2022-07-01 2024-01-04 Robertson Intellectual Properties, LLC Radial cutting apparatus with swirl diverter

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US1352381A (en) * 1918-11-18 1920-09-07 Reynolds Torch Mfg Company Oxyacetylene-torch for cutting tubes
US1433046A (en) * 1921-01-27 1922-10-24 John H Thacher Oil-well cleaner
US1510925A (en) * 1921-02-08 1924-10-07 Kaiser Isaac De Oil-wel heater
US1582184A (en) * 1924-03-03 1926-04-27 Sidney W Mims Method and means for perforating well casings
US1639008A (en) * 1926-04-19 1927-08-16 Richard S Shannon Portable self-contained oil-well heater
US1692924A (en) * 1926-05-19 1928-11-27 Brown Brothers Welding Company Burner holder
US2144208A (en) * 1935-08-19 1939-01-17 Hercules Oil Well Shooting Com Method and means for increasing the flow of fluid from well casings
US2259419A (en) * 1937-10-23 1941-10-14 Dow Chemical Co Well drilling
US2261292A (en) * 1939-07-25 1941-11-04 Standard Oil Dev Co Method for completing oil wells
US2283510A (en) * 1941-06-02 1942-05-19 Standard Oil Co California Method of drilling wells
US2327508A (en) * 1942-01-07 1943-08-24 Linde Air Prod Co Blowtorch
US2327498A (en) * 1941-04-18 1943-08-24 Linde Air Prod Co Blowtorch
US2436036A (en) * 1944-09-14 1948-02-17 Loyd F Defenbaugh Means for severing well casings and the like in place in the well
US2525391A (en) * 1948-07-12 1950-10-10 Edith L O Neill Apparatus for cutting drill pipes
US2571636A (en) * 1947-10-14 1951-10-16 Lewis H Watkins Removal of metallic obstructions in well borings by oxidation

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352381A (en) * 1918-11-18 1920-09-07 Reynolds Torch Mfg Company Oxyacetylene-torch for cutting tubes
US1433046A (en) * 1921-01-27 1922-10-24 John H Thacher Oil-well cleaner
US1510925A (en) * 1921-02-08 1924-10-07 Kaiser Isaac De Oil-wel heater
US1582184A (en) * 1924-03-03 1926-04-27 Sidney W Mims Method and means for perforating well casings
US1639008A (en) * 1926-04-19 1927-08-16 Richard S Shannon Portable self-contained oil-well heater
US1692924A (en) * 1926-05-19 1928-11-27 Brown Brothers Welding Company Burner holder
US2144208A (en) * 1935-08-19 1939-01-17 Hercules Oil Well Shooting Com Method and means for increasing the flow of fluid from well casings
US2259419A (en) * 1937-10-23 1941-10-14 Dow Chemical Co Well drilling
US2261292A (en) * 1939-07-25 1941-11-04 Standard Oil Dev Co Method for completing oil wells
US2327498A (en) * 1941-04-18 1943-08-24 Linde Air Prod Co Blowtorch
US2283510A (en) * 1941-06-02 1942-05-19 Standard Oil Co California Method of drilling wells
US2327508A (en) * 1942-01-07 1943-08-24 Linde Air Prod Co Blowtorch
US2436036A (en) * 1944-09-14 1948-02-17 Loyd F Defenbaugh Means for severing well casings and the like in place in the well
US2571636A (en) * 1947-10-14 1951-10-16 Lewis H Watkins Removal of metallic obstructions in well borings by oxidation
US2525391A (en) * 1948-07-12 1950-10-10 Edith L O Neill Apparatus for cutting drill pipes

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029770B (en) * 1955-04-22 1958-05-14 William George Sweetman Method and device for flame cutting pipes or the like within deep boreholes
US2918125A (en) * 1955-05-09 1959-12-22 William G Sweetman Chemical cutting method and apparatus
US3076507A (en) * 1958-05-16 1963-02-05 William G Sweetman Chemical cutting method and apparatus for use in wells
US3235006A (en) * 1963-10-11 1966-02-15 Pan American Corp Method of supplying heat to an underground formation
US3299972A (en) * 1964-05-21 1967-01-24 Stanley A Karlsen Pulverizing earth and rock drilling head
US3461577A (en) * 1965-12-15 1969-08-19 Southwest Res Inst Method of and an apparatus for displacing materials
US3499801A (en) * 1968-04-23 1970-03-10 Saxton Seward W Heat-cutting method
US4479540A (en) * 1981-06-05 1984-10-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Gasification of coal
US4389261A (en) * 1981-07-10 1983-06-21 Etablissements Somalor-Ferrari `Somafer` Process for cutting metal members by means of jets of gas which issue at the periphery of a rotary disc
US4453597A (en) * 1982-02-16 1984-06-12 Fmc Corporation Stimulation of hydrocarbon flow from a geological formation
US4475596A (en) * 1983-01-31 1984-10-09 Papst Wolfgang A Well stimulation system
US4449698A (en) * 1983-03-31 1984-05-22 Uniox Srl Welding & Cutting Autogenous portable welding apparatus
US6189618B1 (en) * 1998-04-20 2001-02-20 Weatherford/Lamb, Inc. Wellbore wash nozzle system
US9453381B2 (en) * 2005-05-10 2016-09-27 Baker Hughes Incorporated Downhole drive force generating tool
US20070089911A1 (en) * 2005-05-10 2007-04-26 Moyes Peter B Downhole tool
US8459377B2 (en) * 2005-05-10 2013-06-11 Baker Hughes Incorporated Downhole drive force generating tool
US20130240208A1 (en) * 2005-05-10 2013-09-19 Baker Hughes Incorporated Downhole drive force generating tool
US20110132609A1 (en) * 2006-09-18 2011-06-09 Schlumberger Technology Corporation Formation fluid sampling tools and methods utilizing chemical heating
US8283174B2 (en) * 2006-09-18 2012-10-09 Schlumberger Technology Corporation Formation fluid sampling tools and methods utilizing chemical heating
US20100294493A1 (en) * 2007-10-12 2010-11-25 Anthony Robert Holmes Goodwin Methods and apparatus to change the mobility of formation fluids using thermal and non-thermal stimulation
US8555969B2 (en) * 2007-10-12 2013-10-15 Schlumberger Technology Corporation Methods and apparatus to change the mobility of formation fluids using thermal and non-thermal stimulation
US20100218993A1 (en) * 2008-10-08 2010-09-02 Wideman Thomas W Methods and Apparatus for Mechanical and Thermal Drilling
EP2748400A4 (en) * 2011-10-06 2016-07-13 Sandvik Mining & Constr Oy Fuel tank
US11028675B2 (en) 2014-08-15 2021-06-08 Global Oil EOR Systems, Ltd. Hydrogen peroxide steam generator for oilfield applications
WO2017199037A1 (en) * 2016-05-18 2017-11-23 Spex Engineering (Uk) Limited Tool for severing a downhole tubular by a stream of combustion products
EP3869001A1 (en) * 2016-05-18 2021-08-25 SPEX Corporate Holdings Ltd Tool for manipulating a tubular in a downhole environment
AU2017265923B2 (en) * 2016-05-18 2022-06-02 Spex Corporate Holdings Ltd Tool for severing a downhole tubular by a stream of combustion products
US20240003210A1 (en) * 2022-07-01 2024-01-04 Robertson Intellectual Properties, LLC Borehole conduit cutting apparatus with swirl generator
WO2024005847A1 (en) * 2022-07-01 2024-01-04 Robertson Intellectual Properties, LLC Borehole conduit cutting apparatus with swirl generator
WO2024005848A1 (en) * 2022-07-01 2024-01-04 Robertson Intellectual Properties, LLC Radial cutting apparatus with swirl diverter

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