US20220259945A1 - Device for treating a bottom-hole formation wellbore - Google Patents

Device for treating a bottom-hole formation wellbore Download PDF

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Publication number
US20220259945A1
US20220259945A1 US17/597,594 US201917597594A US2022259945A1 US 20220259945 A1 US20220259945 A1 US 20220259945A1 US 201917597594 A US201917597594 A US 201917597594A US 2022259945 A1 US2022259945 A1 US 2022259945A1
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US
United States
Prior art keywords
chemical composition
weight
combustible chemical
wellbore
ammonium nitrate
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.)
Pending
Application number
US17/597,594
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English (en)
Inventor
Jordan BRENNAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAMROCK CANADA Inc
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LAMROCK CANADA Inc
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Filing date
Publication date
Application filed by LAMROCK CANADA Inc filed Critical LAMROCK CANADA Inc
Publication of US20220259945A1 publication Critical patent/US20220259945A1/en
Pending legal-status Critical Current

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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
    • E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/008—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using chemical heat generating means
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • 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
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
    • 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
    • E21B43/25—Methods for stimulating production
    • E21B43/255—Methods for stimulating production including the injection of a gaseous medium as treatment fluid into the formation

Definitions

  • the present invention relates to a device for treating a wellbore and, in particular, to a device which generates hydrochloric acid gas, hydrofluoric acid gas or a combination thereof to treat a bottom-hole of a wellbore.
  • a decrease in the permeability of a bottom-hole formation of a wellbore may result in a decrease in hydrocarbon recovery.
  • the decrease in the permeability of the bottom-hole formation may be the result of dilatation due to asphaltic deposits or volumetric readjustments of bore space structure.
  • the decrease in the permeability of the bottom-hole formation may be the result of clogging from clay swelling or deposits of foreign matter such as mechanical impurities, filtrates, well knitting, drill-in fluids, well development fluids, and cement.
  • Sand and paraffin-hydrate plugs are also known to cause a decrease in the permeability of the bottom-hole formation as are calcium carbonate scale, calcium sulfate scale, and other scale. It is therefore desirable to treat the bottom-hole formation of a wellbore to increase the permeability of a bottom-hole formation and increase hydrocarbon recovery.
  • the device comprises a firing head and seal block assembly at a proximal end thereof and a bullnose assembly at a distal end thereof.
  • a carrier tube extends between the firing head and seal block assembly and the bullnose assembly.
  • the carrier tube contains a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • a dispersion tube extends from the carrier tube.
  • the dispersion tube has a lateral opening. The lateral opening may be a slot or an aperture.
  • the combustible chemical composition may comprise between 30% and 60% by weight hexachloroethane and between 40% and 70% by weight ammonium nitrate.
  • the combustible chemical composition may alternatively comprise between 30% and 60% by weight polyvinyl chloride and between 40% and 70% by weight ammonium nitrate.
  • the combustible chemical composition may still alternatively comprise between 0% and 5% by weight polyvinyl chloride, between 25% and 55% by weight hexachloroethane, and between 40% and 70% by weight ammonium nitrate.
  • the combustible chemical composition may still yet alternatively comprise between 5% and 25% by weight polytetrafluoroethylene, between 25% and 55% by weight hexachloroethane, and between 40% and 70% by weight ammonium nitrate.
  • the combustible chemical composition may be disposed in a sleeve.
  • the sleeve may be a polyvinyl chloride sleeve.
  • the combustible chemical composition may include a plurality of solid puck shaped members.
  • the combustible chemical composition may further include an adhesive binding adjacent ones of the solid puck shaped members.
  • the combustible chemical composition may further include a combustion catalyst.
  • FIG. 1 is an elevation, partially sectional, view showing a device for treating a bottom-hole formation of a vertical wellbore
  • FIG. 2 is an exploded, perspective view of the device for treating a bottom-hole formation of a wellbore shown in FIG. 1 ;
  • FIG. 3 is an elevation, fragmentary and partially sectional, view of the device for treating a bottom-hole formation of a wellbore shown in FIG. 1 ;
  • FIG. 4 is an exploded, perspective view of another device for treating a bottom-hole formation of a wellbore.
  • FIG. 5 is an exploded, perspective view of still another device for treating a bottom-hole formation of a wellbore.
  • FIG. 1 there is shown a device 10 for treating a bottom-hole formation 12 of a wellbore 14 .
  • the device 10 is lowered into the wellbore 14 by a wireline 16 in this example.
  • a wireline 16 in this example.
  • coiled tubing or other suitable means may be employed to lower the device 10 into the wellbore 14 .
  • the wellbore 14 is cased with a perforated casing 18 .
  • the device 10 may also be employed to treat a wellbore provided with a slotted liner or an open hole wellbore.
  • the device 10 may be deployed in a vertical wellbore or horizontal wellbore.
  • the device may be deployed in a producing wellbore or an injection wellbore.
  • the device 10 is shown in greater detail in FIG. 2 .
  • the device 10 comprises a firing head and sealing block assembly 30 at a proximal end thereof and a bullnose assembly 32 at a distal end thereof.
  • a proximal end of a spacer tube 34 is coupled to the firing head and sealing block assembly 30 .
  • a carrier tube 36 is coupled to a distal end of the spacer tube 34 .
  • a dispersion tube 38 is coupled to a distal end of the carrier tube 36 .
  • a distal end of the dispersion tube is coupled to the bullnose assembly 32 .
  • There is a plurality of openings in the dispersion tube 38 which, in this example, are in the form of slots 40 a and 40 b.
  • the carrier tube 36 contains a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • FIG. 3 shows a combustible chemical composition 42 contained in the carrier tube 36 .
  • the combustible chemical composition 42 is contained in the carrier tube 36 and comprises a plurality of puck shaped members, for example, puck shaped member 44 a and 44 b which are fitted into the carrier tube 36 .
  • a charge wire 46 provides a charge to combust the combustible chemical composition 42 contained in the carrier tube 36 .
  • at least one of the puck shaped members is a combustion catalyst comprising epoxy resin, potassium dichromate, and ammonium nitrate.
  • a combustion catalyst is not required, but any suitable combustion catalyst may be employed.
  • the hydrochloric acid gas or hydrofluoric acid gas or a combination thereof, generated when the combustible chemical composition 42 contained in the carrier tube 36 flows into the dispersion tube 38 through the slots 40 a and 40 b in the dispersion tube 38 .
  • Examples of the combustible chemical compositions are set out below. Examples 1-3 and 5-7 generate hydrochloric acid gas and examples 4 and 8 generate hydrochloric acid gas and hydrofluoric acid gas.
  • Chlorinated polyvinyl chloride 0% to 5% Hexachloroethane 25% to 55% Ammonium nitrate 40% to 70% Potassium Dichromate 2% and 12%.
  • the device 10 may also be employed to treat a wellbore provided with a slotted liner or an open hole wellbore. It will also be understood by a person skilled in the art that the device 10 may be deployed in a vertical wellbore or horizontal wellbore. It will further be understood by a person skilled in the art that the device may be deployed in a producing wellbore or an injection wellbore. A perforating gun may be used with the device 10 . Packers may also be employed to isolate the devices.
  • FIG. 4 shows another device 50 for treating a bottom-hole formation of a wellbore.
  • the device 50 is substantially similar to the device shown in FIGS. 1 to 3 with the notable exception that the dispersion tube 52 has lateral openings in the form of apertures 54 a and 54 b.
  • FIG. 5 shows still another device 60 for treating a bottom-hole formation of a wellbore.
  • the device 60 is substantially similar to the device shown in FIGS. 1 to 3 with the notable exception that there is no dispersion tube and the carrier tube 62 has lateral openings in the form of apertures 64 a and 64 b.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Fuel Cell (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Drying Of Semiconductors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Gas Separation By Absorption (AREA)
US17/597,594 2019-07-12 2019-07-12 Device for treating a bottom-hole formation wellbore Pending US20220259945A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA2019/050970 WO2021007645A1 (fr) 2019-07-12 2019-07-12 Dispositif de traitement d'un puits de forage de formation de fond de trou

Publications (1)

Publication Number Publication Date
US20220259945A1 true US20220259945A1 (en) 2022-08-18

Family

ID=74209645

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/597,594 Pending US20220259945A1 (en) 2019-07-12 2019-07-12 Device for treating a bottom-hole formation wellbore

Country Status (10)

Country Link
US (1) US20220259945A1 (fr)
EP (1) EP3997305A4 (fr)
AU (1) AU2019457059A1 (fr)
BR (1) BR112022000567A2 (fr)
CA (1) CA3143625A1 (fr)
CO (1) CO2022001421A2 (fr)
EC (1) ECSP22002883A (fr)
IL (1) IL289755A (fr)
PE (1) PE20221246A1 (fr)
WO (1) WO2021007645A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024012718A2 (fr) 2022-07-14 2024-01-18 ISOL8 (Holdings) Limited Matériau formant barrière ou bouchon

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076507A (en) * 1958-05-16 1963-02-05 William G Sweetman Chemical cutting method and apparatus for use in wells
US3145770A (en) * 1961-01-27 1964-08-25 Pan American Petroleum Corp Method and apparatus for stimulating and testing earth formations
US4352397A (en) * 1980-10-03 1982-10-05 Jet Research Center, Inc. Methods, apparatus and pyrotechnic compositions for severing conduits
RU2329374C2 (ru) * 2006-05-22 2008-07-20 Казанский государственный энергетический университет (КГЭУ) Устройство для обработки призабойной зоны скважины и способ обработки призабойной зоны скважины
US8327926B2 (en) 2008-03-26 2012-12-11 Robertson Intellectual Properties, LLC Method for removing a consumable downhole tool
US20110315387A1 (en) * 2010-06-25 2011-12-29 Marat Shatikovich Gamerov System and method for cleaning a bottom-hole formation zone of a wellbore
CA2716975C (fr) * 2010-09-17 2018-05-01 Lamrock Canada Incorporated Dispositif servant a traiter une zone de formation de fond de puits d'un puits de forage
RU2487237C1 (ru) * 2012-03-20 2013-07-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский государственный энергетический университет" (ФГБОУ ВПО "КГЭУ") Устройство для обработки призабойной зоны скважины и способ обработки призабойной зоны скважины
WO2019153093A1 (fr) * 2018-02-09 2019-08-15 Lamrock Canada Incorporated Dispositif de traitement d'un puits de forage de formation de fond de trou

Also Published As

Publication number Publication date
AU2019457059A1 (en) 2022-03-03
WO2021007645A1 (fr) 2021-01-21
ECSP22002883A (es) 2022-04-29
PE20221246A1 (es) 2022-08-15
EP3997305A1 (fr) 2022-05-18
CO2022001421A2 (es) 2022-04-29
CA3143625A1 (fr) 2021-01-21
EP3997305A4 (fr) 2023-07-26
IL289755A (en) 2022-07-01
BR112022000567A2 (pt) 2022-03-15

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