WO2019153093A1 - Dispositif de traitement d'un puits de forage de formation de fond de trou - Google Patents

Dispositif de traitement d'un puits de forage de formation de fond de trou Download PDF

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Publication number
WO2019153093A1
WO2019153093A1 PCT/CA2019/050171 CA2019050171W WO2019153093A1 WO 2019153093 A1 WO2019153093 A1 WO 2019153093A1 CA 2019050171 W CA2019050171 W CA 2019050171W WO 2019153093 A1 WO2019153093 A1 WO 2019153093A1
Authority
WO
WIPO (PCT)
Prior art keywords
assembly
chemical composition
carrier tube
combustible chemical
combustible
Prior art date
Application number
PCT/CA2019/050171
Other languages
English (en)
Inventor
Jordan BRENNAN
Edward Brennan
Original Assignee
Lamrock Canada Incorporated
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lamrock Canada Incorporated filed Critical Lamrock Canada Incorporated
Publication of WO2019153093A1 publication Critical patent/WO2019153093A1/fr

Links

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
    • 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
    • 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
    • E21B37/06—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

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.
  • the carrier tube may have a plurality of lateral openings.
  • There may be a spacer tube extending between the firing head and seal block assembly and the carrier tube.
  • a mandrel may couple the spacer tube to the carrier tube.
  • 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 first assembly is coupled to the firing head and seal block assembly.
  • the first assembly includes a spacer tube coupled to a carrier tube.
  • the carrier tube contains a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • a second assembly is coupled to the bullnose assembly.
  • the second assembly includes a spacer tube coupled to a carrier tube, the carrier tube containing a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • the first assembly is coupled to the second assembly.
  • Charge wires electrically couple the firing head and sealing block assembly to the combustible chemical composition in the first assembly and to the combustible chemical composition in the second assembly.
  • the carrier tube of the first assembly and the carrier tube of the second assembly may each have a plurality of lateral openings.
  • a mandrel may couple the spacer tube of the first assembly to the carrier tube of the first assembly.
  • a mandrel may couple the spacer tube of the second assembly to the carrier tube of the second assembly.
  • a hang off sub may couple the first assembly to the second assembly.
  • a device for treating a bottom-hole formation of a wellbore comprises a firing head and a combustible carrier tube containing a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • a charge wire electrically couples the firing head to the combustible carrier tube.
  • 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.
  • Figure 1 is an elevation, partially sectional, view showing a device for treating a bottom-hole formation of a vertical wellbore
  • Figure 2 is an exploded, perspective view of the device for treating a bottom- hole formation of a wellbore shown in Figure 1;
  • Figure 3 is an elevation, fragmentary and partially sectional, view of the device for treating a bottom -hole formation of a wellbore shown in Figure 1;
  • Figure 4 is a perspective view of a first carrier tube of the device for treating a bottom-hole formation of a wellbore shown in Figure 1;
  • Figure 5 is a perspective view of a second carrier tube of the device for treating a bottom-hole formation of a wellbore shown in Figure 1;
  • Figure 6 is a schematic, exploded view showing a connection between a sleeve of a combustible chemical composition of the first carrier tube and a sleeve of a combustible chemical composition of the second carrier tube of the device for treating a bottom-hole formation of a wellbore of Figure 1;
  • Figure 7 is an elevation view of the sleeve of the combustible chemical composition of the first carrier tube of the device for treating a bottom-hole formation of a wellbore shown in Figure 1;
  • Figure 8 is an elevation view of the sleeve of the combustible chemical composition of the second carrier tube of the device for treating a bottom-hole formation of a wellbore shown in Figure 1.
  • 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. However, in other examples, 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 Figure 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 first spacer tube 34 is coupled to the firing head and sealing block assembly 30.
  • a first carrier tube 36 is coupled to a distal end of the first spacer tube 34.
  • a second spacer tube 38 is coupled to a distal end of the first carrier tube 36.
  • a second carrier tube 40 is coupled to a distal end of the second spacer tube 38.
  • a distal end of the second carrier tube 40 is coupled to the bullnose assembly 32.
  • the first spacer tube 34 and the first carrier tube 36 are coupled by a mandrel 42 and together form a first assembly 44 of the device 10 for treating the bottom-hole formation of the wellbore.
  • the second spacer tube 38 and the second carrier tube 40 are also coupled by a mandrel 46 and together form a second assembly 48 of the device 10 for treating the bottom-hole formation of the wellbore.
  • a hang off sub 50 couples the first assembly 44 of the device 10 for treating the bottom -hole formation of the wellbore to the second assembly 48 of the device 10 for treating the bottom -hole formation of the wellbore.
  • the first carrier tube 36 and the second carrier tube 40 each contain a combustible chemical composition which generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted.
  • Figure 3 shows a combustible chemical composition 52 contained in the first carrier tube 36 and a combustible chemical composition 54 contained in the second carrier tube 40.
  • the combustible chemical composition 52 is contained in the first carrier tube 36 and comprises a plurality of puck shaped members, for example puck shaped member 52a and 52b, which are fitted into a sleeve 53.
  • the sleeve 53 may be formed of polyvinyl chloride and there may be epoxy lining an inner surface of the sleeve 53.
  • the combustible chemical composition 54 is contained in the second carrier tube 40 and comprises a plurality of puck shaped members, for example puck shaped member 54a and 54b, which are fitted into a sleeve 55.
  • the sleeve 55 may be formed of polyvinyl chloride and there may be epoxy lining an inner surface of the sleeve 55.
  • the combustible chemical compositions 52 and 54 will combust through the respective sleeves 53 and 55.
  • a charge wire 56 provides a charge to combust the combustible chemical composition 52 contained in the first carrier tube 36.
  • a flow through charge wire 58 provides a charge to combust the combustible chemical composition 54 contained in the second carrier tube 40.
  • 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 first carrier tube 36 and the second carrier tube 40 are each respectively shown in Figures 4 and 5.
  • the first carrier tube 36 has a plurality of lateral openings, for example, slots 62a and 62b.
  • the second carrier tube 40 has a plurality of lateral openings, for example, slots 64a and 64b.
  • the combustible chemical compositions contained in the first carrier tube 36 and the second carrier tube 40 may be the same or may be different. 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 0% to 5%
  • a chlorinated polyvinyl chloride is employed.
  • any suitable polyvinyl chloride may be employed.
  • a self-levelling, chemical resistant, high performance sealant may be employed to seal each end of the device 10.
  • the sealant is a two-part polysulfide sealant offered under the trademark Thiokol®.
  • Thiokol® a two-part polysulfide sealant offered under the trademark Thiokol®.
  • silicone based sealants or other suitable sealants may be employed as an alternative to the Thiokol® sealant.
  • the device may be sealed mechanically or by other suitable means.
  • An adhesive may be employed to bind the puck shaped members.
  • the adhesive may be a cured epoxy resin system which is a mixture of an epoxy resin, a hardener and a plasticizer.
  • the epoxy resin employed may include a typical bispenol A type resin.
  • An example of an adhesive is set out below. However, it will be understood by a person skilled in the art that other suitable adhesives or binding agents may be employed.
  • Epoxy resin (DER-331®) about 80%
  • FIG. 6 there is shown a connection between the sleeve 53 of the combustible chemical composition of the first carrier tube 36 (not shown in Figure 6) and the sleeve 55 of the combustible chemical composition the second carrier tube 40 (not shown in Figure 6).
  • a firing head 66 is tethered to the wireline 16.
  • the firing head 66 is electrically connected to the sleeve 53 of the combustible chemical composition of the first carrier tube 36 by the charge wire 56.
  • the firing head 66 is also electrically connected to the sleeve 55 of the combustible chemical composition of the second carrier tube 40 by the flow through charge wire 58.
  • first switch 72 connected in series between the firing head 66 and the sleeve 53 of the combustible chemical composition of the first carrier tube 36.
  • second switch 74 connected in series between the firing head 66 and the sleeve 55 of the combustible chemical composition of the second carrier tube 40.
  • the first switch 72 and the second switch 74 allow for selective combustion of the combustible chemical composition of the first carrier tube 36 and the combustible chemical composition of the second carrier tube 40.
  • the sleeve 53 of the combustible chemical composition of the first carrier tube 36 (not shown in Figure 7) generally comprises a tube portion 76 which contains the combustible material and a sealing cap 78.
  • the tube portion 76 is combustible and may combust, or partially combust, with the combustible chemical composition to generate hydrochloric acid gas or hydrofluoric acid gas or a combination thereof.
  • the sleeve 55 of the combustible chemical composition of the second carrier tube 40 (not shown in Figure 6) generally comprises a tube portion 80 which contains the combustible material and a sealing cap 82.
  • the tube portion 80 is combustible and may combust, or partially combust, with the combustible chemical composition to generate hydrochloric acid gas or hydrofluoric acid gas or a combination thereof.
  • the device 10 disclosed herein comprises a first carrier tube 36 and a second carrier tube 40, in other examples, the device may comprise a single carrier tube or any number of suitable carrier tubes.

Landscapes

  • 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)
  • Incineration Of Waste (AREA)

Abstract

L'invention concerne un dispositif permettant de traiter une formation de trou de fond d'un puits de forage comprenant une tête de perçage et un ensemble bloc d'étanchéité au niveau d'une extrémité proximale de celui-ci et un ensemble bouchon de conduite au niveau d'une extrémité distale de celui-ci. Un tube de support s'étend entre la tête de perçage et l'ensemble bouchon de conduite. Le tube de support contient une composition chimique combustible qui génère de l'acide chlorhydrique gazeux, de l'acide fluorhydrique gazeux ou une combinaison de ceux-ci lorsqu'elle est brûlée. Un fil de charge relie électriquement la tête de perçage et l'ensemble bloc d'étanchéité à la composition chimique combustible.
PCT/CA2019/050171 2018-02-09 2019-02-08 Dispositif de traitement d'un puits de forage de formation de fond de trou WO2019153093A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862628925P 2018-02-09 2018-02-09
US62/628,925 2018-02-09

Publications (1)

Publication Number Publication Date
WO2019153093A1 true WO2019153093A1 (fr) 2019-08-15

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ID=67548723

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2019/050171 WO2019153093A1 (fr) 2018-02-09 2019-02-08 Dispositif de traitement d'un puits de forage de formation de fond de trou

Country Status (1)

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WO (1) WO2019153093A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021007645A1 (fr) * 2019-07-12 2021-01-21 Lamrock Canada Incorporated Dispositif de traitement d'un puits de forage de formation de fond de trou

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491387A1 (fr) * 1980-10-03 1982-04-09 Jet Research Center Procede, dispositif et composition pyrotechnique pour le sectionnement de conduits, notamment dans un puits de forage
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
CA2716975A1 (fr) * 2010-09-17 2012-03-17 Lamrock Canada Incorporated Dispositif servant a traiter une zone de formation de fond de puits d'un puits de forage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491387A1 (fr) * 1980-10-03 1982-04-09 Jet Research Center Procede, dispositif et composition pyrotechnique pour le sectionnement de conduits, notamment dans un puits de forage
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
CA2716975A1 (fr) * 2010-09-17 2012-03-17 Lamrock Canada Incorporated Dispositif servant a traiter une zone de formation de fond de puits d'un puits de forage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021007645A1 (fr) * 2019-07-12 2021-01-21 Lamrock Canada Incorporated Dispositif de traitement d'un puits de forage de formation de fond de trou

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