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Device for treating a bottom-hole formation wellbore

a wellbore and bottom-hole technology, applied in the direction of borehole/well accessories, fluid removal, insulation, etc., can solve the problems of decreasing the permeability of the bottom-hole formation and the decrease of hydrocarbon recovery

Pending Publication Date: 2022-08-18
LAMROCK CANADA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a device for treating a wellbore by using a combustible chemical composition that generates hydrochloric acid gas or hydrofluoric acid gas or a combination thereof when combusted. The device includes a firing head, seal block assembly, and bullnose assembly connected together through a carrier tube which contains the combustible chemical composition. The combustible chemical composition may comprise hexachloroethane and ammonium nitrate, or polyvinyl chloride and ammonium nitrate, among others. The combustible chemical composition may be disposed in a sleeve and may include solid puck shaped members and a combustion catalyst. The device can be used to improve wellbore treatment operations.

Problems solved by technology

It is known that a decrease in the permeability of a bottom-hole formation of a wellbore may result in a decrease in hydrocarbon recovery.
Alternatively, 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.

Method used

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  • Device for treating a bottom-hole formation wellbore
  • Device for treating a bottom-hole formation wellbore
  • Device for treating a bottom-hole formation wellbore

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019]

ComponentPercent by WeightHexachloroethane30% to 60%Ammonium nitrate40% to 70%

example 2

[0020]

ComponentPercent by WeightChlorinated polyvinyl chloride30% to 60%Ammonium nitrate40% to 70%

example 3

[0021]

ComponentPercent by WeightChlorinated polyvinyl chloride0% to 5%Hexachloroethane25% to 55%Ammonium nitrate40% to 70%

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PUM

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Abstract

A device for treating a bottom-hole formation of a wellbore 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. There is a charge wire electrically connecting the firing head and sealing block assembly to the combustible chemical composition.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a 371 of International Patent Application Number PCT / CA2019 / 050970, filed on Jul. 12, 2019, the disclosure of each of which is incorporated herein by reference and on each of which priority is hereby claimed.BACKGROUND OF THE INVENTIONField of the Invention[0002]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.Description of the Related Art[0003]It is known that 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. Alternatively, the decrease in the permeability of the bottom-hole formation may be the result of cl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B36/00E21B37/00
CPCE21B36/008E21B37/00E21B37/06E21B37/08E21B43/255
Inventor BRENNAN, JORDAN
Owner LAMROCK CANADA