In-situ system for mixing two or more chemical components downhole in a wellbore and a method employing same
OwnerColton Garrett Hoffmaninventor
Life of this patent
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Abstract
An injection and downhole-mixing system and method mix two or more components downhole in a wellbore. The system delivers two or more components via fluidly separated delivery channels from the surface into a downhole injection point of the wellbore wherein they are mixed and injected into the wellbore to form a solidifying isolation mixture therein at or about the downhole injection point. After set, the isolation mixture forms a solid, impermeable barrier in the wellbore. The components for forming such barriers may be epoxies, polymers, resins, resin-based gypsum cements, and the like.
Claims20
A method for forming a solidified isolation material downhole at or about an isolation location in an open or cased wellbore, the solidified isolation material being formed from mixing of two or more chemical components, the method comprising:
- extending a retrievable delivery sub-system downhole to the isolation location the delivery sub-system comprising a tubing assembly having at least two fluidly separated delivery channels,
- delivering the two or more chemical components downhole to the isolation location through the delivery sub-system, each delivery channel delivering at least one of the two or more chemical components;
- mixing the two or more chemical components in a downhole injection tool to form a solidifying isolation mixture wherein the solidifying isolation mixture solidifies to the solidified isolation material after a period of time;
- injecting via a mixing tube the solidifying isolation mixture into the wellbore at or about the isolation location, the mixing tube being capable of being sheared off from the downhole injection tool under a pulling force;
- applying a pulling force to the downhole injection tool for shearing off the mixing tube;
- and
- removing the delivery sub-system and the downhole injection tool from the isolation location.
A system for forming a solidified isolation material downhole at or about an isolation location in an open or cased wellbore, the solidified isolation material being formed from mixing of two or more chemical components, the system comprising:
- a delivery sub-system retrievably extendable through the wellbore to the isolation location, the delivery sub-system comprising a tubing assembly having at least two fluidly separated delivery channels, each delivery channel for delivering at least one of the two or more chemical components from surface downhole to the isolation location;
- and
- a downhole injection tool coupled to a downhole end of the delivery sub-system for receiving the two or more chemical components therefrom and injecting the received two or more chemical components into the wellbore through a disposable mixing tube at or about the isolation location for forming the solidified isolation material thereabout;
- wherein the disposable mixing tube is capable of being sheared off from the downhole injection tool under a pulling force.
A system for forming a solidified isolation material downhole at or about an isolation location in an open or cased wellbore, the solidified isolation material being formed from mixing of two or more chemical components, the system comprising:
- a delivery sub-system retrievably extendable through the wellbore to the isolation location, the delivery sub-system comprising a tubing assembly having at least two fluidly separated delivery channels, each delivery channel for delivering at least one of the two or more chemical components from surface downhole to the isolation location;
- and
- a downhole injection tool coupled to a downhole end of the delivery sub-system for receiving the two or more chemical components therefrom and injecting the received two or more chemical components into the wellbore through a disposable mixing tube at or about the isolation location for forming the solidified isolation material thereabout;
- wherein the disposable mixing tube capable of being sheared off from the downhole injection tool under a predefined first pulling force;
- and
- wherein the downhole injection tool comprises a shear section breakable under a predefined second pulling force thereto for shearing off the downhole injection tool.
Dependencies are inferred from the claim text.