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公开(公告)号：US20240191607A1
公开(公告)日：2024-06-13
申请号：US18077619
申请日：2022-12-08
IPC分类号： E21B43/26 , E21B43/267
CPC分类号： E21B43/2605 , E21B43/2607 , E21B43/267
摘要： A hydraulic fracturing operation is performed in a wellbore formed in a subterranean zone. A wellhead is installed at an entrance to the wellbore. Liquid CO2 is flowed through a pipeline located at a surface and fluidically coupled to the wellhead. The liquid CO2 is flowed into the wellbore through the wellhead to perform the hydraulic fracturing. The hydraulic fracturing operation including flowing of the liquid CO2 through the pipeline to the wellhead is stopped. A portion of the liquid CO2 is withdrawn from within the pipeline into a liquid CO2 storage container, which is a portable system designed to capture and store liquid CO2 and that is fluidically coupled to the pipeline at the surface.
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公开(公告)号：US12000227B1
公开(公告)日：2024-06-04
申请号：US18092831
申请日：2023-01-03
CPC分类号： E21B31/005 , E21B43/26
摘要： A stimulation tool for dislodging material from a perforation formed through a tubular disposed in a wellbore includes a main body formed at least in part from a material that is buoyant in a wellbore fluid, a ballast, a magnet, and a pressure pulse generator. The tool is configured to descend downhole by force of gravity when the ballast is attached and couple, by the magnet, to an interior surface of the tubular upon arrival at a downhole location proximate the perforation. When the tool is coupled by the magnet to the interior of the tubular, the tool transmits pressure pulses from the pressure pulse generator into the perforation, thereby dislodging material from the perforation. The tool de-couples from the interior surface and releases the ballast, thereby permitting the tool to ascend uphole, driven at least partially by a buoyant force exerted by the wellbore fluids.
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