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Debris deflector for wear and scale prevention

IP.com Disclosure Number: IPCOM000247209D
Publication Date: 2016-Aug-16
Document File: 1 page(s) / 118K

Publishing Venue

The IP.com Prior Art Database

Abstract

The intent of the design is to prevent scale deposits and wear on the packer mandrel during a drill down operation. This will enable a better packer seal when set.

During a drilldown application, drilling mud, sand and debris are a common threat that can scratch and build scale on the taper of the packer mandrel, limiting proper sealing capabilities for the seal. As drilling continues for days, the mud and sand flowing around the tool body begins to deposit scale on the surface of the mandrel. During drilling, mud is circulated with a certain flow rate to bring back cuttings from a freshly drilled well. During this process, the aggressive rock particles, sand etc. tend to wear down smoother surfaces as they travel over them. To prevent this from happening, a turbulent flow-inducing profile feature can be employed. The idea behind the design is to keep heavier particles suspended in the fluid, towards the center of the annulus between the tool and the casing and to propel the heavier particles away from the tool, closer to the casing inner diameter. When fluid flows over the profile feature it breaks down the speed of the fluid and creates turbulence. This turbulence helps in flushing the surface that needs protection from scale deposits and at the same time propels heavier objects away from the surface requiring protection, preventing wear. The flow profile can be adapted to any tool with an OD that needs protection from scale and wear for a defined length.

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Debris deflector for wear and scale prevention

The intent of the design is to prevent scale deposits and wear on the packer mandrel during a drill down operation. This will enable a better packer seal when set.

During a drilldown application, drilling mud, sand and debris are a common threat that can scratch and build scale on the taper of the packer mandrel, limiting proper sealing capabilities for the seal. As drilling continues for days, the mud and sand flowing around the tool body begins to deposit scale on the surface of the mandrel. During drilling,

mud is circulated with a certain flow rate to bring back cuttings from a freshly drilled well. During this process, the aggressive rock particles, sand etc. tend to wear down smoother surfaces as they travel over them. To prevent this from happening, a turbulent flow-inducing profile feature can be employed. The idea behind the design is to keep heavier particles suspended in the fluid, towards the center of the annulus between the tool and the casing and to propel the heavier particles away from the tool, closer to the casing inner diameter. When fluid flows over the profile feature it breaks down the speed of the fluid and creates turbulence. This turbulence helps in flushing the surface that needs protection from scale deposits and at the same time propels heavier objects away from the surface requiring protection, preventing wear. The flow profile can be adapted to any tool with an OD that needs protection from scale a...