Alaska Patent of the Month – March 2021

Casing or tubing strings are long connections of pipes used in drilling applications. These are made from threaded tubular sections joined together with a couple to create a strong and sturdy string. When inserted in a borehole, the string has to remain centered to evenly distribute forces and make the operation safe. Centralizers are typically made of a cylinder that covers the string at intervals. Each component has raised blades that extend out. Various formats for the blades have been developed to try and minimize weight and increase efficiency. The blades provide a level of support around the string but can also block the path of fluid as the string is inserted into the borehole. This blocked path causes a pressure build up, so the insertion is slowed down to allow pressure to release as you go. Unique Machine, LLC has designed a new blade configuration that prevents excessive pressure build up. Their product reduces the time needed to insert the string into a borehole.

Their design involves a helical blade set up which reduces drag and friction forces. Their design allows fluids to flow past more readily which reduces the pressure build up. The leading edge of the blades are sharply angled and do not overlap each other. This gap between blades allows pressure releases and fluid flow. These modifications to the blade design and introduction of space between the blades increases efficiency and effectiveness of the string insertion.

About Unique Machine, LLC

Unique Machine is Alaska’s largest machine shop, serving the fishing, mining, construction, government, gas and oilfield industries for over 40 years and is an important supplier to all oilfield Original Equipment Manufacturer (OEM) companies statewide. They seek out innovative ways to include and introduce new products, machinery and methods to save energy and be more efficient. 

Are you redesigning existing technology ? Did you know your development work could be eligible for the R&D Tax Credit and you can receive up to 14% back on your expenses? Even if your development isn’t successful your work may still qualify for R&D credits (i.e. you don’t need to have a patent to qualify). To find out more, please contact a Swanson Reed R&D Specialist today or check out our free online eligibility test.

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Swanson Reed is one of the U.S.’ largest Specialist R&D tax advisory firms. We manage all facets of the R&D tax credit program, from claim preparation and audit compliance to claim disputes.

Swanson Reed regularly hosts free webinars and provides free IRS CE and CPE credits for CPAs. For more information please visit us at or contact your usual Swanson Reed representative.

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