US Patent Issued to Interwell Norway AS on Sept. 16 for "Well tool device for injecting a fluid through a hole in a well bore" (Norwegian Inventors)

ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,416,217, issued on Sept. 16, was assigned to Interwell Norway AS (Hafrsfjord, Norway).

"Well tool device for injecting a fluid through a hole in a well bore" was invented by Espen Hiorth (Trondheim, Norway) and Arild F. Stein (Sandnes, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "A well tool device, which is for injecting an injection fluid through a hole in a well bore, includes a mandrel, an expandable sleeve provided circumferentially outside of the mandrel, a first and second expander, an injection fluid system, and a control fluid system. The first expander is for moving a first side of the expandable sleeve between a radially retracted s...