US Patent Issued to PAO "TMK" on March 25 for "Thread connection for casings" (Russian Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,817, issued on March 25, was assigned to PAO "TMK" (Moscow).

"Thread connection for casings" was invented by Sergey Alexandrovich Rekin (Moscow), Maxim Evgenievich Tyuldin (Moscow), Pavel Nikolaevich Sidorenko (Taganrog, Russia) and Maxim Nikolaevich Kruchkov (Taganrog, Russia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A thread connection for casings used for construction of vertical, directional and horizontal wells. The connection includes male and female elements, whose ends, both externally and internally, are produced correspondingly with tapered trapezoidal threads, sealing, transition and shoulder end surfaces. Crests and roots of the th...