US Patent Issued to Halliburton Energy Services on April 8 for "Wiper dart having a bi-diameter wiper cup with protruding ring" (Singaporean, American Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,281, issued on April 8, was assigned to Halliburton Energy Services Inc. (Houston).

"Wiper dart having a bi-diameter wiper cup with protruding ring" was invented by Shobeir Pirayeh Gar (Houston), Lonnie Carl Helms (Houston), Gavin Graff (Houston) and Xiaoguang Allan Zhong (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wiper dart can be used in an oil and gas operation. The wiper dart can have at least two different outer diameters. A first outer diameter can be less than a second outer diameter and used to wipe the insides of tool joints of a tubing string. The second outer diameter can be used to wipe the insides of pipe sections of th...