US Patent Issued to Halliburton Energy Services on May 27 for "Guide sub for multilateral junction" (British, American Inventors)

ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,918, issued on May 27, was assigned to Halliburton Energy Services Inc. (Houston).

"Guide sub for multilateral junction" was invented by Mark Christopher Glaser (Houston), Angus Mackay Barron (Alford, Great Britain) and Michael Linley Fripp (Carrollton, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "In one or more examples, a method comprises advancing a tubing string along a primary wellbore toward a junction having a low-side exit to a secondary wellbore, with a guide sub positioned at a leading end of the tubing string. The guide sub has a buoyancy within a well fluid external to the guide sub. The buoyancy of the guide sub is used to bias ...