APPARATUS FOR EXTRACTION OF OIL VIA UNDERGROUND DRILLING AND PRODUCTION LOCATION

摘要

A well pressure control assembly includes an annular pressure containment structure useful for manipulating pipe during drilling and other well operations performed with annular pressure at the wellhead. The annular pressure containment structure includes a sealing structure involving a sealing wall and a fluid port extending through the sealing wall through with a hydrodynamic bearing fluid is injectable adjacent pipe received in the annular pressure containment structure.