The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2026
Filed:
Apr. 30, 2025
Schlumberger Technology Corporation, Sugar Land, TX (US);
Milan Subotic, Katy, TX (US);
Jeffrey Ham, Katy, TX (US);
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A rotating control device (RCD) includes: a drive guide element surrounding a tubular and co-rotating with the tubular; a bearing housing comprising a bearing assembly for rotatably supporting the drive guide element; a rotary seal housing comprising rotary seals surrounding the drive guide element and limiting ingress of a working fluid flowing around the tubular into the bearing housing, the rotary seals arranged in the axial direction; fluid lines communicating with radial passages containing a pressure compensating fluid for controlling a pressure differential across the rotary seals; and a variable pressure compensating device positioned in at least one fluid line, wherein the variable pressure compensating device operates to build pressure of the pressure compensating fluid in at least one of the radial passages communicating with the at least one of the fluid lines when a leak across at least one of the rotary seals occurs.