Patent · US Active

Drilling apparatus using a sealed self-adjusting deflection device for drilling directional wells

US11421480B2 · kind B2 · utility

3Cited by

31References

30Claims

0Family size

Assignee

Baker Hughes, a GE company, LLC · US

Inventors

Volker Peters · Celle, DE
Andreas Peter · Celle, DE
Christian Fulda · Sulingen, DE
Heiko Eggers · Bad Fallingbostel, DE
Harald Grimmer · Celle, DE

Key dates

Filing date	Sep 23, 2016
Grant date	Aug 23, 2022
Priority date	—
Expiry date	Sep 23, 2036

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/024
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An apparatus for drilling directional wellbores is disclosed that in one non-limiting embodiment includes a drive for rotating a drill bit, a deflection device that enables a lower section of a drilling assembly to tilt about a member of the deflection device within a selected plane when the drilling assembly is substantially rotationally stationary to allow drilling of a curved section of the wellbore when the drill bit is rotated by the drive and wherein the tilt is reduced when the drilling assembly is rotated to allow drilling of a straighter section of the wellbore, and at least one seal that isolates at least a surface of the member from outside environment. The at least one seal is lubricated by a sealed hydraulic unit

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.