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US 9,540,898 B2Granted
Annular drilling device
AssigneeSunstone Technologies, LLC
InventorWilliam James Hughes
Life of this patent
Estimating the term…
Abstract
An annular drilling device is provided that employs an active or passive, stationary sealing element. The sealing element is made of a low-friction material that contacts the drill pipe and creates a seal.
Claims25
A pressure control device, comprising:
- a housing having a first end and a second end, said first end having a first flange and said second end having a second flange, said housing having an opening therethrough;
- a sealing element positioned within said housing and interconnected to a block body that is associated with said first flange, said sealing element being a compliant member possessing a distal end with a conical outer profile, and an inner profile with a cylindrical portion, said inner profile also including an opening adapted to selectively engage a cylindrical member, wherein said cylindrical portion has a diameter that is less than an outer diameter of the cylindrical member;
- and
- wherein said sealing element remains stationary relative to an outermost surface of said housing and said sealing element is not capable of rotation when the cylindrical member is inserted and rotated within said housing.
1 more element
A pressure control device, comprising:
- a housing having a first end and a second end, said housing having an opening therethrough;
- a sealing element maintained within said housing, said sealing element having an opening therethrough that is adapted to selectively engage a cylindrical member;
- and
- wherein said sealing element remains static relative to an outmost surface of said housing and the sealing element is not capable of rotation when the cylindrical member is inserted and rotated within said housing;
- and
- wherein said sealing element possesses a distal end with a conical outer surface.
3 more elements
Dependencies are inferred from the claim text.