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:
Jan. 03, 2017
Filed:
Sep. 06, 2013
Applicant:
Hydril Usa Distribution Llc, Houston, TX (US);
Inventors:
Assignee:
Hydril USA Distribution LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/00 (2006.01); E21B 21/10 (2006.01); F04B 7/02 (2006.01); F04B 15/02 (2006.01); F04B 43/073 (2006.01); F04B 53/10 (2006.01);
U.S. Cl.
CPC ...
E21B 21/001 (2013.01); E21B 21/106 (2013.01); F04B 7/02 (2013.01); F04B 15/02 (2013.01); F04B 43/073 (2013.01); F04B 53/1022 (2013.01);
Abstract
Drilling mud is lifted subsea to a drilling vessel with a mud pump having an internal bladder. Applying pressurized water to one side of the bladder urges it against a quantity of the mud to impart a lifting force onto the mud. Mud flow to and from the pump is controlled by valves driven by actuators. The actuators include a piston in a cylinder, a stem that connects the piston to a valve member, and ports for supplying fluid to opposing ends of the piston for selectively reciprocating the piston. Cavities are strategically location in the cylinder for absorbing vibrational forces generated when the piston reaches an end of its stroke.