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:
May. 28, 2013
Filed:
Sep. 23, 2010
Charles J. Miller, Bolton, CT (US);
Charles J. Miller, Bolton, CT (US);
Other;
Abstract
A well drilling system including: an annular valve; a well casing in fluid communication with the annular valve; a first check valve in fluid communication with the annular valve; a hydraulic cylinder including a first chamber having an inlet and an outlet, wherein the inlet of the first chamber is in fluid communication with an outlet of the first check valve; and a transfer unit including an inlet and an outlet, wherein the inlet of the transfer unit is in fluid communication with the outlet of the first chamber, the outlet of the transfer unit is in fluid communication with an inlet of a second check valve, and an outlet of the second check valve is in fluid communication with the annular valve.