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. 10, 2003
Filed:
Aug. 31, 2001
Applicant:
Inventor:
John M. Yokley, Kingwood, TX (US);
Assignee:
Dril-Quip, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 2/303 ;
U.S. Cl.
CPC ...
E21B 2/303 ;
Abstract
There is disclosed a ball and plug dropping head which includes a housing having an inlet at its upper end and an outlet at its lower end, and passages extending downwardly within the housing at circumferentially spaced locations, each to receive a ball or plug. A lateral opening connects the inlet with each passage beneath a removable plug closing the upper end of each passage, and valves are mounted in the housing each to close the passage beneath the lateral opening and thus beneath a ball on plug in the passage.