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:
Sep. 26, 1978
Filed:
Apr. 28, 1977
Applicant:
Inventor:
Michael R Garrett, Spring, TX (US);
Assignee:
FMC Corporation, San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 4 / ; 285 93 ; 340605 ;
Abstract
Packoff leaks in an unaccessible wellhead are monitored by a first pressure-sensitive detector positioned below the packoff seal. The space above the packoff seal is isolated from the inner bore of the casing, and fluid under pressure is applied above the seal to create a pressure differential across it. Any leakage through the seal is detected by a rise in pressure at the first detector. A second detector, coupled to the space above the seal, monitors the pressure above the seal.