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:
Oct. 28, 1980
Filed:
Jun. 19, 1979
Rodney K Seto, Missouri City, TX (US);
Eugene L Brickman, Houston, TX (US);
Michael R Fitzgibbons, Houston, TX (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
This invention relates to methods and apparatus for monitoring fluid pressure in a subsea petroleum installation or other similarly inaccessible system while isolating the well fluid from the production control system. In one particular form of the invention, a body of secondary fluid is pressure-responsively coupled to but isolated from the oil or other primary fluid of interest by a piston, which subjects the secondary fluid to the pressure existing on the primary fluid. In addition, a measuring device is connected to the secondary fluid to derive an electrical signal representation of the pressure on the secondary fluid as a correlative indication of the wellhead or other pressure actually sought to be measured. Further, the isolating device is constructed and arranged to effectively seal off the primary fluid from escape into the environment or into the production control apparatus and the pressure of the primary fluid is maintained in the event of damage to any portion of the chamber enclosing and holding the secondary fluid. It is a particular feature of this invention to provide at least a minimum pressure on the secondary fluid of a magnitude such as to effectively limit the further compression of the secondary fluid by the piston, when the piston is initially subjected to the primary pressure.