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. 28, 2016
Filed:
Apr. 26, 2011
Yvon Bernard, Roissy en France, FR;
Pierre-arnaud Foucher, Roissy en France, FR;
Francois Girardi, Roissy en France, FR;
Yvon Bernard, Roissy en France, FR;
Pierre-Arnaud Foucher, Roissy en France, FR;
Francois Girardi, Roissy en France, FR;
GEOSERVICES EQUIPMENTS, Roissy en France, FR;
Abstract
This stuffing box () defines a circulation passage () of a cable working line (), a packer (), and a back-pressure resistant valve (). The passage () extends between an upstream end () of the stuffing box (), intended to be connected to a well, and a downstream end (). The back-pressure resistant valve () is arranged in the passage () to prevent, in case of break of the line (), the back-pressure of a fluid from the upstream end () towards the downstream end (). The or each packer () is situated between the upstream end () of the stuffing box () and the back-pressure resistant valve (). No packer () is arranged between the back-pressure resistant valve () and the downstream end ().