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:
Dec. 04, 2001
Filed:
Mar. 03, 2000
Christophe Rayssiguier, Houston, TX (US);
Schlumberger Technology Corp., Sugar Land, TX (US);
Abstract
A flow rate control device (,) placed at the bottom of an oil well in production comprises holes (,) formed in the production tubing (,), a closure sleeve (,) suitable for sliding over the holes (,) for controlling the flow rate, and a protective sleeve (,). The protective sleeve (,) is urged by a return spring (,) into a position in which it covers a sealing gasket (,). During closure of the device (,), the two sleeves come into edge-to-edge abutment and the closure sleeve (,) pushes the protective sleeve (,) back against the return spring (,). The sealing gasket (,) is never in direct contact with the fluid in the well. Preferably, the closure sleeve (,) is mounted on the outside of the production tubing (,).