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:
May. 30, 2006
Filed:
Nov. 10, 2003
John Goode, Arlington, TX (US);
Ivan Iankov, Houston, TX (US);
Ronald Yater, Houston, TX (US);
Varco I/P, Inc., Houston, TX (US);
Abstract
A tubing injector () includes a traction device () having opposed grippers () laterally moveable so as to move a respective chain link member () of an endless loop chain into gripping engagement with the coiled tubing. A drive motor () is provided for powering the endless loop chain, and a plurality of roller bearings () each act between a respective chain link member and a gripper. A pressure compensating device () subjects fluid in a fluid passageway in the roller bearing () to a fluid pressure functionally related to subsea pressure. The tubing injector may be used for injecting the coiled tubing subsea into a wellhead or into another flowline.