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:
Apr. 17, 2001
Filed:
Jan. 26, 2000
John Edward Goode, Arlington, TX (US);
Randall Scott Graves, Ft. Worth, TX (US);
Timothy Scott Steffenhagen, Ft. Worth, TX (US);
Hydra Rig, Inc., Fort Worth, TX (US);
Abstract
A coiled tubing injector includes two chains mounted for continuous, opposing rotation and aligned to grip between the continuous tubing. Behind a portion of each chain is a straight skate that presses gripper elements on the chain against the tubing as it passes between the chains. The skate includes a beam. Rollers are mounted on carriers, and the carriers slide into slots formed on the beam. A resilient pad is placed between the carriers and the beam. The gripper elements roll over the rollers as they are being pressed against the continuous tubing. Dimensional variations in gripper elements, rollers, and the roller carriers that may otherwise cause grippers to be out of alignment are accommodated by compression of the pad. Furthermore, the last roller at each end of each skate is mounted for pivoting against a spring in order to deflect as gripper elements turn into, or out of, alignment with the skate.