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. 30, 2018
Filed:
Nov. 13, 2014
Canrig Drilling Technology Ltd., Houston, TX (US);
Alex Kunec, Tomball, TX (US);
Nabors Drilling Technologies USA, Inc., Houston, TX (US);
Abstract
A thread compensation apparatus including a drive connection. The drive connection portion includes an outer portion coupled to a drive apparatus and a rotating inner portion with a drive interface configured to couple to a rotating shaft of the drive apparatus. The thread compensation apparatus also includes a sleeve being rotatable with the inner portion of the drive connection, the sleeve being rotatable relative to the outer portion of the drive connection. The thread compensation apparatus includes a lower shaft which engages the sleeve, such that the sleeve can impart rotation to the lower shaft. Additionally, the lower shaft also includes a lower connection interface, such as to couple to a tubular gripping apparatus. Further, the lower shaft is displaceable relative to the sleeve and an actuator coupled to the outer portion of the drive connection operates to displace the lower shaft with respect to the sleeve.