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. 26, 2022
Filed:
Feb. 10, 2020
Saudi Arabian Oil Company, Dhahran, SA;
Amjad Alshaarawi, Dhahran, SA;
Haytham H. Alhamed, Al Khobar, SA;
Meshari M. Alshalan, Dhahran, SA;
Abdulwahab Al-Johar, Dhahran, SA;
Mohammad Saud Al-Badran, Dhahran, SA;
Saudi Arabian Oil Company, Dhahran, SA;
Abstract
A differential iron roughneck for making or breaking a pipe connection includes: at least one first gripping cylinder for delivering torque to a first pipe; at least one second gripping cylinder for delivering and receiving torque to and from a second pipe; and a differential gearbox including: a primary shaft delivering torque to the at least one first gripping cylinder; and a secondary shaft receiving torque from the at least one second gripping cylinder, where the primary shaft and the secondary shaft rotate at different speeds.