US 12,366,127 B2
Electric tong with onboard hydraulic power unit
Frank Wern, Hannover (DE); Bjoern Thiemann, Burgwedel (DE); Thomas Kotschy, Burgdorf (DE); and Michael Wiedecke, Salzhemmendorf (DE)
Assigned to Weatherford Technology Holdings, LLC, Houston, TX (US)
Filed by Weatherford Technology Holdings, LLC, Houston, TX (US)
Filed on Sep. 28, 2020, as Appl. No. 17/034,958.
Application 17/034,958 is a continuation of application No. 15/675,404, filed on Aug. 11, 2017, granted, now 10,787,869.
Prior Publication US 2021/0010336 A1, Jan. 14, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 19/16 (2006.01)
CPC E21B 19/164 (2013.01) [E21B 19/163 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tong system comprising:
a power tong for rotating a first tubular;
a plurality of hydraulic power consumers including a backup tong for clamping a second tubular;
an onboard electric motor; and
a switchbox providing at least two configurations of the tong system:
in a first configuration, the onboard electric motor mechanically drives the power tong but does not supply hydraulic power to the plurality of hydraulic power consumers; and
in a second configuration, the onboard electric motor does not mechanically drive the power tong but does supply hydraulic power to at least one of the plurality of hydraulic power consumers.