LINEAR ACTUATOR WITH EX-ZONE 1 RATED HOUSING

摘要

A linear actuator assembly that can include an electric motor contained in an explosive (EX) certifiable housing, a linear actuator external to the EX certifiable housing, the linear actuator coupled to and driven by the electric motor, the linear actuator having a first axis and a body, and a piston of the linear actuator that extends or retracts relative to the body when the linear actuator is driven by the electric motor, the piston having a second axis, with the first axis and the second axis being parallel and spaced apart. The electrically operated linear actuator assembly can provide up to 700 kN clamping force when engaging a tubular. A plurality of the linear actuator assemblies can provide up to 250 kNm of torsional force to a tubular string joint when used in a wrench assembly.