Abstract: An apparatus for connecting or disconnecting a threaded coupling between two riser joints, comprising: —a frame (11) provided with a space (12) for receiving the coupling; —a first drive wheel set (20) carried by the frame and comprising one or more drive wheels (21, 22) driven by a first drive motor (23) for rotating a main nut of the coupling; and —a second drive wheel set (40) carried by the frame and comprising one or more drive wheels (41, 42) driven by a second drive motor (43) for rotating a locking nut of the coupling. The drive wheels of the second drive wheel set are located on a level above the drive wheels of the first drive wheel set to allow them to engage with and rotate the locking nut when the drive wheels of the first drive wheel set are in engagement with the main nut.

Abstract: An apparatus for connecting or disconnecting a threaded coupling between two riser joints, comprising:—a frame (11) provided with a space (12) for receiving the coupling;—a first drive wheel set (20) carried by the frame and comprising one or more drive wheels (21, 22) driven by a first drive motor (23) for rotating a main nut of the coupling; and—a second drive wheel set (40) carried by the frame and comprising one or more drive wheels (41, 42) driven by a second drive motor (43) for rotating a locking nut of the coupling. The drive wheels of the second drive wheel set are located on a level above the drive wheels of the first drive wheel set to allow them to engage with and rotate the locking nut when the drive wheels of the first drive wheel set are in engagement with the main nut.

Abstract: An elevator for gripping and lifting a riser joint or several interconnected riser joints of a completion and work over riser. A body includes a through bore for receiving a production pipe of a riser joint. The through bore is accessible via a longitudinal opening in the body. The body includes at least one locking device including a hydraulic cylinder. A piston rod of the hydraulic cylinder is moveable to and fro between an unlocking position, in which the piston rod allows a production pipe of a riser joint to pass into or out of the through bore via the longitudinal opening, and a locking position, in which the piston rod prevents a production pipe received in the through bore from passing out of the through bore via the longitudinal opening.

Abstract: An elevator for gripping and lifting a riser joint or several interconnected riser joints of a completion and work over riser. A body includes a through bore for receiving a production pipe of a riser joint. The through bore is accessible via a longitudinal opening in the body. The body includes at least one locking device including a hydraulic cylinder. A piston rod of the hydraulic cylinder is moveable to and fro between an unlocking position, in which the piston rod allows a production pipe of a riser joint to pass into or out of the through bore via the longitudinal opening, and a locking position, in which the piston rod prevents a production pipe received in the through bore from passing out of the through bore via the longitudinal opening.