A pulling tool for use in a wellbore and/or tubing and a propulsion module of a pulling tool

摘要

The invention relates to a pulling tool for use in a wellbore or tubing for pulling cable. The pulling tool comprises a propulsion module (64) having a main section (1) and a propulsion arm (2) hinged to the main section (1). The propulsion arm includes a propulsion wheel (6, 37) with a gear system. An electric motor (8) drives the propulsion wheel (6, 37) via the gear system. The gear system may include a harmonic gear or a compound split ring epicyclic gear. The invention further comprises a propulsion module (64) of a pulling tool including such a gear system.