The Claw Tool is
located between the Pack off Bushing and the Cup Tool/Swab Cups. It is used for
equalizing the pressure in- and outside the inner string/stinger and for
hydraulic operations (e.g. hydraulic setting of the Liner Hanger or releasing
of the Setting Tool). During the
Run-In-Hole- and hydraulic operations the Claw Tool is in an open position.
When closing the Claw Tool it is necessary to pull the inner string and thus
the Claw Tool until the Pack off Bushing is able to apply mechanical forces on
the sleeve of the Claw Tool. Based on this force the sleeve moves down until
the Claw Tool is closed. To ensure that the Claw Tool remains closed a special
slip system is included in the sleeve.