Abstract: A setting tool and liner hanger where the liner hanger has a threaded release section and elongated slip slots for receiving slips. The slips have inclined tongue and groove interconnections along the sides of the slots defining expander surfaces. The setting tool has a hydraulic actuator and a mechanical actuator respectively having dog members releasably connected to upper and lower internal grooves in the slip members. The hydraulic actuator operates in response to hydraulic pressure for moving connected dog member for setting the slips in a well casing.Upon release of the coupling nut on the setting tool from the liner hanger, the mechanical actuator is deactuated and both dog members are released from the slips so that the setting tool is releasable from the liner hanger.The mechanical actuator operates in response to relative rotation between the setting tool mandrel and liner hanger for moving connected dog members and the slips to a setting condition.

Abstract: A mechanical tubing drain connected in a tubing string in an oil well. The invention, which provides means for selectively opening and closing drain ports to drain fluid from a tubing string, comprises a ported mandrel slidably encased in a correspondingly ported sleeve. Seal means are provided about the mandrel port. Means are also provided to maintain proper longitudinal alignment between the mandrel and sleeve ports as well as guiding and restricting the movement of the sleeve about the mandrel. Spring loaded shoes attached to the sleeve engage the well casing to hold the sleeve immobile relative to the ported mandrel. In operation, the mandrel is rotated to selectively align the mandrel and sleeve ports to permit unloading of the tubing contents.