Gearhart Industries, Inc.

Exxon Production Research Company

Orien M Knight

Albert P Davis

John W Stoltz

Disclosed is a downhole logging and servicing system with manipulatable logging and servicing tools. The system includes a conveyor for running the tools into and out of the well bore and a manipulating apparatus operable responsive to fluid pressure to manipulate the tools. The manipulating apparatus includes a fluid operated incremental rotating device connected to the conveyor and control device operated by the rotating device to manipulate the tools.

Downhole logging and servicing system with manipulatable logging and

A side-entry sub for use in conjunction with wireline cable. The sub has a cable entry port provided with a self-closing valve for sealing the port upon withdrawal of the cable. In one embodiment, the self-closing valve is characterized by a housing member supporting a closure disc which is integrally molded with a resiliently deflectable support member having an elastic memory which biases the valve in the closed position. In an alternate embodiment, the self-closing valve comprises a ball valve, biased in the closed position by magnetic or spring means, and having a passageway through which the cable may pass. When the cable is inserted through the passageway, the ball valve is held in the valve open position. When the cable is removed from the passageway, the ball valve automatically closes.

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Joshua, TX, United States of America

Orien M Knight