Abstract: A protective device for a fluid-filled submersible electric motor powering a downhole pump in a well bore disposed between the motor and pump and forming a sealed assembly with the motor is described. The upper interior portion of the device is sealed to preclude the entry of well fluid and a vent near the lower end of its housing accommodates equalization of pressure between the interior of the device and the well bore with minimum contamination of the motor fluid. The protective device embodies a sealed chamber filled with motor fluid that communicates with the motor first by moving upward from a variable capacity chamber through an internal passageway and then downward through an annular passageway to the motor. An improved assembly for housing and orienting the operational parts of the device is also described.

Abstract: A compact, heavy duty trash compactor is provided for compacting trash in locations where space is limited. The compactor includes a C-shaped frame mounted on a skid. A cylindrical container is mounted on a tilt table attached to the skid such that the container is within the C-shaped frame. A telescoping ram is mounted on the frame to compact trash within the container. A foot guard is provided around the bottom of the container to prevent objects from being placed under the container when it is tilted forward.

Abstract: An open head power tong for use in making-up and breaking-out joints of varying diameter such as drill pipe joints which provides for bi-directional operation with the tong housing remaining in the same position.

Abstract: A tong and more particularly an open head tong of the type utilized to handle large diameter work pieces, such as drill pipe and casing for oil field applications, and including means to adjustably engage peripheral portions of such work pieces.