Abstract: A goose neck trailer includes a ball receiver and an adjacent hydraulic ram having a caster wheel on the lower end thereof. A trailer stand is provided to hold the goose neck off the ground when the trailer is parked. A truck is provided with guide rails directing the trailer caster wheel to a position to locate the ball receiver immediately above the trailer ball. The hydraulic ram is manipulated to transfer the load of the trailer between the ground and the truck at various times in coupling and uncoupling the truck and trailer.

Abstract: An apparatus for picking up and laying down pipe is arranged so that pipe movement is directed toward the hole axis or rotary table. When the pipe carrier stops movement toward the hole axis, the end of the pipe joint being delivered toward the hole is positioned above the rotary table and beyond an upstanding support carried by the rig which carries the load of the pipe joint and pipe carrier.

Abstract: There is disclosed an apparatus capable of simultaneous or sequential rotation and reciprocation of a casing string during the process of cementing the same in a well bore. There is provided a device for launching sealing elements such as spheres, go-devils or cementing plugs into the casing string. This device is mounted on a stationary part of a swivel and does not rotate during rotation of the casing string.