Wellhead Frame

Usage: The frame is placed on top of the steel casing. The lifting lug hoists the conduit, opens the middle movable plate, lowers the conduit, and closes the movable plate. The collar on the conduit fits exactly into the central circle. The lifting lug is released, and the next conduit is hoisted by the lifting lug to the conduit fixed on the wellhead frame, and the conduits are connected with a wrench. This process is repeated to lower the entire conduit string into the hole.

Conduit insertion sequence: the bottom pipe is the first one, i.e., at the very bottom, followed by several 3-meter pipes, and finally connected with suitable short sections. Not all short sections need to be used; short sections are also called "adjusting pipes". After completing the conduit connection, proceed with pile concreting.