Shale Gas Drilling Development Technology

Derrick is the support structure for the equipment used to lower and raise the drill string into and out of the wellbore. 

Drill line is thick, stranded metal cable threaded through the two blocks (traveling and crown) to raise and lower the drill string. 

Goose-neck is a thick metal elbow connected to the swivel and standpipe that supports the weight of and provides a downward angle for the kelly hose to hang from. 

Swivel is the top end of the kelly that allows the rotation of the drill string without twisting the block. 

Kelly hose is a flexible, high-pressure hose that connects the standpipe to the kelly (or, more specifically, to the gooseneck on the swivel above the kelly) and allows free vertical movement of the kelly while facilitating the flow of drilling fluid through the system and down the drill string. 

---