Rotary Table is one of the important supporting equipments in oil drilling operations and is an important part of rotating and carrying drill strings.Its main fuctions are: 1.When normal drilling,it drive the drill tools to rotate; 2.When trip and casing running, it supports the weight of all drill string or casing string in the well; 3.When breakout, unloading the drill bit and handing the accident, complete the auxiliary work such as back-off and makeup; 4.When drilling with a bottom hole power drilling tool, it used to brake the upper drill string.
