Auto shaker control
18 July 2017Automatic relief valve
18 July 2017Automatic driller
A mechanism used to regulate the amount of weight on the bit without the continual control by drilling personnel. Automatic drillers free the driller from the sometimes tedious task of manipulating the drawworks brake to maintain correct weight on the bit. It may also have the capability to control weight within safe operating limits when more than one drilling param changes at a time.