18 July 2017
A shallow cased hole close to the rotary table through the derrick floor in which a joint of drill string can be suspended to facilitate connecting […]
18 July 2017
The procedure of adding a length of drill pipe or tubing to the active string. The length to be added is placed in the mousehole, made […]
18 July 2017
The liquid circulated through the wellbore during rotary drilling and workover operations. In addition to its function of bringing cuttings to the surface, drilling mud cools […]
18 July 2017
Examination and testing of drilling mud to determine its physical and chemical properties.