25 July 2017
The act of unwinding a cable from a drum. Also a device on a drilling rig that keeps the weight on the bit constant, and lowers […]
18 July 2017
To pump drilling fluid into the wellbore while the pipe is being withdrawn to ensure that the wellbore remains full of fluid even though the pipe […]
18 July 2017
The process of drowning out a well with water; also the process by which oil is driven through the sand into the well by water introduced […]
18 July 2017
When a well flows intermittently rather than continuously, it is said to be flowing by heads.