18 July 2017

Lost circulation

To encounter an interruption in the circulation of drilling fluid due to the fact that the fluid is entering into a porous or fractured formation underground […]
18 July 2017

Make a connection

To attach a joint of drill pipe onto the drill stem suspended in the wellbore to permit deepening the wellbore by the length of the joint […]
18 July 2017

Make a trip

To hoist the drill stem out of the wellbore to perform one of a number of operations such as changing bits or taking a core and […]
18 July 2017

Make hole

To deepen the hole made by the bit (i.e., to drill ahead).
18 July 2017

Make up

1) to assemble and join parts to form a complete unit (e.g., to make up a string of casing). 2) to screw together two threaded pieces. […]
18 July 2017

Mix mud

To prepare drilling fluids from a mixture of water or other liquids and any one or more of the various dry mud making materials (such as […]
18 July 2017

Mud-off

In drilling, to seal the hole off from the formation water or oil by using mud. This applies especially to the undesirable blocking off of the […]
18 July 2017

Nipple up

In drilling, to assemble the blowout preventer stack on the wellhead at the surface.
18 July 2017

Perforate

To pierce the casing wall and cement of a wellbore to provide holes through which formation fluids may enter or to provide holes in the casing […]
18 July 2017

Plug back

To seal off the bottom section of a wellbore to prevent the inflow of fluid from that portion of the hole.