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. […]
25 July 2017

Makeup cathead

A device that is attached to the shaft of the drawworks and used as a power source for screwing together joints of pipe. It is usually […]
18 July 2017

Managed pressure drilling (MPD)

An adaptive drilling process used to precisely control the annular pressure profile throughout the wellbore. While conventional drilling uses the hydrostatic pressure of the drilling mud […]
18 July 2017

Marine drilling riser

A tubular conduit serving as an extension of the wellbore from the equipment on the wellhead at the seafloor to a floating drilling rig.
18 July 2017

Marsh funnel

A calibrated funnel commonly used in field tests to determine the viscosity of drilling mud.
18 July 2017

Mast

A portable derrick that is capable of being raised as a unit, as distinguished from a standard derrick, which cannot be raised to a working position […]
18 July 2017

Master bushing

A device that fits into the rotary table to accommodate the slips and drive the kelly bushing so that the rotating motion of the rotary table […]