1) a hole in the rig floor, 30 to 35 ft (9 to 11 m) deep, which is lined with casing that projects above the floor […]

The ratio of effective permeability to absolute permeability. The relative permeability of rock to a single fluid is 1.0 when only that fluid is present, and […]

1) [obsolete] a mud pit in which a supply of drilling fluid is stored. 2) a waste pit, usually an excavated earthen-walled pit. It may be […]

A subsurface, porous, permeable rock body in which oil and/or gas has accumulated. Most reservoir rocks are limestones, dolomites, sandstones, or a combination. The three basic […]

The average pressure within the reservoir at any given time. Determination of this value is best made by bottomhole pressure measurements with adequate shut-in time. If […]

The course of drilling fluid downward through the annulus and upward through the drill stem, in contrast to normal circulation in which the course is downward […]

The derrick or mast, drawworks, and attendant surface equipment of a drilling or workover unit.

The capacity to hold the hook-load and retard the continuous movement of the hook load within reasonable specified limits compatible with specific requirements.

The type of mast that can be folded for moving as contrasted with the standard derrick, which has to be completely dismantled and re-erected.

The riser adaptor is the component that provides the change in connection from API flange or hub connection to a proprietary OEM riser connection for connection […]

Riser analysis is a study of the variables within the riser system to determine capabilities and limitations of the string in use, taking into account metocean […]

Riser hang-off is the term employed when we suspend the stack or LMRP and riser from the rig. It may be hung-off because of weather or […]