18 July 2017

Nozzle

A small spout to direct the flow of fluid efficiently.
18 July 2017

Offline stand-building

A process that incorporates machines to facilitate the construction of stands of drillpipe away from the activities at well center. This may be done vertically using […]
18 July 2017

Offshore drilling

Drilling for oil in an ocean, gulf, or sea, usually on the Outer Continental Shelf. A drilling unit for offshore operations may be a mobile floating […]
18 July 2017

Oil sand

1) a sandstone that yields oil. 2) by extension, any reservoir that yields oil, whether or not it is sandstone.
18 July 2017

Oil string

The final string of casing set and cemented in the hole to prevent caving of the hole, the flow of fluid into the hole from other […]
18 July 2017

Oil zone

A formation or horizon of a well from which oil may be produced. The oil zone is usually immediately under the gas zone and on top […]
18 July 2017

Oilfield

The surface area overlying an oil reservoir or reservoirs. The term usually includes not only the surface area, but also the reservoir, the wells, and the […]
18 July 2017

Open

1) of a wellbore, having no casing. 2) of a hole, having no drill pipe or tubing suspended in it.
18 July 2017

Open hole

1) any wellbore in which casing has not been set. 2) open or cased hole in which no drill pipe or tubing is suspended. 3) the […]
18 July 2017

Operator

The person or company, either proprietor or lessee, actually operating an oilwell or lease, generally the oil company by which the drilling contractor is engaged. Compare […]
18 July 2017

Orifice

An opening of a measured diam that is used for measuring the flow of fluid through a pipe or for delivering a given amount of fluid […]
10 November 2021

Original Equipment Manufacturer (OEM)

The design owner or manufacturer of the traceable assemble equipment, single equipment unit, or component part, as well as for ensuring conformance to initial acceptance criteria […]