A device used to translate print media into computer language so that a document can be viewed and read later on.

A physical object that is an opening in a barrier and a removable physical object that can block the opening.

A physical object that is an opening in a barrier and a removable physical object that can block the opening.

A block and bleed valve that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design.

A block and bleed valve that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design.

A heat exchanger that consists of two co-axial pipes of different sizes, where one fluid passes though the  inner pipe and the other fluid passes through the space between the inner and the outer pipes.

A heat exchanger that consists of two co-axial pipes of different sizes, where one fluid passes though the  inner pipe and the other fluid passes through the space between the inner and the outer pipes.

A valve that is intended for subsurface control/check operation.

A valve that is intended for subsurface control/check operation.

A drain port is a collection port that can be installed in pressure sensing lines for transmitters, steam lines, etc. to be able to remove liquids from the system that otherwise would create problems for the instruments.

A drain port is a collection port that can be installed in pressure sensing lines for transmitters, steam lines, etc. to be able to remove liquids from the system that otherwise would create problems for the instruments.

A 'liquid outlet port' that allows liquid to leave a container under gravity

A 'liquid outlet port' that allows liquid to leave a container under gravity

A drier is a physical object that is intended to remove absorbed or adsorbed liquid or water vapour below saturation state.

A drier is a physical object that is intended to remove absorbed or adsorbed liquid or water vapour below saturation state.

Equipment intended to enable the drilling of holes. Typically in the earth for oil and/or gas production.

Equipment intended to enable the drilling of holes. Typically in the earth for oil and/or gas production.

An artefact which is intended to operate and supply power to an artefact (instrument) with an edged or pointed end for making holes in hard substances by revolving or by a succession of blows.

An artefact which is intended to operate and supply power to an artefact (instrument) with an edged or pointed end for making holes in hard substances by revolving or by a succession of blows.

A rigid metal conduit that provides the high-pressure pathway for drilling mud to travel approximately one-third of the way up the derrick, where it connects to a flexible high-pressure hose (kelly hose).

A physical object that provides rotational or reciprocating energy to driven equipment.

A physical object that provides rotational or reciprocating energy to driven equipment.

A power transformer of which the magnetic circuit and windings are not immersed in an insulating liquid.

A power transformer of which the magnetic circuit and windings are not immersed in an insulating liquid.

A physical channel that acts as a conduit for fluids, gases, pipes or cables to transfer from one point to another.