A well is a collection of (zero or more) holes drilled into the Earth for the purpose of either (1) finding or producing underground resources; or (2) providing services related to the production of underground resources.

The wellhead is assembled from, or incorporates facilities for, the upper casing and tubing hangers. This effectively provides the upper termination of the wellbore and provides a mounting position for the surface flow-control equipment or Christmas tree.

A power transformer of which the magnetic circuit and windings are immersed in oil.

a level quayside area to which a ship may be moored to load and unload.

a powerful machine with one or more drums on which to coil a rope, cable, or chain for hauling or hoisting.

A detecting element that can be the sensing element of an anemometer or wind gauge.

is a device that converts the kinetic energy of wind into electrical energy.

A device which is an opening especially in the wall of a building for admission of light and air that is usually closed by casements or sashes containing transparent material (as glass)

A windsock, or wind cone, is a conical textile tube that resembles a giant sock. Windsocks can be used as a basic guide to wind direction and speed.

A hoist utilizing a wire-rope for suspending load. Wire hoists are normally electrically powered, but also (hand) lever types exists.

is a well services facility intended to handle wire lines.

A sling for enclosing material to be hoisted by a tackle or crane made by wire.

A wireless access point (WAP) is a device that allows wired communication devices to connect to a wireless network using Wi-Fi, Bluetooth or related standards. The WAP usually connects to a router, and can relay data between the wireless devices (such as computers or printers) and wired devices on the network.

An analysing instrument intended to determine the wobble index of a gas.

A physical object that is an arched device intended to embrace two parts to hold or unite them in position, or to divide loads.