Watt, a unit of power. It is a measure of the rate of energy conversion or generation, equivalent to one joule per second.

This is an enhanced oil recovery process where water and gas injection are both carried out alternately for periods of time to reduce gas channeling from injector to producer.

A watt (W) is a unit of power, and power is the rate at which energy is produced or consumed.

This is made from hot rolled or cold reduced strip, sheet or plate. Small and medium diameters are produced in continuous, multiple-roll mills that progressively bend incoming, unheated strip into a circular cross-section prior to welding along the longitudinal seam. Tube may subsequently be cold-drawn through dies to achieve precise dimensions and finish. This is cheaper than the seamless process but welded tube generally has a lower mechanical and pressure performance.

This method of joining metals is essential for certain types of pipemaking and is widely used in structural steel fabrication, shipbuilding etc. The workpieces are melted at the point where they are to be joined using a very localised, high temperature energy source, and a filler material is added to create a small additional amount of molten metal. When this cools the workpieces fuse together to form a strong joint.

A wellbore, drill hole or borehole is a hole drilled for the purpose of exploration or extraction of natural resources such as water, gas or oil where a well may be produced and a resource extracted for a protracted period. A wellbore is typically a straight shaft that "bores" into the ground to allow the recovery of natural resources.

Natural gas that contains less methane (typically less than 85% methane) and more ethane and other more complex hydrocarbons.

This describes oil that contains basic sediment and water.

This is a colloquial term for condensate, gas condensate, casinghead gasoline; liquid hydrocarbons produced with natural gas.

These heavy duty structural sections are often referred to as H-beams and I-beams (because of their cross-sectional appearance). They are mainly used in the frames of industrial and hi-rise structures, are internationally traded and are a stockholder item in standard lengths. Dimensions are in metric, except in the USA where they are sold as “W” shapes in inches.

Wind power is the use of wind to provide mechanical power through wind turbines to turn electric generators for electrical power. Wind power is a sustainable, renewable energy source that has a smaller impact on the environment compared to burning fossil fuels. Wind farms consist of many individual wind turbines, which are connected to the electric power transmission network.

WLTP (Worldwide Harmonised Light Vehicles Test Procedure) is a global harmoniaed standard for determining the levels of pollutants, CO2 emissions and fuel consumption of traditional and hybrid cars, as well as the range of fully electric vehicles.

This is a type of iron, which unlike hard, brittle pig iron – such as is tapped from a blast furnace – is tough and malleable, allowing it to be forged and welded. It has a high tensile strength and is more corrosion resistant than steel. Wrought iron has a very low carbon content – lower than many steels – but importantly it has traces of manganese/sulphur/phosphorus/silicon-containing slag which give it a fibrous structure and which contributes to its desirable properties. 

Metals which after melting, casting and solidifying have been further worked in a hot or cold condition to alter their shape and/or dimensions by rolling, forging, extruding and drawing.