Large diameter pipes are at least 10 inches or greater so will invariably be welded rather than seamless due to its larger size. The pipe can be produced by longitudinal or spiral welding for applications that often include gas and oil transport.

A barge that is specially equipped to lay submarine pipelines.

The cost of producing oil from a well or lease.

A casing string that does not extend to the top of the wellbore, but instead is anchored or suspended from inside the bottom of the previous casing string.

This is a natural gas (predominantly methane, CH4) that has been converted to liquid form for ease of storage or transport. Liquefied natural gas takes up about 1/600th the volume of natural gas in the gaseous state. It is odourless, colourless, non-toxic and non-corrosive.

Light hydrocarbon material, gaseous at atmospheric temperature and pressure, held in the liquid state by pressure to facilitate storage, transport and handling. Commercial liquefied gas consists essentially of either propane or butane, or mixtures thereof.

This describes the process of gathering and recording information about the surface formation.