These are typically a machine which in simple terms used to penetrate surface of earth curst / deep in ocean these are mainly onshore or offshore and mainly used for water wells drilling, Oil wells drillings, as well as Natural Gas; these rigs even becomes a massive structure which generally becomes Oil Platform and houses drilling Rig,  temporary storage and also facilities to house work force as well. These rigs are made of structural steel and piping systems, and they again get classified with its use onshore and offshore. Hence specialize in supplying these requirements offshore grade steel to general onshore grade steel  and its associated accessories like hammer unions, butterfly valves etc..