Profile: Dinesh Metal Industries specializes in providing seamless steel tubes and pipes. Drill pipe is a tube shaped conduit made of steel that is fitted with specially made threaded ends that are known as tool joints. Pipe for drilling provides for the drilling of a well bore and is available in a number of sizes. Drill pipes also provide strength and weight and are typically 30 ft to 33 ft long. Drill that is case hardened is helpful in supporting its own weight for a miscellany of lengths often surpassing a mile down the earth’s surface and are also expensive.