Patent ID: 8539807
Filing Date: 2013-09-24
Classification: B21J,B21K,E21B

Abstract:
1. A manufacturing process for forming upsets on ends of drill pipe for those types of drill pipe requiring re-heating between second and third upsetting stages, comprising: operating a first preheat coil to preheat a pipe end of the drill pipe to be upset in a first preheat coil; walking the drill pipe to a second, primary heating coil; bringing the pipe end to a forging temperature of 2350 ° F. max in the primary heating coil; picking up the drill pipe from the primary heating coil position via a gantry robot; transporting the drill pipe to a first position of a pipe upsetter device and inserting the pipe end into the first position of the pipe upsetter device; cycling the upsetter device on the end of the drill pipe a first time; transporting the pipe to a second position of the pipe upsetter device and inserting the pipe end into the second position of the pipe upsetter device; cycling the pipe upsetter device on the pipe end a second time; transferring the drill pipe to a reheat coil located between the pipe upsetter device and the primary heating coil; re-heating the drill pipe end to the forging temperature in the reheat coil; transporting the drill pipe to a third position of the upsetter device; cycling the pipe upsetter device a final time; and delivering the drill pipe for downstream operations.