Takemodel of drill pipeframeas aexample, experimentalmodal based on ODS stestingmethod is studied and themodalparameter is distinguished and the testing results are analyzed.
According to research firm Spears and Associates, National Oilwell Varco of the U.S. dominates the global drillpipe market with a 47% share, while Hilong is second with 13%.
It was through his involvement in setting up the first drillpipe coating production line sourced from the U.S. that a business opportunity began to emerge.
Thad Allen, the government's point man in the region, said BP has determined there are three sections of drillpipe that need to be removed -- a main pipe and two shorter ones.