Halliburton reduced the number of staff at its headquarters by 22 percent or about 1,000 people as persistently low oil prices continued to bite, killing business for oilfield services providers. "These actions are difficult but necessary as we adjust our business to customers' decreased activity," a spokeswoman for the company said as quoted by Reuters, amid the "unforeseeable, dramatic business downturn caused by the coronavirus and unprecedented commodity price decline." The new job cuts come on top of another 350,…