Weatherford International plc has appointed Karl Blanchard as COO.He spent more than 30 years at Halliburton Co. and most recently was COO of Seventy Seven Energy. Weatherford CEO Mark McCollum, who is working to turn around the company, formerly was CFO at Halliburton. Blanchard is to oversee all region and product line operations; quality, health, safety, security and environment; sales; engineering, research and development; and supply chain. "Mr. Blanchard has a long track record of bringing teams together to deliver operational excellence, strong financial performance and disciplined growth," said McCollum. "I have witnessed the effectiveness of his leadership first-hand, and I am very much looking forward to working with him to create a more balanced and integrated organizational structure at Weatherford. By aligning several elements of our business under Mr. Blanchard's direction, we will establish greater collaboration, innovation and process discipline across our organization."