November 7, 2011, originating in Canada, China seamless tubing and casing products made by oil-subsidy final ruling mid-term review: cooperative enterprises seamless tubing and casing products, petroleum subsidy rates table below; co-operative enterprises seamless casing was 3381 yuan of subsidies yuan / ton, oil pipe products uncooperative corporate subsidies was 4070 yuan RMB / ton.
June 9, 2011, originating in Canada, China seamless tubing and casing products midterm review of countervailing investigation.