Min. Order Reference FOB Price
1 Piece US$100.00-1,000.00 / Piece
Product Description
Full Opening Safety valve (FOSv) is a ball type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well. TIANHE FOSv is a dual body full-opening safety valve, that does not interfere with the running of tools such as core barrels or survey ...