$国民油井华高(NOV)$ BRIEF-National Oilwell Varco Announces Sale Of Two 20,000 Psi BOP Stacks To Transocean 2019-06-07 07:22 路透社 -0.53%20.660华高 (NOV.US) June 6 (Reuters) - National Oilwell Varco Inc : * NATIONAL OILWELL VARCO ANNOUNCES SALE OF TWO 20,000 PSI BOP STACKS TO TRANSOCEAN * ANNOUNCES SALE OF TWO 20,000-PSI (20K) BLOWOUT PREVENTER (BOP) STACKS TO TRANSOCEAN * INITIAL DEPLOYMENT IS EXPECTED IN 2021 ON A 20K WELL IN GULF OF MEXICO