Methods of preparation of a oil field drillingmudwater - loss control additive with waste PAN fiber hydrolyzed at high pressure had been studied and had tested its properties.
研究了用废腈纶经高压釜中水解制备油田钻井泥浆降失水剂的方法，并进行了性能试验。
2
The next step is to try to staunch the flow proper with drillingmud, a mixture of water and clay minerals.
下一步是设法很巧妙地用由水与黏土矿物质组成钻探泥浆堵住原油的涌出。
3
As part of that process they had to replace the dense drillingmud, which was used to keep the well under pressure while it was drilled, with sea-water.