The major components of the rap oil seedcakes are protein,nitrogen-free lixivium,coarse fiber,crude fats,and ash content. These components have good filtration reduction in drilling fluids.

• 菜籽油饼的主要成分为蛋白质、无氮浸出物、粗纤维、粗脂肪和粗灰分,这些成分在钻井液中都具有较好的降滤失效果。