The world used for oil drilling mud filtrate reducer, can effectively control the mud water loss, generally drill a deep oil wells need to pre-gelatinized starch 4-5t, shallow wells in 1.5-2t.

World oil use as a drilling mud in humans, so that they can effectively control the mud water loss, the general drill a deep wells need to be pre-mixture, 4 - 5 T cornstarch, shallow wells to be 1.5 - 2 t.

The world serves as in the petroleum well drilling the mud to fall the dehydration medicinal preparation, can control the mud moisture content effectively the outflow, drills a deep oil well to need pregelatinization starch 4-5t generally, the shallow oil well needs 1.5-2t.

World as fluid loss additive of oil drilling mud, mud effectively control moisture loss, General drilling of deep wells required pre-gelatinized starch 4-5T, shallow wells to 1.5-2T.

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