1.Take 1 gm of PAC sample. 2.Add 10 ml of 1 Normality HCL acid and hand stir for 10 minutes. 3.Add 20 ml of Distilled water. 4.Add 1 drop of phenolphthalein indicator.
Since some mud additives have acidic pH and the pH of some mud systems will change, some substances need to be added to increase the pH of the mud system. Many mud additives are acidic.
The reasons for controlling mud loss are: 1. Maintain wellbore integrity: in order to protect water-sensitive shale and reduce wellbore erosion to better implement casing cementing work.
In China, there are 12 large-scale manufacturers specializing in the production of carboxymethyl cellulose, accounting for more than 80% of the total domestic production.
Drill holes in the stump. Drill a series of holes in the top of the stump with a large-bit drilling machine. Tree stumps will absorb chemicals through these holes, so the holes should be evenly distributed.
There are about 13 large-scale sodium carboxymethyl cellulose manufacturers in China, of which there are 6 in Shandong Province, accounting for 46% of domestic production, and the degree of production automation is also the most advanced in China.