Drilling mud low solids non-dispersed (LSND) is another type of water-based mud and is used to improve the cleaning ability and hole penetration. For example, if you can not get good performance of mud to the normal water or basic spud mud , you may want to try this mud. T he basic component of the LSND is composed of fresh water, gelling material (bentonite), caustic soda, soda ash, and flocculants.
To use this mud, you need to add more chemicals to prolong the clay formation performance thus total solids decrease. According to statistics from many places, it proves that the sludge improves the overall rate of penetration. What's more, using appropriate chemical solvents (polymer) will improve efficiency because the withdrawal solid polymer in the chemical industry will flocculate drill solids (cuttings).
Additionally, you will have indirect benefits by using this system of drilling fluid. For instant, You Will Reduce wear on surface equipment and pump share Because You Can Efficiently remove a lot of outrelid dren from The System . If you do not have much solid abrasive cutting through mud, you'll be able to prolong life bits. These two benefits will save you much time and money for the initiation and maintenance of surface facilities.MoreOver, using the LSND will also reduce the instability of shale, because the mud will not react with clay.
The disadvantage of the low solids non-dispersed drilling fluid is that it is very sensitive to chemical contamination. Cl-1, CO32-, HCO3-, and Ca 2 will change the ownership of the mud. What's more, you must also keep in mind that if you treat badly or add too much mud bentonite or barite, it causes the mud in bad condition.
I just want to give simple instructions on how to deal with chemical contaminants in the mud LSND.
Ca 2 + : Dealing with soda
Cl - : Apply by dilution with water
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