In the oil and gas drilling process, shale drilling is an important technical means. However, shale drilling produces large quantities of cuttings and exposed shale, which can adversely affect the environment and drilling efficiency. To solve this problem, shale inhibitors are widely used in the drilling process. Among them, low-viscosity polyanionic cellulose (PAC-LV) is an efficient shale inhibitor, which will be introduced in detail in this article.
During drilling, the exposure of shale and the dispersion of drill cuttings can adversely affect the environment and also reduce drilling efficiency. To solve this problem, shale inhibitors are widely used in the drilling process. Among them, low viscosity polyanionic cellulose (PAC-LV) is a highly effective shale inhibitor.
PAC-LV is a polymer compound with good adhesion and encapsulation. During drilling, PAC-LV adheres to and encapsulates exposed shale and cuttings, forming a protective film. This protective film inhibits the dispersion of shale cuttings and limits fluid interaction with exposed shale.
Experimental results show that PAC-LV can significantly reduce the number and size of shale cuttings and improve drilling efficiency. At the same time, PAC-LV can also reduce the exposed surface area of shale and reduce environmental pollution.
In conclusion, low viscosity polyanionic cellulose (PAC-LV) is a highly effective shale inhibitor. During the drilling process, it can attach and encapsulate exposed shale and drill cuttings, inhibit the dispersion of shale cuttings, improve drilling efficiency, and reduce environmental pollution. Therefore, PAC-LV is a recommended shale inhibitor.
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