Advantages of CMC-LV in onshore oil drilling:
Good filtration loss reduction effect: It can form a thin, hard, low-permeability filter cake on the well wall, effectively reduce the filtration loss of mud, reduce the penetration of drilling fluid into the formation, protect the well wall, and prevent the formation from being polluted and damaged.
Good rheological property adjustment: As a thickener and rheological control agent, it can increase the viscosity of the drilling fluid, improve its rheological properties, and make the drilling fluid have good suspension and cuttings carrying ability, which can effectively carry the cuttings to the ground and avoid the accumulation of cuttings at the bottom of the well.
Good stability: The drilling fluid with CMC-LV has high stability and can extend the shelf life of the drilling fluid. It also has a certain temperature resistance, can still maintain good performance at higher temperatures, reduce water loss, and meet the drilling needs of some high-temperature formations.
Good construction convenience: The product has good fluidity, is easy to use, and has antibacterial properties. It can inhibit the growth of mold in the mud, reduce the use of preservatives, and does not need to maintain a very high pH value to inhibit microbial growth.
Advantages of PAC-LV in onshore oil drilling:
Strong salt and calcium resistance: It has good salt and calcium resistance, and strong resistance to salt, calcium, and magnesium. Under complex geological conditions such as high salt and hard water, it can maintain the stability of the performance of the drilling fluid, effectively inhibit the dispersion and expansion of clay and shale, stabilize the well wall, and prevent the well wall from collapsing.
High slurrying rate: The slurrying volume can reach 2-3 times that of ordinary CMC. With less dosage, it can achieve better viscosity increase and filtration loss reduction effects, which can effectively reduce costs.
Efficient rheological adjustment: It can quickly and efficiently adjust the rheology of the drilling fluid. Under low dosage conditions, it can achieve rapid adjustment of the rheology of the drilling fluid, so that the drilling fluid has good fluidity and suspension, which is conducive to increasing the drilling speed.
Good compatibility with other substances: It has good compatibility with other polymers and can work synergistically with other additives in the drilling fluid to improve the performance of the drilling fluid. It also has good suspension power, can promptly and effectively remove drill cuttings and maintain a low solid content in the drilling fluid.
