Preparation and evaluation of nonionic polyurethane polymers in improving the rheological properties and filtrate loss control of water base muds

Anter, El-Sayed; Sayed, Galal H.; Abdou, Mahmoud I.; Abdel-Rahman, Nasser R.; Ahmed, Hany E.; Negm, Nabel A.

doi:10.21608/ejchem.2020.25588.2499

Preparation and evaluation of nonionic polyurethane polymers in improving the rheological properties and filtrate loss control of water base muds

Document Type : Original Article

Authors

¹ Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.

² Egyptian Petroleum Research Institute, Nasr city, Cairo, Egypt.

³ Egypt Nanotechnology Center, Cairo University, El Sheikh Zayed, Egypt.

10.21608/ejchem.2020.25588.2499

Abstract

Polyurethanes are special nonionic polymers which had a wide range of applications nowadays. This work aims to produce
different nonionic polyurethanes by the reaction of polyethylene glycols with different molecular weights (4000, 6000,
10.000, and 20.000 g/mole) and toluene diisocyanate. The obtained polyurethanes' structures were determined using
molecular weight measurements, Fourier transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance (1HNMR). The effect of the synthesized polyurethanes on the rheological properties of two drilling fluids was studied. The
polyurethane polymers were influenced by the filtrate loss of the drilling fluids in comparison to the blank. The results
showed that the synthesized polyurethane nonionic derivatives effectively enhanced the shear-thinning non-newtonian drilling
fluids following the modified power Law Model (Herschel Bulky Model). The other rheological properties of the formulated
drilling water-base muds, including apparent viscosity (AV), plastic viscosity (PV), yield point (YP), and gel strength were
improved considerably compared to the commercial formulation.

Keywords