Guar and its derivatives are the most common biopolymer used in hydraulic fracturing fluid design. However, guar leaves residues behind in solution, it is not suitable at higher temperatures, and it is not immune to the market forces of demand and supply. This work is a step to sourcing alternative hydrocolloids for hydraulic fracturing fluid design. The rheological properties of Mucuna flagellipes, Cyamopsis tetragonoloba (guar), and polyanionic cellulose-regular PAC-R were done at 270C, 570C, and 850C. It was deduced that the flow behaviour index increases with temperatures and across the polymers with results ranging from 0.1699 for Mucuna flagellipes at 270C to 0.9453 for Cyamopsis tetragonoloba at 850C. However, the flow consistency index decreases with increasing temperature The flow consistency index, however, decreases with an increase in temperature for the three polymers and there is no clear trend within the polymer. Cyamopsis tetragonoloba exhibited the best rheology at higher shear rates while PAC-R exhibited the best rheology at higher temperatures and could be the best substitute for CT at higher temperatures. To analyse how the hydrocolloids handle proppants; the travel time of proppant in the fluid solution, the rheology of the fluid and the geometry of the proppant grains were used to compute the coefficient of drag, drag force and settling velocity of the polymer solutions. The PAC R gave the best drag force of 4.415 x 10-5N and Cyamopsis tetragonoloba gave the best settling velocity of 0.8mm/s

Keywords: rheology, galactomannan, mucuna flagellipes, cyamopsis tetragonoloba , polyanionic cellulose-regular, settling velocity