An evaluation of bulk blending and sampling procedures was conducted using cement blends prepared at seven bulk plants located in four different regions of the United States. Blending variables investigated include batch size, number of transfers, and the effect of aeration. Three types of sampling devices were also evaluated: an automatic sampler, a specially modified ball valve sampler, and an improved diverted flow sampler. Three transfers of cement blends from one vessel to another were necessary to obtain a representative blend. Other variables evaluated had little effect on blend uniformity after three transfers. A modified ball valve sampler was safer to use than the ordinary valve type samplers, but the improved diverted flow sampler equipped with air actuators was convenient to use and provided consistent performance.

Keywords:
concentration, batch size, automatic sampler, sampler, spe 18525, upstream oil & gas, uniformity, flow sampler, retarder, evaluation
Subjects:
Casing and Cementing, Cement formulation (chemistry, properties)
Copyright 1988, Society of Petroleum Engineers
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