 In December 2000, Calfrac acquired Dynafrac Well Services Ltd. and with it a two-pumper fracturing spread, a shallow coiled tubing unit, a high rate nitrogen pumper and four acid pumpers.By the spring of 2001, Calfrac had acquired and constructed seven fracturing spreads plus other well stimulation equipment.Early in 2002, CWS expanded to the U.S. Rocky Mountain region and started offering fracturing services through a field office in Platteville, Colorado.