DOWNHOLE WEIR FOR MEASURING FLOW-RATE IN RECIRCULATION WELLS

Recirculating wells are increasingly being used for ground water remed iation and aquifer characterization investigations. Determination of n ow rate is required for proper design and spacing of recirculation wel ls. The measurement of flow rate, however, can be difficult using stan dard equipment. To overcome some of the flow measurement problems asso ciated with more common measurement systems, a new device in the form of a downhole weir was developed for recirculating wells that use a tw o-casing design. The weir was designed to measure flow rates between 1 0 and 40 gpm. In this now range, the weir had an accuracy of +/- 2.8 g pm. This accuracy may be improved with some modifications.