One of the modifications recommended is to install a mudcooler. This is basically a heat exchanger with interconnections for serial or parallel operation, depending on required mud temperature difference.
Seawater is used as cooling medium. The obtained temperature difference is 70 deg F with a maximum flow rate of 250 tons per hour.Although it is difficult to get a good feeling for the many temperature and time parameters, which determine the downhole temperature, the effect of such a heat exchanger could be quite significant. Lowering the maximum downhole temperature could reduce chances on (logging) tool failures, make it possible to run better tools, help controlling mud properties, etc, and thereby save rig-time.