JM Aftertreatment For Shell Drill Rigs

Posted on October 7, 2008

Based on the successful implementation of three selective catalytic reduction systems on drill rigs, Shell Exploration & Production Co. has chosen Johnson Matthey’s Stationary Source Emissions Control (SSEC) group to supply an additional 21 SCR systems on an additional seven drill rigs.

According to initial testing, Johnson Matthey’s advanced SCR system reduced NOx emissions by 90% and also maintained an average ammonia slip of 2 to 3 ppm. The state of Wyoming and the Bureau of Land Management (BLM) requested all natural gas companies in the Pinedale Anticline -- currently estimated to be one of the largest gas fields in the U.S.-- to reduce NOx emissions from their drilling rigs. The current emission reduction targets for the drilling rigs, each equipped with three Caterpillar 3512 diesel engines, are 90% NOx and 10 ppm ammonia slip.

Johnson Matthey will provide complete engineering, project management, installation and service support for the 21 new SCR systems, as they did for the first three systems. The modular design of the JM system – three of which are used on each rig – allows for easy transport and assembly on site, the company said.