Complex sentence: Qserv is an oilfield service company based in Portlethen, Aberdeen, specialising in well services operations, including wireline, coiled tubing and pumping, though they also perform other engineering services, most notably pipeline services.
Split into simpler sentences: Qserv is an oilfield service company that specialises in oil-well services operations, including wireline, coiled tubing and pumping services. They also perform other engineering services, most notably pipeline services.