As a privately-owned oilfield service company SIMMONS EDECO provides oilfield services to an international customer base of m ... ajor oil companies and large independent producers around the world. From our head offices in Calgary, Alberta, Canada we oversee operations in: Onshore drilling Workover and completion services Valve and wellhead services Industrial and oilfield equipment remanufacturing Cased-hole wireline Drilling and related equipment manufacturing Today SIMMONS EDECO is operational in Albania, Western Europe, UK, the Middle East, Mexico and employs more than 700 people world wide. read more