Quatenary International Company Limited (incorporated in 2007) provides environmental and laboratory services, oilfield maintenance and pipeline/flowline works from offices in Port Harcourt and Warri, with its site listing the Elelenwo, Obio/Akpor address for Port Harcourt and independent registry profiles confirming a registered head-office address at Plot 576, 14th Street, DDPA Estate, Ugborikoko (Effurun/Warri) in Delta State; the company publishes a contact email and public mobile line used for client enquiries across the Niger Delta.