ENTP Drilling & WorkOver, a subsidiary of Sonatrach, is a prominent Algerian company specializing in oil drilling and work-over services. Established in 1968 and restructured in 1981, ENTP has nearly 50 years of experience in the hydrocarbon sector. The company has drilled over 2,700 oil wells and completed more than 4,300 work-over operations in Algeria, with additional international projects in Tanzania, Oman, and Libya.

ENTP's expertise includes various drilling techniques such as horizontal, short radius, and unbalanced drilling. The company operates a large logistics base and employs over 6,600 personnel, reflecting its significant scale. Its service offerings encompass drilling of hydrocarbon wells, maintenance and enhancement of existing wells, deepwater drilling, oilfield transportation, and support services. ENTP has also formed a joint venture with DEUTAG Germany to enhance its technological capabilities and engages in international cooperation, including a recent agreement with Libya�s National Oil Wells Drilling & Workover Company.