Stratigrafy Drilling in Deep Water With Aluminum Drill Pipes Application

This paper presents the experience gained with the use of special large diameter aluminum drillpipes (ADP) in the Atlantic Ocean, Norwegian Sea, Gulf of Mexico and Gibraltar Straight. The maximum water depth achieved was 1616 m. Both rotary and down hole motor drilling and coring techniques have been used for drilling and coring in variety of formations - from soil till hard rocks. Various types of retrievable tools are available to offer a spectrum of possibilities.