The Abu Dhabi Marine Operating Company (ADMA-OPCO) is a major producer of oil and gas from the offshore areas of the Emirate of Abu Dhabi. It is Operating on behalf of Shareholders ADNOC, BP and TOTAL & JODCO, having completed over 50 years of oil and gas production. ADMA OPCO is currently producing over 650 MBD from two main off shore fields, Umm Shaif and Zakum, through over 560 Offshore Well Conductors. Also, ADMA OPCO is expanding to produce 1000 MBD by 2020 once the new 3 fields (Umm Lulu, SARB & Nasr) are on line. The Magnitude of the well conductors will increase to over 600. Production assurance integrity review has dictated to ADMA OPCO to check all the assets integrity from the reservoir to the loading terminal. This has captured all the gaps and one of this was integrity assurance of the Well conductor. This had ADMA OPCO to review the inspection Methodology and assessment in order to have a comprehensive integrity assumption and a quantitative approach of recommendation.

Mechanical cleaning and Intelligent pigging (IP) are essential to reduce corrosion effect and identify the integrity status of pipelines and to know the weak point within the pipeline to avoid pipeline failure which might have serious environmental and business impact. Therefore, pipeline inspection is critical to ADMA OPCO to assure integrity compliance and determine the remaining life of the pipeline to plan for future replacement.The Intelligent Pigging is a method of pipeline internal inspection used to detect external and internal metal loss, cracks, geometry defects or video of the internal condition.Mechanical cleaning and can only be run on pipelines equipped with special facilities in order to launch and retrieve IP tools. IP always needs proper cleaning prior running of the IP tool using cleaning pigs (foam and Bi-Di with brushes). Pipelines without permanent pigging facilities can not IP until temporary facilities is installed (pig traps, pumping facilities, hoses, etc). Pipelines which are attached to other pipelines through Tie-in (Spur lines) are considered not piggable as the pigs can not be received and retrieved. The pipeline without pigging facilities requires longer shut down period than the pipelines fitted with permanent facilities.Cleaning and IP of pipelines with subsea Tie-in (Spur lines) at their end are not possible as the debris will stay in the pipeline attached and pigs will stay in the pipeline which will result in blocking the pipeline.The innovative approach was to take the pipeline offline and flood it with water and use Bi-Directional pigs (cleaning and specific IP tool) with direct co-ordination with the contractor. This approach solved and eased the inspection of the Spur lines on the oil and water systems, which has assured the integrity of the Spur lines for the operator.