ML technology was started in PDO since 1994 where over 240 ML have been drilled in PDO majority of them are level 2. The increasing complexity of well architecture demands more complex ML systems. Many system available in the market are not mature yet and the other do not meet the specific requirement of PDO. As it is known the main drives for this technology is a reduction in UTC by combining wells (One surface casing, one X-mass tree, and one completion) and reduce number of locations hence surface facilities as the pipe lines and headers. PDO activities with ML can be divided into three different applications. Northern fields where there is no hole instability or sand production problem therefore level 2 is of great success. As an example, in Saih Rawl wells the 6 to 8 producing laterals of level 2 from the same backbone is a routine construction. However, in the southern carbonate fields the hole instability and sand production problems exist. To avoid the sand production problem the lateral should be lined up by WWS or PDL, which required level 3 junction. The present of highly unstable shale at the cap rock add more complicity to the system by requiring a high strength junction for ML system. The third application of the ML technology is in deep stringer oil wells and gas wells where a level 6 system could be applied in the future where high pressure is required due to the reservoir high pressure. This article will brief in the experience we have with different ML systems of level 3 and how this drive us for the level 4 MX-select from Smith Red Baron which is initial design to meet our requirement in Amin field. Also this article will show how to go through sand production and shale ingress through the junction where a cemented junction is not appropriated (Flanged Hook Hanger) and the learning points from the first trial.

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