Abstract
Summary As the industry pursues optimum cost drilling techniques, more focus is being applied to multilateral (ML) technology. The presently available literature invariably focuses on the cost and efficiency benefits of drilling ML wells. What is missing in the media, however, are the benefits associated with publication of the negative aspects or costly failures of higher-technology, multiple-lateral projects that require a mechanical tieback, cement, or a pressure seal at the junction of the laterals (i.e., Class 3-, 4-, or 5-type wells, respectively). This paper presents a case study of a Class 4 ML well attempted by THUMS Long Beach Co. in the East Wilmington field of California.
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