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- W1983714940 abstract "Abstract For a number of years the E&P industry has sought to prove the feasibility of monobore expandable liner extensions as an advantageous alternative to the telescoping nature of conventional casing designs (Figure 1). Collaboration between an operator and a supplier has produced a system that accomplishes this purpose for a 9 5/8 or 9 7/8 parent casing string to maintain 8 ½ drift post-expansion. Utilization of this well construction product can be planned as either a basis of casing design, or as a planned contingency. The objective and value of the monobore extension enables the operator to implement one more casing string, without reducing hole size. As a basis of design, this technology provides the option for the operator to begin well construction with one smaller casing size, which may drive down costs significantly, especially in high cost drilling and floater drilling programs. As a contingency, the product can isolate trouble zones such as reactive shales, sub-salt rubble zones, and low fracture gradient transitions without being forced to reduce casing size and subsequent drilled hole size. This capability can yield immeasurable benefits when retaining hole size means being able to either evaluate the reservoir as fully as desired, or to produce wells at rates deemed commercially necessary and optimum. The technology development collaboration produced a one-trip, top-down expansion system that was developed, tested and proved the technical feasibility of the expandable monobore liner extension concept. This paper details:> Key System Features and Benefits> System DevelopmentDownhole recess shoe qualificationCasing selection qualificationZonal Isolation RequirementsMonobore liner extension selection, one trip system> Field TrialPre-planningExpansion ProcessPost deployment results> Planned Contingency Applications> Casing BOD (Basis of Design) Applications> Summary Introduction In September 2006, BP and Baker Oil Tools achieved an industry milestone with the successful installation of the world's first true monobore expandable liner extension system, in a commercial well in BP's Arkoma asset in southeast Oklahoma, USA. Key system development milestones (Figure 2) and key challenge milestones (Figure 3) are illustrated chronologically along with the associated responses. The successful installation and expansion of the 8.0-in. (pre-expansion) linEXXTM solid expandable system below the 9 5/8-in. parent casing proved the application of solid expandable tubulars to enable operators to plan and drill deeper wells with larger hole sizes at the reservoir. Earlier in 2006, the successful installation of recess shoes in four North Sea wells set the stage for future additional monobore contingency applications of solid expandable tubulars to isolate trouble zones, including reactive shales, subsalt environments and low-fracture-gradients, and then drill ahead without having to reduce critical hole size." @default.
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- W1983714940 date "2007-09-04" @default.
- W1983714940 modified "2023-10-17" @default.
- W1983714940 title "Expandable Drilling Liner Technology: First Commercial Deployment of a Monobore Liner Extension" @default.
- W1983714940 doi "https://doi.org/10.2118/108331-ms" @default.
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