Drilling advances ///

Like many of its aging brethren, Norway’s nearly 34-year-old Valhall field refuses to allow access to remaining reserves without a fight. Managing to drill through the over-pressured shale overburden that overlays the depleted, compacted chalk production zones is but round one; the knockout blow comes with the repercussions of a limp cement job, which typically metastasizes into sustained annulus casing pressures and costly remediation throughout the well’s life.

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