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  2. Steel casing pipe - Wikipedia

    en.wikipedia.org/wiki/Steel_casing_pipe

    Steel casing pipe is often specified as ASTM A-252 which is a structural grade material that does not require hydrostatic testing and the inspection requirements are not stringent and it usually costs less than other grades such as A-53, [2] A-139 or API 5L. Used natural gas line pipe is also used as casing on many projects because it is often ...

  3. Casing (borehole) - Wikipedia

    en.wikipedia.org/wiki/Casing_(borehole)

    Casing Diameters of a Borehole Casing Diagram premium gas tight connections on a casing string. Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.

  4. Spacer patterning - Wikipedia

    en.wikipedia.org/wiki/Spacer_patterning

    Spacers which define conducting features need to be cut to avoid forming loops. In the alternative spacer-is-dielectric (SID) approach, the spacers define dielectric spaces between conducting features, and so no longer need cuts. The mandrel definition becomes more strategic in the layout, and there is no longer a preference for 1D line-like ...

  5. Bottom hole assembly - Wikipedia

    en.wikipedia.org/wiki/Bottom_hole_assembly

    Rotary assemblies [2] are commonly used where formations are predictable and the rig economics are an issue. In such an assembly the weight of the drill collars gives the BHA the tendency to sag or flex to the low side of the hole, collar stiffness length and stabiliser diameter and placement are engineered as a means of controlling the flex of the BHA.

  6. Submarine hull - Wikipedia

    en.wikipedia.org/wiki/Submarine_hull

    The light hull (casing in British usage) of a submarine is the outer non-watertight hull which provides a hydrodynamically efficient shape. The pressure hull is the inner hull of a submarine that maintains structural integrity with the difference between outside and inside pressure at depth.

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  8. Oil well control - Wikipedia

    en.wikipedia.org/wiki/Oil_well_control

    As technology has advanced, more modern drillers have better control of the overall well. Oil well control is the management of the dangerous effects caused by the unexpected release of formation fluid, such as natural gas and/or crude oil, upon surface equipment of oil or gas drilling rigs and escaping into the atmosphere.

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