Method and System and Program Storage Device For Storing Oilfield Related Data in a Computer Database and Displaying a Field Data Handbook on a Computer Display Screen
a technology of computer database and field data, applied in the field of wellbore services, can solve the problems of increasing the number of errors generated during the conversion, unable to provide all users with updated versions of hand-held handbooks, and many limitations
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case ii
[0181]If second Open Hole is selected in presence of only a casing. Such a case will be encountered if the user has started to construct the well bore without dropping a open hole. However, in this case, the open hole will snap on to the bottom of the previously existing casing or engulf this casing by being outside it[0182]Case I: When it snaps to the bottom, it assumes a diameter equal to previous casing drift diameter minus 0.125 inch. The bottom of this OH will be closed by a dashed line. Also the moment this OH gets snapped, the previous casing will “develop” shoes, indicating, you can no longer extend previous casing.[0183] When the selected open hole snaps on to the surface then, it assumes a diameter equal to at least previous outside casing diameter plus X, where X has to be computed by Equation (1). When this hole snaps in to the surface, engulfing the previous casing, then it closes the bottom by a dashed line, with its default depth being more than previous casing depth ...
case iii
[0185]Here the well bore needs to get intelligent. Where the newly selected casing can be snapped will now depend on the properties of this and the previous casing in the well bore. The following rules will apply:[0186]If the Tool Joint OD of the selected casing is less than the drift diameter of the previous casing, then following checks will apply[0187]i. Snapping inside previous casing from the surface: First, based on the OD of the selected casing, compute the value of X using Equation (1).[0188]Case I. If the sum of OD of the newly selected casing and value X corresponding to this new OD, is less than or equal to previous casing ID minus 0.25 inch, then such a casing can be snapped inside previous casing without a forewarning, starting from surface. As soon as the casing is attached, indicate the end of previous casing by drawing a shoe (no casing can now be attached to previous casing), retain the first / previous open hole but show it to be intersecting with newly dropped casin...
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