Patent ID: 7905281
Filing Date: 2011-03-15
Classification: E21B

Abstract:
1. A method implemented by a product that uses data from a caliper tool, the method for determining the size of pipe diameter to be inserted into an interval of a borehole, comprising the steps of: determining the position of the borehole wall in the interval based on data from a caliper tool; defining a filter window length that is less than the length of the interval and defining a series of filter windows along the interval; for each filter window, using the determined position of the borehole wall in that filter window to define a polygon, the edges of which are defined by the parts of the borehole wall closest to the borehole axis in that filter window; determining the maximum size of pipe diameter that will fit inside the polygon in each filter window without intersecting the edges; and determining the size of pipe to be inserted into the interval based on the maximum size of pipe diameter determined for each filter window.