Method for determining the size of tubular pipe to be inserted in a borehole
US7905281B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 2007 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | May 5, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for determining the size of tubular pipe to be inserted into an interval of cased or uncased borehole is disclosed. The position of the borehole wall or innermost casing surface in the interval is determined and a window length that is less than the length of the interval is defined. A series of windows along the interval is defined and for each window, the determined position of the borehole wall in that window is used to define a polygon, the edges of which are defined by the parts of the borehole wall closest to the borehole axis in that window. The maximum size of pipe diameter that will fit inside the polygon in each window without intersecting the edges is determined and the size of pipe to be inserted into the interval selected based on the maximum size of diameter pipe determined for each window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.