The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Nov. 27, 2013
Landmark Graphics Corporation, Houston, TX (US);
Robello Samuel, Cypress, TX (US);
Xiaoqian Huang, Katy, TX (US);
Landmark Graphics Corporation, Houston, TX (US);
Abstract
In one embodiment, the invention provides a computer implemented method for determining underbalanced drilling conditions. The method may include determining the number of tool joints in a segment of drill string, where each tool joint has a length and an inner diameter and an outer diameter, determining the total length of all tool joints in a segment of drill string, determining the total length of the segment of drill string excluding the tool length of all tool joints in the segment of drill string, wherein the drill string has an inner diameter and an outer diameter, determining the inner diameter of a segment of wellbore encompassing a segment of drill string, and determining a pressure drop in the segment of wellbore, based on the total length of all tool joints in the segment of drill string.