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:
Jan. 11, 2022
Filed:
Nov. 11, 2019
Ronald Thorsten Eckmann, College Station, TX (US);
Ronald Thorsten Eckmann, College Station, TX (US);
Other;
Abstract
A method for removing a drill string from a wellbore, the drill string comprising a plurality of pipe segments, the wellbore and the drill string defining an annulus, the annulus and the drill string containing a fluid, comprises: a) determining a desired dry pipe length; b) calculating a hydrostatic pressure for a column of fluid having a height corresponding to the desired dry pipe length; c) injecting into the drill string a gas having a pressure at least as great as the pressure calculated in step b) so as to displace fluid from an upper portion of drill string, thereby creating a dry pipe portion, wherein the length of the dry pipe portion corresponds to the desired dry pipe length; d) preventing fluid from flowing from the annulus into the drill string; and e) removing at least a part of the dry pipe portion from the wellbore.