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:
Mar. 27, 2001
Filed:
May. 05, 1998
Pushkar Nath Jogi, Houston, TX (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A method for determining the existence of a whirling condition during drilling of a borehole provides real time determination of destructive conditions of a bottom hole assembly during drilling. The method measures the acceleration of the bottom hole assembly to determine one or more acceleration values. Sensors also measured with rotation speed of the bottom hole assembly to determine at least one rotation of speed value. Based upon this information calculations are performed to determine a radius or diameter of rotation in the time domain which will indicate and identify the whirling condition within the bottom hole assembly. Types of whirl conditions identifiable are forward and backward whirl with and without slip. The method assumes forward whirl and backward whirl and creates a plot for each then overlaps the plot which provides an accurate representation of the condition of the bottom hole assembly while drilling. The method further provides rapid determination of whether further calculation is necessary by allowing the operator to locate the drill call at any given time and only if it is touching then completely balance the calculation to determine the whirling condition existing.