Method of determining when tool string parameters should be altered to avoid undesirable effects that would likely occur if the tool string were employed to drill a borehole and method of designing a tool string

US10053913B2 · kind B2 · utility

Assignee

• Baker Hughes, a GE company, LLC · US

Inventors

• Ingo Forstner · Ahnsbeck, DE
• Christian Linke · Celle, DE

Key dates

• Filing date: Sep 11, 2014
• Grant date: Aug 21, 2018
• Expiry date: Mar 11, 2037

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B44/00
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A method of determining when tool string parameters should be altered to avoid undesirable effects that would likely occur if the tool string were employed to drill a borehole includes, modeling portions or an entirety of the tool string in the borehole under steady state loading conditions, identifying deflections of the tool string with the modeling when buckling would occur for specific tool string parameters, and calculating whether whirl exhibiting similar deflections of the tool string to those identified during buckling would be undesirable.