Method of removing cutters

Patent metadata

Field	Value
Publication number	US-9027643-B2
Application number	US-99733109-A
Country	US
Kind code	B2
Filing date	Jun 11, 2009
Priority date	Jun 11, 2008
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

A method for enhanced degradation of a cutting structure on a drill shoe is provided. The cutting structure may be degraded at an accelerated rate after achieving a desired objective. Degradation of the cutting structures on the drill shoe may facilitate the eventual drill out of the drill shoe. In one embodiment, a method of degrading the cutting structure includes operating the drill shoe using a reduced flow rate of drilling fluid. In another embodiment, a method of degrading the cutting structure includes operating the drill shoe at an increased rotary speed. In yet another embodiment, a method of degrading the cutting structure includes operating the drill shoe with an increased weight on bit. In yet another embodiment, a method of degrading the cutting structure includes any combination of one or more of the enhanced degradation methods described herein.

First claim

What is claimed is:

1. A method of degrading a cutting structure on a drilling member, comprising:
operating the drilling member until a desired objective is achieved, wherein during operation of the drilling member, the drilling member is operated at a first rotary speed;
upon reaching the desired objective, continue operating the drilling member at a second rotary speed that is faster than the first rotary speed, thereby accelerating degradation of the cutting structure;
mon…

Assignees

• Beattie Scott
• Twardowski Eric Michael
• Tan Ming Zo
• Weatherford Technology Holdings Llc

Inventors

• Beattie Scott
• Twardowski Eric Michael
• Tan Ming Zo

Classifications

• E21B17/14 Primary

  Fixed Constructions · mapped topic