US 11,111,748 B2 · Milling tools with a secondary attrition system

Abstract

Milling systems, tools, and methods include using a mill with secondary attrition system to re-mill cuttings and other debris away from the face of the mill. The secondary attrition system may be located uphole of the mill may be used to stage conditioning and re-sizing of debris. After debris is generated by the mill, the secondary attrition system may re-mill the debris to a finer size before allowing the debris to pass out of the sleeve. The debris may be re-milled by secondary cutting elements while within an annular gap positioned radially between the sleeve and a drive shaft for the mill. The annular gap may have a variable width as a result of a tapered outer surface of the drive shaft and/or a tapered inner surface of the sleeve. The variable width may cause debris to be re-milled into increasingly finer sizes.

Claims17

Dependent claims

A secondary attrition system for a milling system, comprising:

a sleeve having an inner surface and an outer surface;
a tubular component within the sleeve and rotationally connected to the sleeve, the tubular component having an outer surface cooperating with the inner surface of the sleeve to define a gap having a variable width along at least a portion of a length of the tubular component;
and
at least one cutting element coupled to the inner surface of the sleeve or the outer surface of the tubular component and the at least one cutting element located within the gap.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

16/747,510Filed 20 Jan 2020 · continuation

Priority

6 Aug 2014

Published

US 2020/0149364 A114 May 2020

Granted

7 Sep 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 29/002
Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming…
E21B 4/02
Drives for drilling, used in the borehole: fluid rotary type drives
E21B 10/42
Drill bits: rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
E21B 10/60
Drill bits: characterised by conduits or nozzles for drilling fluids

Family

Application62/034,031Us provisional application · filed 6 Aug 2014

Application62/034,052Us provisional application · filed 6 Aug 2014

Application62/153,841Us provisional application · filed 28 Apr 2015

Application14/815,174Parent of this continuation · filed 31 Jul 2015

US 2020/0149364 A1Pre-grant publication · published 14 May 2020

US 10,538,983 B2Parent of this continuation

US 2016/0040496 A1Published application

US 11,111,748 B2This patent

From the US filing history. Foreign family members aren’t listed.

Milling tools with a secondary attrition system

Life of this patent

Milling tools with a secondary attrition system

Life of this patent

Abstract

Claims17