Patent · US Expired

Drill pipe protector

US6739415B2 · kind B2 · utility

16Cited by

37References

40Claims

0Family size

Assignee

Western Well Tool, Inc. · US

Inventors

Brian Mitchell · Starkville, US
Andrew Dale Fuller · Redondo Beach, US
Norman Bruce Moore · Aliso Viejo, US

Key dates

Filing date	Apr 4, 2003
Grant date	May 25, 2004
Priority date	—
Expiry date	Apr 4, 2023

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B41/0078
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A drill pipe protector having a tubular sleeve that is attached to a section of drill pipe and resides over the outer diameter of the drill pipe while moving within an associated well casing or well hole. The sleeve has low-friction end pads positioned on the ends of the sleeve to reduce friction between the ends of the sleeve and the end of an adjacent thrust bearing collar used to hold the sleeve in place on the drill pipe.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.