Patent · US Expired

Forming a wellbore casing while simultaneously drilling a wellbore

US6725919B2 · kind B2 · utility

108Cited by
405References
28Claims
0Family size

Assignee

Inventors

Key dates

Filing dateSep 25, 2001
Grant dateApr 27, 2004
Priority date—
Expiry dateFeb 8, 2022

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE21B33/16
  • WIPO fieldCivil engineering
  • WIPO sectorOther fields

Abstract

A wellbore casing is formed simultaneously with the drilling out of the wellbore.

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