Patent · US Active

Percussion drilling assembly having a floating feed tube

US8651202B2 · kind B2 · utility

1Cited by

7References

9Claims

0Family size

Assignee

SMITH INTERNATIONAL, INC. · US

Inventors

Shantanu N. Swadi · Cypress, US
Lance D. Underwood · Cypress, US
Jack Marshall · Glenolden, US
Charles H. Dewey · Houston, US
Kevin Edgar Harrington · Houston, US

Key dates

Filing date	Apr 20, 2011
Grant date	Feb 18, 2014
Priority date	—
Expiry date	Oct 26, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B10/5673
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A percussion drilling assembly for boring into the earth is disclosed. The percussion drilling assembly includes a top sub, a casing coupled to the top sub, and a feed tube assembly disposed within the top sub and the casing. The feed tube assembly includes a non-rigid coupling having a throughbore and a tubular body disposed therein. The tubular body is translatable in the radial position and/or rotatable relative to a longitudinal centerline extending through the non-rigid coupling.

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