Patent · US Active

Methods of making multiple casing cuts

US7762330B2 · kind B2 · utility

26Cited by

6References

20Claims

0Family size

Assignee

SMITH INTERNATIONAL, INC. · US

Inventors

James E. Saylor, III · Conroe, US
Thomas D. Helbert · Magnolia, US
Marc Henderson · Diemelstraße, US
Joeseph V. Hebert · Tomball, US
Trygve Berthelsen · Sola, NO
Randall L. Hebert · Houma, US
Malcolm Perschke · Spring, US
A. J. Dach, III · Arlington, US
Harshad Ramdas Patil · Mumbai, IN
Praful C. Desai · Tecate Mission Road, US

Key dates

Filing date	Jul 9, 2008
Grant date	Jul 27, 2010
Priority date	—
Expiry date	Jul 25, 2028

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B31/16
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Methods of removing casing from a wellbore, the method including disposing a drilling tool assembly in a wellbore, the drilling tool assembly including a cutting device, a spearing device, and a jarring device. The methods further including activating the cutting device, cutting a first casing segment, deactivating the cutting device and activating a spearing device. The method further including engaging the spearing device with the first casing segment, activating the jarring device to free the first casing segment, and removing the first casing segment from the wellbore.

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