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Inventor

Robert M. Tessari

Inventor
Calgary, CA

Overview

15→
Patents
1995–2014
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 15 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

E21Bprimary
E21BEarth or rock drilling88%
Y10TTechnical subjects covered by former us classification12%
PatentTitleYear
8,881,835'Manipulator tool and tool catcher useful with wellbore reverse circulation'20148,443,906'Tools and methods useful with wellbore reverse circulation'20137,647,990'Method for drilling with a wellbore liner'20107,637,330'Casing bottom hole assembly retrieval process'20097,624,820'Method for drilling with casing'20097,475,742'Method for drilling with casing'20097,472,763'Wear resistant tubular connection'20097,219,727'Wear resistant tubular connection'20077,140,455'Valve method for drilling with casing using pressurized drilling fluid'20067,108,080'Method and apparatus for drilling a borehole with a borehole liner'20067,013,992'Borehole stabilization while drilling'20066,705,413'Drilling with casing'20046,585,052'Casing centralizer'20036,513,223'Method for installing a centralizer retaining collar and outer sleeve'20035,433,279'Portable top drive assembly'1995

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1995–2014Based in Calgary, CA· patent location history
2003–2010Patents assigned to TESCO CORP (12)· patent assignee history
2006Based in Houston, TX, US· patent location history
2013–2014Patents assigned to SCHLUMBERGER TECHNOLOGY CORP (2)· patent assignee history
2013Patents assigned to TATE BARRY J (1)· patent assignee history
2013Patents assigned to TESSARI ROBERT M (1)· patent assignee history
2013Patents assigned to WARREN TOMMY M (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TESCO CORP122003–2010
SCHLUMBERGER TECHNOLOGY CORP22013–2014
TATE BARRY J12013
TESSARI ROBERT Mself12013
WARREN TOMMY M12013
Locations
LocationPatentsSpan
Calgary, CA141995–2014
Houston, Texas, US12006