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Inventor

Michael E. McMahan

Inventor
Duncan, OK, US

Overview

18→
Patents
1981–2012
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 18 as inventor

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

E21Bprimary
E21BEarth or rock drilling89%
A47DFurniture specially adapted for children5%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material5%
PatentTitleYear
8,225,878'Method and apparatus for expanded liner extension using downhole then uphole expansion'20128,215,409'Method and apparatus for expanded liner extension using uphole expansion'20127,360,592'Compliant cladding seal/hanger'20086,964,305'Cup seal expansion tool'20056,739,391'Surface deployed cement separation plug'20046,167,963'Removable non-metallic bridge plug or packer'20016,131,663'Method and apparatus for positioning and repositioning a plurality of service tools downhole without rotation'20005,806,113'Motion controlled cradle'19984,915,171'Above packer perforate test and sample tool and method of use'19904,804,044'Perforating gun firing tool and method of operation'19894,691,779'Hydrostatic referenced safety-circulating valve'19874,458,762'Recloseable auxiliary valve'19844,452,313'Circulation valve'19844,421,172'Drill pipe tester and safety valve'19834,420,045'Drill pipe tester and safety valve'19834,319,633'Drill pipe tester and safety valve'19824,319,634'Drill pipe tester valve'19824,295,361'Drill pipe tester with automatic fill-up'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1990Patents assigned to HALLIBURTON CO (7)· patent assignee history
1981–1990Based in Duncan, OK, US· patent location history
1982–1989Patents assigned to HALLIBURTON SERVICES (3)· patent assignee history
1998Based in Los Angeles, CA, US· patent location history
2000–2012Patents assigned to BAKER HUGHES INC (7)· patent assignee history
2000–2012Based in Humble, TX, US· patent location history
2012Patents assigned to ADAM MARK K (2)· patent assignee history
2012Patents assigned to JIRAL DENNIS G (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAKER HUGHES INC72000–2012
HALLIBURTON CO71981–1990
HALLIBURTON SERVICES31982–1989
ADAM MARK K22012
JIRAL DENNIS G22012
Locations
LocationPatentsSpan
Duncan, OK, US101981–1990
Humble, Texas, US72000–2012
Los Angeles, California, US11998