Inventor

Mark E. Hopmann

Inventor

Alvin, TX, US

Overview

1984–2004

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 22 as inventor

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

E21Bprimary

E21BEarth or rock drilling63%

Y10TTechnical subjects covered by former us classification20%

F16KValves17%

PatentTitleYear

6,698,517'Apparatus, methods, and applications for expanding tubulars in a wellbore'2004 6,612,547'Downhole flow control devices'2003 6,484,800'Downhole flow control devices'2002 6,450,255'Downhole flow control devices'2002 6,334,486'Downhole flow control devices'2002 6,260,616'Downhole flow control devices'2001 6,041,857'Motor drive actuator for downhole flow control devices'2000 5,906,238'Downhole flow control devices'1999 5,832,996'Electro hydraulic downhole control device'1998 5,316,084'Well tool with sealing means'1994 5,309,993'Chevron seal for a well tool'1994 5,188,183'Method and apparatus for controlling the flow of well bore fluids'1993 5,156,220'Well tool with sealing means'1992 4,949,791'Method and apparatus for securing and releasing continuous tubing in a subterranean well'1990 4,928,772'Method and apparatus for shifting a ported member using continuous tubing'1990 4,923,012'Safety valve for horizontal completions of subterranean wells'1990 4,917,191'Method and apparatus for selectively shifting a tool member'1990 4,909,325'Horizontal well turbulizer and method'1990 4,823,872'Downhole locking apparatus'1989 4,583,591'Downhole locking apparatus'1986 4,510,995'Downhole locking apparatus'1985 4,437,522'Selective lock for anchoring well tools'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984–1986Patents assigned to BAKER OIL TOOLS INC (3)· patent assignee history

1984–1986Based in Houston, TX, US· patent location history

1989–2003Patents assigned to BAKER HUGHES INC (18)· patent assignee history

1989–1990Based in Broken Arrow, OK, US· patent location history

1992–2004Based in Alvin, TX, US· patent location history

2004Patents assigned to WEATHERFORD LAMB (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BAKER HUGHES INC	18	1989–2003
BAKER OIL TOOLS INC	3	1984–1986
WEATHERFORD LAMB	1	2004

Locations

Location	Patents	Span
Alvin, Texas, US	13	1992–2004
Broken Arrow, OK, US	6	1989–1990
Houston, Texas, US	3	1984–1986