Inventor

Lee W. Stepp

Inventor

Comanche, OK, US

Overview

1983–2007

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 drilling88%

F16JPistons4%

F16KValves4%

Y10TTechnical subjects covered by former us classification4%

PatentTitleYear

7,234,517'System and method for sensing load on a downhole tool'2007 7,048,066'Downhole sealing tools and method of use'2006 6,966,386'Downhole sealing tools and method of use'2005 6,666,266'Screw-driven wellhead isolation tool'2003 6,491,116'Frac plug with caged ball'2002 6,481,497'High temperature high pressure retrievable packer with barrel slip'2002 6,394,180'Frac plug with caged ball'2002 6,378,606'High temperature high pressure retrievable packer with barrel slip'2002 6,318,460'Retrievable high pressure, high temperature packer apparatus with anti-extrusion system and method'2001 6,102,117'Retrievable high pressure, high temperature packer apparatus with anti-extrusion system'2000 5,400,855'Casing inflation packer'1995 5,394,941'Fracture oriented completion tool system'1995 5,381,862'Coiled tubing operated full opening completion tool system'1995 5,348,089'Method and apparatus for the multiple stage cementing of a casing string in a well'1994 5,314,015'Stage cementer and inflation packer apparatus'1994 5,109,925'Multiple stage inflation packer with secondary opening rupture disc'1992 4,712,619'Poppet valve'1987 4,683,955'Automatic fill-up floating apparatus'1987 4,664,188'Retrievable well packer'1987 4,606,408'Method and apparatus for gravel-packing a well'1986 4,583,593'Hydraulically activated liner setting device'1986 4,418,754'Method and apparatus for gravel packing a zone in a well'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–1995Patents assigned to HALLIBURTON CO (12)· patent assignee history

1983–2007Based in Comanche, OK, US· patent location history

1986Based in Commanche, OK, US· patent location history

2000–2007Patents assigned to HALLIBURTON ENERGY SERV INC (9)· patent assignee history

2002Patents assigned to HALLIBURTON ENERGY SERVICE S I (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HALLIBURTON CO	12	1983–1995
HALLIBURTON ENERGY SERV INC	9	2000–2007
HALLIBURTON ENERGY SERVICE S I	1	2002

Locations

Location	Patents	Span
Comanche, OK, US	20	1983–2007
Commanche, OK, US	2	1986