Inventor

Donald F. Hushbeck

Inventor

Duncan, OK, US

Overview

1982–2006

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 16 as inventor

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

E21Bprimary

E21BEarth or rock drilling89%

Y10TTechnical subjects covered by former us classification11%

PatentTitleYear

6,997,252'Hydraulic setting tool for packers'2006 6,220,349'Low pressure, high temperature composite bridge plug'2001 6,082,459'Drill string diverter apparatus and method'2000 5,701,959'Downhole tool apparatus and method of limiting packer element extrusion'1997 5,404,956'Hydraulic setting tool and method of use'1995 5,398,763'Wireline set baffle and method of setting thereof'1995 5,390,737'Downhole tool with sliding valve'1995 5,330,000'Squeeze packer latch'1994 5,271,468'Downhole tool apparatus with non-metallic components and methods of drilling thereof'1993 5,224,540'Downhole tool apparatus with non-metallic components and methods of drilling thereof'1993 5,074,361'Retrieving tool and method'1991 4,834,184'Drillable, testing, treat, squeeze packer'1989 4,651,829'Subsurface control valve'1987 4,445,571'Circulation valve'1984 4,324,293'Circulation valve'1982 4,311,197'Annulus pressure operated closure valve with improved reverse circulation valve'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982Patents assigned to HALLIBURTON SERVICES (2)· patent assignee history

1982–2001Based in Duncan, OK, US· patent location history

1984–1997Patents assigned to HALLIBURTON CO (11)· patent assignee history

2000–2006Patents assigned to HALLIBURTON ENERGY SERV INC (3)· patent assignee history

2006Based in Tulsa, OK, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HALLIBURTON CO	11	1984–1997
HALLIBURTON ENERGY SERV INC	3	2000–2006
HALLIBURTON SERVICES	2	1982

Locations

Location	Patents	Span
Duncan, OK, US	15	1982–2001
Tulsa, OK, US	1	2006