Inventor

Burchus Q. Barrington

Inventor

Duncan, OK, US

Overview

39→

Patents

1976–1994

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 39 as inventor

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

E21Bprimary

E21BEarth or rock drilling82%

F16KValves4%

Y10TTechnical subjects covered by former us classification4%

F16FSprings2%

F16LPipes2%

G01VGeophysics2%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%

PatentTitleYear

5,337,826'Tester valve'1994 5,297,629'Drill stem testing with tubing conveyed perforation'1994 5,228,516'Tester valve'1993 5,209,303'Compressible liquid mechanism for downhole tool'1993 5,138,313'Electrically insulative gap sub assembly for tubular goods'1992 5,133,419'Hydraulic shock absorber with nitrogen stabilizer'1992 5,083,623'Hydraulic shock absorber'1992 4,928,520'Plug release indicator'1990 4,801,160'High-pressure fluid flow connector'1989 4,673,890'Well bore measurement tool'1987 4,669,539'Lock for downhole apparatus'1987 4,646,829'Hydraulically set and released bridge plug'1987 4,624,317'Well tool with improved valve support structure'1986 4,582,140'Well tool with selective bypass functions'1986 4,579,174'Well tool with hydraulic time delay'1986 4,522,266'Downhole tester valve with resilient seals'1985 4,448,254'Tester valve with silicone liquid spring'1984 4,444,268'Tester valve with silicone liquid spring'1984 4,378,850'Hydraulic fluid supply apparatus and method for a downhole tool'1983 4,375,239'Acoustic subsea test tree and method'1983 4,374,583'Sleeve valve'1983 4,372,392'Full opening emergency relief and safety valve'1983 4,372,391'Screw operated emergency relief and safety valve'1983 4,347,900'Hydraulic connector apparatus and method'1982 4,319,633'Drill pipe tester and safety valve'1982 4,319,634'Drill pipe tester valve'1982 4,270,610'Annulus pressure operated closure valve with improved power mandrel'1981 4,116,272'Subsea test tree for oil wells'1978 4,113,018'Oil well testing safety valve'1978 4,109,724'Oil well testing valve with liquid spring'1978 4,083,409'Full flow bypass valve'1978 4,076,077'Weight and pressure operated well testing apparatus and its method of operation'1978 4,064,937'Annulus pressure operated closure valve with reverse circulation valve'1977 4,060,140'Method and apparatus for preventing debris build-up in underwater oil wells'1977 4,059,153'Weight and pressure operated well testing apparatus and its method of operation'1977 4,047,564'Weight and pressure operated well testing apparatus and its method of operation'1977 3,981,188'Method and apparatus for testing wells'1976 3,969,937'Method and apparatus for testing wells'1976 3,964,544'Pressure operated isolation valve for use in a well testing and treating apparatus, and its method of operation'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1994Patents assigned to HALLIBURTON CO (36)· patent assignee history

1976–1994Based in Duncan, OK, US· patent location history

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

1989Patents assigned to CADDELL MICHAEL J (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HALLIBURTON CO	36	1976–1994
HALLIBURTON SERVICES	2	1982
CADDELL MICHAEL J	1	1989

Locations

Location	Patents	Span
Duncan, OK, US	39	1976–1994