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Inventor

Daniel George Purkis

Inventor
Aberdeen, GB

Overview

50→
Patents
2001–2021
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 50 as inventor

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

E21Bprimary
E21BEarth or rock drilling70%
F15BSystems acting by means of fluids in general10%
G01VGeophysics7%
H01HElectric switches4%
Y10TTechnical subjects covered by former us classification4%
B01DSeparation1%
G06KGraphical data reading1%
H01QAntennas, i.e. radio aerials1%
PatentTitleYear
10,890,053Screens202110,883,343Downhole screen assembly202110,808,508Telemetry operated tools for cementing a liner string202010,753,196Downhole communication202010,753,177Method and apparatus for actuating downhole tools202010,724,360Well isolation202010,724,333Choke202010,538,982Valve assembly with a filter chamber202010,519,747Pressure operated valve assembly201910,428,621Choke201910,294,775Downhole communication201910,287,852Method and apparatus for actuating downhole tools201910,262,168Antenna for use in a downhole tubular201910,214,994Downhole arrangement201910,132,138Downhole apparatus and method201810,107,071Systems, assemblies and processes for controlling tools in a well bore201810,087,725Telemetry operated tools for cementing a liner string201810,077,633Downhole apparatus and method201810,053,958Downhole apparatus and method201810,041,335Switching device for, and a method of switching, a downhole tool201810,018,015Downhole apparatus and method20189,945,211Leak-off assembly for gravel pack system20189,739,127'Method and system for operating a downhole tool, for fracturing a formation and/or for completing a wellbore'20179,631,458'Switching device for, and a method of switching, a downhole tool'20179,488,046'Apparatus and method for downhole communication'20169,416,643'Selective fracturing system'20169,359,890'Method of and apparatus for completing a well'20169,359,842'Downhole actuating apparatus'20169,194,197'Mechanical counter'20159,194,227'Systems, assemblies and processes for controlling tools in a wellbore'20159,115,573'Remote actuation of a downhole tool'20159,103,197'Switching device for, and a method of switching, a downhole tool'20159,085,954'Method of and apparatus for completing a well'20158,973,666'Running adapter'20158,950,503'Control system'20158,839,872'Tree plug'20148,833,469'Method of and apparatus for completing a well'20148,701,776'Downhole actuating apparatus'20148,490,691'Plug'20138,191,570'Bi-directional flapper valve'20127,975,767'Apparatus for controlling a downhole device'20117,798,208'Wellhead assembly and method'20107,145,471'Sequential hydraulic control system for use in a subterranean well'20067,013,980'Hydraulically actuated control system for use in a subterranean well'20066,595,292'Method and apparatus for use with two or more hydraulic conduits deployed downhole'20036,585,051'Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods'20036,575,237'Hydraulic well control system'20036,567,013'Digital hydraulic well control system'20036,273,189'Downhole tractor'20016,179,052'Digital-hydraulic well control system'2001

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2001–2003Patents assigned to HALLIBURTON ENERGY SERV INC (4)· patent assignee history
2001–2019Based in Aberdeen, GB· patent location history
2001–2020Based in Cruden Bay, GB· patent location history
2003–2020Based in Aberdeenshire, GB· patent location history
2010–2020Patents assigned to PETROWELL LTD (22)· patent assignee history
2012–2016Patents assigned to PURKIS DANIEL (9)· patent assignee history
2014–2020Based in Peterhead, GB· patent location history
2018–2020Patents assigned to WEATHERFORD TECH HOLDINGS LLC (18)· patent assignee history
2018–2021Based in Loughborough, GB· patent location history
2019–2021Patents assigned to WEATHERFORD UK LTD (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PETROWELL LTD222010–2020
WEATHERFORD TECH HOLDINGS LLC182018–2020
PURKIS DANIELself92012–2016
HALLIBURTON ENERGY SERV INC42001–2003
WEATHERFORD UK LTD42019–2021
Locations
LocationPatentsSpan
Aberdeen, GB162001–2019
Cruden Bay, GB122001–2020
Aberdeenshire, GB112003–2020
Peterhead, GB52014–2020
Loughborough, GB42018–2021