Inventor
PURKIS DANIEL GEORGE
GB31 patents
⚠️ This page may combine multiple inventors who share the name “PURKIS DANIEL GEORGE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WEATHERFORD TECH HOLDINGS LLC
10 patentsUS10018015B2Jul 10, 2018
Downhole apparatus and method
WEATHERFORD TECH HOLDINGS LLC18 citations92
US10041335B2Aug 7, 2018
Switching device for, and a method of switching, a downhole tool
WEATHERFORD TECH HOLDINGS LLC2 citations73
US10053958B2Aug 21, 2018
Downhole apparatus and method
WEATHERFORD TECH HOLDINGS LLC3 citations71
US10287852B2May 14, 2019
Method and apparatus for actuating downhole tools
WEATHERFORD TECH HOLDINGS LLC3 citations69
US10077633B2Sep 18, 2018
Downhole apparatus and method
WEATHERFORD TECH HOLDINGS LLC1 citations60
US11156078B2Oct 26, 2021
Downhole communication
WEATHERFORD TECH HOLDINGS LLC1 citations59
US10753177B2Aug 25, 2020
Method and apparatus for actuating downhole tools
WEATHERFORD TECH HOLDINGS LLC1 citations59
US10132138B2Nov 20, 2018
Downhole apparatus and method
WEATHERFORD TECH HOLDINGS LLC0 citations50
US10753196B2Aug 25, 2020
Downhole communication
WEATHERFORD TECH HOLDINGS LLC0 citations49
US10294775B2May 21, 2019
Downhole communication
WEATHERFORD TECH HOLDINGS LLC0 citations49
PETROWELL LTD
8 patentsUS8701776B2Apr 22, 2014
Downhole actuating apparatus
PETROWELL LTD14 citations84
US9416643B2Aug 16, 2016
Selective fracturing system
PETROWELL LTD11 citations81
US9739127B2Aug 22, 2017
Method and system for operating a downhole tool, for fracturing a formation and/or for completing a wellbore
PETROWELL LTD3 citations73
US9194197B2Nov 24, 2015
Mechanical counter
PETROWELL LTD2 citations62
US9359842B2Jun 7, 2016
Downhole actuating apparatus
PETROWELL LTD0 citations52
US9631458B2Apr 25, 2017
Switching device for, and a method of switching, a downhole tool
PETROWELL LTD0 citations51
US10724360B2Jul 28, 2020
Well isolation
PETROWELL LTD0 citations41
US10214994B2Feb 26, 2019
Downhole arrangement
PETROWELL LTD0 citations41
WELL SENSE TECH LIMITED
8 patentsUS11168543B2Nov 9, 2021
Optical fibre deployment
WELL SENSE TECH LIMITED8 citations83
US11851964B2Dec 26, 2023
Fibre spooling apparatus
WELL SENSE TECH LIMITED2 citations72
US11761282B2Sep 19, 2023
Through-bore spool apparatus
WELL SENSE TECH LIMITED2 citations72
US11469823B2Oct 11, 2022
Optical communication system
WELL SENSE TECH LIMITED3 citations72
US11346172B2May 31, 2022
Through-bore spool apparatus
WELL SENSE TECH LIMITED4 citations72
US11161712B2Nov 2, 2021
Optical fibre spool
WELL SENSE TECH LIMITED2 citations72
US12487104B2Dec 2, 2025
Method, device and system for range finding
WELL SENSE TECH LIMITED0 citations62
US12009863B2Jun 11, 2024
Optical communication system
WELL SENSE TECH LIMITED0 citations62
WEATHERFORD UK LTD
5 patentsUS10519747B2Dec 31, 2019
Pressure operated valve assembly
WEATHERFORD UK LTD4 citations73
US11879312B2Jan 23, 2024
Screens
WEATHERFORD UK LTD0 citations60
US10890053B2Jan 12, 2021
Screens
WEATHERFORD UK LTD0 citations60
US10883343B2Jan 5, 2021
Downhole screen assembly
WEATHERFORD UK LTD0 citations60
US10538982B2Jan 21, 2020
Valve assembly with a filter chamber
WEATHERFORD UK LTD0 citations41