Inventor
PURKIS DANIEL
GB20 patents
⚠️ This page may combine multiple inventors who share the name “PURKIS DANIEL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PURKIS DANIEL
9 patentsUS8833469B2Sep 16, 2014
Method of and apparatus for completing a well
PURKIS DANIEL59 citations97
US9488046B2Nov 8, 2016
Apparatus and method for downhole communication
PURKIS DANIEL14 citations83
US9103197B2Aug 11, 2015
Switching device for, and a method of switching, a downhole tool
PURKIS DANIEL7 citations83
US8490691B2Jul 23, 2013
Plug
PURKIS DANIEL7 citations83
US8191570B2Jun 5, 2012
Bi-directional flapper valve
PURKIS DANIEL8 citations83
US9115573B2Aug 25, 2015
Remote actuation of a downhole tool
PURKIS DANIEL19 citations82
US8839872B2Sep 23, 2014
Tree plug
PURKIS DANIEL4 citations72
US8973666B2Mar 10, 2015
Running adapter
PURKIS DANIEL0 citations51
US8950503B2Feb 10, 2015
Control system
PURKIS DANIEL1 citations51
WEATHERFORD TECH HOLDINGS LLC
5 patentsUS10428621B2Oct 1, 2019
Choke
WEATHERFORD TECH HOLDINGS LLC7 citations83
US10087725B2Oct 2, 2018
Telemetry operated tools for cementing a liner string
WEATHERFORD TECH HOLDINGS LLC7 citations80
US10724333B2Jul 28, 2020
Choke
WEATHERFORD TECH HOLDINGS LLC0 citations51
US10808508B2Oct 20, 2020
Telemetry operated tools for cementing a liner string
WEATHERFORD TECH HOLDINGS LLC0 citations48
US10262168B2Apr 16, 2019
Antenna for use in a downhole tubular
WEATHERFORD TECH HOLDINGS LLC0 citations40
PETROWELL LTD
4 patentsUS7798208B2Sep 21, 2010
Wellhead assembly and method
PETROWELL LTD14 citations83
US9359890B2Jun 7, 2016
Method of and apparatus for completing a well
PETROWELL LTD2 citations62
US9085954B2Jul 21, 2015
Method of and apparatus for completing a well
PETROWELL LTD1 citations62
US7975767B2Jul 12, 2011
Apparatus for controlling a downhole device
PETROWELL LTD1 citations51