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Eric R. EVANS
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Magnolia, TX, US
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Patents Grants
last 30 patents
Information
Patent Grant
Top-down cementing of liner assembly
Patent number
11,686,182
Issue date
Jun 27, 2023
Weatherford Technology Holdings, LLC
Zachary S. Trine
E21 - EARTH DRILLING MINING
Information
Patent Grant
Stage tool having composite seats
Patent number
11,306,562
Issue date
Apr 19, 2022
Weatherford Technology Holdings, LLC
Richard L. Giroux
E21 - EARTH DRILLING MINING
Information
Patent Grant
Active RFID tag arrangements for actuation of downhole equipment in...
Patent number
10,915,714
Issue date
Feb 9, 2021
Weatherford Technology Holdings, LLC
John Ownby
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Active RFID tag arrangements for actuation of downhole equipment in...
Patent number
10,586,083
Issue date
Mar 10, 2020
Weatherford Technology Holdings, LLC
John Ownby
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Mechanically operated reverse cementing crossover tool
Patent number
10,392,898
Issue date
Aug 27, 2019
Weatherford Technology Holdings, LLC
Richard L. Giroux
E21 - EARTH DRILLING MINING
Information
Patent Grant
Radio frequency identification tag delivery system
Patent number
10,198,606
Issue date
Feb 5, 2019
Weatherford Technology Holdings, LLC
John Fielding Ownby
E21 - EARTH DRILLING MINING
Information
Patent Grant
Radio frequency identification tag delivery system
Patent number
9,911,016
Issue date
Mar 6, 2018
Weatherford Technology Holdings, LLC
John Fielding Ownby
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Top-Down Cementing of Liner Assembly
Publication number
20230119630
Publication date
Apr 20, 2023
Weatherford Technology Holdings, LLC.
Zachary S. Trine
E21 - EARTH DRILLING MINING
Information
Patent Application
Active RFID Tag Arrangements for Actuation of Downhole Equipment in...
Publication number
20200134271
Publication date
Apr 30, 2020
Weatherford Technology Holdings, LLC.
John Ownby
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Active RFID Tag Arrangements for Actuation of Downhole Equipment in...
Publication number
20180225485
Publication date
Aug 9, 2018
Weatherford Technology Holdings, LLC.
John Ownby
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
RADIO FREQUENCY IDENTIFICATION TAG DELIVERY SYSTEM
Publication number
20180150660
Publication date
May 31, 2018
Weatherford Technology Holdings, LLC.
John Fielding OWNBY
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
MECHANICALLY OPERATED REVERSE CEMENTING CROSSOVER TOOL
Publication number
20170362915
Publication date
Dec 21, 2017
Weatherford Technology Holdings, LLC.
Richard L. GIROUX
E21 - EARTH DRILLING MINING
Information
Patent Application
RADIO FREQUENCY IDENTIFICATION TAG DELIVERY SYSTEM
Publication number
20160335464
Publication date
Nov 17, 2016
Weatherford Technology Holdings, LLC.
John Fielding OWNBY
G06 - COMPUTING CALCULATING COUNTING