John V. Leba

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Cypress, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Annular isolation device for managed pressure drilling
- Patent number 10,012,044
- Issue date Jul 3, 2018
- Weatherford Technology Holdings, LLC
- John Vinh Leba
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dog-type lockout and position indicator assembly
- Patent number 8,388,255
- Issue date Mar 5, 2013
- Vetco Gray Inc.
- Eric D. Larson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
ANNULAR ISOLATION DEVICE FOR MANAGED PRESSURE DRILLING
- Publication number 20160138352
- Publication date May 19, 2016
- WEATHERFORD TECHNOLOGY HOLDING, LLC
- John Vinh LEBA
- E21 - EARTH DRILLING MINING
Information Patent Application
DOG-TYPE LOCKOUT AND POSITION INDICATOR ASSEMBLY
- Publication number 20110008099
- Publication date Jan 13, 2011
- Vetco Gray Inc.
- Eric D. Larson
- E21 - EARTH DRILLING MINING