DU

David R. Underdown

Chevron: 9 patents #523 of 4,788Top 15%
AR Atlantic Richfield: 3 patents #189 of 1,061Top 20%
BT Baker Oil Tools: 3 patents #19 of 87Top 25%
Overall (All Time): #285,967 of 4,157,543Top 7%
16
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12352136 Downhole sand control screen system Jeremy Alexander Davis, Antonio Lazo, Reza Sarrafi-Nour 2025-07-08
11174711 Methods of coating a sand screen component Jeremy Alexander Davis, Antonio Lazo, Reza Sarrafi-Nour 2021-11-16
9685890 Flow induced electrostatic power generator for tubular segments Luis Phillipe Tosi, H. Mitchell Cornette 2017-06-20
9556712 Flow induced electrostatic power generator for tubular segments Luis Phillipe Tosi, H. Mitchell Cornette 2017-01-31
9371719 Controlling pressure during perforating operations 2016-06-21
9068431 Flow sensing apparatus and methods for use in oil and gas wells Luis Phillipe Tosi, William David Norman, Krystian K. Maskos 2015-06-30
8714239 Flow-induced electrostatic power generator for downhole use in oil and gas wells Luis Phillipe Tosi, H. Mitchell Cornette 2014-05-06
8511373 Flow-induced electrostatic power generator for downhole use in oil and gas wells Luis Phillipe Tosi, H. Mitchell Cornette 2013-08-20
6502635 Sub-sea membrane separation system with temperature control John Hampton 2003-01-07
6454836 Method and apparatus for wellbore gas separation Mark H. Koelmel, Stephen J. Miller, Curtis L. Munson, Rick A. Wright, Jean P. Camy +2 more 2002-09-24
5171460 Method for preventing metal carbonate scale formation in a well penetrating a subterranean formation 1992-12-15
4741400 Method for scale inhibition in a well penetrating a subterranean formation 1988-05-03
4664819 Proppant charge and method O. Howard Glaze 1987-05-12
4627496 Squeeze cement method using coiled tubing James D. Ashford, Terry Harrison, James K. Eastlack, Curtis G. Blount, Gary D. Herring 1986-12-09
4564459 Proppant charge and method O. Howard Glaze 1986-01-14
4443347 Proppant charge and method O. Howard Glaze 1984-04-17