Inventor

ERVIN DAVID L

US3 patents

⚠️ This page may combine multiple inventors who share the name “ERVIN DAVID L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ERVIN DAVID L

2 patents

US8820437B2Sep 2, 2014

Cementing whipstock apparatus and methods

ERVIN DAVID L12 citations80

US8590623B2Nov 26, 2013

Downhole tools and methods of setting in a wellbore

ERVIN DAVID L1 citations42

SMITH INTERNATIONAL

1 patent

US9151136B2Oct 6, 2015

Cementing whipstock apparatus and methods

SMITH INTERNATIONAL1 citations44