Robert W. Evans

HS Halliburton Energy Services: 2 patents #150 of 703Top 25%

📍 Leonidas, TX: #1 of 5 inventorsTop 20%

🗺 Texas: #1,482 of 14,752 inventorsTop 15%

Overall (2016): #57,686 of 481,213Top 15%

Patents 2016

Issued Patents 2016

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
9428980	Hydraulic/mechanical tight hole jar	—	2016-08-30
9328567	Double-acting shock damper for a downhole assembly	—	2016-05-03
9255456	Method and apparatus for improving the efficiency of a positive displacement motor for drilling and oil or gas well	—	2016-02-09