P

Inventor

JOHNSON ASHLEY B

US10 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON ASHLEY B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SCHLUMBERGER TECHNOLOGY CORP

7 patents
US6732798B2May 11, 2004

Controlling transient underbalance in a wellbore

SCHLUMBERGER TECHNOLOGY CORP96 citations97
US6598682B2Jul 29, 2003

Reservoir communication with a wellbore

SCHLUMBERGER TECHNOLOGY CORP150 citations97
US6966377B2Nov 22, 2005

Providing a low pressure condition in a wellbore region

SCHLUMBERGER TECHNOLOGY CORP39 citations95
US6874579B2Apr 5, 2005

Creating an underbalance condition in a wellbore

SCHLUMBERGER TECHNOLOGY CORP44 citations95
US6397864B1Jun 4, 2002

Nozzle arrangement for well cleaning apparatus

SCHLUMBERGER TECHNOLOGY CORP40 citations92
US8347963B2Jan 8, 2013

Controlling transient underbalance in a wellbore

SCHLUMBERGER TECHNOLOGY CORP9 citations83
US7621339B2Nov 24, 2009

Downhole production and injection pump system

SCHLUMBERGER TECHNOLOGY CORP1 citations42

DOLMAN LEE

1 patent
US8172007B2May 8, 2012

System and method of monitoring flow in a wellbore

DOLMAN LEE37 citations85

DOLMAN LEE F

1 patent
US8307913B2Nov 13, 2012

Drilling system with drill string valves

DOLMAN LEE F17 citations75

JOHNSON ASHLEY B

1 patent
US8225872B2Jul 24, 2012

Gas handling in a well environment

JOHNSON ASHLEY B1 citations45