Inventor
DOORNBOSCH FOKKO HARM CORNELIS
NL4 patents
Patents
4 patentsUS6732798B2May 11, 2004
Controlling transient underbalance in a wellbore
SCHLUMBERGER TECHNOLOGY CORP96 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
US8347963B2Jan 8, 2013
Controlling transient underbalance in a wellbore
SCHLUMBERGER TECHNOLOGY CORP9 citations83