Inventor

DEWAR JOHN ALEXANDER GORDON

NL2 patents

Patents

2 patents

US7578347B2Aug 25, 2009

Method of sealing an annular space in a wellbore

SHELL OIL CO44 citations90

US7546886B2Jun 16, 2009

Method of creating a borehole in an earth formation

SHELL OIL CO7 citations70