Mark Identification

GRAVITY MWD

Serial Number

78203714

Filing Date

Jan 15, 2003

Registration Date

Jun 15, 2004

Trademark by

SCHLUMBERGER TECHNOLOGY CORPORATION

Classification Information

directional and horizontal drilling services for oil and gas wells and boreholes

Building Construction and Repair

well logging and oil field surveying services featuring measurement while drilling and logging while drilling; providing drilling azimuth information, depth determination and oil drilling control services

Computer and Scientific