Patent Assignment
Reel/Frame 022460/0304
Release of Security Interest
Recorded: 2009-03-27
Pages: 5
Assignor
WELLS FARGO BANK, NATIONAL ASSOCIATION (AS ADMINISTRATIVE AGENT)
Executed: 2008-08-22
Assignee
PATHFINDER ENERGY SERVICES, INC.
15151 SOMMERMEYER ST., HOUSTON, TEXAS, 77041
Covered Properties
(23)
Sprung Member and Actuator for Downhole Tools
Passive Ranging Techniques in Borehole Surveying
Downhole Referencing Techniques in Borehole Surveying
Optimized Battery Life in Multiple Battery Applications
Series-Resonant Tuning of a Downhole Loop Antenna
Matching Layer Assembly for a Downhole Acoustic Sensor
Composite Backing Layer for a Downhole Acoustic Sensor
Acoustic Sensor for Downhole Measurement Tool
Pressure Controlled Fluid Sampling Apparatus and Method
Adjustment for Frequency Dispersion Effects in Electromagnetic Logging Data
Method of Estimating Electrical Parameters of an Earth Formation with a Simplified Measurement Device Model
Well Twinning Techniques in Borehole Surveying
Electrical Connector Useful in Wet Environments
Shear Wave Velocity Determination Using Multi-Pole Wave
Enhanced Measurement of Azimuthal Dependence of Subterranean Parameters
Determining a Borehole Azimuth from Tool Face Measurements
Gravity azimuth techniques in borehole surveying
Application:
60/417,304 →
Adjustment for frequency dispersion effects in electromagnetic logging data
Application:
60/466,533 →
Encoding data in a sequence of rotational speed variations of a drill string
Application:
60/484,042 →
Electrical connection useful in wet environments
Application:
60/489,565 →
Apparatus for obtaining high quality formation fluid samples
Application:
60/492,483 →
Drilling fluid filter assembly having a bypass passageway
Application:
60/527,614 →
Azimuthally focused electromagnetic measurement tool
Application:
60/548,928 →
Related Assignments
(4)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Feb 10, 2009
From: PATHFINDER ENERGY SERVICES, INC.
To: SMITH INTERNATIONAL, INC.
Reel/Frame 022231/0733 →
Release of Security Interest
Mar 27, 2009
From: WELLS FARGO BANK, NATIONAL ASSOCIATION (AS ADMINISTRATIVE AGENT)
To: PATHFINDER ENERGY SERVICES, INC.
Reel/Frame 022460/0309 →
Release of Security Interest
Apr 8, 2009
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS SUCCESSOR BY MERGER TO WELLS FARGO BANK TEXAS, N.A. (AS ADMINISTRATIVE AGENT)
To: PATHFINDER ENERGY SERVICES, INC.
Reel/Frame 022520/0358 →
Assignment of Assignor's Interest
Oct 17, 2012
From: SMITH INTERNATIONAL, INC.
To: SCHLUMBERGER TECHNOLOGY CORPORATION
Reel/Frame 029143/0015 →