Patent Assignment
Reel/Frame 017275/0188
Change of Name
Recorded: 2005-07-01
Pages: 3
Assignor
COMPUTALOG LTD.
Executed: 2001-12-31
Assignee
PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
4200, 150 - 6 AVENUE SW, CALGARY, ALBERTA, T2P 3Y7, CANADA
Covered Properties
(12)
Compressive Seal and Pressure Control Arrangements for Downhole Tools
Patent:
5,067,874 →
Application:
07/508,974 →
Method and Apparatus for the Determination of Formation Fluid Flow Rates and Reservoir Deliverability
Patent:
5,337,821 →
Application:
08/014,132 →
Self-Adjusting Centralizer
Patent:
5,348,091 →
Application:
08/107,092 →
Switch Actuator and Flow Restrictor Pilot Valve Assembly for Measurement While Drilling Tools
Patent:
5,660,238 →
Application:
08/585,799 →
Method and System for Skin Effect Correction in a Multiple Transmit Frequency Induction Logging System
Patent:
5,698,982 →
Application:
08/617,418 →
Formation Density Measurement Utilizing Pulsed Neutrons
Patent:
5,900,627 →
Application:
08/878,545 →
Pulser
Patent:
6,002,643 →
Application:
08/917,624 →
Data Aquisition and Reduction Method for Multi-Component Flow
Patent:
6,028,307 →
Application:
08/939,247 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,050,141 →
Application:
09/141,796 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,189,383 →
Application:
09/329,215 →
Method and Apparatus for Acoustic Logging of Fluid Density and Wet Cement Plugs in Boreholes
Patent:
6,538,958 →
Application:
09/443,409 →
Perforating Gun Firing Head with Vented Block for Holding Detonator
Related Assignments
(12)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Aug 27, 2001
From: AQRIT INDUSTRIES LTD.
To: PRECISION DRILLING CORPORATION
Reel/Frame 012124/0371 →
Assignment of Assignor's Interest
Dec 12, 2001
From: PRECISION DRILLING CORPORATION
To: COMPUTALOG LTD.
Reel/Frame 012365/0043 →
Assignment of Assignor's Interest
Apr 12, 2005
From: COMPUTALOG RESEARCH, INC.
To: COMPUTALOG USA, INC.
Reel/Frame 016446/0373 →
Change of Name
Aug 3, 2005
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
To: PRECISION ENERGY SERVICES, LTD.
Reel/Frame 016345/0078 →
Assignment of Assignor's Interest
Aug 19, 2005
From: TROTECHAUD, KEVIN
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUPD, INC.
Reel/Frame 016903/0617 →
Merger
Sep 19, 2005
From: COMPUTALOG RESEARCH, INC.
To: COMPUTALOG USA, INC.
Reel/Frame 016814/0219 →
Change of Name
Feb 7, 2006
From: COMPUTALOG LTD.
To: PRECISION DRILLING TECHNOLOGY SERVICES GROUP, INC.
Reel/Frame 017230/0980 →
Assignment of Assignor's Interest
Apr 21, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017507/0031 →
Change of Name
Apr 21, 2006
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
To: PRECISION ENERGY SERVICES LTD.
Reel/Frame 017507/0063 →
Assignment of Assignor's Interest
Apr 24, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017519/0043 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →
Assignment of Assignor's Interest
May 22, 2017
From: WEATHERFORD CANADA PARTNERSHIP
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 042457/0086 →