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Patent Assignment Details

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Reel/Frame:	006968/0187			Pages:	9
		Recorded:	04/26/1994
Conveyance:	RELEASE FROM SECURITY AGREEMENT

Total properties: 34

Patent #:	4133470	Issue Dt:		Application #:	05890034	Filing Dt:
Title:

Patent #:	4244424	Issue Dt:	01/13/1981	Application #:	06024523	Filing Dt:	03/28/1979
Title:	MAGNETIC CASING DEPTH MARKER

Patent #:	4335352	Issue Dt:	06/15/1982	Application #:	06102790	Filing Dt:	12/12/1979
Title:	YIELD STRENGTH DETERMINATION OF TERROMGNETIC MATERIALS

Patent #:	4328865	Issue Dt:	05/11/1982	Application #:	06177398	Filing Dt:	08/12/1980
Title:	WAX CONTROL IN OIL WELLS USING A THERMAL SYPHON SYSTEM

Patent #:	4460202	Issue Dt:	07/17/1984	Application #:	06210479	Filing Dt:	11/26/1980
Title:	INTERMEDIATE WEIGHT DRILL STRING MEMBER

Patent #:	4589495	Issue Dt:	05/20/1986	Application #:	06601938	Filing Dt:	04/19/1984
Title:	APPARATUS AND METHOD FOR INSERTING FLOW CONTROL MEANS INTO A WELL CASING

Patent #:	4618009	Issue Dt:	10/21/1986	Application #:	06638700	Filing Dt:	08/08/1984
Title:	REAMING TOOL

Patent #:	4625762	Issue Dt:	12/02/1986	Application #:	06796665	Filing Dt:	11/08/1985
Title:	AUTO-FILL FLOW VALVE

Patent #:	4706747	Issue Dt:	11/17/1987	Application #:	06801521	Filing Dt:	11/25/1985
Title:	CEMENTING PLUG

Patent #:	4655247	Issue Dt:	04/07/1987	Application #:	06820544	Filing Dt:	01/17/1986
Title:	BALL-TYPE CHECK VALVE ASSEMBLY

Patent #:	4674569	Issue Dt:	06/23/1987	Application #:	06845613	Filing Dt:	03/28/1986
Title:	STAGE CEMENTING TOOL

Patent #:	4756365	Issue Dt:	07/12/1988	Application #:	06903818	Filing Dt:	09/04/1986
Title:	CEMENTING PLUG

Patent #:	4717290	Issue Dt:	01/05/1988	Application #:	06942979	Filing Dt:	12/17/1986
Title:	MILLING TOOL

Patent #:	4787458	Issue Dt:	11/29/1988	Application #:	07056488	Filing Dt:	05/29/1987
Title:	SPRING BOW, CENTRALIZER, AND RELATED METHODS

Patent #:	4811800	Issue Dt:	03/14/1989	Application #:	07111222	Filing Dt:	10/22/1987
Title:	METHOD AND APPARATUS FOR DETECTING THE DENSITY OF THICKNESS AND DRILLING

Patent #:	4794986	Issue Dt:	01/03/1989	Application #:	07126193	Filing Dt:	11/27/1987
Title:	RETICULATED CENTRALIZING APPARATUS

Patent #:	4842062	Issue Dt:	06/27/1989	Application #:	07152934	Filing Dt:	02/05/1988
Title:	HYDRAULIC LOCK ALLEVIATION DEVICE, WELL CEMENTING STAGE TOOL, AND RELATED METHODS

Patent #:	4979562	Issue Dt:	12/25/1990	Application #:	07261385	Filing Dt:	10/21/1988
Title:	FLOAT EQUIPMENT INCLUDING FLOAT COLLARS AND MODULAR PLUGS FOR WELL OPERATIONS

Patent #:	4945947	Issue Dt:	08/07/1990	Application #:	07357121	Filing Dt:	05/26/1989
Title:	BALL-TYPE CHECK VALVE

Patent #:	4984633	Issue Dt:	01/15/1991	Application #:	07424092	Filing Dt:	10/20/1989
Title:	NOZZLE EFFECT PROTECTORS, CENTRALIZERS, AND STABILIZERS AND RELATED METHODS

Patent #:	5025858	Issue Dt:	06/25/1991	Application #:	07517925	Filing Dt:	05/02/1990
Title:	WELL APPARATUSES AND ANTI-ROTATION DEVICE FOR WELL APPARATUSES

Patent #:	5245877	Issue Dt:	09/21/1993	Application #:	07668199	Filing Dt:	03/12/1991
Title:	TONG LOAD CELL ASSEMBLY

Patent #:	5146989	Issue Dt:	09/15/1992	Application #:	07671812	Filing Dt:	04/02/1991
Title:	APPARATUS FOR RECOVERING A WELLHEAD

Patent #:	5113940	Issue Dt:	05/19/1992	Application #:	07700622	Filing Dt:	05/15/1991
Title:	WELL APPARATUSES AND ANTI-ROTATION DEVICE FOR WELL APPARATUSES

Patent #:	5181564	Issue Dt:	01/26/1993	Application #:	07774048	Filing Dt:	10/08/1991
Title:	MILLING TOOL

Patent #:	5195361	Issue Dt:	03/23/1993	Application #:	07797682	Filing Dt:	11/25/1991
Title:	TEST METHOD AND APPARATUS FOR BOP EQUIPMENT

Patent #:	5207128	Issue Dt:	05/04/1993	Application #:	07855561	Filing Dt:	03/23/1992
Title:	TONG WITH FLOATING JAWS

Patent #:	5246069	Issue Dt:	09/21/1993	Application #:	07856098	Filing Dt:	03/23/1992
Title:	SELF-ALIGNING WELL APPARATUSES AND ANTI-ROTATION DEVICE FOR WELL APPARATUSES

Patent #:	5305740	Issue Dt:	04/26/1994	Application #:	07878784	Filing Dt:	05/06/1992
Title:	SEALING MEANS FOR ENDOTRACHEAL TUBES

Patent #:	5253710	Issue Dt:	10/19/1993	Application #:	07951305	Filing Dt:	09/22/1992
Title:	METHOD AND APPARATUS TO CUT AND REMOVE CASING

Patent #:	4023092	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Patent #:	4033413	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Patent #:	4119151	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Patent #:	4159742	Issue Dt:		Application #:	UNAVAILABLE	Filing Dt:
Title:

Assignor

TEXAS COMMERCE BANK NATIONAL ASSOCIATION

Exec Dt:

04/15/1994

Assignee

WEATHERFORD U.S., INC.

1360 POST OAK BLVD., SUITE 1000

HOUSTON, TEXAS 77056

Correspondence name and address
	FULBRIGHT & JAWORSKI L.L.P.
	JOHN M. MINGS
	1301 MCKINNEY
	#5100
	HOUSTON, TX 77010-3095

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