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Assignor Name : KEY ENERGY SERVICES, INC.

Total Assignments: 8

Assignment: 1

Reel/Frame:	013269/0063			Pages:	21
		Recorded:	09/09/2002
Conveyance:	SECURITY AGREEMENT

Assignor

KEY ENERGY SERVICES, INC.

Exec Dt:

08/16/2002

Assignee

PNC BANK, NATIONAL ASSOCIATION

249 FIFTH AVENUE

PITTSBURGH, PENNSYLVANIA 15222

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5711382	NONE		08506955	5988299	NONE		08623041	6079490	NONE		09058477
6377189	NONE		09281864	6212763	NONE		09342564	6276449	NONE		09533511
6253849	NONE		09534599	6209639	NONE		09534601	6213207	NONE		09535239
6241020	NONE		09535555	NONE	US20010000550		09752319	NONE	US20010000832		09752321
6374706	NONE		09768551	6728638	US20020156582		09838857	NONE	US20020153134		09839080
NONE	US20020156730		09839103	NONE	US20020156670		09839411	6826492	US20020156591		09839444
6578634	US20030042020		09945924	6758095	US20030188584		10046688	7006009	US20030183382		10113609

Correspondence name and address
	BUCHANAN INGERSOLL, P.C.
	CARLA J. VRSANSKY
	301 GRANT STREET
	29TH FLOOR
	PITTSBURGH, PA 15219

Assignment: 2

Reel/Frame:	014059/0689			Pages:	35
		Recorded:	04/29/2003
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignors

KEY ENERGY SERVICES, INC.

Exec Dt:

04/16/2003

BROOKS WELL SERVICING, INC.

Exec Dt:

04/16/2003

DAWSON PRODUCTION ACQUISITION CORP.

Exec Dt:

04/16/2003

DAWSON PRODUCTION MANAGEMENT, INC.

Exec Dt:

04/16/2003

DAWSON PRODUCTION TAYLOR, INC.

Exec Dt:

04/16/2003

KALKASKA OILFIELD SERVICES, INC.

Exec Dt:

04/16/2003

KEY ENERGY DRILLING, INC.

Exec Dt:

04/16/2003

KEY ENERGY SERVICES-CALIFORNIA, INC

Exec Dt:

04/16/2003

KEY ENERGY SERVICES-SOUTH TEXAS, INC.

Exec Dt:

04/16/2003

KEY FOUR CORNERS, INC.

Exec Dt:

04/16/2003

KEY ROCKY MOUNTAIN, INC.

Exec Dt:

04/16/2003

MISR KEY ENERGY SERVICES LLC

Exec Dt:

04/16/2003

Q SERVICES, INC

Exec Dt:

04/16/2003

Q.V. SERVICES INC.

Exec Dt:

04/16/2002

UNITRAK SERVICES HOLDING, INC.

Exec Dt:

04/16/2003

WATSON OILFIELD SERVICE & SUPPLY INC.

Exec Dt:

04/16/2003

WELL-CO OIL SERVICE, INC.

Exec Dt:

04/16/2003

WELLTECH EASTERN INC.

Exec Dt:

04/16/2003

WELLTECH MID-CONTINENT INC

Exec Dt:

04/16/2003

YALE E. KEY INC

Exec Dt:

04/16/2003

BROOKS WELL SERVICING BENEFICIAL, L.P.

Exec Dt:

04/16/2003

DAWSON PRODUCTION PARTNERS, L.P.

Exec Dt:

04/16/2003

KEY ENERGY DRILLING BENEFICIAL, L.P.

Exec Dt:

04/16/2003

Q.V. SERVICES BENEFICIAL, L.P.

Exec Dt:

04/16/2003

UNITRAK SERVICES, L.P.

Exec Dt:

04/16/2003

WELLTECH MID-CONTINENT BENEFICIAL, L.P.

Exec Dt:

04/16/2003

YALE E. KEY BENEFICIAL, L.P.

Exec Dt:

04/16/2003

AES ACQUISTION, L.P.

Exec Dt:

04/16/2003

Q PRODUCTION SERVICES, L.P.

Exec Dt:

04/16/2003

QUALITY OIL FIELD SERVICES, L.P.

Exec Dt:

04/16/2003

QUALITY TUBULAR SERVICES, L.P.

Exec Dt:

04/16/2003

Q.V. SERVICES, LLC

Exec Dt:

04/16/2003

Q.V. SERVICES OF TEXAS, L.P.

Exec Dt:

04/16/2003

BROOKS WELL SERVICING, LLC

Exec Dt:

04/16/2003

KEY ENERGY DRILLING LLC

Exec Dt:

04/16/2003

Q ENERGY SERVICES, L.L.C.

Exec Dt:

04/16/2003

Q OIL & GAS SERVICES, LLC

Exec Dt:

04/16/2003

UNITRAK SERVICES, LLC

Exec Dt:

04/16/2003

YALE E. KEY, LLC

Exec Dt:

04/16/2003

WELLTECH MID-CONTINENT LLC

Exec Dt:

04/16/2003

Assignee

PNC BANK, NATIONAL ASSOCIATION

249 FIFTH AVENUE

PITTSBURGH, PENNSYLVANIA 15222

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5711382	NONE		08506955	5988299	NONE		08623041	6079490	NONE		09058477
6168054	NONE		09200490	6377189	NONE		09281864	6212763	NONE		09342564
6276449	NONE		09533511	6253849	NONE		09534599	6209639	NONE		09534601
6213207	NONE		09535239	6241020	NONE		09535555	6164493	NONE		09566166
6374706	NONE		09768551	6728638	US20020156582		09838857	NONE	US20020153134		09839080
NONE	US20020156730		09839103	NONE	US20020156670		09839411	6826492	US20020156591		09839444
6578634	US20030042020		09945924	6758095	US20030188584		10046688	7006009	US20030183382		10113609
7004456	US20040065874		10263630

Correspondence name and address
	BUCHANAN INGERSOLL, P.C.
	MICHAEL L. DEVER
	301 GRANT STREET, 20TH FLOOR
	PITTSBURGH, PA 15219

Assignment: 3

Reel/Frame:	014119/0460			Pages:	34
		Recorded:	11/12/2003
Conveyance:	SECURITY INTEREST (SEE DOCUMENT FOR DETAILS).

Assignors

KEY ENERGY SERVICES, INC.

Exec Dt:

11/10/2003

BROOKS WELL SERVICING, INC.

Exec Dt:

11/10/2003

DAWSON PRODUCTION ACQUISITION CORP.

Exec Dt:

11/10/2003

DAWSON PRODUCTION MANAGEMENT, INC.

Exec Dt:

11/10/2003

DAWSON PRODUCTION TAYLOR, INC.

Exec Dt:

11/10/2003

KALKASKA OILFIELD SERVICES, INC.

Exec Dt:

11/10/2003

KEY ENERGY DRILLING, INC.

Exec Dt:

11/10/2003

KEY ENERGY SERVICES-CALIFORNIA, INC.

Exec Dt:

11/10/2003

KEY ENERGY SERVICES-SOUTH TEXAS, INC.

Exec Dt:

11/10/2003

KEY FOUR CORNERS, INC.

Exec Dt:

11/10/2003

KEY ROCKY MOUNTAIN, INC.

Exec Dt:

11/10/2003

MISR KEY ENERGY SERVICES, LLC

Exec Dt:

11/10/2003

Q SERVICES, INC.

Exec Dt:

11/10/2003

Q.V. SERVICES, INC.

Exec Dt:

11/10/2003

UNITRAK SERVICES HOLDING, INC.

Exec Dt:

11/10/2003

WATSON OILFIELD SERVICE & SUPPLY, INC.

Exec Dt:

11/10/2003

WELL-CO OIL SERVICE, INC.

Exec Dt:

11/10/2003

WELLTECH EASTERN, INC.

Exec Dt:

11/10/2003

WELLTECH MID-CONTINENT, INC.

Exec Dt:

11/10/2003

YALE E. KEY, INC.

Exec Dt:

11/10/2003

BROOKS WELL SERVICING BENEFICIAL, L.P.

Exec Dt:

11/10/2003

DAWSON PRODUCTION PARTNERS, L.P.

Exec Dt:

11/10/2003

KEY ENERGY DRILLING BENEFICIAL, L.P.

Exec Dt:

11/10/2003

Q.V. SERVICES BENEFICIAL, L.P.

Exec Dt:

11/10/2003

UNITRAK SERVICES, L.P.

Exec Dt:

11/10/2003

WELLTECH MID-CONTINENT BENEFICIAL, L.P.

Exec Dt:

11/10/2003

YALE E. KEY BENEFICIAL, L.P.

Exec Dt:

11/10/2003

AES ACQUISITION, L.P.

Exec Dt:

11/10/2003

Q PRODUCTION SERVICES, L.P.

Exec Dt:

11/10/2003

QUALITY OIL FIELD SERVICES, L.P.

Exec Dt:

11/10/2003

QUALITY TUBULAR SERVICES, L.P.

Exec Dt:

11/10/2003

Q.V. SERVICES OF TEXAS, L.P.

Exec Dt:

11/10/2003

BROOKS WELL SERVICING, LLC

Exec Dt:

11/10/2003

KEY ENERY DRILLING, LLC

Exec Dt:

11/10/2003

Q ENERGY SERVICES, L.L.C.

Exec Dt:

11/10/2003

Q OIL & GAS SERVICES, LLC

Exec Dt:

11/10/2003

Q.V. SERVICES, LLC

Exec Dt:

11/10/2003

UNITRAK SERVICES, LLC

Exec Dt:

11/10/2003

YALE E. KEY, LLC

Exec Dt:

11/10/2003

WELLTECH MID-CONTINENT, LLC

Exec Dt:

11/10/2003

Assignee

PNC BANK, NATIONAL ASSOCIATION

249 FIFTH AVENUE

ONE PNC PLAZA 2ND FLOOR

PITTSBURGH, PENNSYLVANIA 15222

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5711382	NONE		08506955	5988299	NONE		08623041	6079490	NONE		09058477
6168054	NONE		09200490	6377189	NONE		09281864	6212763	NONE		09342564
6276449	NONE		09533511	6253849	NONE		09534599	6209639	NONE		09534601
6213207	NONE		09535239	6241020	NONE		09535555	6164493	NONE		09566166
6374706	NONE		09768551	6728638	US20020156582		09838857	NONE	US20020153134		09839080
NONE	US20020156730		09839103	NONE	US20020156670		09839411	6826492	US20020156591		09839444
6578634	US20030042020		09945924	6758095	US20030188584		10046688	7006009	US20030183382		10113609
7004456	US20040065874		10263630	NONE	US20040226712		10437673	7064677	US20030196798		10440633

Correspondence name and address
	BUCHANAN INGERSOLL, P.C.
	MICHAEL L. DEVER
	301 GRANT STREET
	20TH FLOOR
	PITTSBURGH, PA 15219

Assignment: 4

Reel/Frame:	016427/0646			Pages:	27
		Recorded:	08/22/2005
Conveyance:	SECURITY AGREEMENT

Assignor

KEY ENERGY SERVICES, INC.

Exec Dt:

07/29/2005

Assignee

LEHMAN COMMERCIAL PAPER INC., AS COLLATERAL AGENT

745 SEVENTH AVENUE

NEW YORK, NEW YORK 10019

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5297631	NONE		08044187	5439066	NONE		08266011	5711382	NONE		08506955
5988299	NONE		08623041	6079490	NONE		09058477	6168054	NONE		09200490
6377189	NONE		09281864	6212763	NONE		09342564	6276449	NONE		09533511
6253849	NONE		09534599	6209639	NONE		09534601	6213207	NONE		09535239
6241020	NONE		09535555	6164493	NONE		09566166	6374706	NONE		09768551
6728638	US20020156582		09838857	NONE	US20020153134		09839080	NONE	US20020156730		09839103
NONE	US20020156670		09839411	6826492	US20020156591		09839444	6578634	US20030042020		09945924
6758095	US20030188584		10046688	7006009	US20030183382		10113609	7004456	US20040065874		10263630
6898985	NONE		10397796	NONE	US20040226712		10437673	7064677	US20030196798		10440633
NONE	US20040162658		10720594	7221155	US20040196032		10760650	7029422	US20040192507		10778835
7228899	US20040188088		10778846	7226037	US20060163545		10925813	7461830	US20050114001		10942730
7006920	US20050103491		10957309	7114577	US20050199388		11066576	NONE	US20050252279		11087366

Correspondence name and address
	LATHAM & WATKINS LLP
	650 TOWN CENTER DRIVE
	SUITE 2000
	COSTA MESA, CA 92626

Assignment: 5

Reel/Frame:	021185/0447			Pages:	9
		Recorded:	07/02/2008
Attorney Dkt #:	060877.091176
Conveyance:	SECURITY AGREEMENT

Assignor

KEY ENERGY SERVICES, INC.

Exec Dt:

06/30/2008

Assignee

BANK OF AMERICA, N.A.

231 SOUTH LASALLE ST.

CHICAGO, ILLINOIS 60697

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
6533519	NONE		09620580	6719515	US20030147726		10389026	6969223	US20040197166		10818575
7066266	US20050230117		10826783	7273104	US20060021753		11161185	7359801	US20070056746		11516105

Correspondence name and address
	CONSTANCE G. RHEBERGEN
	711 LOUISIANA
	SUITE 2300
	HOUSTON, TX 77002-2770

Assignment: 6

Reel/Frame:	024505/0957			Pages:	10
		Recorded:	06/10/2010
Attorney Dkt #:	08876.105061
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, INC.

Exec Dt:

06/01/2010

Assignee

KEY ENERGY SERVICES, LLC

1301 MCKINNEY STREET

SUITE 1800

HOUSTON, TEXAS 77010

Properties

Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #	Pat #	Pub #	Intl #	App #
5297631	NONE		08044187	5439066	NONE		08266011	5711382	NONE		08506955
5988299	NONE		08623041	6079490	NONE		09058477	6168054	NONE		09200490
6377189	NONE		09281864	6212763	NONE		09342564	6276449	NONE		09533511
6253849	NONE		09534599	6209639	NONE		09534601	6213207	NONE		09535239
6241020	NONE		09535555	6164493	NONE		09566166	6533519	NONE		09620580
6374706	NONE		09768551	6728638	US20020156582		09838857	6826492	US20020156591		09839444
6578634	US20030042020		09945924	6758095	US20030188584		10046688	7006009	US20030183382		10113609
7004456	US20040065874		10263630	6898983	US20040089076		10292715	6719515	US20030147726		10389026
7064677	US20030196798		10440633	7221155	US20040196032		10760650	7029422	US20040192507		10778835
7228899	US20040188088		10778846	6969223	US20040197166		10818575	7066266	US20050230117		10826783
7226037	US20060163545		10925813	7461830	US20050114001		10942730	7006920	US20050103491		10957309
7114577	US20050199388		11066576	7273104	US20060021753		11161185	7359801	US20070056746		11516105
7519508	US20070067107		11516153	7519475	US20070089878		11517919	7513338	US20070056811		11517920
NONE	US20070056727		11518701	7588083	US20080035333		11690483	7571054	US20080035334		11690904
7672785	US20080035335		11691031	7788054	US20070227225		11691163	7518526	US20080037368		11691219
7657376	US20070288169		11827052	7793918	US20090057630		11850391	7917293	US20090063054		11850398
7631563	US20090056467		11850405	8590401	US20100132180		12627529	8280639	US20100138159		12627542

Correspondence name and address
	KING & SPALDING LLP
	1100 LOUISIANA ST.
	SUITE 400 IP DEPARTMENT
	HOUSTON, TX 77002

Assignment: 7

Reel/Frame:	035318/0858			Pages:	10
		Recorded:	04/02/2015
Attorney Dkt #:	08876.105074 DIV US
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).

Assignor

KEY ENERGY SERVICES, INC.

Exec Dt:

06/01/2010

Assignee

KEY ENERGY SERVICES, LLC

1301 MCKINNEY STREET

SUITE 1800

HOUSTON, TEXAS 77010

Property

Pat #

Pub #

Intl #

App #

9027416

US20140174731

14050197

Correspondence name and address
	KING & SPALDING LLP
	1100 LOUISIANA STREET
	SUITE 4000 IP DEPARTMENT
	HOUSTON, TX 77002

Assignment: 8

Reel/Frame:	029296/0386			Pages:	5
		Recorded:	11/14/2012
Attorney Dkt #:	08876.105058 DIV1
Conveyance:	ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).