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New Orleans, Louisiana July 16, 1990

C H A R L E S • O R i P F I S R I C H A R D w R E V E L S . J R J O S E P H P H E B E R T M A R O U E R ' T E A N O O N A N D A v i O w . L E E P E J A M E S O . M c M I C H A E L R I C H A R D E A N D E R S O N W M B L A K E B E N N E T T M A R K A . L O W E O E O R O E DC N CO R C . J R O O N K M A T C R A P T E D W I N W D E N N A R O W M C R A I O W T M A N C A T H E R . N E H B R O W N J A M E S A B I - O W N O E O R O E O T R N E S T XS R K E I T H J A R R E T T C H E R Y L V C U N N I N G H A M ST r v i A M W A L T H E R R O B E R T S A N O E L I C O R O B E R T L T H L R l O T O E N A L O L I V I E R O E O R O E A R C E N E A U X SX R E O l N A * P U H R T M A R I E B R E A U X S T R O U D J O N A T H A N A H U N T E R O A N i E L E L O O R O N E B R Y A N D S C U P I E L D T H O M A S R D I A Z J O H N m O U I L L C R T M A R T S J O H N S O N K A T H L E E N F K E T C H U M I N O E R M S J O S T R O M S C O T T C S E I L E R C E C I L Y E L L E E V B A T E M A N C H E R Y L M O L L E N C K O R N I C K M A R K O L--.TMAM S H A N N O N S K E L T O M H O L T Z M

O F C O U N S E L W L U A M M M E Y E R S C H A R L E S C O R C M I L A J O N R O B E R T C S M I T H

Mr. J. Rogers Pearcr U.S. Oepartment of the I n t e r i o r Minerals Management Service Gulf cf Mexico OCS Region 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Re: Lease Nos. OCS-G 3818, 5525, 1618 and 5800

R E C E I V E D

JO I IV »w

Mineral, Manage* Service Uasing i Environment

Dear Mr. Pearcy:

Enclosed please f i n d an Act of Fu l l Release (the "Ful l Release") dated June 25, 1990, by Wells Fargo Bank, National Association releasing and discharging that certain Act of Collateral Mortgage and Collateral Chattel Mortgage dated October 20, 1988, executed by Dual Marine D r i l l i n g Company.

In order that t h i r d parties w i l l be put on notice as to the execution and efficacy of the enclosed Full Release, please f i l e the enclosed Full Release i n the f i l e s of your o f f i c e relating t o Lease Nos. OCS-G 3818, 5525, 1618 and 5800. Also enclosed for your use i s an additional copy of t h i s l e t t e r .

Enclosed you w i l l f i n e our firm's check i n the amount of $100.00 i n payment of your f i l i n g tees. Please acknowledge that the foregoing f i l i n g s have been completed as requested by signing

LISKOW & LEW

J u l y 16, 1990 P A G E

2

a counterpart o f t h i s l a t t a r i n t ha spaca providad balow and r e t u m i n g a copy o f t h i s l a t t a r t o t ha undersigned.

GZD/plg Enclosures

FILED AHD ACCOMPLISHED AS REQUESTED:

MINERALS MANAGEMENT SERVICE GULF OF MEXIOO OCS REGION

Very t r u l y yours ,

George Denegre, J r .

BY:

PATE: A

MHIHUEJ

ACT QF f P H MLBAgg R E C E I V E D

JUL U' i99o STATE OF CALIFORNIA ™«s Management Serv/ce

^ « Environment CITY AND COUNTY OF SAN FRANCISCO

BE IT KNOWN, that on this day of June, 1990,

BEFORE ME, tha undersigned, a Notary Public, duly

commissioned and qualified in and fcr the County and Stata

aforesaid, and in the presence of tha undersigned witnesses:

NATIONAL ASSOCIATION, a national banking association ("Bank") who

presented to me. Notary, as ful ly paid, cancelled and acquitted,

ona certain Promissory Note made by Dual Marine Dri l l ing Conpany,

datad October 20, 1988, in the principal sun of FIFTY MILLION AND

NO/100 DOLLARS ($50,000,000.00) (tha "Mortgage Note"), nade

payable to bearer, on demand, which Mortgage Note i s secured by an

Act of Collateral Mortgage and Collateral Chattel Mortgage by Dual

Marina Drilling Conpany datad October 20, 1988 (the "Mortgage"),

which Mortgage i a f i l e d for record aa followa:

PARISH DATE RECORDATION INFORMATION

Lafourche 10/24/88 MOB 553, folio 1

PERSONALLY CAME AND APPEARED: WELLS FARGO BANK,

Chattel Register #3, folio 43, Mortgage and Collateral Entry No. 690091

St. Mary 10/24/88 MOB 578, Entry No. 184,721 Chattel MOB 243, Entry No. 287,915

Terrebonne 10/25/88 MOB 788, Entry No. 834527 Chattel Entry No. 834527

Lafayette 10/24/88

Iberia 10/24/88

Plaquenines 10/28/88

Minerals Managaaant 10/25/88 Sarvice

Mortgage Entry No. 88-032192 Chattel Entry No. 326618

MOB A549, Entry No. 88-6963 Chattel Entry No. 88-4785

MOB 185, folio 89 Chattel MOB 44, folio 3770

Lease File Nos. OCS-G 1618, 3818, 5525 and 5800

Also executed in connection with the Mortgage was a

Notice of Se urity Interest by Dual Marina Drilling Coapany and

Bank dated October 20, 1988 (the "Notice"), and filed for record

as follows:

PARISH RECORDATION INFORMATION

Orleans chattel Mortgage Book 2663, folio 96

Bank declared further that tha Mortgage Note having baan

paid in f u l l . Bank, aa tha laat holder thereof, doea hereby grant

a full and complete release and discharge of tha Mortgage, and tha

Notice and does haraby authorize and direct tha Recorded of

Mortgages for tha Parishes of Lafourche, St. Mary, Terrebonne,

Lafayette, Iberia, Plaquemines, and Orlaana, Louisiana to cancel

and erase entirely froa thair records tha inscription of said

Acts. Bank ia alao executing thia Act of Full Release to ba filed

with the Naw Orleans Outer Continental Shalf Offica of the

Minerals Management Service, Departaent of tha Interior (tha

"MMS") in the f i l e s relating to lease numbers OCS-G 1613, 3 8'.8,

5525 and 5800 to evidence the f u l l release and discharge granted

herein.

Z, said Notary, having cancelled tha signature and

notarial paraphs on the Mortgage Note, having annexed the original

of the same to the counterpart of this Act of Pull Release to be

filed in Terrebonne Parish, and photocopies of tha Mortgage Note

to the counterpart to be filed in tha othar louiaiana parishes and

vith the MMS.

THUS DONE AND PASSED on tha day, month and yaar herein

f i r s t above written, in the presence of tha undersigned competent

witnesses who hereunto sign their names with Bank and ma, Notary,

aftar a raading of tha whola.

WITNESSES:

07727282X0

WELLS FARGO BANK, NATIONAL ASSOCIATION y

O F F I C I A L S E A L

THELMA CW NG WTttY Pjtflie UtrfCPKIA

City & County of San Francsco

$50,000,000.00

COLLATERAL MOPTGAGE NOTE Nfey

October 20, 1988

FOR VALUE RECEIVED, on den and, DUAL MARINE DRILLING

COMPANY promises to pay to Bearer at the sain off ieaa of

Wells Fargo Bank, National Association, 464 California

Street, San Francisco, CA 94104, the principal sum of FIFTY

MILLION AND NO/100 DOLLARS ($50,000,000.00), together with

intereat thereon at the rate of eighteen percert (18%) per

annua froa the date hereof until paid.

In caae this Note should be placed in the hands

of an attorney-at-law to institute legal proceedings to

recover the aaount hereof or any part hereof, in principal

or intaraat, or to protect tha interests of the holder or

holders haraof, or in case the same should bc r aced in tha

hands of an attorney for collection, compromise or other

action, the Maker of this Note hereby agrees to pay the fee

of the attorney vho aay be employed for tbat purpose, vhich

fee i s hereby fixed at ten percent (10%) of the amount due

or sued for or claimed or sought to be protected, preserved

or enforced.

The Maker of this Note and the endorsers,

guarantors and sureties hereon hereby severally waive

presentment for payment, demand, notice of nonpayment.

protest, and a l l pleas of diviaion and discussion, and agree

that tha tlaa of payment hereof aay be extended from time

to tima, ona or more times vithout notice of such extension

or extensions and vithout previous consent, hereby binding

themselves, in solido, unconditionally, and as original

promiasors, for the payment hereof in principal, interest,

costs and attorney's fees. No delay on the part, of the

holder hereof in exercising any rights hereunder shall

operate as a valvar of such rights.

THIS COLLATERAL MORTGAGE NOTE SHALL BE GOVERNED

BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE

OF LOUISIANA.

-2-

( M H ) BOUDREAUX CMk

h o n • T » . 0 « « « P. a Bos 18«W

CLERK OF COURT t - O m c i o RacoBDSB AJTD N O T A I T P U B L I C

HOUMA, LA. 70361

STATE OF LOUISIANA OFFICE OF THE CLERK OF COURT

PARISH OF TERREBONNE 32ND JUDICIAL DISTRICT COURT

I HEREBY CERTIFY that the above and foregoing is a true and correct copy

of the original promiaaory note, which is recorded as a part of an Act of Full

Release dated, June 25th, 1990 made by Dual Marine Drilling Company in favor of

Wells Fargo Bank, National Association, which was recorded in the records of

Terrebonne Pariah, on July 13th, 1990, at 1:08 P.M. in Mortgage Book B39, Entry

No. 867573 and the original note will remain permanently in the records of this

Parish.

IN TESTIMONY WHEREOF witneaa my hand and off ic ial aeal, thia 13th day of

July , A.D., 1990 at Houma, Louisiana.

Dy Clerk of Court and Ex-Officio Notary Public, Parish of Terrebonne

W I L L I A M M M C l C I t R O B E R T T. J O K O C N

CHMLCL C. ORSMILLION O C N f W L A F I TTC • I L L Y M . M I N K S J A M E S L_ P E L L E T I E R T M O M A S D H A R D E M A N J O H N M l . K I N O C O W A R D j . O A V m

K E N N E T H X . G O R D O N . J R . W l L L J A M I a . R ITTS

L E O N J . N C T H O N O i J R . J . B E R R Y ST. J O H N . J R O O N A L O R. A B A U N I A J O H N M W I L S O N C H A R L C S M . S T E E N L A W N C N C C R S I M O N . J R ' " f D O . i C H W B R A O L E T • C « «5Y M M A S S A R I - O C M C P E N O V E R T M O M A S r. O E T T S N O E O R O E M . R O B I N S O N . J R .

M A R I L Y N C . K . A L O N C T J O S E P M c . o ; a u o . J R . • R U C C J . O R E C K P A T R I C K W O R A Y D E B O R A H B A M N P R I C E R O M « T E . H O L D C N

T M O M A S M . M C N A M A R A J A M E S M M A N S F I E L O S l B I L L Y J l . D O M I N O U E L A M B E R T M. L A P E R O U S E F R A N K E . M A S S E N O A L S P H I L I P K . J O N C S . J R .

L I S K O W & L E W I S A P R O F E S S I O N A L L A W C O R P O R A T I O N

A T T O R N E Y S A T L A W

N E W O R L E A N S , L A 7 0 1 3 9 - 5 0 0 1

F I F T I E T H F L O O R

T E L E P H O N E I S 0 4 I B S I - T B 7 B

T E L E X S T I O l I L I S K O W N L N )

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I I 0 4 I B B S - B I O S )

L A F A Y E T T E , L A 7 0 5 0 5 - 2 0 0 8 B E * H A R D I N G S T R E E T

P O . B O K B S O O S )

T E L E P H O N E U I O ) I K - T 4 I 4

TWK S I O W O - M f t * I L I S H O W L A F )

T E L S C O R I E R I J i O l l O T - x i a O

New Orleans, Louis iana June 2, 1989

C H A R L E S a . O R I F F I S

R I C H A R D W R E V E L S . J R J O S E P H P H E B E R T M A R O U E R I T E A N O O N A N B R U C E V S C H C W C D J V I D W LC CFC J A M E S O M C M I C M A S L R I C H A R O E A N O C R S O N W M . B L A K E B E N N E T T M A R K A . L O W E O E O R O E O E M E O R C . J R . O O N H. H A Y C R A F T E D W I N W O E N N A R O W M . C R A I O W Y M A N C A T H E R I N E H B R O W N J A M E S A . B R O W N O E O R O E O. E R N E S T B I B . K E r T M J A R R E 11 C H C R Y L V C U N N I N O H A M S T K V 1 A M . W A L T H E H R O B E R T S A N O E U C O R O B E R T L T H K R I O T D S N A L O L i v i C R O E O R O E A R C C N C A U X S l R E O I N A R. P U M N V » 1 0 » ; w O. W E I N S T O C K M A T T H E W K. B R O W N M A R I E B R E A U K S T R O U D J O N A T H A N A . H U N T E R O S W A L O P S O S R I N O J O H N R C E K I B E O A N l E L C LAO B O N K B R Y A N O. S C O F I E L O T H O M A S R D I A Z O A V I D P O O U O H T T J O H N R 3 U I L L O R Y M A R Y S. J O H N S O N K A T H L E E N F. K E T C H U M

J U L I E K. S C H W A R T I

Mr. J. Rogers Pearcy U.S. Departaent of the In t e r i o r Minerals Management Service Gulf of Mexico OCS P.egion 1201 Elmwood Park Boulevard Naw Orleans, Louisiana 70123-2394

Re: Lease No. OCS-G 1618, 3818, 4935 and 5525

Dear Mr. Pearcy:

Enclosed please f i n d an Act of Full Release (the "Full Release") dated May 19, 1989, by Hells Fargo Bank, National Association releasing and discharging that certain Act of Collateral Mortgage and Collateral Chattel Mortgage dated November 8, 1985, executed by Dual Rigs, Ltd.

In order that t h i r d partiea w i l l be put on notice as to the execution and efficacy of the enclosed Full Release, please f i l e the enclosed F u l l Release i n the f i l e s of your o f f i c e r e l a t i n g to Leasa No. OCS-G 1618 and place an o r i g i n a l of t h i s l e t t e r i n each of the lease f i l e s related t o the captioned leases. Also enclosed f o r your uae i s an additional copy of t h i s l e t t e r .

Enclosed you w i l l f i n d our firm's check i n the amount of $100.00 i n payment of your f i l i n g fees. Please acknowledge that the tor ego ing f i l i n g s have been completed as requested by signing

THESE DOCUMENTS WILL BE FOUND AT MORTO.iJE FILE M. /6/B

LISKOW & L E W I S

June 2 . 1989

a counterpart of this letter in the space provided below and returning a copy of this letter to thj undersigned.

Very truly yours.

George Denegre, J r .

GDJr/sl Enclosures

FILED AND ACCOMPLISHED AS REQUESTED:

MINERALS MANAGEMENT SERVICE GULF OF MEXICO OCS REGION

Ruby/I. Boehm DATE: June 5. 1989

019023lglu

W I L L I A M M H R t M ' R O B E R T T. J O R C E N * CHARLES C. ORSUILLION* O C N C »• i j A r r r r c * B I L L Y M. H I N E S * J « " U L- P E L L E T I E R * T H O M A S O. H A R O t f M A N * J O H N M. HI N O * E D W A R D J . O A T B l * K E N N E T H K. O O R O O N . J R . * W I L L I A M R R I T T S * L C O N J . R E Y M O N D . J R . *

J . B C R R Y S T J O H N . J R * D O N A L D R. A B A U N Z A * J O H N M W I L S O N * C H A R L E S M. S T E E N * L A W R E N C E R S ' M O N . J R . * F R E D E R I C K W B R A D L E Y * K t » > . ' M. I* A S B A R • * * . O E N E r C N O L E R * T M O M A S P. O E T T i N * O E O R O E H R O a i N S O l J R . * C E O R O C J . D O M A S * M A R I L Y N C . M A L O N E Y * J O S E P M C . O I O U O . J R . * B R U C E J . O R E C K P A T R I C K W O R A Y D E B O R A H B A H N P R I C E R O B E R T E . H O L D E N J O E B . N O R M A N T H O M A S M. MCNAMARA J A M E S N. M A N S ' I E L D IB B I L L Y J . O O M I N O U E L A M B E R T M. L A P E R O U S E P R A N K E . M A S S E N O A L C P M I U P K. J O N E S . J R . A I N C C T A T S W I L L I A M w P U S H J U L I E C B C I I — R I I

L I S K O W & L E W I S

A T T O R N E Y S A T L A W

N E W O R L E A N S , L A 7 0 1 3 9 - S O O I

9280.015/GDJr

F I F T I E T H F L O O R

T S L S P H O N E I B O A I B B I - 7 0 7 B

T E L E X S S S S O I I L I B K O W N L N )

T E L E C O P I E R I S O J I B B S - B I O S

I S O A I B B S - S I O B

L A F A Y E T T E , L A . 7 0 S O B - 2 0 0 S

p o. BOX saoos T S L S P H O N E t a i a i U S - T A S A

T W X B I O O O O - J A O * I L I B K O W L A P )

T E L E C O P I E R I S I S ) X 0 7 - I J O O

New Orleans, LA 70139 October 25, 1988

C H A R L E S B . O R l P P l S R I C H A R D W R E V E L S . J N . J O S E P H R H E B S R T M A R O U C R I T E A N O O N A l J B R U C E V. S C H E W K D A V I D w L E C F C J A M E S O. M c M I C H A E L R I C H A R D C. A N O K R S O M W M . B L A K E B E N N E T T H A M A L O W E O E O R O E O E N E O R K . J R . O O N K. H A T C R A F T E D W I N W O E N N A R D W M . C R A I O W V M A N C A T H E R I N E H . B R O W 4 J A M E S A B R O W N O E O R O E O . E R N E S T B f I I . K E I T H J A R R E T T C H E R Y L V C U N N I N O H A M STE" HA M . W A L T H E R R O B E R T S . A N O E L l C O R O B E R T L. T H E R I O T O E M A L O L I V I E R O E O R O E A B C C N C A U X B l • CO I N A R. P U H R V A N D R E W O. W E I N S T O C K M A T T H E W K. B R O W N M A H I F B R E A U X S T R O U O J O N A T H A N A H U N T E R O S W A L D R S O B B I N O J O H N R C E R I C E D A N I E L E L A O R O N E B R Y A > - O. S C O F I E L O T M O M A S R O I A Z D A V I D R O O U O H T " J O H N R O U I L L O R Y M A R Y B . J O H N S O N K A T H L E E N F. K E T C H U M

flY HAND United States Department of the I n t e r i o r Minerals Management Service Gulf of Mexico OCS Region 1201 Elmwood Park Boulevard New Orleans, Louisiana 70123-2394

Re: Lease Numbers OCS G-3818, 55*25, 1618 and 5800

Gentlemen:

By C o l l a t e r a l Mortgage and C o l l a t e r a l Chattel Mortgage dated October 20, 1988 (the "Mortgage"), Dual Marine D r i l l i n g Company has mortgaged d r i l l i n g r i g s and r e l a t e d equipment t o be located on d r i l l i n g platforms w i t h i n the areas a f f e c t e d by the captioned leases. The Mortgage i s presently held by Wells Fargo Bank, National Association.

I n order t o place t h i r d p a r t i e s on notice as t o the execution and e f f i c a c y of the Mortgage, please place the enclosed f u l l y executed counterpart of said instrument w i t h the signed copy of t h i s l e t t e r attached, i n the f i l e maintained by your o f f i c e w i t h respect t o Federal OCS Lease No. OCS G-1618. Addi­t i o n a l l y , pl< ase place signed copies of t h i s l e t t e r i n the three f i l e s maintained by your o f f i c e w i t h respect t o Federal OCS Lease Nos. OCS G-3818, 5525 and 5800.

R E C E I V E D

OCT 25 i£S3

Minerals I knasenvn: : . 2 r v i C 2 THESE DOCUMENTS WILL BE FOUND .^:,n^ Z Environment <.» JAlS

AT MORTGAGE FILE M« (9 f\l

United States Department o f the I n t e r i o r LISKOW & Lewis Minerals Management Service Gulf of Mexico PAGE: 2 OCS Regior. October 25, 1988

For your referenr hs names and addresses of the interested parties are as f c i .owe:

Dual Marine D r i l l i n g Company 601 Poydras Street New Orleans, Louisiana 70130

Wells Fargo Bank, National Association 464 California Street San Francisco, California 94104

Our check i n payment of. your f i l i n g fees i s included with this l e t t e r . By your signature i n the space provided below, please acknowledge that f i l i n g has been accomplished as of this date as requested.

Very t r u l y yours,

LISKOW & LEWIS

George Denegre, Jr.

GDJr/sl

F i l i n g accomplished as requested:

UNITED STATES DEPARTMENT OF THE INTERIOR Minerals Management Service Gul f of Mexico OCS Region Few Orleans, Lou i s iana

By

i*r Orleans, Lou i s iana

October 25, 1988