Common use of SCHEDULE OF EXCHANGES OF SECURITIES3 Clause in Contracts

SCHEDULE OF EXCHANGES OF SECURITIES3. The following exchanges, redemptions or repurchases of a part of this Global Security have been made: Principal Amount of this Global Security Following Such Decrease Date of Exchange (or Increase) Authorized Signatory of Trustee or Security Custodian Amount of Decrease in Principal Amount of this Global Security Amount of Increase in Principal Amount of this Global Security 3 This schedule should be included only if the Security is a Global Security. EXHIBIT B [FORM OF FACE OF 2013 NOTE] UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.4 4 These paragraphs should be included only if the Security is a Global Security. XTO ENERGY INC. 5.75% SENIOR NOTE DUE 2013 No. $ CUSIP No. XTO Energy Inc., a Delaware corporation (herein called the “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to or registered assigns the principal sum of Dollars on December 15, 2013 or such greater or lesser amount as is indicated on the Schedule of Exchanges of Securities attached hereto5, at the office or agency of the Company referred to below, and to pay interest thereon, commencing on December 15, 2008 and continuing semiannually thereafter, on June 15 and December 15 of each year, from August 7, 2008 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, at the rate of 5.75% per annum, until the principal hereof is paid or duly provided for, and (to the extent lawful) to pay on demand, interest on any overdue interest at the rate borne by the Securities from the date on which such overdue interest becomes payable to the date payment of such interest has been made or duly provided for. In the circumstances indicated in Section 4.2 of the Indenture, the Company may elect to pay Special Interest on this Security, at the rate stated therein, and all references in this Security to interest accrued or payable as of any date shall include any Special Interest accrued or payable as of such date, as provided in such Section 4.2. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 or December 1 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. Interest on the Securities of this series shall be computed on the basis of a 360-day year comprised of twelve 30-day months. Payment of the principal of, premium, if any, and interest on this Security will be made at the office or agency of the Company maintained for that purpose in the City of New York, and at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided however, that payment of interest may be made at the option of the Company (i) by check mailed to Holders at their respective addresses as shown in 5 This clause should be included only if the Security is a Global Security. the Security Register or (ii) with respect to any Holder owning Securities in the principal amount of $500,000 or more, by wire transfer to an account maintained by the Holder located in the United States, as specified in a written notice to the Trustee (received prior to the relevant record date) by any such Holder requesting payment by wire transfer and specifying the account to which transfer is requested. Notwithstanding the foregoing, so long as this Security is registered in the name of a Depositary or its nominee, all payments hereon shall be made by wire transfer of immediately available funds to the account of such Depositary or its nominee. The Holder must surrender this Security to a Paying Agent to collect payment of principal. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the certificate of authentication hereon has been duly executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose.

SCHEDULE OF EXCHANGES OF SECURITIES3. The following exchanges, exchanges or redemptions or repurchases of a part of this Global Security have been made: Principal Amount of this Global Security Following Such Decrease Date of Exchange (or Increase) Authorized Signatory of Trustee or Security Custodian Transaction Amount of Decrease in Principal Amount of this Global Security Amount of Increase in Principal Amount of this the Global Security 3 This schedule should be included only if the Security is a Global Security. EXHIBIT ANNEX B GLOBAL SECURITY [FORM OF FACE OF 2013 NOTESECURITY] UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. [THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.4 DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY TRUST COMPANY, OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN ARTICLE ONE OF THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.]4 4 These paragraphs should be included only if the Security is a Global Security. XTO ENERGY [FORM OF FACE OF SECURITY] DIAMOND OFFSHORE DRILLING, INC. 5.754.875% SENIOR NOTE DUE 2013 Senior Notes due 2043 Issue Date: Principal Amount: $ CUSIP: 00000XXX0 Registered: No. $ CUSIP No. XTO Energy ISIN: US25271CAN20 Diamond Offshore Drilling, Inc., a Delaware corporation (herein called the “Company,” ”, which term includes any successor Person corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns assigns, the principal sum of Dollars DOLLARS ($ ) on December 15November 1, 2013 2043, [or such greater or lesser amount as is indicated on in the Schedule of Exchanges of Securities attached hereto5, at on the office or agency other side of the Company referred to below, this 2043 Note]5 and to pay interest thereonthereon from November 5, commencing on December 15, 2008 and continuing semiannually thereafter, on June 15 and December 15 of each year, from August 7, 2008 2013 or from the most recent Interest Payment Date date to which interest has been paid or duly provided for, semiannually on May 1 and November 1 in each year (each, an “Interest Payment Date”), commencing May 1, 2014, at the rate of 5.754.875% per annum, until the principal hereof is paid or duly provided for, and (to the extent lawful) to pay on demand, interest on any overdue interest at the rate borne by the Securities from the date on which such overdue interest becomes payable to the date payment of such interest has been made or duly provided foravailable for payment. In the circumstances indicated in Section 4.2 of the Indenture, the Company may elect to pay Special Interest on this Security, at these 2043 Notes shall be calculated on the rate stated therein, and all references in this Security to interest accrued or payable as basis of any date shall include any Special Interest accrued or payable as a 360-day year consisting of such date, as provided in such Section 4.2twelve 30-day months. The interest so payable, payable and punctually paid or duly provided for, for on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security 2043 Note (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 April 15 or December 1 October 15 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest which is payable, but is not so punctually paid or duly provided for for, on any Interest Payment Date shall forthwith cease to be payable to the registered Holder hereof on such the relevant Regular Record Date by virtue of having been such Holder, and may be paid to the Person in whose name this 5 To be included only if the Security is a Global Security. 2043 Note (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the TrusteeCompany, notice whereof shall be given to the Holders of Securities of this series 2043 Notes not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series 2043 Notes may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said such Indenture. Interest on the Securities of this series shall be computed on the basis of a 360-day year comprised of twelve 30-day months. Payment of the principal of, premiumof and interest, if any, and interest on this Security 2043 Note will be made at the office or agency of the Company maintained for that purpose in the The City of New York, and at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided provided, however, that payment of interest may be made at the option of the Company (i) Company, payment of interest, if any, may be made by check mailed to Holders at their respective addresses the address of the Person entitled thereto as shown such address shall appear in 5 This clause should be included only if the Security is a Global Security. the Security Register or (ii) with respect to any Holder owning Securities in the principal amount of $500,000 or more, by wire transfer to an account maintained by the Holder located in the United States, as specified in a written notice to the Trustee (received prior to the relevant record date) by any such Holder requesting payment by wire transfer and specifying the account to which transfer is requested. Notwithstanding the foregoing, so long as this Security is registered in the name of a Depositary or its nominee, all payments hereon shall be made by wire transfer of immediately available funds to the account of such Depositary or its nominee. The Holder must surrender this Security to a Paying Agent to collect payment of principalRegister. Reference is hereby made to the further provisions of this Security 2043 Note set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the certificate of authentication hereon has been duly executed by the Trustee referred to on the reverse hereof by manual signature, this Security 2043 Note shall not be entitled to any benefit under the Indenture, Indenture or be valid or obligatory for any purpose.

SCHEDULE OF EXCHANGES OF SECURITIES3. The following exchanges, redemptions or repurchases of a part of this Global Security have been made: Principal Amount of this Global Security Following Such Decrease Date of Exchange (or Increase) Authorized Signatory of Trustee or Security Custodian Amount of Decrease in Principal Amount of this Global Security Amount of Increase in Principal Amount of this Global Security 3 This schedule should be included only if the Security is a Global Security. EXHIBIT B [FORM OF FACE OF 2013 2017 NOTE] UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.4 4 These paragraphs should be included only if the Security is a Global Security. XTO ENERGY INC. 5.756.25% SENIOR NOTE DUE 2013 2017 No. $ _____ $___________ CUSIP NoXx. XTO 00000X XX0 XXX Energy Inc., a Delaware corporation (herein called the “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to or registered assigns the principal sum of Dollars on December 15August 1, 2013 2017 or such greater or lesser amount as is indicated on the Schedule of Exchanges of Securities attached hereto5, at the office or agency of the Company referred to below, and to pay interest thereon, commencing on December 15February 1, 2008 and continuing semiannually thereafter, on June 15 February 1 and December 15 August 1 of each year, from August 7July 19, 2008 2007 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, at the rate of 5.756.25% per annum, until the principal hereof is paid or duly provided for, and (to the extent lawful) to pay on demand, interest on any overdue interest at the rate borne by the Securities from the date on which such overdue interest becomes payable to the date payment of such interest has been made or duly provided for. In the circumstances indicated in Section 4.2 of the Indenture, the Company may elect to pay Special Interest on this Security, at the rate stated therein, and all references in this Security to interest accrued or payable as of any date shall include any Special Interest accrued or payable as of such date, as provided in such Section 4.2. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 January 15 or December 1 July 15 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. Interest on the Securities of this series shall be computed on the basis of a 360-day year comprised of twelve 30-day months. Payment of the principal of, premium, if any, and interest on this Security will be made at the office or agency of the Company maintained for that purpose in the City of New York, and at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided however, that payment of interest may be made at the 5 This clause should be included only if the Security is a Global Security. option of the Company (i) by check mailed to Holders at their respective addresses as shown in 5 This clause should be included only if the Security is a Global Security. the Security Register or (ii) with respect to any Holder owning Securities in the principal amount of $500,000 or more, by wire transfer to an account maintained by the Holder located in the United States, as specified in a written notice to the Trustee (received prior to the relevant record date) by any such Holder requesting payment by wire transfer and specifying the account to which transfer is requested. Notwithstanding the foregoing, so long as this Security is registered in the name of a Depositary or its nominee, all payments hereon shall be made by wire transfer of immediately available funds to the account of such Depositary or its nominee. The Holder must surrender this Security to a Paying Agent to collect payment of principal. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the certificate of authentication hereon has been duly executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose.

SCHEDULE OF EXCHANGES OF SECURITIES3. The following exchanges, redemptions or repurchases of a part of this Global Security have been made: Principal Amount of this Global Security Following Such Decrease Date of Exchange (or Increase) Authorized Signatory of Trustee or Security Custodian Amount of Decrease in Principal Amount of this Global Security Amount of Increase in Principal Amount of this Global Security 3 This schedule should be included only if the Security is a Global Security. EXHIBIT B [FORM OF FACE OF 2013 2036 NOTE] [UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.4 DEPOSITARY.]4 4 These paragraphs should be included only if the Security is a Global Security. XTO ENERGY INC. 5.756.10% SENIOR NOTE DUE 2013 2036 No. $ CUSIP No. No.98385X AJ 5 XTO Energy Inc., a Delaware corporation (herein called the “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to or registered assigns the principal sum of Dollars on December 15April 1, 2013 2036 [or such greater or lesser amount as is indicated on the Schedule of Exchanges of Securities attached hereto5hereto]5, at the office or agency of the Company referred to below, and to pay interest thereon, commencing on December 15October 1, 2008 2006 and continuing semiannually thereafter, on June 15 April 1 and December 15 October 1 of each year, from August 7March 30, 2008 2006 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, at the rate of 5.756.10% per annum, until the principal hereof is paid or duly provided for, and (to the extent lawful) to pay on demand, interest on any overdue interest at the rate borne by the Securities from the date on which such overdue interest becomes payable to the date payment of such interest has been made or duly provided for. In the circumstances indicated in Section 4.2 of the Indenture, the Company may elect to pay Special Interest on this Security, at the rate stated therein, and all references in this Security to interest accrued or payable as of any date shall include any Special Interest accrued or payable as of such date, as provided in such Section 4.2. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 March 15 or December 1 September 15 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. Interest on the Securities of this series shall be computed on the basis of a 360-day year comprised of twelve 30-day months. Payment of the principal of, premium, if any, and interest on this Security will be made at the office or agency of the Company maintained for that purpose in the City of New York, and at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided however, that payment of interest may be made at the option of the Company (i) by check mailed to Holders at their respective addresses as shown in 5 This clause should be included only if the Security is a Global Security. the Security Register or (ii) with respect to any Holder owning Securities in the principal amount of $500,000 or more, by wire transfer to an account maintained by the Holder located in the United States, as specified in a written notice to the Trustee (received prior to the relevant record date) by any such Holder requesting payment by wire transfer and specifying the account to 5 This clause should be included only if the Security is a Global Security. which transfer is requested. Notwithstanding the foregoing, so long as this Security is registered in the name of a Depositary or its nominee, all payments hereon shall be made by wire transfer of immediately available funds to the account of such Depositary or its nominee. The Holder must surrender this Security to a Paying Agent to collect payment of principal. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the certificate of authentication hereon has been duly executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose.

SCHEDULE OF EXCHANGES OF SECURITIES3. The following exchanges, redemptions or repurchases of a part of this Global Security have been made: Principal Amount of this Global Security Following Such Decrease Date of Exchange (or Increase) Authorized Signatory of Trustee or Security Custodian Amount of Decrease in Principal Amount of this Global Security Amount of Increase in Principal Amount of this Global Security 3 This schedule should be included only if the Security is a Global Security. EXHIBIT B [FORM OF FACE OF 2013 2018 NOTE] UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY IS EXCHANGEABLE FOR SECURITIES REGISTERED IN THE NAME OF A PERSON OTHER THAN THE DEPOSITARY OR ITS NOMINEE ONLY IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR SECURITIES IN DEFINITIVE FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.4 4 These paragraphs should be included only if the Security is a Global Security. XTO ENERGY INC. 5.755.500% SENIOR NOTE DUE 2013 2018 No. $ CUSIP NoXx. XTO 00000X XX0 XXX Energy Inc., a Delaware corporation (herein called the “Company,” which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to or registered assigns the principal sum of Dollars on December June 15, 2013 2018 or such greater or lesser amount as is indicated on the Schedule of Exchanges of Securities attached hereto5, at the office or agency of the Company referred to below, and to pay interest thereon, commencing on December June 15, 2008 and continuing semiannually thereafter, on June 15 and December 15 of each year, from August 7April 18, 2008 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, at the rate of 5.755.500% per annum, until the principal hereof is paid or duly provided for, and (to the extent lawful) to pay on demand, interest on any overdue interest at the rate borne by the Securities from the date on which such overdue interest becomes payable to the date payment of such interest has been made or duly provided for. In the circumstances indicated in Section 4.2 of the Indenture, the Company may elect to pay Special Interest on this Security, at the rate stated therein, and all references in this Security to interest accrued or payable as of any date shall include any Special Interest accrued or payable as of such date, as provided in such Section 4.2. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in such Indenture, be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the June 1 or December 1 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and may be paid to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this series not less than 10 days prior to such Special Record Date, or may be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in said Indenture. Interest on the Securities of this series shall be computed on the basis of a 360-day year comprised of twelve 30-day months. Payment of the principal of, premium, if any, and interest on this Security will be made at the office or agency of the Company maintained for that purpose in the City of New York, and at such other office or agency of the Company as may be maintained for such purpose, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided however, that payment of interest may be made at the option of the Company (i) by check mailed to Holders at their respective addresses as shown in 5 This clause should be included only if the Security is a Global Security. the Security Register or (ii) with respect to any Holder owning Securities in the principal amount of $500,000 or more, by wire transfer to an account maintained by the Holder located in the United States, as specified in a written notice to the Trustee (received prior to the relevant record date) by any such Holder requesting payment by wire transfer and specifying the account to which transfer is requested. Notwithstanding the foregoing, so long as this Security is registered in the name of a Depositary or its nominee, all payments hereon shall be made by wire transfer of immediately available funds to the account of such Depositary or its nominee. The Holder must surrender this Security to a Paying Agent to collect payment of principal. Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place. Unless the certificate of authentication hereon has been duly executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture, or be valid or obligatory for any purpose.