|   | (Date of report)                  | February 17, 2012 |
|--------|-----------------------------------|-------------------|
|   | (Date of earliest event reported) | February 16, 2012 |

| Delaware                     |   | 1-12202      |   | 93-1120873          |
|------------------------------|--------|--------------|--------|---------------------|
| (State or other jurisdiction |   | (Commission  |   | (IRS Employer       |
| of incorporation)            |   | File Number) |   | Identification No.) |

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| Item 5.03 |   | Amendments to Articles of Incorporation or Bylaws; Changes in Fiscal Year                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-----------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  On February 16, 2012, the general partner of ONEOK Partners, L.P. (the “Partnership”) amended the Partnership’s Third Amended and Restated Agreement of Limited Partnership to modify the definition of “Conflicts Committee.”  The prior definition excluded from the Conflicts Committee directors of any Affiliate of the General Partner.  The revised definition excludes from the Conflicts Committee directors of any Affiliate of the General Partner, other than any member of the Partnership Group.  The foregoing is qualified in its entirety by reference to such amendment, a copy of which is filed herewith as Exhibit 3.1 to this Current Report, and is incorporated herein by reference. On February 16, 2012, ONEOK, Inc., in its capacity as the sole member of ONEOK Partners GP, L.L.C. (“ONEOK Partners GP”), the Partnership’s sole general partner, amended certain provisions of Section 4.12 of ONEOK Partners GP’s Third Amended and Restated Limited Liability Company Agreement, which relates to “interested directors.”  Among other things, the amendments clarify provisions relating to contracts or transactions involving an interested director and the circumstances in which a director will be deemed to have a financial interest in another company.  The foregoing is qualified in its entirety by reference to such amendment, a copy of which is filed herewith as Exhibit 10.1 to this Current Report, and is incorporated herein by reference.  |
| Item 9.01 |   | Financial Statements and Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|      |   |  Exhibits3.1      Amendment No. 3 to Third Amended and Restated Agreement of Limited Partnership of ONEOK Partners, L.P.10.1    Amendment No. 1 to Third Amended and Restated Limited Liability Company Agreement of ONEOK Partners GP, L.L.C.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |

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|   |              |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C.,General Partner             |
|--------|-------------------|--------|------------------------------------------------------------------------------------------|
|   |              |   |                                                                                     |
| Date:  | February 17, 2012 | By:    | /s/ Robert F. Martinovich                                                                |
|   |              |   | Robert F. MartinovichExecutive Vice President,Chief Financial Officer andTreasurer  |