|   | (Date of report)                  | February 21, 2012 |
|--------|-----------------------------------|-------------------|
|   | (Date of earliest event reported) | February 20, 2012 |

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

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| Item 2.02 |   | Results of Operations and Financial Condition                                                                                                                                                                                                                                 |
|-----------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  See discussion below under Item 7.01, Regulation FD Disclosure.                                                                                                                                                                                                    |
| Item 7.01 |   | Regulation FD Disclosure                                                                                                                                                                                                                                                      |
|      |   |  On February 20, 2012, we announced our results of operations for the year ended December 31, 2011, and updated our 2012 earnings and capital expenditure guidance.  The news release is furnished as Exhibit 99.1 and incorporated by reference herein.  |
| Item 9.01 |   | Financial Statements and Exhibits                                                                                                                                                                                                                                             |
|      |   |  Exhibits                                                                                                                                                                                                                                                                |
|      |   | 99.1    News release issued by ONEOK Partners, L.P. dated February 20, 2012.                                                                                                                                                                              |
|      |   |                                                                                                                                                                                                                                                                          |

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|   |              |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner |
|--------|-------------------|--------|-------------------------------------------------------------------------------|
|   |              |   |                                                                          |
| Date:  | February 21, 2012 | By:    | /s/ Robert F. Martinovich                                                     |
|   |              |   | Robert F. Martinovich                                                         |
|   |              |   | Executive Vice President,Chief Financial Officer andTreasurer            |