|   | (Date of report)                  | May 1, 2012      |
|--------|-----------------------------------|------------------|
|   | (Date of earliest event reported) | May 1, 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 May 1, 2012, we announced our results of operations for the quarter ended March 31, 2012, and reaffirmed our 2012 earnings 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 May 1, 2012.                                                                                                                                                                   |
|      |   |                                                                                                                                                                                                                                                              |

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|   |             |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner |
|--------|------------------|--------|-------------------------------------------------------------------------------|
|   |             |   |                                                                          |
| Date:  | May 1, 2012 | By:    | /s/ Robert F. Martinovich                                                     |
|   |             |   | Robert F. Martinovich                                                         |
|   |             |   | Executive Vice President,Chief Financial Officer andTreasurer            |