|   | (Date of report)                  | May 3, 2011 |
|--------|-----------------------------------|-------------|
|   | (Date of earliest event reported) | May 3, 2011 |

| 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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|-----------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|            |   |  On May 3, 2011, we announced our results of operations for the quarter ended March 31, 2011.  The news release is furnished as Exhibit 99.1 and incorporated by reference herein. The information disclosed in this Item 2.02, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the Exchange Act), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act except as expressly set forth by specific reference in such filing.  |
| Item 9.01       |   | Financial Statements and Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|            |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|            |   | 99.1   News release issued by ONEOK Partners, L. P. dated May 3, 2011.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|            |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |

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|   |        |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner         |
|--------|-------------|--------|---------------------------------------------------------------------------------------|
|   |        |   |                                                                                  |
| Date:  | May 3, 2011 | By:    | /s/ Robert F. Martinovich                                                             |
|   |        |   | Robert F. MartinovichSenior Vice President,Chief Financial Officer andTreasurer  |