|   | (Date of report)                  | February 28, 2012 |
|--------|-----------------------------------|-------------------|
|   | (Date of earliest event reported) | February 28, 2012 |

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

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| Item 7.01 |   | Regulation FD Disclosure                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
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|      |   |  On February 28, 2012, we and ONEOK, Inc. (ONEOK) announced we will participate in the UBS Natural Gas, Electric Power and MLP Conference in Dallas on Wednesday, February 29, 2012.  A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. Pierce H. Norton, executive vice president and chief operating officer of ONEOK and ONEOK Partners GP. L.L.C., our general partner, and Robert F. Martinovich, executive vice president, chief financial officer and treasurer of ONEOK and ONEOK Partners GP, L.L.C., will be conducting a series of one-on-one meetings with members of the investment community. The materials utilized at the conference will be accessible on the ONEOK and ONEOK Partners websites, www.oneok.com and www.oneokpartners.com, on Wednesday, February 29, 2012, beginning at 7 a.m. Central Standard Time. The information disclosed in this Item 7.01, 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, Inc. and ONEOK Partners, L.P. dated February 28, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |

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|   |              |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner            |
|--------|-------------------|--------|------------------------------------------------------------------------------------------|
|   |              |   |                                                                                     |
| Date:  | February 28, 2012 | By:    | /s/ Robert F. Martinovich                                                                |
|   |              |   | Robert F. MartinovichExecutive Vice President,Chief Financial Officer andTreasurer  |