|   | (Date of report)                  | September 14, 2012 |
|--------|-----------------------------------|--------------------|
|   | (Date of earliest event reported) | September 12, 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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|      |   |  On September 12, 2012, we and ONEOK, Inc. announced we will hold our annual investor conference on Tuesday, September 25, 2012, in New York City, from 9:00 a.m. Eastern Daylight Time (8:00 a.m. Central Daylight Time) to noon Eastern Daylight Time (11:00 a.m. Central Daylight Time).  The meeting will also be carried live on our website.  A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. The webcast can be accessed on ONEOK’s and ONEOK Partners’ websites at www.oneok.com and www.oneokpartners.com.  A replay of the webcast will be available for 30 days after the conference. 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 September 12, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|      |   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |

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|   |               |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C.,General Partner             |
|--------|--------------------|--------|------------------------------------------------------------------------------------------|
|   |               |   |                                                                                     |
| Date:  | September 14, 2012 | By:    | /s/ Robert F. Martinovich                                                                |
|   |               |   | Robert F. MartinovichExecutive Vice President,Chief Financial Officer andTreasurer  |