|   | (Date of report)                  | January 20, 2011 |
|--------|-----------------------------------|------------------|
|   | (Date of earliest event reported) | January 20, 2011 |

| 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 January 20, 2011, we announced plans to invest $260 million to $305 million between now and the end of 2014 for additional projects in the Bakken Shale in the Williston Basin.  A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. In accordance with General Instruction B.2 of Form 8-K, 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, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.  |
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| Item 8.01                               |   |  Other Events                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
|                                    |   |  On January 20, 2011, the board of directors of our general partner, ONEOK Partners GP, L.L.C., announced an increase in our quarterly cash distribution to $1.14 per unit from $1.13 per unit, effective for the fourth quarter 2010, resulting in an annualized cash distribution of $4.56 per unit.  The fourth-quarter distribution is payable on February 14, 2011, to unitholders of record as of January 31, 2011.  A copy of the news release is attached as exhibit 99.2 and is incorporated herein by reference.                                                                                                                                                                                                                                                       |
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| Item 9.01                               |   | Financial Statements and Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|                                    |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
|                                    |   | 99.1      News release issued by ONEOK Partners, L.P. dated January 20, 2011.99.2      News release issued by ONEOK Partners, L.P. dated January 20, 2011.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
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|   |             |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C., General Partner |
|--------|------------------|--------|-------------------------------------------------------------------------------|
|   |             |   |                                                                          |
| Date:  | January 20, 2011 | By:    | /s/ Curtis L. Dinan                                                           |
|   |             |   | Senior Vice President,Chief Financial Officer andTreasurer                    |
|   |             |   |                                                                          |