|     (Date      of report)                  |         February 9,      2009 |
|----------------------------------------------------------------|-----------------------------------------------------------------------|
|     (Date      of earliest event reported) |         February 5,      2009 |

| 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      February 5, 2009, we announced our net income guidance for 2009, and      affirmed our 2008 net income guidance. Our      2009 net income guidance is estimated to be in the range of $3.15 to      $3.75      per unit. Our 2009 distributable cash flow is expected to be in the range      of $490 million to $550      million. We      also affirmed our net income guidance for 2008 to the range of $5.95 to      $6.15      per unit and distributable cash flow to $625 million      to $655      million.   See      exhibit 99.1 for the reconciliation of net income to EBITDA and      reconciliation of EBITDA to distributable cash flow, which is incorporated      herein by reference.  |
| Item      9.01 |   | Financial Statements and      Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|           |   |  Exhibits                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|           |   | 99.1   News      release issued by ONEOK, Inc. and ONEOK Partners, L. P.      dated February 5,2009.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |

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|   |                  |   | ONEOK      Partners, L.P.By:  ONEOK      Partners GP, L.L.C., General Partner |
|--------|-----------------------|--------|-----------------------------------------------------------------------------------------|
|   |                  |   |                                                                                    |
| Date:  | February      9, 2009 | By:    | /s/ Curtis L. Dinan                                                                     |
|   |                  |   | Executive      Vice President -Chief      Financial Officer andTreasurer           |

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