|   | (Date of report)                  | April 10, 2012 |
|--------|-----------------------------------|----------------|
|   | (Date of earliest event reported) | April 9, 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 April 9, 2012, we announced plans to invest $1.5 billion to $1.8 billion between now and 2015 to build a 1,300-mile crude-oil pipeline with the capacity to transport 200,000 barrels per day.  The Bakken Crude Express Pipeline will transport light-sweet crude oil from the Bakken Shale in the Williston Basin in North Dakota to the Cushing, Oklahoma, crude-oil market hub.  A copy of the news release is attached as Exhibit 99.1 and is incorporated herein by reference. 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 Partners, L.P. dated April 9, 2012.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |

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|   |           |   | ONEOK Partners, L.P.By:  ONEOK Partners GP, L.L.C.,General Partner       |
|--------|----------------|--------|------------------------------------------------------------------------------------|
|   |           |   |                                                                               |
| Date:  | April 10, 2012 | By:    | /s/ Robert F. Martinovich                                                          |
|   |           |   | Robert F. MartinovichExecutive Vice President,Chief Financial Officer andTreasurer |