ONEOK and ONEOK Partners Second-Quarter 2006 Earnings Conference Call and Webcast Scheduled

TULSA, Okla., July 10 /PRNewswire-FirstCall/ -- ONEOK, Inc. and ONEOK Partners, L.P. will release their second-quarter 2006 earnings on Aug. 2, 2006.

A joint conference call will be held the following day on Aug. 3, 2006, at 11 a.m. Eastern Daylight Time (10 a.m. Central Daylight Time). The call will also be carried live on ONEOK's and ONEOK Partners' Web sites.

ONEOK's and ONEOK Partners' senior management teams will participate in the call and webcast.

What: ONEOK, Inc.'s and ONEOK Partners, L.P.'s second-quarter 2006 earnings conference call and webcast When: 11 a.m. Eastern, Aug. 3, 2006 10 a.m. Central Where: 1) Phone conference call 866-836-4700, passcode 890065 2) Log on to the Web at http://www.oneok.com/ 3) Log on to the Web at http://www.oneokpartners.com/

If you are unable to participate in the conference call or the webcast, the replay will be available on ONEOK's Web site http://www.oneok.com/ and ONEOK Partners' Web site http://www.oneokpartners.com/ for 30 days. A recording will be available by phone for seven days. The playback call may be accessed at 866-837-8032, pass code 890065.

ONEOK, Inc. is a diversified energy company. We are the general partner and own 45.7 percent of ONEOK Partners, L.P., one of the largest publicly traded limited partnerships, which is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the mid-continent with key market centers. ONEOK is among the largest natural gas distributors in the United States, serving more than 2 million customers in Oklahoma, Kansas and Texas. Our energy services operation focuses primarily on marketing natural gas and related services throughout the U.S. ONEOK is a Fortune 500 company.

ONEOK Partners, L.P. is one of the largest publicly traded limited partnerships, and is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the mid-continent with key market centers. Its general partner is ONEOK, Inc. , a diversified energy company, which owns 45.7 percent of the overall partnership interest. ONEOK is one of the largest natural gas distributors in the United States, and its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S. OKE-FV

For more information, visit the Web sites at http://www.oneokpartners.com/ or http://www.oneok.com/ .

ONEOK, Inc. ONEOK Partners, L.P. Analyst Contact: Dan Harrison Analyst Contact: Ellen Konsdorf 918-588-7950 877-208-7318 Media Contact: Nancy Owens Media Contact: Beth Jensen 918-588-7570 402-492-3400