Exhibit 99.1








September 24, 2012Analyst Contact:Andrew Ziola918-588-7163Media Contact:Brad Borror918-588-7582





ONEOK Partners Announces Higher 2013 Financial Guidance


2013 Net Income Expected to Increase 10 Percent





Three-year Financial Forecasts Updated





TULSA, Okla. - Sept. 24, 2012 - ONEOK Partners, L.P. (NYSE: OKS) today announced that its 2013 net income is expected to increase 10 percent compared with the partnership's current 2012 earnings guidance that was updated July 31, 2012.





ONEOK Partners' 2013 net income is expected to be in the range of $935 million to $1.015 billion compared with its current 2012 earnings guidance range of $860 million to $910 million.





“Our 2013 earnings guidance reflects higher anticipated natural gas gathering and processing volumes and increased natural gas liquids gathering volumes as several projects from our $5.7 billion to $6.6 billion, four-year growth program are placed into service later this year and in 2013,” said John W. Gibson, chairman and chief executive officer of ONEOK Partners.





“Projected distribution and earnings growth are expected to be driven primarily by natural gas and natural gas liquids volume growth, not by higher projected commodity prices or wider projected price differentials,” Gibson added.





2013 earnings guidance includes a projected 2-cent-per-unit-per-quarter increase in unitholder distributions declared, while maintaining a minimum annual coverage ratio of 1.05 times distributable cash flow.  Actual unitholder distribution declarations are subject to ONEOK Partners board approval.





2013 earnings before interest, taxes, depreciation and amortization (EBITDA) are expected to be in the range of $1.36 billion to $1.48 billion, compared with the current 2012 earnings guidance midpoint of approximately $1.3 billion.





The midpoint for ONEOK Partners' current 2013 operating income guidance is $1.027 billion.  2013 earnings guidance reflects higher anticipated earnings from increased natural gas gathering and processing volumes in the natural gas gathering and processing segment and


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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 2


higher expected natural gas liquids (NGL) volumes gathered and fractionated in the natural gas liquids segment.  These increases are expected to be offset partially by lower expected NGL optimization margins, resulting from lower expected optimization volumes and narrower expected NGL price differentials in the natural gas liquids segment.





Preliminary estimates for the partnership's 2013 distributable cash flow (DCF) are expected to be in the range of $1.05 billion to $1.14 billion compared with its current 2012 guidance range of $975 million to $1.025 billion, a 10 percent increase.





ONEOK Partners expects EBITDA to increase by an average of 17 to 21 percent annually between 2012 and 2015, compared with 2012 earnings guidance.  The partnership also has estimated an average annual distribution increase of 10 to 15 percent between 2012 and 2015, which includes the planned 2-cent-per-unit-per-quarter increase in unitholder distributions declared in 2013.





Additional information is available in Exhibits A and B in the guidance tables on the ONEOK Partners website .





NATURAL GAS GATHERING AND PROCESSING SEGMENT





The midpoint of the natural gas gathering and processing segment's 2013 operating income guidance is $253 million, an increase of 15 percent compared with current 2012 guidance.





The 2013 earnings guidance reflects higher anticipated natural gas volumes gathered and processed as a result of new supply connections in the Bakken Shale in the Williston Basin in North Dakota, including volumes related to the new 100 million cubic feet per day (MMcf/d) natural gas processing plants, Stateline I, completed in the third quarter of 2012, and Stateline II, expected to be completed in the first quarter of 2013; and expected volume increases related to the Cana-Woodford Shale.  These increases are expected to be offset partially by lower natural gas gathering volumes in Kansas and the Powder River Basin in Wyoming due to decreased drilling activity in those regions and natural production declines.  Natural gas volumes processed in 2013 are expected to increase approximately 24 percent compared with 2012, while natural gas volumes gathered in 2013 are expected to increase approximately 16 percent.





Approximately 80 percent of the segment's expected 2013 equity natural gas production is hedged at an average price of $3.85 per million British thermal units (MMBtu); 2 percent of its expected 2013 equity natural gas liquids production is hedged at an average price of $2.51 per gallon; and 70 percent of its expected 2013 equity condensate production is hedged at an average price of $102.25 per barrel.


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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 3


The average unhedged prices used in ONEOK Partners' 2013 earnings guidance are $95.30 per barrel for New York Mercantile Exchange (NYMEX) crude oil, $4.05 per MMBtu for NYMEX natural gas and 76 cents per gallon for composite natural gas liquids.





For 2013, the partnership estimates that in its natural gas gathering and processing segment, a 1-cent per gallon change in the composite price of NGLs would change annual net margin by approximately $3.2 million; a $1.00 per barrel change in the price of crude oil would change annual net margin by approximately $1.3 million; and a 10-cent per MMBtu change in the price of natural gas would change annual net margin by approximately $2.3 million.  All of these sensitivities exclude the effects of hedging and assume normal operating conditions.





NATURAL GAS PIPELINES SEGMENT





The midpoint of the natural gas pipelines segment's 2013 operating income guidance is $144 million, an increase of 7 percent compared with current 2012 guidance.  2013 guidance assumes that 88 percent of transportation capacity and 100 percent of natural gas storage capacity is expected to be contracted for 2013.





NATURAL GAS LIQUIDS SEGMENT





The midpoint of the natural gas liquids segment's 2013 operating income guidance is $630 million, an increase of 6 percent compared with current 2012 guidance.





The 2013 earnings guidance reflects higher anticipated fee-based earnings from increased NGL volumes gathered and fractionated resulting from completed growth capital projects. These projects include the Bushton fractionator expansion expected to be completed in the fourth quarter of 2012; the Bakken NGL pipeline expected to be completed in the first quarter of 2013; and the MB-2 fractionator expected to be completed in mid-2013.  These increases are offset partially by lower expected optimization margins as a result of contracting at fee-based rates certain pipeline capacity previously used for optimization activities and narrower NGL price differentials.





2013 guidance assumes the Conway-to-Mont Belvieu OPIS average ethane in ethane/propane mix price differential to be 19 cents per gallon, compared with its current 2012 guidance of 28 cents per gallon for the second half of 2012.





OTHER





2013 other income is estimated to be higher than 2012 due to an expected increase in the allowance for equity funds used during construction (equity AFUDC), as a result of the previously announced growth projects of approximately $5.7 billion to $6.6 billion between 2011 and 2015.


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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 4


The midpoint for interest expense is expected to be approximately $222 million, reflecting increased borrowing costs from ONEOK Partners' $1.3 billion September 2012 debt issuance, offset partially by higher capitalized interest as a result of approximately $5.7 billion to $6.6 billion of growth projects between 2011 and 2015.





CAPITAL EXPENDITURES





For 2013, ONEOK Partners' capital expenditures are expected to be approximately $2.6 billion, comprised of approximately $2.5 billion in growth capital, related to the approximately $5.7 billion to $6.6 billion of growth projects between 2011 and 2015; and $119 million in maintenance capital.





ANNUAL INVESTOR CONFERENCE





ONEOK Partners will hold its annual investor conference on Tuesday, Sept. 25, 2012, in New York City, from 9 a.m. Eastern Daylight Time (8 a.m. Central Daylight Time) to noon Eastern Daylight Time (11 a.m. Central Daylight Time). The meeting also will be carried live on ONEOK Partners' website.





The webcast can be accessed on ONEOK Partners' website at http://www.oneokpartners.com/ .  A replay of the webcast will be available for 30 days after the conference.





LINK TO NEWS RELEASE WITH GUIDANCE TABLES





http://www.oneokpartners.com/~/media/ONEOKPartners/GuidanceDocs/2013/2013_OKS_Guidance_d4XP023.ashx





NON-GAAP (GENERALLY ACCEPTED ACCOUNTING PRINCIPLES) FINANCIAL MEASURES





ONEOK Partners has disclosed in this news release anticipated EBITDA and DCF levels that are non-GAAP financial measures.  EBITDA and DCF are used as measures of the partnership's financial performance.  EBITDA is defined as net income adjusted for interest expense, depreciation and amortization, income taxes, allowance for equity funds used during construction and certain other items.  DCF is defined as EBITDA, computed as described above, less interest expense, maintenance capital expenditures and equity earnings from investments, adjusted for distributions received and certain other items.





The partnership believes the non-GAAP financial measures described above are useful to investors because these measurements are used by many companies in its industry as an indicator


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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 5


of financial performance and are commonly employed by financial analysts and others to evaluate the financial performance of the partnership and to compare the financial performance of the partnership with the performance of other publicly traded partnerships within its industry.





EBITDA and DCF should not be considered alternatives to net income, net income attributable to ONEOK Partners, earnings per unit or any other measure of financial performance presented in accordance with GAAP.





These non-GAAP financial measures exclude some, but not all, items that affect net income. Additionally, these calculations may not be comparable with similarly titled measures of other companies.  Furthermore, these non-GAAP measures should not be viewed as indicative of the actual amount of cash that is available for distributions or that is planned to be distributed for a given period nor do they equate to available cash as defined in the partnership agreement.





ONEOK Partners, L.P. (pronounced ONE-OAK) (NYSE: OKS) is one of the largest publicly traded master 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 NGL supply in the Mid-Continent and Rocky Mountain regions with key market centers.  Its general partner is a wholly owned subsidiary of ONEOK, Inc. (NYSE: OKE), a diversified energy company, which owns 43.4 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.





For more information, visit the website at www.oneokpartners.com .





For the latest news about ONEOK Partners, follow us on Twitter @ONEOKPartners .





Some of the statements contained and incorporated in this news release are forward-looking statements within the meaning of Section 27A of the Securities Act, as amended, and Section 21E of the Exchange Act, as amended.  The forward-looking statements relate to our anticipated financial performance (including projected operating income, net income, capital expenditures, cash flow and projected levels of dividends and distributions), liquidity, management's plans and objectives for our growth projects and other future operations (including plans to construct additional natural gas and natural gas liquids pipelines and processing facilities), our business prospects, the outcome of regulatory and legal proceedings, market conditions and other matters.  We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.  The following discussion is intended to identify important factors that could cause future outcomes to differ materially from those set forth in the forward-looking statements.





Forward-looking statements include the items identified in the preceding paragraph, the information concerning possible or assumed future results of our operations and other statements contained or incorporated in this news release identified by words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “should,” “goal,” “forecast,” “guidance,” “could,” “may,” “continue,” “might,” “potential,” “scheduled” and other words and terms of similar meaning.





One should not place undue reliance on forward-looking statements, which are applicable only as of the date of this news release.  Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by forward-looking statements.  Those factors may affect our operations, markets, products, services and prices.  In addition to any assumptions and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual results to differ materially from those contemplated in any forward-looking statement include, among others, the following:


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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 6


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|• | the effects of weather and other natural phenomena, including climate change, on our operations, demand for our services and energy prices;

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|• | competition from other United States and foreign energy suppliers and transporters, as well as alternative forms of energy, including, but not limited to, solar power, wind power, geothermal energy and biofuels such as ethanol and biodiesel;

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|• | the capital intensive nature of our businesses;

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|• | the profitability of assets or businesses acquired or constructed by us;

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|• | our ability to make cost-saving changes in operations;

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|• | risks of marketing, trading and hedging activities, including the risks of changes in energy prices or the financial condition of our counterparties;

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|• | the uncertainty of estimates, including accruals and costs of environmental remediation;

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|• | the timing and extent of changes in energy commodity prices;

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|• | the effects of changes in governmental policies and regulatory actions, including changes with respect to income and other taxes, pipeline safety, environmental compliance, climate change initiatives and authorized rates of recovery of natural gas and natural gas transportation costs;

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|• | the impact on drilling and production by factors beyond our control, including the demand for natural gas and crude oil; producers' desire and ability to obtain necessary permits; reserve performance; and capacity constraints on the pipelines that transport crude oil, natural gas and NGLs from producing areas and our facilities;

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|• | difficulties or delays experienced by trucks or pipelines in delivering products to or from our terminals or pipelines;

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|• | changes in demand for the use of natural gas because of market conditions caused by concerns about global warming;

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|• | conflicts of interest between us, our general partner, ONEOK Partners GP, and related parties of ONEOK Partners GP;

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|• | the impact of unforeseen changes in interest rates, equity markets, inflation rates, economic recession and other external factors over which we have no control;

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|• | our indebtedness could make us vulnerable to general adverse economic and industry conditions, limit our ability to borrow additional funds and/or place us at competitive disadvantages compared with our competitors that have less debt or have other adverse consequences;

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|• | actions by rating agencies concerning the credit ratings of us or the parent of our general partner;

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|• | the results of administrative proceedings and litigation, regulatory actions, rule changes and receipt of expected clearances involving the Oklahoma Corporation Commission (OCC), Kansas Corporation Commission (KCC), Texas regulatory authorities or any other local, state or federal regulatory body, including the Federal Energy Regulatory Commission (FERC), the National Transportation Safety Board (NTSB), the Pipeline and Hazardous Materials Safety Administration (PHMSA), the Environmental Protection Agency (EPA) and the Commodity Futures Trading Commission (CFTC);

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|• | our ability to access capital at competitive rates or on terms acceptable to us;

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|• | risks associated with adequate supply to our gathering, processing, fractionation and pipeline facilities, including production declines that outpace new drilling;

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|• | the risk that material weaknesses or significant deficiencies in our internal control over financial reporting could emerge or that minor problems could become significant;

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|• | the impact and outcome of pending and future litigation;

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|• | the ability to market pipeline capacity on favorable terms, including the effects of:

- future demand for and prices of natural gas, NGLs and crude oil;


- competitive conditions in the overall energy market;


- availability of supplies of Canadian and United States natural gas and crude oil; and


- availability of additional storage capacity;


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|• | performance of contractual obligations by our customers, service providers, contractors and shippers;

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|• | the timely receipt of approval by applicable governmental entities for construction and operation of our pipeline and other projects and required regulatory clearances;

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|• | our ability to acquire all necessary permits, consents and other approvals in a timely manner, to promptly obtain all necessary materials and supplies required for construction, and to construct gathering, processing, storage, fractionation and transportation facilities without labor or contractor problems;

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|• | the mechanical integrity of facilities operated;

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|• | demand for our services in the proximity of our facilities;

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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
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|• | our ability to control operating costs;

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|• | acts of nature, sabotage, terrorism or other similar acts that cause damage to our facilities or our suppliers' or shippers' facilities;

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|• | economic climate and growth in the geographic areas in which we do business;

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|• | the risk of a prolonged slowdown in growth or decline in the United States or international economies, including liquidity risks in United States or foreign credit markets;

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|• | the impact of recently issued and future accounting updates and other changes in accounting policies;

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|• | the possibility of future terrorist attacks or the possibility or occurrence of an outbreak of, or changes in, hostilities or changes in the political conditions in the Middle East and elsewhere;

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|• | the risk of increased costs for insurance premiums, security or other items as a consequence of terrorist attacks;

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|• | risks associated with pending or possible acquisitions and dispositions, including our ability to finance or integrate any such acquisitions and any regulatory delay or conditions imposed by regulatory bodies in connection with any such acquisitions and dispositions;

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|• | the impact of uncontracted capacity in our assets being greater or less than expected;

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|• | the ability to recover operating costs and amounts equivalent to income taxes, costs of property, plant and equipment and regulatory assets in our state and FERC-regulated rates;

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|• | the composition and quality of the natural gas and NGLs we gather and process in our plants and transport on our pipelines;

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|• | the efficiency of our plants in processing natural gas and extracting and fractionating NGLs;

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|• | the impact of potential impairment charges;

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|• | the risk inherent in the use of information systems in our respective businesses, implementation of new software and hardware, and the impact on the timeliness of information for financial reporting;

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|• | our ability to control construction costs and completion schedules of our pipelines and other projects; and

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|• | the risk factors listed in the reports we have filed and may file with the Securities and Exchange Commission (SEC), which are incorporated by reference.




These factors are not necessarily all of the important factors that could cause actual results to differ materially from those expressed in any of our forward-looking statements.  Other factors could also have material adverse effects on our future results.  These and other risks are described in greater detail in Part I, Item 1A, Risk Factors, in the Annual Report.  All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors.  Other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise.





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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 8





ONEOK Partners, L.P. and SubsidiariesExhibit AEARNINGS GUIDANCE*20132012GuidanceGuidanceChange(Millions of dollars)Operating incomeNatural Gas Gathering and Processing$253$220$33Natural Gas Pipelines1441359Natural Gas Liquids63059337Operating income1,02794879Equity earnings from investments1381299Other income (expense)462026Interest expense(222)(198)(24)Income before income taxes98989990Income taxes(14)(14)—Net income attributable to ONEOK Partners, L.P.$975$885$90Capital expendituresNatural Gas Gathering and Processing$691$676$15Natural Gas Pipelines44413Natural Gas Liquids1,8631,328535Other6—6Total capital expenditures$2,604$2,045$559Growth$2,485$1,937$548Maintenance11910811Total capital expenditures$2,604$2,045$559*Amounts shown are midpoints of ranges provided.








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ONEOK Partners Announces Higher 2013 Financial Guidance
 2013 Net Income Expected to Increase 10 Percent
 Three-year Financial Forecasts Updated
 
 September 24, 2012
 
 Page 9





ONEOK Partners, L.P. and SubsidiariesExhibit BEARNINGS GUIDANCE*20132012GuidanceGuidanceChange(Millions of dollars)Reconciliation of Net Income to EBITDA and Distributable Cash FlowNet income$975$885$90Interest expense22219824Depreciation and amortization25720948Income taxes1414—Allowance for equity funds used during construction and other(48)(17)(31)EBITDA$1,420$1,289$131Interest expense(222)(198)(24)Maintenance capital(119)(108)(11)Equity earnings from investments(138)(129)(9)Distributions received from unconsolidated affiliates1631567Other(9)(10)1Distributable cash flow$1,095$1,000$95*Amounts shown are midpoints of ranges provided.