Exhibit 99.3

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

The unaudited pro forma condensed combined statements of operations for the year ended December 31, 2016 combine the historical consolidated statements of operations of Patterson-UTI and SSE, giving effect to the merger as if it had occurred on January 1, 2016. The unaudited pro forma condensed combined balance sheet as of December 31, 2016 combines the historical condensed consolidated balance sheets of Patterson-UTI and SSE, giving effect to the merger as if it had occurred on December 31, 2016. The historical condensed consolidated financial statements have been adjusted in the unaudited pro forma condensed combined financial statements to give effect to pro forma events that are (1) directly attributable to the merger, (2) factually supportable, and (3) with respect to the statements of operations, expected to have a continuing impact on the combined company’s results. The unaudited pro forma condensed combined financial statements should be read in conjunction with the accompanying notes to the unaudited pro forma condensed combined financial statements. In addition, the unaudited pro forma condensed combined financial statements were based on and should be read in conjunction with the:

The unaudited pro forma condensed combined financial statements have been presented for informational purposes only. Such pro forma information is not necessarily indicative of what the combined company’s financial position or results of operations actually would have been had the merger been completed as of the dates indicated. In addition, the unaudited pro forma condensed combined financial statements do not purport to project the future financial position or operating results of the combined company.

The unaudited pro forma condensed combined financial statements have been prepared using the acquisition method of accounting under U.S. generally accepted accounting principles, and the regulations of the SEC. All material transactions between Patterson-UTI and SSE during the periods presented in the unaudited pro forma condensed combined financial statements have been eliminated. Patterson-UTI will be considered the acquirer in the merger for accounting purposes. The acquisition accounting is dependent upon certain valuations and other studies that have yet to commence or progress to a stage where there is sufficient information for a definitive measurement. Accordingly, the pro forma adjustments are preliminary and have been made solely for the purpose of providing these unaudited pro forma condensed combined financial statements. Differences between these preliminary estimates and the final acquisition accounting will occur, and these differences could have a material impact on the accompanying unaudited pro forma condensed combined financial statements and the combined company’s future results of operations and financial position.

The unaudited pro forma condensed combined financial statements do not reflect any cost savings, operating synergies or revenue enhancements that the combined company may achieve as a result of the merger, the costs to integrate the operations of Patterson-UTI and SSE, or the costs necessary to achieve any such cost savings, operating synergies or revenue enhancements.

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET

As of December 31, 2016

(in thousands)

The accompanying notes are an integral part of these unaudited pro forma condensed combined financial statements.

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

For the year ended December 31, 2016

(in thousands, except per share amounts)

The accompanying notes are an integral part of these unaudited pro forma condensed combined financial statements.

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

Note 1: Description of Transaction

On April 20, 2017, Seventy Seven Energy Inc., a Delaware corporation (“SSE”), became a wholly-owned subsidiary of Patterson-UTI Energy, Inc., a Delaware corporation (“Patterson-UTI”), as a result of the merger of Pyramid Merger Sub, Inc., a Delaware corporation and a direct, wholly-owned subsidiary of Patterson-UTI (“Merger Sub”), with and into SSE (the “Merger”). The Merger was effected pursuant to an Agreement and Plan of Merger, dated as of December 12, 2016, by and among Patterson-UTI, SSE, and Merger Sub (the “Merger Agreement”).

At the effective time of the Merger (the “Effective Time”) each issued and outstanding share of SSE common stock, par value $0.01 per share, other than shares owned by SSE and its wholly owned subsidiaries, shares owned by Patterson-UTI or Merger Sub and shares for which appraisal rights held by SSE stockholders have been perfected in compliance with Section 262 of the General Corporation Law of the State of Delaware, was converted into the right to receive 1.7851 shares (the “Exchange Ratio”) of newly issued Patterson-UTI common stock, par value $0.01 per share, rounded down to the nearest whole share. Instead of issuing fractional shares, each SSE stockholder who otherwise would have been entitled to receive a fraction of a share of Patterson-UTI common stock will receive cash (without interest) in lieu thereof, upon surrender of his or her shares of SSE common stock. Based on the number of shares of SSE common stock issued and outstanding immediately prior to the Effective Time, a total of 47,538,488 shares of Patterson-UTI common stock were issued to the former holders of SSE common stock pursuant to the Merger Agreement.

Immediately prior to the Effective Time, each SSE restricted stock unit award granted prior to December 12, 2016 that was outstanding as of immediately prior to the Effective Time (the “Incentive Awards”) immediately vested, any forfeiture restrictions applicable to such Incentive Awards immediately lapsed, the Incentive Awards were deemed settled, and each share of SSE common stock subject to such Incentive Awards was treated as a share of SSE common stock. At the Effective Time, each such share of SSE common stock that was distributed in settlement of the Incentive Awards entitled the holder thereof to receive the Merger Consideration. In addition, at the Effective Time, each SSE restricted stock unit award granted on or following December 12, 2016 was assumed by Patterson-UTI and converted into a restricted stock unit award, with the same terms and conditions as in effect immediately prior to the Effective Time, covering a number of shares of Patterson-UTI common stock equal to (i) the number of shares of SSE common stock subject to the award immediately prior to the Effective Time, multiplied by (ii) the Exchange Ratio, rounded to the nearest whole share.

Note 2: Basis of Presentation

The merger is reflected in the unaudited pro forma condensed combined financial statements pursuant to the acquisition method of accounting. Under the acquisition method, the total estimated purchase price as described in Note 3 was measured at the closing date of the merger using the market price of Patterson-UTI common stock at that time. The assets and liabilities of SSE have been measured at fair value based on various preliminary estimates using assumptions that Patterson-UTI management believes are reasonable utilizing information currently available. Use of different

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Continued)

estimates and assumptions could yield materially different results. There were limitations on the type of information that could be exchanged between Patterson-UTI and SSE until the merger was complete.

The process for estimating the fair values of identifiable intangible assets and certain tangible assets requires the use of significant estimates and assumptions, including estimating future cash flows. The excess of the purchase price over the estimated amounts of identifiable assets and liabilities of SSE as of the effective date of the merger will be allocated to goodwill. The purchase price allocation is subject to finalization of Patterson-UTI’s analysis of the fair value of the assets and liabilities of SSE as of the effective date of the merger. Accordingly, the purchase price allocation in the unaudited pro forma condensed combined financial statements is preliminary and will be adjusted upon completion of the final analysis of the fair value of the assets and liabilities of SSE. Such adjustments could be material.

In accordance with the SEC’s rules and regulations, the unaudited pro forma condensed combined financial statements do not reflect any cost savings, operating synergies or revenue enhancements that the combined company may achieve as a result of the merger, or the costs necessary to integrate the operations of Patterson-UTI and SSE or achieve any such cost savings, operating synergies or revenue enhancements.

Now that the merger is complete Patterson-UTI will perform a detailed review of SSE’s accounting policies. As a result of that review, Patterson-UTI may identify differences between the accounting policies of the two companies that, when conformed, could have a material impact on the consolidated financial statements of the combined company.

Further review of SSE’s financial statements may result in revisions to SSE’s historical presentation to conform to Patterson-UTI’s presentation.

Note 3: Consideration Transferred

The following is the consideration transferred to effect the acquisition of SSE.

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Continued)

Note 4: Estimate of Assets to be Acquired and Liabilities to be Assumed

The following is a preliminary estimate of the assets acquired and the liabilities assumed by Patterson-UTI, reconciled to the estimate of consideration expected to be transferred:

The following is a discussion of the adjustments made to SSE’s assets and liabilities in connection with the preparation of these unaudited pro forma condensed combined financial statements.

Fixed Assets: For purposes of these unaudited pro forma condensed combined financial statements, Patterson-UTI has estimated that the fair value adjustment to write-up fixed assets to fair value will be approximately $216 million. This estimate of fair value is preliminary and subject to change once Patterson-UTI has sufficient information as to the specific types, nature, age, condition and location of SSE’s fixed assets.

Intangible Assets and Liabilities: The fair value of identifiable intangible assets and liabilities was determined primarily using the “income approach,” which requires a forecast of all of the expected future cash flows as the primary input into either the discounted cash flow method, the relief-from-royalty method or the multi-period excess earnings method. Some of the more significant assumptions inherent in the development of

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Continued)

intangible asset values include: the amount and timing of projected future cash flows, the differential between contractual cash flows and market-driven cash flows, the discount rate selected to measure the risks inherent in the future cash flows, the assessment of the asset’s life cycle and various other factors. For purposes of these unaudited pro forma condensed combined financial statements, using certain high-level assumptions, the fair value of the identifiable intangible assets, their weighted average useful lives and the resulting amortization expense for the periods presented have been estimated as follows:

These preliminary estimates of fair value and estimated useful life will likely be different from the final acquisition accounting, and the difference could have a material impact on the accompanying unaudited pro forma condensed combined financial statements. A 10% change in the valuation of intangible assets would cause a corresponding increase or decrease in annual amortization expense of approximately $2.5 million, assuming an overall weighted average useful life of 1.7 years. Once Patterson-UTI reviews to the specifics of SSE’s intangible assets, additional insight will be gained that could impact: (i) the estimated total value assigned to intangible assets and (ii) the estimated weighted average useful life of each category of intangible assets. The estimated intangible asset values and related useful lives could be impacted by a variety of factors that may become known to Patterson-UTI only upon further review of additional information.

Deferred Tax Liabilities: As of the effective date of the merger, adjustments will be made for deferred taxes as part of the accounting for the acquisition. These adjustments reflect the estimated deferred tax liability impact of the acquisition on the pro forma condensed combined balance sheet, primarily relating to estimated fair value adjustments for acquired fixed assets and intangible assets. For purposes of these unaudited pro forma condensed combined financial statements, deferred taxes are provided at the 35% U.S. federal statutory income tax rate.

Goodwill: Goodwill is calculated as the difference between the acquisition date fair value of the consideration transferred and the values assigned to the identifiable assets acquired and liabilities assumed. The qualitative factors that are expected to lead to goodwill being recognized in the acquisition include access to new geographies, access to new product lines, increased scale of operations, supply chain and corporate efficiencies as well as infrastructure optimization. Goodwill is not amortized, but rather is subject to impairment testing on at least an annual basis.

Note 5: Adjustments to Unaudited Pro Forma Condensed Combined Balance Sheet

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Continued)

Establish deferred tax liabilities (assets) for the following (in thousands):

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PATTERSON-UTI ENERGY, INC. AND SUBSIDIARIES

NOTES TO PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS (Continued)

Note 6: Adjustments to Unaudited Pro Forma Condensed Combined Statements of Operations

The tax impact of the pro forma adjustments has been calculated as follows ($ in thousands):

(HH) Represents the adjusted weighted-average shares outstanding calculated as follows (in thousands):

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