The accompanying condensed consolidated financial statements of ProPetro Holding Corp. and its subsidiaries (the "Company," "we," "us" or "our") have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission ("SEC") for interim financial information and do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America ("GAAP") for annual financial statements. Those adjustments (which consisted of normal recurring accruals) that are, in the opinion of management, necessary for a fair presentation of the results of the interim periods have been made. Results of operations for such interim periods are not necessarily indicative of the results of operations for a full year due to changes in market conditions and other factors. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2022, included in our Form 10-K filed with the SEC (our "Form 10-K").

The Company’s services are sold based upon contracts with customers. The Company recognizes revenue when it satisfies a performance obligation by transferring control over a product or service to a customer. The following is a description of the principal activities, aggregated into one reportable segment—"Completion Services," from which the Company generates its revenue and "All Other" category.

Hydraulic fracturing is an oil well completion technique, which is part of the overall well completion process. It is a well-stimulation technique intended to optimize hydrocarbon flow paths during the completion phase of shale wellbores. The process involves the injection of water, sand and chemicals under high pressure into shale formations. Our hydraulic fracturing contracts with our customers have one performance obligation, which is the contracted total stages, satisfied over time. We recognize revenue over time using a progress output, unit-of-work performed method, which is based on the agreed fixed transaction price and actual stages completed. We believe that recognizing revenue based on actual stages completed accurately depicts how our hydraulic fracturing services are transferred to our customers over time. In addition, certain of our hydraulic fracturing equipment may be entitled to reservation fee charges if a customer were to reserve committed hydraulic fracturing equipment. The Company recognizes revenue related to reservation fee charges on a daily basis as the performance obligations are met.

Acidizing, which is part of our hydraulic fracturing operating segment, involves a well-stimulation technique where acid or similar chemicals are injected under pressure into formations to form or expand fissures. Our acidizing contracts have one performance obligation, satisfied at a point-in-time, upon completion of the contracted service or sale of the acid or chemical when control is transferred to the customer. Jobs for these services are typically short term in nature, with most jobs completed in less than a day. We recognize acidizing revenue at a point-in-time, upon completion of the performance obligation.

Our cementing services use pressure pumping equipment to deliver a slurry of liquid cement that is pumped down a well between the casing and the borehole. Our cementing contracts have one performance obligation, satisfied at a point-in-time, upon completion of the contracted service when control is transferred to the customer. Jobs for these services are typically short term in nature, with most jobs completed in less than a day. We recognize cementing revenue at a point-in-time, upon completion of the performance obligation.

Wireline services (including pumpdown) are oil well completion techniques, which are part of the well completion process. Our wireline services utilize equipment with a drum of wireline to deploy perforating guns in the well to perforate the casing, cement, and formation. Once the well is perforated, the well can be fractured. Pumpdown utilizes pressure pumping equipment to pump water into the well to deploy perforating guns attached to wireline through the lateral section of a well. Our wireline contracts with our customers have one performance obligation, which is the contracted total stages, satisfied over time. We recognize revenue over time using a progress output, unit-of-work performed method, which is based on the agreed fixed transaction price and actual stages completed. We believe that recognizing revenue based on actual stages completed accurately depicts how our wireline services are transferred to our customers over time. In addition, certain of our wireline equipment is entitled to daily equipment charges while the equipment is on the customer’s locations. The Company recognizes revenue related to daily equipment charges on a daily basis as the performance obligations are met.

All Other— All Other consisted of coiled tubing services, which are complementary downhole well completion/remedial services. The performance obligation for these services had a fixed transaction price which was satisfied at a point-in-time upon completion of the service when control was transferred to the customer. Accordingly, we recognized revenue at a point-in-time, upon completion of the service and transfer of control to the customer. Effective September 1, 2022, we shut down our coiled tubing operations, and disposed of all our coiled tubing assets.

Our restricted cash relates to cash advances received from a customer in connection with our contract with the customer to provide electric hydraulic fracturing equipment and services. The restricted cash will be used to pay for contractually agreed upon expenditures. The cash advances from the customer will be credited towards the customer’s invoice as our revenue performance obligations are met over the contract period. Our restricted cash balances as of June 30, 2023 and December 31, 2022, were $12.2 million and $10.0 million, respectively.

The cash advances received represent contract liabilities in connection with the performance of certain completion services. The cash advance (contract liability) balances, which are included in accrued and other current liabilities in our condensed consolidated balance sheets, were $20.3 million and $10.0 million as of June 30, 2023 and December 31, 2022, respectively. During the six months ended June 30, 2023, we recognized revenue of $2.7 million from the cash advance amount outstanding at the beginning of the period.

Accounts receivables are stated at the amount billed and billable to customers. At June 30, 2023 and December 31, 2022, accrued revenue (unbilled receivable) included as part of our accounts receivable was $54.2 million and $51.9 million, respectively. At June 30, 2023, the transaction price allocated to the remaining performance obligation for our partially completed hydraulic fracturing and wireline operations was $83.5 million, which is expected to be completed and recognized as revenue within one month following the current period balance sheet date.

As of June 30, 2023, the Company had $0.2 million allowance for credit losses. Our allowance for credit losses is based on the evaluation of both our historic collection experience and the economic outlook for the oil and gas industry. We evaluated the historic loss experience on our accounts receivable and also considered separately customers with receivable balances that may be negatively impacted by current or future economic developments and market conditions. While the Company has not experienced significant credit losses in the past and has not yet seen material adverse changes to the payment patterns of its customers, the Company cannot predict with any certainty the degree to which the impacts of depressed economic activities, including the potential impact of periodically adjusted borrowing base limits, level of hedged production, or unforeseen well shut-downs may affect the ability of its customers to timely pay receivables when due. Accordingly, in future periods, the Company may revise its estimates of expected credit losses.

Certain reclassifications have been made to prior period amounts to conform to the current period presentation. These reclassifications had no effect on our balance sheet, operating and net income (loss) or cash flows from operating, investing and financing activities.

Current trends in hydraulic fracturing equipment operating conditions such as larger pads, changes to job design and increased pumping hours per day have resulted in shorter useful lives for certain critical components that are included in our property and equipment assets. These recent trends necessitated a review of useful lives of our critical components like fluid ends, power ends, hydraulic fracturing units and other components in the first quarter of 2023. We determined that the estimated useful life of fluid ends is now less than one year, resulting in our determination that costs associated with the replacement of these components will no longer be capitalized, but instead recorded in inventories and amortized to cost of services over their estimated useful life. We have also shortened the estimated useful lives of power ends to two years from five years and hydraulic fracturing units to ten years from fifteen years. This change in accounting estimates was made effective January 1, 2023 and accounted for prospectively. The net effect of this change for the three and six months ended June 30, 2023 was a $3.9 million and $7.3 million decrease in net income, or $0.03 and $0.06 per basic and diluted share, respectively.

Additionally, in connection with the review of our power ends estimated useful life, effective January 1, 2023, we are accelerating the depreciation of the remaining book value of power ends that prematurely fail. In 2022, we wrote off the remaining book value of prematurely failed and disposed of power ends to loss on disposal of assets. The amounts included in depreciation in connection with premature failure of power ends and other components during the three and six months ended June 30, 2023 were $11.8 million and $24.3 million, respectively. Furthermore, to conform to current period presentation, we have reclassified the amounts relating to premature failure of power ends previously included in loss on disposal of assets to depreciation expense for prior periods. The amounts reclassified were $9.5 million and $15.7 million, which relate to the three and six months ended June 30, 2022, respectively.


(in thousands)
	Three Months Ended June 30,				Six Months Ended June 30,
	2023		2022		2023		2022
Depreciation and amortization related to cost of services	$	51,390	$	40,873	$	100,664	$	78,794
Depreciation and amortization related to general and administrative expenses	1,499		96		3,023		179
Total depreciation and amortization	$	52,889	$	40,969	$	103,687	$	78,973