
(in thousands)	Estimated Useful Lives	September 30, 2022		September 30, 2021
Drilling services equipment	4 - 15 years	$	6,369,888	$	6,229,011
Tubulars	4 years	569,496		573,900
Real estate properties	10 - 45 years	45,557		43,302
Other	2 - 23 years	422,479		459,741
Construction in progress1		70,119		47,587
		7,477,539		7,353,541
Accumulated depreciation		(4,516,730)		(4,226,254)
Property, plant and equipment, net		$	2,960,809	$	3,127,287

Assets held-for-sale		$	4,333	$	71,453

(1)Included in construction in progress are costs for projects in progress to upgrade or refurbish certain rigs in our existing fleet. Additionally, we include other advances for capital maintenance purchase-orders that are open/in process. As these various projects are completed, the costs are then classified to their appropriate useful life category.

Consistent with our policy, we evaluate our drilling rigs and related equipment for impairment whenever events or changes in circumstances indicate the carrying value of these assets may exceed the estimated undiscounted future net cash flows. Our evaluation, among other things, includes a review of external market factors and an assessment on the future marketability of specific rigs’ asset group.

During the second quarter of fiscal year 2020, several significant economic events took place that severely impacted the current demand on drilling services, including the significant drop in crude oil prices caused by OPEC+'s price war coupled with the decrease in the demand due to the COVID-19 pandemic. To maintain a competitive edge in a challenging market, the Company’s management introduced a new strategy focused on operating various types of highly capable upgraded rigs and phasing out the older, less capable fleet. This resulted in grouping the super-spec rigs of our legacy Domestic FlexRig® 3 asset group and our FlexRig® 5 asset group creating a new "Domestic super-spec FlexRig®" asset group, while combining the legacy Domestic conventional asset group, FlexRig® 4 asset group and FlexRig® 3 non-super-spec rigs into one asset group (Domestic non-super-spec asset group). Given the current and projected low utilization for our Domestic non-super-spec asset group and all International asset groups, we considered these economic factors to be indicators that these asset groups may be impaired.

As a result of these indicators, we performed impairment testing at March 31, 2020 on each of our Domestic non super-spec and International conventional, FlexRig® 3, and FlexRig® 4 asset groups, which had an aggregate net book value of $605.8 million. We concluded that the net book value of each asset group was not recoverable through estimated undiscounted cash flows and recorded a non-cash impairment charge of $441.4 million in the Consolidated Statement of Operations for the fiscal year ended September 30, 2020. Of the $441.4 million total impairment charge recorded, $292.4 million and $149.0 million was recorded in the North America Solutions and International Solutions segments, respectively. No further impairments were recognized in fiscal year 2020. Impairment was measured as the amount by which the net book value of each asset group exceeded its fair value as of the assessment date.

The most significant assumptions used in our undiscounted cash flow model include timing on awards of future drilling contracts, drilling rig utilization, estimated remaining useful life, and net proceeds received upon future sale/disposition. These assumptions are classified as Level 3 inputs by ASC Topic 820 Fair Value Measurement and Disclosures as they are based upon unobservable inputs and primarily rely on management assumptions and forecasts.

As of March 31, 2020, the Company also recorded an additional non-cash impairment charge related to in-progress drilling equipment and rotational inventory of $44.9 million and $38.6 million, respectively, which had aggregate book values of $68.4 million and $38.6 million, respectively, in the Consolidated Statement of Operations for the fiscal year ended September 30, 2020. Of the $83.5 million total impairment charge recorded for in-progress drilling equipment and rotational inventory, $75.8 million and $7.7 million was recorded in the North America Solutions and International Solutions segments, respectively.

In March 2021, the Company's leadership continued the execution of the current strategy, which was initially introduced in 2019, focusing on operating various types of highly capable upgraded rigs and phasing out the older, less capable fleet. As a result, the Company developed a plan to sell 71 Domestic non-super-spec rigs, all within our North America Solutions segment, the majority of which were previously decommissioned, written down and/or held as capital spares. The book values of those assets were written down to $13.5 million, which represented their fair value less estimated cost to sell as of the assessment date, and were reclassified as held-for-sale in the second and third quarters of fiscal year 2021. As a result, we recognized a non-cash impairment charge of $56.4 million during the fiscal year ended September 30, 2021 in the Consolidated Statement of Operations. During the fiscal year ended September 30, 2022 and September 30, 2021, we completed the sale of assets with a net book value of $2.6 million and $6.5 million, respectively, that were originally classified as held-for-sale during the second and third quarters of fiscal year 2021.

During September 2021, the Company agreed to sell eight FlexRig land rigs with an aggregate net book value of $55.6 million to ADNOC Drilling Company P.J.S.C. ("ADNOC Drilling") for $86.5 million. Two of the eight rigs were already located in the U.A.E where ADNOC Drilling is domiciled with the remaining six rigs to be shipped from the United States. We received the $86.5 million in cash consideration in advance of delivering the rigs. As part of the sales agreement, the rigs were delivered and commissioned in stages over a twelve-month period subject to acceptance upon successful completion of final inspection on customary terms and conditions. No rigs were delivered to ADNOC Drilling as of September 30, 2021 and, therefore, the total cash proceeds of $86.5 million was recorded in Accrued Liabilities within our Consolidated Balance Sheets as of September 30, 2021.

As of September 30, 2022, ADNOC Drilling accepted delivery of all eight rigs resulting in a gain of $3.1 million, after $27.8 million of selling costs, during the fiscal year ended September 30, 2022. Upon final acceptance of delivery, these rigs were removed from assets classified as held-for-sale as of September 30, 2022. The gain is recorded in Other (Gain) Loss on Sale of Assets within our Consolidated Statement of Operations for the fiscal year ended September 30, 2022. We paid approximately $21.6 million in cash charges attributable to selling costs for the eight rigs during fiscal year 2022.

During the fiscal year ended September 30, 2021, we formalized a plan to sell assets related to two of our lower margin service offerings, trucking and casing running services, which contributed approximately 2.8 percent to our consolidated revenue during fiscal year 2021, all within our North America Solutions segment. The combined net book values of these assets of $23.2 million were written down to their combined fair value less estimated cost to sell of $8.8 million, and were reclassified as held-for-sale on the Consolidated Balance Sheets as of September 30, 2021. As a result, we recognized a non-cash impairment charge of $14.4 million in the Consolidated Statements of Operations during the year ended September 30, 2021. During the fiscal year ended September 30, 2022, we closed on the sale of these assets in two separate transactions. The sale of our trucking services assets was completed on November 3, 2021 while the sale of our casing running services assets was completed on November 15, 2021 for total consideration less costs to sell of $6.0 million, in addition to the possibility of future earnout proceeds, resulting in a loss of $3.4 million during the fiscal year ended September 30, 2022. Losses related to the sale of these assets are recorded in Other (Gain) Loss on Sale of Assets within our Consolidated Statements of Operations. During the year ended September 30, 2022 we recognized $1.1 million in earnout proceeds associated with the sale of our trucking services assets within Other (Gain) Loss on Sale of Assets on the Consolidated Statements of Operations.

During the first quarter of fiscal year 2022, we identified two partial rig substructures that met the asset held-for-sale criteria and were reclassified as Assets Held-for-Sale on our Consolidated Balance Sheets. The combined net book value of the rig substructures of $2.0 million were written down to their estimated scrap value of $0.1 million, resulting in a non-cash impairment charge of $1.9 million within our North America Solutions segment and recorded in the Consolidated Statement of Operations for fiscal year ended September 30, 2022. During the second quarter of fiscal year 2022, we completed the sale of these assets, resulting in no gain or loss as a result of the sale.

During the first quarter of fiscal year 2022, we identified two international FlexRig® drilling rigs located in Colombia that met the asset held-for-sale criteria and were reclassified as Assets Held-for-Sale on our Consolidated Balance Sheets. In conjunction with establishing a plan to sell the two international FlexRig® drilling rigs, we recognized a non-cash impairment charge of $2.5 million within our International Solutions segment and recorded in the Consolidated Statement of Operations during the fiscal year ended September 30, 2022, as the rigs aggregate net book value of $3.4 million exceeded the fair value of the rigs less estimated cost to sell of $0.9 million. During the second quarter of fiscal year ended September 30, 2022, we completed the sale of the two international FlexRig® drilling rigs for total consideration of $0.9 million, resulting in no gain or loss as a result of the sale.

The significant assumptions utilized in the valuations of held-for-sale were based on our intended method of disposal, historical sales of similar assets, and market quotes and are classified as Level 2 and Level 3 inputs by ASC Topic 820, Fair Value Measurement and Disclosures. Although we believe the assumptions used in our analysis are reasonable and appropriate, different assumptions and estimates could materially impact the analysis and our resulting conclusion.

Prior to the fiscal year ended September 30, 2022, Gain on Reimbursement of Drilling Equipment and Other (Gain) Loss on Sale of Assets was presented in the aggregate as Gain (Loss) on Sale of Assets on our Consolidated Statements of Operations. To conform with the current fiscal year presentation, we reclassified amounts previously presented in the Gain (Loss) on Sale of Assets during the years ended September 30, 2021 and 2020, as presented below.

We recognized a gain of $29.4 million, $12.3 million, $27.0 million in fiscal years 2022, 2021 and 2020, respectively, related to customer reimbursement for the current replacement value of lost or damaged drill pipe. Gains related to these asset sales are recorded in Gains on Reimbursement of Drilling Equipment within our Consolidated Statements of Operations.

Fiscal Year 2022 During the first quarter of fiscal year 2022, we closed on the sale of our trucking and casing running assets resulting in a loss of $3.4 million, as mentioned above. We also recognized a gain of $1.1 million in earnout proceeds associated with the sale of our trucking services assets during the fiscal year ended September 30, 2022.

Fiscal Year 2021 During the fiscal year ended September 30, 2021, we closed on the sale of an offshore platform rig within our Offshore Gulf of Mexico operating segment for total consideration of $12.0 million with an aggregate net book value of $2.8 million, resulting in a gain of $9.2 million. Additionally during the fiscal year ended September 30, 2021, we sold excess drilling equipment and spares, which resulted in a loss of $31.2 million and we also sold assets previously classified as held-for-sale, which resulted in a $3.1 million gain.