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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Sep. 30, 2021
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment | At September 30, 2021 and 2020, the cost and accumulated depreciation for real estate properties were as follows:
| September 30,
(in thousands) | 2021 |  | 2020
Real estate properties | $ | 43,302 |  |  | $ | 43,389 |
Accumulated depreciation | (28,846) |  |  | (27,588) |
| $ | 14,456 |  |  | $ | 15,801 |
Property, plant and equipment as of September 30, 2021 and 2020 consisted of the following:
(in thousands) | Estimated Useful Lives |  | September 30, 2021 |  | September 30, 2020
Drilling services equipment | 4 - 15 years |  | $ | 6,229,011 |  |  | 7,313,234 |
Tubulars | 4 years |  | 573,900 |  |  | 615,281 |
Real estate properties | 10 - 45 years |  | 43,302 |  |  | 43,389 |
Other | 2 - 23 years |  | 459,741 |  |  | 464,704 |
Construction in progress 1 |  |  | 47,587 |  |  | 49,592 |
|  |  | 7,353,541 |  |  | 8,486,200 |
Accumulated depreciation |  |  | (4,226,254) |  |  | (4,839,859) |
Property, plant and equipment, net |  |  | $ | 3,127,287 |  |  | $ | 3,646,341 |
Assets held-for-sale |  |  | $ | 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 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.
Schedule of Assets Held-for-Sale | The following table summarizes the balance (in thousands) of our assets held-for-sale at the dates indicated below:
Balance at September 30, 2020 | $ | — |
Plus: |
Asset additions | 77,929 |
Less: |
Sale of assets held-for-sale | (6,476) |
Balance at September 30, 2021 | $ | 71,453 |

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- Definition Tabular disclosure of long lived assets held for sale. Disclosure may include the description of the facts and circumstances leading to the expected disposal, manner and timing of disposal, the carrying value of the assets held for sale, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230 + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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