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PROPERTY, PLANT AND EQUIPMENT (Tables)
12 Months Ended
Sep. 30, 2023
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment as of September 30, 2023 and 2022 consisted of the following:
(in thousands)Estimated Useful LivesSeptember 30, 2023September 30, 2022
Drilling services equipment
4 - 15 years
$6,396,612 $6,369,888 
Tubulars
4 years
564,032 569,496 
Real estate properties
10 - 45 years
47,313 45,557 
Other
2 - 23 years
443,366 422,479 
Construction in progress1
97,374 70,119 
7,548,697 7,477,539 
Accumulated depreciation(4,627,002)(4,516,730)
Property, plant and equipment, net$2,921,695 $2,960,809 
Assets held-for-sale$645 $4,333 
(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.
Schedule of Assets Held-for-Sale
The following table is a summary of the changes in the balance (in thousands) of our assets held-for-sale at the dates indicated below:
Balance at September 30, 2021
$71,453 
Plus:
Asset additions2,580 
Less:
Sale of assets held-for-sale(67,592)
Reclassification to assets held and used(2,108)
Balance at September 30, 2022
4,333 
Plus:
Asset additions1,177 
Less:
Sale of assets held-for-sale(2,132)
Impairment Expense(2,733)
Balance at September 30, 2023
$645