Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment

v3.22.0.1
Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment     
Property, plant and equipment include the following (in thousands):
December 31,
Useful Life 2021 2020
Pressure pumping equipment
3-5 years
 $ 220,414  $ 217,945 
Drilling rigs and related equipment
3-15 years
 111,478  113,146 
Machinery and equipment
7-20 years
 166,873  172,272 
Buildings(a)
15-39 years
 46,006  48,776 
Vehicles, trucks and trailers
5-10 years
 103,982  111,911 
Coil tubing equipment
4-10 years
 7,592  8,541 
Land N/A 13,417  13,417 
Land improvements
15 years or life of lease
 10,133  10,133 
Rail improvements
10-20 years
 13,793  13,793 
Other property and equipment(b)
3-12 years
 18,235  18,640 
711,923  728,574 
Deposits on equipment and equipment in process of assembly(c)
3,300  3,191 
715,223  731,765 
Less: accumulated depreciation(d)
538,637  480,503 
Total property, plant and equipment, net $ 176,586  $ 251,262 
a.Included in Buildings at each of December 31, 2021 and 2020 are costs of $7.6 million related to assets under operating leases.
b.Included in Other property and equipment at each of December 31, 2021 and 2020 are costs of $6.0 million related to assets under operating leases.
c.Deposits on equipment and equipment in process of assembly represents deposits placed with vendors for equipment that is in the process of assembly and purchased equipment that is being outfitted for its intended use. The equipment is not yet placed in service.
d.Includes accumulated depreciation of $6.6 million and $5.0 million at December 31, 2021 and 2020, respectively, related to assets under operating leases.

Proceeds from customers for horizontal and directional drilling services equipment, damaged or lost down-hole are reflected in revenue with the carrying value of the related equipment charged to cost of service revenues and are reported as cash inflows from investing activities in the statement of cash flows. For the years ended December 31, 2021, 2020 and 2019, proceeds from the sale of equipment damaged or lost down-hole were $0.3 million, $0.7 million, and a nominal amount, respectively, and gain on sales of equipment damaged or lost down-hole were $0.3 million, $0.7 million, and a nominal amount, respectively.

Proceeds from assets sold or disposed of as well as the carrying value of the related equipment are reflected in other, net on the consolidated statement of comprehensive loss. For the years ended December 31, 2021, 2020 and 2019, proceeds
from the sale of equipment were $11.2 million, $6.1 million and $3.2 million, respectively, and gains (losses) from the sale or disposal of equipment were $5.1 million, $0.7 million and ($0.1) million, respectively.

A summary of depreciation, depletion, amortization and accretion expense is shown below (in thousands):
Years Ended December 31,
2021 2020 2019
Depreciation expense $ 76,093  $ 93,332  $ 112,435 
Accretion and depletion expense 1,381  970  3,477 
Amortization expense 1,001  1,015  1,121 
Depreciation, depletion, amortization and accretion $ 78,475  $ 95,317  $ 117,033