Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment

v3.10.0.1
Property, Plant and Equipment
6 Months Ended
Jun. 30, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment     
Property, plant and equipment include the following (in thousands):
 
 
 
June 30,
 
December 31,
 
Useful Life
 
2018
 
2017
Pressure pumping equipment
3-5 years
 
$
199,333

 
$
190,211

Drilling rigs and related equipment
3-15 years
 
137,075

 
132,260

Machinery and equipment(a)
7-20 years
 
140,308

 
97,569

Buildings
15-39 years
 
47,593

 
45,992

Vehicles, trucks and trailers(b)
5-10 years
 
91,680

 
54,055

Coil tubing equipment
4-10 years
 
28,068

 
28,053

Land
N/A
 
14,183

 
11,317

Land improvements
15 years or life of lease
 
9,614

 
9,614

Rail improvements
10-20 years
 
13,101

 
5,540

Other property and equipment
3-12 years
 
15,006

 
12,687

 
 
 
695,961

 
587,298

Deposits on equipment and equipment in process of assembly
 
 
33,349

 
20,348

 
 
 
729,310

 
607,646

Less: accumulated depreciation(c)
 
 
305,995

 
256,629

Property, plant and equipment, net
 
 
$
423,315

 
$
351,017


a.
Included in machinery and equipment are assets under capital leases totaling $1.8 million and $1.8 million, respectively, at June 30, 2018 and December 31, 2017.
b.
Included in vehicles, trucks and trailers are assets under capital leases totaling $3.8 million and $1.0 million, respectively, at June 30, 2018 and December 31, 2017.
c.
Accumulated depreciation for assets under capital leases totaled $0.9 million and $0.8 million, respectively, at June 30, 2018 and December 31, 2017.

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 six months ended June 30, 2018 and 2017, proceeds from the sale of equipment damaged or lost down-hole were $0.6 million and $0.3 million, respectively, and gains on sales of equipment damaged or lost down-hole were $0.5 million and $0.2 million, respectively.

A summary of depreciation, depletion, amortization and accretion expense is below (in thousands):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Depreciation expense(a)
$
27,058

 
$
17,229

 
$
51,456

 
$
32,196

Depletion expense
1,340

 
382

 
1,427

 
384

Amortization expense
2,382

 
2,268

 
4,790

 
4,536

Accretion expense
15

 
14

 
30

 
14

Depreciation, depletion, amortization and accretion
$
30,795

 
$
19,893

 
$
57,703

 
$
37,130

a.
Includes depreciation expense for assets under capital leases totaling $0.4 million and $0.2 million, respectively, for the six months ended June 30, 2018 and 2017.

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.