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Goodwill and Intangible Assets
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets GOODWILL AND INTANGIBLE ASSETS
Goodwill

The carrying amount of goodwill, including changes therein, by reportable segment is below:
(in thousands)Production Chemical TechnologiesProduction & Automation TechnologiesDrilling TechnologiesReservoir Chemical TechnologiesTotal
December 31, 2019$— $809,977 $101,136 $— $911,113 
Acquisition (1)
349,821 — — 36,865 386,686 
Impairment (2)
— (616,271)— — (616,271)
Foreign currency translation1,236 (2,169)— (1)(934)
December 31, 2020351,057 191,537 101,136 36,864 680,594 
Acquisition (1)
2,500 13,893 — — 16,393 
Foreign currency translation3,081 37 — 2,762 5,880 
December 31, 2021$356,638 $205,467 $101,136 $39,626 $702,867 
_______________________
(1) See Note 3—Merger Transaction, Acquisitions, and Dispositions for additional information related to the acquisitions completed during June 2020, July 2021, and December 2021.
(2) Due to industry conditions resulting from the COVID-19 pandemic, we performed a quantitative impairment assessment of our goodwill as of March 31, 2020. Based on the results of our impairment test, we recognized impairment charges of $616.3 million.

We completed our annual impairment test as of October 1, 2021 for all reporting units and concluded that the goodwill related to our reporting units was not impaired.

Intangible Assets

During 2021, we recorded $10.2 million of acquired intangible assets as part of the Tomson Technologies LLC and Group 2 Technologies LLC acquisition. During 2020, we recorded $349.0 million of acquired intangible assets, including $59.0 million for favorable supply agreements as part of the Merger. See Note 3—Merger Transaction, Acquisitions, and Dispositions, for additional information.
The components of our definite- and indefinite-lived intangible assets were as follows:
December 31, 2021December 31, 2020
(in thousands)Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount		Gross
Carrying
Amount		Accumulated
Amortization		Net
Carrying
Amount
Definite-lived
intangible assets:
Customer relationships (1)
$593,242 $365,773 $227,469 $593,068 $321,298 $271,770 
Unpatented technologies142,540 37,264 105,276 133,700 19,958 113,742 
Favorable supply agreements (2)
59,000 30,546 28,454 59,000 11,308 47,692 
Trademarks (1)
59,873 32,270 27,603 59,881 27,565 32,316 
Patents38,735 31,080 7,655 38,635 29,289 9,346 
Other5,390 5,177 213 5,374 4,831 543 
898,780 502,110 396,670 889,658 414,249 475,409 
Indefinite-lived
intangible assets:
Trademarks3,600 — 3,600 3,600 — 3,600 
In-process research and development (3)
1,200 — 1,200 — — — 
4,800 — 4,800 3,600 — 3,600 
Total$903,580 $502,110 $401,470 $893,258 $414,249 $479,009 
_______________________
(1) During 2020, we recorded a long-lived asset impairment charge of $41.0 million, consisting of $40.4 million to customer relationships and $0.6 million to trademarks within Production & Automation Technologies.
(2) Favorable supply agreements were entered into as part of the Merger transaction. See Note 3—Merger Transaction, Acquisitions, and Dispositions for further information.
(3) In-process research and development was acquired as part of the Tomson Technologies LLC and Group 2 Technologies LLC acquisitions. See Note 3—Merger Transaction, Acquisitions, and Dispositions for further information.

Amortization expense related to our intangible assets was $87.4 million, $70.9 million, and $51.4 million for the years ended December 31, 2021, 2020, and 2019, respectively. Estimated future amortization expense related to intangible assets held as of December 31, 2021, is as follows:

(in thousands)Estimated Amortization
2022$87,476 
202362,150 
202448,800 
202537,674 
202637,316