Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Registration Statement on Form S-3of Nine Energy Service, Inc.of our report dated March 7, 2019relating to the financial statements, which appears in Nine Energy Service, Inc.’s Annual Report on Form10-K for the year ended December 31, 2018. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Houston, Texas
September 20, 2019
