SECOND AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

CHAMPIONX CORPORATION

(Pursuant to Sections 228, 242 and 245 of the General Corporation Law of the State of Delaware)

ChampionX Corporation (the “Corporation”), a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), does hereby certify as follows:

(1) The name of the Corporation is ChampionX Corporation. The Corporation was originally incorporated under the name Wellsite Corporation and later under the name Apergy Corporation. The original Certificate of Incorporation of the Corporation was filed with the office of the Secretary of State of the State of Delaware on October 10, 2017 (the “Certificate of Incorporation”), and a Certificate of Amendment thereto was filed with the office of the Secretary of State of the State of Delaware on February 2, 2018. The Amended and Restated Certificate of Incorporation of Apergy Corporation was filed May 8, 2018, and a Certificate of Amendment thereto was filed, amending the name of the Corporation, with the office of the Secretary of State of the State of Delaware on June 3, 2020.

(2) This Second Amended and Restated Certificate of Incorporation was duly adopted by the Board of Directors of the Corporation (the “Board of Directors”) in accordance with Sections 242 and 245 of the DGCL and by the sole stockholder of the Corporation in accordance with Section 228 of the DGCL.

(3) This Second Amended and Restated Certificate of Incorporation restates and integrates and amends the Certificate of Incorporation of the Corporation in its entirety.

(4) The text of the Certificate of Incorporation is amended and restated in its entirety as follows:

FIRST: The name of the Corporation is ChampionX Corporation.

SECOND: The address of the registered office of the Corporation in the State of Delaware is 1209 Orange Street, in the City of Wilmington, County of New Castle, 19801. The name of its registered agent at that address is The Corporation Trust Company.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the DGCL.

FOURTH: (a) Authorized Capital Stock. The total number of shares of stock which the Corporation shall have authority to issue is 2,750,000,000 shares of capital stock, consisting of (i) 2,500,000,000 shares of common stock, par value $0.01 per share (the “Common Stock”), and (ii) 250,000,000 shares of preferred stock, par value $0.01 per share (the “Preferred Stock”).

(b) Common Stock. The powers, preferences and rights, and the qualifications, limitations and restrictions, of the Common Stock are as follows:

(1) Voting. Each stockholder represented at a meeting of stockholders shall be entitled to cast one vote in person or by proxy for each share of Common Stock entitled to vote thereat held by such stockholder.

(2) No Cumulative Voting. The holders of shares of Common Stock shall not have cumulative voting rights.

(3) Dividends; Stock Splits. Subject to the rights of the holders of Preferred Stock, and subject to any other provisions of this Second Amended and Restated Certificate of Incorporation, as it may be amended from time to time, the holders of shares of the Common Stock shall be entitled to receive ratably such

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dividends and other distributions in cash, stock or property of the Corporation when, as and if declared thereon by the Board of Directors from time to time out of assets or funds of the Corporation legally available therefor.

(4) Liquidation; Dissolution; Winding-Up. In the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Corporation, after payment or provision for payment of the debts and other liabilities of the Corporation, and subject to the rights of the holders of shares of Preferred Stock in respect thereof, the holders of shares of Common Stock shall be entitled to receive all of the remaining assets of the Corporation available for distribution to its stockholders, ratably in proportion to the number of shares of Common Stock held by them.

(5) No Preemptive or Subscription Rights. No holder of shares of the Common Stock shall be entitled to preemptive or subscription rights.

(c) Preferred Stock. The Board of Directors is hereby expressly authorized to provide for the issuance of all or any shares of the Preferred Stock in one or more classes or series, and to fix for each such class or series such voting powers, full or limited, or no voting powers, and such designations, preferences and relative, participating, optional or other special rights and such qualifications, limitations or restrictions thereof, as shall be stated and expressed in the resolution or resolutions adopted by the Board of Directors providing for the issuance of such class or series, including, without limitation, the authority to provide that any such class or series may be (i) subject to redemption at such time or times and at such price or prices; (ii) entitled to receive dividends (which may be cumulative or non-cumulative) at such rates, on such conditions, and at such times, and payable in preference to, or in such relation to, the dividends payable on any other class or classes or any other series; (iii) entitled to such rights upon the dissolution of, or upon any distribution of the assets of, the Corporation; or (iv) convertible into, or exchangeable for, shares of any other class or classes of stock, or of any other series of the same or any other class or classes of stock, of the Corporation at such price or prices or at such rates of exchange and with such adjustments; all as may be stated in such resolution or resolutions.

(d) Power to Sell and Purchase Shares. Subject to the requirements of applicable law, the Corporation shall have the power to issue and sell all or any part of any shares of any class of stock herein or hereafter authorized to such persons, and for such consideration, as the Board of Directors shall from time to time, in its discretion, determine, whether or not greater consideration could be received upon the issue or sale of the same number of shares of another class, and as otherwise permitted by law. Subject to the requirements of applicable law, the Corporation shall have the power to purchase any shares of any class of stock herein or hereafter authorized from such persons, and for such consideration, as the Board of Directors shall from time to time, in its discretion, determine, whether or not less consideration could be paid upon the purchase of the same number of shares of another class, and as otherwise permitted by law.

FIFTH: The following provisions are inserted for the management of the business and the conduct of the affairs of the Corporation, and for further definition, limitation and regulation of the powers of the Corporation and of its directors and stockholders:

(a) The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors.

(b) The Board of Directors shall consist of not less than three nor more than 15 members, the exact number of which shall be fixed from time to time exclusively pursuant to a resolution adopted by the affirmative vote of a majority of the entire Board of Directors, and subject to the rights of the holders of the Preferred Stock, if any, the exact number may be increased or decreased (but not to less than three or more than 15).

(c) Except as provided in Paragraph (c) of this Article FIFTH, each director shall be elected by a vote of the majority of the votes cast at each meeting of stockholders for the election of directors at which a quorum is present; provided, that each director shall be elected by the vote of the plurality of the votes cast at each such meeting of stockholders for which (x) the Secretary of the Corporation receives notice that one or more stockholders has proposed to nominate one or more persons for election or re-election to the Board of Directors,

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which notice purports to be in compliance with the advance notice requirements for stockholder nominations set forth in the Corporation’s By-Laws (as may be amended from time to time), irrespective of whether the Board of Directors at any time determines that any such notice is not in compliance with such requirements, and (y) such nomination or nominations have not been formally and irrevocably withdrawn by such stockholder(s) on or prior to the date that is 14 days in advance of the date that the Corporation gives notice of the meeting to the stockholders. For purposes of this Article FIFTH, a majority of the votes cast means that the number of shares voted “for” a director must exceed the number of shares voted “against” that director. A director shall hold office until the annual meeting of stockholders for the year in which such person’s term expires and until such person’s successor shall be elected and shall qualify, subject, however, to prior death, resignation, retirement, disqualification or removal from office. Directors need not be stockholders. Elections of directors need not be by written ballot unless the Corporation’s By-Laws so provide.

(d) Subject to the terms of any one or more classes or series of the Preferred Stock, any vacancy on the Board of Directors that results from an increase in the number of directors or the death, resignation, retirement, disqualification, removal from office or other cause shall be filled exclusively by a majority of the Board of Directors then in office, in their sole discretion, even if less than a quorum, or by a sole remaining director, in such person’s sole discretion. Any director appointed to fill a vacancy on the Corporation’s Board of Directors will be appointed for a term expiring at the next annual meeting of stockholders, and until such person’s successor has been elected and qualified. Except as otherwise required by applicable law and subject to the rights, if any, of the holders of shares of the Preferred Stock then outstanding, any or all of the directors of the Corporation may be removed from office at any time with or without cause, and by the affirmative vote of the holders of at least a majority of the voting power of the shares of capital stock of the Corporation entitled to vote in the election of directors. Notwithstanding the foregoing, whenever the holders of any one or more classes or series of the Preferred Stock issued by the Corporation shall have the right, voting separately by class or series, to elect directors at an annual or special meeting of stockholders, the election, term of office, filling of vacancies and other features of such directorships shall be governed by the terms of this Second Amended and Restated Certificate of Incorporation and the resolution or resolutions adopted by the Board of Directors providing for the issuance of such class or series, and such directors so elected shall not be divided into classes pursuant to this Article FIFTH unless expressly provided by such terms.

(e) In addition to the powers and authority hereinbefore or by statute expressly conferred upon them, the directors are hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the DGCL, this Second Amended and Restated Certificate of Incorporation, and any By-Laws adopted by the stockholders; provided, however, that no By-Laws hereafter adopted by the stockholders shall invalidate any prior act of the directors which would have been valid if such By-Laws had not been adopted.

SIXTH: No director or officer shall be personally liable to the Corporation or any of its stockholders for monetary damages for breach of fiduciary duty as a director or officer, except to the extent such exemption from liability or limitation thereof is not permitted under the DGCL as the same exists or may hereafter be amended. If the DGCL is amended hereafter to authorize the further elimination or limitation of the liability of directors or officers, then the liability of a director or officer of the Corporation shall be eliminated or limited to the fullest extent authorized by the DGCL, as so amended. Any repeal or modification of this Article SIXTH shall not adversely affect any right or protection of a director or officer of the Corporation existing at the time of such repeal or modification with respect to acts or omissions occurring prior to such repeal or modification.

SEVENTH: The Corporation shall indemnify its directors and officers to the fullest extent authorized or permitted by law, as now or hereafter in effect, and such right to indemnification shall continue as to a person who has ceased to be a director or officer of the Corporation and shall inure to the benefit of such person’s heirs, executors and personal and legal representatives; provided, however, that, except for proceedings to enforce rights to indemnification, the Corporation shall not be obligated to indemnify any director or officer (or such person’s heirs, executors or personal or legal representatives) in connection with a proceeding (or part thereof) initiated by such

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person unless such proceeding (or part thereof) was authorized or consented to by the Board of Directors. The right to indemnification conferred by this Article SEVENTH shall include the right to be paid by the Corporation the expenses incurred in defending or otherwise participating in any proceeding in advance of its final disposition, subject to receipt of an undertaking by or on behalf of such director or officer to repay such amount if it shall ultimately be determined that such person is not entitled to be indemnified by the Corporation.

The Corporation may, to the extent authorized from time to time by the Board of Directors, provide rights to indemnification and to the advancement of expenses to employees and agents of the Corporation, or to those persons serving at the Corporation’s request as a director, officer, employee or agent of, or in a fiduciary capacity with respect to, another corporation, partnership, joint venture, trust or other enterprise, similar to those conferred in this Article SEVENTH to directors and officers of the Corporation.

The Corporation may purchase and maintain insurance on behalf of any person who is or was a director or officer of the Corporation, or is or was a director, officer or employee of the Corporation serving at the request of the Corporation as a director, officer, employee or agent of, or in a fiduciary capacity with respect to, another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against such person and incurred by such person in any such capacity, or arising out of such person’s status as such, whether or not the Corporation would have the power or the obligation to indemnify such person against such liability under the provisions of this Article SEVENTH.

The rights to indemnification and to the advancement of expenses conferred in this Article SEVENTH shall not be exclusive of any other right which any person may have or hereafter acquire under this Second Amended and Restated Certificate of Incorporation, the By-Laws of the Corporation, any statute, agreement, vote of stockholders or disinterested directors or otherwise.

Any repeal or modification of any provision of this Article SEVENTH shall not adversely affect any rights to indemnification and to the advancement of expenses of a director or officer of the Corporation existing at the time of such repeal or modification with respect to any acts or omissions occurring prior to such repeal or modification.

EIGHTH: Except as otherwise expressly provided by the terms of any series of Preferred Stock permitting the holders of such series of Preferred Stock to act by written consent, any action required or permitted to be taken by the stockholders of the Corporation must be effected at a duly called annual or special meeting of stockholders of the Corporation, and the ability of the stockholders to consent in writing to the taking of any action is hereby specifically denied.

NINTH: Unless otherwise required by law or the terms of any resolution or resolutions adopted by the Board of Directors providing for the issuance of a class or series of the Preferred Stock, special meetings of stockholders, for any purpose or purposes, may be called by either (i) the Chair of the Board of Directors or (ii) the Chief Executive Officer of the Corporation, and shall be called by the Chief Executive Officer at the request in writing made pursuant to a resolution of a majority of the members of the Board of Directors. The ability of the stockholders to call a special meeting of stockholders is hereby specifically denied. At a special meeting of stockholders, only such business shall be conducted as shall be specified in the notice of meeting (or any supplement thereto).

TENTH: Meetings of stockholders may be held within or without the State of Delaware, as the By-Laws may provide. The books of the Corporation may be kept (subject to any provision contained in the DGCL) outside the State of Delaware at such place or places as may be designated from time to time by the Board of Directors or in the By-Laws of the Corporation.

ELEVENTH: In furtherance and not in limitation of the powers conferred upon it by the laws of the State of Delaware, the Board of Directors shall have the power, without the assent or vote of the stockholders, to adopt, amend, alter or repeal the Corporation’s By-Laws, except to the extent the By-Laws or this Second Amended and Restated Certificate of Incorporation otherwise provide. The affirmative vote of at least a majority of the entire Board of Directors shall be required to adopt, amend, alter or repeal the Corporation’s By-Laws. The Corporation’s

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By-Laws may also be adopted, amended, altered or repealed by the affirmative vote of the holders of at least a majority of the voting power of the capital stock of the Corporation then outstanding and entitled to vote thereon.

TWELFTH: Unless the Board of Directors otherwise determines, to the fullest extent permitted by law, the Court of Chancery of the State of Delaware shall be the sole and exclusive forum for (i) any derivative action or proceeding brought or purporting to be brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any current or former director, officer, other employee or stockholder of the Corporation to the Corporation or the Corporation’s stockholders, creditors or other constituents, (iii) any action asserting a claim arising pursuant to any provision of the DGCL or the Second Amended and Restated Certificate of Incorporation or By-Laws (as either may be amended from time to time) or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware, or (iv) any action asserting a claim that relates to the internal affairs or governance of the Corporation and arises under or by virtue of the laws of the State of Delaware; provided, that, if (and only if) the Court of Chancery of the State of Delaware dismisses any such action for lack of subject matter jurisdiction, such action may be brought in another state court sitting in the State of Delaware.

Unless the Corporation consents in writing to the selection of an alternative forum, the federal district courts of the United States of America shall, to the fully extent permitted by law, be the sole and exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act of 1933.

Any person or entity purchasing or otherwise acquiring or holding any interest in shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this Article TWELFTH.

THIRTEENTH: The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Second Amended and Restated Certificate of Incorporation in the manner now or hereafter prescribed in this Second Amended and Restated Certificate of Incorporation, the Corporation’s By-Laws or the DGCL, and all rights, preferences and privileges herein conferred upon stockholders are granted subject to such reservation.

This SecondAmended and Restated Certificate of Incorporation shall become effective at 11:59 p.m. (Eastern Time) on May 10, 2023.

IN WITNESS WHEREOF, the Corporation has caused this Second Amended and Restated Certificate of Incorporation to be executed on its behalf this 10th day of May, 2023.

CHAMPIONX CORPORATION

By: /s/ Julia Wright

Name: Julia Wright

Title: Senior Vice President, General Counsel and Secretary

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