Exhibit 3.1

RESTATED ARTICLES OF INCORPORATION

(without amendment)

OF PIONEER DRILLING COMPANY

Pursuant to the provisions of Article 4.07 of the Texas Business Corporation Act (the Act), Pioneer Drilling Company, a corporation organized and existing under the laws of the State of Texas (the
Corporation), hereby adopts the following Restated Articles of Incorporation, which accurately copy the entire text of the Corporations Articles of Incorporation and all amendments thereto that are in effect to date and
contain no change in any provision thereof except for the number of directors constituting the Board of Directors, the names and addresses of the members of the Board of Directors and registered agent, and the omission of the name and address of the
incorporator, and hereby certifies as follows:

1. The name of the Corporation is Pioneer Drilling Company. The Corporation
filed its original Articles of Incorporation with the Secretary of State of the State of Texas on November 19, 1979. The filing number issued to the Corporation by the Secretary of State is 49751200.

2. These Restated Articles of Incorporation have been approved in the manner required by the Act and the constituent documents of the
Corporation.

3. The Articles of Incorporation and all amendments thereto are hereby superseded by the following Restated
Articles of Incorporation, which accurately copy the entire text thereof:

ARTICLE ONE

Name

The name of the
Corporation is Pioneer Drilling Company.

ARTICLE TWO

Duration

The period of the duration of the Corporation is perpetual.

ARTICLE THREE

Purposes

The purposes for which the Corporation is organized are:



| | (a) | To explore, prospect, drill for, produce, market, sell and deal in and with petroleum, mineral, animal, vegetable, and other oils, asphaltum, natural gas,
gasoline, naphthene, hydrocarbons, oil shales, sulphur, salt, clay, coal, minerals, mineral substances, metals, ores of every kind or other mineral or nonmineral, liquid, solid, or volatile substances and products, by-products, combinations, and
derivatives thereof, and to buy, lease, hire, contract for, invest in, and otherwise acquire, and to own, hold, maintain, equip, operate, manage, mortgage, create security interests in, deal in and with, and to sell, lease, exchange, and otherwise
dispose of oil, gas, mineral, and mining lands, wells, mines, quarries, rights, royalties, overriding royalties, oil payments, and other oil, gas, and mineral interests, claims, locations, patents, concessions, franchises, real and personal
property, and all interests therein, vehicles, crafts, and machinery for use on land, water, or air, for prospecting, exploring, and drilling for, producing, gathering, purchasing, leasing, exchanging, or otherwise acquiring, selling, exchanging,
trading for, or otherwise disposing of such mineral and non mineral substances; and to do engineering and contracting and to design, construct, drill, bore, sink, develop, improve, extend, maintain, operate, and repair wells, mines, plants, works,
machinery, appliances, rigging, casing, and tools, for this Corporation and other persons, associations, or corporations.
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| | (b) | To establish and maintain a drilling business with authority to own and operate drilling rigs, machinery,
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| | tools, or apparatus necessary in the boring or otherwise sinking of wells for the production of oil, gas, or water; to manufacture, buy, sell, lease, let,
and hire machines and machinery, equipment, tools, implements, and appliances, and all other property, real and personal, useful or available in prospecting for and in producing, petroleum and natural gas and all other volatile and mineral
substances and their products and by-products and of all articles and materials in any way resulting from or connected therewith; to purchase, lease, construct, or otherwise acquire, exchange, sell, let, or otherwise dispose of, own, maintain,
develop, and improve any and all property, real or personal, plants, refineries, factories, warehouses, stores, and buildings of all kinds useful in connection with the business of the Corporation including the drilling for oil and gas wells or
mining in any manner or by any method permitted by law on such real property.
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| | (c) | To conduct and engage in any lawful business or activity for which corporations may be organized under the Act.
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ARTICLE FOUR

Capital Stock

The aggregate number of shares that the Corporation shall have the authority to issue, is 110,000,000 shares,
consisting of 100,000,000 shares of common stock, par value $0.10 per share (Common Stock), and 10,000,000 shares of preferred stock, par value $1.00 per share (Preferred Stock).

The descriptions of the different classes of capital stock of the Corporation and the preferences, designations, relative rights,
privileges and powers, and the restrictions, limitations and qualifications thereof, of said classes of stock are as follows:

Division A

The shares of Preferred Stock may be divided into and issued in one or more series, the relative rights and preferences of
which series may vary in any and all respects. The Board of Directors of the Corporation is hereby vested with the authority to establish series of Preferred Stock by fixing and determining all the preferences, limitations and relative rights of the
shares of any series so established, to the extent not provided for in these Articles of Incorporation or any amendment hereto, and with the authority to increase or decrease the number of shares within each such series; provided, however, that the
Board of Directors may not decrease the number of shares within a series below the number of shares within such series that is then issued. The authority of the Board of Directors with respect to each such series shall include, but not be limited
to, determination of the following:



| | 1. | the distinctive designation and number of shares of that series;
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| | 2. | the rate of dividend (or the method of calculation thereof) payable with respect to shares of that series, the dates, terms and other conditions upon which such
dividends shall be payable, and the relative rights of priority of such dividends to dividends payable on any other class or series of capital stock of the Corporation;
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| | 3. | the nature of the dividend payable with respect to shares of that series as cumulative, noncumulative or partially cumulative, and if cumulative or partially
cumulative, from which date or dates and under what circumstances;
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| | 4. | whether shares of that series shall be subject to redemption, and, if made subject to redemption, the times, prices, rates, adjustments and other terms and
conditions of such redemption (including the manner of selecting shares of that series for redemption if fewer than all shares of such series are to be redeemed);
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| | 5. | the rights of the holders of shares of that series in the event of voluntary or involuntary liquidation, dissolution or winding up of the Corporation (which
rights may be different if such action is voluntary than if it is involuntary), including the relative rights of priority in that event as to the rights of the holders of any other class or series of capital stock of the Corporation;
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| | 6. | the terms, amounts and other conditions of any sinking or similar purchase or other fund provided for the purchase or redemption of shares of that series;
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| | 7. | whether shares of that series shall be convertible into or exchangeable for shares of capital stock or other securities of the Corporation or of any other
corporation or entity, and, if provision is made for conversion or exchange, the times, prices, rates, adjustments and other terms and conditions of such conversion or exchange;
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| | 8. | the extent, if any, to which the holders of shares of that series shall be entitled (in addition to any voting rights provided by law) to vote as a class or
otherwise with respect to the election of directors of the Corporation or otherwise;
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| | 9. | the restrictions and conditions, if any, upon the issue or reissue of any additional Preferred Stock ranking on a parity with or prior to shares of that series
as to dividends or upon liquidation, dissolution or winding up;
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| | 10. | any other repurchase obligations of the Corporation, subject to any limitations of applicable law; and
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| | 11. | notwithstanding their failure to be included in (1) through (10) above, any other designations, preferences, limitations or relative rights of shares
of that series.
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Any of the designations, preferences, limitations or relative rights (including the
voting rights) of any series of Preferred Stock may be dependent on facts ascertainable outside these Articles of Incorporation.

Shares of any series of Preferred Stock shall have no voting rights except as required by law or as provided in the preferences, limitations and relative rights of that series.

Division B



| | 1. | Dividends. Dividends may be paid on the Common Stock out of any assets of the Corporation available for such dividends, subject to the rights of all outstanding
shares of capital stock ranking senior to the Common Stock in respect of dividends.
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| | 2. | Distribution of Assets. In the event of any liquidation, dissolution or winding up of the Corporation, after there shall have been paid to or set aside for the
holders of capital stock ranking senior to the Common Stock in respect of rights upon liquidation, dissolution or winding up the full preferential amounts to which they are respectively entitled, the holders of the Common Stock shall be entitled to
receive, pro rata, all the remaining assets of the Corporation available for distribution to its shareholders.
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| | 3. | Voting Rights. The holders of the Common Stock shall be entitled to one vote per share for all purposes upon which such holders are entitled to vote.
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Division C



| | 1. | No Preemptive Rights. No shareholder of the Corporation shall, by reason of his holding shares of any class or series of capital stock of the Corporation, have
any preemptive or preferential right to acquire or subscribe for any additional, unissued or treasury shares of any class or series of capital stock of the Corporation now or hereafter to be authorized, or any notes, debentures, bonds or other
securities convertible into or carrying any right, option or warrant to subscribe to or acquire shares of any class or series of capital stock of the Corporation now or hereafter to be authorized, whether or not the issuance of any such shares, or
such notes, debentures, bonds or other securities, would adversely affect the dividends or voting or other rights of such shareholder, and the Board of Directors may issue or authorize the issuance of shares of any class or series of capital stock
of the Corporation, or any notes, debentures, bonds or other securities convertible into or carrying rights, options or warrants to subscribe to or acquire shares of any class or series of capital stock of the Corporation, without offering any such
shares, either in whole or in part, to the existing shareholders of any class or series of capital stock of the Corporation.
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| | 2. | Share Dividends. Subject to any restrictions in favor of any series of Preferred Stock provided in the relative rights and preferences of such series, the
Corporation may pay a share dividend in shares of any class or series of capital stock of the Corporation to the holders of shares of any class or series of capital stock of the Corporation.
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| | 3. | No Cumulative Voting. Cumulative voting for the election of directors is expressly prohibited as to all shares of any class or series of capital stock of the
Corporation.
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ARTICLE FIVE

Initial Consideration for Issuance of Shares

The Corporation will not commence
business until it has received for the issuance of shares consideration of One Thousand and No/100 Dollars ($1,000.00), consisting of money, labor done or property received.

ARTICLE SIX

Initial Registered Office and Agent

The address of the current registered office of the Corporation is 350 North St. Paul Street, Dallas, Texas 78201, and the name of the
current registered agent of the Corporation at such address is CT Corporation System.

ARTICLE SEVEN

Data Respecting Directors

Section 1. Number, Election and Terms of Directors. The number of directors which will constitute the whole Board of Directors shall be fixed from time to time by a majority of the directors then in office, subject to an
increase in the number of directors by reason of any provisions contained in or established pursuant to Article Four, but in any event will not be less than three. The directors, other than those who may be elected by the holders of any series of
Preferred Stock, will be divided into three classes (with each class to be as nearly equal in number as possible): Class I, Class II and Class III. Each director will serve for a term ending on the third annual meeting of the Corporations
shareholders following the annual meeting at which that director was elected; provided, however, that the directors first designated as Class I directors will serve for a term expiring at the annual meeting of the Corporations shareholders
next following March 31, 2002, the directors first designated as Class II directors will serve for a term expiring at the annual meeting of the Corporations shareholders next following March 31, 2003, and the directors first
designated as Class III directors will serve for a term expiring at the annual meeting of the Corporations shareholders next following March 31, 2004. Each director will hold office until the annual meeting of the Corporations
shareholders at which that directors term expires and, the foregoing notwithstanding, will serve until his successor shall have been duly elected and qualified or until his earlier death, resignation or removal.

At each annual meeting of the Corporations shareholders, the directors elected to succeed those whose terms then expire will be of
the same class as the directors they succeed, unless, by reason of any intervening changes in the authorized number of directors, the Board of Directors shall have designated one or more directorships whose term then expires as directorships of
another class in order more nearly to achieve equality of number of directors among the classes.

In the event of any
change in the authorized number of directors, each director then continuing to serve as such will nevertheless continue as a director of the class of which he is a member until the expiration of his current term, or his prior death, resignation or
removal. Subject to the applicable provisions of the Texas Business Corporation Act, as amended, the Board of Directors will specify the class to which a newly created directorship will be allocated.

Election of directors need not be by written ballot unless the Bylaws of the Corporation so provide.

Section 2. Names and Addresses. The number of directors constituting the Board of Directors as of the date of these Restated Articles
of Incorporation is five, and the names and addresses of the persons who are elected to serve as directors until the next annual meeting of the shareholders, and until their successors shall have been elected and qualified are:



|                  |  |                               
|----------------- |  | ------------------------------
|Name              |  | Address                       
|                  | 
|Wm. Stacy Locke   |  | 1250 N.E. Loop 410, Suite 1000
|                  |  | San Antonio, Texas 78209      
|                  | 
|Dean A. Burkhardt |  | 1250 N.E. Loop 410, Suite 1000
|                  |  | San Antonio, Texas 78209      
|                  | 
|C. John Thompson  |  | 1250 N.E. Loop 410, Suite 1000
|                  |  | San Antonio, Texas 78209      





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|               |  |                               
|-------------- |  | ------------------------------
|John M. Rauh   |  | 1250 N.E. Loop 410, Suite 1000
|               |  | San Antonio, Texas 78209      
|               | 
|Scott D. Urban |  | 1250 N.E. Loop 410, Suite 1000
|               |  | San Antonio, Texas 78209      

Section 3. Removal of Directors. No director of the Corporation may be removed
from office as a director by vote or other action of the shareholders or otherwise except for cause, and then only by the affirmative vote of the holders of at least a majority of the votes of all outstanding shares of capital stock of the
Corporation generally entitled to vote in the election of directors, voting together as a single class, at a meeting of shareholders called expressly for that purpose. Except as applicable law otherwise provides, cause for the removal of a director
will be deemed to exist only if the director whose removal is proposed: (i) has been convicted, or has been granted immunity to testify in any proceeding in which another has been convicted, of a felony by a court of competent jurisdiction and
that conviction is no longer subject to direct appeal; (ii) has been found to have been grossly negligent or guilty of misconduct in the performance of his duties to the Corporation in any matter of substantial importance to the Corporation by
(A) the affirmative vote of a majority of the Directors then in office at any meeting of the Board of Directors called for that purpose or (B) a court of competent jurisdiction; or (iii) has been adjudicated by a court of competent
jurisdiction to be mentally incompetent and such mental incompetency directly affects his ability to serve as a director of the Corporation. Notwithstanding the foregoing, whenever holders of outstanding shares of one or more series of Preferred
Stock are entitled to elect members of the Board of Directors pursuant to the provisions applicable in the case of arrearages in the payment of dividends or other defaults established by the Board of Directors with respect to any series of Preferred
Stock pursuant to the provisions of Article Four, any such director of the Corporation so elected may be removed in accordance with the provisions established by the Board of Directors with respect to that series.

ARTICLE EIGHT

Indemnification

The Corporation shall have the power to (and the Board of Directors shall have the authority to cause the Corporation
to) indemnify each of its directors, officers, employees and agents, and each person who is or was serving at the request of the Corporation as a director, officer, partner, venturer, proprietor, trustee, employee, agent or similar functionary of
another foreign or domestic corporation, an employee benefit plan or any other enterprise or other entity, to the fullest extent permitted by applicable law. Any repeal or modification of any provision of the bylaws of the Corporation providing for
indemnification of any of such persons shall not adversely affect any right or protection of such person existing pursuant to those bylaws with respect to any act or omission occurring prior to the time of such repeal or modification. The
Corporation shall also have the power to (and the Board of Directors shall have the authority to cause the Corporation to) purchase and maintain insurance on behalf of any such person, whether or not such person is then serving, against any
liability asserted against 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 to indemnify such person against such liability under the Texas Business
Corporation Act, as amended.

ARTICLE NINE

Transactions with the Corporation

Any contract or transaction between the
Corporation and one or more of its directors or officers, or between the Corporation and any other domestic or foreign corporation or other entity in which one or more of its directors or officers are directors or officers or have a financial
interest, shall be valid notwithstanding whether the director or officer is present at or participates in the meeting of the Board of Directors of the Corporation or committee thereof which authorizes the contract or transaction, or solely because
his or their votes are counted for such purpose, if anyone of the following is satisfied:



| | 1. | the material facts as to his or their relationships or interests and as to the contract or transaction are disclosed or are known to the Board of Directors of
Corporation or a committee thereof, and the Board of Directors or such committee in good faith authorizes the contract or transaction by the affirmative vote of a majority of the disinterested directors, even though the disinterested directors be
less than a quorum; or
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| | 2. | the material facts as to his or their relationships or interests and as to the contract or transaction are disclosed or are known to the shareholders entitled to
vote thereon, and the contract or transaction is specifically approved in good faith by vote of the shareholders of the Corporation; or
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| | 3. | the contract or transaction is fair as to the Corporation as of the time it is authorized, approved or ratified by the Board of Directors of the Corporation, a
committee thereof or the shareholders of the Corporation.
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No director of officer of the Corporation shall be liable to account to the Corporation
for any profits realized by, from or through any contract or transaction by reason of any interest therein when that contract or transaction has been authorized or ratified in accordance with the foregoing provisions of this Article Nine. This
Article Nine shall not be construed to invalidate any contract or transaction which would otherwise be valid in the absence of the provisions hereof.

ARTICLE TEN

Limitation of Liability

No director of the Corporation shall have any liability to the Corporation or any of its shareholders for monetary damages for any act or
omission in the directors capacity as a director of the Corporation, except that nothing in this Article Ten shall eliminate or limit the liability of a director to the extent the director is found liable for: (1) a breach of the
directors duty of loyalty to the Corporation or its shareholders; (2) an act or omission not in good faith that constitutes a breach of duty of the director to the Corporation or any act or omission that involves intentional misconduct or
a knowing violation of the law; (3) a transaction from which the director received an improper benefit, whether or not the benefit resulted from an action taken within the scope of the directors office; or (4) an act or omission for
which the liability of a director is expressly provided by an applicable statute. If the Texas Miscellaneous Corporation Laws Act, as amended, or the Texas Business Corporation Act, as amended, is hereafter amended so as to authorize action further
eliminating or limited the liability of directors, then the liability of a director of the Corporation shall be eliminated or limited to the fullest extent permitted by such statutes, as so amended. The provisions of this Article Ten shall not be
deemed to limit or preclude indemnification of a director by the Corporation for any liability of a director which has not been eliminated or limited by the provisions of this Article Ten. Any repeal or modification of this Article Ten shall be
prospective only and shall not adversely affect any right or protection of a director of the Corporation existing at the time of such repeal or modification.

ARTICLE ELEVEN

Special Meetings of Shareholders

Special meetings of shareholders of the Corporation may be called by the Corporations chairman of the board or president or the
Board of Directors. Subject to the provisions of the Corporations bylaws governing special meetings, holders of not less than 50% of the outstanding shares of capital stock of the Corporation entitled to vote at the proposed special meeting
may also call a special meeting of shareholders of the Corporation by furnishing the Corporation a written request which states the purpose or purposes of the proposed meeting in the manner set forth in the bylaws.











IN WITNESS WHEREOF, I have hereunto set my hand this 25thday of February 2009.



/s/ Carlos R. PenaCarlos R. Pena, Secretary