Working Regulations at the 2026 Annual General Meeting of Shareholders (Draft)

• To regulate the activities of the Meeting in accordance with the agenda approved by the Meeting.

• To guide the Meeting delegates on discussion.

• To submit the proposals and conclusions on necessary matters to the General Meeting of Shareholders for voting.

• To answer the matters required by the General Meeting of Shareholders.

• To take necessary and reasonable measures to direct the conduct of the Meeting in an orderly manner, complying with the approved agenda and reflecting the wishes of the majority of attendees.

  Article 3. The Chairman's decisions on the order, procedures or events related to the Meeting's procedures and order arisen randomly outside the agenda shall have the highest effectiveness in the Meeting. Article 4. The Secretariat (including 02 persons) nominated by the Presidium. The Secretariat is responsible to the Presidium and the General Meeting of Shareholders for its duties, namely:

• To record fully, honestly the contents of the Meeting and the matters which have been approved or noted by General Meeting of Shareholders.

• To prepare the minutes of meeting and the Resolutions on the contents approved at the Meeting.

• To support the Presidium in publishing draft of documents, the conclusions of the Meeting and the Presidium's notices to Shareholders upon request.

  Article 5. The Shareholders Eligibility Verification Committee is appointed by the Board of Directors. The Committee is responsible for verifying the eligibility of Shareholders who register to attend the Meeting and reporting to the General Meeting of Shareholders on the number and proportion of Shareholders in attendance. Article 6. The Vote Counting Committee consists of five (5) members and operates under the supervision of the independent auditing firm approved by the General Meeting of Shareholders, based on the proposal of the Chairman of the Meeting. The Vote Counting Committee is responsible for guiding Shareholders on the voting procedures at the Meeting, recording the voting results of Shareholders or their authorized representatives on the matters requiring approval, and subsequently summarizing the results, preparing the vote counting minutes, and reporting the outcomes at the Meeting. Article 7. Shareholders attending at the Meeting

  Shareholders holding at least one issued share of Petrovietnam Drilling & Well Service Corporation (PV Drilling) shall have the right to attend the General Meeting of Shareholders in accordance with the Charter of PV Drilling. A Shareholders may authorize another person to attend the Meeting on their behalf in compliance with Article 15 of the Charter of PV Drilling. The authorized representative shall not further delegate such authority to another person.

  Shareholders or their duly authorized representatives may attend the Meeting either in person or virtually (as guided in the Invitation Letter). A Shareholder (whether attending in person or virtually) shall be deemed to have attended the Meeting only when their Access Account has been successfully logged in in accordance with the instructions and within the prescribed time. To log in, the Shareholder or their duly authorized representative shall access the link announced by PV Drilling and use the Access Account provided in the Invitation Letter. For the purpose of this Regulation, a Shareholder's status shall be considered verified when their Access Account, either directly or through their duly authorized representative, has been successfully logged in to the designated Online System.

  During the Meeting, Shareholders must comply with the instructions of the Presidium; behave in a civil and respectful manner, avoid causing disorder, and respect the outcome of the Meeting.

  Article 8. For giving opinions in the Meeting: Shareholders perform the discussions under the Chairman's instructions via the following means:

• To speak directly at the Meeting (for Shareholders attending in-person) or speak online via the Online System interface, subject to the Presidium's approval before speaking; or

• To submit opinions to the Presidium though the Secretariat during the Meeting (for Shareholders attending in-person) or via the Chat function on the Online System. The Secretariat is responsible for collecting and summarizing of Shareholders' opinions and summiting them to the Presidium.

• The Chairman of the Meeting shall arrange for the Shareholders to speak in order and answer the matters from the Shareholders. Each shareholder is to speak no more than 03 minutes/time and contents of speaking should be brief and avoid duplication.

The Meeting is to discuss and vote on each matter in the Agenda though electronic voting

(applicable to both in-person and online Shareholders) in accordance with the Voting Instruction posted in the website of PV Drilling at https://www.pvdrilling.com.vn (section Investor relations/ AGM documents). The voting results on each matter shall be reported to the Meeting by the Chairman or a person authorized by the Chairman immediately after finishing the vote counting.

Voting is performed in several sessions with different voting deadlines. The Chairman shall announce the end time of voting and the voting deadlines for each specific matter on the Online System for Shareholders to exercise their rights.

Shareholders who log in late after the Meeting has taken place still have the right to vote on the matters that their voting deadlines yet expired. The validity and voting results of the previous voting sessions will not be affected.

Voting results of Shareholders or their duly authorized representatives on each matter are the total of the results of electronic voting recorded at the end time of voting. From the end time of voting for each matter at the Meeting, the Online System shall lock the function to vote on said matters and Shareholders or their duly authorized representatives cannot vote on such locked matters.

Electronic voting may be conducted prior to and/or during the General Meeting of Shareholders. Shareholders or their duly authorized representatives shall have the right to vote from the time the Online System is opened until the end of the voting period as announced by the Presidium. The Online System will be opened at 8:30 A.M. on April 19th, 2026, to allow Shareholders or their duly authorized representatives to access and cast their electronic votes.

This Regulation is made in accordance with the Regulation of Guidance on Online Meeting and Electronic Voting to conduct Online General Meeting of Shareholders or Collecting Shareholders' opinions in writing of PV Drilling, the Charter of PV Drilling and the law on Enterprises.

We submit to the Annual General Meeting of Shareholders for consideration and approval.