Oil India Limited Duliajan Electrician and Associate Engineer Recruitment 2026 – 2 Posts

Vacancies: 2 · Posts: 2 · Type: Contractual · Mode: Walk-in · Fee: Nil · Walk-in: 07 October 2026, Duliajan · Pay: ₹21,450 + ₹825/day | ₹24,960 + ₹960/day · Selection: Walk-in Personal Assessment (100 marks) · Location: Duliajan, Assam

Oil India Limited does not wait for a large workforce drive when a field site needs licensed electrical hands. On 23 September 2026, it issued Advertisement No. HRAQ/CONT-WP-B/26-307 for two contractual seats at Field Headquarters, Duliajan, Dibrugarh district, Assam.

Oil India Limited (OIL), a Maharatna public sector undertaking under the Ministry of Petroleum and Natural Gas, Government of India, is filling 1 Contractual Electrician post and 1 Contractual Associate Engineer (Electrical) post. Both are for Assam and Arunachal Pradesh domicile holders only. The work sits in the upstream oil and gas sector and covers testing, pre-commissioning and commissioning of electrical systems, including captive gas and diesel gensets.

Registration and the Walk-in for Personal Assessment are on 07 October 2026 at Duliajan Club, Oil India Limited, Duliajan. Report between 07:00 AM and 09:00 AM. Candidates need the right trade or diploma certificate, a valid Assam/Arunachal electrical licence, and two years of post-qualification electrical experience. There is no online form and no application fee.

Also Read: DLRS Assam Land Record Assistant Recruitment 2026 – Apply Online for 579 Posts

Who Should Apply?

• Class 10th + 2-year ITI Electrician (NCVT/SCVT) + Electrical Workman’s Permit (Part I & II) + 2 years’ post-qualification electrical experience → Contractual Electrician – 1 post (UR)
• 3-year Diploma in Electrical Engineering + Electrical Supervisor’s Certificate of Competency (Part I, II, III & IV) + 2 years’ post-qualification electrical experience → Contractual Associate Engineer (Electrical) – 1 post (UR)
• Preferred, not mandatory (Associate Engineer only): Electrical Supervisor’s Certificate of Competency Part VIII. Part VIII is an added advantage. It does not replace Parts I–IV.

PwBD identified categories

• Electrician: HH; OAL, Dw; MD involving these categories
• Associate Engineer (Electrical): HH; OL, Dw, AAV, LC; ASD (Mild), SLD; MD involving these categories

Ex-Servicemen: reservation as per Government of India guidelines. Exact extra age years are not printed in this advertisement.

Who cannot apply

• Candidates who are not domicile of Assam or Arunachal Pradesh
• Applicants without a valid Electrical Workman’s Permit (Part I & II) for Electrician, or without a valid Supervisor’s Certificate (Part I–IV) for Associate Engineer
• Candidates with less than two years of post-qualification electrical work experience
• Anyone above 35 years as on 07 October 2026 (the registration date), unless a printed Government of India relaxation later applies at scrutiny
• Candidates who report after 09:00 AM on 07 October 2026 (registration is closed)

Side-by-side comparison

Use our Experience Calculator to confirm that your two years are counted up to 07 October 2026.

Important Dates

If too many candidates register on 07 October 2026, remaining registered names are assessed on subsequent day(s). Late arrivals after 09:00 AM are not registered.

Quick Overview – Oil India Electrician Recruitment 2026

• Organisation: Oil India Limited (OIL)
• Sector: Oil and Gas (upstream exploration and production)
• Notification Number: HRAQ/CONT-WP-B/26-307 dated 23 September 2026
• Posts: Contractual Electrician; Contractual Associate Engineer (Electrical)
• Total Vacancies: 2 (1 + 1, both UR)
• Job Location: Field Headquarters, Duliajan, Dibrugarh district, Assam; posting anywhere as decided by the Competent Authority, including remote installations
• Domicile: Assam and Arunachal Pradesh only
• Job Type: Contractual (maximum 1 year; initial 6 months, extendable by 6 months)
• Walk-in: 07 October 2026, 07:00 AM–09:00 AM, Duliajan Club, Oil India Limited, Duliajan
• Official Website: Oil India current openings page
• Last Date / Walk-in Date: 07 October 2026
• Notification PDF: Download Oil India Electrician and Associate Engineer Advertisement HRAQ/CONT-WP-B/26-307 PDF
• Application Form: Same PDF (Personal Bio-Data on the last two pages)

What Posts Are Available?

Both seats are UR. There is no SC, ST, OBC (NCL) or EWS vacancy in this advertisement. PwBD and Ex-Servicemen reservation follows Government of India guidelines against the identified categories listed above.

Practical takeaway: this is a two-seat, licence-gated walk-in. The Electrician seat fits a 10th-pass ITI holder with a workman’s permit. The Associate Engineer seat fits a diploma holder with a four-part supervisor certificate. Without the Assam/Arunachal licence and two years of electrical experience, the walk-in registration itself will be refused.

Age for both posts: 18–35 years as on 07 October 2026.

What will you actually do?

Contractual Electrician: minor repair and checking of motors, panels, wiring and light fittings; earthing reconnection; support for a 2 × 1.4 MW gas genset captive power plant, 750 kVA diesel genset, 250 kW load bank, battery and UPS during testing and commissioning; cable termination and NFLP/FLP fittings.

Contractual Associate Engineer (Electrical): preliminary testing; quality and safety during construction and pre-commissioning; safe operation of electrical equipment; troubleshooting of motor feeders, starters and control wiring. Part VIII supervisor competency is useful for plant-side supervision.

The notification says this list is indicative, not exhaustive. Shifts, on-call duty and remote/far-flung OIL locations are part of the engagement.

What Is the Age Limit for This Recruitment?

Age is reckoned as on the date of registration for the Walk-in for Personal Assessment (07 October 2026).

Date of birth proof: only the Class 10th Admit Card, Pass Certificate or Marksheet issued by a Government-recognised Education Board. No other DoB document is accepted.

Reservation for PwBD and Ex-Servicemen is “as per Govt of India Guidelines.” This advertisement does not print category-wise extended maximum ages. Do not assume +3 / +5 / +10 years until you verify the applicable DoPT/GoI rule against your category at scrutiny.

Examples: ✅ A 34-year-old UR candidate born on 08 October 1991 — eligible (within the 35-year limit as on 07 October 2026). ❌ A 36-year-old UR candidate born on 07 October 1990 — not eligible (exceeds maximum age by 1 year).

Use our Age Eligibility Calculator to check instantly.

What Is the Remuneration for Electrician Posts in Duliajan?

Pay is contractual emolument, not a 7th CPC or IDA regular scale.

Indicative monthly gross (not an official salary slip):

• Electrician, 22 working days: ₹21,450 + (₹825 × 22) = ₹39,600
• Electrician, 26 working days: ₹21,450 + (₹825 × 26) = ₹42,900
• Associate Engineer, 22 working days: ₹24,960 + (₹960 × 22) = ₹46,080
• Associate Engineer, 26 working days: ₹24,960 + (₹960 × 26) = ₹49,920

Employee EPF contribution (typically 12% of PF wages, once UAN is seeded) will reduce take-home. Actual net therefore sits below the gross figures above. Hostel or company quarters are not promised. Selected candidates arrange accommodation at their own cost.

These figures are attendance-linked estimates from the printed fixed and variable rates. Verify the exact month’s working days and PF wage from the engagement letter.

What Is the Application Fee?

No application fee is mentioned in Advertisement No. HRAQ/CONT-WP-B/26-307. The process is a walk-in registration. Do not pay anyone who claims to “hold a seat” or issue an OIL appointment letter.

How to Attend the Walk-in?

There is no online portal. Selection starts only after on-the-spot registration at the venue.

Venue: Duliajan Club, Oil India Limited, Duliajan, Assam
Date: 07 October 2026
Registration time: 07:00 AM to 09:00 AM (no entry for registration after 09:00 AM)

Steps

1. Download Oil India Electrician and Associate Engineer Advertisement HRAQ/CONT-WP-B/26-307 PDF from the Oil India current openings page.
2. Print and fill the Personal Bio-Data form printed on the last two pages of that PDF. Suggested (not a notification rule): fill it in block letters the night before and carry a spare copy.
3. Carry originals and one set of self-attested photocopies (list in Documents below), plus one recent 3 cm × 3 cm colour photograph.
4. Reach Duliajan Club early enough to finish registration between 07:00 AM and 09:00 AM.
5. Documents are checked from originals during registration. Only candidates who meet the printed eligibility are allowed into the Personal Assessment.
6. Appear for the 100-mark Walk-in for Personal Assessment. The qualifying mark is 50 for all categories.
7. If registered numbers exceed venue capacity, your turn may move to the next day(s). Keep travel plans flexible.

No Travelling Allowance or Daily Allowance is paid. Boarding, lodging and joining travel are on you.

Serving Government / PSU / Autonomous Body employees should carry a valid No Objection Certificate signed by the concerned authority. If selected, a Release Letter in original is required at engagement. NOC readiness matters at registration and joining; do not treat missing NOC as a minor paperwork gap.

Common Mistakes to Avoid

1. Arriving after 09:00 AM. The advertisement is explicit: no candidate is registered beyond that window under any circumstances.
2. Leaving the electrical licence at home. Workman’s Permit (Electrician) or Supervisor’s Certificate Parts I–IV (Associate Engineer) must be valid and produced in original. Photocopies alone will not get you past registration.
3. Treating a private wiring job as “electrical experience” without a proper certificate. Experience must be post-qualification electrical jobs in Government / Semi-Government / PSU / Public Limited / Private organisations, on letterhead, with dates.
4. Coming from another state. The opening paragraph limits engagement to domicile of Assam and Arunachal Pradesh.
5. Assuming this is a regular OIL workperson post. Clause 6.0 (j) states the engagement confers no right of employment or regularisation in Oil India Limited.

অইল ইণ্ডিয়া ডুলিয়াজান ইলেক্ট্ৰিচিয়ান আৰু এছ’চিয়েট ইঞ্জিনিয়াৰ নিযুক্তি 2026 – 2 পদ

অইল ইণ্ডিয়া লিমিটেডে 23 ছেপ্টেম্বৰ 2026 তাৰিখে বিজ্ঞাপন নং HRAQ/CONT-WP-B/26-307ৰ জৰিয়তে ডুলিয়াজান ফিল্ড হেডকোৱাৰ্টাৰত দুটা চুক্তিভিত্তিক বৈদ্যুতিক আসন মুকলি কৰিছে। এটা আসন কন্ট্ৰেকচুৱেল ইলেক্ট্ৰিচিয়ান আৰু আনটো কন্ট্ৰেকচুৱেল এছ’চিয়েট ইঞ্জিনিয়াৰ (ইলেক্ট্ৰিকেল)। কেৱল অসম আৰু অৰুণাচল প্ৰদেশৰ ডমিচাইলধাৰীহে আবেদন কৰিব পাৰে। ৱাক-ইন পঞ্জীয়ন 07 অক্টোবৰ 2026, ৰাতিপুৱা 07:00 বজাৰ পৰা 09:00 বজালৈ ডুলিয়াজান ক্লাব, অইল ইণ্ডিয়া লিমিটেডত।

কোন আবেদন কৰিব পাৰে?
ইলেক্ট্ৰিচিয়ানৰ বাবে দশম উত্তীৰ্ণ, দুবছৰীয়া ITI ইলেক্ট্ৰিচিয়ান (NCVT/SCVT), বৈধ ৱৰ্কমেন পাৰ্মিট খণ্ড I আৰু II, আৰু যোগ্যতাৰ পিছত দুবছৰৰ বৈদ্যুতিক অভিজ্ঞতা লাগে। এছ’চিয়েট ইঞ্জিনিয়াৰৰ বাবে তিনিবছৰীয়া ইলেক্ট্ৰিকেল ডিপ্লমা, ছুপাৰভাইজৰ ছাৰ্টিফিকেট খণ্ড I–IV, আৰু দুবছৰৰ অভিজ্ঞতা বাধ্যতামূলক। পার্ট VIII কেৱল বাঞ্ছনীয়। বয়স 18ৰ পৰা 35 বছৰ, 07 অক্টোবৰ 2026ৰ দিনা গণনা কৰা হ’ব।

দৰমহা আৰু নিৰ্বাচন কি?
ইলেক্ট্ৰিচিয়ানৰ স্থিৰ দৰমহা মাহিলী ₹21,450 আৰু প্ৰতি কৰ্মদিনত ₹825। এছ’চিয়েট ইঞ্জিনিয়াৰৰ স্থিৰ দৰমহা ₹24,960 আৰু প্ৰতি কৰ্মদিনত ₹960। EPF আৰু গ্ৰেচুইটি প্ৰযোজ্য। চুক্তি সৰ্বাধিক এবছৰ: প্ৰথমে ছমাহ, তাৰ পিছত আৰু ছমাহ বৃদ্ধি হ’ব পাৰে। নিৰ্বাচন 100 নম্বৰৰ ব্যক্তিগত মূল্যায়নৰ মেৰিটত; পাছ নম্বৰ 50। আবেদন মাচুল নাই।

কেনেকৈ যাব?
অনলাইন ফৰ্ম নাই। বিজ্ঞাপন PDFৰ শেষৰ দুই পৃষ্ঠাৰ বায়’-ডাটা ভৰাই মূল নথি আৰু স্ব-প্ৰমাণিত ফটোকপি লৈ নির্ধাৰিত সময়ত উপস্থিত থাকক। 09:00 বজাৰ পিছত পঞ্জীয়ন বন্ধ। এইটো স্থায়ী চৰকাৰী পদ নহয়। সদৌ খবৰ oil-india.comৰ বৰ্তমানৰ খালী পদ পৃষ্ঠাত চাওক।

How Are Candidates Selected?

Selection is a Walk-in for a personal assessment of 100 marks. There is no separate written examination named in this advertisement.

1. On-venue registration between 07:00 AM and 09:00 AM on 07 October 2026, with original-document check.
2. Eligibility gate. Candidates who fail qualification, licence, experience, age or domicile checks are not allowed into the assessment.
3. Personal Assessment (100 marks). Suggestive parameters: professional knowledge and skills in the concerned discipline; professional knowledge and skills in the allied discipline; personal attributes and soft skills.
4. Qualifying mark: 50 for all categories.
5. Merit list among those who score 50 or above.
6. Pre-engagement formalities for provisionally selected names: document re-check, medical fitness certificate from a Government-registered medical practitioner, police verification (character and antecedents), UAN for EPF, and Release Letter if already employed.

If registrations exceed capacity on 07 October 2026, assessment of remaining already registered candidates continues on later day(s). That is not a second chance for people who missed the 09:00 AM cut.

Final engagement still depends on medical fitness, police verification and other clauses in the advertisement. Marks alone do not equal joining.

No interview stage beyond this Personal Assessment is listed. No TA/DA is paid for appearing.

Why Does Oil India Duliajan Matter?

Oil India Limited is a Maharatna CPSE in crude oil and natural gas exploration and production, with Field Headquarters at Duliajan in Upper Assam and a corporate office at Noida. The Duliajan complex anchors OIL’s producing fields, pipelines and captive power systems across Assam and Arunachal Pradesh.

Candidates search “OIL Duliajan electrician vacancy”, “Oil India contractual engineer walk-in” and “Duliajan electrical supervisor job” because licensed electrical work on live oil installations is scarce in the private market at this pay band, and because OIL’s name carries PSU weight on a résumé. The sector phrase that keeps coming up is upstream oil and gas operations, not a generic “factory electrician” listing.

The honest limit is scale and tenure. This notice is for two UR seats for at most twelve months, with shifts, on-call duty and hazardous remote locations. Accommodation is self-arranged. For a wider Assam PSU picture, see our Assam government jobs hub and oil and gas sector openings. Organisation context: Oil India Limited.

The SahisarkariJobs.in Analyst’s Take

This walk-in sits in the same family as OIL’s own earlier contractual electrical notices at Duliajan and as short-tenure electrician/supervisor contracts that ONGC and IOCL issue around producing assets. It is not in the same queue as GATE-based OIL/ONGC executive trainee drives or a regular workperson CBT. Those give a cadre path. This one gives a year of site exposure and EPF-linked cash.

Also Read: BCPL Assam Non Executive Recruitment 2026 – Apply Online for 24 Foreman, Technician & Operator Posts

Best fit: Assam or Arunachal candidates who already hold the correct Electrical Licensing Board permit or supervisor certificate, have two clean years on electrical jobs, and can reach Duliajan before 09:00 AM on 07 October 2026. Diploma holders with Parts I–IV plus Part VIII are the strongest Associate Engineer profiles. ITI Electrician + Part I & II is the only realistic path to the other seat.

Skip this if you need permanence. The advertisement states, in plain words, that the contract creates no claim for regularisation. Also skip if you cannot work shifts in remote installations, cannot fund your own stay in Duliajan, or are still waiting for the licensing board to issue Parts I–IV.

Practical tip: Pack the original licence, Class 10th DoB page, semester-wise marksheets, experience letters with From–To dates, and a filled Bio-Data from the official PDF in one file. Registration is a document gate, not a friendly helpdesk.

Realistic timeline: OIL asks provisionally selected candidates to join immediately, with a maximum 15-day extension. From walk-in to joining can be days to a few weeks, not a six-month exam cycle.

What Documents Are Required for Assam PSU Walk-ins?

Bring originals and one self-attested photocopy set on 07 October 2026:

• Filled Personal Bio-Data (last two pages of the official advertisement)
• One recent 3 cm × 3 cm colour passport photograph
• Valid photo ID and address proof issued by a competent Government authority
• Class 10th certificate containing date of birth (only accepted DoB proof)
• Class 10th Admit Card, Marksheet and Pass Certificate
• Essential qualification set: all semester/year marksheets, pass certificate, and experience certificates
• Valid caste / NCL / EWS / disability / Ex-Servicemen discharge book, if claiming that category
• Valid Electrical Workman’s Permit or valid Electrical Supervisory Certificate of Competency from the Electrical Licensing Board, Government of Assam / Arunachal Pradesh
• Valid NOC if employed in Government / PSU / Autonomous Body
• EPF Member Pass Book, if available
• Aadhaar Card, PAN Card, Bank Pass Book

Document alert: licences issued by other state boards are not what clause 5.0 (g) asks for. Get Assam or Arunachal endorsement in hand before you travel. Experience certificates must show electrical work after the ITI or diploma date, not generic “helper” duty.

Service Conditions

• Purely contractual. Maximum tenure 1 year. Initial 6 months, extendable by another 6 months subject to departmental need, performance, conduct and medical fitness.
• Either side may terminate with 15 days’ notice. Tenure ends on expiry without a separate closing notice.
• 6 days’ paid leave for each 6-month engagement period.
• EPF and Gratuity apply. Submit UAN at engagement.
• No other assignment during the contract.
• Posting anywhere the Competent Authority decides, including remote and hazardous installations, shifts and on-call duty.
• Accommodation at the candidate’s cost.
• Medical fitness certificate from a Government-registered medical practitioner at joining.
• Police verification certificate/report at engagement.
• Release Letter in original if leaving another organisation.
• Disputes: Dibrugarh District Court only.
• OIL may cancel or postpone the process without assigning a reason.

What Happens After Selection?

1. OIL intimates provisionally selected candidates through official communication to report for pre-engagement formalities.
2. You produce originals again: the medical fitness certificate in the prescribed format, police verification, UAN, Aadhaar, PAN and bank details.
3. If you are already employed, you submit the original Release Letter. Joining is expected immediately; management may allow up to 15 extra days. Missing that window cancels the provisional selection.
4. Contract tenure starts from the engagement date. You will work under the reporting officer/HoD on testing, pre-commissioning and allied electrical jobs, including remote sites and on-call duty.
5. Monthly emoluments combine the fixed component and variable pay for actual working days. EPF is deducted as applicable. Maternity leave, if availed, is paid only on the fixed component.
6. At six months, extension depends on need and your record. At twelve months, the contract ends. There is no automatic absorption into regular OIL service.

Contact & Helpline

Recruitment-specific phone and email are not printed in Advertisement No. HRAQ/CONT-WP-B/26-307.

• Department on earlier OIL walk-in results for the same roles: HR Acquisitions Department, Oil India Limited, Field Headquarters, Duliajan, Dibrugarh district, Assam
• Registered office city: Duliajan, Assam – 786602
• Updates path given in the notice: https://www.oil-india.com → OIL for All → Career at OIL → Current Openings / Results
• Current openings list: Oil India advertisement list
• Jurisdiction: Dibrugarh District Court

⚠️ Contact details sourced from the official notification/website. Verify before contacting. NEVER pay any money over the phone or to any person claiming to offer job assistance. Report fraud to cybercrime.gov.in. OIL has separately warned that fake appointment letters are in circulation.

Important Links – Oil India Electrician 2026

FAQs – Oil India Electrician Recruitment 2026

What is the last date to apply for Oil India Electrician 2026?

07 October 2026, but only as a walk-in. Registration at Duliajan Club runs from 07:00 AM to 09:00 AM. There is no online form. Nobody is registered after 09:00 AM. Overflow assessments, if needed, cover only candidates already registered that morning.

What is the age limit for Oil India Electrician posts?

18 to 35 years as on 07 October 2026, the registration date. Only Class 10th Board documents prove the date of birth. PwBD and Ex-Servicemen reservation follows Government of India guidelines; this PDF does not print extra maximum ages by category.

Is there an exam for Oil India Electrician, or is it interview-based?

No written exam is mentioned. Selection is a 100-mark Walk-in for Personal Assessment on professional knowledge, allied skills and personal attributes. The pass mark is 50. Merit among qualified candidates decides the two seats, subject to medical and police checks.

What is the salary of Oil India contractual Electrician posts?

Electrician: ₹21,450 fixed plus ₹825 per working day. Associate Engineer: ₹24,960 fixed plus ₹960 per working day. Indicative gross is about ₹39,600–₹42,900 and ₹46,080–₹49,920 a month before EPF, depending on working days.

Can final-year students or result-awaited candidates apply for OIL 2026?

No. Qualification, licence and two years’ post-qualification experience must already be in hand on the registration date. Semester marksheets and pass certificates are checked from originals at Duliajan Club. A result-awaited diploma or ITI will not pass the gate.

Is Oil India Electrician a permanent government job?

No. This is a contractual engagement for a maximum of one year. The advertisement states it shall not confer any right or claim for employment or regularisation in Oil India Limited. EPF and Gratuity apply during the contract only.

Can candidates from other states apply for this OIL recruitment?

No. Oil India Limited intends to engage personnel who are domicile of Assam and Arunachal Pradesh. Other-state candidates should not travel for this walk-in. All-India OIL executive or workperson CBTs are separate advertisements.

Where will I be posted if I get selected?

Field Headquarters, Duliajan is the engagement base, but selected contract staff can be placed in any location the Competent Authority decides, including remote OIL installations. Shifts, hazardous work and on-call duty are part of the written job nature.

Do I need GATE for these Oil India electrical seats?

No. GATE is not a requirement here. The requirements are the Assam/Arunachal electrical licence, the ITI or diploma certificate, and two years of electrical experience. GATE-based OIL executive trainee notifications are a different recruitment stream.

Is Oil India a government company?

Yes. Oil India Limited is a Maharatna Central Public Sector Enterprise under the Ministry of Petroleum and Natural Gas. That does not make this particular engagement a regular government cadre post. It remains a one-year contract at Duliajan.

What are the disadvantages of this contractual electrical engagement?

Here’s the catch: two UR seats, one-year cap, no regularisation claim, self-paid stay in Duliajan, and field work that can be remote, hazardous and on-call. Variable pay falls when you miss working days. Treat it as paid project exposure, not a career ladder.

How much do contract electricians earn in Assam oilfield PSUs?

On this notice, gross pay clusters around ₹40,000–₹50,000 a month before EPF if attendance is strong. That is higher than many private wiring jobs in Upper Assam and lower than regular OIL workperson or executive scales, which also carry housing and longer tenure.

Is an oilfield walk-in worth it for ITI Electrician holders in Assam?

It can be, if you already hold Part I & II and live close enough to hit 07:00 AM registration. You get PSU-site experience, EPF and a documented contract. It is not worth a long interstate trip for a single UR seat with no absorption promise.

Final Checklist – Is This the Right Job for You?

• You are domicile of Assam or Arunachal Pradesh and aged 18–35 as on 07 October 2026.
• You hold the exact licence (Workman’s Permit I & II or Supervisor’s Certificate I–IV) from the Assam/Arunachal Electrical Licensing Board.
• You have two years’ post-qualification electrical experience on paper.
• You accept a 6+6 month contract with no regularisation claim, self-arranged stay, shifts and remote postings.
• You can reach Duliajan Club between 07:00 AM and 09:00 AM on 07 October 2026 with originals and a filled Bio-Data.

📄 Source: Official notification released by Oil India Limited on 23 September 2026 (Advt. No. HRAQ/CONT-WP-B/26-307). All details were sourced from the Oil India official advertisement PDF.