Sagar Samrat Oil Rig: History, MOPU Conversion & Current Status
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| Sagar Samrat, the historic offshore jack-up drilling rig associated with India’s early offshore exploration in the Mumbai Offshore region. |
This guide explores Sagar Samrat's journey from its 1973 commissioning and early offshore drilling operations to its MOPU conversion, technical capabilities, production role, and current offshore deployment.
Quick Answer: What Is Sagar Samrat?
Sagar Samrat is a historic ONGC offshore drilling rig commissioned in 1973. In 1974, it drilled ONGC’s first offshore well in the Mumbai Offshore region, then known as Bombay High, marking an important milestone in India’s offshore oil exploration. After nearly 32 years of drilling operations, during which it drilled around 125 wells and was associated with 14 key offshore oil and gas discoveries, the rig was converted into a Mobile Offshore Production Unit (MOPU). Production began on 23 December 2022, followed by its formal re-dedication as a MOPU on 28 January 2023. The converted unit was deployed in the WO-16 field for offshore oil and gas production.
What Is Sagar Samrat and Who Owns It?
Sagar Samrat, meaning “Emperor of the Sea,” is a historic offshore drilling rig associated with the Oil and Natural Gas Corporation (ONGC). Commissioned in 1973, it became an important asset in India’s early offshore oil and gas exploration and development activities.
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| Working principle of a jack-up drilling rig: the unit is towed to the location, its legs are lowered to the seabed, and the hull is raised for stable offshore drilling. |
Original Identity: Mobile Offshore Drilling Unit (MODU)
Sagar Samrat was originally built as a self-elevating jack-up drilling rig, a type of Mobile Offshore Drilling Unit (MODU). Unlike a fixed offshore platform, a jack-up rig can be towed between locations. At the drilling site, its legs are lowered to the seabed, and the hull is elevated above the water, providing a stable working platform for offshore drilling.
This mobile configuration enabled Sagar Samrat to undertake exploration and development drilling at different offshore locations during its original operational life.
Current Identity: Mobile Offshore Production Unit (MOPU)
After more than three decades of drilling operations, Sagar Samrat was converted from a drilling unit into a Mobile Offshore Production Unit (MOPU). This conversion changed its primary function from drilling wells to supporting offshore oil and gas production.
As a MOPU, the unit is equipped to handle produced hydrocarbons and support the processing and export of oil and gas from the offshore field. Its conversion represents the reuse of a legacy offshore asset for a new production role.
Who Owns and Operates Sagar Samrat?
Sagar Samrat is an ONGC asset and has been associated with ONGC throughout its offshore drilling and subsequent MOPU operations. ONGC, India’s state-owned oil and gas exploration and production company, has played a central role in its deployment and conversion for offshore production.
The change from a MODU to a MOPU is important because it represents a fundamental change in the unit’s purpose: from drilling and completing offshore wells to supporting the production and handling of hydrocarbons from producing wells.
Where Is Sagar Samrat Located?
Sagar Samrat is situated in the Arabian Sea, within the Mumbai Offshore region of India’s Western Offshore basin, off the western coast of Maharashtra. During its original drilling career, the rig operated at different offshore locations. In its later MOPU configuration, it was deployed in the WO-16 field to support offshore oil and gas production.
Geographical Location & Deployment Site
The key location parameters associated with Sagar Samrat’s MOPU deployment are:
- Marine Basin: Western Offshore Basin, Arabian Sea
- Distance from Mumbai: Approximately 140–145 km west of Mumbai, Maharashtra
- Operating Field: WO-16 field
- Installation: Located adjacent to the WO-16 Well Head Platform (WHP)
- Water Depth: Approximately 76 metres (about 250 feet)
The WO-16 deployment is significant because it allowed the converted Sagar Samrat to be used as an offshore production unit for a cluster of marginal fields. Rather than serving primarily as a drilling unit as it did during its earlier career, the converted MOPU provides production and hydrocarbon-handling capabilities at the field.
Why Is the WO-16 Location Important?
The WO-16 cluster forms part of ONGC’s Western Offshore operations. Its development demonstrates how existing offshore infrastructure can be combined with a converted production unit to support hydrocarbon production from marginal offshore fields.
Sagar Samrat’s deployment also connects two important stages of India’s offshore petroleum history: its earlier role in offshore drilling during the development of the Mumbai Offshore region and its later role as a MOPU supporting oil and gas production in the WO-16 field.
The Historic Journey: History of Sagar Samrat
The history of Sagar Samrat is closely connected with the development of India’s offshore oil and gas industry. From its commissioning in 1973 to more than three decades of drilling operations in the Western Offshore region, the rig became an important asset in ONGC’s offshore exploration and development activities.
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| Sagar Samrat timeline showing its 1973 commissioning, 1974 offshore drilling milestone, long drilling career, and conversion into a MOPU. |
1973: Construction in Japan & Commissioning
Sagar Samrat was constructed in Japan and commissioned in 1973 for offshore drilling operations in India. It was designed as a self-elevating, four-legged jack-up drilling unit, allowing the rig to be moved between offshore locations and positioned for drilling in suitable water depths.
As a jack-up rig, Sagar Samrat could lower its legs to the seabed and raise its hull above the water surface. This configuration provided a stable working platform for drilling while allowing the unit to be relocated when required.
The commissioning of Sagar Samrat represented an important stage in ONGC’s expansion into offshore exploration and development. The rig subsequently became part of the drilling campaign in India’s Western Offshore region.
1974: Sagar Samrat and the First Offshore Well
In 1974, Sagar Samrat drilled ONGC’s first offshore well in the Mumbai Offshore region, then known as Bombay High. The milestone marked an important step in India’s offshore petroleum exploration program.
The early offshore drilling campaign contributed to the development of the Mumbai Offshore region and helped establish the foundation for subsequent exploration and production activities in India’s western offshore areas.
Historical milestone: Sagar Samrat’s 1974 offshore drilling campaign is closely associated with the early development of the Mumbai Offshore petroleum province.
Decades of Offshore Drilling: Wells, Discoveries & Legacy
Sagar Samrat remained in drilling service for approximately 32 years. According to government information, the rig drilled around 125 wells and was associated with 14 key offshore oil and gas discoveries.
During its long drilling career, the rig supported ONGC’s exploration and development activities across India’s offshore fields. Its operational history forms an important part of the development of India’s offshore drilling capability.
| Historical Milestone | Details |
|---|---|
| Commissioned | 1973 |
| Original Type | Self-elevating jack-up drilling rig |
| First offshore well | ONGC's first offshore well, drilled in 1974 |
| Drilling service | Approximately 32 years |
| Wells drilled | Around 125 |
| Key offshore discoveries | 14 |
| Original operating role | Offshore exploration and development drilling |
After completing its long drilling career, Sagar Samrat was selected for conversion into a Mobile Offshore Production Unit (MOPU). This transformation gave the historic rig a new operational role in offshore oil and gas production.
Technical Specifications & Features
Sagar Samrat was originally designed as a self-elevating jack-up drilling rig, allowing it to be towed between offshore drilling locations in India’s Western Offshore region. Following its conversion into a Mobile Offshore Production Unit (MOPU), the unit was reconfigured for offshore oil and gas production rather than well drilling.
Operational Comparison: Original Rig vs. Converted MOPU
| Parameter | Original Sagar Samrat (MODU) | Current MOPU Configuration |
|---|---|---|
| Unit Type | Jack-up drilling rig / MODU | Mobile Offshore Production Unit (MOPU) |
| Primary Function | Offshore exploration and development drilling | Offshore oil and gas production and processing |
| Operator | ONGC | ONGC |
| Commissioned / Redeployed | 1973 | Converted and formally re-dedicated in January 2023 |
| Operating Region | Western Offshore region | WO-16 field |
| Current Water Depth | Variable by drilling location | Approximately 76 metres (about 250 feet) |
| Crude Oil Handling Capacity | Not applicable | Up to 20,000 barrels per day (BOPD) |
| Maximum Export Gas Capacity | Not applicable | Up to 2.36 million m³/day |
| Primary Operational Role | Drilling and well construction | Production and hydrocarbon handling |
Jack-Up Rig Design: Original MODU Phase
In its original drilling configuration, Sagar Samrat operated on the basic principles of a self-elevating jack-up drilling unit.
- Towability: Its buoyant hull allowed the rig to be moved between suitable offshore drilling locations.
- Seabed Support: At the drilling site, its legs were lowered to the seabed to support the unit.
- Elevated Hull: The hull was raised above the water surface, creating a stable working platform for drilling operations.
- Relocation: After completing operations at a location, the hull could be lowered, the legs retracted, and the unit moved to another suitable drilling site.
This configuration allowed Sagar Samrat to support offshore exploration and development drilling while retaining the mobility required for work across different offshore locations.
MOPU Production Capabilities: Current Phase
After its conversion, Sagar Samrat was reconfigured to support offshore oil and gas production. The converted unit has a design oil-handling capacity of up to 20,000 barrels per day (BOPD) and a maximum export gas capacity of approximately 2.36 million cubic metres per day.
The MOPU was deployed in the WO-16 field, adjacent to the WO-16 Well Head Platform (WHP). Its function is fundamentally different from its original drilling role: instead of drilling new wells, the converted unit supports the handling and processing of hydrocarbons produced from offshore wells.
Technical Note on Capacities: The stated oil and gas figures are the unit’s design or maximum handling capacities. They should not be interpreted as its actual daily production rate, which can vary according to field and operating conditions.
The Big Shift: Jack-Up Drilling Rig (MODU) to MOPU Conversion
After approximately 32 years of offshore drilling service, Sagar Samrat underwent a major transformation from a Mobile Offshore Drilling Unit (MODU) into a Mobile Offshore Production Unit (MOPU). The conversion fundamentally changed its operational purpose from offshore well drilling to supporting oil and gas production.
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| Sagar Samrat's transformation from a jack-up drilling rig (MODU) into a Mobile Offshore Production Unit (MOPU) for offshore production. |
Why Was Sagar Samrat Converted into a MOPU?
ONGC repurposed Sagar Samrat for offshore production in the WO cluster, giving the historic unit a new operational role after its long drilling career.
One important objective of the conversion was to support production from marginal offshore fields. Such fields can require different development approaches from large conventional offshore developments, making flexible production solutions useful for bringing smaller hydrocarbon accumulations into production.
The conversion therefore allowed an established offshore asset to be adapted for a new production role rather than limiting its history to its original drilling function.
Engineering Transformation: From Drilling to Production
The fundamental change can be understood through the difference between the two operating roles:
ORIGINAL MODU FUNCTION
Drilling Equipment
↓
Well Construction
↓
Well-Control & Drilling Systems
↓
Offshore Exploration / Development Well
CONVERTED MOPU FUNCTION
Producing Well Fluids
↓
Hydrocarbon Processing & Handling
↓
Oil & Gas Production Support
↓
Export / Field Production System
The conversion required the unit to be adapted for production-related operations and integrated with the offshore field infrastructure.
According to government information, Wood Group’s Mustang business carried out the Front-End Engineering and Design (FEED) work associated with the conversion.
The exact equipment installed or removed during the conversion should be described only where supported by reliable engineering documentation. The important functional change is clear: systems required for offshore drilling were replaced or reconfigured to support the unit’s new production role.
Jack-Up Rig vs. MOPU: Key Differences Explained
Although Sagar Samrat retained its jack-up-based offshore structure, its operational purpose changed substantially after conversion.
| Feature | Original MODU / Jack-Up Rig | Converted MOPU |
|---|---|---|
| Primary purpose | Offshore drilling and well construction | Offshore oil and gas production |
| Core activity | Drilling and completing wells | Handling and processing produced hydrocarbons |
| Primary interface | Drilling and well-control systems | Offshore production and field infrastructure |
| Typical role | Exploration and development drilling | Production support |
| Hydrocarbon function | Supports creation of wells | Handles hydrocarbons from producing wells |
| Sagar Samrat deployment | Various offshore drilling locations | WO-16 field |
From Drilling Workhorse to Production Asset
The significance of the conversion lies in the change in operational purpose. A MODU is primarily designed to drill and support the construction of offshore wells, whereas a MOPU is configured to support the production and handling of hydrocarbons from producing wells.
For Sagar Samrat, this transformation created a second phase in its operational history. The unit moved from its historic role in offshore drilling to a production-oriented role in the WO-16 field, linking its legacy as a pioneering drilling asset with India’s continuing offshore oil and gas development.
How Does Sagar Samrat Operate as a MOPU Today?
In its MOPU configuration, Sagar Samrat no longer functions primarily as a drilling rig. Instead, it supports offshore oil and gas production in the WO-16 field by providing facilities for handling and processing hydrocarbons produced from offshore wells.
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| Sagar Samrat MOPU at the WO-16 field, supporting offshore production from marginal fields in India's Western Offshore region. |
[Producing Wells]
↓
[WO-16 Wellhead Platform]
↓
[Sagar Samrat MOPU]
↓
[Hydrocarbon Processing & Handling]
↓
[Oil & Gas Export System]
1. Production From Offshore Wells
The production process begins with wells developed in the WO-16 field. Fluids produced from these wells can contain a combination of crude oil, natural gas, and produced water.
Unlike its original drilling role, Sagar Samrat does not create these wells in its MOPU configuration. Its production role begins with the handling of fluids produced by the offshore field.
2. Transfer to the MOPU
The produced fluids are transferred through the field's offshore production infrastructure to the facilities associated with the Sagar Samrat MOPU.
The converted unit was deployed adjacent to the WO-16 Well Head Platform (WHP) in approximately 76 metres of water depth, allowing it to form part of the field's offshore production system.
3. Hydrocarbon Processing and Handling
Once the produced fluids reach the production facilities, they are handled and processed so that the different hydrocarbon streams can be managed for production and export.
The main streams include:
- Crude oil: The principal liquid hydrocarbon product.
- Natural gas: Separated and handled for export or other field requirements.
- Produced water: Managed as part of the offshore production process.
The exact processing sequence and equipment configuration depend on the field and facility design. Therefore, individual equipment such as separators, compressors, pumps, or treatment systems should only be attributed specifically to Sagar Samrat where supported by engineering documentation.
4. Oil and Gas Handling Capacity
The converted Sagar Samrat MOPU was designed to handle up to 20,000 barrels of oil per day (BOPD) and a maximum export gas capacity of approximately 2.36 million cubic metres per day.
These figures represent the unit's design or maximum handling capacities, not necessarily its actual daily production or throughput.
Actual production can vary depending on well performance, reservoir conditions, field operating requirements, equipment availability, and the associated offshore production network.
5. How Its Role Changed After Conversion
The difference between Sagar Samrat's original and current roles can be summarized as follows:
| Operational Dimension | Original Drilling Role | Current MOPU Role |
|---|---|---|
| Primary mission | Drilling and supporting offshore wells | Supporting offshore oil and gas production |
| Main function | Well construction and drilling operations | Hydrocarbon handling and production support |
| Subsurface interface | Drill string and well-control systems | Producing wells and field production infrastructure |
| Hydrocarbon role | Supports well creation rather than production | Handles hydrocarbons produced from wells |
| Operational purpose | Exploration and development drilling | Production support in the WO-16 field |
The key point is simple: Sagar Samrat's original job was to help drill offshore wells; its MOPU role is to support the production and handling of hydrocarbons from producing wells. This functional transformation is the central engineering significance of its conversion.
Sagar Samrat Current Status
Sagar Samrat’s operational identity today is that of a Mobile Offshore Production Unit (MOPU) rather than its original role as a jack-up drilling rig. The converted unit commenced production on 23 December 2022 and was formally re-dedicated as a MOPU on 28 January 2023.
Current Deployment at WO-16
According to government information, Sagar Samrat was deployed in the Western Offshore (WO)-16 field in the Arabian Sea.
Key deployment details include:
- Operating Field: Western Offshore (WO)-16 field
- Distance from Mumbai: Approximately 140–145 km west of Mumbai
- Installation: Located adjacent to the WO-16 Well Head Platform (WHP)
- Water Depth: Approximately 76 metres (about 250 feet)
The MOPU was intended to support hydrocarbon production from marginal fields in the WO cluster, giving the converted unit a new role within India’s Western Offshore production system.
Production and Handling Capacity
The converted MOPU was designed with the following handling capacities:
- Crude Oil: Up to 20,000 barrels per day (BOPD)
- Export Gas: Up to 2.36 million cubic metres per day
Note on Capacities: These figures represent the unit’s design or maximum handling capacities, not a guaranteed daily production rate. Actual throughput can vary according to well performance, reservoir conditions, field requirements, and operating conditions.
Current Status: Key Parameters at a Glance
| Status Parameter | Verified Information |
|---|---|
| Current Configuration | Mobile Offshore Production Unit (MOPU) |
| Production Commenced | 23 December 2022 |
| Formal Re-dedication | 28 January 2023 |
| Field Deployment | WO-16 Field, Western Offshore |
| Distance from Mumbai | Approximately 140–145 km west |
| Operating Water Depth | Approximately 76 metres (~250 feet) |
| Crude Oil Design Capacity | Up to 20,000 BOPD |
| Maximum Export Gas Capacity | Up to 2.36 million m³/day |
| Primary Role | Offshore production support for the WO cluster |
Is Sagar Samrat Still a Drilling Rig?
No. In its current configuration, Sagar Samrat is a MOPU rather than an active drilling rig. Its operational role changed from offshore well drilling to supporting oil and gas production after the conversion.
This distinction is important: the historic Sagar Samrat was a jack-up MODU, while the converted unit serves as a MOPU associated with offshore production in the WO-16 field.
What Does Its Current Status Signify?
Sagar Samrat is a notable example of how an established offshore drilling asset can be adapted for continued use in offshore oil and gas production. After serving as a jack-up drilling rig for about 32 years, it was converted into a Mobile Offshore Production Unit (MOPU). The conversion enabled Sagar Samrat to move from its earlier drilling role to a production role at the WO-16 field in India’s Western Offshore region. Its MOPU operation began in December 2022, marking a new phase in the long operational history of this iconic offshore unit.
Strategic Importance & Legacy of Sagar Samrat
The significance of Sagar Samrat goes beyond its long operational history. Its drilling career is closely associated with the early development of India’s offshore oil and gas industry, while its later conversion into a Mobile Offshore Production Unit (MOPU) demonstrates how an established offshore asset can be adapted for a new production role.
Role in India’s Offshore Oil Development
Sagar Samrat played an important role during the early phase of India’s offshore exploration. In 1974, it drilled ONGC’s first offshore well in the Mumbai Offshore region, then known as Bombay High. Over approximately 32 years of drilling service, the rig drilled nearly 125 wells and was involved in 14 key offshore oil and gas discoveries, according to Government of India information.
Its history is therefore closely connected with the expansion of India’s offshore exploration and production capabilities. However, it is more accurate to describe Sagar Samrat as an important contributor to this development rather than attributing the entire development of Mumbai Offshore to a single rig.
Contribution to Domestic Hydrocarbon Production
The importance of Sagar Samrat continued after its drilling career. Following conversion into a MOPU, the unit was deployed in the WO-16 field in the Western Offshore region.
The Government of India stated that the converted MOPU would support production from marginal fields in the WO cluster, thereby contributing to additional production from the Western Offshore region. It was designed to handle up to 20,000 barrels of crude oil per day and has a maximum export gas capacity of approximately 2.36 million cubic metres per day.
These figures represent the unit's design and maximum handling capacities, not a guaranteed or continuous production rate.
Offshore Engineering & Institutional Legacy
Sagar Samrat also represents the evolution of offshore engineering capabilities associated with India's petroleum sector.
Its original configuration as a jack-up drilling rig allowed it to support offshore well drilling at different locations. Decades later, the same asset was technically transformed into a production-oriented MOPU.
The conversion required engineering and design work for its new operational role. Government information states that Wood Group's Mustang unit in Texas carried out the front-end engineering and design (FEED) for the conversion.
Legacy Asset Repurposing
One of the most notable aspects of Sagar Samrat's later history is its transition from drilling to production.
Instead of ending its story with its original drilling role, the unit was converted and brought into production service. The MOPU commenced production on 23 December 2022 and was formally re-dedicated on 28 January 2023.
This makes Sagar Samrat a useful example of offshore asset repurposing: an established drilling unit was adapted for a different function and deployed in a new field-development context.
Why Sagar Samrat Matters
Sagar Samrat's legacy can therefore be understood through two distinct phases:
| Phase | Contribution |
|---|---|
| 1973–Drilling Career | Supported India's early offshore exploration and development activities |
| 1974 Milestone | Drilled ONGC's first offshore well in the Mumbai Offshore region |
| Long Drilling Career | Nearly 125 wells and involvement in 14 key offshore oil & gas discoveries |
| MOPU Conversion | Repurposed the jack-up rig for offshore production |
| WO-16 Deployment | Supports production from marginal fields in the WO cluster |
| Second Operational Life | Demonstrates reuse of an established offshore asset for a new production role |
Sagar Samrat's story is therefore not only about a historic drilling rig. It is also about the development of India's offshore petroleum industry and the continued use of established offshore infrastructure through engineering conversion and asset repurposing.
Fascinating Facts About Sagar Samrat
Sagar Samrat's long history includes several milestones that connect India's early offshore oil exploration with its later role in offshore production.
1. Built in Japan
Sagar Samrat was built at the Mitsubishi yard in Japan and set sail from Hiroshima on 3 April 1973. It was commissioned in 1973 for offshore drilling operations in India.
2. Drilled ONGC's First Offshore Well
In 1974, Sagar Samrat drilled ONGC's first offshore well in the Mumbai Offshore region of the Arabian Sea, then known as Bombay High. This was an important milestone in the development of India's offshore exploration activities.
3. Approximately 125 Wells and 14 Key Discoveries
During approximately 32 years of drilling operations, Sagar Samrat drilled nearly 125 wells and was involved in 14 key offshore oil and gas discoveries in India, according to Government of India information.
4. From Jack-Up Drilling Rig to MOPU
Sagar Samrat originally operated as a jack-up drilling rig. After its drilling career, the unit was converted into a Mobile Offshore Production Unit (MOPU).
The Front-End Engineering and Design (FEED) for the conversion was carried out by Wood Group's Mustang unit based in Texas.
5. Production Commenced in December 2022
The converted Sagar Samrat MOPU commenced production on 23 December 2022. It was subsequently formally re-dedicated as a MOPU on 28 January 2023.
6. Featured on India's One-Rupee Currency Note
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| Sagar Samrat featured on the reverse of India’s ₹1 note, including the 2017 design issued by the Government of India. |
- 1980s Currency Heritage: During the 1980s, the ₹1 note featured an oil-rig motif as part of a wider series of designs representing technological and industrial progress. Historical ₹1 notes from this period show the Sagar Samrat offshore oil-rig design.
- ₹1 Note Issuance Until 1994: The Government of India continued issuing ₹1 paper notes until 1994. The ₹1 paper note was later reintroduced with a new design in 2017.
- 2017 Design: The ₹1 note issued in 2017 again featured Sagar Samrat, the oil exploration platform, on its reverse side. The official 2017 design documentation identifies Sagar Samrat as part of the reverse-side artwork.
Why Is This Significant?
Sagar Samrat’s appearance on the ₹1 note connects an important chapter of India’s offshore petroleum history with the country’s currency heritage. Its presence on ₹1 notes across different periods makes the rig notable not only in offshore exploration history but also in India’s visual record of technological and industrial development.
Important Historical Note
The 2017 ₹1 note was not the first appearance of the Sagar Samrat image on Indian currency. The oil-rig motif was already associated with ₹1 notes during the 1980s. The significance of the 2017 issue is that the official design documentation specifically identifies the reverse-side image as Sagar Samrat, the oil exploration platform.
7. A Second Operational Life
After its long drilling career, Sagar Samrat was repurposed as a MOPU and deployed at the Western Offshore (WO)-16 field, approximately 140–145 km west of Mumbai.
The unit is positioned adjacent to the existing WO-16 Well Head Platform (WHP) in approximately 76 metres of water depth and is intended to support production from marginal fields in the WO cluster.
Sagar Samrat at a Glance
| Milestone / Parameter | Historical Record |
|---|---|
| Year Commissioned | 1973 |
| Construction Yard | Mitsubishi Yard, Japan |
| Departure from Japan | 3 April 1973 sailed from Hiroshima |
| First Offshore Well | ONGC's first offshore well, 1974 |
| Historical Region | Mumbai Offshore, then known as Bombay High |
| Active Drilling Career | Approximately 32 years |
| Wells Drilled | Nearly 125 wells |
| Key Offshore Discoveries | 14 |
| Original Configuration | Jack-up Drilling Rig |
| Current Configuration | Mobile Offshore Production Unit (MOPU) |
| MOPU Production Commenced | 23 December 2022 |
| Formal MOPU Re-Dedication | 28 January 2023 |
| MOPU Deployment | WO-16 Field |
| Approx. Distance from Mumbai | 140–145 km west |
| Water Depth | Approximately 76 metres |
| Currency Feature | Currency Feature: Featured on ₹1 notes, including the 2017 design |
Sagar Samrat therefore represents two distinct phases of India's offshore petroleum history: its early role in offshore drilling and its later transformation into a production-oriented MOPU.
Frequently Asked Questions (FAQs)
What is Sagar Samrat?
Sagar Samrat is a historic offshore drilling unit associated with the Oil and Natural Gas Corporation (ONGC). Commissioned in 1973 as a jack-up drilling rig, it played an important role in India's early offshore exploration. After approximately 32 years of drilling operations, it was converted into a Mobile Offshore Production Unit (MOPU) for offshore oil and gas production.
When did Sagar Samrat start offshore drilling?
Sagar Samrat was commissioned in 1973. In 1974, it drilled ONGC's first offshore well in the Mumbai Offshore region of the Arabian Sea, then known as Bombay High.
Where is Sagar Samrat located now?
In its MOPU configuration, Sagar Samrat is deployed in the Western Offshore (WO)-16 field, approximately 140–145 km west of Mumbai. It is located adjacent to the existing WO-16 Well Head Platform (WHP) in approximately 76 metres of water depth.
Is Sagar Samrat still a drilling rig?
No. Sagar Samrat was converted from its original jack-up drilling rig configuration into a Mobile Offshore Production Unit (MOPU). Its current documented role is associated with offshore oil and gas production rather than drilling new wells.
Why was Sagar Samrat converted into a MOPU?
After approximately 32 years of drilling operations, Sagar Samrat was repurposed to support production from marginal fields in the WO cluster. The conversion gave the established offshore asset a new production-oriented role.
When did Sagar Samrat become a MOPU?
The converted Sagar Samrat MOPU commenced production on 23 December 2022. It was formally re-dedicated as a MOPU on 28 January 2023.
How many wells did Sagar Samrat drill?
During its approximately 32-year drilling career, Sagar Samrat drilled nearly 125 wells and was involved in 14 key offshore oil and gas discoveries in India, according to Government of India information.
What is the production capacity of the Sagar Samrat MOPU?
The Sagar Samrat MOPU was designed with the following capacities:
- Crude oil: Up to 20,000 barrels per day (BOPD)
- Maximum export gas: Approximately 2.36 million cubic metres per day (MCM/day)
These are design or maximum handling capacities, not guaranteed actual daily production rates.
Who operates Sagar Samrat?
Sagar Samrat is associated with ONGC's Western Offshore operations. Government of India information identifies the unit as an ONGC asset and describes its deployment in the WO-16 field.
Why is Sagar Samrat important in Indian oil history?
Sagar Samrat is significant because it was involved in ONGC's first offshore well in 1974 and subsequently drilled nearly 125 wells and participated in 14 key offshore oil and gas discoveries. Its later conversion into a MOPU also gave the historic drilling unit a new role in offshore production.
Conclusion
Sagar Samrat stands as an important part of India's offshore petroleum history. Commissioned in 1973, the self-elevating jack-up drilling rig played a significant role in India's early offshore exploration and, in 1974, drilled ONGC's first offshore well in the Mumbai Offshore region, then known as Bombay High.
Across approximately 32 years of drilling operations, Sagar Samrat drilled nearly 125 wells and was involved in 14 key offshore oil and gas discoveries in India.
Rather than ending its operational history after its drilling career, Sagar Samrat entered a new phase through its conversion into a Mobile Offshore Production Unit (MOPU):
- Asset Transformation: Converted from a jack-up drilling rig into a Mobile Offshore Production Unit (MOPU).
- Production Re-deployment: Commenced production on 23 December 2022 and was formally re-dedicated as a MOPU on 28 January 2023.
- Current Documented Deployment: Deployed at the WO-16 field, approximately 140–145 km west of Mumbai, adjacent to the WO-16 Well Head Platform in about 76 metres of water depth.
Sagar Samrat's journey from an early offshore drilling rig to a production-oriented MOPU illustrates the changing role of offshore infrastructure in India's petroleum sector. Its long drilling history and subsequent conversion make it a notable example of an offshore asset being adapted for a new operational purpose.
