Rig: Stena Don

Name Stena Don
Owner Stena Don Cyprus Limited
Manager Stena Drilling Ltd.
Rig Type Semisub
Sub Type Midwater Floater
Jackup Type --
Max Water Depth (ft) 1640
Max Drill Depth (ft) 27800
Dimensions (ft) 236 x 219 x 109
Leg Length (ft) --
Competitive Yes

Current Location

Country UK
Region NWECS

Drilling Equipment

Drawworks Type --
Drawworks HP --
Mud Pumps Type Continental Emsco FC-2200 Triplex
Top Drive National Oilwell Varco HPS-750
Hookload Capacity (lbs) 1322770

Rig Construction Details

Rig Design Kvaerner Maritime
Rig Model CS 30
Year Built 2001
Country of Build Germany
Yard Name Kvaerner Warnow Werft Shipyard
Group Yard Name Kvaerner Warnow Werft GmbH

Rig Contract Details

Operating Status Operational
Operator Cairn Energy

Rig Images

News

17 Nov 2016

Stena Don Stacked in Norway

Stena Drilling has selected Semco Maritime’s facilities at Hanøytangen for a warm stacking of the offshore drilling rig Stena Don. The rig will be warm stacked at the Hanøytangen yard in Bergen, ready for future work, explains Business Development Manager Øistein Tømte, Semco Maritime. Stena Don arrived at the yard 16 November and has previously been on a contract in the Troll field in the Norwegian sector of the North Sea. Stena Don is a class 3 semi-submersible rig built in 2001, and has recently been upgraded with a modern equipment package. The harsh environment rig is suitable for drilling, completion and workover operations worldwide. “Hanøytangen’s facilities include both wet dock and dry dock, which are tailored for assignments such as this where a rig arrives for a brief stopover, a Compliance Renewal survey or large-scale upgrade work before returning to operations,” says Øistein Tømte. The well-equipped dock facilities at Hanøytangen comprise several dock areas, including a dry dock of 116x125 meters and quay areas with depths of at least 100 meters. The dockyard is fitted with modern equipment for repair and handling of rigs, rig gear and other very large elements on water and land, including crane capacity at all docking areas.

7 Apr 2016

The PSA has given Statoil consent to use the Stena Don mobile drilling facility for drilling and completion of wells 35/11-B-22 and B-13

Stena Don is operated by Stena Drilling, and is a Sonat/Hitachi-designed, semi-submersible drilling facility, built in 2001. The facility received Acknowledgement of Compliance (AoC) in March 2002. Fram is an oil field in the northern North Sea around 20 kilometres north of Troll. Water depth in the area is around 350 metres. The Petroleum Safety Authority Norway has now granted consent to use Stena Don on the Fram field in accordance with Statoil's application.

28 Jun 2010

Contracting the Stena Don drilling rig

Statoil has signed a three-year contract with Stena Drilling for hire of the Stena Don drilling rig. The contract value is USD 437 million over a period of three years. Plans call for the semi-submersible rig to be used for drilling on the Norwegian continental shelf (NCS). The rig was also under contract with Statoil from 2001 to December 2009. “We have long experience with Stena Don, and we look forward to continuing the cooperation with this rig,” says Anders Opedal, head of procurements in Statoil. The schedule of work for the rig is being considered by relevant licences on the NCS. The rig will play an important role in Statoil’s efforts to reach its NCS production targets.

17 Oct 2006

Brugdan not commercial

Drilling by Statoil as operator of well 6104/21-1 in licence 006 off the Faroe Islands has been completed. No commercially viable oil or gas volumes were proven. The well was drilled by the Stena Don rig to a total depth of 4,201 metres in roughly 480 metres of water. Only traces of gas were found in the structure. "We are obviously disappointed that the drilling did not reveal commercial volumes of hydrocarbons, " says Rúni M Hansen, vice president for Statoil Færoyene. "A positive aspect is that the well has given us useful knowledge about drilling in volcanic sub-basalt rock. That will be helpful in future exploration off the Faroes. Originally, the plan was to drill down to 3,780 metres but Statoil applied for permission to drill deeper. Due to technical problems, the well had to be abandoned early. The well has now been permanently plugged and abandoned. Cores from the well will be thoroughly examined to gather information for future exploration. According to Bjarni Djurholm, trade and industry minister for the Faroes, the well is an important source of knowledge about the geology below the sub-basalt rocks on the Faroese continental shelf. "Preparations for the third Faroese licensing round are under way," says Mr Djurholm. "I expect it to be announced in the autumn of 2007 as scheduled." The partners in licence 006 are Statoil with 27.15%, Dong (21.91%), Anadarko (13%), Enterprise Oil (Shell) (12.47%), Amerada Hess (11.09%), BG group (10.31%), Faroe Petroleum (4.04%) and Atlantic Petroleum (0.03%).

17 Jul 2006

Stena contract extended

A charter with Stena Drilling for the Stena Don semi-submersible has been extended by Statoil for three years plus a one-year option. Worth a total of just under NOK 4 billion, including the option, this contract will come into effect in December. “The rig market is tight because of the high level of exploration on the Norwegian continental shelf,” observes Gunnar G Opsahk, sub-surface head for the Halten/Nordland business cluster. “Extending our charter with Stena Drilling secures us access to rig capacity for our drilling and completion activities for a long time to come.” Plans call for Stena Don to drill wells on the Heidrun, Norne and Åsgard wells in the Norwegian Sea.

8 Dec 2005

New wildcat off the Faroes

A sub-basalt exploration well is to be drilled by Statoil on the Brugdan prospect in licence 006 off the Faroe islands next summer. This operation will be carried out by the semi-submersible Stena Don, which is currently on charter to Statoil in Norway. The partners in licences 003 and 001, operated by Statoil and Amerada Hess respectively, have signed an agreement to farm into the Statoil-operated 006 licence. They have been allowed by the Faroese Petroleum Administration to offset their drilling commitments in licences 003 and 001 by participation in the planned wildcat. “We’re very satisfied to have reached agreement with our partners and the Faroese authorities on drilling this well,” says Gregory T Himes. He is Statoil’s vice president for the former Soviet Union and Europe in the global exploration cluster of the International Exploration & Production business area. "The Brugdan prospect has provided a real technical challenge for the explorationists trying to interpret beneath very thick sections of volcanic rock," says Mr Himes. This drilling target is about 70 kilometres from the nearest well discovery, Rosebank, but he emphasises that the geology could be completely different. Statoil has a 30 per cent interest in Rosebank, which is operated by Chevron. The Brugdan well will be drilled to a total depth of about 3,780 metres below sea level, in roughly 450 metres of water. Statoil has 27.15 per cent of licence 006, which is one of its four operatorships on the Faroese continental shelf. Its partners in licence 006 are DONG with 21.91 per cent, Anadarko 13 per cent, Enterprise Oil (Shell) 12.47 per cent, Amerada Hess 11.09 per cent, BG group 10.31 per cent, Faroe Petroleum 4.04 per cent and Atlantic Petroleum 0.03 per cent.

5 Jul 2005

Additional resources to Åsgard

Operator Statoil has completed drilling an exploration well at the Yttergryta prospect on the Norwegian Sea's Halten Terrace. Well 6507/11-8, which lies in production licence 062 around one kilometre east of the Midgard field, was proven to hold gas in sandstones of Jurassic age. It was drilled to a total depth of 2,749 metres below sea level and halted in early Jurassic rocks. Due to be completed in 2008, it was drilled as a combined exploration and production well and temporarily plugged. "The well is promising since additional resources were proven in a new structure, thus increasing the hope of further gas finds in the area close to the Midgard field," says Frode Fasteland, acting head of production on the Norwegian continental shelf. "To ensure the quickest possible development, considerable pre-investments have been made, including the installation of a subsea template and preparations for a future gas pipeline to Midgard in advance of the well coming into production." The Stena Don drilling rig drilled the well in a water depth of 297 metres. Statoil is operator for production licence 062 with a 31.1% interest. Other licensees are Total with 24.5%, Hydro (14.7%) and Eni (9.8%).

1 Aug 2003

Duster on Graspett

A wildcat on Statoil’s Gråspett prospect in the Norwegian Sea has been completed without encountering signs of oil. Drilled on behalf of production licence 128, covering blocks 6608/10 and 6608/11, the well lies 175 kilometres off northern Norway and three kilometres north-east of Statoil’s Norne field. It was drilled in 374 metres of water to a total measured depth of 2,750 metres below sea level and terminated in Jurassic rocks. No hydrocarbons were found in the relevant sandstones. Statoil has previously made discoveries in the Stær, Falk, Lerke and Svale structures in the same area, but none of these is large enough to support a stand-alone development. “The Gråspett wildcat has played its part in clarifying the resource position around Stær and Svale,” explains section manager Roger Inge Johansen in the Halten/Nordland cluster. “Failure to make a discovery with this well does not affect assessments of developing these finds and tying them back to the Norne production ship.” In addition to Statoil, with 40.455 per cent, partners in PL 128 are Petoro with 24.545 per cent, Norsk Hydro 13.5 per cent, Norsk Agip 11.5 per cent and Shell/Enterprise 10 per cent.

18 Jul 2003

Drilling on Graspett

A wildcat has been spudded on Statoil’s Gråspett oil prospect in the Norwegian Sea, and should take about a month to complete. The well is being drilled from Stena Don on behalf of the partners in production licence 128. Gråspett lies in block 6608/10 close to Statoil’s Norne field. The group has previously found oil in the nearby Stær, Falk, Lerke and Svale structures, but none of these is large enough to support a stand-alone development. “We’re considering various solutions for phasing the finds into the Norne production ship,” explains Knut Chr Grindstad, vice president for exploration in Halten/Nordland. “One option is to link them in a cluster with a shared tie-in to the vessel. We have hopes for the Gråspett wildcat, where a discovery would strengthen the prospects for such a solution.” Preliminary plans call for well 6608/10-10 to be drilled to a total depth of 2,800 metres. In addition to Statoil with 40,455 per cent, the partners in PL 128 are Norsk Hydro with 13.500 per cent, Norsk Agip 11,500 per cent, Shell/Enterprise 10 per cent and Petoro 24,545 per cent.

17 Dec 2002

Dry in Blåmeis

No hydrocarbons were encountered with an exploration well drilled by Statoil on the Blåmeis prospect in the Norne area of the Norwegian Sea. “This well was drilled in a prospect with a large oil potential, but which was also regarded as high risk,” says Roger Inge Johansen, exploration manager for the area. “So the result wasn’t very surprising. But we’re disappointed all the same.” The 6608/11-3 wildcat was drilled in production licence 128, about 15 kilometres east of Statoil’s Norne field, with the aim of proving oil in Jurassic sandstones. Drilling terminated at a depth of roughly 2,000 metres, in Triassic sediments. PL 128 embraces blocks 6608/10 and 11, where earlier discoveries include Stær, Svale and Falk as well as Norne. The well was drilled by Stena Don in 21 days – about a week faster than planned. “This rig has once again done a very efficient job, and the operation was implemented without accidents to people or material assets,” says Mr Johansen. The results of this well will have no impact on the future exploration programme in the Norne area. Two new wildcats have been approved by the licensees. They will be on the Lerke and Gråspett prospects, and are due to be spudded in the first half of 2003.

26 Nov 2002

Wildcat spudded on Blåmeis

The first exploration well on Statoil’s Blåmeis prospect in the Norwegian Sea was spudded on 26 November by Stena Don, and is expected to take about a month to complete. This structure is thought to contain oil, reports Knut Chr Grindstad, exploration vice president for the Halten/Nordland cluster in the north Norwegian port of Harstad. Blåmeis is close to the group’s existing Norne field, in an area where Statoil has already found oil in a series of structures named after birds – Stær (Starling), Falk (Falcon) and Svale (Swallow). None of these discoveries is large enough to support a stand-alone development. Statoil is accordingly considering various options, which include coming up with technology that could make it easier to tie back small finds to Norne’s production ship. Developing these discoveries as a cluster will also improve their economics. The Norne vessel is due to go off plateau in 2003, and needs additional oil to maintain production levels. Great expectations are attached to the Blåmeis wildcat. Mr Grindstad says that a possible oil discovery could also be tied back to Norne. Should the most optimistic hopes be borne out by the well, however, the field could become a stand-alone development. Possible Blåmeis oil is expected to be heavier than Norne crude, but this will not be known until drilling has been completed and its results analysed. Plans call for the well to be drilled to a depth of about 2,000 metres.

23 Sep 2002

Drilling on Tyrihans South

Statoil spudded an appraisal well on the Tyrihans South find in the Norwegian Sea on 21 September. The Stena Don semi-submersible rig is carrying out the drilling, which is expected to take about one and a half months. “We hope to prove additional oil and gas reserves on Tyrihans South,” reports Knut Christian Grindstad, vice president in the Halten/Nordland exploration unit in Harstad. Gas and oil have already been proven in Tyrihans South and North respectively, in 1983 and 1984. The blocks in which these finds have been proven lie in production licences 073 and 091, and are situated 40 kilometres south of the Asgard field. Water depth is about 285 metres. The well on Tyrihans South will be drilled to between 3,000 and 4,000 metres depth. “We consider Tyrihans to be an Åsgard satellite, and are contemplating direct subsea tie-back to existing infrastructure on Åsgard,” confirms Mr Grindstad. Timing of the development will depend on available capacity in the infrastructure and the solution chosen for the sale of the gas. Licensees in production licence 091 are operator Statoil with 55 per cent, Norsk Hydro (33) and ExxonMobil (12). Licensees in production licence 073 are operator Statoil with 54.67 per cent, TotalFinaElf (33.33) and Norsk Hydro (12). Stena Don is one of the world’s most modern drilling rigs. Its features include dynamic positioning, which maintains the correct position without the use of anchors. The rig arrived on Tyrihans from an operation on the Statoil operated Norne field. It will also drill the first exploration well on the Blameis structure east of the Norne field later this autumn.

19 Apr 2002

Oil find near Norne

An oil discovery has been made by Statoil in the Stær structure close to the group’s Norne field in the Norwegian Sea. The find could contribute to a unitised development of several reservoirs in the area. Its commerciality will now be assessed. Stær lies about three kilometres north-east of the Norne production ship, and its oil quality is similar to that in the other field. “This is particularly interesting because we’ve previously made discoveries in the Svale and Falk structures,” says exploration manager Roger Inge Johansen in the Halten/Nordland business cluster. “Stær is accordingly very important for achieving a unitised development of finds in the Norne area.” Exploration well 6608/10-8 in production licence 128 was drilled vertically from the Stena Don rig to a total measured depth of 2,660 metres, and terminated in early Jurassic rocks. A sidetrack, 6608/10-8A, was also drilled 600 metres out from the vertical well to clarify the size of the field. This had a total measured depth of roughly 2,600 metres below the seabed. Stena Don has also been chartered to drill a well in the Blåmeis structure east of Norne this summer.

21 Dec 2001

Taking over Stena Don

Statoil has taken over the new drilling rig, Stena Don. The five-year operations contract with the Stena Drilling shipping company is thereby realised. Stena Don has received the approval of the Norwegian Petroleum Directorate and Statoil, and is today, 21 December, leaving the Offshore & Marine shipyard in Sandnes en route to the Halten Bank. To begin with the rig will be operating in the Norne area, and the first well will be drilled on the Stær prospect. The rig should be in position on the field on Monday. This rig is one of the most modern drilling rigs in the world. It has a dynamic positioning system, which means that it can hold its position without the use of anchors. It can therefore be moved quickly from one drilling location to another without the risk of coming into conflict with subsea facilities.

22 Oct 2001

Stena Don heading north

Statoil will use the state-of-the-art drilling rig Stena Don on the Halten Bank when the rig is handed over from Stena Drilling this autumn. The rig will be used to drill exploration and production wells in the area in the course of next year. Stena Don’s first assignment will be to drill an exploration well in the Stær prospect near the Svale find. The drilling programme for the rig has only been clarified for the first year, but Statoil plans to contract Stena Don for five years. The rig will also be used for maintenance of subsea wells, reports Arne Jacobsen, project manager in the rig management unit in Exploration & Production Norway. The contract is an important step in the modernisation of Statoil’s rig portfolio: This rig represents a new generation of drilling and completion rigs. It has a dynamic positioning system, which means that it can hold its position without the use of anchors. It can therefore be moved quickly to a new location without the risk of coming into conflict with subsea equipment,” says Mr Jacobsen. Stena Don was named in a ceremony at the Offshore & Marine yard in Sandnes on Saturday 20 October.

20 Aug 2001

Stena Don coming to Sandnes

The drilling rig Stena Don, which has been contracted by Statoil, is en route from the Kværner shipyard in Warnow, Germany, to the Offshore & Marine yard in Sandnes. The newbuilding left Warnow on Saturday 18 August, and will take around 7 to 10 days to complete the journey. Stena Don will be fitted with bow propellers and be tested in the Gands Fjord near Sandnes, south of Stavanger. Statoil has entered a five-year contract with Stena Drilling and expects the rig to be handed over sometime in the autumn. It has not yet been decided where the rig will operate. The rig is being transported on a barge until it has cleared the Øresund bridge between Sweden and Denmark. It will then be taken off the barge and towed to Sandnes, reports project manager Arne Jacobsen in Statoil's rig management unit. Stena Don is one of the latest generation of rigs. It is equipped with dynamic positioning and will not get in the way of flowlines or pipelines. The rig will therefore be very efficient, adds Mr Jacobsen. Stena Don can be used for most operations within exploration and production drilling, including well maintenance. It has been constructed to operate in winter conditions in northern waters.

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