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{{Copy edit|date=January 2011}}
Subfluvial tunnel ESPO and Lena River it is the engineering object providing crossing by [[Eastern Siberia–Pacific Ocean oil pipeline]] of the [[Lena River]].
'''Subfluvial tunnel ESPO and Lena River''' is the engineering object providing crossing by [[Eastern Siberia–Pacific Ocean oil pipeline]] of the [[Lena River]].


The object is on {{Convert|1755|km|mi}} oil pipeline line, on the river it between a confluence of [[Olyokma River]] and [[Soljanka village]].
The object is on a {{Convert|1755|km|mi}} oil pipeline. On the river it is between a confluence of [[Olyokma River]] and [[Soljanka village]].


== Building method and design ==
== Building method and design ==
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The [[oil pipeline]] is very heavy object, at water crossing them seldom place on [[bridge]]s.
The [[oil pipeline]] is a very heavy object, at water crossing the seldom place on [[bridge]]s.
Builders have initially chosen underground underwater type for this crossing.
Builders have initially chosen underground underwater type for this crossing.
Initial variation of the project has been based on a [[Directional drilling|horizontal drilling technology]], but have decided to build [[сulvert]] under the river later, having laid an oil pipeline in a trench.<ref name="Home straight">{{cite news|url=http://www.vstoneft.ru/analit.php?number=129|title=ВСТО-1: финишная прямая|last=Korpusova|first=Alena|date=2009-04-27|work=Analytics of a route|publisher=[http://www.vstoneft.ru Expert portal] «[[Eastern Siberia–Pacific Ocean oil pipeline|East oil pipeline]]»|language=Russian|accessdate=2009-11-18|location=[[Moscow]], [[Russia]]}}</ref>
Initial variation of the project has been based on a [[Directional drilling|horizontal drilling technology]], but have decided to build [[сulvert]] under the river later, having laid an oil pipeline in a trench.<ref name="Home straight">{{cite news|url=http://www.vstoneft.ru/analit.php?number=129|title=ВСТО-1: финишная прямая|last=Korpusova|first=Alena|date=2009-04-27|work=Analytics of a route|publisher=[http://www.vstoneft.ru Expert portal] «[[Eastern Siberia–Pacific Ocean oil pipeline|East oil pipeline]]»|language=Russian|accessdate=2009-11-18|location=[[Moscow]], [[Russia]]}}</ref>
Line 35: Line 35:
According to engineers Transneft this crossing is unique on [[Operability|reliability of a design]]. Is it is reached at the expense of use of pipes with high safety factor and to increased requirements to quality of metal. In addition [[Pipeline transport#Components|pump stations]] #14 is on the right coast of Lena right after underwater transition ESPO, this measure allows to lower [[pressure]] in a pipe in operation to a minimum.<ref name="Home straight" />
According to engineers Transneft this crossing is unique on [[Operability|reliability of a design]]. Is it is reached at the expense of use of pipes with high safety factor and to increased requirements to quality of metal. In addition [[Pipeline transport#Components|pump stations]] #14 is on the right coast of Lena right after underwater transition ESPO, this measure allows to lower [[pressure]] in a pipe in operation to a minimum.<ref name="Home straight" />


The underwater piece of an oil pipeline is a pipe revetted [[Lath|lining wood lath]]; over it are established pig-iron [[pipeline weight]].<ref name="Home straight" />
The underwater piece of an oil pipeline is a pipe revetted [[Lath|lining wood lath]]; over it are established pig-ironed [[pipeline weight]]s.<ref name="Home straight" />
The design possesses raised reliability at the expense of use of pipes with high safety factor and to increased requirements to [[Steel#Material properties|quality of metal]]:<ref name="endurance trial" />
The design possesses raised reliability at the expense of use of pipes with high safety factor and to increased requirements to [[Steel#Material properties|quality of metal]]:<ref name="endurance trial" />
* The thickness of a wall of a pipe on a site of underwater transition of the main oil pipeline makes {{Convert|29|mm|in}}.
* The thickness of a wall of a pipe on a site of underwater transition of the main oil pipeline makes {{Convert|29|mm|in}}.
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The first attempt to construct crossing has been made in the summer of [[2008]], but the river is up and was astable and has not allowed to perform work.<ref>{{cite news|url=http://www.nvpress.ru/index.asp?id=19090806|title=ВСТО: перехода через Лену в этом году не будет|last=Мунду|first=Сэн|coauthors=Никита Аргылов|date=2008-09-18|work=In time|publisher=[http://www.nvpress.ru/ Наше время]|language=Russian|accessdate=19 November 2009|location=[[Irkutsk]], [[Russia]]}}</ref>
The first attempt to construct crossing has been made in the summer of [[2008]], but the river is up and was astable and has not allowed to perform work.<ref>{{cite news|url=http://www.nvpress.ru/index.asp?id=19090806|title=ВСТО: перехода через Лену в этом году не будет|last=Мунду|first=Сэн|coauthors=Никита Аргылов|date=2008-09-18|work=In time|publisher=[http://www.nvpress.ru/ Наше время]|language=Russian|accessdate=19 November 2009|location=[[Irkutsk]], [[Russia]]}}</ref>


Crossing has been constructed from the end of March on the beginning of April, [[2009]], when [[ice]] on the river has reached the greatest thickness.
Crossing has been constructed from the end of March to the beginning of April [[2009]], when [[ice]] on the river has reached the greatest thickness.
Works on packing of a [[Pipe (material)|pipe]] of an oil pipeline in a [[trench]] have been executed from ice of the Lena River and from [[Pontoon (boat)|pontoon]]s in specially cut through [[ice-hole]] in all width of the river.
Works on packing of a [[Pipe (material)|pipe]] of an oil pipeline in a [[trench]] have been executed from ice of the Lena River and from [[Pontoon (boat)|pontoon]]s in specially cut through [[ice-hole]]s in all widths of the river.
Packing [[Eastern Siberia–Pacific Ocean oil pipeline|ESPO]] has been made for five days by a dragging [[culvert]] method.<ref name="Home straight" />
Packing [[Eastern Siberia–Pacific Ocean oil pipeline|ESPO]] has been made for five days by a dragging [[culvert]] method.<ref name="Home straight" />
Joint commission [[Eastern Siberia–Pacific Ocean oil pipeline|ESPO management company]], "[[Vostoknefteprovod]]", [[Diaskan|Center of technical diagnostics "Diaskan"]] and [[Technical supervision of Russia]] have accepted object on [[25 May|May, 25th]], [[2009]].<ref name="endurance trial" />
Joined commission [[Eastern Siberia–Pacific Ocean oil pipeline|ESPO management company]], "[[Vostoknefteprovod]]", [[Diaskan|Center of technical diagnostics "Diaskan"]] and [[Technical supervision of Russia]] have accepted the object on [[25 May|May, 25th]], [[2009]].<ref name="endurance trial" />


== Notes ==
== Notes ==

Revision as of 02:07, 8 January 2011

Subfluvial tunnel ESPO and Lena River is the engineering object providing crossing by Eastern Siberia–Pacific Ocean oil pipeline of the Lena River.

The object is on a 1,755 kilometres (1,091 mi) oil pipeline. On the river it is between a confluence of Olyokma River and Soljanka village.

Building method and design

Characteristics of underwater transition
Width
Width of Lena River[1] 1,440 metres (4,720 ft)
Culvet length[1] 1,598 metres (5,243 ft)
Total length including coastal sites[1] 3,700 metres (12,100 ft)
Depth
Depth of a bottom from a water level[1] 6.8 metres (22 ft)
Depth of an underwater trench of an oil pipeline from a water level, max[1] 12 metres (39 ft)

The oil pipeline is a very heavy object, at water crossing the seldom place on bridges. Builders have initially chosen underground underwater type for this crossing. Initial variation of the project has been based on a horizontal drilling technology, but have decided to build сulvert under the river later, having laid an oil pipeline in a trench.[2]

According to designers of Transneft, the Special attention at building of underwater crossing is given ecological safety of object. The decision on use open cut river and stream crossing is based on study by experts of Transneft of possible variants of overcoming of a waterway, proceeding from geological and hydrological conditions of a still of Lena River. According to engineers Transneft this crossing is unique on reliability of a design. Is it is reached at the expense of use of pipes with high safety factor and to increased requirements to quality of metal. In addition pump stations #14 is on the right coast of Lena right after underwater transition ESPO, this measure allows to lower pressure in a pipe in operation to a minimum.[2]

The underwater piece of an oil pipeline is a pipe revetted lining wood lath; over it are established pig-ironed pipeline weights.[2] The design possesses raised reliability at the expense of use of pipes with high safety factor and to increased requirements to quality of metal:[1]

  • The thickness of a wall of a pipe on a site of underwater transition of the main oil pipeline makes 29 millimetres (1.1 in).
  • Strength of a used steel above, than at analogues on 15 %.

The first attempt to construct crossing has been made in the summer of 2008, but the river is up and was astable and has not allowed to perform work.[3]

Crossing has been constructed from the end of March to the beginning of April 2009, when ice on the river has reached the greatest thickness. Works on packing of a pipe of an oil pipeline in a trench have been executed from ice of the Lena River and from pontoons in specially cut through ice-holes in all widths of the river. Packing ESPO has been made for five days by a dragging culvert method.[2] Joined commission ESPO management company, "Vostoknefteprovod", Center of technical diagnostics "Diaskan" and Technical supervision of Russia have accepted the object on May, 25th, 2009.[1]

Notes

  1. ^ a b c d e f g "Гидравлические испытания перехода ВСТО через Лену успешно завершены". News (in Russian). Moscow, Russia: ESPO Internet portal. 2009-05-25. Retrieved 19 November 2009.
  2. ^ a b c d Korpusova, Alena (2009-04-27). "ВСТО-1: финишная прямая". Analytics of a route (in Russian). Moscow, Russia: Expert portal «East oil pipeline». Retrieved 2009-11-18. {{cite news}}: External link in |publisher= (help)
  3. ^ Мунду, Сэн (2008-09-18). "ВСТО: перехода через Лену в этом году не будет". In time (in Russian). Irkutsk, Russia: Наше время. Retrieved 19 November 2009. {{cite news}}: External link in |publisher= (help); Unknown parameter |coauthors= ignored (|author= suggested) (help)

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