Pig delivery and transport system for subsea wells

Details Pig delivery and transport system for subsea wells Pig delivery and transport system for subsea wells

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 55/26 (2006.01) B08B 9/04 (2006.01) E21B 33/076 (2006.01) F16L 55/46 (2006.01)

Patent

CA 2268193

A pig delivery and transport system having a looped line (10) is divided into three sections (10A, 10B, 10C). Line section (10A) is a low pressure non-product line extending from a product receiving facility (PF) or host to an upstream shut-off valve (20). Line (10B) is a high pressure product line section extending from downstream shut-off valve (22) to host facility (PF) and receives product from wells (W1 and W2). Intermediate line section (10C) is a connecting line section between shut-off valves (20, 22) to connect the non-product line section (10A) to the product line section (10B). A pig inserted at host (PF) is transported along low pressure non-product line section (10A) into connecting line section (10C) while upstream shut-off valve (20) is open and vent valve (28) is open in vent line (26).

L'invention porte sur un système de distribution et de transport de cochonets comportant une conduite en boucle (10) divisée en trois sections (10A, 10B, 10C). La section (10A) est une conduite non productrice à basse pression reliant une unité réceptrice des produits (PF) ou hôte, à une vanne (20) d'obturation d'amont. La section (10B) est une conduite de production reliant une vanne (22) d'obturation d'aval à l'unité réceptrice (PF) et recevant les produits des puits W1 et W2. La section intermédiaire (10C) est une conduite disposée entre les vannes obturatrices (20, 22) et reliant la section non productrice à la section productrice (10B). Un cochonet introduit au niveau de l'unité hôte (PF) emprunte la section non productrice (10A) à basse pression (10A) puis passe dans la section de raccordement (10C) alors que la vanne obturatrice d'amont est ouverte et qu'une soupape de mise à l'air libre (28) est ouverte dans une conduite (26) à cet effet.

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