Patent ID: 6325158
Filing Date: 2001-12-04
Classification: E21B

Abstract:
Method for lowering, orienting and securing a manifold having a central hole on a seabed installation comprising a drilling template having a guide hole, a structure having an open boring and being anchored to the seabed; said guide hole, said boring and said central hole adapted to be brought into mutual alignment; and a pipe string arranged to be attached to the manifold for lowering said manifold towards the seabed installation, the method comprising:releasably attaching a tubular tool to the manifold at its central hole and attaching the pipe string to the tubular tool; the tubular tool being aligned with the central hole;inserting a telescopically movable guide rod in the tubular tool;lowering the manifold towards the drilling template;bringing the guide rod into alignment with the guide hole;further lowering the manifold and inserting the guide rod into the guide hole;orienting the manifold into a fixed angular position relative to the drilling template;pushing the guide rod telescopically into the tubular tool;connecting the manifold and the drilling template; andreleasing the tubular tool from the manifold, and lifting the tubular tool away from the manifold with the pipe string.