Patent ID: 9091137
Filing Date: 2015-07-28
Classification: E21B

Abstract:
1. A method of performing operations in a well from a floating installation through a high pressure riser which is connected to the floating installation through a tension system at a tension connection point, the riser comprising a housing section having an internal diameter larger than an internal diameter of the riser, the housing section being located at the top of the riser and being connected to the floating installation by a low pressure riser section, and the housing section comprising a first connection interface, wherein the method comprises the steps of: making an assembly comprising at least two connectable modules which are configured to perform a desired well operation, at least one of said modules being configured to seal off the high pressure riser at the housing section and the assembly comprising a second connection interface, assembling the assembly at the floating installation, positioning the assembly in the housing section, connecting the second connection interface in the assembly to the first connection interface in the housing section, and performing the desired operation in the well by the use of the assembly.