Patent ID: 11920431
Assignee: INTERWELL NORWAY AS
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 14:
15. A method for installing a production tubing system in a well comprising:
lowering a production tubing comprising a longitudinal through bore into the well,
wherein an initially closed lower valve is located in a lower part of the production tubing,
wherein an upper safety valve is located in an upper part of the production tubing; and
wherein a production tubing sub is located in the production tubing above the lower valve;
allowing well fluid to enter the through bore via a valve assembly secured to an opening of a housing of the production tubing sub during the lowering of the production tubing into the well;
closing the valve assembly by increasing a pressure inside the bore with respect to a pressure outside of the production tubing; and
setting a packer assembly in an annulus outside of the production tubing above the production tubing sub by means increasing the pressure inside the bore.