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

Claim 11:
12. A production tubing system for a well, comprising:
a production tubing comprising a through bore in a longitudinal direction;
a tubing hanger for hanging off the production tubing in the well;
an upper safety valve located in an upper part of the production tubing;
a first, lower valve located in a lower part of the production tubing; and
a packer assembly for closing of an annulus outside of the production tubing above the lower valve;
wherein the system further comprises:
a production tubing sub located in the production tubing above the lower valve, the production tubing sub comprising:
a housing comprising a longitudinal through bore, wherein the longitudinal through bore is configured to be provided in fluid communication with the through bore of the production tubing;
an opening provided radially in the housing; and
a valve assembly secured to the opening of the housing.