Ring member for a swellable downhole packer

A ring member for a downhole assembly, the ring member configured to cooperate with a swellable member disposed on a body of an apparatus,

• wherein the swellable member comprises a material selected to expand on exposure to at least one triggering fluid;
• and
• wherein the ring member is further configured to be secured to the apparatus via a coupling arrangement which couples the body and a well string section.

An apparatus configured to form part of a well string, the apparatus comprising:

• a body having a swellable member disposed thereon, wherein the swellable member comprises a material selected to expand on exposure to at least one triggering fluid, and wherein the body is configured to be coupled to a well string section by a coupling arrangement;
• and
• a ring member configured to cooperate with the swellable member and be secured to the well string via the coupling arrangement.

A well string sub assembly configured to form part of a well string, the sub assembly comprising:

• a first end comprising a first coupling configured to be connected to the body of a swellable apparatus;
• and
• a second end comprising a second coupling configured to be connected to a well string section, wherein the sub assembly is configured to cooperate with a swellable member of the swellable apparatus.

A ring member for a well string comprising a swellable apparatus, the ring member comprising:

• a body configured to be secured to an upstanding formation on a well string;
• wherein the ring member is configured to cooperate with a swellable member of the swellable apparatus.