Mechanical Filter for Acoustic Telemetry Repeater

A method for forming a communication system for a subsea installation, comprising:

• coupling a last acoustic repeater to a tubing section of a tubing string positioned within a subsea tree;
• connecting a cable to the last acoustic repeater for wired communication between the last acoustic repeater and a communication device at a surface location;
• and
• coupling a mechanical filter into the tubing string after the last acoustic repeater has been coupled to the tubing section, the mechanical filter coupled to the tubing section between the last acoustic repeater and the communication device at the surface location and the mechanical filter configured to cause an attenuation to acoustic signals propagating in the tubing string.

A subsea installation, comprising:

• a subsea tree coupled to a subsea well having a wellbore;
• a plurality of tubing sections connected together to form a tubing string extending from above the subsea tree into the wellbore;
• a plurality of acoustic repeaters attached to the tubing string in a spaced apart manner, one of the acoustic repeaters being a last acoustic repeater;
• and
• a mechanical filter connected into the tubing string and forming a part of the tubing string above the last acoustic repeater, the mechanical filter causing an attenuation to acoustic signals propagating in the tubing string above the subsea tree.