Acoustic isolater for a downhole tool

摘要

A downhole tool for acoustically imaging a subterranean formation having a transmitter and receiver and which includes an acoustic isolator between the transmitter and receiver. The acoustic isolator includes attenuation elements with rounded ends and that are connected in series by compression fittings. The compression fittings include sleeves that threadingly engage lock nuts and compressively engage the rounded ends. The contact interfaces between the compression fittings extend along a curved path thereby limiting acoustic transmission along the series of attenuation elements.

主权项

1. An acoustic tool for imaging in a subterranean wellbore comprising:
a transmitter; a receiver; a communication path defined by a transmission of acoustic signals between the transmitter and receiver; and an acoustic isolator disposed between the transmitter and receiver that comprises,
an attenuation element having a rounded end,a compression element that couples with the rounded end and along a contact interface that defines a curved path, is in the communication path, and that defines a reduction in cross sectional area of the communication path.