Clamped receiver array using coiled tubing conveyed packer eleme

Details Clamped receiver array using coiled tubing conveyed packer eleme Clamped receiver array using coiled tubing conveyed packer eleme

1998-03-11

1999-10-05

Dang, Khanh

Acoustics

Geophysical or subsurface exploration

Well logging

166206, G01V 140

Patent

active

059628197

ABSTRACT:
A clamped receiver array using coiled tubing conveyed packer elements is disclosed and described. The receiver array is adapted to be received within a borehole and is therefore particularly useful for borehole seismology. The receiver array has a plurality of receivers connected together by a signal cable. The receivers include sensors which can be 3-component geophones. The apparatus is further provided with a fluid conduit running essentially parallel to the signal cable, the fluid conduit having expansible sections located adjacent to the receivers. The expansible sections expand in response to an increase of fluid pressure within the fluid conduit, contacting the associated receiver and thereby pushing the receiver into a coupled or clamped contact with the casing in the wellbore. The expansible sections have a resilient rubber outer sleeve which fits over a structural tensile strength element which is configured to conduct fluid with the fluid conduit while also providing mechanical strength for the apparatus to be deployed within a wellbore. The apparatus is further provided with a fused valve deployed at the downhole end of the fluid conduit allowing fluid to be circulated through the conduit and a rapid response of the expansible sections in response to an increase of fluid pressure within the fluid conduit.

REFERENCES:
patent: 4428422 (1984-01-01), Laurent
patent: 5864099 (1999-01-01), Wittrisch et al.

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