Enclosures for containing transducers and electronics on a downhole tool
AssigneeSchlumberger Technology Corporation
InventorsMiguel F. Pabon, Fernando Garcia Osuna, David B. Ayers
Life of this patent
Estimating the term…
Abstract
A measurement package for disposal on an apparatus such as a downhole tool or a tool like device. The measurement package including an enclosure, a first acoustic transducer housed within the enclosure, a second acoustic transducer housed within the enclosure and electronics housed within the enclosure that is in communication with the first and second transducers. Further, an acoustic transmitter and receivers can be disposed at an angle with respect to a longitudinal axis of the enclosure. The enclosure can contain attenuative material surrounding the transmitter and receivers, and electronics for controlling the transmitter and receivers and communicating with the downhole tool.
Claims36
A measurement package for disposal on a downhole tool, the measurement package comprising:
- an enclosure;
- a first acoustic transducer housed within the enclosure;
- a second acoustic transducer housed within the enclosure;
- an acoustic attenuative material positioned within the enclosure so as to substantially attenuate acoustic energy travelling from the first acoustic transducer to the second acoustic transducer, wherein the attenuative material includes an attenuative block positioned between the first and second acoustic transducers;
- and
- electronics housed within the enclosure and in communication with the first and second acoustic transducers.
A downhole tool for subsurface disposal, the downhole tool comprising:
- an elongated support;
- an enclosure disposed on the elongated support, the enclosure comprising:
- a first acoustic transducer housed within the enclosure;
- a second acoustic transducer housed within the enclosure;
- an acoustic attenuative material positioned within the enclosure so as to substantially attenuate acoustic energy travelling from the first transducer to the second transducer,
- wherein the acoustic attenuative material includes a attenuative block having alternating acoustic scattering members and acoustic absorbing members;
- and
- electronics coupled to the first acoustic transducer and the second acoustic transducer, wherein the electronics are housed within the enclosure.
A method for making acoustic measurements in a borehole with a downhole tool, the method comprising:
- positioning the downhole tool in the borehole, the downhole tool having an enclosure disposed thereon
- disposing within the enclosure is a first transducer and a second transducer;
- disposing an acoustic attenuative material within the enclosure so as to substantially surround at least the first and second transducers and to substantially attenuate acoustic energy travelling from the first transducer to the second transducer along with the attenuative material substantially attenuating acoustic energy, wherein the acoustic attenuative material includes a attenuative block having alternating acoustic scattering members and acoustic absorbing members;
- activating a first transducer so as to transmit acoustic energy into the downhole environment;
- and
- detecting a response to the transmitted acoustic energy with a second transducer, wherein the enclosure houses the first and second transducers and electronics coupled to the first and second transducers.
A measurement package for disposal on a downhole tool, the measurement package comprising:
- an enclosure;
- a pressure compensating fluid housed within the enclosure;
- a deformable membrane housed within the enclosure so as to allow for volume changes of the pressure compensating fluid due to changes in pressure;
- a first acoustic transducer housed within the enclosure;
- a second acoustic transducer housed within the enclosure;
- and
- electronics housed within the enclosure and in communication with the first acoustic transducer and the second acoustic transducer.
Dependencies are inferred from the claim text.