Placement of isolator and electronics in same collar section to reduce tool length
AssigneeHalliburton Energy Services, Inc.
InventorsRuchir Shirish Patwa, Akshay Girish Khandekar, Jiajun Zhao
Life of this patent
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Abstract
Aspects of the subject technology relate to downhole sensing system are disclosed. The system has a first collar configured to accept a receiver, a second collar configured to accept a transmitter; and an acoustic isolator disposed between the first collar and the second collar. The acoustic isolator has a tubular body with a generally smooth exterior surface and an interior surface with a plurality of circumferential grooves formed in the interior surface that modify the acoustic impedance of the tubular body, thereby attenuating an acoustic signal passing through the tubular body.
Claims18
A downhole sensing system, comprising:
- a first collar configured to accept a receiver;
- a second collar configured to accept a transmitter;
- and
- an acoustic isolator disposed between the first collar and the second collar, the acoustic isolator comprising:
- a tubular body having a generally smooth exterior surface and an interior surface with a plurality of circumferential grooves formed in the interior surface that modify the acoustic impedance of the tubular body thereby attenuating an acoustic signal passing through the tubular body;
- and
- a sonde disposed within an interior space of the tubular body and configured to accept an electronics package associated with at least one of the transmitter and the receiver.
An acoustic isolator comprising:
- a tubular body having a generally smooth exterior surface and an interior surface with a plurality of circumferential grooves formed in the interior surface that modify the acoustic impedance of the tubular body thereby attenuating an acoustic signal passing through the tubular body;
- a sonde disposed within an interior space of the tubular body and configured to accept an electronics package associated with at least one of a transmitter and a receiver.
A downhole sensing system, comprising:
- a first collar comprising a first recess configured to accept a receiver;
- a second collar comprising a second recess configured to accept a transmitter;
- a spacer ring disposed between the first and second collars;
- and
- an acoustic isolator disposed between the first collar and the second collar, the acoustic isolator comprising:
- a tubular body having a generally smooth exterior surface and an interior surface with a plurality of circumferential grooves formed in the interior surface that modify the acoustic impedance of the tubular body thereby attenuating an acoustic signal passing through the tubular body;
- and
- a sonde disposed within an interior space of the tubular body and configured to accept an electronics package associated with at least one of the transmitter and the receiver;
- wherein:
- at least one of the first and second collars are primarily composed of a first material having a first speed of sound;
- and
- the spacer ring is primarily composed of a second material having a second speed of sound that is different from the first speed of sound, thereby attenuating an acoustic signal passing between the first and second collars through the spacer ring.
Dependencies are inferred from the claim text.