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US 9,869,788 B2Granted
Seismic detector
AssigneeSchlumberger Technology Corporation
InventorsToru Ikegami, Ryo Imai, Takashi Yoshikawa
Life of this patent
Estimating the term…
Abstract
A technique facilitates seismic wave detection with a seismic receiver. The seismic receiver has a tool body, a vibrationally isolated sensor package mounted in the tool body, and a plurality of contact shoes. The contact shoes are mounted around the sensor package in a distribution which enables three-point contact with a surrounding wellbore wall regardless of the azimuthal orientation of the sensor package.
Claims15
A system for seismic detection, comprising:
- a tool string;
- and
- a plurality of seismic receivers positioned along the tool string, each seismic receiver comprising:
- a tool body;
- a sensor package coaxially placed in the tool body;
- an isolation spring system coupling the sensor package to the tool body, wherein the isolation spring system is adjacent a clamping mechanism that comprises at least one magnet located in the tool body;
- and
- a plurality of contact shoes for detecting seismic waves, the plurality of contact shoes being mounted to the sensor package and distributed along an exterior of the sensor package to establish three-point contact with a subterranean wall regardless of azimuthal orientation of the sensor package.
5 more elements
A method, comprising:
- forming a seismic receiver with a tool body, a sensor package mounted in the tool body, and a plurality of contact shoes mounted around the sensor package in a distribution which enables three-point contact with a surrounding wellbore wall regardless of azimuthal orientation of the sensor package;
- vibrationally isolating the sensor package from the tool body, using an isolation spring system coupling the sensor package to the tool body, wherein the isolation spring system is adjacent a clamping mechanism that comprises at least one magnet;
- delivering the seismic receiver downhole via a tool string;
- and
- biasing the sensor package toward the surrounding wellbore wall to establish the three-point contact between the plurality of contact shoes and the surrounding wellbore wall.
2 more elements
A system, comprising
- a seismic receiver having a tool body and a sensor package mounted in the tool body via an isolation system to isolate the sensor package from vibrational interference wherein the isolation system comprises a spring and is located with the body and connects the sensor package with the tool body, wherein the isolation spring system is adjacent a clamping mechanism that comprises at least one magnet located in the tool body, the seismic receiver further comprising a plurality of contact shoes to detect seismic data, the plurality of contact shoes extending from the sensor package in a manner able to establish three-point contact with a wellbore wall regardless of azimuthal orientation of the sensor package.
Dependencies are inferred from the claim text.