Rugged quartz clock
AssigneeSchlumberger Technology Corporation
InventorNORIYUKI MATSUMOTO
Life of this patent
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Abstract
A resonator clock suitable for use in downhole conditions is described. The resonator clock includes a resonator portion of piezoelectric material; two electrodes in electrical communication with the resonator portion such that the resonator portion resonates when voltage is applied between the two electrodes; and four supports to support the resonator portion. The supports are dimensioned and positioned to support the resonator portion under shock and vibration encountered in downhole use. The supports and the resonator portion are formed from the same continuous piece of piezoelectric material.
Claims26
A resonator clock for use in downhole conditions comprising:
- a resonator portion of piezoelectric material;
- two electrodes in electrical communication with the resonator portion such that the resonator portion resonates when voltage is applied between the two electrodes;
- and
- two or more supports to support the resonator portion, the supports being dimensioned and positioned to support the resonator portion under shock and vibration encountered in downhole use, wherein the supports and the resonator portion are formed from the same continuous piece of piezoelectric material.
A method of making measurements downhole comprising:
- positioning a downhole tool body in a wellbore;
- and
- making measurements using the tool body in part by using a resonator clock that includes a resonator portion of piezoelectric material, two electrodes in electrical communication with the resonator portion such that the resonator portion resonates when voltage is applied between the two electrodes, and two or more supports to support the resonator portion, the supports being dimensioned and positioned to support the resonator portion under shock and vibration encountered in downhole use, wherein the supports and the resonator portion are formed from the same continuous piece of piezoelectric material.
A downhole tool comprising:
- a tool body dimensioned and adapted to be deployed downhole in a wellbore;
- and
- a resonator clock mounted within the tool body, the resonator clock including a resonator portion of piezoelectric material, two electrodes in electrical communication with the resonator portion such that the resonator portion resonates when voltage is applied between the two electrodes, and two or more supports to support the resonator portion, the supports being dimensioned and positioned to support the resonator portion under shock and vibration encountered in downhole use, wherein the supports and the resonator portion are formed from the same continuous piece of piezoelectric material.
Dependencies are inferred from the claim text.