Shape memory alloy vibration isolation device

a memory alloy and vibration isolation technology, applied in vibration drilling, drilling pipes, directional drilling, etc., can solve the problems of vibrations, tools that fail prematurely, vibrations present particular challenges, etc., and achieve the effect of reducing the adverse effects of vibration
US20080060849A1Inactive Publication Date: 2008-03-13ENTCHEV PAVLIN B +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
ENTCHEV PAVLIN B
Publication Date
2008-03-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

Methods and apparatus for mitigating the effects of vibration of various tools, such as those used downhole, by utilizing a vibration isolation device that incorporates Shape Memory Alloys (SMAs). For instance, in some embodiments, a vibration isolation device may be designed and deployed in a manner such that, when a vibration isolation device is operated in an expected manner, the force on the SMAs from static loading is sufficient to induce partial phase transformation between the austenite and martensite phases. This partial phase transformation may result in a reduced stiffness of the vibration isolation device in comparison to a tool in either a full austenite phase or full martensite phase.
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Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Application No. 60 / 844,033, filed Sep. 12, 2006.BACKGROUND

[0002] 1. Field of the Invention

[0003] Embodiments of the present invention generally relate to isolating and reducing vibrations generated by the operation of downhole tools, such as those used in the exploration, production, and / or processing of hydrocarbons.

[0004] 2. Description of the Related Art

[0005] Vibrations are often encountered at various times when exploring for, producing, and processing hydrocarbons. Vibrations may affect not only the performance of tools, but may also cause these tools to fail prematurely if the vibrations are sustained or extreme. One application where vibrations present particular challenges is when drilling subsurface wells with a drill bit at the end of a rotating drill string.

[0006] When drilling a wellbore, two main sources of vibrations are typically present. First, vibrations may be generated...

Claims

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