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November 2004

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Subject:
From:
"COOKE, ROBERT W. (JSC-NX) (WGI)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, COOKE, ROBERT W. (JSC-NX) (WGI)
Date:
Thu, 18 Nov 2004 16:53:58 -0600
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text/plain
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text/plain (58 lines)
Steve,

The downhole environment found in the oil/gas industry typically subjects
monitoring and instrumentation packages to extremely high-G shock loads with
harmonics, and also includes high temperatures, high humidity, radiation,
and corrosives.

Some of the downhole instrumentation companies have solved the shock and
harmonic problem by clipping off the component leads and replacing them with
short insulated stranded jumpers to the circuit board (i.e.: flying leads).
The component bodies are bonded to the board, and the assemblies are
encapsulated.

It looks a little funny, but it works.

Bob

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Thursday, November 18, 2004 2:37 PM
To: [log in to unmask]
Subject: [TN] Assemblies built to withstand very high G-loads...

Afternoon All!

This is just a general question concerning assemblies that are built to
withstand very, very high G-loads. G-loads that are much higher than airborn
avionics, or even missiles. Is there any special processes that would need
to be considered that would be radically different than what are used to
build airborn avionics and/or missile electronics? If you can't talk about
it I understand...

-Steve Gregory-

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