Packaging for electronics in downhole assemblies

A downhole device, configured to be inserted into a borehole, the downhole device comprising:

• a device body having an outer surface and a recess formed in the outer surface;
• a cover covering the recess to form a first cavity;
• a first shock-absorber configured to absorb mechanical shock to protect an electrical module and configured to support the electrical module within the first cavity, and a second shock-absorber separated from the first shock-absorber, the second shock-absorber configured to absorb mechanical shock to protect the electrical module and configured to support the electrical module within the first cavity, the first shock-absorber and the second shock-absorber disposed between a base of the first cavity and the cover opposite the base;
• and
• a vibration-damping layer disposed between the base and the cover, the vibration-damping layer configured to dampen mechanical vibration of the electrical module, wherein the downhole device is a segment of a downhole assembly, and the device body is a collar body defining a second cavity extending end-to-end through the collar body, and wherein the second cavity is configured to have a fluid flow therethrough, and the vibration-damping layer is made of a temperature-transmitting material configured to transmit heat from the electrical module, through the vibration-damping layer and the collar body, to the fluid.

A downhole device, configured to be inserted into a borehole, the downhole device comprising:

• a device body having an outer surface and a recess formed in the outer surface;
• a cover covering the recess to form a first cavity;
• a first shock-absorber configured to absorb mechanical shock to protect an electrical module and configured to support the electrical module within the first cavity, and a second shock-absorber separated from the first shock-absorber, the second shock-absorber configured to absorb mechanical shock to protect the electrical module and configured to support the electrical module within the first cavity, the first shock-absorber and the second shock-absorber disposed between a base of the first cavity and the cover opposite the base;
• and
• a vibration-damping layer disposed between the base and the cover, the vibration-damping layer configured to dampen mechanical vibration of the electrical module, wherein at least one of the first shock-absorber and the second shock-absorber is configured to maintain the electrical module stationary within the first cavity by contacting a first surface of the electrical module facing the base of the first cavity, and by contacting a second surface of the electrical module opposite the first surface and facing the cover.

A downhole assembly having a plurality of downhole segments for being inserted in a borehole, the downhole assembly comprising:

• a first downhole segment, among the plurality of downhole segments, having a longitudinal axis, the first downhole segment having a recess in an outer surface of a collar body defining a first cavity, the collar body defining a second cavity extending through the collar body, the first downhole segment including a cover covering the first cavity;
• a first shock-absorber configured to absorb mechanical shock to protect an electrical module and configured to support the electrical module within the first cavity, and a second shock-absorber separated from the first shock-absorber, the electrical module having a length in a direction parallel to the longitudinal axis and a width in a direction perpendicular to the longitudinal axis and perpendicular to a radius of the first downhole segment, the second shock-absorber configured to absorb mechanical shock to protect the electrical module and configured to support the electrical module within the first cavity, the first shock-absorber and the second shock-absorber disposed between a base of the first cavity and the cover opposite the base, the first shock-absorber and the second shock-absorber disposed at opposing ends of the width of the electrical module or disposed at opposing ends of the length of the electrical module;
• and
• a vibration-damping layer disposed between the base and the cover, the vibration-damping layer configured to dampen mechanical vibration of the electrical module.

A downhole assembly, having a plurality of downhole segments for being inserted in a borehole, the downhole assembly comprising:

• a first downhole segment, among the plurality of downhole segments, having a recess in an outer surface of a collar body defining a first cavity, the collar body defining a second cavity extending through the collar body, the first downhole segment including a cover covering the first cavity;
• a first shock-absorber configured to absorb mechanical shock from to protect an electrical module and configured to support the electrical module within the first cavity, and a second shock-absorber separated from the first shock-absorber, the second shock-absorber configured to absorb mechanical shock to protect the electrical module and configured to support the electrical module within the first cavity, the first shock-absorber and the second shock-absorber disposed between a base of the first cavity and the cover opposite the base;
• and
• a vibration-damping layer disposed between the base and the cover, the vibration-damping layer configured to dampen mechanical vibration of the electrical module, wherein the plurality of downhole segments include a channel configured to have a fluid flow therethrough, the second cavity being part of the channel, the vibration-damping layer being made of a temperature-transmitting material for transmitting heat from the electrical module, through the vibration-damping layer and the collar body to the fluid.