Outer tube for a perforating gun
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United States of America Patent
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Oct 8, 2019
Grant Date -
Jun 28, 2018
app pub date -
Feb 18, 2018
filing date -
Apr 25, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An outer tube for a perforating gun is provided that includes an inner wall and an outer wall and also a wall thickness (D) and a length (L), wherein the outer tube has a hardness over its entire longitudinal extent along the length (L) and its transverse extent along the wall thickness (D), wherein the hardness of the outer tube is reduced, in at least one region, to an extent (T) measured from the outer wall to the inner wall, wherein, in this region, the outer tube has a reduced hardness (HV) on its outer wall, said reduced hardness being reduced in this region by at least 5% in relation to the hardness (H) of the inner wall.
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