Patent ID: 9464748
Filing Date: 2016-10-11
CPC Classification: E21B,F16K,F16L

Claim Text:
1. A tubular occlusion and pressure damping system, comprising: a tubular; and an occlusion configured to block flow through the tubular, the occlusion comprising: wherein increased pressure within the inside of the tubular exterior of the occlusion moves the cap relative to the mandrel to decrease a volume of the first chamber, force fluid from the first chamber to the second chamber through the flow restrictor, and increase a volume of the second chamber due to sliding engagement between the mandrel and sleeve, and pressure increases within the second chamber lag behind pressure increases in the inside of the tubular exterior of the occlusion at least until the second chamber has reached a selected volume after which pressure within the second chamber increases toward the pressure in the inside of the tubular exterior of the occlusion.