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Sealed core

  • US 8,684,110 B2
  • Filed: 04/25/2013
  • Issued: 04/01/2014
  • Est. Priority Date: 05/08/2009
  • Status: Active Grant
First Claim
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1. A sidewall coring apparatus for obtaining a plurality of formation cores from a sidewall of a wellbore, the sidewall coring apparatus comprising:

  • a core catching tube configured to store the plurality of formation cores therein and configured to be sealed downhole, wherein the core catching tube comprises;

    an inner sleeve;

    an outer sleeve concentric with the inner sleeve; and

    a spring biasing the outer sleeve with respect to the inner sleeve;

    wherein the inner and outer sleeves comprise corresponding slots configured to align in response to relative movement of the inner and outer sleeves, and when aligned the slots of the inner and outer sleeves allow evacuation of fluid from the core catching tube as one or more of the plurality of formation cores is inserted into the core catching tube.

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