US2013153236A1PendingUtilityA1

Subterranean Tool Actuation Using a Controlled Electrolytic Material Trigger

40
Individually held — no corporate assignee on recordPriority: Dec 20, 2011Filed: Dec 20, 2011Published: Jun 20, 2013
Est. expiryDec 20, 2031(~5.4 yrs left)· nominal 20-yr term from priority
Inventors:David S. Bishop
E21B 2200/08E21B 23/00E21B 41/00
40
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A reactant fluid is retained in an isolated state from another reactant using a barrier made of a controlled electrolytic material (CEM). The isolated reactant degrades the CEM barrier in a predetermined time to let another reactant that is preferably well fluid pass through a housing port to reach the formerly isolated reactant. The mixing of the reactants creates pressure that is transmitted to a subterranean tool to set the tool.

Claims

exact text as granted — not AI-modified
I claim: 
     
         1 . An actuation apparatus for a subterranean tool, comprising:
 at least one housing defining a chamber therein and at least one wall opening for selective communication to a surrounding annular space at a subterranean location;   a cover mounted over said wall opening retaining a first material in said chamber and interacting with said cover to weaken said cover in a predetermined time to allow fluid communication through said wall opening and into said chamber for actuation of the subterranean tool.   
     
     
         2 . The apparatus of  claim 1 , wherein:
 said cover is made from a controlled electrolytic material.   
     
     
         3 . The apparatus of  claim 1 , wherein:
 said wall opening comprises a restriction.   
     
     
         4 . The apparatus of  claim 1 , wherein:
 fluid from the annular space reacts with or promotes a reaction with said first material.   
     
     
         5 . The apparatus of  claim 3 , wherein:
 said restriction comprises a one way valve.   
     
     
         6 . The apparatus of  claim 1 , wherein:
 fluid from the annular space creates pressure in said chamber for actuating the tool.   
     
     
         7 . The apparatus of  claim 1 , wherein:
 said chamber further comprises a screen.   
     
     
         8 . The apparatus of  claim 1 , wherein:
 said chamber comprises an orifice in an outlet connected to the tool for actuation of the tool.   
     
     
         9 . The apparatus of  claim 1 , wherein:
 said at least one housing comprises multiple housings each having an outlet connected in parallel to the tool for actuation.   
     
     
         10 . The apparatus of  claim 6 , wherein:
 fluid from said annular space reacts with or promotes a reaction with said first material.   
     
     
         11 . The apparatus of  claim 1 , wherein:
 said at least one housing comprises multiple housings each having an outlet connected in series to the tool for actuation.   
     
     
         12 . The apparatus of  claim 11 , wherein:
 said chambers are connected through at least one force multiplying piston.   
     
     
         13 . The apparatus of  claim 2 , wherein:
 said wall opening comprises a restriction.   
     
     
         14 . The apparatus of  claim 13 , wherein:
 fluid from the annular space reacts with or promotes a reaction with said first material.   
     
     
         15 . The apparatus of  claim 14 , wherein:
 said restriction comprises a one way valve.   
     
     
         16 . The apparatus of  claim 15 , wherein:
 fluid from the annular space creates pressure in said chamber for actuating the tool.   
     
     
         17 . The apparatus of  claim 16 , wherein:
 said chamber further comprises a screen.   
     
     
         18 . The apparatus of  claim 17 , wherein:
 said chamber comprises an orifice in an outlet connected to the tool for actuation of the tool.

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