US2008099201A1PendingUtilityA1

Contaminant excluding junction and method

38
Individually held — no corporate assignee on recordPriority: Oct 31, 2006Filed: Oct 31, 2006Published: May 1, 2008
Est. expiryOct 31, 2026(~0.3 yrs left)· nominal 20-yr term from priority
Inventors:Barton SponchiaDouglas J. Murray
E21B 41/0042
38
PatentIndex Score
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Claims

Abstract

A junction selective contaminant exclusion tool includes a tubular positionable within the junction and having an opening through a wall thereof, a material disposed on an outside surface of the tubular, the material being capable of increasing a radial dimension between a surface of the material in contact with the tubular and an opposite surface of the material upon exposure to a selected species. A method for excluding selected contaminants from a wellbore junction is also disclosed. The method includes: disposing a junction at a wellbore casing window; disposing a tubular member having at least one opening through a wall thereof at the junction, the tubular member including an exclusion material thereon capable of existing in a first configuration and a second configuration, the second configuration obtainable upon exposure to a selected species; and exposing the material to the selected species.

Claims

exact text as granted — not AI-modified
1 . A junction selective contaminant exclusion tool comprising:
 a tubular positionable within the junction and having an opening through a wall thereof,   a material disposed on an outside surface of the tubular, the material being capable of increasing a radial dimension between a surface of the material in contact with the tubular and an opposite surface of the material upon exposure to a selected species.   
   
   
       2 . The exclusion tool as claimed in  claim 1  wherein the material is a swellable material. 
   
   
       3 . The exclusion tool as claimed in  claim 2  wherein the swellable material is swellable in the presence of a selected species. 
   
   
       4 . The exclusion tool as claimed in  claim 3  wherein the selected species is a hydrocarbon. 
   
   
       5 . The exclusion tool as claimed in  claim 1  wherein the material is a shape memory material 
   
   
       6 . The exclusion tool as claimed in  claim 5  wherein the material changes dimension in the presence of a selected species. 
   
   
       7 . The exclusion tool as claimed in  claim 6  wherein the selected species is heat. 
   
   
       8 . The exclusion tool as claimed in  claim 6  wherein the selected species is a hydrocarbon. 
   
   
       9 . The exclusion tool as claimed in  claim 6  wherein the selected species is a chemical species. 
   
   
       10 . The exclusion tool as claimed in  claim 6  wherein the selected species is time. 
   
   
       11 . The exclusion tool as claimed in  claim 5  wherein the material is a foam. 
   
   
       12 . The exclusion tool as claimed in  claim 10  wherein the foam is compressed prior to exposure to a selected species and expands in the presence of the selected species. 
   
   
       13 . The exclusion tool as claimed in  claim 5  wherein the material changes in shape such that an outside dimension of the material is repositioned to provide excluding contact with another surface. 
   
   
       14 . The exclusion tool as claimed in  claim 5  wherein the material is bonded to the tubular with a bonding agent defeatable by exposure to a selected species. 
   
   
       15 . The exclusion tool as claimed in  claim 1  wherein the material is fluid impermeable. 
   
   
       16 . The exclusion tool as claimed in  claim 1  wherein the material is fluid permeable. 
   
   
       17 . The exclusion tool as claimed in  claim 1  further comprising a lip at the tubular positioned to alleviate extrusion of the material. 
   
   
       18 . A sealed junction comprising:
 a junction;   a tubular disposed at the junction, the tubular having at least one opening through a wall thereof;   a fluid permeable or fluid impermeable material in contact with the tubular about the at least one opening and in contact with a surface of the junction, the material being capable of excluding at least some particulate matter from traveling between the hanger and the tubular.   
   
   
       19 . A method for excluding selected contaminants from a wellbore junction comprising:
 disposing a junction at a wellbore casing window;   disposing a tubular member having at least one opening through a wall thereof at the junction, the tubular member including an exclusion material thereon capable of existing in a first configuration and a second configuration, the second configuration obtainable upon exposure to a selected species;   exposing the material to the selected species.   
   
   
       20 . A method for excluding selected contaminants from a wellbore junction as claimed in  claim 19  wherein the exposing is passive. 
   
   
       21 . A method for excluding selected contaminants from a wellbore junction as claimed in  claim 19  wherein the exposing occurs by applying the selected species to the material. 
   
   
       22 . A method for excluding selected contaminants from a wellbore junction as claimed in  claim 19  wherein the exposing includes defeating a bonding agent restraining the material.

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