Chemically treated substrate strips in screens for open hole gravel packing and stand alone screens

Abstract

A production string and method of preventing accumulation of a compositional material in a production string. An inhibitor strip is disposed in a fluid inflow device of the production string. Fluid is received at the inhibitor strip in the fluid inflow device from a formation. The inhibitor strip includes a chemical inhibitor that interacts with a chemical in the fluid to reduce the production of the compositional material in the production string.

What is claimed is: 
     
         1 . A method of preventing production of a compositional material in a production string, comprising:
 disposing an inhibitor strip in a fluid inflow device of the production string, the inhibitor strip having a coating of a chemical inhibitor on a surface of the inhibitor strip; and   receiving a fluid at the fluid inflow device from a formation to flow across the inhibitor strip, wherein lithe chemical inhibitor interacts with a chemical in the fluid to reduce the production of the compositional material in the production string.   
     
     
         2 . The method of  claim 1 , wherein the fluid inflow device includes a base pipe and a screen forming an annular region around the base pipe, further comprising disposing the inhibitor strip in a channel between the base pipe and the screen. 
     
     
         3 . The method of  claim 2 , wherein the screen and the base pipe form one or more drainage channels, further comprising disposing the inhibitor strip in the one or more drainage channels. 
     
     
         4 . The method of  claim 2 , wherein the inhibitor strip is elongated along a longitudinal axis of the base pipe. 
     
     
         5 . The method of  claim 2 , wherein disposing the inhibitor strip further comprising placing a plurality of inhibitor strips circumferentially around an axial section of the base pipe. 
     
     
         6 . The method of  claim 1 , wherein the inhibitor strip is further impregnated with the chemical inhibitor. 
     
     
         7 . The method of  claim 1 , further comprising recharging the inhibitor strip with the chemical inhibitor at its location in the wellbore. 
     
     
         8 . The method of  claim 1 , wherein the compositional material includes at least one of scale, paraffin and asphaltene. 
     
     
         9 . A production string, comprising:
 a fluid inflow device; and   an inhibitor strip disposed in contact with the fluid inflow device, the inhibitor strip having a coating of a chemical inhibitor on a surface of the inhibitor strip that interacts with chemicals in a fluid flowing through the fluid inflow device and across the inhibitor strip to reduce the production of a compositional material in the production string.   
     
     
         10 . The production string of  claim 9 , further comprising:
 a base pipe of the fluid inflow device; and   a screen forming an annular region around the base pipe; wherein the inhibitor strip is disposed within the annular region.   
     
     
         11 . The production string of  claim 10 , further comprising one or more drainage channels between the base pipe and the screen, wherein the inhibitor strip is disposed within the one or more drainage channels. 
     
     
         12 . The production string of  claim 10 , wherein the inhibitor strip is elongated along a longitudinal axis of the base pipe. 
     
     
         13 . The production string of  claim 10 , wherein the inhibitor strip further comprises a plurality of inhibitor strips disposed circumferentially around an axial section of the base pipe. 
     
     
         14 . The production string of  claim 9 , wherein the inhibitor strip is further impregnated with the chemical inhibitor. 
     
     
         15 . The production string of  claim 9 , wherein the inhibitor strip is capable of being recharged with additional chemical inhibitor when deployed in a wellbore.