US2016160593A1PendingUtilityA1

Degradable anchor device with retained granular material

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Assignee: BAKER HUGHES INCPriority: Dec 5, 2014Filed: May 13, 2015Published: Jun 9, 2016
Est. expiryDec 5, 2034(~8.4 yrs left)· nominal 20-yr term from priority
Inventors:Yingqing XuJason M. HarperBarbara A. Pratt
E21B 23/01E21B 23/0411E21B 33/1208E21B 33/124E21B 33/129E21B 29/02E21B 2200/08
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Claims

Abstract

Therefore in one aspect, an anchoring device is disclosed, including: a degradable substrate with a first hardness wherein an outer extent of the degradable surface includes at least one retaining feature; and a granular gripping material associated with the outer extent of the degradable substrate and the at least one retaining feature, wherein the at least one retaining feature retains the granular gripping material and the granular gripping material has a second hardness greater than the first hardness. In certain embodiments, the at least one retaining feature is at least one bump ring. In certain embodiments, the at least one bump ring is at least one segmented bump ring. In certain embodiments, the at least one retaining feature is at least one helical feature. In certain embodiments, the at least one retaining feature is at least one knurled region. In certain embodiments, the degradable substrate includes a leading protrusion.

Claims

exact text as granted — not AI-modified
1 . An anchoring device, comprising:
 a degradable substrate with a first hardness, wherein an outer extent of the degradable surface includes at least one retaining feature;   a granular gripping material associated with the outer extent of the degradable substrate and the at least one retaining feature, wherein the at least one retaining feature retains the granular gripping material and the granular gripping material has a second hardness greater than the first hardness.   
     
     
         2 . The anchoring device of  claim 1 , wherein the at least one retaining feature is at least one bump ring. 
     
     
         3 . The anchoring device of  claim 2 , wherein the at least one bump ring is at least one segmented bump ring. 
     
     
         4 . The anchoring device of  claim 1 , wherein the at least one retaining feature is at least one helical feature. 
     
     
         5 . The anchoring device of  claim 1 , wherein the at least one retaining feature is at least one knurled region. 
     
     
         6 . The anchoring device of  claim 1 , wherein the degradable substrate includes a leading protrusion. 
     
     
         7 . The anchoring device of  claim 6 , wherein the leading protrusion limits an engagement depth of the anchoring device. 
     
     
         8 . The anchoring device of  claim 6 , wherein the leading protrusion retains the granular gripping material. 
     
     
         9 . A method to anchor a downhole device, comprising:
 providing a degradable substrate with a first hardness, wherein an outer extent of the degradable surface includes at least one retaining feature;   applying a granular gripping material to the outer extent of the degradable substrate and the at least one retaining feature, wherein the granular gripping material has a second hardness greater than the first hardness; and   retaining the granular gripping material via the at least one retaining feature.   
     
     
         10 . The method of  claim 9 , wherein the at least one retaining feature is at least one bump ring. 
     
     
         11 . The method of  claim 10 , wherein the at least one bump ring is at least one segmented bump ring. 
     
     
         12 . The method of  claim 9 , wherein the at least one retaining feature is at least one helical feature. 
     
     
         13 . The method of  claim 9 , wherein the at least one retaining feature is at least one knurled region. 
     
     
         14 . The method of  claim 9 , wherein the degradable substrate includes a leading protrusion. 
     
     
         15 . A down hole system, comprising:
 a casing string; and   an anchoring device associated with the casing string, comprising:   a degradable substrate with a first hardness, wherein an outer extent of the degradable surface includes at least one retaining feature; and   a granular gripping material associated with the outer extent of the degradable substrate and the at least one retaining feature, wherein the at least one retaining feature retains the granular gripping material and the granular gripping material has a second hardness greater than the first hardness.   
     
     
         16 . The downhole system of  claim 15 , wherein the at least one retaining feature is at least one bump ring. 
     
     
         17 . The downhole system of  claim 16 , wherein the at least one bump ring is at least one segmented bump ring. 
     
     
         18 . The downhole system of  claim 15 , wherein the at least one retaining feature is at least one helical feature. 
     
     
         19 . The downhole system of  claim 15 , wherein the at least one retaining feature is at least one knurled region. 
     
     
         20 . The downhole system of  claim 15 , wherein the degradable substrate includes a leading protrusion.

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