US2017370182A1PendingUtilityA1

Component and method

37
Assignee: PROVOST WILFREDPriority: Jun 22, 2016Filed: Jun 22, 2016Published: Dec 28, 2017
Est. expiryJun 22, 2036(~9.9 yrs left)· nominal 20-yr term from priority
Inventors:Wilfred Provost
E21B 34/06E21B 2200/05E21B 2200/06E21B 34/063E21B 2034/005E21B 2034/007
37
PatentIndex Score
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Claims

Abstract

A downhole component includes a body and a stress riser formed in the body. The stress riser being positioned and shaped to promote a full fracture of the body while maintaining a structure of the body to bear force in at least one direction. A downhole system having a tubular string disposed in a borehole.

Claims

exact text as granted — not AI-modified
1 . A downhole component comprising:
 a body; and   a stress riser formed in the body, the stress riser being positioned and shaped to promote a full fracture of the body while maintaining a structure of the body to bear force in at least one direction after full fracture has occurred.   
     
     
         2 . The component as claimed in  claim 1  wherein the stress riser is continuous. 
     
     
         3 . The component as claimed in  claim 1  wherein the stress riser is discontinuous. 
     
     
         4 . The component as claimed in  claim 1  wherein the stress riser is a plurality of perforations extending at least partially through the body. 
     
     
         5 . The component as claimed in  claim 1  wherein the stress riser is a score. 
     
     
         6 . The component as claimed in  claim 1  wherein the stress riser is shaped as a ring. 
     
     
         7 . The component as claimed in  claim 6  wherein the stress risers are positioned configured and dimensioned such that remaining shear strength of material in a fracture propagation area of the stress riser around each ring is proportional to an area of that ring. 
     
     
         8 . The component as claimed in  claim 1  wherein the stress riser is shaped, as a frustocone. 
     
     
         9 . The component as claimed in  claim 1  wherein the body is a flapper. 
     
     
         10 . The component as claimed in  claim 9  wherein the flapper is dome shaped. 
     
     
         11 . The component as claimed in  claim 1  wherein the flapper is flat. 
     
     
         12 . The component as claimed in  claim 1  where in the body is a sleeve. 
     
     
         13 . The component as claimed in  claim 12  where in the sleeve includes axially oriented stress risers. 
     
     
         14 . The component as claimed in  claim 12  where in the sleeve includes radially oriented stress risers. 
     
     
         15 . The component as claimed in  claim 1  where in the body includes a coating to enhance pressure holding capability. 
     
     
         16 . The component as claimed in  claim 15  where in the coating is a rubber, other polymer or epoxy. 
     
     
         17 . A downhole system having a tubular string disposed in a borehole comprising at least one component having a body a stress riser formed in the body, the stress riser being positioned and shaped to promote a full fracture of the body while maintaining a structure of the body to bear force in at least one direction after full fracture has occurred. 
     
     
         18 . The system as claimed in  claim 17  wherein the body is a flapper. 
     
     
         19 . The system as claimed in  claim 17  wherein the body is a sleeve.

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