US2015259985A1PendingUtilityA1

Short matrix drill bits and methodologies for manufacturing short matrix drill bits

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Assignee: THIGPEN GARY MICHAELPriority: Mar 11, 2014Filed: Mar 11, 2015Published: Sep 17, 2015
Est. expiryMar 11, 2034(~7.6 yrs left)· nominal 20-yr term from priority
Inventors:Gary M. ThigpenFederico BellinMichel De ReynalMarvin Windsor AmundsenCharles Daniel Johnson
C22C 29/08C21D 2251/04C21D 3/04C22C 38/00B22F 7/062B22F 7/08E21B 10/54E21B 10/55
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Claims

Abstract

A short matrix drill bit is disclosed along with methods of manufacturing the same. The Short drill matrix bit includes a combination shank/blank bonded to a matrix. The combination shank/blank includes a blank portion and a shank portion, which are formed as a unitary component. The combination shank and blank may also include an outer layer formed along at least a portion of the combination shank/blank. In some instances, the outer layer is nickel plating, or some other suitable material, which facilitates wetting of the binder material used to form the matrix.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A downhole tool, comprising:
 a combination shank/blank comprising a shank portion and a blank portion, the shank portion comprising a threaded portion at one end, the blank portion forming a bore extending centrally therethrough; and   a bit body comprising a matrix bonded to and surrounding at least a portion of the blank portion, the matrix forming one or more blades extending outwardly in a direction away from the blank,   wherein the combination shank/blank is fabricated as a unitary construction component using the same material.   
     
     
         2 . The downhole tool of  claim 1 , further comprising a coating formed along at least a portion of a surface of the blank portion that bonds with the matrix. 
     
     
         3 . The downhole tool of  claim 2 , wherein the coating comprises a thickness ranging from about 1/16 inch to ⅛ inch. 
     
     
         4 . The downhole tool of  claim 2 , wherein the coating comprises a thickness ranging from about 0.0005 inch to ⅛ inch. 
     
     
         5 . The downhole tool of  claim 1 , wherein the combination shank/blank is manufactured using AISI 4140. 
     
     
         6 . The downhole tool of  claim 5 , further comprising a coating formed along at least a portion of a surface of the blank portion that bonds with the matrix. 
     
     
         7 . The downhole tool of  claim 6 , wherein the coating comprises a nickel coating. 
     
     
         8 . The downhole tool of  claim 6 , wherein the coating comprises a low carbon steel layer welded onto at least a portion of the surface of the blank portion. 
     
     
         9 . The downhole tool of  claim 6 , wherein the coating is formed by decarburizing at least a portion of the surface of the blank portion prior to an infiltration process performed in forming the downhole tool. 
     
     
         10 . The downhole tool of  claim 1 , wherein the combination shank/blank is manufactured using precipitation hardening steel. 
     
     
         11 . The downhole tool of  claim 1 , wherein the combination shank/blank is manufactured using maraging steel. 
     
     
         12 . A method for forming a matrix downhole tool having a reduced overall height, comprising:
 obtaining a combination shank/blank comprising a shank portion and a blank portion, the shank portion comprising a threaded portion at one end, the blank portion forming a bore extending centrally therethrough; and   bonding a matrix to and surrounding at least a portion of the blank portion, the matrix forming one or more blades extending outwardly in a direction away from the blank,   wherein the combination shank/blank is fabricated as a unitary construction component using the same material.   
     
     
         13 . The method of  claim 12 , further comprising forming a coating along at least a portion of a surface of the blank portion that bonds with the matrix. 
     
     
         14 . The method of  claim 13 , wherein the coating comprises a thickness ranging from about 1/16 inch to ⅛ inch. 
     
     
         15 . The method of  claim 13 , wherein the coating comprises a thickness ranging from about 0.0005 inch to ⅛ inch. 
     
     
         16 . The method of  claim 12 , wherein the combination shank/blank is manufactured using AISI 4140. 
     
     
         17 . The method of  claim 16 , further comprising forming a coating along at least a portion of a surface of the blank portion that bonds with the matrix. 
     
     
         18 . The method of  claim 17 , wherein the coating comprises a nickel coating. 
     
     
         19 . The method of  claim 17 , wherein the coating comprises a low carbon steel layer welded onto at least a portion of the surface of the blank portion. 
     
     
         20 . The method of  claim 17 , wherein the coating is formed by decarburizing at least a portion of the surface of the blank portion prior to an infiltration process performed in forming the downhole tool. 
     
     
         21 . The method of  claim 12 , wherein the combination shank/blank is manufactured using precipitation hardening steel. 
     
     
         22 . The method of  claim 12 , wherein the combination shank/blank is manufactured using maraging steel.

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