Manufacture of low cost bits by infiltration of metal powders

a technology of metal powder and manufacturing method, which is applied in the direction of drill bits, drilling accessories, earth-moving drilling and mining, etc., can solve the problems of tungsten carbide b>130/b> (fig. 1) and tungsten b>134/b> (fig. 1), and achieve the effect of reducing the cost of tungsten carbide b>130/b> and reducing the cost of tungsten carbide b>

Inactive Publication Date: 2015-08-27
VAREL INT IND
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  • Claims
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AI Technical Summary

Benefits of technology

This patent is about a method for manufacturing drill bits using a thick-walled mold and displaced metal powders. The method involves positioning a center stalk and nozzle displacement in the mold, placing a blank in the mold, and then infiltrating metal powders into the mold to create the bit. The invention provides a cost-effective way to manufacture drill bits with low-cost infiltrated metal powders. The technical effect of this patent is to provide a more efficient and cost-effective method for manufacturing drill bits with improved performance.

Problems solved by technology

The tungsten carbide matrix used in forming the drill bit 200 is very brittle, not hard, and not ductile; thereby causing eventual failure of the bit 200 during drilling operations.
Further, the cost of tungsten carbide 130 (FIG. 1) and tungsten 134 (FIG. 1) powders used in forming the drill bit 200 are relatively expensive.

Method used

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  • Manufacture of low cost bits by infiltration of metal powders
  • Manufacture of low cost bits by infiltration of metal powders
  • Manufacture of low cost bits by infiltration of metal powders

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Embodiment Construction

[0020]This invention relates generally to downhole tools and methods for manufacturing such items. More particularly, this invention relates to low cost infiltrated metal powders used in drilling products including, but not limited to, fixed cutter bits, polycrystalline diamond compact (“PDC”) drill bits, natural diamond drill bits, thermally stable polycrystalline (“TSP”) drill bits, bi-center bits, core bits, and reamers and stabilizers, and the methods of manufacturing such items. Although the description provided below is related to a drill bit, embodiments of the present invention relate to any infiltrated metal powders used to fabricate a drilling product.

[0021]FIG. 3 shows a cross-sectional view of a downhole tool casting assembly 300 in accordance with the exemplary embodiment. Referring to FIG. 3, the downhole tool casting assembly 300 includes a mold 310, a stalk 320, one or more nozzle displacements 322, a blank 324, a funnel 340, and a binder pot 350. The downhole tool c...

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Abstract

An apparatus and method for manufacturing a downhole tool. The cemented matrix material is formed from a metal powder, a shoulder powder, and a binder material, wherein the metal powder and / or the shoulder powder includes at least one of stainless steel powder, nickel powder, cobalt powder, iron powder, or powders of other suitable metals or alloys, or a combination of such mentioned powders.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This present application claims priority to U.S. Provisional Patent Application No. 61 / 943,141, entitled “Manufacture Of Low Cost Bits By Infiltration Of Metal Powders,” filed Feb. 21, 2014, the disclosure of which is incorporated herein.BACKGROUND OF THE INVENTION[0002]This invention relates generally to downhole tools and methods for manufacturing such items. More particularly, this invention relates to low cost infiltrated metal powders used in drilling products including, but not limited to, fixed cutter bits, polycrystalline diamond compact (“PDC”) drill bits, natural diamond drill bits, thermally stable polycrystalline (“TSP”) drill bits, bi-center bits, core bits, and reamers and stabilizers, and the methods of manufacturing such items.[0003]Full hole tungsten carbide matrix drill bits for oilfield applications have been manufactured and used in drilling since at least as early as the 1940's. FIG. 1 shows a cross-sectional view of ...

Claims

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Application Information

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IPC IPC(8): E21B10/46B22F1/00B22F3/26B22F7/08B22F7/00B22F1/12
CPCE21B10/46B22F7/08B22F1/0003B22F3/26B22F7/008E21B10/00C22C32/0052C22C33/0292C22C1/0433C22C1/1036B22F1/09B22F1/12
InventorAMUNDSEN, MARVIN WINDSORBELLIN, FEDERICOTHIGPEN, GARY M.JOHNSON, CHARLES DANIEL
OwnerVAREL INT IND