Hardfacing materials with highly conforming properties

a hardfacing material and conforming technology, applied in the field of drill bits, can solve the problems of welded inner parts, time-consuming and expensive machining, and inability to meet the requirements of the material, and achieve the effect of increasing the durability of the drill bi

Inactive Publication Date: 2007-05-17
BAKER HUGHES INC
View PDF11 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] A method of increasing the durability of a drill bit, which includes the step providing a pliable sheet of a hardfacing matrix material. The pliable sheet of hardfacing material has a nickel and chromium matrix combined with a first element. The first element is selected from a group consisting of spherical sintered tungsten carbide, spherical cast tungsten carbide, and metallic glass. The hardfacing matrix material sheet is placed on a preselected surface of the drill bit. The hardfacing matrix material sheet is then fusion bonded to the drill bit.

Problems solved by technology

Even with skilled welders, imperfections can be present due to varying thicknesses of the weld, shape of the drill bit the hardfacing is being welded upon, and the beads associated with welding processes.
Machining can be time-consuming and expensive.
Moreover, hardfacing was not welded to inner parts due to narrow clearances and expense.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hardfacing materials with highly conforming properties
  • Hardfacing materials with highly conforming properties
  • Hardfacing materials with highly conforming properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Referring to FIG. 1, bit assembly 11 has a body 13 on a lower end. Body 13 has a face 15 on its lower end. A plurality of blades 17 are formed on and protrude from face 15, with six blades 17 being shown in the drawings. Blades 17 lead outward from a central portion of face 15 to a gage area at the periphery of body 13. Blades 17 are separated from each other, defining junk slots 19 between them for the passage of drilling fluid and cuttings. Each blade 17 contains a row of conventional cutters typically polycrystalline diamond (PCD). Nozzles 23 discharge drilling fluid, which flows through junk slots 19 and back up the borehole along with the cuttings. While bit assembly 11 is illustrated as a “drag bit” or steel-bodied bit, it should be readily apparent to those skilled in the art that the teachings herein are also applicable to tri-cone bits, or cast bits, such as those illustrated in FIG. 1 of U.S. Reissue Pat. No. RE 37,127.

[0025] A set of primary gage pads 25 is integr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
durabilityaaaaaaaaaa
metallicaaaaaaaaaa
areaaaaaaaaaaa
Login to view more

Abstract

An earth-boring bit, and a method of increasing the durability of the same, which includes the step providing a pliable sheet of a hardfacing matrix material. The pliable sheet of hardfacing material has a nickel and chromium matrix combined with a first element. The first element is selected from a group consisting of spherical sintered tungsten carbide, spherical cast tungsten carbide, and metallic glass. The hardfacing matrix material sheet is placed on a preselected surface of the drill bit. The hardfacing matrix material sheet is then fusion bonded to the drill bit.

Description

RELATED APPLICATIONS [0001] This nonprovisional patent application claims the benefit of co-pending, provisional patent application U.S. Ser. No. 60 / 737,003, filed on Nov. 15, 2005, which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] This invention relates in general to drill bits for well drilling, and in particular to a metallic hardfacing matrix and method of applying the metallic hardfacing matrix to drill bits. [0004] 2. Background of the Invention [0005] Rotary well drilling for oil and gas is primarily accomplished through one of two types of bits. In a rotary cutter bit, the bit body has typically three rotatable cones or cutters. The cones rotate on bearing pins and have teeth or tungsten carbide inserts for disintegrating the earth formation. In the fixed cutter or drag bit type, the bit body has a face which contains cutting elements mounted on fixed blades. The cutting elements are typically polycr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(United States)
IPC IPC(8): E21B10/00
CPCC23C30/005E21B10/46
Inventor OVERSTREET, JAMES L.CURRY, DAVID A.EASON, JIMMY W.STEVENS, JOHN H.SULLIVAN, ERIC C.
Owner BAKER HUGHES INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap