Cutter assemblies, downhole tools incorporating such cutter assemblies and methods of making such downhole tools
First Claim
Patent Images
1. A downhole cutting tool, comprising:
- a cutting element support structure having at least one cutter pocket formed therein;
at least one outer support element immovably attached to the at least one cutter pocket; and
at least one cutting element positioned within a cavity of the outer support element and immovably attached thereto utilizing a mechanical locking mechanism of a set pin arrangement or a spring-loaded retention arrangement arranged to immovably attach the at least one cutting element to the at least one outer support and positioned such that the mechanism is exposed in part to the outer surface of the tool, the cutting element comprising a substrate and an ultrahard material layer bonded to the substrate.
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Accused Products
Abstract
Cutter assemblies comprising an outer support element and a cutting element disposed therein. The cutting element is immovably attached to the outer support element. Also provided are downhole tools incorporating such cutter assemblies and methods of making such downhole tools.
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Citations
27 Claims
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1. A downhole cutting tool, comprising:
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a cutting element support structure having at least one cutter pocket formed therein; at least one outer support element immovably attached to the at least one cutter pocket; and at least one cutting element positioned within a cavity of the outer support element and immovably attached thereto utilizing a mechanical locking mechanism of a set pin arrangement or a spring-loaded retention arrangement arranged to immovably attach the at least one cutting element to the at least one outer support and positioned such that the mechanism is exposed in part to the outer surface of the tool, the cutting element comprising a substrate and an ultrahard material layer bonded to the substrate.
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2. A downhole tool for drilling an earthen formation, comprising
a tool body; - and
an indexable cutter assembly mounted thereon, the indexable cutter assembly comprising an outer support element and a cutting element comprising a substrate and an ultrahard material layer;
wherein;the ultrahard material layer has a cutting face, cutting edge, and a side surface; the outer support element comprises an outer surface and an inner surface defining a cavity; at least a portion of the cutting element is positioned within the cavity of the outer support element; the outer support element extends at least a majority of an axial length of the cutting element; the outer support element and the cutting element comprise an indexable arrangement providing at least two selected positions of the cutting element within the outer support element such that one of the at least two selected positions provides a first portion of the ultrahard material layer for contacting the earthen formation during drilling; and the cutting element is immovably attached to the outer support element. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A downhole tool for drilling an earthen formation comprising,
a tool body; - and
an indexable cutter assembly mounted thereon, the indexable cutter assembly comprising an outer support element and a cutting element comprising a substrate and an ultrahard material layer;
wherein;the ultrahard material layer has a cutting face, cutting edge, and a side surface; the outer support element comprises an outer surface and an inner surface defining a cavity; at least a portion of the cutting element is positioned within the cavity of the outer support element; the outer support element and the cutting element comprise an indexable arrangement of the cutting element repositionable relative to the outer support element, providing at least two selected positions of the cutting element within the outer support element such that one of the at least two selected positions provides the cutting edge of the ultrahard material layer for contacting the earthen formation during drilling; and the cutting element is immovably attached to the outer support element. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification