Borehole drill bit cutter indexing
First Claim
Patent Images
1. An apparatus comprising:
- a housing located in a drill bit;
an indexing cog in physical communication with a cutter and interlocking with the housing in a first index position of a plurality of index positions in response to a first compressive load applied to a surface of the cutter that is located external to the housing and in a direction substantially along rotational axis of the cutter;
anda motivator configured to disengage the indexing cog from the housing and position the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter.
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Abstract
For drill bit cutter indexing, a housing is disposed in a drill bit. An indexing cog is in physical communication with a cutter and interlocks with the housing in a first index position of a plurality of index positions in response to a first compressive load applied to the cutter. A motivator disengages the indexing cog from the housing and positions the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter.
107 Citations
20 Claims
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1. An apparatus comprising:
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a housing located in a drill bit; an indexing cog in physical communication with a cutter and interlocking with the housing in a first index position of a plurality of index positions in response to a first compressive load applied to a surface of the cutter that is located external to the housing and in a direction substantially along rotational axis of the cutter; and a motivator configured to disengage the indexing cog from the housing and position the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 19)
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9. an apparatus comprising:
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a housing disposed in a drill bit; an indexing cog in physical communication with a cutter and interlocking with the housing in a first index position of a plurality of index positions in response to a first compressive lod applied to the cutter; and a motivator to disengage the indexing cog from the housing and position the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter, wherein the motivator comprises a fist spring that applies a force to the indexing cog along a central axis and a second spring that applies a moment to the indexing cog about a central axis.
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10. A method for cutter indexing, the method comprising:
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placing a cutter in physical communication with an indexing cog; applying a first compressive load to an external surface of the cutter in a direction substantially along a rotational axis of the cutter; interlocking the indexing cog with a housing in a first index position of a plurality of index positions in response to the first compressive load, wherein the housing is located in a drill bit; disengaging the indexing cog from the housing; and positioning the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter. - View Dependent Claims (11, 12, 13, 14, 15, 20)
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16. A system comprising:
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a drill bit; a housing association with the drill bit; an indexing cog in physical communication with a cutter and interlocking with the housing in a first index position of a plurality of index positions in response to a first compressive load applied to a surface of the cutter that is located external to the housing and in a direction substantially along a rotational axis of the cutter; a motivator configured to disengage the indexing cog from the housing and position the indexing cog to interlock with the housing at an initial second index position in response to a removal of the compressive load from the cutter. - View Dependent Claims (17, 18)
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Specification