Degradation assembly
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Ronald B. Crockett, Scott Dahlgren
Life of this patent
Estimating the term…
Abstract
A degradation assembly for use with a driving mechanism includes a working portion coupled to a shank assembly. The working portion has an impact tip brazed to a working end of a carbide extension. The carbide extension has a cavity formed in a base end that is adapted to engage with a shank and a locking mechanism of the shank assembly. The shank has an outer surface proximate a first end which is receivable within the cavity of the carbide extension. The locking mechanism has a radially extending catch configured to engage with the cavity and couple the shank assembly to the working portion. The shank has an outer surface proximate a second end which is adapted to be press-fitted within a recess of a driving mechanism.
Claims21
A degradation assembly for use with a driving mechanism, the degradation assembly comprising:
- a working portion including an impact tip attached to a working end of a carbide extension, the carbide extension having a cavity formed in a base end, the cavity being adapted to interlock with a shank assembly of the cutting element assembly;
- and
- a shank assembly including:
- a shank having a first end and a second end opposite the first end, the shank having a first outer surface proximate the first end being receivable into the cavity of the carbide extension, and a second outer surface proximate the second end being receivable into a recess of a driving mechanism with a press fit to secure the shank to the driving mechanism;
- and
- a locking mechanism slidably supported within a bore of the shank, the locking mechanism having a locking head projecting from the first end of the shank and a locking shaft extending away from the locking head towards the second end of the shank, the locking head having a radially-extending catch configured to engage with the cavity to couple the shank assembly to the working portion.
A degradation assembly for use with a driving mechanism, said degradation assembly comprising:
- a carbide extension having a working end, a base end, and an extension cavity formed in said base end;
- an impact tip attached to said working end;
- a shank having a first end for insertion into said extension cavity and a second end opposite said first end for being press fit into a recess of said driving mechanism, said shank having a shank cavity formed at said second end and a bore extending from said shank cavity to said first end;
- and
- a locking mechanism including:
- a shaft extending from said shank cavity through said bore to said first end of said shank;
- a locking head attached to said shaft configured to fit in said extension cavity;
- a radially-extending catch mechanically associated with said locking head configured to engage with said cavity;
- and
- a tensioning mechanism for mechanical association with said shaft to tension said locking mechanism and lock said carbide extension to said first end of said shank.
A degradation assembly for use with a driving mechanism, said degradation assembly comprising:
- a working portion including an impact tip attached to a working end of a carbide extension, said carbide extension having a cavity formed in a base end opposite said working end;
- a shank having a first end, a second end opposite said first end and a bore extending from said first end to said second end, said first end being sized and shaped for insertion into said cavity, said second end being sized and shaped for being press fit into a recess of said driving mechanism;
- and
- a locking mechanism including a locking head formed at one end of a locking shaft, said locking shaft being slidably inserted within said bore with said locking head proximate said first end of said shank and said locking shaft extending away from the locking head towards said second end of said shank, and said locking head having a radially-extending catch configured to engage with said cavity to couple said working portion to said shank.
Dependencies are inferred from the claim text.