Two piece down hole drill chuck
A two piece drill chuck for a downhole drill is described of the type comprising: a cylindrical casing supported on a drill string for driving support therefrom; and a drill bit partly surrounded by the extending downwardly from the casing. The improvement comprises: a mounting chuck means of hollow cylindrical form for securing the drill bit to a downhole drill. The chuck mounting means is interspaced between the casing and the drill bit and being in driving engagement with the casing and the drill bit. The means has a lower portion extending downwardly beyond the lower end of the casing; and a chuck wear collar of hollow cylindrical form concentric about and covering the entire otherwise exposed lower portion of the mounting chuck means. The chuck wear collar has an upwardly facing surface in engagement with the casing and a downwardly facing surface in engagement with the drill bit.
- Assignee:
- Ingersoll-Rand Co., Woodcliff Lake, NJ
- Patent Number(s):
- US 4706764
- OSTI ID:
- 5695815
- Resource Relation:
- Patent File Date: Filed date 1 Aug 1986
- Country of Publication:
- United States
- Language:
- English
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