US3850256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bit with one piece body and depending arms
Assignee: Dresser Industries Inc
•
Filing: 1973-09-21
•
Granted: 1974-11-26
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Expires: 1993-09-21
Abstract
Abstract A rotary rock bit is formed from a multiplicity of individual segments. At least one depending arm body is positioned in abutting relationship to a one piece bit body and welded thereto. A rotatable cutter is mounted upon the arm body and bearings are provided between the arm body and the cutter. A lubricant reservoir in the one piece body contains lubricant that is applied to the bearings between the cutter and the bearing pin. Passages extend from the lubricant reservoir through the arm body to the bearing area. A drilling fluid passage extends through the one piece body to allow a drilling fluid to be circulated through the bit during the drilling operation.
Inventors
- 👤 R Mcqueen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/18; E21B10/20; E21B10/22; E21B10/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A rotary rock bit, comprising: a main body having a single main body parting face, said main body parting face having a planar main body surface; at least one arm body having an arm body parting face, said arm body parting face having a planar arm body surface with said arm body parting face in abutting relationship with said main body parting face; and a cutter rotatably mounted upon said arm body.
Claim 2
Dependent Claim
72 words
A rotary rock bit, comprising: a main body having a single main body parting face, said main body parting face having a planar main body surface; at least one arm body having an arm body parting face, said arm body parting face having a planar arm body surface with said arm body parting face in abutting relationship with said main body parting face; and a cutter rotatably mounted upon said arm body.
Claim 3
Dependent Claim
50 words
The rotary rock bit of claim 1 including bearing means between said cutter and said arm body, lubricant supply means in said main body for supplying lubricant to said bearing means and passage means in said arm body for transmitting lubricant from said lubricant supply means to said bearing means.
Claim 4
Dependent Claim
16 words
The rotary rock bit of claim 2 wherein said lubricant supply means is a lubricant reservoir.
Claim 5
Dependent Claim
185 words
A rotary rock bit, comprising: a main body including a single horizontally extending parting face, said parting face having a horizontal planar surface; at least one arm body including a horizontally extending arm body parting face, said arm body parting face having a horizontal planar surface with said arm body parting face in abutment with said at least one main body parting face; means for connecting said at least arm body to said main body; at least one cutter rotatably mounted upon said arm body; bearing means between said cutter and said arm body; seal means between said cutter and said arm body; lubricant source means in said main body for supplying lubricant to said bearing means; lubricant passage means extending through said arm body for channeling lubricant from lubricant source means to said bearing means; drilling fluid passage means extending through said main body; an aligning pin projecting from said arm body into said drilling fluid passage means with said aligning pin having a passage therethrough connecting said lubricant passage means and said drilling fluid passage means; and a connection on said main body.
Claim 6
Dependent Claim
185 words
A rotary rock bit, comprising: a main body including a single horizontally extending parting face, said parting face having a horizontal planar surface; at least one arm body including a horizontally extending arm body parting face, said arm body parting face having a horizontal planar surface with said arm body parting face in abutment with said at least one main body parting face; means for connecting said at least arm body to said main body; at least one cutter rotatably mounted upon said arm body; bearing means between said cutter and said arm body; seal means between said cutter and said arm body; lubricant source means in said main body for supplying lubricant to said bearing means; lubricant passage means extending through said arm body for channeling lubricant from lubricant source means to said bearing means; drilling fluid passage means extending through said main body; an aligning pin projecting from said arm body into said drilling fluid passage means with said aligning pin having a passage therethrough connecting said lubricant passage means and said drilling fluid passage means; and a connection on said main body.
Claim 7
Dependent Claim
16 words
The rotary rock bit of claim 4 wherein said lubricant source means is a lubricant reservoir.
References Cited (Backward Citations)
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US1762504A
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US1764854A
Cited
US1992992A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |