Drag drill bit having improved arrangement of cutting elements
This patent describes a rotary drill bit of the drag type for drilling a bore hole in an earth formation. The generally cylindrical bit body having a fluid passage therein adapted to be connected to a drill string for rotation therewith about a longitudinal axis and to receive drilling fluid from the drillstring; blades on the bit body extending in a generally spiral pattern from adjacent the center of the bit body to the outer periphery thereof and separated from each other by deep groves; each blade having a curved leading side with respect to the direction of rotation extending generally to the outer periphery of the generally cylindrical bit body, a curved trailing side spaced from the leading side, and an outer surface connecting the leading and trailing sides to define the lower surface and crown of the bit body. The surface providing a relatively long length mounting area thereon for cutting elements.
- Assignee:
- Reed Tool Co., Houston, TX
- Patent Number(s):
- US 4848489
- Application Number:
- PPN: US 7270431A
- OSTI ID:
- 5455476
- Resource Relation:
- Patent File Date: 7 Nov 1988
- Country of Publication:
- United States
- Language:
- English
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