Combination bit for coking oven
This patent describes a apparatus for cutting coke from a generally cylindrical coking oven having a given diameter. It comprises: a cutting bit having a generally cylindrical body portion, a first set of cutting elements extending from the body portion and arranged for drilling a pilot hole which has a first relatively small diameter through the coke in the coking oven, wherein the first set of cutting elements comprises hydraulic jet nozzles extending in a direction 11{degrees} from parallel to a longitudinal axis of the body portion of the cutting bit in a first plane; the cutting bit also having a second set of cutting elements extending from the body portion and arranged for cutting a large hole which has a second relatively large diameter through the coke in the coking oven; manually operable control means mounted on the cutting bit for switching operability of the cutting bit from the first set of cutting elements to the second set of cutting elements, the control means being manually operably by a single workman upon removal of the cutting bit from the coking oven.
- Assignee:
- Conoco Inc., Ponca City, OK (USA)
- Patent Number(s):
- US 4923021; A
- Application Number:
- PPN: US 7-292290A
- OSTI ID:
- 7092615
- Resource Relation:
- Patent File Date: 30 Dec 1988
- Country of Publication:
- United States
- Language:
- English
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