Antiwhirl PDC bits increased penetration rates in Alberta drilling. [Polycrystalline Diamond Compact]
- Baker Hughes Inteq, Calgary, Alberta (Canada)
- Petro-Canada, Calgary, Alberta (Canada)
The antiwhirl PDC bits and an inhibitive mud system contributed to the quicker drilling of the time-sensitive shales. The hole washouts in the intermediate section were dramatically reduced, resulting in better intermediate casing cement jobs. Also, the use of antirotation PDC-drillable cementing plugs eliminated the need to drill out plugs and float equipment with a steel tooth bit and then trip for the PDC bit. By using an antiwhirl PDC bit, at least one trip was eliminated in the intermediate section. Offset data indicated that two to six conventional bits would have been required to drill the intermediate hole interval. The PDC bit was rebuildable and therefore rerunnable even after being used on five wells. In each instance, the cost of replacing chipped cutters was less than the cost of a new insert roller cone bit. The paper describes the antiwhirl bits; the development of the bits; and their application in a clastic sequence, a carbonate sequence, and the Shekilie oil field; the improvement in the rate of penetration; the selection of bottom hole assemblies; washout problems; and drill-out characteristics.
- OSTI ID:
- 5395297
- Journal Information:
- Oil and Gas Journal; (United States), Journal Name: Oil and Gas Journal; (United States) Vol. 91:27; ISSN OIGJAV; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
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