Chevron succeeds with extended-nozzle bits in west Texas
Journal Article
·
· Pet. Eng. Int.; (United States)
OSTI ID:5377612
Performance of a conventional three-cone, two-type insert bit with extended nozzles was compared to that of a similar bit without nozzle extensions and with previous mill tooth bit runs. Bit runs from 46 surface holes were studied. The extended-nozzle insert bit achieved average penetration rates 38% higher than the regular insert bit and 45% higher than mill tooth bits. Results are presented of 19 surface holes which have been drilled with four extended-nozzle insert bits. These runs were compared with nine surface holes drilled with two of the same type insert bits without extended nozzles along with 14,447 ft of surface hole drilled with 11 mill tooth bits. A weighted average was used for mill tooth bit performance since several runs studied were very poor. It is shown that extended-nozzle bits will drill at least five surface holes before being discarded. Cost comparisons are also presented. 2 refs.
- Research Organization:
- Chevron USA Inc, Snyder, Tex
- OSTI ID:
- 5377612
- Journal Information:
- Pet. Eng. Int.; (United States), Journal Name: Pet. Eng. Int.; (United States) Vol. 54:1; ISSN PEEID
- Country of Publication:
- United States
- Language:
- English
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