Simultaneous drilling and reaming with fixed blade reamers
Deep well drilling programs often require the use of multiple casings or liners. Designing these wells require compromises between using the smallest surface hole possible to minimize tubular costs and maintaining the largest hole possible to allow for contingencies and for the optimum completion design. The conflict between these two considerations can be resolved somewhat by nesting the casing strings with the minimum clearance between them. Unfortunately this often requires that the section drilled below a casing string be reamed to a larger diameter than the casing ID. The reaming process is often fraught with many inefficiencies. This paper describes a technique for simultaneously drilling and reaming with a bi-center reamer run on a stabilized assembly above a pilot bit. The successful use of the technique in three field wells is reported.
- OSTI ID:
- 166600
- Report Number(s):
- CONF-951002--
- Country of Publication:
- United States
- Language:
- English
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