October 1999
Industry At A Glance
99-10_casing-tarr_T1.html (Oct-1999)
A monthly magazine offering industry news, statistics and technical editorial to the oil and gas drilling, exploration and production industry.
Table 1. Proposed classification of SWD options | ||||||||
NCR 1 | NCR 2 | CR 1 | CR 2 | CR 3 | CR 4 | CR 5 | CR 6 | CR 7 |
No Casing Rotation (NCR) | Casing Rotated* (CR) | |||||||
Casing/liner to running tool, drill pipe to surface | Casing to surface | Casing/liner to running tool, drill pipe to surface | Casing to surface | |||||
Bit and under-reamer turned by motor assy. run on inner rstring. swab cup above motor assy. Assy. pulled on inner string. | Bit and under-reamer turned by motor assy. latched into bottom joint of casing string. Assy. pulled on wireline. | Bit and under-reamer turned by motor assy. run on inner string below casing spear. Assy. pulled on inner string. | Bit and free rotating casing. shoe core bit sub turned by motor run on inner string. Bit pulled on inner string. | Bit and fixed casing shoe core bit (or under-reamer) both rotated from surface. Bit pulled on inner string or left downhole. | Bit and casing shoe core bit both turned by rotation from surface. Bit pulled on wireline or left downhole. | Casing shoe core bit turned from surface. Steerable motor assy. latched in casing Assy. pulled on wireline. | Bit, under-reamer and casing shoe core bit turned by surface rotation only. Assy. pulled on wireline. | Casing shoe core bit with steerable motor assy. and under-reamer latched in casing Assy. pulled on wireline. |
Cementing possible before POH with bit. | Cementing possible only after POH with bit. | |||||||
Status, August 1999 | ||||||||
Planned | Built & run | Built & run | Built & run | Built & run | Built & run | Concept only | Built & tested | Built & tested |
20-in. casing, Shell Deep Water Team | 13-in. casing, Unocal Indonesia | 11 3/4-in. liner, Amoco Hod | 7-in. & 9 5/8-in. liner, Mobil Arun, Amoco Valhall | California Ops. Mobil Arun & High Island | 5 1/2-in. & 7-in. liner Amoco Valhall (16-in. concept) | Up to 16 in. | 4 1/2 in., 5 1/2 in., 7 5/8 in., 9 5/8 in. Tesco test well | 5 1/2-in., 7-in. csg. Tesco test well sidetracks |
* Speed depends on whether motor included. |
FROM THE ARCHIVE
Copyright © 1999 World Oil
Copyright © 1999 Gulf Publishing Company
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