KELLY
The square and hexagonal Kelly is available up to 46
feet long. The Kelly is made from 4145H modified alloy bars that are
quenched and tempered full length. A hardness range of 285 to 341 BHN
and a minimum impact value of 40ft-lbs are maintained one inch below
the surface at room temperature. All ends and center drive
sections-trepanned to provide true bores. They are drifted to API
specifications, and all connections are machined. The Kelly that we
supply is stamped with the API monogram.
Size and Type of Square Kelly (in)
| Kelly Size | Length of Drive Section m |
Length Overall m |
Drive Section | ||||||||
| Standard L D |
Opt. L D |
Standard L |
Opt. L |
Across Flats D FL |
Across Corners E C |
Across Corners D CC |
Radius R C |
Radius R CC |
Min. Wall E CC . Bore t | ||
| 63.5 | (2 1/2) | 11280 | 12190 | 63.5 | 83.3 | 82.55 | 7.9 | 41.3 | 11.43 | ||
| 76.2 | (3) | 11280 | 12190 | 76.2 | 100.0 | 98.43 | 9.5 | 49.2 | 11.43 | ||
| 88.9 | (3 1/2) | 11280 | 12190 | 88.9 | 115.1 | 112.70 | 12.7 | 56.4 | 11.43 | ||
| 108.0 | (4 1/4) | 11280 | 15540 | 12190 | 16460 | 108.0 | 141.3 | 139.70 | 12.7 | 69.9 | 12.07 |
| 108.0 | (4 1/4) | 11280 | 15540 | 12190 | 16460 | 108.0 | 141.3 | 139.70 | 12.7 | 69.9 | 12.07 |
| 133.4 | (5 1/4) | 11280 | 15540 | 12190 | 16460 | 133.4 | 175.4 | 171.45 | 15.9 | 85.7 | 15.88 |
| 133.4 | (5 1/4) | 11280 | 15540 | 12190 | 16460 | 133.4 | 175.4 | 171.45 | 15.9 | 85.7 | 15.88 |
| Kelly Size | Upper Box Connection | Lower Pin Connection | Inside Diameter d | ||||||||||
| size and style LH | Outside Diameter | Bevel Diameter | Size and Style | Outside Diameter D LR |
Length L L |
Bevel Diameter D F | |||||||
| Standard | Opt. | Standard D U |
Opt. D U |
L U | D F | D F | |||||||
| 63.5 | (2 1/2) | (6 5/8) REG | (4 1/2) REG |
196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC26 (23/8IF) |
85.7 | 508 | 82.9 | 31.8 |
| 76.2 | (3) | (6 5/8) REG | (4 1/2)REG |
196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC31 (27/8IF) |
104.8 | 508 | 100.4 | 44.5 |
| 88.9 | (3 1/2) | (6 5/8) REG | (4 1/2)REG |
196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC38 (31/2IF) |
120.7 | 508 | 116.3 | 57.2 |
| 108.0 | (4 1/4) | (6 5/8) REG | (4 1/2)REG |
196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC46 (4IF) |
158.8 | 508 | 145.3 | 71.4 |
| 108.0 | (4 1/4) | (6 5/8) REG | (4 1/2)REG |
196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC50 (41/2IF) |
161.9 | 508 | 154.0 | 71.4 |
| 133.4 | (5 1/4) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | 5 1/2FH | 177.8 | 508 | 170.7 | 82.6 | |||
| 133.4 | (5 14) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | NC56 | 177.8 | 508 | 171.1 | 82.6 | |||
Size and Type of Hexagonal Kelly
| Kelly Size | Length of Drive Section m |
Length Overall m |
Drive Section | ||||||||
| Standard LD | Opt. LD | Standard L | Opt. L | Across Flats D FL | Across Corners E C | Across Corners D CC | CC | Radius R CC | Min. Wall E CC . Bore t | ||
| 76.2 | (3) | 11280 | 12190 | 76.2 | 85.7 | 85.73 | 6.4 | 42.9 | 12.1 | ||
| 88.9 | (3 1/2) | 11280 | 12190 | 88.9 | 100.8 | 100.00 | 6.4 | 50.0 | 13.3 | ||
| 108.0 | (4 1/4) | 11280 | 15540 | 12190 | 16460 | 108.0 | 122.2 | 121.44 | 9.9 | 60.7 | 15.9 |
| 133.4 | (5 1/4) | 11280 | 15540 | 12190 | 16460 | 133.4 | 151.6 | 149.86 | 9.5 | 75.0 | 15.9 |
| 133.4 | (5 1/4) | 11280 | 15540 | 12190 | 16460 | 133.4 | 151.6 | 149.86 | 9.5 | 75.0 | 15.9 |
| 152.4 | (6) | 11280 | 15540 | 12190 | 16460 | 152.4 | 173.0 | 173.02 | 9.5 | 86.5 | 15.9 |
| 152.4 | (6) | 11280 | 15540 | 12190 | 16460 | 152.4 | 173.0 | 173.02 | 9.5 | 86.5 | 15.9 |
| Kelly Size | Upper Box Connection | Lower Pin Connection | Inside Diameter d | ||||||||||
| Size and style, LH | Outside Diameter | Bevel Diameter | Size and style | Outside Diameter D LR | Length L L | Bevel Diameter D F | |||||||
| Standard | Opt. | Standard DC | Opt. DU | Length L U | Standard D F | Opt. D F | |||||||
| 76.2 | (3) | (6 5/8) REG | (4 1/2) REG | 196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC26 (2 3/8IF) | 85.7 | 508 | 82.9 | 31.8 |
| 88.9 | (3 1/2) | (6 5/8) REG | (4 1/2) REG | 196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC31 (2 7/8IF) | 104.8 | 508 | 100.4 | 44.5 |
| 108.0 | (4 1/4) | (6 5/8) REG | (4 1/2)REG | 196.9 | 146.1 | 406.4 | 186.1 | 134.5 | NC38 (3 1/2IF) | 120.7 | 508 | 116.3 | 57.2 |
| 133.4 | (5 1/4) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | NC46 (4IF) | 158.8 | 508 | 145.3 | 71.4 | |||
| 133.4 | (5 1/4) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | NC50 (4 1/2IF) | 161.9 | 508 | 154.0 | 71.4 | |||
| 152.4 | (6) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | 5 1/2FH | 177.8 | 508 | 170.7 | 82.6 | |||
| 152.4 | (6) | (6 5/8) REG | 196.9 | 406.4 | 186.1 | NC56 | 177.8 | 508 | 171.1 | 82.6 | |||
Order Instructions:
- Kelly type: Square or Hexagonal
- Working space and overall length
- upper and bottom connection size and type.
