Hexagonal Kelly

Hexagonal Kelly Kelly is located in the top of the drill string, with square and hexagonal. In rotary drilling, when it is drilling, kelly connected with square bushing and rotary bushing, transfer the ground rotary torque to Heavy Weight Drill Pipe and to drive the drill bit,bearing the weight of the drill string.In the drilling of the turbine and screw, the weight of the drill string and the counter torque are supported. We are a square Kelly manufacturer in China, our company has 2 sucker rod workshops, 3 production lines. We guarantee on-time delivery, No middleman! Square Kelly Specification: Specification Drive part length Overall length Drive part Upper internal threaded joint Lower external threaded joint Inner diameter StandardLD SelectionLD Standard  Selection Square sizeDFL Across cornerDC Across cornerDCC RadiusRC RadiusRCC Eccentric hole minimum wall thickness Screw thread specification and  left rotate type Outside diameter Chamfering diameter Thread specification and type Outside diameterDLR LengthLL Chamfering diameterDF Standard Selection Standard Selection  DU length LU Standard DF Selection DF 63.5 （2½） 11280   12190   63.5 83.3 82.55 7.9 41.3 11.43 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC26(23/8IF) 85.7 508 82.9 31.8 76.2 3 11280   12190   76.2 100 98.43 9.5 49.2 11.43 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC31(27/8IF) 104.8 508 100.4 44.5 88.9 （3½） 11280   12190   88.9 115.1 112.7 12.7 56.4 11.43 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC38(3½IF) 120.7 508 116.3 57.2 108 （4¼） 11280 15540 12190 16460 108 141.3 139.7 12.7 69.9 12.07 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC46(4IF) 158.8 508 145.3 71.4 108 （4¼） 11280 15540 12190 16460 108 141.3 139.7 12.7 69.9 12.07 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC50(4½IF) 161.9 508 154 71.4 133.4 （5¼） 11280 15540 12190 16460 133.4 175.4 171.45 15.9 85.7 15.88 （65/8）REG   196.9   406.4 186.1   5½FH 177.8 508 170.7 82.6 133.4 （5¼） 11280 15540 12190 16460 133.4 175.4 171.45 15.9 85.7 15.88 （65/8）REG   196.9   406.4 186.1   NC56 177.8 508 170.7 82.6 Hexagonal Kelly Specification mm（in): Specification Drive part lengthти длины Overall length Drive part Upper internal threaded joint Lower external threaded joint Inner diameter StandardLD SelectionLD Standard Selection Square sizeDFL Across cornerDC Across cornerDCC RadiusRC RadiusRCC Eccentric hole minimum wall thickness Screw thread specification and  left rotate type Outside diameter Chamfering diameter Thread specification and type Outside diameterDLR LengthLL Chamfering diameterDF Standard Selection Standard DC Selection  DU length LU Standard DF Selection DF 63.5 （2½） 11280   12190   76.2 85.7 85.73 6.4 42.9 12.1 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC26(23/8IF) 85.7 508 82.9 31.8 76.2 3 11280   12190   88.9 100.8 100 6.4 50 13.3 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC31(27/8IF) 104.8 508 100.4 44.5 88.9 （3½） 11280 15540 12190 16460 108 122.2 121.44 9.9 60.7 15.9 （65/8）REG (4½)REG 196.9 146.1 406.4 186.1 134.5 NC38(3½IF) 120.7 508 116.3 57.2 108 （4¼） 11280 15540 12190 16460 133.4 151.6 149.86 9.5 75 15.9 （65/8）REG - 196.9 - 406.4 186.1 - NC46(4IF) 158.8 508 145.3 71.4 108 （4¼） 11280 15540 12190 16460 133.4 151.6 149.86 9.5 75 15.9 （65/8）REG - 196.9 - 406.4 186.1 - NC50(4½IF) 161.9 508 154 71.4 133.4 （5¼） 11280 15540 12190 16460 152.4 173 173.02 9.5 86.5 15.9 （65/8）REG - 196.9 - 406.4 186.1 - 5½FH 177.8 508 170.7 82.6 133.4 （5¼） 11280 15540 12190 16460 152.4 173 173.02 9.5 86.5 15.9 （65/8）REG - 196.9 - 406.4 186.1 - NC56 177.8 508 170.1 82.6   Steel Mark Chemical Composition% C Si Mn P S Cr Mo Cu Al 4145H 0.42～0.48 0.15～0.35 0.90～1.20 ≤0.03 ≤0.03 0.90～1.20 0.15～0.25 ≤0.2 0.025～0.045 Other Elements：N≤0.015，Ni≤0.5 Mechanical Property: Mechanical Property Outside Diameter Range Yield Strength Tensile Strength ElongationA% HB Charpy impact Akv  J mm in MPa Psi MPa Psi 79.4～171.4 3-1/8～6-3/4 ≥758 ≥110000 ≥965 ≥140000 ≥13 285～341 ≥54 177.8 7 ≥689 ≥100000 ≥930 ≥135000 ≥13 285～341 ≥54 Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand