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Rotary KellyKelly is the drive part of whole drill string, it transmit the torsional energy from the rotary table to the bit in the bottom of the hole. Threads is phosphated, and each Kelly is furnished with a pressed steel thread protectors. Kelly shall be either square or hexagon and conform to the size and dimensions as per API Standard.Material: AISI 4145H-Mod.Standard: API 7-1 and NS-1Type: Square Kelly and hexagonal KellyPackage: in a protective steel-cased scabbardPlease specify when ordering:•Kelly type: Square Kelly or Hexagonal Kelly;•Nominal size and overall length;•Upper and lower Connections.Technical Parameters--Rotary KellyNom Size (in)Top Connection(LH)Bottom ConnectionI.D.(in)Drive Section(in)Standard O.D.(in)Optional O.D.(in)Square O.D.(in)Hex. O.D.(in)SquareHex.AB2 1/26 5/8REG 7 3/44 1/2REG 5 3/4NC26 85.71 1/43 2/736 5/8REG 7 3/44 1/2REG 5 3/4NC31 4 1/8NC26 3 3/81 3/41 1/443 3/83 1/26 5/8REG 7 3/44 1/2REG 5 3/4NC38 4 3/4NC31 4 1/82 1/41 3/44 1/24 4 1/46 5/8REG 7 3/44 1/2REG 5 3/4NC46 6 1/4NC38 4 3/42 13/162 1/45 9/164 25/326 5/8REG 7 3/44 1/2REG 5 3/4NC50 6 3/8NC38 4 3/42 13/162 1/45 9/164 25/32 5 1/46 5/8REG 7 3/45 1/2FH 7NC46 6 1/43 1/43766 5/8REG 7 3/4NC56 7NC50 6 3/83 1/43 1/476 66 5/8REG 7 3/45 1/2FH 73 1/26 13/166 5/8REG 7 3/4NC56 73 1/26 13/16If you have any further requirements, please feel free to contact us by sales@sxgtpm.com
