Square & Hex Kelly
The Kelly is a key component in the rotary drilling system, transferring rotary motion from the rotary table or top drive to the drill string. It's a heavy square or hexagonal steel pipe that fits into the Kelly bushing and passes through the rotary table, enabling efficient torque transmission and fluid circulation.
Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. KAIDI Kelly is a long square or hexagonal, precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.
Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspections are carried out before, during and after each machining operation. The flats are precision-milled to API specifications. All milling processes are performed on specially designed rigid Kelly mills to ensure tight tolerances and high quality drive sections. Each KAIDI Kelly is furnished with a pressed steel thread protectors.
Features and Benefits
Manufactured from AISI 4145H-modified, fully heat-treated alloy steel with a Brinell hardness range of 285-341BHn and a minimum average Charpy impact value of 40 ft-lbs;
Ends and drive sections, IDs and connections machined and inspected to API
specifications;
Ultrasonic inspection is performed on all sections;
Shipped in a protective steel-cased scabbard;
When ordering please specify:
Kelly type (square or hexagonal);
nominal size and overall length;
Upper and lower connections.
Top upset with left- handed connection
Square & Hex Kelly
The Kelly is a key component in the rotary drilling system, transferring rotary motion from the rotary table or top drive to the drill string. It's a heavy square or hexagonal steel pipe that fits into the Kelly bushing and passes through the rotary table, enabling efficient torque transmission and fluid circulation.
Kelly is main driver of the whole drill string. It transmits torsional energy from the rotary table through the drill string to the bit at the bottom of the hole. KAIDI Kelly is a long square or hexagonal, precision machined heavy steel bar that is supported by the swivel through the rotary table and is connected to the first joint of drill pipe in the drill string.
Straightness of the kelly is very crucial in the manufacturing process, thus straightness inspections are carried out before, during and after each machining operation. The flats are precision-milled to API specifications. All milling processes are performed on specially designed rigid Kelly mills to ensure tight tolerances and high quality drive sections. Each KAIDI Kelly is furnished with a pressed steel thread protectors.
Features and Benefits
Manufactured from AISI 4145H-modified, fully heat-treated alloy steel with a Brinell hardness range of 285-341BHn and a minimum average Charpy impact value of 40 ft-lbs;
Ends and drive sections, IDs and connections machined and inspected to API
specifications;
Ultrasonic inspection is performed on all sections;
Shipped in a protective steel-cased scabbard;
When ordering please specify:
Kelly type (square or hexagonal);
nominal size and overall length;
Upper and lower connections.
Top upset with left- handed connection
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