Square/Hexagonal Rotary Kelly (Drill Kelly)

High Quality Square and Hexagonal Rotary Kelly For Oil-Field

Z03 Series     Z04 Series

Summary

• Kelly 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. The precision-machined kelly is a heavy square or hexagonal steel bar supported by the swivel through the rotary table and connected to the first joint of drill pipe in the drill string.
• Straightness is the key manufacturing process. Straightness is checked before, during and after each machining operation. Flats are precision-milled to API and NS-1 specifications. All milling is performed on specially designed rigid kelly mills. Each 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 285-341 and a minimum average charpy impact value of 40 ft-lbs;
• Ends and drive sections, IDs and connections machined and inspected to API and NS-1 specifications;
• Kelly bars ultrasonically inspected over full length and section;
• 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;

Specifications -- Rotary Kelly

Nom Size(in) Square Kelly Product Code Hexagonal Kelly Product Code Drive Section(in) A B 2 1/2 Z03-130000   3 1/4   3 Z03-130100 Z04-130000 3 3/8 3 3/8 3 1/2 Z03-130200 Z04-130100 4  7/16 4 4 1/2 Z03-130300 Z04-130200 5 1/2 4 4/5 Z03-130400 Z04-130300 5 1/2 4 4/5 5 1/4 Z03-130500 Z04-130400 6 3/4 5 29/32 Z03-130600 Z04-130500 6 3/4 5 29/32 6   Z04-130600   6 13/16   Z04-130700   6 13/16

In our factory, we can produce special-use machine tools for oil-field, Including CNC or Non-CNC Oil Country Lathe(Pipe Thread Lathe), CNC or Non-CNC Deep Hole Boring and Drilling Machine, CNC Deep Hole Honing Machine, etc.

Oil Pipe Thread Lathe

Deep Hole Machine