API Standard Drilling Tools 8 Inch Drag Drill Bits For Water Well Drilling

API Standard Drilling Tools 8 Inch Drag Drill Bits For Water Well Drilling

Application

The drag bit is the oldest rotary tool still used by the drilling industry. These bits are currently manufactured in several different designs with various cutler blade quantities and shapes. The cutting blades arc integrally made with the bit body or are fixed to it and rotate as a unit with the drillstem. This bit is used primarily in soft and gummy formations. Optimum performance is attained by arranging the hydraulic equipment and selecting nozzle sizes so maximum available hydraulic horsepower is expended at the bit.

Chevron Drag Bit
Drill more abrasive formations, like soft sandstones and shales, with a chevron drag bit.
The cutting structure is more durable than the step drag bit but will also penetrate more slowly.
For best drilling results, maintain rotary table speeds between 50 and 60 rpm with light to medium weight on bit (WOB). Harder formations require more WOB.

Characteristics

All sizes are generally 3 wings and standard design;

Any size of 4 wings or chevron type is upon customer’s request;

All sizes connection type are AROD,NROD or standard API thread;

Any special size and design is upon customer’s request.

Drag bits diameter:76mm to 445mm;
Step Drag Drill Bits thread sizes: :2 3/8” API Reg, 3 1/2” API Reg, 4 1/2” API Reg, 6 5/8” API Reg, etc;

Specification

Packing& Delivery

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