Specifications

spiral drill collars:
1.Meeting to API7-1
2.OD:3 1/8"-11"
3.Length:5"-31"

spiral drill collars

 

1.Meeting to API7-1
2.OD:3 1/8",3 1/2",4 1/8", 4 3/4",5",6",6 1/4",6 1/2",6 3/4",7",7 1/4",7 3/4",8",81/4",9",91/2",9 3/4",10",11"

3.Length:5"-31"

Drill collars are made of ANSI4137 ,4145H,4145HM alloy steel.