Specifications

stepped drag bits:
1.Type:chevron and step
g:2,3,4 wings

stepped drag bits

 

 

Size:4 1/2",5",5 1/2",5 3/4",6 5/8",7"

connection:NC26 3 3/8TBG,NC31 2 7/8TBG,NC38 3 1/2 TBG

 

Drag Bit is a common tool which used to rework operation, for drilling cement plug and sinker drilling sand bridge, salt bridge, scraping off the dirt of casing wall and hard wax and some mineral crystallization. Still can scraping well hole, making the wall bright and clean, it may used to drilling ahead in bushing and side track (Can destroy the keyway is formed when side track) or drilling and rubbing the mat of perforating shell, etc.

 

Casing Size	O.D. mm(inch)	OAL mm(inch)	Connection API
4-1/2	92~95(3-5/8)~3-3/4)	300(11-13/16)	NC26  3-3/8TBG
5	105~107(4-1/8~4-1/4)	350(13-3/4)	NC31  2-7/8TBG
5-1/2	114~118(4-1/2~4-5/8)	350(13-3/4)	NC31  2-7/8TBG
5-3/4	119~118(4--11/16~5-3/64)	350(13-3/4)	NC31  2-7/8TBG
6-5/8	136~148(5-11/32~5-13/16)	380(14-31/32)	NC31  2-7/8TBG
7	146~158(5-3/4`6-7/32)	400(15-3/4)	NC38  3-12TBG