Tigerrig HJ HJT Series Metal Sealed Bit With Journal Bearing
Production Description:
HJ/HJT series bit adopts metal seal with journal bearing, which can drill stably with higher rotary speed.
1.The size range of HJ/ HJT series bit is 7 1/2 - 18 7/8 inch and its IADC code is 437 – 547.
Main structure features:
1.Metal face seal journal bearing. New processes of head bearing hard facing and cone bearing silver plating are used to improve the load capacity, anti-galling ability and stability of the bearing.
2.Various shapes of inserts can be equipped on this series of bits, including scoop inserts, wedge inserts, conical- spherical inserts and double spherical inserts, etc. Drilling process & formation and bit are efficient integrated by scientific insert shape selection to realize safety and high efficient drilling.
3.A row of inserts is added between gage row and heel row of HJ bit to trim borehole wall and protect cone shell, and as a result, HJT series bit is formed.
Specifications
Bit size
Bit type
in
mm
7 7/8
200.0
HJ437G、HJ447G、HJ517G、HJT537G
8 1/2
215.9
HJT417G、HJT437G、HJT447G、HJ517G、HJT517G、HJT527G、HJT537G、HJT547G、HJT547JY
8 3/4
222.3
HJ437G、HJ447G、HJ517G、HJT527G
9 1/2
241.3
HJ437G、HJ447G、HJ517G、HJT517G、HJ537G、HJT537G、HJ547G、HJT547G
9 7/8
250.8
HJ437G、HJT437G、HJ517G
10 1/2
266.7
HJT517GK、HJT537GK、HJT547GK
10 5/8
269.9
HJT517G
12
304.8
12 1/4
311.2
HJT417G、HJ437G、HJT437G、HJT447G、HJ517G、HJT517G、HJ537G、HJT537G
13 1/2
342.9
HJT517GK、HJT537GK、HJT547G
14 3/4
374.7
17 1/2
444.5
HJ517G、HJT517G、HJ527G
18 7/8
479.4
HJT517G、HJT537G