HA Series
Bearing Type: Journal Bearing
Seal Type: Rubber O-ring Sealed

HA_image

HA series bits can stand comparatively high bit weight under normal rotary speeds. The O-ring seal is made of wear resistance high saturated buna-N. The increased seal section and added sealing flange in the cone sealing area increase the reliability of the seal.

HJ Series
Bearing Type: Journal Bearing
Seal Type: Metal Face Sealed

HJ_Image

HJ series bits use metal face seal (MFS) — the most advanced sealing technology in the world. This series of bit can perform consistently in high speed drilling applications, and is the ideal tool for horizontal and directional drilling.

High precision metal rings are used to form the bearing axial dynamic seal. Two elastic rubber energizers are separately located in the head and cone sealing areas to form a static seal. This type of seal reduces the friction force on the sealing surfaces by 70% to 80%. With the reduction of the friction heat and friction force, compared with the conventional rubber seal bits, the average working life (total drilling hours) can be increased by 35%.

GA Series
Bearing Type: Roller Bearing
Seal Type: Rubber O-ring Sealed

GJ_image

GA series bits are an economical tool for high RPM drilling application.

The roller sealed bearing structure, with the roller groove recessed into the cone, increases the size of journal, which can bear high WOB and accommodate high RPM drilling. Thrust bearing couple surfaces are treated with anti-friction and hardening processes, which increase both the loading capacity and the seizure resistance.

GJ Series
Bearing Type: Roller Bearing
Seal Type: Metal Face Sealed

GA_image

GJ series bits use metal face seal(MFS)–the most advanced sealing technology in the world. This series of bit can perform consistently in high speed drilling applications.

High precision metal rings are used to form the bearing axial dynamic seal. Two elastic rubber energizers are separately located in the head and cone sealing areas to form a static seal. This type of seal reduces the friction force on the sealing surfaces by 70% to 80%. With the reduction of the friction heat and friction force, GJ series bits have excellent features applicable to high RPM drilling, Compared with the conventional rubber seal bits, the total drilling hours can be increased by 35%. The position of the rollers in the recesses of the cone ID enlarge the bearing and roller size and reduce the sealing diameter, which decreases the rotary speed and friction heat of the sealing surfaces and improves the loading capacity of the bearing.

W Series
Bearing Type: Roller Bearing
Seal Type: Non-Sealed

W series bits are an economical tool for high RPM drilling as well as geothermal drilling applications.

W series bits have the following types of bearing structures: roller-ball-roller-thrust for bits larger than 12-1/4″ and roller-ball-journal pilot pin-thrust for bits smaller than 12-1/4″. With the non-sealed bearing, the drilling fluid can go directly into the bearing cavity to cool the bearing, which is applicable for geothermal drilling