12 1/4" FA517G, Tricone Rock Bit, Water Well Drilling Bit , Medium Hard Formation , IADC 517

RECOMMENDED DRILLING PARAMETERS FOR APPLICATION

Bearings

- Functions:

• Support radial load
• Support thrust or axial loads
• Secure the cone on the leg

- Supporting loads is achieved by outer and nose bearing

- Ball and friction bearings secure the cone on the leg

- Two different bearing are available: antifriction and friction

- Antifriction bearings or roller are two types: Roller-ball-roller (RBR), and roller-ball-friction

- RBR, nose roller; intermediate ball; and outer roller

- The ball secure the cone

- Size influenced by journal angle and cone size

- RBR suffers from spalling of the races of the pin

- RBR bit have short life than Friction Bearing Bit

- Normally used with bit with diameter greater than 12.25 in with adequate space and in situation where high rotary speed is required

Hejian City Feilong Retop Rock Bit Manufacture Co., Ltd. is established in 1992 and located in Hebei Province, China. Integrated with Beijing Feilong International Trade Co., Ltd. and Beijing Superior Drilling Equipment Co., Ltd. , the company has involved into a comprehensive enterprise integrating production, R&D and distribution of tricone bits, PDC bits, trenchless and rotary drilling tools.

The company serves the customers in oil & gas drilling, mining, exploration, HDD drilling and rotary drilling with covering a complete product line.

The company covers an area of 36,000 square meter and has more than 200 employees, including more than 100 technicians. The company has equipped with contemporary advanced processing equipment of processing and detecting and testing instruments. The company has obtained the certification of the quality system: ISO 9001, ISO 14001, OHSAS 18001 and mostly important API 7-1.

The company’s annual production of various drilling tools is over 10,000 sets, which exported to over 20 countries and regions. We, FeiLong ReTop ( FLRT ) are willing to cooperate with friends at home and abroad to make joint development and contribute to global energy development and urban infrastructure development.