13 3/4" FSA515G , Rubber Sealed Roller Bearing , With Gage
Protection , TCI Tricone Bit , IADC 515
RECOMMENDED DRILLING PARAMETERS FOR APPLICATION
Types & IADC Code | 415 | 435 445 | 515 525 | 535 545 | 615 625 | 635 |
| WOB | KN/mm (Bit Dia.) | 0.35~0.95 | 0.35~0.95 | 0.4~0.7 | 0.4~0.7 | 0.45~1.1 | 0.5~1.2 |
Lb/in. (Bit Dia.) | 2000~5428 | 2000~5428 | 2285~4000 | 2285~4000 | 2571~6285 | 2857~6857 |
| Rotation Speed (Rpm) | 150~60 | 150~60 | 140~80 | 120~80 | 110~60 | 100~50
|
The above chart represents commonly available sizes and types, we
do produce other sizes and types of rock bits which do not appear
on this list. Please contact us for more information.
Lubricants
High drilling temperatures and high pressures in the lubrication
system, together with the potential of exposure to water and
chemicals, require high performance from lubricants. Most bit
lubricants are specially formulated. Leading bit manufacturers
employ scientists to develop and test lubricants. Better drill-bit
lubricants are stable to temperatures > 300°F, and many function
normally at temperatures down to ≈0°F. They are hydrophobic (repel
water) and retain their stability if water penetrates the bit.
Quality lubricants are also resistant to chemicals commonly found
in drilling fluids, are environmentally safe, and do not contain
the lead additives that have traditionally helped resist high
pressures.
O-rings
Donut-shaped O-rings are used in many roller-cone bit applications.
O-rings are manufactured from elastomers (synthetic rubbers) that
withstand the temperatures, pressures, and chemicals encountered in
drilling environments. They are a traditional, but still
consistently reliable, seal system.
An O-ring is installed in a seal gland to form a seal system. The
gland holds the O-ring in place and is sized so that the O-ring is
compressed between the gland and the bearing hub at which sealing
is required. It presses the interior wall of the O-ring against the
hub and the exterior diameter of the O-ring against the gland.
These latter forces prevent the seal from turning in the gland and
experiencing wear on the outer surfaces by rotational contact with
the gland.
