A Series Roller Cone Drilling Bits
A series bit for air drilling
In hard formation with less water content, formations with serious leakage or with low pressure, in order to achieve higher drilling speed, air drilling process is usually adopted. Problems such as short service life, low ROP, weak gage protection ability etc. appear frequently for conventional cone bit in air drilling conditions.
Aim at air drilling condition, ORCAER has developed A series bit for air drilling which has structure features of center jet hole and enhanced head O.D .. The bit with these features is suitable for drilling at air drilling application to increase observably ROP and life of the bit.
The size range of A series bit is 5 7/8 – 12 3/8 inch and its IADC code is 537 – 627.
Long service life
Metal face seal journal bearing
High stress spots are eliminated by new bearing enhancement process and the design requirements of high accuracy is obtained with high precision mach ineries to ensure good impact resistance load capability and high-temperature resistant property.
High ROP
High effective cutting capability can be obtained by optimized cutting structure.
According to characteristics of air drilling, inserts of highly wear resistant and high toughness as well as optimized cutter shape are utilized. The wear-resistance and anti-breakage ability of inserts can help to keep constant aggressiveness and increase ROP.
Fine cuttings is suitable for upward flow of cuttings in air drilling to reduce
repeated breakage and improve drilling efficiency by optimized arrangement
density and height of cutters.
Jet system with high efficiency
Three side jet holes and one center jet hole are made up of a jet structure. Unique center hole will spurt air flow into bottom hole center directly, so that increase capacity of cleaning well bore, expedite upward flow of cuttings and cool cone and bearing.
Strong gage protection
Appropriately added cutters number of heel row and adopted inserts with good wear-resistance to enhance gage protection. Widened & thickened hardfacing on shirttail to protect the seal.
Full head OD protection to improve further capability of gage protection.
(Optional features: D、H、K、X、YI)
Bit type
A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627 A537、A547、A617、A627
