IADC code:  116 117 12 6127 136 137 216 217 226 226 316 317 326 327 336 337 

                       115 125 135 215 225 235 315 325 335 114 124 214 314 111 121 131 346 347

 Available sizes: from 2 7/8 to 26” ( larger sizes for hole opener bit ,reamer bit )

Bearing type:  sealed bearing and non-sealed bearing

                       (The sealed bearing include:

                        the metal sealed journal bearing and the  rubber sealed journal bearing)

Formation or layer : soft ,medium soft ,hard,medium hard

Button size (extra features):  Button bit,saw teeth

                                              1) Y-Conical teeth  

                                              2) X-chisel teeth

                                              3)K- wide teeth

                                              4)G- Gague protection

Material: tungsten Carbide

Others:

Cutting Structure

The durability of premium tungsten carbide insert is improved with new formulas and new 

techniques and new techniques. The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces.

Bearing Structure

Non-sealed roller bearing. Drilling fluid can enter the bearing directly for cooling; Balls lock the cone 

which reduces the probability of cone ropping to minimum.

Product Application

It is suitable for the shallow well, water well and geothermal well.

Packing: each bit with one fumigation free of wooden case

Shipping: by sea or by air

The place of departure: Tianjin seaport or Beijing airport.

Payment terms: T/T (30% downpayment and 70%balance before shipping.)

                            L/C    D/A    D/P   Westem Union   MoneyGram   and so on

Delivery time:  according to the specific QTY ( fewer than 100, delivery within 10 days )

The warranty period: 2-4 years

 After sale service :  free

Our advantage: most favourable price and best qualtity

Company name: Hejian Zhongcheng Drill Bit Manufacture Co.,Ltd

Address: No.6,Economic development zone, Hejian city, Hebei province, China

The address of branch company: No.8413, Juxing Road 9, Haihe Industrial Zone, Tianjin City

Date of establishment: 1988

Our own brand: SRF

Our main certificate: API/ISO/I9001/SGS and so on