| Model: | roller bit |
|---|---|
| Brand: | DRILLSTAR |
| Origin: | Made In China |
| Category: | Industrial Supplies / Mining Machine |
| Label: | roller bit , teeth , tooth |
| Price: |
US $5
/ pc
|
| Min. Order: | 50 pc |
| Last Online:26 Mar, 2015 |
Roller bits are mainly divided into two types:
i) Metal sealed roller bits
ii) Rubber sealed roller bits
Metal sealed roller bits main applications:
a) Adopted high-speed bearing metal sealed technology, long available time under the screw drilling condition.
b) High efficiency cutting edge and structure to improve drilling speed.
c) Cutter shell self-protection shape to reduce abrasion of detritus and unbreakable rock.
d) Best choice for directional well, horizontal drainhole and horizontal branch wells.
|
Size (inch) |
Connection (API REG) |
|
5 7/8”,6”,6 1/2”,6 3/4” |
3 1/2” |
|
7 7/8”,8 1/2”,8 3/4” |
4 1/2” |
|
9 1/2”,9 5/8”,9 7/8”,12 1/4”,12 1/2”,13 1/8”,13 5/8” |
6 5/8” |
|
16”,17 1/2” |
7 5/8” |
Rubber sealed roller bits main applications:
a) Adopted new alloy welding technology to improve abrasion and available time.
b) Multiple gauge structure, weld trimming teeth on the edge to enhance gauge protection ability.
c) High precision with radial sliding, two thrust rubber sealed bearing and optimized anti-seizure ability to avoid bits peel off.
|
Size (inch) |
Connection (API REG) |
|
5 1/2”,5 7/8”,6”,6 1/2”,6 3/4” |
3 1/2” |
|
7 1/2”,7 7/8”,8 1/2”,8 3/4” |
4 1/2” |
|
9 1/2”,9 5/8”,9 7/8”,12 1/4”,12 1/2”,13 1/8”,13 5/8” |
6 5/8” |
|
14 3/4”,15”,15 1/2”,16”,17 1/2”,20”,26” |
7 5/8” |
|
IADC Code |
Formation condition |
Recommend |
|
|
Pressure/diameter kn/mm |
Speed r/mm |
||
|
115, 117 |
Low compressive strength and high drillability of soft stratum, such as soft shale, clay, gypsum, etc |
0.35-0.90 |
150-80 |
|
124, 126, 127 |
Low compressive strength and high drillability of soft stratum, such as, soft shale, clay, gypsum, soft limestone, etc |
0.35-1.00 |
150-70 |
|
136, 137 |
Low compressive strength of the soft to medium formation, or there is a hard interlayer in soft rock, such as anhydrite, soft limestone, sandstone, etc |
0.35-1.05 |
120-60 |
|
217, 227 |
High compressive strength, hard, thick interlayer, such as hard shale, limestone, sandstone, dolomite, etc |
0.50-1.20 |
100-50 |
|
437, 447 |
Low compressive strength and high drillability of soft stratum, such as soft shale, clay, gypsum, etc |
0.35-0.90 |
140-60 |
|
515, 517, 527 |
Low compressive strength and high drillability of soft stratum, such as shale, clay, sandstone, limestone, etc |
0.35-1.05 |
120-50 |
|
537, 547 |
Low compressive strength, medium-soft, hard abrasive interbedded, such as hard shale, anhydrite, soft limestone, sandstone, ham sandwich dolomite |
0.35-1.05 |
110-40 |
|
617, 627, 637 |
High compressive strength, medium-hard and abrasive high formation, such as limestone, dolomite, sandstone, chert, etc |
0.70-1.20 |
150-40 |
|
737 |
Hard strata with high abrasive, such as limestone, dolomite, flint, hard sandstone, etc |
0.70-1.30 |
70-40 |
DRILLSTAR also manufactures different designs of bits for all brands/models of excavators. Moreover, it can also manufacture bits or drilling tools for different applications of any new design as per requirement of the customer.
