Low-Cost And Fast Driling Bit 4 1/2" API Steel Body S223 PDC Drill Bit
Product Description
PDC bits are designed for high speed drilling in shale, limestone, and sandstone formations.
Unlike roller cones, these polycrystalline diamond compact (PDC) drill bits are one piece bodies with no moving parts. The fixed-cutters shave away the rock, making it possible to operate with higher rotation speeds more efficiently in consolidated formations.
STEEL BODY PDC BITS
Steel is the opposite of matrix. It can of withstanding high impact loads, but is softer and lacks protective features. The strength and ductility of steel give steel-bit bodies high impact resistance. Steel bodies are considerably stronger than matrix bodies.
A beneficial feature of steel bits is that they can easily be rebuilt a number of times because worn or damaged cutters can be replaced rather easily. This is a particular advantage for operators in low-cost drilling environments.
As a general rule, large cutters (19mm to 25mm) are more aggressive than small cutters. However, they may increase torque fluctuations.
Smaller cutters (8mm, 10mm, 13mm and 16mm) have been shown to drill at higher ROP than large cutters in certain applications. One such application is limestone for example.
Additionally, small cutters produce smaller cuttings while large cutters produce larger cuttings. Large cuttings may cause problems with hole cleaning if the drilling fluid cannot carry the cuttings up.
(1) or (2) Soft and soft sticky-Highly drillable formations such as clay, marl, gumbo and unconsolidated sands.
(3) Soft-medium-Low compressive strength sands, shale and anhydrites with hard layers intermixed.
(4) Medium-Moderate compressive strength sand, chalk, anhydrite and shale.
(6) Medium hard-Higher compressive strength with non-or semi-sharp sand, shale, lime and anhydrite.
(7) Hard-High compressive strength with sharp layers of sand or siltstone.
(8) Extremely hard-Dense and sharp formations such as quartzite and volcanic rock.
| The specification of Steel body PDC bit (S223) |
| 1.Bit characteristics: PDC cutters of different features are selected and bit profile design is optomized to suit different drilling applications in different formations to satisfy different requirements when drilling soft medium hard formations. 2.Bit performance:Deep and wide junk slots ensure bit cleaning and cooling of drilling fluid,which benefits fast driling and anti-balling |
| Size(in) | Primary cutter size | Gage length(mm) | Nozzle | Make up Torque (K.N.m) | Number of blades | API Shank(in) |
| 8 1/2 | 19mm | 4" | 6NZ+1P | 24.1~26.5 | 5 | 4 1/2" API REG |
| 12 1/4 | 19mm | 3" | 6NZ+1P | 51.7~56.9 | 5 | 6 5/8" API REG |
| 13 5/8 | 19mm | 2.7" | 7NZ | 51.7~56.9 | 5 | 6 5/8" API REG |
| 14 3/4 | 19mm | 2.9" | 7NZ | 82.5~90.8 | 5 | 7 5/8" API REG |
| 16 | 19mm | 3" | 7NZ | 82.5~90.8 | 5 | 7 5/8" API REG |
| 17 1/2 | 19mm | 3" | 7NZ | 82.5~90.8 | 5 | 7 5/8" API REG |
