1.Soft formation TCI triconebits:
The soft formation TCI tricone bits are used to drill low compressive strength,very soft formations. This bit maximized to use of both conical and chiseltungsten carbide inserts of large diameters and high projection. This cuttingstructure design, combined with maximum cone offset, results in high bitpenetration rates. The deep intermesh of cutter rows prevents bit bailing insticky formations.
2.Mediumformation TCI tricone bits:
The medium formation TCI tricone bits featuresaggressive chisel tungsten carbide inserts on the heel rows and inner rows. Thisdesign provides a fast drilling rate and added cutting structure durability inmedium to medium hard for mations. The HSN rubber O-ring provides adequatesealing for bearing durability.
3.Hardformation TCI tricone bits:
The hard formation TCI tricone bits can be used todrill hard and abrasive formations. Wear resistance tungsten carbide inserts areused in the outer rows to prevent loss of bit gauge. Maximum numbers ofhemispherical shaped inserts are used in all rows to provide cutter durabilityand long life.
4.Mediumhard formation TCI tricone bits:
Themedium hard formation TCI tricone bits features robust chisel tungsten carbideinserts on the heel row and conical on the inner rows. This design provides afast drilling rate and added cutting structure durability in medium to mediumhard formations. The HSN rubber O-ring provides adequate sealing for bearing durability
Recommended Drilling Parameter
IADC | WOB (KN/mm) | RPM (r/min) | Applicable Formations | |
111 | 0.3~0.75 | 200~80 | Very soft formations with low compressive strength and high drillability, such as clay, mudstone, chalk, etc. | |
121 | 0.3~0.85 | 200~80 | Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. | |
131 | 0.3~0.95 | 180~80 | Soft to medium formations with low compressive strength and high drillability, such as medium soft shale, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. | |
211 | 0.35~0.95 | 180~80 | Medium formations with high compress strength, such as medium soft shale, hard gypsum , medium soft limestone, medium soft sandstone, soft formation with harder interbed, etc. | |
241 | 0.35~0.95 | 180~70 | Medium hard formations with high compressive strength, such as abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble,etc | |
321 | 0.4~1.0 | 150~70 | Hard semi-abrasive formations, such as abrasive shale,limestone,sand stone,dolomite,hard gypsum, marble,etc. | |
Note: The upper limits of WOB and RPM in above table should not be used simultaneously | ||||
