GT637
The multiple heel position with gauge trimmer on the heel, tungsten carbide and hardfacing on the shirttail, strengthened spear point will enhance the gauge protection.
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Bit specification
features
Option Features
Bit specification
GREAT has customized manufacture 90 ° U-shaped Roller Bit, 120 ° U-shaped Roller Bit and Starry Sky Roller Bit.
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The Roller bit mainly used for Rock reamer (Hole opener) For HDD (Horizontal directional drilling ) Trenchless technology.
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The application of engineering plate holder makes the construction more convenient and quick. The Roller bit specialized in used for Rock reamer and Core barrel.
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The roller bit has metal sealed bearing and rubber sealed bearing.
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Full cutter layout (Starry Sky Roller Bit), fast assembly way of bit leg avoid the heating problem of soldering, which extends the lifetime of bearing. Replaceable Cutter rock reamer is designed for a big rig and big hole drilling, fit for all sorts of rock formation.
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High precision bearing surface heat treatment adopts advanced heat treatment technology to improve the bearing capacity and service life.
features
Series type of cone bits are assembly parts of Tricone bit and hole opener,its the main cutting structure of a bit.
Cutting Structure
Reinforcing the comprehensive mechanical properties of cutting tooth by using high quality tungsten carbide inserts of new formula and new techniques of insert bit.
Gauge Structure
The multiple heel position with gauge trimmer on the heel, tungsten carbide and hardfacing on the shirttail, strengthened spear point will enhance the gauge protection.
Bearing Structure
High precision journal bearing with two thrust faces. Ball locked cone. Hardfaced head bearing surface. Cone bearing inlaid with friction reducing alloy and then silver-plated. Abrasion resistance and seizure resistance of the bearing are improved, and suitable for high rotary speed.
Option Features
Seal and Lubrication
The advanced metal seal package is composed by two metal seals and two elastic rubber energineers. The energizer and back-up ring will support the pushing force to make the two metal faces tightly contact. In the drilling, the metal seals are relevant moving, and the energizers are static. This will increase the bearing seal reliability and durability. The compensation system and the high quality bit grease can limit pressure differential, and greatly increase the lubricating reliability.
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