Diamond Anti Abrasive Layer Tricone Drill Bit , Elastomer Sealed TCI Hard Rock Drill Bits

Reverse Circulation (RC) Drilling Bits 115-165mm with RC drilling hammer

Introduction

Structure of Tricone bits

Steel Tooth Tricone Bit and TCI tricone bits 

1- Bearing Structure

Bit bearing has three kinds: rolling bearing, sliding bearing, sliding bearing circlip. The circlip sliding bearing is mainly for foreign manufacturers of products bearing the TCI tricone bit, at most only rolling bearing and sliding bearing.

2- Cutting Structure, Cone and Tooth

The cone is a cone, divided into single cone and cone two. Single cone consists of main cone and the back component, single cone in the bottom of the well for pure rolling movement, suitable for drilling hard formation; complex cone consists of main cone, side cone and the back cone is composed of three parts, the cone at the bottom of the well work besides the rolling, also produce sliding, suitable for soft stratum drilling.

Hard alloy gear has 10 a variety of, such as spherical, conical, wedge shaped, spoon, spoon shaped, cone top spoon shaped, flat shape, the conical wedge shape, different lithology formation, the rock breaking mechanism of bit teeth shape is different, different. A type of drill often is not a tooth.

The shape of the steel tooth is wedge shaped, in order to strengthen the drill gage, outer row of teeth are often designed into "T", "L", "II"; in order to overcome the drill bit is easy to wear in the broken strata shortcomings, need welding wear-resistant material on the tooth face and the back cone.

Tooth shape, size, number, length depends on the hardness of formation, formation is soft, is large, sharp teeth, less; on the contrary, the more hard tooth formation, smaller, shorter, the more the number of.

3- Oil Pressure Compensation System

The device consists of a bearing ring, oil sac, protection cup, gland, plug, when the ring parts. Its role is to the bearing chamber pressure difference between inside and outside the balance of TCI Tricone bit, so that the bearing sealing ring in the small pressure difference work for long time, prevent the drilling fluid into the bearing cavity and avoid the leakage of lubricating grease, and store enough grease to the bearing cavity continuously added, the bit in good sealing state and lubrication condition.

4- Bit Nozzle

In order to solve the problems timely rushed from the bottom of the well cuttings, to maintain the bottom clean, even with a high speed jet to crush the rock and purpose, people design and installation of the nozzle.

The nozzle is made of hard alloy processing, commonly used nozzle has three main models, the standard type, cover type, and the micro long nozzle, the other is pulsed nozzle, oblique nozzle, extended nozzle etc..

Application of tricone bits

TCI bits series:

1. Soft formation TCI t