9 7/8”(250.83mm) IADC:517 Insert tooth Tricone Dirll Bits oilfield drilling bit

Specification

Note :The upper limits of WOB and RPM in above table should not be used simultaneously.

                               Description of tricone bit
(1) Cutting Structure: The durability of premium tungsten carbide inserts is improved with new formulas and new techniques for insert bit.The wear-resistance of teeth is enhanced with premium tungsten carbide hardfacing on the tooth surfaces for steel tooth bit.
(2) Gauge Structure: Multiple gauge protection with gauge trimmers on heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hardfacing on the shirttail increases gauge holding capability and bearing life.
(3)Bearing Structure: High precision bearing with two thrust faces. Balls lock the cone.Hardface heard 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.

Instructions for the use of drill bits

1.Select the appropriate type of drill bit based on formation lithological information, hydraulic and drilling parameters.

2.According to the hydraulic parameters to choose the corresponding nozzle, nozzle hole size grade difference should not be too large, so as not to erode the flow channel.

3.Before the drill bit is lowered into the well, 1) check that the size and type of the drill bit match the well diameter, 2) check that the nozzle is fitted, and 3) check that the specifications of the drill bit connecting wireline mating pattern and the joint match.

4.The drill bit should be lowered in accordance with the prescribed operating procedures for lowering the well, and after the drill bit has made contact with the bottom of the well, please make sure to press gently and turn slowly (drilling pressure 5-15kN, speed 60r/min). After 30 minutes, the drilling pressure can be gradually increased to normal.

Cautions

1.The user is requested to select the drill with the appropriate operating parameters in accordance with the operating instructions.

2.Please check carefully the appearance of the drill bit and verify that the end face of the drill bit's fillet is the same as the factory number on the box and the certificate of conformity.

3.Drilling pressure and rotational speed should be within the recommended parameters and should not be used in conjunction with larger values of drilling pressure and rotational speed.

4.The bottom of the well must be clean, and all types of drill bits must not be slipped, slowly lowered, and pier drilling is strictly prohibited.

5.Always operate smoothly during the drilling process. If you find any abnormalities such as jump drilling, you should analyse and take effective measures in time.