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Rock bit 8 3/4 tci IADC 517 new rubber seal tricone bit for well drilling

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Quick Details

Condition: New
Place of Origin: Hebei China
Processing Type: forging
Local Service Location: none
Warranty: unavailable
Machine Type: Drilling Tool
Seal Type: Rubber Seal
Use: Well Drilling
Size: 8 3/4'' (222.25mm)
Color: Gold
Bearing Type: Sliding Bearing
Whether to Protect Diameter: Yes
Material: Carbon Steel
Showroom Location: none
Certification: API
RPM: 120 or less
Brand Name: HAOQI
Video outgoing-inspection: Provided
Marketing Type: Ordinary Product
Applicable Industries: Construction works ,Energy & Mining,well drilling
Formation: Medium Hard Formation
Machinery Test Report: Provided
Thread Connection: 4 1/2 API REG
Packaging Detail: Wooden box/Personal customization
Selling Units: Single item
Single package size: 41X25X25 cm
Single gross weight: 42.0 KG
Package Preview:,
Hebei Haoqi Drilling Equipment Co., Ltd.
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Detail Show




IADC CODE Rock Formation WOB RPM
417 Low compressive strength, high drill-ability and extremely soft formation,like shale,clay ,sandstone,conglomerate etc. 0.35-0.90 140-70
437 Low compressive strength, high drill-ability and soft formation,like shale,clay,sandstone,soft limestone, salt rock,etc.  0.35-1.00 140-60
517 Low compressive strength, high drill-ability and soft formation ,like shale, clay,sandstone,soft limestone,salt rock,etc. 0.35-1.05 120-50
537 Low compressive strength,medium hard formation with hard abrasive interlayer,like Hard shale , anhydrite, soft limestone, sandstone,dolomite with messanine,etc. 0.50.-1.05 110-40
617 High compressive strength,medium hard and thick hard interlayerlike hard shale,limestone,sandstone,dolomite, etc. 0.50.-1.05 80-40
637 High compressive strength,medium hard and high abrasive formation,like limestone,dolomite,sandstone,chert,etc. 0.70-1.20 70-40


Production Process



Precautions for using tricone bit

1. Preparation before entering the well
1.1 Make sure there are no falling objects at the bottom of the well.
1.2 Check that the appearance of the drill is not damaged.
1.3 Prohibited to contact with hard materials such as steel directly.
1.4 Select nozzle and size according to actual needs.
2. Tripping in
1.1 Drill down slowly before approaching the bottom of the well, the mud pump displacement is maximized, the rotation speed is controlled at 30-60rpm, and cycle for 5-10 minutes before approaching the bottom of the well.
1.2 After the drill bit touches the bottom of the well, it is necessary to maintain low WOB, low rotation speed, large displacement, low torque, and the rotation speed cannot exceed 60rpm.
1.3 After drilling for 20 minutes, gradually increase the WOB and rotation speed to a reasonable value.
3. Make connection
1.1 The drill bit can only be lifted off the bottom of the well after natural release of WOB, it cannot be lifted directly.
1.2 After making connection, follow the precautions for the tripping in.
4.Drilling in
1.1 Pay close attention to the changes in the values of SPP and WOB.
1.2 When skipping and rough drilling occur in the drill bit, it is necessary to adjust the WOB and rotation speed in time.
1.3 If you find that the drill bit has no footage, the pump pressure is significantly increased / decreased, the mechanical speed is suddenly reduced, and the torque is increased, etc., immediately POOH.


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