|Place of Origin:||Hebei China|
|Local Service Location:||none|
|Machine Type:||Drilling Tool|
|Seal Type:||Rubber Seal|
|Size:||8 3/4'' (222.25mm)|
|Bearing Type:||Sliding Bearing|
|Whether to Protect Diameter:||Yes|
|RPM:||120 or less|
|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|
|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|
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.
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.