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Factory Price 22 Inch IADC 517 Api Tci Tricone Drill Bit Oil Well Direction Rock Drilling

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Product Description
Basical Specification
Size of tricone bit
22 inch 558.8mm 
Connection
7 5/8" Reg pin
IADC code 
517 537
Bearing 
Journal /roller 
Sealed 
rubber or metal sealed 
Operating Parameters
WOB (Weight On Bit)
0.35~1.05 KN/mm (bit Dia.)
Rotary speed
110~40 r/min
Make up torque
8.5~12.2 KN.M
Formation
Medium formation with high compressive strength ,and high drillability ,such as mudstone, gypsum,salt,soft limestone,etc.
Optimal test method for drilling parameters


1. Drill for 5 minutes with initially selected proper WOB and moderate RPM (60~100r/min) and record the ROP (as shown in the table below).
2. Moderately inctease WOB and keep the same RPM and drill under this WOB for 5 minutes and again record the RPO (as shown in the table below).
3. Decrease WOB b the same extent and tepeat step 2.
4. Find the WOB in the tow groups of test than can yield highest ROP.
5. Properly change RPM under optimal WOB and record the ROP (as shown in the table below).
6. Select the RPM at the highest ROP.
7. Set the drilling parameter at the best combination:60KN RPM: 120r/min
Times
RPM:100r/min
WOB:60KN
WOB (KN)
Drilling hour (min/m)
RPM (r/min)
Drilling hour (min/m
1
80
8
100
7
2
100
9
120
5.5
3
60
7
80
8
Select
60
7
120
5.5
PDC牙轮钻头
IADC code
WOB
(KN/mm)
RPM
(r/min)
Applicable Formations
437/447/435
0.35~0.9
240~70
Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk,gypsum,salt,soft limestone,
etc.
517/527/515
0.35~1.0
220~60
Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft limestone, etc.
537/547/535
0.45~1.0
220~50
Soft to medium formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone,
medium formation with harder and abrasive interbeds, etc.
617/615
0.45~1.1
200~50
Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc

637/635
0.5~1.1
180~40
Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc.


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