| Customization: | Available |
|---|---|
| Type: | Core Drill |
| Usage: | Well Drilling |
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Size | 12 1/4" |
IADC Code | 437 |
Thread | 8 5/8REG |
G.W./N.W. | 102/96(KG) |
Dimension | 345*345*185(mm) |
Standards | SY/T5164 |
API SPEC 7-1 | |
Teeth Type | Standard Type |
Back cone feature | single Row |
Sealed Protection | Enhanced Type |
WOB | 0.70~1.20KN/mm |
Rotation Speed | 70-40r/min |
Applicable Formations | High compressive strength, medium hard, thick hard interlayer, such as hard shale, limestone, sandstone, dolomite, etc. |
IADC WOB (KN/mm) | RPM (r/min) | Applicable | Formations |
417/437/447/415/435 | 0.35~0.9 | 150~70 | 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 | 140~60 | Soft formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc. |
537/547/535 | 0.45~1.0 | 120~50 | 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 | 90~50 | Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc |
637/635 | 0.5~1.2 | 80~40 | Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc. |
Note: The upper limits ofWOB and RPM in above table should not be used simultaneously. | |||
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