| Product name | oil 9 7/8" HF 4000 API 7-1 oilfield drilling tools Integral Spiral drilling Centralizers near bit stabilizer |
| Type | HF 4000 Centralizers |
| rotary speed | 200~80 |
| Processing types | forging rubber sealed journal bearing |
| Pin | 6 5/8" Reg |
| Model Number | stabilizer |
| usage | HDD |
| Application formation | soft hard formation |
| Weight | 260 kg |
| Industrial standard | SY/T5164 |
| MOQ | 1 |
| Table of classification of formation hardness and bit selection | |||||
| Roller cone bit IADC code | IADC code of diamond bit | Formation description | Rock type | Compressive strength(Mpa) | ROP(m/h) |
| 111/124 | M/S112~M/S223 | Very soft:sticky soft formation with low compressive strength. | Clay Siltstone sandstone | <25 | >20 |
| 116/137 | M/S222~M/S323 | Soft:soft formation with low compressive strength and high drillability. | Clay rock Marl Lignite sandstone | 25~50 | 10~20 |
| 417/527 | M/S323~M/S433 | Medium soft:soft to medium formation with low compressive strength and steak. | Clay rock Marl Lignite Sandstone Siltstone Anhydrite Tuff | 50~75 | 5~15 |
| 517/537 | M322~M443 | Medium:medium to hard formation with high compressive strength and thin abrasive streak. | Mudstone Dark rock shale | 75~100 | 2~6 |
| 537/617 | M422~M444 | Medium hard:hard and dense formation with high compressive strength and medium abrasiveness. | Dark rock Hard shale Anhydrite Sandstone Dolomite | 100~200 | 1.5~3 |
| IADC CODE SELECTION | |||
| IADC | WOB | RPM | Application |
| (KN/mm) | (r/min) | ||
| 111/114/115 | 0.3-0.75 | 200-80 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk |
| 116/117 | 0.35-0.8 | 150-80 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk |
| 121 | 0.3-0.85 | 200-80 | soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone |
| 124/125 | 180-60 | ||
| 131 | 0.3-0.95 | 180-80 | soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds |
| 136/137 | 0.35-1.0 | 120-60 | |
| 211/241 | 0.3-0.95 | 180-80 | medium formations with high compressive strength, like medium, soft shake, hard gypsum, medium soft limestone, medium soft sandstone, soft formation with harder interbeds. |
| 216/217 | 0.4-1.0 | 100-60 | |
| 246/247 | 0.4-1.0 | 80-50 | medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite |
| 321 | 0.4-1.0 | 150-70 | medium abrasive formations, like abrasive shale, limestone, sandstone, dolomite, hard gypsum, marble |
| 324 | 0.4-1.0 | 120-50 | |
| 437/447/435 | 0.35-0.9 | 240-70 | very soft formations with low compressive strength and high drill ability, like clay, mudstone, chalk, gypsum, salt, soft limestone |
| 517/527/515 | 0.35-1.0 | 220-60 | soft formations with low compressive strength and high drill ability, like mudstone, gypsum, salt, soft limestone |
| 537/547/535 | 0.45-1.0 | 220-50 | soft to medium formations with low compressive strength, like medium, soft shake, medium soft limestone, medium soft sandstone, medium formation with harder and abrasive interbeds |
| 617/615 | 0.45-1.1 | 200-50 | medium hard formation with high compressive strength, like hard shale, limestone, sandstone, dolomite |
| 637/635 | 0.5-1.1 | 180-40 | hard formation with high compressive strength, like limestone, sandstone, dolomite, hard gypsum, marble |
| Note: Above limits of WOB and RRPM should not be used simultaneously |
The products of
Main products
tricone bit(mill tooth and tungsten carbide insert tricone bit)
PDC bit(matrix body and steel body PDC bit)
hole opener(HDD rock reamer,barrel reamer,fluted reamer,etc)
drag bit(step drag bit,PDC drag bit,chevron drag bit,etc)
accessories(roller cone,bit breaker,ring gauge,nozzle,etc)




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Step 1
Payment and order readiness
Minimum order: 1 Units
Payment terms, specifications, and order details are confirmed before preparation begins.
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Step 2
Preparation
2 days
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Step 3
Packaging and dispatch
Economy · Approx. shipping fee: $ 499.90 for 1 piece · Estimated delivery: Oct 16–Dec 1 (38–84 days)
Final packing, freight, and delivery dates are confirmed before dispatch.
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