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| Product Name: |
drill coller
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| Supply Ability: |
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| Related proudcts |
rock bit, drill pipe, drill coller, |
| Specifications |
API |
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Specifications
1.Low carbon steel,stainless steel
2.First-class reputation from regular customer
3.strict API-7-1 standard
4、Delivery ontime
5、API Spec.
Quick ***ails
Place of Origin: China Brand Name: Kingdream , CS , Noryke New: Brand New
Type : Drill Coller Machine Type: Drilling Tool Certification : API
Material: Carbon Steel Process Type: Forging Use: Oil well&gas well,water well...
Size: 2 3/8?5?Thickness 7.11-12.7mm Technique: Hot Rolled
Packing: bundles or as your requirements Delivery : Depend on the contract
Specifacation:
The drill collars are made of modified AISI 4145H chromium molybdenum alloy steel. These drill collar bars are full-length heat treated and water quenched to obtain ASTM A-370 mechanical properties. Full mechanical and chemical mill test certifications are supplied with all drill collars. These mill test certifications guarantee a hardness range of 285 to 341 BHN and an i***ct value of 40 ft.-lbs. at room temperature one inch below the surface.To ensure close tolerance bores, all drill collar bars are trepanned then drifted to API specifications. Bar surface finish is “as rolled?which is original mill finish.
CONNECTIONS:
All connections are precision-machined to API specifications. API relief groove pin and bore back box stress relief are available on request. Thread roots are cold-worked to offer a greater resistance to fatigue. All connections are phosphated to minimize galling during makeup and applied with thread storage compound. Thread protectors are installed to ensure adequate joint protection during shipment.
SPIRAL DRILL COLLARS:
The spiral cut is added to a drill collar to prevent the likelihood of differential wall-sticking by reducing wall contact between the drill collar and the wall of the hole. The box end of the spiral collar is left uncut from 79 inches from box
shoulder and the pin end is left uncut 30 inches from the pin shoulder |
| Company: |
Noryke Petroleum Machinery Equipment Co.,Ltd
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| Contact: |
Ms. s shmily |
| Address: |
baoshan Road No.171 shayibake Urumqi |
| Postcode: |
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| Tel: |
0991-4555541 |
| Fax: |
0991-4555541 |
| E-mail: |
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