drill coller - API
drill coller For Sale, Most Competitive Price, Fast Delivery, Custom Service, Wholesale drill coller, Made in China, High Quality Products!, China drill coller, drill pipe Supplier, Manufacturer.Specifications
1、Low carbon steel,stainless steel2、First-class reputation from regular customer3、strict API-7-1 standard4、Delivery ontime
5、API Spec.
Quick Details
Place of Origin: China (Mainland) Brand Name: Noryke Condition: New
Type: Drill Collar,Petroleum drill tools Machine Type: Drilling Tool Certification: API
Material: Carbon Steel Processing Type: Forging Use: Well Drilling
Packaging & Delivery
Packaging Detail: Wooden case
Delivery Detail: Depend on 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 impact 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
Noryke Petroleum Machinery Equipment Co.,Ltd.
Address: baoshan Road No.171 shayibake Urumqi, Urumqi, xinjiang, China,
Tel: 0991-4555541
Noryke Petroleum Machinery Equipment Co.,Ltd. Located in Urumqi, China. Since 1998, we supplied new, renew, used (rebuilt) tricone bit, steel tooth bit, TCI tricone bit, rock roller bit, three cone bits, tri-cone bit, milled tooth bit, steel tooth rock bit, PDC bit, diamond core bit ,single cone bit ,reamer bit,hole opener ,drill pipe ,drill rod ,drilling machine,downhole motor,button bits.