Import Drill Collar — Buy in Bulk from Supplier in China

WEIGAO offers a wide variety of drill collar sizes from 3 ¨û¡± - 9 ¨ö¡±, spiraled or slick, and with API connections. All our drill collars are tailored to your specific requirements. We supply slick, spiral, and non-magnetic drill collars; their sizes are from 3-1/8 to 11 inches. WEIGAO Drill Collar are high quality products which meet the hardest operating conditions. Each collar undergoes strict quality control, more than one hundred checks are made in the course of manufacturing. All mechanical properties meet or exceed the requirements of API Spec.7-1 for Drill Collars. WEIGAO Drill collars are made of AISI 4145 H modified alloy steel or non-magnetic material. Other grades are available on request. WEIGAO drill collars are used successfully for sour gas wells. After forging or rolling, the bars are peeled, heat treated, stress relieved, ultrasonically inspected and straightened to API specifications, to ensure that each bar will meet the physical properties. Advantage: 1) good quality and competive price2) certified by API & ISO9001:20083) use for well drilling 4) delivery on time 5) Size according to your request 6) drill collar,stick drill collar,non-magnetic drill collar,spiral drill collar covering all size. Description: A. Slick Drill Collar Note: Drill collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. The Drill collar are manufactured strictly from API Spec7-1 B. Spiral Drill Collar Note: Spiral drill collar is used to reduce contact area with hole so as to avoid efficiently bit sticking from diffirential pressure. The drill collars are manufactired strictly according to API Spec7-1 C. Spiral Drill Collar With Elevator Groove And Slip Groove Note: Elevator groove and slip groove made on box thread face of slick drill collar or spiral drill collar can be used as lifting sub and safety slip when trip out. The technical parameters for elevator groove and slip groove is as per API SPEC7-1. Hardbanding is optional at customers' requests. D.Non-magnetic Drill Collar The as cold rolled finish on both ID and OD surface with unique technical process strengthen the structure and ensures the tools with optimal resistance to stress, corrosion, cracking and the mechanical performance is greatly enhanced Specification: 1>standard:AISI 4145H and API Spec.72>Code:NCXX,IIF,REG3>O.D:4 3/4 -11inch4>I.D:2-3 inch5>Lenghth:9150mm,9450mm Code NCXX-digital type,IF-inner flat type, REG-regular type O.D 43/4-11 inch I.D 2-3 inch Lenghth 9150mm, 9450mm