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Drill Collar

Posted at: Offers to Sell and Export | Posted on: Tue 16 Jul, 2013 7:38 am | Product Category: Drill collars [53]
drill collar
Products Photos CatalogDrill Collar Photos Catalog

Drill collars is one of the most important product of Weigao oil drillings which mainly used to provide

bit weight to drill so that drill pipe is in tension. Especially drill collar can keep drill bit centralized and hole track by large rigidity. Weigao brand drill collars are manufactured strictly from API Spec7-1 standard. Weigao own the leading heat treatment equipment which import for worldwide.

It is mainly used between the drill head and the drill pipe, so that it can make the drill head work reposefully and keep right trace by providing the pressure and weight for drill head.The product quality and stability, the customers satisfaction is 100%.

WEIGAO offers a wide variety of drill collar sizes from 3 ⅛” - 9 ½”, 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.


1) good quality and competive price

2) certified by API & ISO9001:2008

3) 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.



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



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


standard AISI4145H and API Spec.7

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

Company Contact:

No member photo
Contact Name: Caifeng Wang
Company Name: Shanxi Weigao Petroleum Drilling Tools Co., Ltd
Email: Email
Tel: 86-0351-2598640
Fax: 86-0351-2598640
Street Address: No.3, South
Industrial Zone Of Nanshahe,
Songzhuang Shuiyu
Taiyuan, Shanxi 030045
Website: http://www.www.sxweigao.com.com
Member name: sxweigao
Country: China-CN China
Member Since: 16 July 2013
Total Leads: 7 sxweigao Import Export Business Leads
Business focus: Drill Collar, Drill Pipe, Square Kelly, Hexagonal Kelly, Non Magnetic Collar
Verify: Safe Import Export Tips
Product Category: Drill collars [53]

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