API 3-1/8"-11" Drilling Collar of Downhole Drilling Equipment

Model: KINGWELL api 7-1 3-1/8"-11" drill collar 007
Place of Origin: Shaanxi,China (Mainland)
Material: AISI 4145 H Modified Alloy Steel
Standard: API SPEC 7-1
Applicantion: offshore well drilling
Model: 3-1/8"-11"
Packing: bundling or loose
MOQ: 2 Sets
Export Percentage: 95%
Supply ability: 1000 sets per month
Brand Name: KW


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Product Description

Payment & Shipping Terms Supply Capacity
Unit Price:10.0 USDProduction Capacity:1000 set per month
Payment Terms:L/C, D/P, D/A, T/TDelivery Date:30 days after received...
Min. Order:1 Piece/Pieces
Means of Transport:Ocean, Air, Land

API 3-1/8"-11" Drilling Collar of Downhole Drilling Equipment

1.Standard: API Spec 7-1

2.Material: AISI 4145 H Modified Alloy Steel

3.Export Percentage: 95%

4.Supply Ability: 1000 sets per month
5. Main Market: Middle East, North America, Europe
6. Delivery time: 10 days in stock, 30 days after advance payment

API 3-1/8"-11" Drilling Collar Generally Introduction:

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. TIANHE branddrill collars are manufactured strictly from API Spec7-1 and SY5411 standard.   

Types of Drill Collar we offer:

1. Api spiral drill collar

2. Slick drill collar

3. Non-magnetic drill collar

Drilling Collar Detail Specification:

Technical specifications and parameters
Drill Collar NumberO.D.I.D.Length 
Bevel DiameterRef bend g Strength ratio
NC23-3179.43 1/831.81 1/2915076.22.57:1
NC26-35(2 3/8 IF)88.93 1/238.11 1/2915082.92.42:1
NC31-41(2 7/8 IF)104.84 1/850.829150100.42.43:1
NC35-47120.64 3/450.829150114.72.58:1
NC38-50(3 1/2 IF)127.0557.22 1/49150121.02.38:1
NC44-60152.4657.22 1/49150 & 9450144.52.49:1
NC44-60152.4671.42 13/169150 & 9450144.52.84:1
NC44-62158.86 1/457.22 1/49150 & 9450149.22.91:1
NC46-62(4IF)158.86 1/471.42 13/169150 & 9450150.02.63:1
NC46-65(4IF)165.16 1/257.22 1/49150 & 9450154.82.76:1
NC46-65(4IF)165.16 1/271.42 13/169150 & 9450154.83.05:1
NC46-67(4IF)171.46 3/457.22 1/49150 & 9450159.53.18:1
NC50-67(4 1/2 IF)171.46 3/471.42 13/169150 & 9450159.52.37:1
NC50-70(4 1/2 IF)177.8757.22 1/49150 & 9450164.72.54:1
NC50-70(4 1/2 IF)177.8771.42 13/169150 & 9450164.72.73:1
NC50-72(4 1/2 IF)184.27 1/471.42 13/169150 & 9450169.53.12:1
NC56-77196.87 3/471.42 13/169150 & 9450185.32.70:1
NC56-80203.2871.42 13/169150 & 9450190.13.02:1
6 5/8 REG209.68 1/471.42 13/169150 & 9450195.72.93:1
NC61-90228.6971.42 13/169150 & 9450212.63.17:1
7 5/8 REG241.39 1/276.239150 & 9450223.82.81:1
NC70-97247.69 3/476.239150 & 9450232.82.57:1
NC70-1002541076.239150 & 9450237.32.81:1
8 5/8 REG279.41176.239150 & 9450266.72.84:1

API 3-1/8"-11" Drilling Collar Detail:

Company Profile:

Xi'an Kingwell Oilfield Machinery Co.,Ltd is a highly reputable supplier for oilfield equipment and services to Oil & Gas industries and provide complete solutions.

With over 10 years developing, we were developed from the beginning drilling service to manufacture factory who produce OCTG, DST tools and Solid Control products.

KINGWELL have experienced team, stronger enough to meet any challenge, we do believe honest is the base of business and cooperation, our aim is to build solid relationship with any part of honest. kingwell can provide highly efficient services to its clients resulting in accurate and timely deliveries at the best prices.
It is a professional supplier for oilfield products according to the API standard. We exporting ALL KINDS OF OILFIELD MACHINERY AND TOOLS with super Quality and Competitive Price in CHINA.   


Design & Development

Kingwell has an ongoing relationship with Xi'an Petroleum University and built up long term cooperation with China Aerospace Group for more than 10 years. Design Department is familiar with CAD and Pro-E facilities and has on rolls qualified & experienced engineers. Now, they are engaged in development of new products as required in the market place. Kingwell' products are validated in-house in a Test Well, a Sub-surface Type Test Facility with simulated well conditions up to 15000 psi Differential pressure , 400°F and Max 450°F.


1. All of our goods give 1 year warranty.

2. Within guarantee period, we supply free after service. After guarantee period, we supply square parts in 20% discount.


1. Our working time: 8:00am~22:00pm (if urgent, please call our director: jerry, Mobile: +86-18729329559)

2. All the inquiries will be replied within 24hours, so please feel to send us your inquiry.

3. When our skype is off line, please feel free to leave a message, and tell us the products you need, our model number, and your E-mail address.


Wood case or steel carton

Product delivery

Payment:TT/LC:30% advance payment.70%before shipment

Warranty: Warranty period is 1 year after installation.

Origin: China

Category: Drill Pipe/HWDP/Drill Collar

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