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Help Center4 1/8''---9''drill Collar for Oilwell API
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Product Description
Drill Collar Parameters
| Nominal size |
OD | ID | L | Bevel Diameter mm |
Bending Strength Ratio |
||
| mm | in | mm | in | ||||
| NC31-41(2 7/8)IF | 104.8 | 4 1/8 | 50.8 | 2 | 9150 | 100.4 | 2.43:1 |
| NC35-47 | 120.7 | 4 3/4 | 50.8 | 2 | 9150 | 114.7 | 2.58:1 |
| NC38-50(3 1/2)FH | 127 | 5 | 57.2 | 2 1/4 | 9150 | 121 | 2.38:1 |
| NC44-60 | 152.4 | 6 | 57.2 | 2 1/4 | 9150 | 144.5 | 2.49:1 |
| NC44-60 | 152.4 | 6 | 71.4 | 2 13/16 | 9150/9450 | 144.5 | 2.84:1 |
| NC44-62 | 158.8 | 6 1/4 | 57.2 | 2 1/4 | 9150/9450 | 149.2 | 2.91:1 |
| NC46-62(4IF) | 158.8 | 6 1/4 | 71.4 | 2 13/16 | 9150/9450 | 150 | 2.63:1 |
| NC46-65(4IF) | 165.1 | 6 1/2 | 57.2 | 2 1/4 | 9150/9450 | 154.8 | 2.76:1 |
| NC46-65(4IF) | 165.1 | 6 1/2 | 71.4 | 2 13/16 | 9150/9450 | 154.8 | 3.05:1 |
| NC46-67(4IF) | 171.4 | 6 3/4 | 57.2 | 2 1/4 | 9150/9450 | 159.5 | 3.18:1 |
| NC50-67(4 1/2IF) | 171.4 | 6 3/4 | 71.4 | 2 13/16 | 9150/9450 | 159.5 | 2.37:1 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 57.2 | 2 1/4 | 9150/9450 | 164.7 | 2.54:1 |
| NC50-70(4 1/2IF) | 177.8 | 7 | 71.4 | 2 13/16 | 9150/9450 | 164.7 | 2.73:1 |
| NC50-72(4 1/2IF) | 184.2 | 7 1/4 | 71.4 | 2 13/16 | 9150/9450 | 169.5 | 3.12:1 |
| NC56-77 | 196.8 | 7 3/4 | 71.4 | 2 13/16 | 9150/9450 | 185.3 | 2.70:1 |
| NC56-80 | 203.2 | 8 | 71.4 | 2 13/16 | 9150/9450 | 190.1 | 3.02:1 |
| 6 5/8 REG | 209.6 | 8 1/4 | 71.4 | 2 13/16 | 9150/9450 | 195.7 | 2.93 |
| NC61-90 | 228.6 | 9 | 71.4 | 2 13/16 | 9150/9450 | 121.7 | 3.17:1 |
Drill Collar Flow Chart
Drill Collar Introduction
Drill collars are made with material AISI 4145H in accordance with API Spec 7-1. We supply slick drill collars and spiral drill collars; their sizes are from 3-1/8 to 11 inches.
Standard:API SPEC 7-1, API SPEC 7-2
Usage:
It is one of the most important elements of drill stem. It can provide drilling pressure to the bit and improve drill stem rigid.
Effectively control the trace element of the material which was selected with high quality and unique method. Adopt special intermediate frequency heat treatment method and advanced ultrasonic and magnetic particle inspection method and holding higher mechanical property. According to the shape and material drill collar was divided into three forms:
1.Type A(Cylindrical): To be made of ordinary alloy steel, with circular cross section inside and outside the drill collar.
2.Type B(Spiral): To be made of ordinary alloy steel, with spiral grooves on the outer surface of drill collar.
3.Type C(Nonmagnetic): To be made of low magnetic permeability alloy steel, with circular cross section inside and outside the drill collar.
Company Information
Shandong Mingzhu Petroleum Equipment Co., Ltd. is s professional petroleum equipment manufacture enterprise, which integrates R&D with production, sales and service. We are mainly engaging in production and sales of oil, gas and non-excavation drill string etc.; our products mainly include drill pipe, tubing, casing, drill collar, heavy weight drill pipe and other part. We strictly in accordance with the requirement of API Q1quality management system, and strictly control the products quality.
Our company will continue to enhance R&D production capacity with the growing good reputation in the petroleum equipment market. We shall satisfy you all over the world with quality, credit and satisfactory service by the first-class management, first-class talent, first-class equipment, first-class process and first-class quality.
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