Customized: | Customized |
---|---|
Surface Treatment: | Spray |
Type: | Spiral Drill Collar |
Standard: | API |
Usage: | Oil Mining |
Material: | Carbon Steel |
Customization: |
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1. Introduction
Drill collar is used in the drilling of oil wells for weighting drill bit, enabling it to drill through rock. It is a bar made of solid steel, either plain carbon steel or non-magnetic steel alloy, drilled lengthwise to permit the passage of drilling fluids. Drill collar is the lowest element of a drill string, which encompasses all the elements of a downhole process from surface to rock bit.3. Parameters
Type | OD(mm) | ID(mm) | L(m) ±152.4mm d | DF(mm) ±0.4 |
NC23-31 | 79.4 | 31.8 | 9.14 | 76.2 |
NC26-35 | 88.9 | 38.1 | 9.14 | 82.9 |
NC31-41 | 104.8 | 50.8 | 9.14or9.45 | 100.4 |
NC35-47 | 120.6 | 50.8 | 9.14or9.45 | 114.7 |
NC38-50 | 127 | 57.2 | 9.14or9.45 | 121 |
NC44-60 | 152.4 | 57.2 | 9.14or9.45 | 144.5 |
NC44-60 | 152.4 | 71.4 | 9.14or9.45 | 144.5 |
NC46-62 | 158.8 | 57.2 | 9.14or9.45 | 149.2 |
NC46-62 | 158.8 | 71.4 | 9.14or9.45 | 150 |
NC46-65 | 165.1 | 57.2 | 9.14or9.45 | 154.8 |
NC46-65 | 165.1 | 71.4 | 9.14or9.45 | 154.8 |
NC46-67 | 171.4 | 57.2 | 9.14or9.45 | 159.5 |
NC50-70 | 177.8 | 57.2 | 9.14or9.45 | 164.7 |
NC50-70 | 177.8 | 71.4 | 9.14or9.45 | 164.7 |
NC50-72 | 184.2 | 71.4 | 9.14or9.45 | 169.5 |
NC56-77 | 196.8 | 71.4 | 9.14or9.45 | 185.3 |
NC56-80 | 203.2 | 71.4 | 9.14or9.45 | 190.1 |
6-5/8REG | 209.6 | 71.4 | 9.14or9.45 | 195.6 |
NC61-90 | 228.6 | 71.4 | 9.14or9.45 | 212.7 |
7-5/8REG | 241.3 | 76.2 | 9.14or9.45 | 223.8 |
NC70-97 | 247.6 | 76.2 | 9.14or9.45 | 232.6 |
NC70-100 | 254 | 76.2 | 9.14or9.45 | 237.3 |
8-5/8REG | 279.4 | 76.2 | 9.14or9.45 | 266.7 |
NC50-67 | 171.5 | 71.4 | 9.14or9.45 | 159.5 |
Mechanical Performance | |||||
OD | Yield Strength | Tensile Strength σb | Elongation | Reduction of are | Impact |
Size | σ0.2 | Mpa(psi) | δ4% | % | Ft.1b |
Mpa(psi) | |||||
3 1/8~6 3/4 | ≥758 | ≥827 | ≥18 | 50 | ≥50 |
-110,000 | -120,000 | ||||
7~10 | ≥689 | ≥758 | ≥20 | ||
-100,000 | -110,000 |
About Us
Maierda, located in Central China, is a professional supplier of petroleum equipment and tools.
Our factory has more than 15 years' experience in the R&D, production, sales and service of oilfield equipment and machinery.
Our sales team has more than 10 years importing & exporting experiences in the oil & gas industry.
Main Products
We are mainly engaged in oil field equipment and tools including drill collars, drill rods, drill bars, tubing couplings, casing couplings, crossovers, polished rod couplings, sucker rod couplings, polished rod clamps, sucker rod centralizers (guides), polished rod, sucker rod, pup joints, etc.
We also provide some other competitive products in the oil & gas field including casing centralizers, stop collar, tubing centralizer, drill pipe centralizer, float equipment (collar and shoe), cementing plugs, cementing heads, stage collars, cement baskets, hammer unions, chiksan swivel joints, etc.
Our Services
We are committed to providing high-quality and cost-effective products and services to our customers.
We guarantee and uphold the highest standards in customer service, client satisfaction, and quality product delivery in the oilfield industry.
Hope to have a good cooperation with you!
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