Complaint
Feature:
API 51 /2" 8" Nmdc Non-Magnetic Drill Collar 9meter
The Spiral Drill Collar of seaco is made from AISI 4145H modified alloy steel, and completely meets the requirement of API Spec 7-1 and SY/T5144 Standard.
API non-magnetic drill collar
API 51 /2" 8" Nmdc Non-Magnetic Drill Collar 6 5/8 FH
non-magnetic drill collar (spiral drill collar)
API 51 /2" 8" Nmdc Non-Magnetic Drill Collar 9meter
11" non-magnetic drill collar
Standard:API Spec 7
Material:AISI 4145H, AISI 4145 H Modidied,Non-mag material
Specification:
OD:3 1/8"-11"
Length:10'-31'
API non-magnetic drill collar
API 51 /2" 8" Nmdc Non-Magnetic Drill Collar 6 5/8 FH
Drill Collar Specification | ||||||||
Thread Type | O.D. | I.D. | Length | Diameter of shoulder guide Angle | Reference bending strength ratio | |||
mm | inch | mm | inch | mm | inch | |||
NC23-31 | 79.4 | 31/8 | 31.8 | 11/4 | 9150 | 30ft | 76.2 | 2.57:1 |
NC26-35(23/8IF) | 88.9 | 31/2 | 38.1 | 11/2 | 82.9 | 2.42:1 | ||
NC31-41(27/8IF) | 104.8 | 41/8 | 50.8 | 2 | 100.4 | 2.43:1 | ||
NC35-47 | 120.7 | 43/4 | 50.8 | 2 | 114.7 | 2.58:1 | ||
NC38-50(31/2IF) | 127 | 5 | 57.2 | 21/4 | 121 | 2.38:1 | ||
NC44-60 | 152.4 | 6 | 57.2 | 21/4 | 9150or9450 | 30ftor31ft | 144.5 | 2.49:1 |
NC44-60 | 152.4 | 6 | 71.4 | 213/16 | 144.5 | 2.84:1 | ||
NC44-62 | 158.8 | 61/4 | 57.2 | 21/4 | 149.2 | 2.91:1 | ||
NC46-62(4IF) | 158.8 | 61/4 | 71.4 | 213/16 | 150 | 2.63:1 | ||
NC46-65(4IF) | 165.1 | 61/2 | 57.2 | 21/4 | 154.8 | 2.76:1 | ||
NC46-65(4IF) | 165.1 | 61/2 | 71.4 | 213/16 | 154.8 | 3.05:1 | ||
NC46-67(4IF) | 171.4 | 63/4 | 57.2 | 21/4 | 159.5 | 3.18:1 | ||
NC50-67(41/2IF) | 171.4 | 63/4 | 71.4 | 213/16 | 159.5 | 2.37:1 | ||
NC50-70(41/2IF) | 177.8 | 7 | 57.2 | 21/4 | 164.7 | 2.54:1 | ||
NC50-70(41/2IF) | 177.8 | 7 | 71.4 | 213/16 | 164.7 | 2.37:1 | ||
NC50-72(41/2IF) | 184.2 | 71/4 | 71.4 | 213/16 | 169.5 | 3.12:1 | ||
NC56-77 | 196.8 | 73/4 | 71.4 | 213/16 | 185.3 | 2.70:1 | ||
NC56-80 | 203.2 | 8 | 71.4 | 213/16 | 190.1 | 3.02:1 | ||
65/8REG | 209.6 | 81/4 | 71.4 | 213/16 | 195.7 | 2.93:1 | ||
NC61-90 | 228.6 | 9 | 71.4 | 213/16 | 212.7 | 3.17:1 | ||
75/8REG | 241.3 | 91/2 | 76.2 | 3 | 223.8 | 2.81:1 | ||
NC70-97 | 247.6 | 93/4 | 76.2 | 3 | 232.6 | 2.57:1 | ||
NC70-100 | 254 | 10 | 76.2 | 3 | 237.3 | 2.81:1 | ||
85/8REG | 279.4 | 11 | 76.2 | 3 | 266.7 | 2.84:1 | ||
Note: 1.Drill collar thread type: NC-Digital IF-Internal flat type REG-Normal type | ||||||||
2.Bending strength ratio: the ratio of the modulus of the cross section and the modulus of the cross section of the cross section of the dangerous section of the inner thread | ||||||||
In addition, our company can produce the drill collar and spiral drill collar, which can also produce the special specifications of the drill collar and the high efficiency and wear-resisting lengthening drill collar | ||||||||
O.D. | cutting depth | Lead ±25.4 | ||
mm | in | A(mm) | B(mm) | mm |
86 | 3.375 | 3.5±0.79 | / | 679 |
98.4 | 3.875 | 4.0±0.79 | / | 914 |
101.6~111.1 | 4~4 1/8 | 4.8±0.79 | / | 914 |
114.3~130.2 | 4 1/2~5 1/8 | 5.6±0.79 | / | 965 |
133.4~146.1 | 5 1/4~5 3/4 | 6.4±0.79 | / | 1067 |
149.2~161.9 | 5 7/8~6 3/8 | 7.1±1.59 | / | 1067 |
165.1~177.8 | 6 1/2~7 | 7.9±1.59 | / | 1168 |
181.0~200.0 | 7 1/8~7 7/8 | 8.7±1.59 | 5.6±0.79 | 1626 |
203.2~225.4 | 8~8 7/8 | 9.5±1.59 | 6.4±0.79 | 1727 |
228.6~250.8 | 9~9 7/8 | 10.3±2.37 | 7.1±1.59 | 1829 |
254.0~276.2 | 10~10 7/8 | 11.1±2.37 | 7.9±1.59 | 1930 |
279.4 | 11 | 11.9±2.37 | 8.7±1.59 | 2032 |
Advantages of Drill Collar Production Process
In the process of heat treatment, the drill collar has added a special normalizing process, which makes the thread part grain more refined, enhances the drill collar thread strength, and effectively improves the service life of the drill collar.
Sreel Mark | Chemical Composition % | ||||||||
C | Si | Mn | P | S | Cr | Mo | Cu | Al | |
4145H | 0.42~0.48 | 0.15~0.35 | 0.90~1.20 | ≤0.03 | ≤0.03 | 0.90~1.20 | 0.15~0.25 | ≤0.2 | 0.025~0.045 |
Other Elements:N≤0.015,Ni≤0.5 | |||||||||
Drill Collar Mechanical Performance | ||||||||
Drill Collar Outside Diameter Range | Yield Strength | Tensile Strength | Elongation |
| Charpy Impact | |||
mm | in | MPa | Psi | MPa | Psi | |||
79.4~171.4 | 3-1/8~6-3/4 | ≥758 | ≥110000 | ≥965 | ≥140000 | ≥13 | 285~341 | ≥54 |
177.8~279.4 | 7~11 | ≥689 | ≥100000 | ≥930 | ≥135000 | ≥13 | 285~341 | ≥54 |
Under special conditions, the impact work of the charpy can be determined as greater than 70J according to the supply and demand | ||||||||
Size | O.D(mm) | I.D.(mm) | Code | Thread | Length(mm) | Weight(kg) |
3-1/8 | 79.4 | 31.8(1-1/4) | NC23-31 | NC23 | 9140 | 298 |
3-1/2 | 88.9 | 38.1(1-1/2) | NC26-35 | NC26 | 9140 | 364 |
4-1/8 | 104.8 | 50.8(2) | NC31-41 | NC31 | 9140/9450 | 474/490 |
4-3/4 | 120.6 | 50.8(2) | NC35-47 | NC35 | 9140/9450 | 674/697 |
5 | 127.0 | 57.2(2-1/4) | NC38-50 | NC38 | 9140/9450 | 725/749 |
6 | 152.4 | 57.2(2-1/4) | NC44-60 | NC44 | 9140/9450 | 1125/1163 |
71.4(2-13/16) | NC44-60 | 9140/9450 | 1022/1056 | |||
6-1/4 | 158.8 | 57.2(2-1/4) | NC44-62 | NC44 | 9140/9450 | 1237/1279 |
71.4(2-13/16) | NC46-62 | 9140/9450 | 1134/1172 | |||
6-1/2 | 165.1 | 57.2(2-1/4) | NC46-65 | NC46 | 9140/9450 | 1352/1398 |
71.4(2-13/16) | NC46-65 | NC50 | 9140/9450 | 1249/1291 | ||
6-3/4 | 171.4 | 57.2(2-1/4) | NC46-67 | NC46 | 9140/9450 | 1471/1521 |
7 | 177.8 | 57.2(2-1/4) | NC50-70 | NC50 | 9140/9450 | 1597/1651 |
71.4(2-13/16) | NC50-70 | 9140/9450 | 1494/1545 | |||
7-1/4 | 184.2 | 71.4(2-13/16) | NC50-72 | NC50 | 9140/9450 | 1625/1680 |
7-3/4 | 196.8 | 71.4(2-13/16) | NC56-77 | NC56 | 9140/9450 | 1895/1960 |
8 | 203.2 | 71.4(2-13/16) | NC56-80 | NC56/6-5/8REG | 9140/9450 | 2040/2109 |
8-1/4 | 209.6 | 71.4(2-13/16) | 6-5/8REG | 6-5/8REG | 9140/9450 | 2188/2263 |
9 | 228.6 | 71.4(2-13/16) | NC61-90 | NC61 | 9140/9450 | 2658/2748 |
9-1/2 | 241.3 | 76.2(2-13/16) | 7-5/8REG | 7-5/8REG | 9140/9450 | 2954/3054 |
9-3/4 | 247.6 | 76.2(3) | NC70-97 | NC70 | 9140/9450 | 3127/3234 |
10 | 254.0 | 76.2(3) | NC70-100 | NC70 | 9140/9450 | 3308/3421 |
11 | 279.4 | 76.2(3) | 8-5/8REG | 8-5/8REG | 9140/9450 | 4072/4210 |
Mechanical properties:<7 inch Drill Collar:Yield Strength≥758MPa,Tensile Strength≥965MPa,Four times elongation≥13%,Impact energy Ak≥54J,(Single impact work≥47J,Average≥54J)Hardness range 285HB~341HB≥7inch Drill Collar:Yield Strength≥689MPa,Tensile Strength≥931MPa,Four times elongation≥13%,Impact energy Ak≥54J,(Single impact work≥47J,Average≥54J) Hardness range 285HB~341HB | ||||||
