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| Drill Collar |
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| Products Described : |
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Standard : According to API standards
Material : AISI 4145 H or Non-magnetic material
Types : Slick drill collars,Spiral drill collars,Non-mag material drill collars
Specification:
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Satand size,bores and connection for drill collar |
|
OD |
ID |
Length mm |
Style of connection |
Bevel diameter mm |
Bending strength ratio |
|
mm |
in |
mm |
in |
|
79.4 |
3 1/8 |
31.8 |
1 1/4 |
9150 |
NC23-31 |
76.2 |
2.57:1 |
|
88.9 |
3 1/2 |
38.1 |
1 1/2 |
9150 |
NC26-35(23/8IF) |
82.9 |
2.42:1 |
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104.8 |
4 1/8 |
50.8 |
2 |
9150 |
NC31-41(27/8IF) |
100.4 |
2.43:1 |
|
120.7 |
4 3/4 |
50.8 |
2 |
9150 |
NC35-47 |
114.7 |
2.58:1 |
|
127.0 |
5 |
57.2 |
2 1/4 |
9150 |
NC3850(31/2IF) |
121.0 |
2.38:1 |
|
152.4 |
6 |
57.2 |
2 1/4 |
9150or9450 |
NC44-60 |
144.5 |
2.49:1 |
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158.8 |
6 1/4 |
57.2 |
2 1/4 |
9150or9450 |
NC44-62 |
149.2 |
2.91:1 |
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158.8 |
6 1/4 |
71.4 |
2 13/16 |
9150or9450 |
NC46-62(4IF) |
150.0 |
2.63:1 |
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165.1 |
6 1/2 |
57.2 |
2 1/4 |
9150or9450 |
NC46-65(4IF) |
154.8 |
2.76:1 |
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165.1 |
6 1/2 |
71.4 |
2 13/16 |
9150or9450 |
NC46-65(4IF) |
154.8 |
3.05:1 |
|
171.4 |
6 3/4 |
57.2 |
2 1/4 |
9150or9450 |
NC46-67(4IF) |
159.5 |
3.18:1 |
|
171.4 |
6 3/4 |
71.4 |
2 13/16 |
9150or9450 |
NC50-67(41/2IF) |
159.5 |
2.37:1 |
|
177.8 |
7 |
57.2 |
2 1/4 |
9150or9450 |
NC50-70(41/2IF) |
164.7 |
2.54:1 |
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177.8 |
7 |
71.4 |
2 13/16 |
9150or9450 |
NC50-70(41/2IF) |
164.7 |
2.73:1 |
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184.2 |
7 1/4 |
71.4 |
2 13/16 |
9150or9450 |
NC50-72(41/2IF) |
169.5 |
3.12:1 |
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196.8 |
7 3/4 |
71.4 |
2 13/16 |
9150or9450 |
NC50-77 |
185.3 |
2.70:1 |
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203.2 |
8 |
71.4 |
2 13/16 |
9150or9450 |
NC50-80 |
190.1 |
3.02:1 |
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209.6 |
8 1/4 |
71.4 |
2 13/16 |
9150or9450 |
6 5/8REG |
195.7 |
2.93:1 |
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228.6 |
9 |
71.4 |
2 13/16 |
9150or9450 |
NC61-90 |
212.7 |
3.17:1 |
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241.3 |
9 1/2 |
76.2 |
3 |
9150or9450 |
7 5/8REG |
223.8 |
2.81:1 |
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247.6 |
9 3/4 |
76.2 |
3 |
9150or9450 |
NC70-97 |
232.6 |
2.57:1 |
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254.0 |
10 |
76.2 |
3 |
9150or9450 |
NC70-100 |
237.3 |
2.81:1 |
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279.4 |
11 |
76.2 |
3 |
9150or9450 |
8 5/8REG |
266.7 |
2.84:1 |
Mechanical Property ：
Mechanical Property of Slick and Spiral drill collars made of AISI 4145 H
|
OD Range |
Yield Strength(MPa) |
Tensile Strength(MPa) |
Elongation (%) |
Hardness (HB) |
Impact Test(J) |
|
mm |
in |
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79.4-171.4 |
3 1/8-6 3/4 |
≥758 |
≥965 |
≥13 |
285～341 |
≥54 |
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177.8-279.4 |
7--11 |
≥689 |
≥930 |
≥13 |
285～341 |
≥54 |
Non-magnetic Drill Collars
Materials of the Non--magnetic drill collars are from chrome manganese, low carbon austenitic alloy obtained by combining a proprietary chemical analysis and a rotary hammer forging process. The material is resistant to stress corrosion cracking, with high mechanical properties, low magnetic permeability, excellent mechanical capability.
Magnetic permeability
Max: 1.010.
Average: 1.005.
Magnetic Field Gradient (hot spots):
Max: B 0.05 micro Tesla/100mm.
Mechanical Properties:
|
Tensile strength |
Yield strength (at 0.2%) |
Elongation% |
Reduction of area % |
Charpy impact value |
|
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Min. Mpa |
Min. Psi |
Min. Mpa |
Min. Psi |
25 |
50 |
Min.50ft.1b |
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823 |
118,000 |
689 |
99,000 |
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Note:
1.This table is derived from test samples of steel taken from a point 1" below the surface.
2.On inquiries and orders please specify:
Outside diameter.
Length.
Connection Style.
Stress relief grooves.
Elevator and slip recess.
Special features (magnets, scribe--line, top landing device, spiral grooves.)
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