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Feature:
4 1/2" 8"API 4145h and Alloy Steel Drilling Tool Non-Magnetic Drill Collars
4 1/2" 8"API 4145h and Alloy Steel Drilling Tool Non-Magnetic Drill Collars
The Spiral Drill Collar is made from AISI 4145H modified alloy steel, and completely meets the requirement of API Spec 7-1 and SY/T5144 Standard. It is a kind of drill collar which adds three dextrogyrate spiral groove on the outer circle of ordinary drill collar when processing, and the purpose is to reduce the area of contact and friction with the well wall, which can effectively prevent the pressure sticking. The single weight of the spiral drill collar is round about 4% lighter than the ordinary drill collar with the same specification, and the shape and thread of the both ends are the same with the drill collar.
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Drill Collar Specification |
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|
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 |
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|
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 |
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|
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 |
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|
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 |
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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 |
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|
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 % |
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|
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 |
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|
Drill Collar Mechanical Performance |
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|
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 |
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|
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 |
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SEACO Oilfield Equip,is manufacturer & stockist of equipments,services and solutions to the upstream to downstream in oil & gas industry.We are aimed at helping customers to obtain the maximum from their each well.Providing our customers superior quality at the best value for products and services in order to ensure our customers' continued satisfaction.
Our main range include but not limited below:
1).Rig packages: 250hp to 3000hp Land drilling rigs; Workover rigs(Fast-moving rigs are available).
2).Rig components: Crown block;Travelling block; Hook; Swivel; Rotary table; Drawwork; Driller's cabin; MCC/SCR house; MCC/VD house; Top drive ect...
3).Wellhead & Pressure control equipments: BOP; Chock & Kill manifold; Pressure hoses; BOP closing unit; Casing&Tubing head; X-Mas tree; Valves; Spools and flanges ect...
4).Solid control & Mud system equipments: Shale shaker; Desander; Desilter; Mud cleaner; Hopper; Centrifuge; Agitator; Mud tanks; Unions,ect...
5).Tubulars & Drilling strings: Drill pipe; HWDP; Drill collar; Kelly; Casing; Tubing; Pup joint; Sucker rod; Line pipes ect...
6).Tubular Running and handing tools: Elevator; Slip; Manual/Power tong; HPU; Bushing; Spinner; Bit breaker; Spider; Links; Stuibing guide; Thread protector ect...
7).Downhole/Fishing tools: Drilling & Fishing jar; Stabilizers; Hole opener; Overshot; Drilling bit ect...
8).Cement tools: Cement unit;Float collar; Float shoe;Liner hanger;Cement head ect...
9).Others: Air winch; Drilling line; Safety equipments; Mud pump spare parts; Rig parts; Fittings ect...
10). Commissioning and other services.
Quality Control:
Quality admits no compromises.For this purpose.we exercise strict control on the starting materials.We ensure our equipments are manufactured to the international standards,producing per API,ISO or/and other applicable quality standards.We accentuate QA and QC monitoring & control processes to guarantee the quality.Our efforts is for providing the Customers with the peace of mind that when the equipment arrives on location,it is ready to go to work,and it will perform reliably.
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