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Drill Collar (Slick and Spiral) Product Offer
  • Drill Collare is manufactured in accordance with  API Specification 7, Latest Edition.
  • Drill Collar is mainly used to provide bit weight to drill bit so that drill pipe is in tension. Especially, drill collar can keep drill bit centralized and hole track by large rigidity.
  • Spiral Drill Collar is used to reduce contact area with a hole so as to avoid efficiently bit sticking from differential pressure.
  • Spiral drill collars are manufactured strictly to API Spec.7, all mechanical properties meet with above standard.
  • All Drill Collars have an API Monogram.

  • Range of products:
Tool Joint Type
Outside Diameter
Inside Diameter
Length, mm
mm
Inch
mm
Inch
 
NC23-31 (2 3/8" REG)
79.40
3  1/8
31.8
1 1/4
9 150
 
NC26-35 (2 3/8" IF)
79.40
3  1/8
31.8
1 1/4
9 150
 
NC31-41 (2 7/8" IF)
88.90
3  1/2
38.1
1 1/2
9 150
 
NC35-47
104.80
4  1/8
50.8
2
9 150
 
NC38-50 (3 ½" IF)
120.7
4  3/4
50.8
2
9 150
 
NC44-60 
127.0
5
57.2
2 1/4
9 150
 
NC44-60
152.4
6
57.2
2 1/4
9 150 (или) 9 450
 
NC44-62
152.4
6
71.4
2 13/16
9 150 (или) 9 450
 
NC46-62 (4" IF)
158.8
6  1/4
57.2
2  1/4
9 150 (или) 9 450
 
NC46-65 (4" IF)
158.8
6  1/4
71.4
2 13/16
9 150 (или) 9 450
 
NC46-67 (4" IF)
165.1
6  1/2
57.2
2 13/16
9 150 (или) 9 450
 
NC50-67 (4½" IF)
165.1
6  1/2
57.2
2 13/16
9 150 (или) 9 450
 
NC50-70 (4 ½" IF)
171.4
6  3/4
57.2
2 13/16
9 150 (или) 9 450
 
NC50-70 (4 ½" IF)
171.4
6  3/4
71.4
2 13/16
9 150 (или) 9 450
 
NC50-72 (4 ½" IF)
177.8
7
57.2
2  1/4
9 150 (или) 9 450
 
NC50-70 (4 ½" IF)
177.8
7
71.4
2 13/16
9 150 (или) 9 450
 
NC50-72 (4 ½" IF)
184.2
7  1/4
71.4
2 13/16
9 150 (или) 9 450
 
NC56-77 
196.8
7  3/4
71.4
2 13/16
9 150 (или) 9 450
 
NC56-80 
203.2
8
71.4
2 13/16
9 150 (или) 9 450
 
6 5/8" REG
209.6
8  1/4
71.4
2 13/16
9 150 (или) 9 450
 
NC61-90
228.6
9
71.4
2 13/16
9 150 (или) 9 450
 
7 5/8" REG
241.3
9  1/2
76.2
3
9 150 (или) 9 450
 
NC70-97 
247.6
9  3/4
76.2
3
9 150 (или) 9 450
 
NC70-100 
254.0
10
76.2
3
9 150 (или) 9 450
 
8 5/8" REG
279.4
11
76.2
3
9 150 (или) 9 450
  • Note:

     Drill Collars of all other intermediate sizes or different dimensions can be manufectured on customer's request.

  • Sizes for Drill collar spiral groove
 
OD
Сutting Depth A (mm)
Stroke (mm) ±25.4
Cutting Depth B (mm)
mm
 Inch
98.4
3 7/8
4.0±0.79
914
-
101.6-111.1
4~4 3/8
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 1/8
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
1626
5.6±0.79
203.2-225.4
8~8 7/8
9.5±1.59
1727
6.4±0.79
228.6-250.8
9~9 7/8
10.3±2.37
1829
7.1±1.59
254.0-276.2
10~10 7/8
11.1±2.37
1930
7.9±1.59
279.4
11
10.9±2.37
2032
8.7±1.59

  •  Manufacture&Delivery:

     - Packed in bundles with max weight of 5MT

     - Quality Certificate as per EN 10204/3.1.B.
 
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