Beijing Ocean Renda Petroleum Equipment Co., Ltd.
Beijing Ocean Renda Petroleum Equipment Co., Ltd.
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High quality API Drill Collars for oilfield using , Drilling String
Specifications:
Drill Collars Parameter
|
Size OD |
Bore |
Connection |
Weight (kg) |
Bevel |
|
|
(in/mm) |
(in/mm) |
Type |
30 feet |
31 feet |
Diameter |
|
3 1/8 (79.4) |
1 1/4 (31.8) |
NC23 |
296 |
306 |
76.2 |
|
3 1/2 (88.9) |
1 1/2 (38.1) |
NC26 |
358 |
370 |
82.9 |
|
4 1/8 (104.8) |
2 (50.8) |
NC31 |
469 |
485 |
100.4 |
|
4 3/4 (120.7) |
2 (50.8) |
NC 35 |
629 |
650 |
114.7 |
|
5 (127) |
2 1/4 (57.2) |
NC38 |
716 |
740 |
121 |
|
6 (152.4) |
2 1/4 (57.2) |
NC44 |
1114 |
1151 |
144.5 |
|
6 (152.4) |
2 13/16 (71.4) |
4 1/2 FH |
1011 |
1045 |
144.5 |
|
6 1/4 (158.8) |
2 1/4 (57.2) |
NC46 |
1224 |
1265 |
149.2 |
|
6 1/4 (158.8) |
2 13/16 (71.4) |
NC46 |
1123 |
1160 |
150 |
|
6 1/2 (165.1) |
2 1/4 (57.2) |
NC46 |
1340 |
1385 |
154.8 |
|
6 1/2 (165.1) |
2 13/16 (71.4) |
NC50 |
1237 |
1278 |
154.8 |
|
6 3/4 (171.4) |
2 1/4 (57.2) |
NC46 |
1024 |
1058 |
159.5 |
Connection Interchange List
|
NC (numbered Conn.) |
26 |
31 |
38 |
40 |
46 |
50 |
|
IF (internal flush) |
2 3/8 |
2 7/8 |
3 1/2 |
|
4 |
4 1/2 |
|
FH (full hole) |
|
|
|
4 |
|
|
|
SH (slim hole) |
2 7/8 |
3 1/2 |
4 1/2 |
|
|
|
|
XH (extra hole) |
|
|
|
|
4 1/2 |
5 |
API Mechanical Properties of Drill Collars
|
Outside Diameter |
Outside Diameter |
Tensile Strength |
Yield Strength |
Elongation (L=4D) |
Impact AKV |
Brinell Hardness |
|
Inch |
mm |
Mpa |
Mpa |
% |
J |
HB |
|
3 1/8-6 3/4 |
79.4-171.4 |
≥965 |
≥758 |
≥13 |
≥54 |
≥285 |
|
7-10 |
177.8-254 |
≥930 |
≥689 |
≥13 |
≥54 |
≥285 |