Specifications for used drill pipe
| CONDITION |
|
PREMIUM CLASS |
CLASS 2 |
| TUBES |
Min. remaining wall hickness
Slip cuts and gouges2 (Depth)
Diameter reduction
Diameter increase
Cracks
|
> 80%
< 10% of Avg. adjacent wall3
< 3% of specified OD
< 3% of specified OD
None
|
> 70%
< 20% of Avg. adjacent wa ll3
< 4% of specified OD
< 4% of specified OD
None |
TOOL
JOINTS |
Torsional strength
Pin stretch
Other dimensions
Cracks
|
> 80% of a Premium Class Tube
< 0.006" in 2"
As specified in Table 3.7
None |
> 80% of a Class 2 Tube
< 0.006" in 2"
As specified in Table 3.7
None |
1. Minimum remaining wall thickness must be _>80% under transverse cuts and gouges.
2. Cuts and gouges may be removed by grinding provided the remaining wall is not reduced below the minimum remaining wall shown in this table.
3. Average adjacent wall is determined by averaging the wall thickness on each side of the imperfection adjacent to the deepest penetration.
Nom. OD
(in) |
Nom. Wt
(Ib/ft)
|
ID
(in) |
Minimum
Wall (80°/a)
|
OD (in)
Min |
Minimum
Wall (70°/a) |
OD (in) |
| Min |
Max |
Min |
Max |
| 2-3/8 |
4.85
6.65 |
1.995
1.815
|
.152
.224 |
2.304 |
|
2.446
.196 |
.133 2.280 |
2.470 |
| 2-7/8 |
6.85
10.40 |
2.441
2.151 |
.174
.290 |
2.789 |
|
2.961
.253 |
.152 2.760 |
2.990 |
| 3-1/2 |
9.50
13.30
15.50 |
2.992
2.764
2.602 |
.203
.294
.359 |
3.395 |
|
3.605
.258
.314
|
.178 3.360 |
3.640 |
| 4 |
11.85
14.00
15.70 |
3.476
3.340
3.240 |
.210
.264
.304
|
3.880 |
|
4.120
.231
.266 |
.183 3.840 |
4.160 |
| 4-1/2 |
13.75
16.60
20.00
22.82 |
3.958
3.826
3.640
3.500
|
.217
.270
.344
.400 |
4.365 |
|
4.635
.236
.301
.350 |
.190 4.320 |
4.680 |
| 5 |
16.25
19.50
25.60 |
4.408
4.276
4.000 |
.237
.290
.400 |
4.850 |
|
5.150
.253
.350 |
.207 4.800 |
5.200 |
| 5-1/2 |
19.20
21.90
24.70
|
4.892
4.778
4.670 |
.243
.289
.332 |
5.335 |
|
5.665
.253
.290 |
.213 5.280 |
5.720 |
| 6-5/8 |
25.20
27.70 |
5.965
5.901 |
.264
.290 |
6.426 |
|
6.824
.253 |
.231 6.360 |
6.890 |
|
