Steel Drill Rods of the Heavy series SDRH to KSSK-76
(TC 41-01-677-94)
|
|
|
Drill rods SDRH to KSSK-76 are intended for drilling wells with diamond crowns with diameter 76mm in soils V-IX categories in drillability.
The nominal drilling depth depending on the assembly of drill rods: 1200, 2000 or 3000 meters.
|
|
Drawing 7 – Steel Drill Rods of the Heavy series SDRH to KSSK-76
Table 15 – Technical characteristics of drill rods SDRH
|
|
Marking-off standard size
|
Basic dimensions, mm
|
Length of the rod L. m
|
Special tapered thread
|
Moment of the threading joint’s balk, Newton ´ meter (±5%)
|
|
Body of the rod
|
Tool joint
|
|
Outside diameter D
|
Wall thickness S
|
Outside diameter D1
|
Inside diameterd1
|
|
SDRH - 70
|
70
|
4.5
|
73
|
53
|
1.5 – 6.2
|
Sp.К-70
|
4000
|
Table 16 – Mechanical properties of the material of the drill rod and the tool joint
|
Parameters
|
Parameters (no less)
|
|
Body of the drill rod
|
Tool joint’s details
|
|
Steel 36G2S
|
Steel 45
|
Steel 40XH
|
|
Temporary resistance σtemp, Mega Paskal
|
686 (70)
|
539 (55)
|
882 (90.0)
|
|
Yielding (fluidity) σyielding, Mega Paskal
|
490 (50)
|
323 (33)
|
686 (70.0)
|
|
Relative elongation, %
|
12
|
16
|
15
|
|
Hardness of the core, HRC
|
-
|
-
|
26
|
Note:
1. Mechanical properties of the material of the drill rod’s body are shown after the normalization and it is spread for the weld-on seam.
2. Mechanical properties of the details’ material of tool joints are shown after the volumetric thermal treatment
(increasing).
3. Exposed hardness after the quenching with High Frequency Currents(HFC):
body of the rod –min 40 HRC
tool joint’s details- min 55 HRC
|
-76
(TC 41-01-677-94)
