Casing & Tubing
Standard：
API SPEC 5CT Standard of American Petroleum Institute
Steel Grade:
J55, K55, N80, L80, N80-1, N80Q P110 etc．
Diamensional tolerances:
Types of steel tubes Outer diameter Wall thickness
Cold-rolled tubes Tube sizes
(mm) Tolerances(mm) Tolerances(mm)
＜114.3 ±0.79 －12.5％
≥114.3 －0.5％，＋1％
Mechanical properties：
Standard codes Models of steel tubes Tensite strength（MPa） Yield strength（MPa） Elongation（％） Hardness
API SPEC 5CT J55 ≥517 379～552 check the table
K55 ≥517 ≥655
N80 ≥689 552～758
L80(13Cr) ≥655 552～655 ≤241HB
P110 ≥862 758～965
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Drill Collar |
Drill Collar
Usage :
One of the most important components of the drill string is to provide drilling bit of pressure and the drill string rigid r... |
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SHOCK ABSORBER |
Type SJ
Shock Absorber Type SJ should be connected with the drilling string close to the bit. It can reduce or absorb both longitudinal and circum... |
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Valves |
Check Valve
Usually used for Kill Manifold
The sealing face of core and seat is overlaying-welded with hard alloy with erosion and corrosion resi... |
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Traveling Block & Hook |
Design Features：
The housing assembly is made of thick section steel plate to provide enough weight.
The wire line is kept taut when hoisting or ... |
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Downhole Motor |
Downhole Motor
Downhole motor is a kind of downhole dynamic drilling tool upon the power of drilling mud. Mud stream from the outlet of mud pump fl... |
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