Shaanxi FORUS Petroleum Machinery Equipment Co., Ltd
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Special Alloy Steel Solid Bar AISI4145H OD 1 4" To 15"
Oil drilling tool steel 4145H
Electric arc furnace + out - of - furnace refining
Steel group: structural steel
Sub-class: AISI 4145H Steel
Chemical composition
The size of the elements is approximate
C 0.4200 0.4900
Si 0.1500 0.3500
Mn 0.6500 1.100
P 0.0350
S 0.0400
Cr 0.7500 1.200
Mo 0.1500 0.2500
Application
The raw material of the overall weighted drill pipe is AISI 4145H alloy structural steel. The production process is strictly in accordance with
SY/T5146-1997 standard. The weighted drill pipe is a kind of medium weight drilling tool similar to drill pipe, whose wall thickness is larger than
drill pipe and smaller than drill collar. It is generally added between drill pipe and drill collar when forming drill string to prevent sudden change of
drill string section and reduce fatigue of drill pipe. When used in directional Wells, the drill string can be drilled at high speed with low torque,
which reduces wear and breakage of drill string. Due to its smaller rigidity than drill collar and small contact area with borehole wall, it is not easy
to form differential pressure stuck drill string.
