US2020123628A1PendingUtilityA1
High strength and toughness steel composition and machine parts made therewith
Est. expiryFeb 1, 2036(~9.5 yrs left)· nominal 20-yr term from priority
C21D 6/005C22C 38/04C22C 38/06B22D 7/00C21D 6/008F04B 53/10C22C 33/04C22C 38/22C21D 6/002F04B 15/02C22C 38/02C22C 38/002F04B 53/00C21D 9/0068E21B 21/00E21B 21/01
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Claims
Abstract
A mud pump with components manufactured from high strength and toughness steel is disclosed. The mud pump includes a power end and a fluid end. The power end includes a motor, crankshaft rotationally engaged with the motor and a connecting rod rotationally engaged with the crank shaft. The fluid end is operatively connected to the power end and includes a piston, a cylinder configured to operatively engage the plunger, and a drilling fluid module. The crankshaft, the connecting rod, the piston, and the cylinder may each be fabricated from a high strength and toughness steel composition having the following composition in weight percent: 0.25-0.55% carbon, 0.70-1.50% manganese, a maximum of 0.80% silicon, 1.40-2.00% chromium, 0.10-0.55% molybdenum, a maximum of 0.040% aluminum, a maximum of 0.025% phosphorous, a maximum of 0.20% sulfur, a balance of iron, and incidental impurities.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A mud pump, comprising:
a power end having a motor, a crankshaft rotationally engaged with the motor, and a connecting rod rotationally engaged with the crankshaft; and a fluid end operatively connected to the power end and having a piston, a cylinder configured to operatively engage the plunger, and a drilling fluid module, the crankshaft, the connecting rod, the piston, and the cylinder each being made of a steel composition having the following composition in percent by weight:
C
0.25-0.55%,
Mn
0.70-1.50%,
Si
0.80% max.,
Cr
1.40-2.00%,
Mo
0.10-0.55%,
Al
0.040% max.,
P
0.025% max.,
S
0.20% max.,
Fe
balance, and
incidental impurities.
2 . The mud pump of claim 1 , wherein the steel composition comprises the following composition in percent by weight:
C
0.30-0.50%,
Mn
1.05-1.45%,
Si
0.60% max.,
Cr
1.50-2.00%,
Mo
0.10-0.45%,
Al
0.035% max.,
P
0.020% max.,
S
0.15% max.,
Fe
balance, and
incidental impurities.
3 . The mud pump of claim 1 , wherein the steel composition comprises the following composition in percent by weight:
C
0.35-0.45%,
Mn
1.15-1.35%,
Si
0.40% max.,
Cr
1.50-1.90%,
Mo
0.10-0.30%,
Al
0.030% max.,
P
0.015% max.,
S
0.003% max.,
Fe
balance, and
incidental impurities.
4 . The mud pump of claim 1 , wherein a mud pump component made of the steel composition is prepared in an electric arc furnace by:
a. melting the bulk of the steel composition containing the majority of the alloy ingredients to produce a steel melt suitable for tapping into a receptacle, b. thereafter tapping, heating, alloying, and refining the heat to bring the heat to its final composition, c. vacuum degassing, teeming and casting the heat by bottom pouring practices to form an ingot, d. hot working the ingot to form a mud pump component, and e. thereafter heat treating the mud pump component by water quenching and tempering to form a final hot work product.
5 . The mud pump of claim 5 , wherein the final hot work product is subsequently subjected to:
austenitizing at a temperature of between 800° and 900° C., quenching in water, and tempering at a temperature of between 500° and 700° C. to form a microstructure consisting mostly of bainite or a mixture of bainite and perlite which will be deeper than ¼ of the thickness of the block.
6 . A fabricated machine part manufactured from a steel composition having the following composition in percent by weight:
C
0.25-0.55%,
Mn
0.70-1.50%,
Si
0.80% max.,
Cr
1.40-2.00%,
Mo
0.10-0.55%,
Al
0.040% max.,
P
0.025% max.,
S
0.20% max.,
Fe
balance, and
incidental impurities.
7 . The machine part of claim 6 , wherein the steel composition comprises the following composition in percent by weight:
C
0.30-0.50%,
Mn
1.05-1.45%,
Si
0.60% max.,
Cr
1.50-2.00%,
Mo
0.10-0.45%,
Al
0.035% max.,
P
0.020% max.,
S
0.15% max.,
Fe
balance, and
incidental impurities.
8 . The machine part of claim 6 , wherein the steel composition comprises the following composition in percent by weight:
C
0.35-0.45%,
Mn
1.15-1.35%,
Si
0.40% max.,
Cr
1.50-1.90%,
Mo
0.10-0.30%,
Al
0.030% max.,
P
0.015% max.,
S
0.003% max.,
Fe
balance, and
incidental impurities.
9 . The machine part of claim 6 , wherein a fabricated machine part made of the steel composition is prepared from a melt of steel prepared in an electric arc furnace by:
a. melting the bulk of the steel composition containing the majority of the alloy ingredients to produce a steel melt suitable for tapping into a receptacle, b. thereafter tapping, heating, alloying, and refining the heat to bring the heat to its final composition, c. vacuum degassing, teeming and casting the heat by bottom pouring practices to form an ingot, d. hot working the ingot to form a fabricated machine part, and e. thereafter heat treating the fabricated machine part by water quenching and tempering to form a final hot work product.
10 . The machine part of claim 9 , wherein the final hot work product is subsequently subjected to:
austenitizing at a temperature of between 800° and 900° C., quenching in water, and tempering at a temperature of between 500° and 700° C. to form a microstructure consisting mostly of bainite or a mixture of bainite and perlite which will be deeper than ¼ of the thickness of the block.
11 . The machine part of claim 6 , wherein the machine part is a crankshaft.
12 . The machine part of claim 6 , wherein the machine part is a piston.
13 . The machine part of claim 6 , wherein the machine part is a gear.
14 . The machine part of claim 6 , wherein the machine part is a component of oil field exploration machinery.
15 . The machine part of claim 6 , wherein the machine part is a component of a mud pump.
16 . A steel comprising the following composition in percent by weight:
C
0.25-0.55%,
Mn
0.70-1.50%,
Si
0.80% max.,
Cr
1.40-2.00%,
Mo
0.10-0.55%,
Al
0.040% max.,
P
0.025% max.,
S
0.20% max.,
Fe
balance, and
incidental impurities.
17 . The steel of claim 16 , wherein the steel composition comprises the following composition in percent by weight:
C
0.30-0.50%,
Mn
1.05-1.45%,
Si
0.60% max.,
Cr
1.50-2.00%,
Mo
0.10-0.45%,
Al
0.035% max.,
P
0.020% max.,
S
0.15% max.,
Fe
balance, and
incidental impurities.
18 . The steel of claim 16 , wherein the steel composition comprises the following composition in percent by weight:
C
0.35-0.45%,
Mn
1.15-1.35%,
Si
0.40% max.,
Cr
1.50-1.90%,
Mo
0.10-0.30%,
Al
0.030% max.,
P
0.015% max.,
S
0.003% max.,
Fe
balance, and
incidental impurities.
19 . The steel of claim 16 , wherein a block of the steel composition is prepared in an electric arc furnace by:
a. melting the bulk of the steel composition containing the majority of the alloy ingredients to produce a steel melt suitable for tapping into a receptacle, b. thereafter tapping, heating, alloying, and refining the heat to bring the heat to its final composition, c. vacuum degassing, teeming and casting the heat by bottom pouring practices to form an ingot, d. hot working the ingot to form a block, and e. thereafter heat treating the block by water quenching and tempering to form a final hot work product.
20 . The steel of claim 19 , wherein the final hot work product is subsequently subjected to:
austenitizing at a temperature of between 800° and 900° C., quenching in water, and tempering at a temperature of between 500° and 700° C. to form a microstructure consisting mostly of bainite or a mixture of bainite and perlite which will be deeper than ¼ of the thickness of the block.Join the waitlist — get patent alerts
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