US2022162730A1PendingUtilityA1
Pre-hardened steel composition and machine parts made therewith
Est. expiryNov 20, 2040(~14.3 yrs left)· nominal 20-yr term from priority
E21B 21/01F04B 53/166F04B 53/16F04B 15/02F04B 53/146F04B 1/00C22C 38/04C22C 38/02C22C 38/002C22C 38/42C22C 38/06C21D 9/0068C22C 38/44C22C 38/46C21D 2211/001F04B 53/00
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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 includes a piston, a cylinder, a drilling fluid module, a discharge manifold, and a strainer cross. At least one of the plunger, the drilling fluid module, the discharge manifold, and the strainer cross has the following composition in weight percent: 0.25-0.55% carbon, 0.70-1.50% manganese, a maximum of 0.025% phosphorous, a maximum of 0.050% sulfur, a maximum of 0.80% silicon, 0.10-0.80% nickel, 1.40-2.20% chromium, 0.10-0.55% molybdenum, a maximum of 0.030% vanadium, a maximum of 0.35% copper, a maximum of 0.040% aluminum, 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, a drilling fluid module, a discharge manifold, and a strainer cross at least one of the plunger, the drilling fluid module, the discharge manifold, and the strainer cross being made of a steel composition having the following composition in percent by weight:
C
0.20 - 0.55%,
Mn
0.70 - 1.50%,
P
0.025% max.,
S
0.050% max.,
Si
0.80% max.,
Ni
0.10 - 0.80%,
Cr
1.40 - 2.20%,
Mo
0.10 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.25 - 0.35%,
Mn
1.20 - 1.45%,
P
0.025% max.,
S
0.025% max.,
Si
0.15 - 0.40%,
Ni
0.35 - 0.70%,
Cr
1.70 - 2.05%,
Mo
0.35 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.30 - 0.35%,
Mn
1.20 - 1.35%,
P
0.010% max.,
S
0.010% max.,
Si
0.20 - 0.35%,
Ni
0.55 - 0.65%,
Cr
1.75 - 2.00%,
Mo
0.40 - 0.50%,
V
0.010% max.,
Cu
0.20% max.,
Al
0.025% max.,
Fe
balance, and
incidental impurities.
4 . The mud pump of claim 1 , wherein the mud pump component is produced from a block of steel manufactured by
a. melting the bulk of the steel composition containing the majority of the alloy ingredients in an electric arc furnace 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. heat treating the block by austenitizing, quenching and tempering.
5 . The mud pump of claim 4 , wherein the step of heat treating the block includes:
austenitizing at a temperature of between 800° and 950° C., quenching in water, and tempering at a temperature of between 450° and 700° C. to form a microstructure consisting mostly of tempered martensite and bainite or a mixture of tempered martensite, bainite and pearlite which will be deeper than ¼ of the thickness of the block.
6 . A machine part manufactured from a steel composition having the following composition in percent by weight:
C
0.20 - 0.55%,
Mn
0.70 - 1.50%,
P
0.025% max.,
S
0.050% max.,
Si
0.80% max.,
Ni
0.10 - 0.80%,
Cr
1.40 - 2.20%,
Mo
0.10 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.25 - 0.35%,
Mn
1.20 - 1.45%,
P
0.025% max.,
S
0.025% max.,
Si
0.15 - 0.40%,
Ni
0.35 - 0.70%,
Cr
1.70 - 2.05%,
Mo
0.35 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.30 - 0.35%,
Mn
1.20 - 1.35%,
P
0.010% max.,
S
0.010% max.,
Si
0.20 - 0.35%,
Ni
0.55 - 0.65%,
Cr
1.75 - 2.00%,
Mo
0.40 - 0.50%,
V
0.010% max.,
Cu
0.20% max.,
Al
0.025% max.,
Fe
balance, and
incidental impurities.
9 . The machine part of claim 6 , wherein the machine part is produced from a block of steel manufactured by
a. melting the bulk of the steel composition containing the majority of the alloy ingredients in an electric arc furnace 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 the block, and e. heat treating the block by austenitizing, quenching and tempering.
10 . The machine part of claim 9 , wherein the step of heat treating the block includes:
austenitizing at a temperature of between 800° and 950° C., quenching in water, and tempering at a temperature of between 450° and 700° C. to form a microstructure consisting mostly of tempered martensite and bainite or a mixture of tempered martensite, bainite and pearlite 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 fluid module
12 . The machine part of claim 6 , wherein the machine part is a discharge manifold.
13 . The machine part of claim 6 , wherein the machine part is a strainer cross.
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
0.20 - 0.55%,
Mn
0.70 - 1.50%,
P
0.025% max.,
S
0.050% max.,
Si
0.80% max.,
Ni
0.10 - 0.80%,
Cr
1.40 - 2.20%,
Mo
0.10 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.25 - 0.35%,
Mn
1.20 - 1.45%,
P
0.025% max.,
S
0.025% max.,
Si
0.15 - 0.40%,
Ni
0.35 - 0.70%,
Cr
1.70 - 2.05%,
Mo
0.35 - 0.55%,
V
0.030% max.,
Cu
0.35% max.,
Al
0.040% 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
0.30 - 0.35%,
Mn
1.20 - 1.35%,
P
0.010% max.,
S
0.010% max.,
Si
0.20 - 0.35%,
Ni
0.55 - 0.65%,
Cr
1.75 - 2.00%,
Mo
0.40 - 0.50%,
V
0.010% max.,
Cu
0.20% max.,
Al
0.025% max.,
Fe
balance, and
incidental impurities.
19 . The steel of claim 16 , wherein a block of the steel composition is prepared by:
a. melting the bulk of the steel composition containing the majority of the alloy ingredients in an electric arc furnace to produce a steel melt suitable for tapping into a receptacle, b. 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. heat treating the block by austenitizing, quenching and tempering.
20 . The steel of claim 19 , wherein the step of heat treating the block includes:
austenitizing at a temperature of between 800° and 950° C., quenching in water, and tempering at a temperature of between 450° and 700° C. to form a microstructure consisting mostly of tempered martensite and bainite or a mixture of tempered martensite, bainite and pearlite which will be deeper than ¼ of the thickness of the block.Join the waitlist — get patent alerts
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