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US 9,435,333 B2Granted
Corrosion resistant fluid end for well service pumps
AssigneeHalliburton Energy Services, Inc.
InventorsTerry H. McCoy, David M. Stribling, John Dexter Brunet, Stanley V. Stephenson, Timothy A. Freeney
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Abstract
Corrosion resistant alloys in fluid ends to prolong the life of a well service pump. Methods of using such corrosion resistant alloys that provide a fluid end that has a corrosion resistant alloy having a fatigue limit greater than or equal to the tensile stress on the fluid end at maximum working pressure in the fluid end for an aqueous-based fluid; installing the fluid end in a well service pump; and pumping the aqueous-based fluid through the fluid end.
Claims12
A method comprising:
- providing a well service pump;
- providing a fluid end body that comprises a corrosion resistant alloy (a) having a fatigue limit of at least 75 ksi and (b) comprising chromium as an alloying element at 5% or greater by weight of the corrosion resistant alloy;
- installing the fluid end body in the well service pump;
- and
- pumping an aqueous-based fluid through the fluid end body, wherein the fatigue limit is greater than or equal to a tensile stress assumed by the fluid end body when the well service pump operates at maximum working pressure while pumping the aqueous-based fluid, wherein the aqueous-based fluid has a salt concentration of about 4% by weight or greater.
2 more elements
A method comprising:
- providing a well service pump;
- providing a fluid end body comprising a corrosion resistant alloy (a) having a fatigue limit of at least 75 ksi and (b) comprising chromium at 5% or greater by weight of the corrosion resistant alloy coupling the fluid end body to the well service pump;
- and
- pumping an aqueous-based fluid through the fluid end body, wherein the aqueous-based fluid includes a corrosion inhibitor and the fatigue limit is greater than or equal to a tensile stress assumed by the fluid end body when the well service pump operates at maximum working pressure while pumping the aqueous-based fluid with corrosion inhibitor, wherein the aqueous-based fluid has a salt concentration of about 4% by weight or greater.
1 more element
A method comprising:
- providing a well service pump that comprises a fluid end body made from a corrosion resistant alloy having a fatigue limit of at least 75 ksi, the corrosion resistant alloy comprising:
- iron;
- chromium in an amount of from about 5% to about 20%;
- and
- an alloying element selected from the group consisting of:
- molybdenum, copper, niobium, and any combination of these;
- pumping a fracturing fluid through the fluid end body, wherein the fatigue limit is greater than or equal to a tensile stress assumed by the fluid end body when the well service pump operates at maximum working pressure while pumping the fracturing fluid;
- and
- performing a fracturing treatment using the well service pump wherein the fracturing fluid has a salt concentration of about 4% by weight or greater.
6 more elements
Dependencies are inferred from the claim text.