Reciprocating pump with dual circuit power end lubrication system
First Claim
1. A dual circuit lubrication system for a power end of a reciprocating pump, comprising:
- a first lubrication pump supplying a lubrication fluid to a high pressure lubrication circuit at a first lubrication fluid pressure;
a second lubrication pump supplying the lubrication fluid to a low pressure lubrication circuit at a second lubrication fluid pressure, the second lubrication pump operating in parallel with the first lubrication pump;
the high pressure lubrication circuit being fluidly coupled to supply at least some of the lubrication fluid to a plurality of sliding surfaces associated with a crankshaft at the first lubrication fluid pressure;
the low pressure lubrication circuit being fluidly coupled to supply at least some of the lubrication fluid to a plurality of rolling surfaces associated with a crankshaft at the second lubrication fluid pressure, the first lubrication fluid pressure being greater than the second lubrication fluid pressure; and
at least one check valve allowing circulation of the lubrication fluid at the second lubrication fluid pressure in the high pressure lubrication circuit while a reciprocating pump to which the dual circuit lubrication system is configured to be coupled is in neutral.
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Accused Products
Abstract
A dual circuit lubrication system for a power end of a reciprocating pump that includes a lubrication pump that supplies lubrication fluid to a high pressure lubrication circuit and a low pressure lubrication circuit. The high pressure lubrication circuit is fluidly coupled to a crankshaft to supply lubrication fluid to sliding surfaces associated with the crankshaft at a first lubrication fluid pressure. The crankshaft drives a crosshead coupled to a plunger to displace fluid from a fluid end of the reciprocating pump. The low pressure lubrication circuit is fluidly coupled to supply the lubrication fluid to a plurality of rolling surfaces associated with the crankshaft at a second lubrication fluid pressure. The first lubrication fluid pressure is greater than the second lubrication fluid pressure.
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Citations
26 Claims
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1. A dual circuit lubrication system for a power end of a reciprocating pump, comprising:
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a first lubrication pump supplying a lubrication fluid to a high pressure lubrication circuit at a first lubrication fluid pressure; a second lubrication pump supplying the lubrication fluid to a low pressure lubrication circuit at a second lubrication fluid pressure, the second lubrication pump operating in parallel with the first lubrication pump; the high pressure lubrication circuit being fluidly coupled to supply at least some of the lubrication fluid to a plurality of sliding surfaces associated with a crankshaft at the first lubrication fluid pressure; the low pressure lubrication circuit being fluidly coupled to supply at least some of the lubrication fluid to a plurality of rolling surfaces associated with a crankshaft at the second lubrication fluid pressure, the first lubrication fluid pressure being greater than the second lubrication fluid pressure; and at least one check valve allowing circulation of the lubrication fluid at the second lubrication fluid pressure in the high pressure lubrication circuit while a reciprocating pump to which the dual circuit lubrication system is configured to be coupled is in neutral. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20)
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15. A reciprocating pump with a dual circuit lubrication system, comprising:
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a fluid end coupled to a power end, the fluid end configured to supply fluid at a high pressure into a wellbore; a first lubrication pump of a high pressure lubrication circuit supplying a lubrication fluid to the power end; a second lubrication pump of a low pressure lubrication circuit supplying lubrication fluid to the power end, a first lubrication fluid pressure of the high pressure lubrication circuit being higher than a second lubrication fluid pressure of the low pressure lubrication circuit, the first and second lubrication pumps operating in parallel; and at least one pressure control valve configured to maintain at least one of the lubrication fluid in the low pressure lubrication circuit at the second lubrication fluid pressure and the lubrication fluid in the high pressure lubrication circuit at the first lubrication fluid pressure.
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21. A reciprocating pump with a dual circuit lubrication system, comprising:
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a fluid end coupled to a power end, the fluid end configured to supply fluid at a high pressure into a wellbore; a first lubrication pump of a high pressure lubrication circuit supplying a lubrication fluid to the power end; a second lubrication pump of a low pressure lubrication circuit supplying lubrication fluid to the power end, a first lubrication fluid pressure of the high pressure lubrication circuit being higher than a second lubrication fluid pressure of the low pressure lubrication circuit, the first and second lubrication pumps operating in parallel; and at least one check valve allowing recirculation of the lubrication fluid at the second lubrication fluid pressure in the low pressure lubrication circuit and the high pressure lubrication circuit while the reciprocating pump is in neutral, and allowing recirculation of the lubrication fluid at the second lubrication fluid pressure in the low pressure lubrication circuit and recirculation of the lubrication fluid at the first lubrication fluid pressure in the high pressure lubrication circuit when the reciprocating pump is pumping. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification