A Compressed Air Distribution System (CADS) is provided in accordance with one embodiment, wherein the CADS includes at least one compressed air input port configured to receive compressed air, a liquid separator device, a filtration device, wherein the filtration device is in flow communication with the liquid separator device to receive dry compressed air and generate filtered dry compressed air, a lubricant introduction device to receive a portion of the filtered dry compressed air and generate lubricated compressed air, and at least one CADS output port, wherein the at least one CADS output port is communicated with at least one of the filtration device and the lubricant introduction device, wherein the at least one CADS output port is configured to controllably output at least one of the filtered dry compressed air and the lubricated compressed air.

A Compressed Air Distribution System (CADS) is provided in accordance with one embodiment, wherein the CADS includes at least one compressed air input port configured to receive compressed air, a liquid separator device, a filtration device, wherein the filtration device is in flow communication with the liquid separator device to receive dry compressed air and generate filtered dry compressed air, a lubricant introduction device to receive a portion of the filtered dry compressed air and generate lubricated compressed air, and at least one CADS output port, wherein the at least one CADS output port is communicated with at least one of the filtration device and the lubricant introduction device, wherein the at least one CADS output port is configured to controllably output at least one of the filtered dry compressed air and the lubricated compressed air.

Techniques for delivering lubricant to a packing assembly of a fluid end of a reciprocating pump include delivering lubricant to a stuffing box that is housing a packing assembly or to a manifold disposed in or around the stuffing box. The lubricant configured to decrease friction between an interior surface of the packing assembly and a reciprocating component moving along the interior surface. Prior to delivering the lubricant to the interior surface of the packing assembly, the lubricant is diverted to multiple radial flow paths circumferentially spaced around a bore in which the packing assembly is disposed. The multiple radial flow paths lead to the interior surface of the packing assembly and the lubricant flowing through the multiple radial flow paths is metered at different flow rates based on a friction gradient across the interior surface of the packing assembly.

Techniques for delivering lubricant to a packing assembly of a fluid end of a reciprocating pump include delivering lubricant to a stuffing box that is housing a packing assembly or to a manifold disposed in or around the stuffing box. The lubricant configured to decrease friction between an interior surface of the packing assembly and a reciprocating component moving along the interior surface. Prior to delivering the lubricant to the interior surface of the packing assembly, the lubricant is diverted to multiple radial flow paths circumferentially spaced around a bore in which the packing assembly is disposed. The multiple radial flow paths lead to the interior surface of the packing assembly and the lubricant flowing through the multiple radial flow paths is metered at different flow rates based on a friction gradient across the interior surface of the packing assembly.

An oil structure of an internal combustion engine includes a main oil pump configured to suck lubricating oil stored in a crankcase and feed the lubricating oil to respective engine parts and a scavenge pump configured to recover the lubricating oil from any lubricated engine part and return the lubricating oil into the crankcase. The scavenge pump has: an oil suction passage extending from the lubricated engine part to a suction side of the scavenge pump; and an air introduction passage for negative pressure control connected to the oil suction passage. An air introduction port of the air introduction passage is open to the inside of the crankcase and is set to a height position such that, when a level of the lubricating oil in the crankcase is inclined, the lubricating oil flows in from the air introduction port and returns from the scavenge pump into the crankcase.

An oil structure of an internal combustion engine includes a main oil pump configured to suck lubricating oil stored in a crankcase and feed the lubricating oil to respective engine parts and a scavenge pump configured to recover the lubricating oil from any lubricated engine part and return the lubricating oil into the crankcase. The scavenge pump has: an oil suction passage extending from the lubricated engine part to a suction side of the scavenge pump; and an air introduction passage for negative pressure control connected to the oil suction passage. An air introduction port of the air introduction passage is open to the inside of the crankcase and is set to a height position such that, when a level of the lubricating oil in the crankcase is inclined, the lubricating oil flows in from the air introduction port and returns from the scavenge pump into the crankcase.

An apparatus and system for applying lubricant to a rail road track having a control module, a housing, a lubricant distribution block, and a plurality of tubes for connecting the control module to the housing wherein the housing houses the lubricant distribution block. The control module is positionable in close proximity to the rail road track and the housing is positionable adjacent to and along a section of rail road track to be lubricated. The lubricant is stored in a vessel in the control module and pumped from the control module to a lubricant distribution nozzle connected to the housing and wherein sliding the lubricant distribution nozzle along the section of rail road track in a first direction distributes lubricant along the section of rail road track and then the block returns to a first position.

An apparatus and system for applying lubricant to a rail road track having a control module, a housing, a lubricant distribution block, and a plurality of tubes for connecting the control module to the housing wherein the housing houses the lubricant distribution block. The control module is positionable in close proximity to the rail road track and the housing is positionable adjacent to and along a section of rail road track to be lubricated. The lubricant is stored in a vessel in the control module and pumped from the control module to a lubricant distribution nozzle connected to the housing and wherein sliding the lubricant distribution nozzle along the section of rail road track in a first direction distributes lubricant along the section of rail road track and then the block returns to a first position.

A technique facilitates greasing of valves on a well tree, e.g. a frac tree, according to a simple process which enables selected, individual valves to be greased when desired. In some applications, the greasing process may be automated and controlled via a greasing control system. According to an embodiment, a greasing system is connected with grease ports at a plurality of actuatable valves located in a well tree. The greasing system has a plurality of grease valves which may be associated with each of the actuatable valves, e.g. with each of the grease ports. A pump is used to pump grease to the grease valves and the grease valves are selectively actuated to open positions to provide controlled greasing of desired actuatable valves so as to remove debris from and to lubricate selected actuatable valves.

A technique facilitates greasing of valves on a well tree, e.g. a frac tree, according to a simple process which enables selected, individual valves to be greased when desired. In some applications, the greasing process may be automated and controlled via a greasing control system. According to an embodiment, a greasing system is connected with grease ports at a plurality of actuatable valves located in a well tree. The greasing system has a plurality of grease valves which may be associated with each of the actuatable valves, e.g. with each of the grease ports. A pump is used to pump grease to the grease valves and the grease valves are selectively actuated to open positions to provide controlled greasing of desired actuatable valves so as to remove debris from and to lubricate selected actuatable valves.