Abstract:
A valve device includes a body that defines a passage through which a fluid flows, a shaft that is movably supported with respect to the body and defines an axis, a valve element that is fixed to the shaft to open and close the passage; and a cylindrical bearing bush that movably supports the shaft with respect to the body, in which the bearing bush includes a mixed region in which a metal core material and expanded graphite are mixed with each other, and a first expanded graphite region made of only the expanded graphite such that the metal core material is not exposed in an inner circumferential side region in contact with an outer circumferential surface of the shaft.
Abstract:
A positive displacement pump is provided that includes a pump housing having a pump chamber; a plunger mounted in the pump housing for reciprocating motion in the pump chamber; a suction valve positioned to allow a fluid to enter the pump chamber upon movement of the plunger in a first direction; a discharge valve positioned to discharge the fluid from the pump chamber upon movement of the plunger in a second direction; and at least one sensor enclosed by the pump housing for measuring at least one pump condition parameter.
Abstract:
A reciprocating pump system is utilized. The system facilitates the prediction of failure modes due to degradation of pump components. A sensor system is used to monitor parameters indicative of abnormal events or wear occurring in specific components, such as pump valves. The indications of wear can be used to predict valve failure or other component failure within the reciprocating pump.
Abstract:
A reciprocating pump system is utilized. The system facilitates the prediction of failure modes due to degradation of pump components. A sensor system is used to monitor parameters indicative of abnormal events or wear occurring in specific components, such as pump valves. The indications of wear can be used to predict valve failure or other component failure within the reciprocating pump.
Abstract:
Detecting a failure mode of a fluid flow controller configured to control fluid flow between first and second chambers of a downhole positive displacement pump and a flow line, wherein the positive displacement pump comprises a piston moving in an axial reciprocating motion, and subsequently adjusting operation of the downhole positive displacement pump based on the detected failure mode such that the downhole positive displacement pump piston operates differently in different axial directions.
Abstract:
Verfahren zur Früherkennung von Ventilschäden in oszillierenden Verdrängerpumpen mit drei oder mehr Zylindern mit oder ohne gemeinsamen Pumpenkopf durch signalbasierte Auswertung gemessener Druck- und Körperschallsignale, Digitalisierung der Drucksignale Berechnung von Korrelationskoeffizienten mittels Kovarianzanalyse unter Verwendung des Verlaufs des Körperschalls an jedem Zylinder bei Abwesenheit eines gemeinsamen Pumpenkopf oder unter Verwendung fiktiver Schwingungsbeschleunigungssignale für jeden Zylinder und Zuordnung eines Ventilschadens zu einem Zylinder bei Anwesenheit eines gemeinsamen Pumpenkopfs sowie Auslösen eines Alarms bei Überschreitung und/oder Unterschreitung vorgegebener Schwellenwerte für die Korrelationskoeffizienten sowie oszillierende Verdrängerpumpen mit integrierten Sensoren zur Verwendung in diesen Verfahren.