Abstract: A monitoring system for a hydraulic fracturing pump may include a sensor configured to output a signal based on measurements of a fluid parameter relating to the hydraulic fracturing pump, where the signal has a fixed relationship to a measurement scale. The monitoring system may include a first data receiver and a second data receiver configured to derive the measurements of the fluid parameter using the measurement scale. The monitoring system may include a signal distribution device, without external power, coupled to the sensor, the first data receiver, and the second data receiver. The signal distribution device may be configured to distribute respective input signals to the first data receiver and to the second data receiver, where the respective input signals are based on the signal and have the fixed relationship to the measurement scale.

Abstract: A hydraulic fracturing pump system may include a hydraulic fracturing pump including a fluid end and a power end, a fluid end controller, mounted to the fluid end, storing a fluid end identifier that uniquely identifies the fluid end, a sensor configured to measure a parameter relating to the hydraulic fracturing pump, and a primary controller communicatively coupled to the sensor and to the fluid end controller. The primary controller may be configured to receive the fluid end identifier from the fluid end controller, obtain measurements from the sensor, generate a report that indicates data based on the measurements, and transmit the report to the fluid end controller.

Abstract: A suction valve control system of a fluid pump, that is configured to discharge fluid during a plurality of discharge cycles, may include a plurality of suction valves for respective cylinders of a fluid end of the fluid pump. The plurality of suction valves may be configured to close during the plurality of discharge cycles in accordance with a normal operation of the plurality of suction valves. The suction valve control system may include a controller configured to cause, responsive to a deactivating event for a cylinder of the respective cylinders, a suction valve of the cylinder to be maintained in an open position throughout one or more discharge cycles of the plurality of discharge cycles, while at least one other suction valve of the plurality of suction valves has the normal operation during the one or more discharge cycles.

Abstract: A monitoring system for a hydraulic fracturing pump may include a sensor configured to output a signal based on measurements of a fluid parameter relating to the hydraulic fracturing pump, where the signal has a fixed relationship to a measurement scale. The monitoring system may include a first data receiver and a second data receiver configured to derive the measurements of the fluid parameter using the measurement scale. The monitoring system may include a signal distribution device, without external power, coupled to the sensor, the first data receiver, and the second data receiver. The signal distribution device may be configured to distribute respective input signals to the first data receiver and to the second data receiver, where the respective input signals are based on the signal and have the fixed relationship to the measurement scale.

Abstract: A system for distributing a fluid flow across multiple inlet passages of a reciprocating pump includes an auger configured to be positioned into a suction manifold fluidly coupled with the multiple inlet passages of the reciprocating pump. The auger defines an axis, a first axial end, a second axial end, and a helical body extending between the first axial end and the second axial end. The auger is receivable into the suction manifold such that the first axial end is positioned to receive the fluid flow and force the fluid to move along a helical path defined by the helical body to introduce an angular momentum into the fluid flow. The system includes an end flange fixedly coupled to the second axial end proximate the opening. The system further includes a clamp arrangement for the auger wherein the clamp arrangement is movable between a clamped state and an unclamped state.

Abstract: A controller may monitor an operating parameter relating to at least one of a fluid pump or a prime mover for the fluid pump. The fluid pump may be configured to discharge fluid during a plurality of discharge cycles. The fluid pump may have a suction valve configured to close during the plurality of discharge cycles. The controller may cause, responsive to the operating parameter indicating that the fluid pump is to be deactivated, the suction valve to be maintained in an open position throughout one or more discharge cycles of the plurality of discharge cycles.

Abstract: A controller of a suction valve control system may receive an initiation indication indicating an initiation of a prime mover for a fluid pump. The fluid pump may have a plurality of suction valves, and a plurality of valve control components may be configured to control actuation of the plurality of suction valves. The controller may cause, responsive to the initiation of the prime mover, the plurality of valve control components to maintain the plurality of suction valves in open positions during one or more discharge cycles of the fluid pump.

Abstract: A valve system is disclosed for controlling fluid flow into or out of a fluid chamber of a fluid end of a hydraulic fracturing pump, the fluid flow to be caused by a reciprocating plunger that is driven by a power end of the hydraulic fracturing pump. The valve system may include a valve seat defining multiple bores in parallel and multiple valves configured to sealingly engage the valve seat at respective bores of the multiple bores.

Abstract: A fluid pump may include a fluid chamber, a plunger configured to reciprocate within the fluid chamber, and a valve system including multiple valves. The multiple valves each may be configured to control fluid flow into the fluid chamber or each may be configured to control fluid flow out from the fluid chamber.

Abstract: A fluid pump may include a fluid chamber, a plunger configured to reciprocate within the fluid chamber, and a valve system including multiple valves. The multiple valves each may be configured to control fluid flow into the fluid chamber or each may be configured to control fluid flow out from the fluid chamber.

Abstract: A process for disrupting filter cake in an underground formation, which process comprises: (i) incorporating into a treatment fluid a solid polymer capable of being converted by hydrolysis into one or more organic acids; (ii) introducing the treatment fluid into the underground formation; and (iii) allowing the solid polymer to hydrolyse in the presence of water to produce organic acid such that acid soluble material within the filter cake or adjacent formation is dissolved.

Abstract: Compounds of the formula I, II or III: or pharmaceutically acceptable salts thereof, wherein m, n, q, Ar, R1, R2, R3, R4 and R5 are as defined herein. Also provided are methods for preparing, compositions comprising, and methods for using compounds of formulas I-III.

Abstract: A method and system for reducing pulsation in lateral piping associated with a gas compressor system. A tunable side branch absorber (TSBA) is installed on the lateral piping. A pulsation sensor is placed in the lateral piping, to measure pulsation within the piping. The sensor output signals are delivered to a controller, which controls actuators that change the acoustic dimensions of the SBA.

Abstract: Compounds of the formula I: or pharmaceutically acceptable salts thereof, wherein m, q, Ar, R1, R2 and R7 are as defined herein. Also provided are methods for preparing, compositions comprising, and methods for using compounds of formula I.

Abstract: A process for producing a self-disrupting filter cake in an underground formation, which process comprises: (a) incorporating into a drilling fluid a solid polymer capable of being converted by hydrolysis into one or more organic acids; (b) using the drilling fluid to drill a wellbore into the underground formation such that the solid polymer in the drilling fluid contributes to the formation of a filter cake; and (c) allowing the solid polymer to hydrolyse in the presence of water and to disrupt the integrity of the filter cake. A drilling fluid which contains as a bridging agent one or more solid polymers capable of being converted by hydrolysis into one or more organic acids is also provided.

Abstract: An apparatus and method for monitoring a reciprocating member of a reciprocating piston compressor is presented. The apparatus and method provide a means for measuring parameters of the reciprocating member, such as road load or cross-head temperature and the like, and wirelessly transmitting the data to a receiver. A mobile assembly is attached to a reciprocating member of the compressor, the mobile assembly having a sensor assembly, a wireless transmitter and a power generation assembly. The sensor assembly measures a parameter of the reciprocating member and generates a representative sensor signal. The wireless transmitter wirelessly transmits a corresponding data signal to a stationary assembly mounted nearby. The power assembly powers the transmitter and sensor assembly. The measured data is used, in conjunction with other measurements, such as a crankshaft encoder, to calculate the work performed by the compressor, the power used by the compressor and other information.

Abstract: A method of improving scavenging operation of a two-stroke internal combustion engine. The exhaust pressure of the engine is analyzed to determine if there is a pulsation frequency. Acoustic modeling is used to design an absorber. An appropriately designed side branch absorber may be attached to the exhaust manifold.

Abstract: The invention provides compounds of the Formula I: and pharmaceutically acceptable salts thereof, wherein m, Ar, R1, R2, and R3 are as defined herein. The invention also provides methods for preparing, compositions comprising, and methods for using compounds of Formula I.

Abstract: This invention relates to compounds which are generally muscarinic M2/M3 receptor antagonists and which are represented by Formula I: wherein X, Y, and Z are O, S or NR5, and the other substituents are as defined in the specification; and prodrugs, individual isomers, racemic or non-racemic mixtures of isomers, and pharmaceutically acceptable salts or solvates thereof. The invention further relates to pharmaceutical compositions containing such compounds and methods for their use as therapeutic agents.

Abstract: Compounds of the formula I: or pharmaceutically acceptable salts thereof, wherein m, p, q, Ar, R1 and R2 are as defined herein. Also provided are methods for preparing, compositions comprising, and methods for using compounds of formula I.