A pumping station for a pipeline, in particular an oil or gas pipeline, has a feed pump for delivering a fluid through the pipeline and a combustion engine for driving the feed pump. A hydrostatic system has a hydraulic motor for driving the combustion engine, in order to accelerate same to start-up. The hydraulic system also has a hydraulic pressure accumulator of limited volume which can be filled with a pressurized hydraulic medium to be admitted to the first hydraulic motor, thereby powering the latter. A pressure differential in the hydrostatic system prevailing over the hydraulic motor is variably adjustable, in order to accelerate the combustion engine to a predefined firing speed.

A culvert cleaner for cleaning clogged culverts using pressurized water having a self-contained water pump and maneuvering capabilities is described. The culvert cleaner includes a frame, a water pressurizing system, and a control system. The culvert cleaner may be used on a number of different machineries (e.g. truck, excavator, and rail equipment). The culvert cleaner is positioned in front of a clogged culvert using the hydraulic excavator that is on the railway. Once the culvert cleaner is position, the water pressurizing system of the culvert cleaner is engaged and high pressure water is used to clean the culvert. During cleaning alterations may be made to nozzle in the x-axis and y-axis due to the integrated positioning of the nozzle as a part of the water pressurizing system.

Embodiments relate to a hydraulic fracturing system that includes a blender unit. The system includes an auger and hopper assembly to receive proppant from a proppant source and feed the proppant to the blender unit for mixing with a fluid. A first power source is used to power the blender unit in order to mix the proppant with the fluid and prepare a fracturing slurry. A second power source independently powers the auger and hopper assembly in order to align the hopper of the auger and hopper assembly with a proppant feed from the proppant source. Thus, the auger and hopper assembly can be stowed or deployed without use of the first power source, which is the main power supply to the blender unit.

Embodiments relate to a hydraulic fracturing system that includes a blender unit. The system includes an auger and hopper assembly to receive proppant from a proppant source and feed the proppant to the blender unit for mixing with a fluid. A first power source is used to power the blender unit in order to mix the proppant with the fluid and prepare a fracturing slurry. A second power source independently powers the auger and hopper assembly in order to align the hopper of the auger and hopper assembly with a proppant feed from the proppant source. Thus, the auger and hopper assembly can be stowed or deployed without use of the first power source, which is the main power supply to the blender unit.

Described herein are embodiments of systems and methods for the removal of a direct drive unit (DDU) housed in an enclosure, such as a direct drive turbine (DDT) connected to a gearbox for driving a driveshaft connected to a pump for use in a hydraulic fracturing operations.

A fluid system includes a pumping flowline, wherein the pumping flowline is in selectable fluid communication with a production flowline, a cylinder including a first port and a second port, a piston slidably disposed in the cylinder, the piston sealing against an inner surface of the cylinder to form a first chamber and a second chamber, wherein the first chamber is in fluid communication with the first port and the second chamber is in fluid communication with the second port, and a first flowline in fluid communication with the first port of the cylinder and the pumping flowline, the first flowline including a first flowline valve, wherein, in response to opening the first flowline valve, the piston is displaced through the cylinder in a first direction to expand a volume of the first chamber of the cylinder.

A fluid system includes a pumping flowline, wherein the pumping flowline is in selectable fluid communication with a production flowline, a cylinder including a first port and a second port, a piston slidably disposed in the cylinder, the piston sealing against an inner surface of the cylinder to form a first chamber and a second chamber, wherein the first chamber is in fluid communication with the first port and the second chamber is in fluid communication with the second port, and a first flowline in fluid communication with the first port of the cylinder and the pumping flowline, the first flowline including a first flowline valve, wherein, in response to opening the first flowline valve, the piston is displaced through the cylinder in a first direction to expand a volume of the first chamber of the cylinder.

A method for evacuating a process space by initially evacuating the process space to a pressure limit value using two compressors operated in parallel, and on reaching or undershooting the pressure limit value, the process space is subsequently evacuated using the two compressors operated in series.

Provided is a safety valve (10) comprising a body (12) which defines an incoming fluid passage (14) and a return fluid passage (20). The incoming fluid passage (14) generally enables a fluid to pass from a fluid reservoir (18) through the body (12) to the tool head (16). The return fluid passage (20) generally enables a fluid to return from the tool head (16) through the body back to the fluid reservoir (18). The body (12) further comprises a diverter (22) which is displaceable between an active position and an inactive position. When the diverter (22) is in the active position, the diverter (22) redirects the fluid via a shunting passage (24) from the incoming fluid passage (14) to the return passage (20) to prevent operation of the tool head (16).

Provided is a pipe bend structure for reducing the load on the nozzle of a rotating device, including a pipe bend, a reinforcing rib and a reinforcing plate. The reinforcing plate is arranged on an outer surface of the pipe bend, and the reinforcing rib is arranged on an inner arc side of the outer surface of the pipe bend. In the structure, the arrangement of the reinforcing rib and the reinforcing plate on the pipe bend increases the strength of the pipe bend, so that the stress in the pipe bend resulting from a pipe connected thereto can be relieved, ensuring the stable and reliable operation of the rotating device.