The 400 pump is used in all phases of oilfield operation to pump water, cement, fracturing fluids, and other stimulation fluids. The three main parts of pump are (1)the power end, (2)the spacer, and (3)the fluid end
Power End
The power-end assembly reduces speed, multiplies torque, and changes rotary action into reciprocating action. It takes energy delivered by the engine and transmission and changes it into energy that can be used by the fluid end. Power ends are customized to meet job requirements and conserve space on the trailer or truck unit. Cases are available in right- and left-hand versions. We use Holroyd gear sets (8.6:1) for 400 pump. Other customizing features include the following:
- lube systems
- companion flanges
- worm- and ring-gear ratios
- heat exchanger design
Spacer
On most pump configurations, a steel spacer assembly is used between the fluid end and the power end. The spacer helps prevent fluids from escaping from the fluid end into the power-end cavity (sump). All new pumps require spacers. Fracturing pumps require L-2 spacers and 4 cement pumps require L-4 spacers. Some spacers require push-rod noses uniquely designed to match the fluid-end size used, while other spacers may use more than one type of wiper gland.
Fluid End
The fluid end uses energy that has been modified by the power end to move cement, fracturing mediums, and other liquids and materials. The 400 pump fluid end, which is available in two sizes, can be customized for many applications. The fluid end accepts a variety of discharge flanges and plunger lubricators. Different lengths of plungers and tie bolts are used. A variety of valve and seat combinations are available, and different springs and inserts can be installed on these valves.