A hydraulically driven double-acting mud pump

Abstract

The invention discloses a hydraulically driven double-acting mud pump, which includes a power motor, a pressure oil pump, a three-position four-way hydraulic reversing valve, a hydraulic power end and a mud pump head. The power motor is traditionally connected to the pressure oil pump, and the pressure oil pump passes through a pipeline. It is connected to the P port of the three-position four-way hydraulic directional valve, the T port of the three-position four-way hydraulic directional valve is connected to the oil tank through the pipeline, and the A port and B port of the three-position four-way hydraulic directional valve are connected to the hydraulic power end , The hydraulic power end is traditionally connected to the mud pump head, the lower end of the mud pump head is connected to the low-pressure manifold, and the two sides of the mud pump head are respectively connected to the high-pressure manifold. The hydraulically driven double-acting mud pump of the present invention can make the instantaneous flow and pressure of the liquid discharged from the mud pump more stable and reduce fluctuations.

Description

Technical field [0001] The invention relates to the technical field of mud pumps, in particular to a hydraulically driven double-acting mud pump. Background technique [0002] Mud pump is an indispensable drilling equipment for geotechnical engineering construction such as geological survey and control, oil and gas field exploitation, and special drilling. It is used to transport mud or clean water to the drill pipe during the drilling process, mainly for cooling, flushing the drill bit and The role of soil. [0003] Most of the mud pumps currently in service are driven by a traditional mechanical crank-connecting rod mechanism for reciprocating motion, usually through a diesel engine or electric motor through a belt drive to reduce speed, a gear reducer to decelerate, and then through a crank-connecting rod mechanism and guide slider Drive the piston rod and the plunger of the mud pump head to perform reciprocating work to realize the suction and discharge functions of the mud pu...

AI Technical Summary

Problems solved by technology

Because the traditional mud pump adopts the crank connecting rod mechanism, the running speed of the plunger of the mud pump head changes approximately in a sinusoidal curve, so that the instantaneous flow rate and pressure of the discharge liquid also roughly change in a sinusoidal curve, with large fluctuations

In order to reduce the flow and pressure fluctuations in the discharge manifold of the mud pump head, the conventional technical solution is to install an air bag at the discharge port of the mud pump head, but this increases the weight of the equipment and the difficulty of maintenance

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