Plunger mud pump comprising split type plunger assemblies

Abstract

The invention discloses a plunger mud pump comprising split type plunger assemblies. The plunger mud pump comprises a fluid end and a power end. A plurality of fluid pumping systems are arranged between the fluid end and the power end. Each fluid pumping system comprises a valve box assembly, a pull rod mounting sleeve and a transmission assembly. The valve box assemblies are arranged at the fluidend. The pull rod mounting sleeves are arranged at the power end. Each transmission assembly comprises a pull rod, a pull rod sealing assembly, a plunger, one plunger sealing assembly and an adjustment connecting assembly. Each plunger sealing assembly comprises two first metal push sleeves and a first sealing body which are mounted between each plunger and the corresponding plunger mounting sleeve. Fluid inlets of the valve box assemblies are connected with a fluid inlet pipe. Fluid outlets of the valve box assemblies are connected with a fluid outlet pipe. The plunger mud pump can realize interchange of single fluid, double fluids and multiple fluids, can carry out mixing of fluid at different proportions and is stable in fluid pumping pressure and uniform in fluid mixing.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a plunger mud pump. Background technique [0002] Mud pump is a very important production equipment in the oil field industry and an important part of drilling equipment. It is mainly used for deep well and shallow well operations in oil fields. It can complete water blocking and oil displacement operations to oil wells, and can also be used for cement plugging during oil field workover. , channel sealing, well washing, sand washing and cementing operations, near and long-distance transportation of crude oil and pressure testing, etc. [0003] The plunger of the existing mud pump is made of metal materials. Because the plunger needs to move repeatedly and bear a certain high pressure, the plunger often adopts an integrated structure. Although this structure has good rigidity, pressure resistance and impact resistance, but During manufacture, the precision of the thread on the surf...

AI Technical Summary

Problems solved by technology

The plunger, sealing ring, liquid inlet valve and liquid outlet valve of the mud pump work under the conditions of high temperature, high pressure and high speed. The uneven pressure in the pump will cause the service life of these devices to be very short, and most of these parts are Metal material, the surface is easily corroded and worn, and must be replaced regularly, otherwise it is easy to leak and partially fail, causing safety hazards

Therefore, the operation and maintenance costs of the above types of pumps are high. Although people have thought of many ways, they have not been able to fundamentally solve the problem.

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