Oil pressure sealing piston mud pump convenient for liquid mixing

Abstract

The invention discloses an oil pressure sealing piston mud pump convenient for liquid mixing, which comprises a hydraulic end and a power end, wherein a plurality of liquid pumping systems are arranged between the hydraulic end and the power end; each liquid pumping system comprises a valve box component, a pull rod mounting sleeve and a transmission component; the transmission component comprisesa pull rod, a pull rod sealing component, a piston rod, a piston and a piston horizontal position fine adjustment assembly; the pull rod is connected with the piston rod through the piston horizontalposition fine adjustment component; the piston horizontal position fine adjustment component comprises a piston rod end cover, two half circular ring cylinder-shaped metal inner snap rings and two half circular ring cylinder-shaped elastic outer snap rings; the liquid inlet of each valve box component is respectively connected with a liquid inlet pipe; a liquid outlet of each valve box componentis connected with the liquid outlet pipe. The mud pump disclosed by the invention can realize the interchange of single liquid, double liquid and multiple liquids, the mixing of the liquids in different proportions can be realized, pumping pressure of the liquid pumping pump is stable, and the liquid mixing is uniform.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a piston 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. In this process, it is often necessary to inject mixed mud solutions with different ratios. The existing multi-cylinder mud pumps have a stroke of It is fixed and does not adapt to the actual situation of different usage environments and different requirements for mud solution and mixing. [0003] The main cause of mud pump piston failure is piston w...

AI Technical Summary

Problems solved by technology

The wear of the piston leads to a decrease in the sealing performance of the piston, which makes it easier for the high-pressure mud to enter the piston mounting sleeve, and accelerates the wear and tear of the piston.

The wear of the piston is often due to the poor sealing performance of the wear-resistant layer in the piston and the piston installation sleeve, which reduces the friction and lubrication performance, resulting in the piston working under high friction conditions and becoming the most easily damaged part of the mud pump.

Pistons, sealing devices, liquid inlet valves, liquid outlet valves, etc. work under high temperature, high pressure, and high speed conditions. The uneven pressure in the pump will cause the service life of these devices to be very short, and most of these parts are made of metal. It is easy to be corroded and worn, and must be replaced regularly, otherwise it will easily leak and partially fail, causing safety hazards

In addition, when replacing a new piston or replacing the wear-resistant layer in the piston installation sleeve, it is often necessary to disassemble the piston installation sleeve, which requires a long time to stop the pump

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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