Split type oil pressure sealing piston mud pump convenient to disassemble

Abstract

The invention discloses a split type oil pressure sealing piston mud pump convenient to disassemble. The pump comprises a fluid end and a power end. A plurality of liquid pumping systems are arrangedbetween the hydraulic end and the power end; each liquid pumping system comprises a valve box assembly, a pull rod mounting sleeve and a transmission assembly; each valve box assembly is arranged at the hydraulic end, and each pull rod mounting sleeve is arranged at the power end; the transmission assembly comprises a pull rod, a pull rod sealing assembly, a piston rod, a piston, a connecting rodand a piston horizontal position fine-adjustment assembly; the piston horizontal position fine-adjustment assembly comprises a connecting rod end cover, two semi-circular-ring-cylinder-shaped metal inner clamping rings and two semi-circular-ring-cylinder-shaped elastic outer clamping rings; a liquid inlet of each valve box assembly is connected with a liquid inlet pipe; and a liquid outlet of eachvalve box assembly is connected with a liquid outlet pipe. According to the slurry pump, single-liquid, double-liquid and multi-liquid exchange can be achieved, different proportions of liquid can bemixed, the liquid pumping pressure is stable, and the liquid is uniformly mixed.

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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