Detachable pre-tightening mud pump piston and disassembling method thereof

Abstract

The invention provides a detachable pre-tightening mud pump piston and a disassembling method thereof. The detachable pre-tightening mud pump piston comprises a piston rod, a piston head and a seal assembly, wherein the piston head sleeves the outer wall of the piston rod; the seal assembly comprises a seal rubber cylinder, a clamp ring and a mud-scraping ring; the clamp ring and the mud-scraping ring separately sleeve the external part of the piston head and an accommodating space is formed between the clamp ring and the mud-scraping ring, and the seal rubber cylinder sleeves the external part of the piston head and is positioned in the accommodating space; a detaching screw hole is further formed on the piston head, and the forming direction of the detaching screw hole is parallel to the axial direction of the mud-scraping ring. The piston rod, the piston head and the seal assembly provided by the invention are arranged in a matched manner, so that not only is the sealing property of the piston guaranteed, but also a detaching piece is screwed through the detaching screw hole to quickly separate the seal assembly from the piston head by matching the arranging position of each part in the seal assembly with the position of the detaching screw hole formed on the piston head, and therefore, the detaching time is shortened.

Description

technical field [0001] The invention belongs to the field of drilling exploration, and in particular relates to a detachable and replaceable pre-tightened mud pump piston. Background technique [0002] At present, the pistons of drilling mud pumps need to be replaced with sealing rubber cartridges after being used for a certain period of time. In the process of use, the rubber tube is repeatedly squeezed, and the form of its cooperation with the piston head changes from a clearance fit or a small interference fit during installation to an interference fit. It is very inconvenient when changing the rubber cartridge, which greatly increases the replacement time. In particular, the piston that adopts the vulcanized rubber process needs to replace the piston assembly as a whole, resulting in a large increase in cost. In addition, after a period of use, the ordinary piston sealing rubber cylinder cannot be in good contact with the cylinder liner due to surface wear, and loses t...

AI Technical Summary

Problems solved by technology

It is very inconvenient to replace the rubber cartridge, which greatly increases the replacement time

In particular, pistons using vulcanized rubber technology need to replace the piston assembly as a whole, resulting in a large increase in cost

In addition, after being used for a period of time, the ordinary piston sealant can not be in good contact with the cylinder liner due to surface wear, and the sealing effect will be lost.

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