Well drilling pump piston

Abstract

A piston for well-drilling pump is composed of main body, piston rod, sealing ring installed at front part of main body, the sealing ring positioned at the contact surface between main body and piston rod, and air blocking ring which is a V-shaped, trapezoidal or V-shaped rubber ring. Its advantages are no water hammer, and high sealing performance.

Description

technical field [0001] The invention belongs to a drilling pump piston used in oil exploration and drilling development, in particular to a single-acting mud pump piston. Background technique [0002] It is understood that the existing drilling pumps, such as the piston of the three-cylinder single-acting drilling mud pump, are mainly composed of a piston body, a piston rod, a rubber sealing ring and a rubber sealing ring. In the front section of the piston body, a rubber sealing ring is installed on the contact surface between the piston body and the piston rod. Since the seal between the piston and the cylinder liner is only realized by the rubber seal ring installed on the front part of the piston body, when the seal ring is deformed and a gap is formed between the cylinder liner, air will enter the cylinder liner, resulting in insufficient mud suction , resulting in water hammer. In order to prevent air from entering the cylinder liner, the ...

AI Technical Summary

Problems solved by technology

Since the seal between the piston and the cylinder liner is only realized by the rubber seal ring installed on the front part of the piston body, when the seal ring is deformed and a gap is formed between the cylinder liner, air will enter the cylinder liner, resulting in insufficient mud suction , resulting in water hammer

In order to prevent air from entering the cylinder liner, the measures taken in the prior art are to configure a spray pump to fill the gap between the rubber sealing ring and the cylinder liner with circulating water, but this measure cannot completely prevent air from entering the cylinder liner, so it cannot completely prevent air from entering the cylinder liner. To eliminate the occurrence of water hammer, in order to ensure the normal operation of the drilling mud pump, the measures taken in the prior art are to configure the mud injection pump

The rubber sealing ring installed on the front part of the piston body deforms more when the mud injection pump is not working properly, and the gap between it and the cylinder liner is also larger, resulting in more circulating water and the entrained sediment entering the cylinder. The sleeve not only produces water hammer, but also dilutes the mud, and the wear between the piston and the cylinder liner is accelerated, and the wear of the cylinder liner increases the gap between the piston and the cylinder liner, making the air, circulating water and sediment more Easy access to the cylinder liner, resulting in increasingly severe water hammer and wear of the cylinder liner, and may even cause a blowout

To sum up, the configuration of the spray pump and the mud injection pump cannot effectively solve the phenomenon of air entering the cylinder liner and the resulting water hammer. At the same time, it also accelerates the wear of the cylinder liner and increases the drilling cost

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