Oil well pump fuel charging valve capable of transmitting pressure

Abstract

The invention discloses an oil well pump fuel charging valve capable of transmitting pressure. The lower part of a suspension joint is connected with the upper part of a valve bank; the lower part of the valve bank is connected with an inner sealing body; the lower part of an outer pipe is an outer sealing body; the cylindrical surface or conical surface of the inner sealing body is designed to be in interference fit with a cylindrical hole or conical hole of the outer sealing body; the upper part of the suspension joint is milled into bars; the suspension joint is hung on the outer pipe; the suspension surface of the suspension joint is an outer conical surface; the suspension surface on the outer pipe is an inner cylindrical surface; the outer conical surface and the inner conical surface have the same taper; the outer conical surface is hung on the inner conical surface; and a releasing sleeve is arranged in an inner hole at the upper end of the suspension joint and is fixed on the suspension joint through a pin or is supported on the suspension joint through a spring. The releasing sleeve can prevent each bar on the upper part of the suspension joint from withdrawing inwards in the descending process, the fuel charging valve is reliable in suspension; and the suspension surface of the suspension joint is the conical surface, so the suspension joint is easy to release. Therefore, the fuel charging valve works reliably and has remarkable economic benefits.

Description

1. Technical field [0001] The invention belongs to equipment on an oil well pump in an oil field, and relates to an oil inlet valve capable of transmitting pressure. 2. Background technology [0002] The commonly used oil well pump inlet valve cannot inject liquid into the well from the oil pipe on the pump after it goes down the well, and cannot be used for oil wells that need to inject liquid into the well. Chinese patent application 02254108.x "Injectable Oil Suction Pump Oil Inlet Valve" can inject liquid into the well, but there are two disadvantages: the one is only suitable for larger oil well pumps, if this equipment is installed on the small pump, due to its The valve ball is small, the flow channel is small, and the reliability is poor; the second is that there are many specifications, one pump diameter is matched with one specification, and it is troublesome to match. In the Chinese patent application 200810188495.x "Pressure-transmissible oil pump inlet valve", ...

AI Technical Summary

Problems solved by technology

[0002] The commonly used oil well pump inlet valve cannot inject liquid into the well from the oil pipe on the pump, and cannot be used for oil wells that need to inject liquid into the well

Chinese patent application 02254108.x "Injectable Oil Suction Pump Oil Inlet Valve" can inject liquid into the well, but there are two disadvantages: the one is only suitable for larger oil well pumps, if this equipment is installed on the small pump, due to its The valve ball is small, the flow channel is small, and the reliability is poor; the second is that there are many specifications, one pump diameter is matched with one specification, and the matching is troublesome

In the Chinese patent application 200810188495.x "Pressure-transmissible oil pump inlet valve", the suspension surface between the suspension joint and the outer pipe is a horizontal plane, and the inner conical hole of the release sleeve contacts the outer conical surface of the suspension joint to make the suspension joint Each body of the suspension joint is retracted and separated from the suspension with the outer tube 4. Through field tests, the rigidity of each strip body of the suspension joint must be increased if the suspension joint is to be reliably suspended. After the stiffness increases, the radial force and frictional force increase, and the suspension joint will hard to release

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