Hollow rod water mixing wellhead device

Abstract

A hollow rod water-mixed wellhead device, the thread on the upper part of the sealing pipe is connected with the small thread inside the pressure relief joint, the large thread inside the pressure relief joint is connected with the water-mixed tee, the water-mixed tee is connected with the oil outlet tee, and the oil outlet tee is connected with the oil outlet tee. The flange cover is connected by upper and lower clamps, the flange cover and the wellhead cross are connected by bolts, the pressure isolation pump barrel is connected with the internal thread of the water-mixed tee, the suspension sealing joint is suspended in the wellhead cross, and the lower part of the suspension sealing joint is connected with the wellhead cross. The oil extraction pipe is connected, the polished rod passes through the sealing pipe, the lower part of the polished rod is connected with the Unicom joint, the lower part of the Unicom joint is connected with the pressure isolation plunger, the pressure isolation plunger is in the pressure isolation pump barrel, and there is a pressure relief hole on the pressure relief joint. There is a water mixing port on the connection, an oil outlet on the oil outlet tee, a water mixing channel between the sealing tube and the pressure isolation pump barrel, an oil outlet channel between the oil suction pipe and the pressure isolation pump barrel, and the communication hole and the pressure isolation column Connect within Cyprus. No need for high-pressure hoses, high temperature resistance, high pressure resistance, suitable for mixing with steam, long service life, long-term normal production of pumping wells, and good economic benefits.

Description

1. Technical field [0001] The invention is a device for oil recovery in an oil field, which is a hollow rod water-mixed wellhead device. 2. Background technology [0002] In heavy oil wells and wax wells, some use hollow rods to pump oil by mixing water to reduce viscosity and remove wax. The principle of hollow rod water mixing is that heated water or steam enters the hollow rod from the wellhead high-pressure hose and mixes with the crude oil on the pump to heat and dilute the crude oil, so as to achieve the purpose of reducing viscosity and removing wax, so that the oil well can be produced normally. The high-pressure hose heating is to fix one end of the high-pressure hose on the ground, and connect the other end with the upper end of the moving hollow polished rod, so that the heated water or steam wellhead high-pressure hose enters the hollow rod. However, the high-pressure hose has poor heat resistance and is not suitable for heating by steam; the high-pressure hose ...

AI Technical Summary

Problems solved by technology

However, the high-pressure hose has poor heat resistance and is not suitable for heating by steam; the high-pressure hose has to be retracted and retracted with the rotation of the donkey head of the pumping unit, and the service life of the high-pressure hose is short; the destruction of

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