Steam flooding well production string and implementation method

Abstract

The invention discloses a steam flooding well production string and an implementation method. The steam flooding well production string comprises a sucker rod, an oil tube, a sleeve, an oil well pump, an overpressure restrictor valve, a safety joint, an insertion pipe bridge plug, a bottom valve, a tail pipe and a pipe plug. The steam flooding well production string is characterized in that the oil tube is in threaded connection with the oil well pump; the lower part of the oil well pump is in threaded connection with a plunger and penetrates into the oil well pump through the oil tube; the oil well pump is in threaded connection with the overpressure restrictor valve through an oil tube nipple; the overpressure restrictor valve is in threaded connection with the safety joint; the safety joint is in threaded connection with the insertion pipe bridge plug; the insertion pipe bridge plug is in threaded connection with the bottom valve through an outer pipe; the bottom valve is threaded connection with the tail pipe; and the lower end of the tail pipe is in threaded connection with the pipe plug. Casual stopping and casual operation of a steam flooding well are achieved, the production time efficiency of the well is improved and the problem of leakage of a kill fluid in the operation process is solved. The steam flooding well production string has the key technology that the steam flooding well production string is provided for achieving crude oil pumping production through structural design and processing of the overpressure restrictor valve, the insertion pipe bridge plug and the insertion pipe bottom valve.

Description

technical field [0001] The invention relates to a steam flooding well continuous production technology in the field of oil recovery technology, in particular to a steam flooding well production string and an implementation method. It is used for steam flooding wells to shut down and operate at any time and to prevent the loss of killing fluid during operation. Background technique [0002] The steam flooding in Gudao has 103 oil wells, 99 wells have been opened, the average daily fluid production per well is 24.8t / d, the daily oil is 3.8t / d, and the water cut is 84.6%. In the early stage of steam flooding, the formation energy is supplemented. Compared with before implementation: the dynamic liquid level rises, the submergence degree increases, the wellbore temperature rises, the viscosity decreases, and the production indicators of the oil well are improved. However, since the steam injection temperature is 330-350°C and the steam injection pressure is about 10MPa, the tem...

AI Technical Summary

Problems solved by technology

At present, the lifting method of the steam drive well in the oil production plant is the rod pump lifting. The main problems in the lifting are as follows: First, the production string cannot meet the continuous production requirements. low productivity

Second, during the operation process, the loss of well killing and flushing fluids is large, resulting in a rapid drop in well temperature, which affects the steam injection effect of steam flooding

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