Integrated pumping and pumping combined operation under-pressure rotary pumping pipe column and plugging tool and method

Abstract

The invention discloses an integrated pumping and pumping combined operation under-pressure rotary pumping pipe column and a plugging tool and method. The pipe column comprises an oil well pump, a packer and a measure tool which are connected to an oil pipe and jointly form a measure pipe column, wherein the packer is located above the measure tool, the oil well pump is located above the packer, the pipe column further comprises a preset working barrel, a plugging tool and an ejector rod, wherein the preset working barrel is connected to the oil pipe, the preset working barrel is located below the oil well pump, the plugging tool is mounted in the preset working barrel, the upper end of the ejector rod is fixedly connected with an oil well pump inner barrel of the oil well pump, the lower end of the ejector rod corresponds to the upper end of the plugging tool, and the plugging tool is controlled to be switched on and off in a triggering mode. According to the pipe column, the plugging tool is tripped into a blowout prevention pipe connected with a wellhead, and can be opened when tripped into an inner cylinder of an oil well pump, so that the plugging tool is simple, convenient, safe and reliable; and when the sucker rod is lifted out, the pipe column is automatically sealed, and next operation construction is facilitated.

Description

technical field [0001] The invention relates to the technical field of oil field oil well rotary pumping string plugging under pressure, in particular to an integrated pumping combined with pumping string under pressure and a plugging tool and method. Background technique [0002] With the deepening of oilfield development, many oil wells need to carry out measures to improve the oil recovery rate. Since the oil wells need to be put into normal production after the measures, it is necessary to pull out the measure string and re-run the pumping string. In order to reduce the number of tubing trips, the oil field has formed a multi-functional integrated pumping and pumping string after years of research and research, which can respectively realize fracturing, perforation, acidizing, testing and pumping strings. , It can be pumped directly into the oil pump and sucker rod for pumping production, no need to lift out the measure string, which greatly shortens the construction tim...

AI Technical Summary

Problems solved by technology

With the reduction of oil layer pressure, after the wellhead pressure drops to a certain pressure, the production of the oil well will not meet the production ratio requirements. Since the tubing string in the well is connected with the oil layer, the pressure in the tubing string cannot be effectively controlled, resulting in the inability of the sucker rod to be lowered.

At present, there are usually two ways to lower the sucker rod for pumping. One is to kill the well and balance the pressure in the well. This method will cause damage to the oil layer and affect the productivity of the oil well; the second is to wait until the oil layer has no self-spraying ability. Lowering the sucker rod, which greatly prolongs the waiting time for pumping, reduces the production of the oil well, and increases the operating cost

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