Whole-well-segment pressurized construction device and construction technology with device

Abstract

The invention discloses a whole-well-segment pressurized construction device and a construction technology with the device. The device comprises an auxiliary function assembly, a main function assembly and a traveling function assembly successively from bottom to top, the traveling function assembly is connected with a power lifting device which has pressurized lifting function and used to lift orlay down the traveling function assembly, the traveling function assembly and the main function assembly are sealed reliably, the main function assembly is in sealing connection with the auxiliary function assembly, and the lower end of the auxiliary function assembly is in sealing connection with a well head via a cross unit in the well head.

Description

technical field [0001] The invention relates to a pressurized construction operation device for oil, gas and water wells in an oil field and a construction technology using the device, which is mainly used for later maintenance and repair when the oil and gas water wells in the oil field are under pressure. Background technique [0002] In the production process of oil and gas fields, oil and gas wells need to be regularly inspected and maintained. For the maintenance of pressured oil and gas wells, two solutions are generally adopted: one is to use well killing hydraulic wells, but after killing the wells, the oil and gas pipelines in the wells will be blocked , although the oil and gas wells will be overhauled, the production of the well will be greatly affected after the overhaul, and this construction process has been gradually eliminated; the other is the underpressure overhaul operation, and the basic process is to plug the production string with the plug The inner c...

AI Technical Summary

Problems solved by technology

[0002] In the production process of oil and gas fields, oil and gas wells need to be regularly inspected and maintained. For the maintenance of pressured oil and gas wells, two solutions are generally adopted: one is to use well killing hydraulic wells, but after killing the wells, the oil and gas pipelines in the wells will be blocked , although the oil and gas wells will be overhauled, the production of the well will be greatly affected after the overhaul, and this construction process has been gradually eliminated; the other is the underpressure overhaul operation, and the basic process is to plug the production string with the plug The inner channel is sealed by the blowout preventer combination to seal the annular space of the oil jacket, and the maintenance is completed on the construction equipment equipped with the function of pressurization and lifting. plugging, but the actual production string is generally equipped with various downhole tools, and the downhole tools basically have diameter shrinkage, so it is basically difficult to achieve effective plugging of the last string. There are safety and environmental pollution problems when the plug is used for secondary plugging or spraying and spraying construction, so it is generally only used in water wells. For oil and gas wells, this construction process cannot meet the site construction requirements

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