Fireflooding moving type high-temperature electric ignition process pipe

Abstract

The invention provides a fireflooding moving type high-temperature electric ignition process pipe. The pipe specifically comprises a casing pipe, an oil pipe, a heat insulation pipe and a packer, wherein the hot end of an igniter for fireflooding moving type high-temperature electric ignition is arranged in the heat insulation pipe, the oil pipe is connected with the top of the heat insulation pipe, a pipe body formed by the oil pipe and the heat insulation pipe in a combined mode is arranged in the casing pipe, and the packer is connected with the bottom of the heat insulation pipe and used for separating the pipe body formed by the oil pipe and the heat insulation pipe in the combined mode from the casing pipe. Due to the process pipe, the heat insulation effect can be effectively achieved, heat consumption is reduced and the casing pipe is protected; the process pipe plays a gas separation effect in a normal gas injection stage, and oxidation corrosion of oxygen to the pipe is also prevented; meanwhile, a channel is provided for a temperature measurement signal cable, an oil layer can be ignited at high temperature fast, the oil casing pipe is not damaged, and ignition operation can be safer, faster and more reliable.

Description

technical field [0001] The invention relates to the field of heavy oil development, in particular to a process string capable of realizing high-temperature ignition of a fire-driven mobile electric igniter. Background technique [0002] Liaohe Oilfield is the largest heavy oil production base in my country, and the heavy oil production accounts for about 60% of the total production. At present, most of the blocks are in the later stage of steam injection development, and the development difficulty is increasing. It is a practical way to use fire flooding as its replacement development method. The key to the successful development of fire flooding is the ignition of oil layers, and the high temperature ignition of oil layers and the high temperature oxidation of heavy oil layers are the guarantees for enhanced oil recovery. [0003] At present, the commonly used ignition methods at home and abroad are mainly divided into two categories: chemical injection ignition and electric...

AI Technical Summary

Problems solved by technology

[0004] The bundled igniter uses the oil pipe string to lower the igniter into the target layer, and its power cable is tied to the oil pipe to connect with the ground control cabinet. Since the gas injection pipe string cannot be released during the entire production cycle, after the end of the production cycle, the electric The igniter and power cable are burnt and cannot be reused, resulting in an increase in the production cost of a single well. There are many related patents and documents on the bundled electric igniter, so I won’t repeat them here

Chinese patent 201110326453.X introduces a removable electric igniter, which realizes the reuse of the igniter, but because the igniter and the power cable are not equal in diameter, during the production process of uninterrupted gas injection, when the wellhead is lifted and lowered Difficult and less secure

Chinese patent 201320112187.5 introduces a retractable electric ignition and monitoring system for fire-burning oil layer. The igniter has an equal-diameter structure and can be used repeatedly. However, the size of the mobile electric igniter limits its column structure to achieve high temperature There is still some difficulty in igniting the fire

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