Offshore platform thermal recovery fuel oil or fuel gas steam injection boiler

Abstract

The invention relates to an offshore platform thermal recovery fuel oil or fuel gas steam injection boiler used in the thermal recovery operation of an offshore oilfield platform. The invention mainly solves the problems that land petroleum thermal recovery devices can not meets the demands of the offshore platform on devices such as compact layout, light weight, safety, mental protection, high efficiency and high degree of automation. The boiler mainly comprises a boiler main body and auxiliary equipment, wherein the main body mainly contains a radiant section, a convection section and a water heat exchanger; and the auxiliary equipment mainly contains a steam-water system, a ventilation system, a combustion system and an automatic control system. All the parts of the boiler main body are assembled in the vertical mode and all the water channels and tube bundles in the boiler main body are arranged in a vertical structure and use the high-strength tubing with small wall thickness, thus the floor space of the boiler of the invention can be reduced by about one third and the weight can be reduced by about 20% compared with the conventional boiler used on land; the special insulating layer and insulating material are adopted simultaneously so that the economic and technical norms of the boiler such as heat efficiency, dryness, safety and environmental protection are all higher than the existing norms of the land boiler; and the boiler is combined with the automatic control system so that the boiler is safe, environmentally friendly and efficient, and has high degree of automation.

Description

Technical field: [0001] The invention relates to a steam injection boiler used for thermal recovery of heavy oil and super heavy oil underground during crude oil exploitation, in particular to a thermal recovery oil fuel oil or gas steam injection boiler for offshore oil field platform thermal recovery operations. Background technique: [0002] In the exploitation of crude oil in the oil field, in order to increase the output of underground heavy oil and super heavy oil, firstly reduce the viscosity of heavy oil and improve the fluidity of crude oil. One of the means is to use steam injection boilers. The produced high-temperature and high-pressure wet steam is injected into the oil layer at the bottom of the well to heat the crude oil in the oil layer to reduce the viscosity of the heavy oil, thereby increasing the fluidity of the heavy oil and greatly improving the recovery factor. With the continuous deepening of oilfield development, as the main replacement block of prod...

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Problems solved by technology

At present, the conventional thermal recovery boilers used on land adopt the form of horizontal direct flow, the cylinder body of the radiation section is a horizontal cylinder, and the tube bundles of the radiation section adopt a horizontal reciprocating arrangement; the tube bundles of the convection section are a combination of finned tubes and seamless steel pipes. Horizontal reciprocating structure, such as attached figure 1 As shown, the boiler insulation is composed of traditional refractory materials and insulation materials. Due to the large area and the traditional insulation methods, it cannot meet the needs of oil exploitation on offshore platforms.

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