RU62643U1 - HEATED PIPE - Google Patents

Abstract

The utility model relates to the oil industry, in particular to thermal oil production, but can be used in other sectors of the national economy for thermal insulation of pipelines. The objective of the invention is the provision of thermal insulation properties of the pipe while simplifying the design. The problem is solved through the use of pipes, where compositions with the content of hollow microspheres in the amount of 20-90% of the volume are used as thermal insulation.

Description

The proposed utility model is intended primarily for use in the oil industry and may find application in the construction and subsequent operation of oil and other wells in thermal methods.

Heat-insulated columns are known, including concentrically located sections of internal and external pipes with connection nodes, in the annular space of which heat-insulating material is placed, characterized by different versions of expansion joints for thermal expansion of pipe material (see AS No. 926224 of 12/10/1979, IPC: E 21 B 17/00, 36/00 and application for invention No. 200010145, dated January 17, 2000, IPC: E 21 B 17/00, publ. September 10, 2000)

However, the known structures do not have high thermophysical characteristics, which leads to a decrease in the temperature of the injected steam, an increase in the steam-oil ratio and a decrease in economic indicators.

Known heat-insulated pipe with screen-vacuum thermal insulation according to the patent of the Russian Federation No. 2243348 dated 03/20/03, IPC: E 21 17/00, F 16 L 59/065.

The disadvantage of this design is its complexity, the need to seal the annulus with the subsequent injection of inert gas under the design pressure, which prevents the flow of gases released from the pipe metal. The presence of internal and external pipes leads to an increase in weight and a limitation of the depth of descent, as a result of which thermal insulation and protection of the well structure at great depths are not ensured. High cost of running meter of pipe reduces profitability

application of thermal methods.

The objective of the utility model is to reduce the metal consumption, simplify the design and increase the reliability of thermally insulated pipes while maintaining the heat-shielding properties of the insulation.

To accomplish this task, a thermally insulated pipe was proposed, including thermal insulation, a new one in which the pipe is made of composite and layered materials, and hollow microspheres added to the binder in an amount of 20-90% of the volume are introduced as thermal insulation.

On figa, b, and c presents pipe diagrams.

Examples of specific performance.

The pipe, figure 1, a, of composite fibrous materials contains a binder of epoxy resins with the inclusion of hollow glass microspheres with a size of 25 μm in an amount of 20-90% of the volume, the expected thermal conductivity of 0.05-0.10 W / m ° C.

The pipe, figure 1, b, consists of a steel pipe 1, an insulating coating 2 based on epoxy resins with the inclusion of glass microspheres in an amount of 60% of the volume 4 mm thick, a protective coating in the form of a reflective screen made of aluminum foil 3.

The pipe, FIG. 1, c, consists of a steel pipe 1, a coating 2 of heat-resistant titanium paint of white color and acrylic paint with increased adhesive ability, with the inclusion of microspheres in an amount of 20-90% of the volume.

Claims (1)

A thermally insulated pipe, including thermal insulation, characterized in that the design uses a pipe made of composite and layered materials, and hollow microspheres added to the binder in an amount of 20-90% of the volume are introduced as thermal insulation.