Separating device for removing solid particles from liquid and gas flows for high differential pressures

Abstract

The subject matter of the invention is a separating device for removing solid particles from liquids and / or gases in extraction wells, comprising a) an annular stack (7) of at least three brittle-hard annular discs (8), the upper side (9) of the annular discs (8) having at least three spacers (10), which are distributed uniformly over the circular circumference of the discs and the contact area (11) of which is planar, so that the spacers (10) have planiform contact with the underside of an adjacent annular disc (8), and the annular discs (8) being stacked and fixed in such a way that between the individual discs (8) there is in each case a separating gap (14) for the removal of solid particles, and the axial projection of the annular discs (8) at the inner and the outer circumference being circular, and the brittle-hard material of the annular discs (8) being chosen from oxidic and non-oxidic ceramic materials, mixed ceramics of these materials, ceramic materials with the addition of secondary phases, mixed materials with fractions of ceramic or metallic hard materials and with a metallic binding phase, powder-metallurgical materials with hard material phases formed in situ and long- and / or short-fibre-reinforced ceramic materials, b) a perforated pipe (1), which is located inside the annular stack (7) and on which the brittle-hard annular discs (8) are stacked, c) at least three bands (15), which are provided axially parallel and uniformly spaced apart on the lateral surface (21) of the perforated pipe (1) located inside the annular stack (7) and onto which the annular discs (8) have been pushed, whereby the annular discs (8) are centred on the perforated pipe (1), and d) an end cap (5) at the upper end and an end cap (6) at the lower end of the annular stack (7), the end caps (5, 6) being firmly connected to the perforated pipe (1). The subject matter of the invention is likewise the use of a separating device according to the invention for removing solid particles from liquids and / or gases in a process for extracting liquids and / or gases from extraction wells

Description

technical field [0001] The invention relates to a novel separation device for high differential pressures, with which undesired solid particles can be separated from a volume flow of oil, gas and water or mixtures thereof. Background technique [0002] Such separation devices are required in many oil and gas extraction wells. Mineral oil and natural gas are stored in naturally occurring underground reservoirs, where the oil or gas is distributed in more or less porous and permeable mineral layers. The purpose of each oil or gas borehole is to reach the reservoir and produce it in such a way that as far as possible only marketable products such as oil and gas are extracted, while undesired by-products are minimized or even completely avoided. Undesirable by-products in oil and gas extraction include solid particles such as sand and other mineral particles that are carried up the borehole from the reservoir by liquid or gas streams. Depending on the permeability of the geolo...

AI Technical Summary

Problems solved by technology

However, forming the spacers as spherical segments has the disadvantage that ceramic materials with very good wear and erosion resistance, such as densely sintered silicon carbide, are sensitive to point pressure loads, Failure due to cracking when overstressed

This technical solution has disadvantages of the following degree: on the one hand the assembly is complex, because the precise orientation of the ring must be ensured; torsion under the influence of

This results in a lower load-carrying capacity of the filter system in terms of internal and external pressure

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