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...

Examples

Embodiment 1

[0197] Example 1: Calculation of the height of the compensating bush

[0198] will be based on the basis of the present invention Figure 3a-Figure 3b The separating device is inserted into the borehole. At the location where the separation device is inserted, a temperature of 150° C. prevails. Steel L80 was used as material for the base pipe. Sintered silicon carbide (SSiC; 3M TM Type F silicon carbide, ESK Ceramics) was used as the material for the annular stack. In order to compensate for the different thermal expansions of the base pipe and the annular stack, compensating bushings of PTFE (polytetrafluoroethylene) are used at one or both ends of the annular stack. The PTFE compensating bushing has the effect of preventing a gap larger than the required filter width from forming between the annular disks at higher temperatures where it is inserted.

[0199] Height H of PTFE compensating bushing K Calculated according to the following formula

[0200] h K =ΔL / (α*ΔT...

Embodiment 2

[0207] Example 2: Calculation of the height of the compensating bush

[0208] According to the basis of the present invention Figure 3a-Figure 3b The separation device is used at a temperature of 200°C. The height of the ring stack is 1500mm. Steel 1.4563 ( Alloy 028) was used as material for the base tube. Sintered silicon carbide (SSiC; 3M TM Type F silicon carbide, ESK Ceramics) was used as the material for the annular stack. Thermal expansion coefficient α of the material used for the base pipe 钢 15.2*10 -6 / K; linear expansion ΔL of the base pipe in the temperature range from 20 to 200 °C 基管 (according to ΔL 基管 = L 基管 *α 钢 *ΔT) is 1500mm*15.2*10 -6 / K*180K, so 4.1mm. Thermal Expansion Coefficient α of SSiC Materials for Annular Stacks SSiC 2.8*10 -6 / K; linear expansion ΔL of an annular stack of silicon carbide in the temperature range from 20 to 200 °C 环形叠堆 (according to ΔL 环形叠堆 = L 环形叠堆 *α SSiC *ΔT) is 1500mm*2.8*10 -6 / K*180K, so 0.76mm. The dif...

Embodiment 9 to 14

[0217] Examples 9 to 14: Testing of Internal and External Voltage Resistance

[0218] In a hyperbaric chamber, tests of internal pressure resistance (burst pressure test), i.e., subjecting the separation device to internal pressure, and tests of external pressure resistance (collapse pressure test), i.e., subjecting the separation device to external pressure, are performed with The separation device according to the invention was carried out as well as with the reference separation device. The test setup and procedure corresponded to ISO 17824, first edition, 2009-08-15, setup and method shown in appendices A (collapse pressure test) and B (burst pressure test).

[0219] The inner diameter of the plenum chamber is 80mm and the usable length is 500mm. Through a pneumatically driven piston pump (GRACO X-treme Model 70, manufactured by Graco Inc., Russell J. Gray Technical Center, 88-11 Northeast Avenue, Minneapolis, MN 55413, USA Technical Center, 88-11th AvenueNortheast, Mi...

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...

Examples

Embodiment 1

[0197] Example 1: Calculation of the height of the compensating bush

[0198] will be based on the basis of the present invention Figure 3a-Figure 3b The separating device is inserted into the borehole. At the location where the separation device is inserted, a temperature of 150° C. prevails. Steel L80 was used as material for the base pipe. Sintered silicon carbide (SSiC; 3M TM Type F silicon carbide, ESK Ceramics) was used as the material for the annular stack. In order to compensate for the different thermal expansions of the base pipe and the annular stack, compensating bushings of PTFE (polytetrafluoroethylene) are used at one or both ends of the annular stack. The PTFE compensating bushing has the effect of preventing a gap larger than the required filter width from forming between the annular disks at higher temperatures where it is inserted.

[0199] Height H of PTFE compensating bushing K Calculated according to the following formula

[0200] h K =ΔL / (α*ΔT...

Embodiment 2

[0207] Example 2: Calculation of the height of the compensating bush

[0208] According to the basis of the present invention Figure 3a-Figure 3b The separation device is used at a temperature of 200°C. The height of the ring stack is 1500mm. Steel 1.4563 ( Alloy 028) was used as material for the base tube. Sintered silicon carbide (SSiC; 3M TM Type F silicon carbide, ESK Ceramics) was used as the material for the annular stack. Thermal expansion coefficient α of the material used for the base pipe 钢 15.2*10 -6 / K; linear expansion ΔL of the base pipe in the temperature range from 20 to 200 °C 基管 (according to ΔL 基管 = L 基管 *α 钢 *ΔT) is 1500mm*15.2*10 -6 / K*180K, so 4.1mm. Thermal Expansion Coefficient α of SSiC Materials for Annular Stacks SSiC 2.8*10 -6 / K; linear expansion ΔL of an annular stack of silicon carbide in the temperature range from 20 to 200 °C 环形叠堆 (according to ΔL 环形叠堆 = L 环形叠堆 *α SSiC *ΔT) is 1500mm*2.8*10 -6 / K*180K, so 0.76mm. The dif...

Embodiment 9 to 14

[0217] Examples 9 to 14: Testing of Internal and External Voltage Resistance

[0218] In a hyperbaric chamber, tests of internal pressure resistance (burst pressure test), i.e., subjecting the separation device to internal pressure, and tests of external pressure resistance (collapse pressure test), i.e., subjecting the separation device to external pressure, are performed with The separation device according to the invention was carried out as well as with the reference separation device. The test setup and procedure corresponded to ISO 17824, first edition, 2009-08-15, setup and method shown in appendices A (collapse pressure test) and B (burst pressure test).

[0219] The inner diameter of the plenum chamber is 80mm and the usable length is 500mm. Through a pneumatically driven piston pump (GRACO X-treme Model 70, manufactured by Graco Inc., Russell J. Gray Technical Center, 88-11 Northeast Avenue, Minneapolis, MN 55413, USA Technical Center, 88-11th AvenueNortheast, Mi...

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