CN-121976785-A - Combined gas well sand removal and filtration device

Abstract

The combined gas well sand removal and filtration device comprises a first filtration unit and a second filtration unit which are parallel, wherein the first filtration unit comprises a first valve, a first basket filter, a first tubular filter, a second tubular filter and a second valve which are sequentially connected in a pipeline mode from left to right, and the second filtration unit comprises a third valve, the second basket filter, the third tubular filter, the fourth tubular filter and the fourth valve which are sequentially connected in a pipeline mode from left to right. The filter combination of the double loops is adopted to carry out multistage filtration on underground impurities produced in the later period of the natural gas well, including stratum sand, filling sand, solid particles, organic matters, colloid asphaltene and foam discharging agent, so as to realize omnibearing blocking and interception, ensure the normal operation of the invention, and the first filter unit and the second filter unit continuously and alternately operate, ensure the continuous production of the natural gas well and improve the production efficiency of the gas well.

Inventors

• DENG MIN
• LIU GUANGYI

Assignees

• 北京水木一林石油天然气技术服务有限公司

Dates

Publication Date

20260505

Application Date

20260318

Claims (2)

1. 1. The combined gas well sand removal and filtration device is characterized by comprising two parallel filtration units, wherein the first filtration unit comprises a first valve (1), a first basket filter (2), a first tubular filter (3), a second tubular filter (4) and a second valve (5), and the second filtration unit comprises a third valve (6), a second basket filter (7), a third tubular filter (8), a fourth tubular filter (9) and a fourth valve (10); The first valve (1), the first basket filter (2), the first tubular filter (3), the second tubular filter (4) and the second valve (5) are sequentially connected in a pipeline from left to right; The third valve (6), the second basket filter (7), the third tubular filter (8), the fourth tubular filter (9) and the fourth valve (10) are sequentially connected in a pipeline from left to right; filter screens capable of filtering out larger particles, including but not limited to one or more of a back-wound wire screen, a self-cleaning screen; filter screens within which smaller particulate impurities may be filtered off, including but not limited to one or more of a back-wound wire screen, a self-cleaning wire screen; Filter screens within the second tube filter (4), the fourth tube filter (9) that can be installed to filter out fine particulate impurities include, but are not limited to, one or more of a back-wound wire screen cylinder, a self-cleaning wound wire cylinder, a self-cleaning screen cylinder.
2. 2. The sand removal and filtration device for combined gas well according to claim 1, wherein pressure gauges are arranged on the first tubular filter (3), the second tubular filter (4), the third tubular filter (8) and the fourth tubular filter (9).

Description

Combined gas well sand removal and filtration device Technical Field The invention belongs to the technical field of gas well output filtering, and particularly relates to a combined gas well sand removal and filtering device. Background In the development process of natural gas wells, fixed filters are generally adopted to filter impurities of the produced substances so as to prevent solid phase particles from scouring and damaging ground pipelines or devices and prevent gas phase or liquid phase substances from corroding and damaging physical and chemical aspects of ground external transmission systems. The prior art has the problem of filtering and treating only the output in the early production stage of the natural gas well, and the output in the later production stage of the natural gas well contains a large amount of various impurities, so that the prior filtering device cannot effectively solve the difficult filtering problems. Disclosure of Invention The invention aims to solve the technical problems of overcoming the defects of the prior art and providing a combined gas well sand removal and filtration device. The technical scheme adopted by the invention for solving the technical problems is that the sand removal and filtration device for the combined gas well is characterized by comprising two parallel filtration units, namely a first filtration unit and a second filtration unit, wherein the first filtration unit comprises a first valve, a first basket filter, a first tubular filter, a second tubular filter and a second valve; the first valve, the first basket filter, the first tubular filter, the second tubular filter and the second valve are sequentially connected through pipelines from left to right; The third valve, the second basket filter, the third tubular filter, the fourth tubular filter and the fourth valve are sequentially connected through pipelines from left to right; Filter screens that can filter out larger particulate impurities, including but not limited to one or more of a back-wound wire screen, a self-cleaning screen; Filter screens within which smaller particle impurities may be filtered include, but are not limited to, one or more of a back-wound wire screen cylinder, a self-cleaning wire winding cylinder, a self-cleaning screen cylinder; the second tube filter, a filter screen within which fine particulate impurities may be filtered, may be installed including, but not limited to, one or more of a back-wound wire screen cylinder, a self-cleaning wire winding cylinder, a self-cleaning screen cylinder. Preferably, the first tubular filter, the second tubular filter, the third tubular filter and the fourth tubular filter are all provided with pressure gauges. Compared with the prior art, the invention has the beneficial effects that the multi-combination double-loop integrated design thought is adopted, the filter materials with different meshes, the filter core devices with different structures and the double-loop filter combination are utilized to carry out multi-stage filtration on underground impurities produced in the later period of the natural gas well, including stratum sand, filling sand, solid-phase particles, organic matters, colloid asphaltene, foam discharging agent and the like, so that the multi-stage filtration can be realized, the omnibearing blocking and interception can be realized, and the effect of not influencing the normal working and running of the ground treatment device can be achieved. The first filtering unit and the second filtering unit are continuously and alternately operated, so that continuous production of the natural gas well is ensured, and the production efficiency of the gas well is improved. Drawings Fig. 1 is a schematic structural diagram of a first embodiment of the present invention. Detailed Description The invention is further described below with reference to the accompanying examples: Example 1 As shown in figure 1, the sand removal and filtration device for the combined gas well comprises two parallel filtration units, namely a first filtration unit and a second filtration unit, wherein the first filtration unit comprises a first valve 1, a first basket filter 2, a first tubular filter 3, a second tubular filter 4 and a second valve 5, and the second filtration unit comprises a third valve 6, a second basket filter 7, a third tubular filter 8, a fourth tubular filter 9 and a fourth valve 10; The first valve 1, the first basket filter 2, the first tubular filter 3, the second tubular filter 4 and the second valve 5 are sequentially connected in a pipeline from left to right; The third valve 6, the second basket filter 7, the third tubular filter 8, the fourth tubular filter 9 and the fourth valve 10 are sequentially connected in a pipeline from left to right; Filter screens that can filter out larger particulate impurities, including but not limited to one or more of a back-wound wire screen, a self-cleaning screen, may be insta