A filter of solid particles for oil, gas, and water, having a headpiece comprising: a pipe substantially resistant to the chemical and physical damage caused by the material to be filtered, with the surface of said pipe defining a filtration area comprising a plurality of perforations that allow fluid to pass through the wall of the pipe , wherein said pipe comprises nuts on the ends thereof; a plurality of filtration rings made of a plastic material assembled in a concentric shape on said filtration area of the pipe , said rings being placed in parallel on top of each other, and wherein each of the rings comprises a plurality of internal extensions providing support on and separation from the pipe , defining a space for the fluid to circulate between the inner borders of the rings and the surface of the pipe , and one of the surfaces of each ring comprises perpendicular guiding extensions that fit into corresponding fitting perforations present in the neighbouring rings , and a plurality of supports distributed along the perimeter on one side of the ring , with the height thereof providing a distance of separation determined by the particle to be trapped; characterised in that the filter further comprises at least two supporting rings mounted on the pipe and placed on each end of the set of filtration rings , adjusting and defining at least one section, wherein each of said supporting rings is adjusted on the pipe by fixing means ; and at least one intermediate separating ring placed between two filtration rings of the set of filtration rings and being configured for separating the plurality of filtration rings into a first and a second sub-sets of filtration rings ; and wherein said intermediate separating ring is adjusted on the pipe by fixing means . a pipe substantially resistant to the chemical and physical damage caused by the material to be filtered, with the surface of said pipe defining a filtration area comprising a plurality of perforations that allow fluid to pass through the wall of the pipe , wherein said pipe comprises nuts on the ends thereof; a plurality of filtration rings made of a plastic material assembled in a concentric shape on said filtration area of the pipe , said rings being placed in parallel on top of each other, and wherein each of the rings comprises a plurality of internal extensions providing support on and separation from the pipe , defining a space for the fluid to circulate between the inner borders of the rings and the surface of the pipe , and one of the surfaces of each ring comprises perpendicular guiding extensions that fit into corresponding fitting perforations present in the neighbouring rings , and a plurality of supports distributed along the perimeter on one side of the ring , with the height thereof providing a distance of separation determined by the particle to be trapped; characterised in that the filter further comprises at least two supporting rings mounted on the pipe and placed on each end of the set of filtration rings , adjusting and defining at least one section, wherein each of said supporting rings is adjusted on the pipe by fixing means ; and at least one intermediate separating ring placed between two filtration rings of the set of filtration rings and being configured for separating the plurality of filtration rings into a first and a second sub-sets of filtration rings ; and wherein said intermediate separating ring is adjusted on the pipe by fixing means . <EOS>