Wells – Screens – Porous material
Patent
1990-10-22
1992-02-18
Novosad, Stephen J.
Wells
Screens
Porous material
291638, 21050025, 2105101, 419 28, B01D 3920, E21B 4308
Patent
active
050885545
ABSTRACT:
A tubular sand screen is made in one piece entirely of powdered metal slivers which are molded and sintered to form a metallurgically integral rigid tubular structure. Aggregate metal particles, for example, stainless steel slivers, are bonded together by interatomic diffusion as a result of sintering the compacted slivers under high temperature and pressure conditions. The sintered metal sand screen performs the function of the conventional prepack assembly as well as the screen function. In one aspect of the invention, the sintered metal screen is subjected to electropolishing to yield an effective porosity of 40-60 mesh, with an average pore size of 150 microns. Most of the surface irregularities are removed by electropolishing, and very few nucleation sites remain where particles in the size range of 74 microns-100 microns can become captured or otherwise lodged to cause plugging of the screen.
REFERENCES:
patent: 1874035 (1932-08-01), Fletcher
patent: 2554343 (1951-05-01), Pall
patent: 2600150 (1952-06-01), Abendroth
patent: 2826805 (1958-03-01), Probst et al.
patent: 2963163 (1960-12-01), Veres
patent: 3033783 (1962-05-01), Lubben
patent: 3201858 (1965-08-01), Valyi
patent: 3313621 (1967-04-01), Mott
patent: 3567437 (1971-03-01), Mott
patent: 3605245 (1971-09-01), Zapf
patent: 3632243 (1972-01-01), Mott
patent: 3746642 (1973-07-01), Bergstrom
patent: 3785038 (1974-01-01), Zapf
patent: 3897531 (1975-07-01), Overhoff et al.
patent: 4071937 (1978-02-01), Rohlig
patent: 4072616 (1978-02-01), Rohlig
patent: 4088580 (1978-05-01), Spurlock
patent: 4186100 (1980-01-01), Mott
patent: 4217141 (1980-08-01), Schrittwieser
patent: 4483820 (1984-11-01), Schelb
patent: 4705611 (1987-11-01), Grimes et al.
patent: 4755265 (1988-07-01), Young
patent: 4811790 (1989-03-01), Jennings, Jr. et al.
patent: 4821800 (1989-04-01), Scott et al.
The Pall Porous Metals Filter Guide, Pall Trinity Micro Corp., Sep. 1978.
Faust, Charles L., "Electropolishing I-The Practical Side", Metal Finishing, Jul. 1982, pp. 21-25.
Faust, Charles L., "Electropolishing-The Practical Side II", Metal Finishing, Aug. 1982, pp. 59-63.
Faust, Charles L., "Electropolishing-Stainless Steel", Metal Finishing, Sep. 1982, pp. 89-93.
Faust, Charles L., "Electropolishing-Stainless Steel, Part II", Metal Finishing, Nov. 1982, pp. 65-67.
Arterbury Bryant A.
Spangler James E.
Griggs Dennis T.
Novosad Stephen J.
Otis Engineering Corporation
LandOfFree
Sintered metal sand screen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sintered metal sand screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sintered metal sand screen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1816740