US1518697A - Of houston - Google Patents

Description

Patented Dec. 9, 19124.

"UNITED STATES MELON E. LAYNE, 0F H O'USTON, TEXAS.

WELL SCREEN.

Application filed April 19, 1928. Serial No. 888,082.

To all whom it may concern:

Be it known that I, MAHIDN E. LAYNE, a citizen of the United States, residing at Houston, in the county of Houston and State of Texas, have invented a new and useful Well Screen, of which the following is a specification.

This invention relates to well screens such as are used for screening out sand or other solids from the liquid entering the well casilany types of perforated well screens have heretofore been proposed having various forms of normally open erforations 'and having different types 0 projecting lips or tongues extending outwardly over the perforations. It has been found that in instances where the perforations are normally open, that is where the screen is completed in its final form before insertion into a well, the screen cannot be driven into the earth or readily inserted into a well bore without clogging the perforations to such an extent as to render the screen partly, if not entirely, inefiicient. 'Further it has been found that .withscreens having outwardly projecting lips or other projections such clogging is augmented especially in attempting to drive such a screen into the earth.

It is an object of the present invention to overcome such objectionable features by providing a screen as an article of manufacture and in which the protecting lips or tongues are normally 'closed over the associated perforations during the driving or inserting of the screen to its position of use and" in which the tongues are subsequently forced outwardly to open the perforations; to provide a structure which in its normal condition presents a smooth continuous exterior surface, facilitating such driving or insertion of the'screen; and to provide ascreen comprising an inner erforated pipe and an outer pipe forrne of almetal ribbon wound spirally around the inner pipe coil on coil and split longitudinally of the pipe on oppositogfglsides of each perforation to define tongi'ies which are normally closed to present a smooth continuous exterior surface during insertion of the screen and which are adapted to bf]: forced outwardly after the screen is in p ace.

Another object is to provide a scriaen which will be exceedingly strong and durable, which may be economically -manufalctured, and which: will efficiently perform the services of which it is designed.

Various other objects and advanta es will be more fully apparent from the fo lowing description of the accompan ing drawings which form a part of this isclosure, and which illustrate a preferred form of em bodiment of the invention.

Of the drawings:

Figure 1 is a si e elevation, partlv in sec: tion, of one form of the screenof the present invention.

Fig. 2 is an enlarged detail-section showing some of the tongues in closed position.

Fig. 3 is an elevation, similar to- Fig. 1, showing another form of the screen,'and

Fig. 4 is an enlarged detail section, similar to Fig. 2 of a portion of the screen shown in Fig. 3. I

In Figs. 1 and 2, the. screen comprises .an inner pipe 1 which is provided with a plurality of spirally arranged perforations 2 relatively positioned so as to form longitudinal rows relatively spaced around the pipe, and an outer pipe which is formed of a metal ribbon 3 wound spirally around the inner pipe coil on coil to correspond to the spiral progression of the perforations 2 and referably with the lower half of the rib on overlapping the perforations.

The ribbon is grooved or scored lengthwise as at 4 and is split inwardly from its lower edge to the groove 4 on opposite sides of each of the perforations 2, as indicated at 5, to define tongues 6 overlying the perforations.

The opposite edges of! the ribbon are beveled outwardly and downwardly with the split edge of each convolution overlapping the upper edge of-the adjacentcon volution, so that when the tongues 6 are bent outwardly the adjacent beveled edges form an upwardly'angled throat 7 communicating with the companion perforation -(see Fig. 2).

The ribbon 31 is preferably of substantial thickness so as to materially strengthen the inner pipe and also to proi'ide qtongues of sufiicient thickness to withstand hard usage, and for this reason the groove 4 is particularly advantageous in contributing to an easy bending of the tongues.

In the form of screen shown in Figs. 3 and 4, the ribbon 3 is wound upon the mnerplpe 1 'with the meethig edge of the ribbon being slit longitudinally of the pipe to said groove and on opposite sides-0f each perforation to define tongues adapted to be subsequently bent outwardly to form openings communicating with the perforations in the inner pipe.

7. An article of manufacturecomprising an inner pipe having a plurality of relatively spaced perforations in its wall, and an outer pipe formed of a metal ribbon wound spirally'around the pipe coil on coil, both edges of said ribbon being split longitudinally of the pipe on opposite sides of each perforation to define tongues adapted to be subsequently bent outwardly to form openings communicating with the perforations in the inner pipe;

Signed at South Pasadena, Cal, this 12th day of April 1923. MAHLON E. LAYNE.

Dec. 9, 1924- P.J.LUCEY SLICING MACHINE Filed March 5. 922

2 Sheets-Sheet 1 if: 2/6222 r Dec. 9, 1924. 1,518,697

- P. J. LUCEY SLIGING MACHINE Filed March 5, 1922 2 Sheets-Sheet 2

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