US929191A - Well-strainer. - Google Patents

Description

A. M. BROWN & P. HUNTER.

WELL STEAINEE APPLICATION II LED SEPT. 24, 1907.

Patented July 27, 1909.

UNITED STATES PATENT OFFICE.

' an'rnua MELVILLE BROWN AND FRANK HUNTER, or nous'rou, TEXAS.

wELL-s'rRAmEn.

Patented July 27, 1909.

Application filed. September 24, 1907. Serial No. 39%399.

T 0211 who m itmcy concern:

and FRANK HUNTER, citizens of the United;

' a full, clear,

.Be it known that we, ARTHUR .M. BRowN States, re'sidingat Houston, Harris county, State of Texas, have inventedmertainnew and us T' H and a e do her-elf declarethe'followingto be H I and exact description of the invention, such as willenable others skilled in the-art to which -it appertains to make and use the same'i j ments in well, .f'screens or 1 in the light This inventf'on relates to-certain improvestrainers;' and the objects and nature of the. invention will be readily understood by those skilled in the art of the following explanation of the construction shown inthe accompanying ing. Fig.

In the accompanying drawings as the preferred embodiment from among other structures and arrangements within the spirit and scope of our invention.

The invention consists in certain novel features in construction and in combinations fully hereinafter.

Referring to the accompanying draw- 1, is a side elevation of a portion of a well tube or casing constructed tojform a screen or strainer in accordance with .the present invention. Fig. 2, is an enlarged elevation of a portion of said cas- 3, isv a cross section 'on the line 3 3, Fig. 2. Fig. 4, is an elevation on an enlarged scale of a portion of the well casingadjac'ent to one of the perforations,

before the strainer bars have been applied. Fig. 5, is a longitudinal section of the casing on the'line 5-5, Fig. 2, one of the strainer bars appearing in side elevation. Fig. 6, is a .detail perspective view of one of the strainer bars.

da wings, 1, is a section of a well tube or casing formed to permit inflow of water, oil

This casing through the walls thereof.

' or-- tube section. is usually arranged D at the lower end of the well tube or casing to form the intake end thereof, and' is formed with any suitable number of radial erforations or intake holes 2, drilled or otherwise formed in the casing at regular intervals or arranged or sirable manner and spaced in any deof the desired diameter or the requirements of the to suit .c'onditions Means are provided to particular well. screen each perforat1on, or

"tnnrovements in Well-Strainers ,7

"grooves or slots can in other words,

each perforation is provided with its separate fiidividual strainer or'screeningsurface.

The. strainers of the various perforations are preferably similar in construction and formation, and each strainer preferably consists of a series ofparallel closely arranged similar bars 3, usually arranged lengthwise or longitudinally of the casing and fixed therein bridging the perforation, and usually with their outer edges approximately flush with and conforming to the curvature of the outer surface of the casing, as

more particularly illustrated by Fig. 3, of the drawings.

As at present advised, we prefer to employ strainer bars 3, similar in shape and dimensions, and each bar can be'fo-rmed of any suitable material, such as brass or any other suitable metal not quickly deteriorated by the action of water or oil., In theexample illustrated, the bar 3, is in length greater than the diameter (or. greatest width) of a perforation '2, so that its opposite ends can be inserted and fit down in slots or grooves a, formed in the outer surface of the casing adjacent each perforation. .These slots or grooves 4:,

are preferably arranged longitudinally or lengthwise of the casing and the grooves'of the series at each perforation "are parallel and are substantially uniformly spaced apart. into a perforation and tapers or decreases in depth away from the perforation, and each groove isusually V shaped in cross section to center and hold the bar thereiiu'although we do not so wish to limit all features of the invention. These I be formed at each perforation and in the outer surface of the well casing in any suitable manner and by any suitable means to permit the strainer bars being inserted in the casing and rigidly secured or fixed therein. In the specific example shown, each bar is in the form of a narrow flat elongated plate longitudinally curved at its inner edge throughout its length and at both side faces transversely beveled to form a The bar is formed with a straight fiat longitudinal outer edge 6, and with flat side Each groove or slot at one end opens usually gradually V-shaped inner edge 5.

faces 7, adjacent the outer edge, while the which each bar can be sweated, brazed oi form inclined "brfii ethod' of securing soldered. in the do not wish to limit; all features of our invention t'o inserted strainer bars of any particular shape; nor to anyparticular means the bars in the casing bridgin the perforations. lVe prefer to ar range he inserted "bars vertically, that is length wise of thewell casing, and also'as-at present 'advised prefer to so-arrange and' form the bars that the straining surface at' f c'aeh perforation is -forn1ed-.-by vertical narrow-s1its, "each rad'ually flaring outwardly transversely -.(see Fig. '3) at its inner side to permit free, rapid fiow into the casing carrying Sediment 'froin the slits. A strainer involving thes'e in'serted bars. can be easilv' .oleanedand does not readilybecome fouled byclay, .mud "otother sediment, and is exeeedinglydurable in construction and can be manufactured economically.

It is evident that .various changes and modifications might be resorted to,-and that velements:"mightbe. added or omitted, without departing from the spirifliand 'scope of our invention, hence we do not wish to lllmitbul' selves to described.

What we claim and Letters Patent of the United States is l. A well strainer having a pipe with holes and slots opening therei-nto and extending therefrom, and bars separately inserted and secured in saidjslots. and

to form strainer surfaces.

theexact construction shown and 2. Awellstrainer-comprisinga pipe having an inlet opening and spacedgV -shaped slotsin its outer wall and extending from .saidopening, and spaced bars inserted and secured in saidslots. and bridging said openingto form astrainer surface therein.

3.1 A well strainer -comprising theperforated' pipe having paced slots arranged lengthwise thereof and extendin from a perforation and strainer bars brif ing said perforation arranged lengthwise o the pipe and-secured in saidslots;

I h A well casing .h'aving series of inlet openings, strainer surfacesfor and in .each

opening eachjsurface composed ofv spaced opening and 'set and seinthe adjacent walls 0 y the casing said bars arranged between thev barsbridging the. cured permanently planes of inner and outer surfaces of the casing. I w I SKA well casing'having series of separate inlet perforations,- and separate series of strainer .bars for said perforations, each bar being inserted and separately secured in the casing adjacentjto the perforation bridged.

thereby.

pipe casing. However, we

desire to secure by.

bridging said holes 6'. A .well strainer comprising a casing having inlet openings, and strainer surfaces for said opening, each surface composed of a series of similar bars bridging. and pro- ]ecting beyond. the opening with its projected ends'seated and soldereddown in the casing.

,7. .A well strainer comprising a casing having an inlet opening, and strainer surface or said opening flush with the outer surface of the casing and consisting'of a series of similar separately formed parallel bars inserted in .the casing.

having inlet. perforations, and separate strainer surfaces for said .strainer surface comprising separately formed similar parallel bars bridging the perforations and inserted in the. adjacent walls of the casing and having their outer edges substantially flush with the outer surface of the casing.

9. A well strainer having an inlet opening, and a strainer surfacethereover composed of a series of parallel separately-formed similar strainer bars bridging said opening and at their opposite perforations, each comprising a casing each bar having 8. A well strainer comprising a casing ties of the bars being depressed, and means inserted in said ends to secure said bars in the stantially as described.

11. 'A well strainer comprising a casing casing, subseats over said depressed having series of radial inlet openings with depressed outer seats in the walls adjacent thereto, andstrainer bars bridging said openings with their ends resting in said seats and having reduced end portions at their outer edges, said bars being secured by solder on said reduced, end portions.

In testimony whereof we aflix our signa- I tures, in presence of two witnesses.

ARTHUR MELVILLE BROWN. FRANK HUNTE R.

v 'Witnesses:

CLINTON S: EMrRsoN, F. O. Biomass.

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