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Publication numberUS1950202 A
Publication typeGrant
Publication dateMar 6, 1934
Filing dateJun 20, 1932
Priority dateJun 20, 1932
Publication numberUS 1950202 A, US 1950202A, US-A-1950202, US1950202 A, US1950202A
InventorsWillers George E
Original AssigneeA D Cook Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Terminal coupling for well strainers
US 1950202 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

March 6, 1934. G. E. WILLERS TERMINAL COUPLING FOR WELL STRAINERS Filed June 20, 1932 PGL L ATTORNEYS Patented Mar. 6, 1934 PATENT OFFIQE 7 TERMINAL COUPLING FOR WELL STRAINERS George E. Willers, Lawrenceburg, Ind., assignor to A. 1). Cook, Inc., Lawrenceburg, Ind., a corporation of Indiana Application June 20, 1932, Serial No. 618,280

12 Claims.

My invention relates to terminal couplings for deep well strainers, in which coupling members are provided with means for attachment to other suitable connections and as end supports for well strainers. In my Patent No. 1,862,838, of June 14th, 1932, I have described a well strainer and coupling with a ring inside the strainer for use with a strainer coupling, which is required to be flush with the outside of the strainer.

It often becomes desirable for the driller of a well to develop the well by means of working a close fitting plunger inside of the strainer. This makes the use of a strainer having internal flanges or rings undesirable.

15 It is, therefore, the object of my invention to provide a strainer coupling in which the inside diameter of the strainer and coupling will be uniorm throughout its entire length.

Another object of my invention is to provide a 2 strainer of uniform inside diameter in which the ends of the helical strainer wires are protected on the outside.

Another object is the provision of a coupling in which reinforcement is provided for the bar sup- 5 porting the strainer windings by means of segmental plates wedged between the supporting bars, thereby providing a strong and durable strainer assembly.

Referring to the drawing, in which I have illustrated a preferred type of construction embodying the principle of my invention:

Figure 1 is a side elevation with parts in section.

Figure 2 is a cross section along the lines 22 of Figure 1.

I have indicated a plurality of supporting bars 1 which have square cut threads 2 which extend around the bars in a spiral direction. Windings 3 are placed in the notched threads, and the windings may be secured within the threads by calking, welding or soldering.

The ends of the bars 1 project beyond the end of the winding wire, but the square notched thread is continued throughout the length of the bars, as indicated at 4. A terminal coupling 5 is internally threaded as indicated at 6, with threads which match the spiral thread in the supporting bars 1, so that the coupling may be threaded in the position as indicated in Figure 1.

Pieces '7 of segmental shape are fitted between the side edges of the bars 1, so that they provide a brace extending between the bars. The pieces '7 are so fitted between the bars that they will not project beyond the inner faces of the bars nor beyond the bottom of the notched thread 4 on the outer faces of the bars 1.

When the terminal coupling 5 is secured in position it has a recessed flanged portion 8 which extends down over the first one or two windings of the screen wire 3.

After assembling the reinforcing segments '7 between the ends of the bars 1, and after assembling these parts within the terminal coupling 5, the whole assembly is sweated in thus firmly 6 attaching the terminal couplings to the ends of the strainer.

It will be observed that with this construction there will be no shoulders on the inside of the strainer, and the inside diameter will be uniform throughout its entire length, so that a closefitting plunger may be worked inside of the strainer.

It will further be noted that the end of the winding wire is protected on the outside by means of the internally recessed flange 8.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:-

1. In combination, a well strainer having circumferentially spaced bars with helically wound wire secured externally of said bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling having an internally flanged recess into which said bars extend, the inner surfaces of the bars, the inner surfaces of the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface.

2. In combination, a well strainer having circumferentially spaced bars with helically wound wire secured externally of said bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling having an internally flanged recess into which said bars extend, the inner surfaces of the bars, the inner surfaces of the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface, and said coupling, bars and pieces joined into an integral self-sustaining assembly.

3. In combination, a well strainer having circumferentially spaced bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling having an internally flanged recess into which said bars extend, the inner surfaces of the bars, the inner surfaces of the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface, said bars being provided externally with threads, and helically wound wire seated within said threads.

4. In combination, a well strainer having circumferentially spaced bars and having arcuate reinforcing pieces secured therein and extending betweenthe bars, a coupling having an internally flanged recess into which saidbars extend, the inner surfaces of the bars, the inner surfaces of-the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface, said bars being provided externally with threads, and helically wound wire. seated". within said threads, portions of said bars extending be'-- yond the end of the helically wound wire having continuations of the threads in said portions, andl said coupling having threads engaging said threads of said bar portions.

5. In combination, a well strainer having circumferentially spaced bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling; having an internally flanged recess into which said bars extend, the inner surfaces of the bars, the inner surfaces of the reinforcing pieces andthe inner surface of the coupling lying in the same cylindrical surface, said bars being provided externally with threads, and helically wound wire seated within said threads, said coupling having an annular recessed portion housing the end turns of the Wire.

6. In combination, a well strainer having circumferentially spaced bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling having an internally flanged recess into which said bars extend, the inner surfaces of the bars, the inner surfaces of the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface, said bars being provided externally with threads, and helically wound wire seated within said threads, said coupling having an annular recessed portion housing the end turns of the wire, the outer surfaces of said reinforcing pieces lying in the same cylindrical surface as theinner surfaces of the threads in the bars. i r

7. In combination, a well strainer having circumferentially spaced bars and having arcuate reinforcing pieces secured therein and extending between the bars, a coupling having an internally flanged recess into which. said bars extend, the inner surfaces of the bars, the inn-er surfaces of the reinforcing pieces and the inner surface of the coupling lying in the same cylindrical surface, said bars being provided externally with 3 threads, and helically woundwire seated. within said threads, said coupling having, an annular recessed portion housing the end turns of. the wire, the thickness of the reinforcing pieces being equal to the distance from the base of the threads inthe rods to the inner surfaces of said rods.

8. In combination witha well strainer having supporting bars and wire wound and secured out-' side the bars in a helical formation, an end coupling piece having an internal annular recess receiving the ends of the bars in the internal bore thereof and arcuate reinforcing pieces extending between sides of said bars, the depth of the internal annular recess in said. coupling being equal to the thickness of said pieces.

9. In combination with a well strainer having supporting bars and wire wound and secured outside the bars in a helical formation, an end coupling: piece having an internal annular recess receiving the ends of the bars in the internal bore thereof and arcuate reinforcing pieces extending; between sides of said bars, the depth of the internal annular recess in said coupling being equal to the thickness of said pieces, said bars having external. threads, said internal annular recessed portion of said coupling having threads engaging the threads of said bars.

10. In. combination: witha. well strainer having supporting bars. and wire wound and secured outsidethe bars. in a helical formation, an end coupling piece having an internal annular recess receiving the ends of the bars inthe internal bore thereof and arcuate reinforcing pieces extending between sides of said bars, the depth of the internal annular recess in said coupling being equal to the thickness of said pieces, said bars having external. threads, said internal annular recessed portionof said coupling having threads engaging the threads of said bars, said coupling having a sleeve extending down over. the end turn of said helically wound wire.

11. In. combination with a well strainer having. supporting bars and wire wound and secured outside the bars in a helical formation, an end coupling piece. having an internal annular recess receiving the ends of the bars in the internal bore thereof and arcuate reinforcing pieces extending between sides of said bars,.the depth of the internal annular recess in said coupling being equal to the thickness of said pieces, said bars having external threads, said internal annular recessed portion of said coupling having threads engaging. the threads of said bars, said coupling having a sleeve extending down over the end turn of said helically wound wire, and said parts sweated together intoa self-sustaining assembly.

12. In combination with a well strainer comprising bars spaced around a circle and having notches in their outer edges in helical series and Wire helically disposed. and occupying the bar notches except notches near adjacent ends of the bars, a coupling having internal threads screwed into. said notches near said ends of the bars, and having a terminal. unthreaded sub stantially smooth sleeve. portion closely embracing terminal portions of the wire to hold said terminal portions securely in the notches.

. GEORGE E. WILLERS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2487888 *Jun 6, 1944Nov 15, 1949Layne & Bowler IncWell screen
US5190161 *Feb 27, 1991Mar 2, 1993Arai Machinery CorporationCylindrical element for filtering and separation
US8267169 *Mar 13, 2009Sep 18, 2012Schlumberger Technology CorporationMethods and apparatus for attaching accessories to sand screen assemblies
US20090229823 *Mar 13, 2009Sep 17, 2009Schlumberger Technology CorporationMethods and apparatus for attaching accessories to sand screen assemblies
EP0054828A1 *Dec 8, 1981Jun 30, 1982Nagaoka Kanaami Kabushiki KaishaDeep well screen
EP0151193A2 *Dec 8, 1981Aug 14, 1985Nagaoka Kanaami Kabushiki KaishaScreen
EP0151193A3 *Dec 8, 1981Dec 11, 1985Nagaoka Kanaami Kabushiki KaishaScreen
Classifications
U.S. Classification166/231
International ClassificationE21B43/02, E21B43/08
Cooperative ClassificationE21B43/088
European ClassificationE21B43/08W