US 2310507 A
Description (OCR text may contain errors)
1943- 4 I c. E. BODEY, JR 2,310,507
DEEP WELL SCREEN Filed Nov. 22,1940 2 Sheets-Sheet 1 Inventor:
Feb. 9, 1943. c. E. BODEY, JR
DEEP WELL SCREEN 2 Sheefs-Sheet 2 Filed Nov. 22, 1940- s.E.Bo a
Patented Feb. 9, 1943 UNETED S'l" TES "AT E ice DEEP WELL-SCREEN Charles E. Bodey, Jr., St. Paul, Minn., assignor to Edward E. Johnson, Incorporated, St. Paul,
My invention relates to .deep well screens and has for its object to provide a novelscreen structure which may be simply and cheaply manufactured without the employment of expensive appliances.
In the manufacture of well screens it has been a practice to wind a wirehelically upon a series of longitudinal rods held so that their limits outline a cylinder and to secure together by some direct means the rods and the spaced helical coils of the Wound wire so that the helical channel extending between the various coils of the wound wire will constitute in effect a series of circumferential drainage slots. The securing has been done by means of successive welding v of the wire and rods at each crossing point or by channeling the rods across, setting the wound wire into the channels and thereafter distorting the metal to hold it in place. Rods spaced together close enough to form vertical drainage slots also have been employed but united to circumferential supporting members in the same way.
It is a principal object of my invention, in order to avoid this form of securing, to provide means for securing .together longitudinal rods and circumferential loops of wire by a simple cooperative arrangement of the rods and wires with spreader loop members whereby the rods and the Wires mutually hold each other in position and no welding or deformation of metal takes place, and this will be effected both for well screens in which the circumferential loops of wire form the drainage slots and in which the longitudinal members form the drainage slots.
It is a further object of my invention to provide a well screen wherein the wire is Wound into a helix independently of the rods, and binder and spreader members are inserted between the coils of the wire, and rods are inserted'in the loops of said spreader members on the underside of the helix so that the coils of the helix are thus held positioned to form a circumferen tial well screen.
It is a further object of my invention to secure portions of the several rods extended outside of the helix to male and female head fittings by means of which the rods are held in proper position and the screening surface formed by the helically wound wire is permanently set without the use of welding, deformation of metal or solder or other similar means.
It is a further object of my invention to provide hollow spreader members U-shaped in cross section which are formed with transverse slots such that the members may be inserted over helical loops or rings and thereafter longitudinal wires thrust through the loops to bind the spreader members and loops together into an integrated well screen.
application of constructed in accordance with my invention before the head fittingshave been applied-- Fig. 2 is a plan view of my screen with the head fittings applied and with some parts-broken away and in section.
Fig. 3 is a perspective view of one of the binder and spreader members.
Fig. 4 is a perspective view of one of-the longitudinal rods adapted to be inserted therethrough.
Fig.5 is a longitudinal fragmentary view partly in section showing how the helical coils of wire are'held spaced by the binder and spreader members and a rod inserted in the'loops thereof.
Fig.6 illustrates the manner in which the helical coils are wound upon a specially formed base.
Fig. 7 shows a variant formof binder" and spreader member in position uponzfi portion of one of the helical coils.
Fig. 8 is an end view similar to Fig. 1 showing how the spreader members and locking rods therein maybe employed for development .of a screen having vertical drainage slots between adjacent pairs of spreader members.
Fig. 9 is an elevation view of sHchascreen wherein circular bands or hoops of metal are employed in place of a helically'woundwire.
Fig. .10 illustrates the manner in which a helically wound wire may be applied to a well screen having vertical drainageslots.
Fig. "11 is an enlarged part sectional fragmentary view showing how the parts arelocked together.
Fig. 12 is a fragmentary part sectional plan view showing the manner in .which the parts are locked together where the verticalslots are employed.
Fig. 13 is a perspective part sectional vie w .19, Fig. 3, meeting in a common plane at thus forming a flat top 2|, Figs. 2, 5 and 6, or
Fig. 16 is a plan view of a metal sheet from which the spreader members are formed showing the manner in which such a member may be provided with spacers.
In constructing the first form of my screen I provide cylinders IQ of which a portion of one is shown in Fig. 6 having longitudinally depressed portions H forming longitudinal grooves 12. Upon this base is helically wound by any desired means, in the first instance a continuous helix formed of a wire 13 of any desired shape, as shown circular in cross section. This wire will be roughly spaced whatever distance apart is desired to form the screening slot. As so spaced it will overlie the various longitudinal grooves I 2 which are equally spaced about the forming cylinder 10. When the winding operation is completed, therefore, the wire 13 will lie in a helix comprised of a multiplicity of spaced helical coils upon the forming cylinder l0, all of said coils overlying the longitudinal grooves or channels I2. It will be understood, of course, that a set of said forming cylinders such as IE] will be provided for obtaining screens of different desired diameters, but in each case the longitudinal grooves [2 will be equally spaced about the cylinder, in practice as nearly as may be the same dstance apart in each of the cylinders.
The binder and spreader members I4, as shown in Fig. 3, may be formed of a stamping of metal,
having U-shaped portions I 5 separated by spaces 16 with a suitably curved bottom I! and a flat top formed of bent-over flange members 18 and spreader and binder members 22 may be formed of tubing which are circular in cross section, as shown in Fig. 7.
After the helix of wire l3 has been laid upon the forming cylinder ID the requisite number of binder and spreader members M are forced into position so that the U-shaped loops [5 straddle the coils of wire and receive them within the spaces IS. The rods 23 are then forced endwise through the loops l5 inside of the helical coils of wire [3 with portions 24 of said rods 23 extending outside of the outer limits of the cylinder of helical coils. of Figs. 1 to 8 the rods will be spaced apart distances as great as will result in a well screen sufficiently reinforced to :be of necessary strength and rigidity. The forming cylinder I0 is then withdrawn from within the sets of helical coils, leaving the screen formation complete with the extended ends 24 of rods 23 outside of the screen portion held together by the binder and spreader members 14. An internally threaded female header 25 and an externally threaded male header 28 are formed with holes 21 adapted to receive the ends 24 of the rods 23. These header members are assembled upon the rod ends 24 by the insertion of said rod ends within the holes 21, as shown in Fig. 2. The rods are permanently secured by welding, soldering or other suitable means within the holes 21 and the screen is thus completed.
In the form of the invention of Figs. 8 and 15 substantially the same spreader members 30 are employed as in the other form. In this later form, however, the spreader members, placed in close proximity one to the other, provide a multiplicity of longitudinal drainage slots 3! which constitute the draining system. Widely spread helical loops 32, Fig. 10, of a helically wound In the form of well screen next succeeding spreader member 30.
be a multiplicity of circular bands or hoops 34 which cooperate with the spreader members and with the rods 23 exactly as in the form where the helical loops are employed. As shown in Figs. 8 and 10 the helical loops 32 are employed. As shown in Figs. 9 and 14 closed bands or hoops of metal are employed, the form of which in Fig. 14 comprises a spreader member 35 of roughly triangular cross section and hoops 36 of band iron or steel, while the hoops of Fig. 9 are of round metal.
Inasmuch as the spreader members conceivably might slip on the circumferential locking device, whether they be helical loops as in Fig. 10 or closed rings or bands as in Figs. 9 and 14, contact lugs 37 may be provided which, as clearly indicated in Fig. 15, engage adjacent walls of the The spreader members are normally formed by stamping and die forming a fiat plate 48, such as indicated in Fig. 16. This plate will be stamped with an opening 4|, which provides the slots 16, with crimping lines 42 which provide for the top plates 18 and I9, and with a lip 43 cut at M and 45 and crimped at i6 which in the die-forming operation will be brought out laterally to produce the lug members 31.
I have pointed out in the foregoing detailed description the various structural features and arrangements covering the advantages resulting from the use of my invention. Whether the well screen be one formed with a circumferential slot arrangement resulting from spaced helical coils, or with a multiplicity of vertical slots resulting from closely spaced longitudinal spreader members, the resulting screen is strong, eificient and very cheap to make. It provides a series of rows of short channels either across the spaces between the spreader members 23 or between sets of circumferential binder members 32 or 34. In the first case the width of the channels will be determined by the width of the U portions 15 of the binder and spreader members between pairs of transverse slots l6, which may be varied to practically any extent desired, or by the width of the lugs 31 and also the width of the spreader members 30 which likewise may be varied as desired. The completed screen is strong and efi'icient, it is primarily a simple assembly device the work of which can be done by unskilled labor, and hence the screen member can be manufactured and sold at a moderate price.
A well screen comprising a helix of wire forming a screening surface, spreader members on said helix formed with depending loops between each adacent pair of coils thereof, the loops serving to hold the helical coils equally spaced one from the other, a series of rods extending through said loops and engaging the helical coils on the inner circumference thereof for holding the spreader and binder members united to the helix, said rods extending outside of the end limits of the helix, and fittings secured to the extended portions of said rods.
CHARLES E. BODEY, JR.