US2811882A - Lugging disc for strainer wire - Google Patents

Description

NOV. 5, J. HESS LUGGING DISC FOR STRAINER WIRE Filed Aug. 6, 1949 3 Sheets-Sheet 1 5 INVENTOR.

mm Mass.

, BY gem ATT RNEVS NOV. 5, 1957 -1555 2,811,882

- LUGGING DISC FOR STRAINER WIRE 3 Sheets-Sheet 2 F E 4 l0 Filed Aug. 6, 1949 air.

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' LUGGING DISC FOR STRAINER WIRE Filed Aug. 6, 1949 3 Sheets-Sheet 3 INVENTOR. CI'AGK Hess BY mam ATTORN EYS United States Patent 6 LUGGING DISC FOR STRAINER WIRE Jack Hess, Houston, Tex... assignor to Houston Well Screen Company, Houston, Tex.

Application August 6, 1949, Serial No. 108,913 11 Claims. (Cl. 80-30) The invention relates to a device for forming lugs upon a wire of the type used in wrapping a pipe or foundation member to create a well screen or strainer where lugs are formed on the wire in order to determine the spacing of the wire wrapping and to create the gauge of the screen or strainer.

In the wrapping of wire about a foundation pipe in order to manufacture screen or strainer for pipe the pipe is rotated to wrap the wire thereon and a substantial tension is applied to the wire so that it will be wrapped uniformly about the pipe. Lugs are formed on the side of the wire so that the wire will be spaced from the previous wrapping of wire and the size of the lugs determines the gauge or the spacing of the strainer wire.

Heretofore the lugs have been formed on the wire by passing the wire between an anvil and a die where teeth were formed on the die as a permanent portion thereof. When the teeth became worn it become necessary to change to a new die.

With the present invention an arrangement and construction has been devised wherein teeth are in the form of round pins which are reversible end to end and may also be turned through a half turn so that as a matter of fact there are at least four surfaces available on each pin before the pin need be discarded on account of wear.

Another advantage of the present invention is the fact that the teeth are in the form of rounded pins so as to form rounded or crescent shaped cross-section lugs on the wire which provide an exceptionally large and evenly distributed bearing surface on the next wrapping of wire. The rounded surfaces of the pins avoid any sharp breaks or any shearing of the wire but merely accomplish the formation thereof. This particular construction of wire having rounded lugs is of advantage because there are no sharp corners at which shearing or breaking of wire may be initiated.

It is one of the objects of the invention to provide a lugging disc for well screen wire wherein the lugs are formedby rounded, replaceable pins.

A still further object of the invention is to provide a lugging device wherein a pair of complementary discs provide a face of a size to receive the wire to be lugged, and wherein rounded lugging pins engage one edge of the wire while it is thus confined in order to deform merely the edge of the wire in forming the rounded lugs on the side of the wire.

Another object of the invention is to provide a lugging disc wherein the lugging pins are removably and adjustably retained within the lugging discs in order to form lugs on the wire.

Another object of the invention is to provide a backing disc so that the pins will be more or less loosely retained and subject to turning action due to engagement with the wire so that the pins will automatically move to compensate for wear.

Other and further objects of the invention will be readily apparent when the following description is considered in connection with the accompanying drawings wherein:

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Fig. 1 is a side view of a device embodying the invention, same being partly broken away to show a section taken on the line 1--1 of Fig. 2 and looking in the direction of the arrows and illustrating the device in use for the forming of the lugs on the wire and showing also the wrapping of the wire about the screen.

Fig. 2 is a plan view of the device shown in Fig. 1 with certain parts broken away and illustrating the spacing of the wire on the pipe due to the provision of the lugs.

Fig. 3 is an end elevation of the lugging discs and complementary discs with the wire shown as being deformed by the lugging pin. This section is taken on the line 33 of Fig. 4.

Fig. 4 is an edge elevation of the lugging disc illustrating the pins and showing the anvil in dotted line.

Fig. 5 is a top view looking down on the wire to illustrate how the lugs are formed to project laterally from the wire.

Fig. 6 is a broken detailed view showing one form for retaining the pin in position so that it may be reversed end to end or may be rotated to provide an unworn surface.

Fig. 7 is an enlarged detailed view of the contact between the pin and the wire to form the lug which is taken on line 77 of Fig. 8.

Fig. 8 is an enlarged side elevation of the wire showing the formation of the lug with the forming pin shown in dotted line.

Figures 9 through 12 show a modified form of the device.

Fig. 9 is a flat elevation of the lugging disc illustrating the end view of the pins which view is taken on the section 9-9 of Fig. 10.

Fig. 10 is an edge elevation of the modified form of lugging discs wherein the pins are more or less loosely held but confined so that they may turn automatically to compensate for wear.

Fig. 11 is an edge elevation of the lug supporting disc showing the pins in section, this view having been taken on the line 1111 of Fig. 10.

Fig. 12 shows a view of the back of the discs which holds the pins against movement and in a proper position to create a definite size lug. This section is taken on the line 1212 of Fig. 10.

Referring first to Figures 1 and 2, in the forming of screen or strainer pipe for wells a section of well pipe 2 is shown as having been perforated at 3 with openings of a substantial size. In order to create the strainer portion a wire 5 is shown as having been wrapped around the pipe. In order to space the successive wrappings of the wire each from the other the wire is formed with a plurality of lugs 6 spaced along the wire, usually at the time that the wire is being wrapped upon the pipe.

In Fig. 1 the wire 5 will be taken from a suitable spool or supply of wire and will be passed between the discs 7 and 8 which may be said to be complementary discs in that the discs overlap each other. The shoulder or flange portion 9 is shown on the lugging disc 8 and at 10 on the anvil discs 7.

The discs 7 and 8 are mounted upon the shafts 12 and 13 respectively which are parallel and spaced apart with the disc being held upon the shaft by suitable keys 15.

Fig. 3 shows a side view looking at the wire 5 as the lugs 6 are being formed on the edge thereof. The wire is shown as passing between the discs 7 and 8 and also between the flanges 9 and 10. In this manner the wire is completely confined as best seen where the wire is shown in section in Fig. 4.

The lugging pins 26 are best seen in the enlarged view in Fig. 6 where each pin is in the form of a cylindrical member having a beveled end face 22 at either end.

In the form of the invention of Figs. 1 through 6 inclusive the lugging disc 8 is shown as having a bore 23 therethrough which is threaded at 24 to receive the adjusting set screw 25 which determines the position of the pin 20 with respect to the lugging disc. The set screw 26 holds the pin against rotation and by the adjusting of these set screws it seems obvious that the pin may be adjusted, located or turned end for end depending upon the position of the pin.

It will be observed that these pins are embedded for about one-half of the circumference of the pins in the bore 23 which extends into the flange portion 9 of the lugging disc.

In Fig. 6 the exposed portion 30 of the pin is that portion which creates the lug by moving in against the edge 31 of the wire so as to deform a portion of the edge in forming the lugs 6.

When the contacting portion 30 of the pin becomes worn then the loosening of the set screw 26 will permit turning of the pin to about one-half revolution so that an unworn surface will then be exposed to contact the wire. On the other hand when all of these surfaces at one end of the pin becomes worn then the pin may be removed and turned end for end in order to present an unworn surface. It will be apparent from the foregoing that at least four wearing surfaces may be utilized upon each pin. The pins can be made of a suitable material and heat treated as desired so as to obtain the maximum of wear.

The anvil disc 7 serves to hold the wire against displacement when the pins engage the edge of the wire in forming the lugs. The anvil disc, as will be apparent, overlaps what may be called a retaining disc 40 which is on the shaft 13 and abuts against the inner edge of the lugging disc. This retainer disc or means is of a size to extend radially about one-half of the width or diameter of the pin as can be best seen at 42 in Fig. 4. In this manner the pin is held against axial displacement and the depth or size of the lugs will be thus determined.

In Fig. 6 the die, or lugging disc 8, is shown as having the flange portion 9 made integral therewith as seen in the drawing, but it seems obvious that this flange 9 may be made as a separate disc if desired.

A construction showing the lugging discs and the associated parts made up in the form of separate plates or discs is illustrated in Figs. 9 through 12 inclusive. Fig. is the most illustrative Where the actual disc which carries the lugging pins is shown at 50 as having a plurality of openings 51 therein with the pins 20 disposed in the openings and projecting from one side of the disc 50.

The supporting flange portion 53 may be a portion of the disc 50 or it may be a separate disc if desired. This portion 53 abuts the lugging disc and has semicircular recesses therein to receive the inner half of each of the pins 20. This disc 53 is disposed upon the shaft 13 and if it is a separate disc it abuts against the lugging disc 50.

A retainer disc 54 of the same diameter as the support disc 53 fits against the disc 53 also on the shaft 13 but it does not have any of the recesses to receive the pins. The periphery thereof extends to about the center of the pins 20 and overlies the ends of the pins so as to hold them against any longitudinal slight movement out of the lugging disc 50.

A back-up disc 55 is also on the shaft 13 and is of the same diameter as the lugging disc so as to cover the ends of the pins which are exposed at the back of the lugging discs.

With the foregoing arrangement it seems obvious that the pins are so enclosed that they cannot move longitudinally in either direction and that they are capable of being turned about their own axis.

With this arrangement the pins can be turned so as to compensate for wear and it seems obvious too that as the wire moves along through the die and anvil construction that it may cause the pins to rotate as the wire is leaving the pin. In this manner all the surfaces of one end of the pin will become worn more or less uniformly. Only occasionally will it be necessary to disassemble the several discs and reverse the pin end for end. This may be done by loosening the back of disc 55 and sliding the pins outwardly whereupon they may be reversed.

Broadly the invention contemplates an arrangement of a die and an anvil disc wherein extensive service is obtained from the lugging pins and the lugging discs so that many thousands of feet of wire may be lugged as desired. The size and gauge of the lugs is dependent upon the size and shape of the pins 20 and it seems obvious that any desired size or shape may be employed.

What is claimed is:

1. A lugging roll comprising a first cylindrical body having a plurality of cylindrical holes therethrough with the axes of the holes parallel to the roll axis and with the hole axes at equal radial distances from the roll axis and with the holes circumferentially spaced around the roll axis, a second cylindrical body adjacent said first body and having peripheral grooves therein of cylindrical surface with the groove surfaces aligned with the surfaces of said holes, a cylindrical pin disposed in each of said holes and extending out into the adjacent groove, and

leans preventing axial movement of said pins.

2. The combination of claim 1 in which said pins are rotatable in said holes and grooves.

3. The combination of claim 2 with releasable means to prevent rotation of said pins in said holes and grooves.

4. The combination of claim 1 in which said means preventing axial movement of said pins comprises a first means closing the ends of said grooves opposite from said holes sufliciently to prevent passage of the pins out said ends of the grooves and second means closing the ends of said holes opposite from said grooves sufficiently to prevent passage of the pins out of said ends of the holes.

5. The combination of claim 4 in which said first means comprises a third cylindrical body adjacent said second body on the side thereof opposite from said first cylindrical body and having a diameter greater than the diameter between the inner edges of said grooves.

6. The combination of claim 5 in which said second means comprises a fourth cylindrical body adjacent said first cylindrical body on the side thereof opposite from said second cylindrical body and having a diameter greater than the diameter between the inner edges of said holes.

7. The combination of claim 5 in which said second means comprises a fourth cylindrical body adjacent said first cylindrical body and having a diameter greater than the diameter between the outer edges of said holes and said pins are rotatable in said holes and grooves.

8. The combination of claim 5 in which said second means comprises a screw thread in the end of each hole on the side of the first member opposite said second member and a threaded pin screwed into the threaded end of each of said holes.

9. The combination of claim 8 in which said pins are rotatable in said holes and grooves and there is a radial set screw in said first body in engagement with each pin to prevent rotation of the plug except when the set screw is released to allow adjustment of the position of the pin.

10. The combination of claim 1 in which each of said cylindrical pins has a coaxial bevelled surface on the end thereof farthest from said holes.

11. Apparatus for lugging wire comprising a pair of rotatably mounted cooperating anvil and die rolls shaped to define a channel between them that is closed on the faces nearest the axes of the anvil and die rolls and one transverse side and is open along one transverse side, said die roll having means including peripherally spaced dies thereon at the edge thereof nearest said open side to periodically reduce the distance between said faces of the channel along the edge thereof adjacent said open side as said rolls are turned, whereby wire fed through said rolls having the same cross section as the full channel will be entirely supported by the rolls except along said open side of the channel and will be periodically compressed as said rolls are turned so as to extrude lugs on the wire along the edge thereof that moves adjacent the open side of the channel, said die roll having a radially extending flange at one edge, said flange being adjacent to but spaced from said open side of said channel, said flange having a plurality of holes therethrough with their lengths parallel to the axis of said die roll, the holes being spaced at equal radial distances from said die roll axis and circumferentially spaced around the die roll axis, said die roll adjacent said flange having peripheral grooves therein aligned with the holes in said flange, each of said dies comprising a pin disposed in one of said holes and extending out into the adjacent groove, said grooves and pins extending only part way across said die r011 whereby the pins are prevented from moving axially along said grooves out of said holes, and means preventing axial movement of said pins in the opposite direction.

References Cited in the file of this patent UNITED STATES PATENTS Seymour June 26, Purdy May 26, Anderson Dec. 13, Getty Apr. 25, Moy et a1. Apr. 21, Getty July 7, Berkeley Nov. 30, Blecksmith Feb. 9, Brown Aug. 31, Kerruish Apr. 2, Whann Sept. 20, Renfrew Feb. 7, Greulich Aug. 10, Smith et a1 Mar. 31, Olivieri July 28,

FOREIGN PATENTS France May 23,

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