US2137853A - Polish rod - Google Patents

Description

J. D, NIXON POLISH ROD Nov. 22, 1938.

Filed Dec. l2, 1936 Jeddl D. Nixon Patented Nov. 22, 193s UNITED STATES Company Application December 12, 1936, Serial No. 115,494

(Cl. Z55-28) l or flared so as to form an outwardly extending v 6 Claims.

This invention relates to new and useful improvements in polish rods. y

One object of the invention is to provide an im-` proved polish rod device for use in wells and the like, particularly adaptedto sheath a worn or marred polish rod.

Anv important object of the invention is to provide means so arranged as to sheath or enclose the surface of a polish rod which has become `l0 worn or scarred, whereby` the working surface of the rod may be renewed or replaced in a simple, economical and expeditious manner.

Another object of the invention is to provide a" sheath or enclosure, adapted to be mounted on apolish or reciprocating rod, and made in tubular form and of such length that less material is required in its construction, than is necessary for a solid -polish-rod, whereby a considerable saving in material and cost is had.

A further object of the inventionds to provide means for fastening the sheath, or sleeve on a polish rod, whereby the sleeve may be readily secured to the rod at various elevations and adjusted longitudinally of said rod, as conditions may require.

A construction designed to carry out the lnvention will be hereinafter described, together with other features of the invention.

j The invention will be more readily understood from-a reading of the following specification and Aby reference to the 'accompanying drawing, in which an example of the invention is shown, and wherein:

Figure 1 is a view of a device constructed in accordance with the invention .and mounted in a well head, partly in section and partly in elevation;

Y Figure2 is an enlarged view of the device,

partly in section and partly in elevation;

i0 Figure 3 is a transverse, horizontal, sectional view taken on the line 33 of- Figure 2;

Figure 4 is a similar view taken on the line 4-4 of Figure 2; and

Figure 5 is a transverse, horizontal, sectional View taken on the une 5-5 of' Figure 2.

In the drawing, the numeral IIIv designates a polish rod which may be mounted in a string of sucker or pumping rods II for a well, or used for any other purpose for which it is adapted. 'An elongate sleeve or tube I2 is adapted to fit around or to enclose a portion oi theV polish rod. This sleeve may be formed of any-suitable material, such as stainless steel, brass, or Monel metal, and the like. The upper end of the sleeve is swaged PATENT OFFICE POLISH ROD Jeddy D. Nixon, Houston, Tex., assgnor, by mesne assignments, of fifty percent to Wilson Suopply vbecomes-Worn or marred, as by scores or pits,

rim or flange I3.

An annular housing or socket I4 has an axial bore I4 which receives the upper fend of the sleeve I2, as will be seen in Figures 2 and 5. 'a The 5 upper portion of the socket is counter-bored at IB and an inclinedshoulder or seat I5 is provided between said bores. The flared flange I3 rests or seats upon the shoulder I5, so as to support said sleeve II. Above the flange I3 and within the 10 bore I6, is mounted a suitable sealing or packingl ring I'l, preferably ofV soft4 metal or rubber. An annular, upwardly flared, follower ring I8 is mounted above the packing ring Il, and within the upper end of the bore IIi.4 l5

The upper end of the socket I4 is provided Wit external 'screw threads I9 for engaging with the internal screw threads 20 of the axial bore 22 of an annular head 2l. At the upper end of said bore, an inclined seat 23 is formed, as will be seen 20 in Figure 2. For fastening the head 2| and sock` et I4 to the sucker or other rod III, a plurality of arcuate gripping slips24 are positioned within said head. Attention is called to Figure.` 2, in which it will be noticed that the upper and lower 25 ends of the backs of ythe slips are inclined to coact with the inclined seat 23 and the flared inner surface I8 of the ring- I8. The inner face of each slip is provided with serrations or teeth 25 for gripping the rod Ill extending through said 30 slips. 'When the head 2l is rotated and the socket and sleeve held stationary, said socket will telescope the head, whereby the flared surface I8' and seat 23 will ride on the inclined ends of the slips, thus-causing the latter tc-gridthe rod 35 I0. When the gripping action is complete and the rotation continued, the ring I8 being held from moving upwardly by the slips, will distort the packing ring I'I, whereby the space between the upper end of the sleeve andthe socket will 40 be sealed. The parts which have been described constitute a clamp, whereby the sleeve may be readily fastened on the polish rod I0 at the desired elevation or point intermediate the ends of said rod. 45

When the working surface of a polish rod it will cut out packing and/or cause leaks. The practice has been to replace the rod, which is an expensive procedure. tion, it is. not necessary to replace the rod', but by simply removing one of the couplings and slipping the sleeve I I and clamp onto the old rod, a new working surface is provided. It will be necessary, however, to provide a larger stuil- 55 In using the invening box 36 to receive the s ieeve. It is pointed out that as the old rod is retained,the sleeve may be considerably shorter in length than the rod.

As the sleeve need only be long enough to provide a Working surface through the box 36, it will require greatly less material in structure than would be required for-a new rod, therefore the cost will be considerably reduced and a larger wearing surface will be had. It will be seen that by reason of the slips 2l and the screw threaded connection between the head 2| and socket I4, the clamp formed by these parts may be adjusted longitudinallyof the polish rod, thus enabling the proper positioning of the sleeve li. The sleeve extends down through the usual casing or tubing head 30, upon which the T 34 is mounted to support the stuffing box 36. The tubing 32 may be supported on slips 33 in the head or inany other suitable manner.

What I claim and desire to secure by Letters Patent is:

1. A polish device including, a guide sleeve, a socket on the end of the guide sleeve, ahead rotatably connected to said socket, gripping means within said head for securing said device onto a polish rod, and packing means within said socket arranged to be deformed by said gripping means for forming a fluid-tight seal between said sleeve and polish rod.

2. A polish device including, a guide sleeve for receiving a polish rod, a socket on the end of the sleeve, means for connecting said socket and sleeve together, a head rotatably connected to said socket, gripping means within said head for securing said device onto a polish rod, packing` means within said socket for forming a fluid seal between said sleeve and a polish rod, and

means within said socket and head for actuating the gripping means.

3. A polish rod device including, an elongate tubular member adapted to receive a polish rod member adapted to receive a polish rod and havl inga smooth outer surface for working through a stumng box, a clamp including, a socket on the upper end of the tubular member and supporting the same, gripping means for engaging a polish rod, and a rotatable head having screwthreaded connection with the socket for longi tudinally actuating the gripping means.

5. In a polish rod device, an elongate tubula member, adapted to receive a polish rod and having a smooth outer surface for working through a stuiiing box, a clamp including, a socket supporting the tubular member, gripping means for engaging a'polish rod, a rotatable head having screw-threaded connection with the socket for actuating the gripping means, and packing means for forming a fluid seal in the socket when forced into position by the rotation of said head.

6. A polish device including, a guide sleeve, a socket on the end of the guide sleeve, a head rotatably connected to said socket, gripping means within said head for securing said device onto a polish rod, packing means within said socket, and operating means arranged to be actuated by the gripping means for deforming said packing means, whereby a fluid-tight seal is formed in said socket.

JEDDY D. NIXON.

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