Title:
Oil well pump rod cleaner
United States Patent 2213923


Abstract:
This invention relates to an improved oil well pump rod cleaner. As is well known, the pump rods of oil wells become coated with paraffine as well as other deposits and as said rods are covered with oil, upon being withdrawn, it often proves not only a difficult undertaking but also an-extremely...



Inventors:
Clyde, Stuart
Lange, Perry L.
Neill, Gordon M.
Application Number:
US29141839A
Publication Date:
09/03/1940
Filing Date:
08/22/1939
Assignee:
Clyde, Stuart
Lange, Perry L.
Neill, Gordon M.
Primary Class:
Other Classes:
15/104.04, 15/236.06, 15/236.07, 134/6, 134/15, 144/208.7, 144/208.8, 166/81.1
International Classes:
E21B33/08
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Description:

This invention relates to an improved oil well pump rod cleaner.

As is well known, the pump rods of oil wells become coated with paraffine as well as other deposits and as said rods are covered with oil, upon being withdrawn, it often proves not only a difficult undertaking but also an-extremely greasy task to disconnect the sections of a rod from each other and dismantle the rod.

The present invention therefore seeks to provide a cleaner which will embody a compact and simply arranged mechanism through the medium of which a pump rod will be automatically cleaned as it is withdrawn from a well.

i5 A further object of the invention is to provide a cleaner embodying resilient scraping elements mounted to substantially encircle the pump rod and tensioned to scarify, loosen and scrape paraffine and other deposits from the rod.

Still another object of the invention is to provide a cleaner embodying an elastic wiper stretched to grip about the rod at a level above the scraping elements and adapted, as the rod is drawn upwardly, to shear the oil as well as any remaining flakes of paraffine or other loosened deposits from the rod for thus effectually cleaning the rod.

And the invention seeks, as a still further object, to provide a cleaner which will be of simple construction, which may be inexpensively manufactured, wh :h may be conveniently mounted about a pump rod and attached to the tubing of a well, and which will be entirely efficient in operation.

Other and incidental objects of the invention will appear during the course of the following description and in the drawings: Figure 1 is a perspective view showing our improved cleaner attached to a well tubing about a conventional pump rod.

Figure 2 is a horizontal section on the line 2-2 of Figure 1 and showing the manner in which the scraping elements employed encircle the pump rod.

Figure 3 is an elevation showing the sections of the casing of the cleaner in open position.

Figure 4 is a horizontal section on the line 4-4 of Figure 3.

In carrying the invention into effect, we employ a cylindrical casing which is formed of companion, mating sections 10 and 1.1, the casing being split longitudinally in a plane coincident with the axis thereof. Near its extremities, the casing is contracted to provide upper and lower coni6s cal ends 12 and 13 respectively, both of which are open, and formed on the lower end 13 is a nipple 14 while within said end of the casing is provided a short co-axial standp'pe 15 rising from the upper end of the nipple 14 but of somewhat less diameter. The mating halves of the nipple g 14 and standpipe 15 are, of course, carried by the respective sections 10 and II of the casing and, as will now be perceived, the standpipe defines a pocket 16 within the lower end 13 of the casing.

Communicating with the lower end of said pocket are spaced outlets I7, preferably two in each section of the casing.

Formed on the casing sections 10 and 11 at their rear edges are medially disposed mating hinge straps 18 connected by a suitable hinge 16 pin and formed on said sections at their forward edges are mating hand lugs 19 disposed opposite said straps. Fixed to one of these lugs, as seen in Figure 2 of the drawings, is a stud 20 removably received through a suitable opening in the other of said lugs and cooperating with the hinge pin to normally support the casing sections in registering relation.

Welded or otherwise fixed within the section 10 near the level of the lower edges of the hinge straps 18 is a semicircular bracket 21 reduced in thickness at its forward end portion to provide an arm 22 projecting beyond the forward edge of said section in conformity with the arc of the section. Suitably fixed within the casing section 11 near the rear edge thereof is a radial post 23 disposed on a level with the arm 22 and extending between said arm and post is a spring 24.

More or less closely above the level of the bracket 2 1, the casing section 11 is equipped with an identical bracket 25 having a curved arm 26 projecting beyond the forward edge of said section and suitably fixed within the casing section 10 near its rear edge is a post 21 like the post 23 and disposed on a level with said arm. Extending.between the arm 26 and the post 21 is a spring 28 like the spring 24. These two springs provide scraping elements as shall presently be explained.

Formed within the upper end 12 of the cleaner casing is a pair of spaced parallel annular flanges 29 and mounted by said flanges is an inverted conical elastic wiper 30 of rubber. At its upper larger end, the wiper is formed with a radial flange 31 firmly gripped by the flanges 20 therebetween while at the lower smaller end of the wiper is provided a reinforcing bead 32. As shown, the flanges 29 are, of course, carried half by the casing section 10 and half by the section 11 and this is also true of the wiper 30, the wiper &6 being formed of like semi-conical sections adapted to mate when the cleaner casing is closed.

In Figure 1 of the drawings, we have conventionally shown the upper end of a well tubing at 33 while a portion of a conventional pump rod is indicated at 34 and connecting the cleaner casing with the tubing is a coupling collar 35. To mount the cleaner about the pump rod 34, the sections 10 and II of the cleaner casing are first swung to open position when the springs 24 and 28 will extend fairly straight in crossed relation between the sections. The device is then manipulated to dispose the springs at the crotch therebetween against the rod, when the casing sections are swung to closed position about the rod. The collar 35 may then be screwed on the nipple 14 for locking the sections closed when said collar may be screwed over the well tubing 33.

As will be perceived, the springs 24 and 28 will, as the casing sections are closed, be flexed about the pump rod 34 to assume the position shown in Figure 2 of the drawings, each stretched about the rod in substantially U-shape. The portions of the springs engaging the rod will thus, combined, practically encircle the rod while the sections of the wiper 30 will be brought together about the rod so that the small end of said wiper will be distended more or less by the rod. The rod will, however, be freely received through the standpipe 15.

It will now be seen that as the pump rod 34 is drawn upwardly, those coils of the springs 24 and 28 in contact with the rod will be tensioned thereagainst to scarify, loosen and scrape parafflne and other deposits from the rod to fall into the pocket 16. At the same time, the wiper 30 will function, at a point above the springs, to shear oil as well as any remaining flakes of paraffine or other loosened deposits from the rod to collect within said pocket. The rod will thus be automatically and effectually cleaned as it is withdrawn from the well. The standpipe 15 will, of course, prevent the scrapings and oil in the pocket 16 from gaining entrance to the well tubing 33 while the openings 17 will serve to drain the pocket. As will be understood, the upper end of the casing will provide a landing or rest for the usual lifting tool or elevator for the pump rod.

Having thus described our invention, we claim: 1. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, and a scraping spring connected at its ends with the casing sections and when said sections are closed supported thereby in position flexed about the rod for scraping said rod as it is withdrawn from the well tubing.

2. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, and a scraping spring connected at its ends with the casing sections and when the sections are closed supported thereby in position flexed to substantially U-shape about the rod for scraping said rod as it is withdrawn from the well tubing.

3. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, and superposed scraping springs connected at their ends with the casing sections and r, when the sections are closed supported thereby in position flexed to substantially U-shape about opposite portions of the surface of the rod for scraping said rod as it is withdrawn from the well tubing. 4. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, a bracket fixed to one of said sections and provided with an arm projecting beyond the forward edge of said section, a post fixed to the other of said sections near the rear edge thereof, and a scraping spring extending between said arm and post and when the sections are closed supported thereby in position flexed about the rod for scraping said rod as it is withdrawn from the well tubing.

5. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, brackets fixed to the sections and provided with arms projecting beyond the forward edges of said sections, posts fixed to the sections near the rear edges thereof, and scraping springs extending between said arms and posts and when the sections are closed supported thereby in position flexed to substantially U-shape about the rod for scraping said rod as it is withdrawn from the 85 well tubing.

6. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing and provided at its lower end with a standpipe to receive the rod therethrough, said pipe defining a chamber at the lower portion of the casing and the casing being formed with a drain opening for said chamber, and a scraping spring connected with the casing sections and when the sections are closed supported thereby in position flexed about the rod for scraping deposits from the rod to fall into said chamber as the rod is withdrawn from the well tubing. 7. A pump rod cleaner for oil wells including a casing formed of companion sections adapted for attachment in closed mating relation to a well tubing to surround a pump rod projecting from said tubing, a scraping spring connected with the casing sections and when said sections are closed supported thereby in position flexed about the rod for scraping said rod as it is withdrawn from the well tubing, and a conical elastic wiper provided at its larger end with a flange secured to the casing sections and supporting the wiper to depend within the casing, portions of the wiper being carried by the casing sections and when said sections are closed mating about the rod at a point above said scraping element for shearing oil from the rod as the rod is withdrawn.

CLYDE STUART.

PERRY L. LANGE.

GORDON M. NEILL.