US1516891A - Swivel joint for sucker rods - Google Patents

Description

Nov. 25', 1924.

D. PRIDGEN SWIVELy JOINT FOR SUCKER RODS Filed Oct. ISO. 1923 2 Sheets-Sheet l V////,//////// vvuvvvhm// Snowdon lnah D. F11-Ld en No'v. 25, 19?@o 1,516,891

' J. D. PRIDGEN n SWIVEL JOINT FOR SUCKER'RODS Filed Oct. 30 1923 2 Sheets-Sheet 2 Patented Nov. 25', 1924.

UNITED STATESy JOSIH DAVID PBIDGEN, 0F SMACXOVEB, ARKANSAS.

SWIVEL JOINT FOB SUCKEB RODS.

Applica. u ctober 30, 1923. Seria] I0. 071,741.

To all whom. t may concern:

Be it known that I, JosiAH D. PRmGnN, a citizen of the United States, Smackover, in the county of Union and State of Arkansas, have invented certain new and useful Improvements in a Swivel Joint for Sucker Rods, of which the followin is a specification.

he present invention relates to oil well pumps and more particularly to the construction of a sucker rod joint or connection.

An object of the (present invention is to provide an improve joint for sucker rods wherein one, two, three or'more may be used in string or chain fashion according to the depth of the well and the alignment of the hole or opening.

Another object of the invention is to provide a connection of this type which forms a swivel so that the sections of the sucker rod may freely and relatively turn one upon the other while in motion and thus prevent the rods and other parts from wearing Hat sided and to prevent the rods and boxes from wearing holes in the tubing as is often the case when the well hole is crooked.

A further object' of the invention is to provide a swivel connection of this type which mayv be easily and quickly repaired and wherein the parts may be renewed and replaced in a relatively short space of time.

The above and various other objects and advanta es of this invention will in part be describe in and inl part be understood from the following detailed description of the present preferred embodiment, the same being illustrated in the accompanying drawingz wherein: u

ig. lis a slde elevation of a portion of a sucker rod constructed according to the present invention.

Fig. 2 is a longitudinal section taken through the same axially at right angles to the showing in Fig. 1.

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2.

Fig. 4 is a similar view taken on the line 4-4 of Fig. 2.

Fig. 5 is a transverse section taken through the lower end of the coupling on the line 5--5 in Fig. 2.

Fig. 6 is a view similar to Fig. 1, showing a modification.

Fig. 7 is a longitudinal section taken through the same axially at right angles to the showing in Fig. 6.

residing at Referring to the drawing 10 designates the lower portion of a sucker rod which is adapted to be connected to the upper portion 11 of thev sucker rod. The lower portion 10 terminates at its upper end in an externally threaded stem 12.adapted to engage in a threaded socket 13 formed in the lower end of a couplin member 14. The memberl 14 has depressions 15 in o posite sides adapted to receive a wrench or t e like f for lscrewln the member 14 relativelyto the stem 12. he upper end of the coupling member 14 is provided with a recess 16 in which is seated the head 17 of a bolt 18, the latter being externally threaded throughout its length. The member 14 has a depression in its outer end with internal screw threads and a collar 19 is threaded into the socket 16 and against the head 17A of the bolt. The collar 19 is turned down against the head 17 to the desired extent, the collar 19 having a bevelled lower edge and the head 17 being correspondingly bevelled to meet the surface of the ring 19 for holding the threaded bolt 18 in place and permitting the free turning of the latter.

The sleeve 19 has Spanner openings 20 therein for facilitating the application of a spanner wrench to the ring and turning the same down upon the head 17 to the desired extent. A set screw 21 is threaded into the side of the coupling member 14 to hold the ring when adjusted. The lower section 10 of the sucker rod is provided with a collar 22 adapted to bind against the lower end of the coupling section 14 for locking the latter to the sucker rod.

A second coupling section 23 of sleeve form is internally threaded and mounted on the stem 18 and turned down thereon into position against the upper end of the coupling section 14, care being taken netto bind the parts against relative turning movement. A collar 24 is also threaded upon the stem 18 and is adapted to be turneddown against the sleeve 23 to bind thelatter on the stem when adjusted, and a set'screw 25 is threaded in the collar to bind against the stem 18 and hold the collar free om turning. The upper sucker rod section 11 is provided with an internally threaded head 26 adapted to be Y parts. l

The' upper coupling section 23 is provided in oppositesides with depressions or transverse fiat faces 27 for receiving a wrench or the like to facilitate the turning of the section.

It is apparent that the swivel head 17 ermits the relative turning of the coup l1n sections 14 and 23 under all conditions an that the'coupling maybe used with the ordinary type of sucker rod and may simply be introduced between the stem 12 and the hollow head 26 of the sucker rod'.

Accordin to the modification shown in Figs. 6 an `7, the coupling section 28 has been lengthened to include at its upper end a threaded recess 29 for the reception of the lower threaded end portion or stub 31 of the upper rod member 30. The upper4 section 30 of the suckerurod vis provided with a flange 32 adapted to bind against the upper end of coupllng section 28 for locking the latter to the sucker rod. f

The coupling section 28 is provided with a set screw 33 threaded in its side wall and located a suiiicient distance from the upper end ofthe couplin section 28 to bind against the stem 18 and ho d the collar from turning thereon. .j

The lower portions of this modified form are of similar construction to the lower portions of the swiveljoint shown by Figs. 1 to 5 inclusive.

It is of course understood that various changes and modifications may be made in thedetails of construction and design of the above specific embodiment without departing from the spiritthereof, such changes and modifications' being restricted only by the scope ofthe following claims.

What is claimed is:

1. In combination with a sucker rod having a threaded stem'on one section and a threaded head on the other section, a pair of coupling members, vone of said members having a threaded socket' to receive said stem of the rod section and having a threaded socket in its otherfend. a threaded stem having a swivel head adapted to turn in said second socket of the coupling member a retaining ring threaded in said second socket and against the head for holdin the latter in the socket and permitting the ead Y to turn, said other coupling member being recess in the upper end, an upper sectiony having a threaded recess therethrough, a threaded bolt having an enlarged head at its lower end and being `adapted to project through and beyond said upper section, aA

ring threaded in said recess in said lower section and adapted to engage said enlarged head of said bolt to retain the same in place, and means for securing the upper and lower sections to said sucker rod.

3. The combination with a pair of vsucker rod sections having a stem and thel other having a socket, a pair of swivelled sections arranged to turn one upon the other and including a swivel bolt projecting beyond one of the swivel sections, the projecting end of the bolt being ada ted for engagement in the socket of oneo vsaid sucker Y rod sections.

4. The combination with a pair of suckerYK swivel section and having a threaded portion extending beyond the adjacent swivel section, means for locking the swivel headk in its section and locking the other swivel section upon the threaded stem, the projecting end of said stem being adapted to engage with the other rod section.

JOSIAH DAVID PRIDGEN.

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