US1694402A - Long-stroke pumping jack - Google Patents

Description

Dec. 11, 1928. 7 1,694,402

H. J. SMITH LONG STROKE PUMPING JACK Filed July 14, 1926 2 Sheets-Sheet 1 .zwvmron. HUBER-T .1 SMITH.

H. J. SMITH LONG STROKE PUMPING JACK Dec. 11, 1928,

Filed July 14, 1926 2 Sheets-Sheet 2 I/VVf/V ran. Husmr J. SM/ 124.

,4 TTOIM/E y Patented Dec. 11, 19.28.

HE f5 raras HUBERT J. snrrn, or LONG canon, CALIFORNIA.

LUNG-STROKE Application filed July 14,

An object of my invention is to provide a long stroke pumping jack which may be readily and quickly removed when it is desired to work on the well.

Another object is to provide a simple and less expensive pumping jack and one which I is effective in operation.

Other objects, advantages, and features of invention may appear from the accompanying drawings, the subjoined detailed description and the appended claims.

In the drawings Fig. l is a side elevation of my invention.

Fig. 2 is an end View of the same.

Fig. 3 is a fragmentary side elevation, with parts broken away, of the drive shaft support.

Fig. 4 is an enlarged sectional view taken on line 44 of Fig. 1.

Referring more particularly to the drawings, my pumping jack comprises a drive shaft supporting frame 1 which is fixed to the floor of the derrick and which is positioned to one side and out of the way of the well casing 2. The cross head frame 3 is removably positioned adjacent the casing 2, and is not connected to the frame 1.

The frame 1 comprises two pair of angularly positioned legs 4, 5, which are secured together at their upper ends by the bolt 6. Bearings 7, 7 are secured to the upper ends of the legs 4, 5 and a drive shaft 8 is journaled in said bearings. The shaft 8 is rotated by means of a chain 9 which encircles a sprocket wheel 10 on said shaft and a sprocket wheel 11 on the band wheel 12 which wheel is driven by the usual engine (not shown). The legs 4, 5 rest in socket plates 13, 14 secured to the floor of the derrick, thus holding the frame 1 securely in position. A guy rope 15 may be secured to the top of the frame 1 to overcome the pull of the chain 9.

The cross head frame 3 comprises a pair of spaced channel bars 16, 17 in which the cross head 18 travels; said bars being secured together by cross ties 19-19. The frame 3 is supported and held upright on a pair of side legs 2020 and a rearwardly extending leg 21. Guy wires 2222 extend from the top of the frame 3 and are removably secured to the floor of the derrick by suitable means such as turn buckles 23. Guy wires 24, 24 extend from approximately the center of the frame 3 to further steady the same. These guy wires are also removably secured to the floor of the derrick 1n the same manner as preruivrrrne JACK.

1929. Serial No. 122,279.

viously described. It will therefore be seen that by removing the guy wires 22-24 the frame 3 'can be quickly shifted away from the well caslng 2, so that the well may be worked crank 11111125 is secured to one end -o'f-the shaft 8, and a connecting rod 26 is journaled on a pin 27 on said arm, and upon a pin 28 on the cross'head 18, whereby the cross head is reciprocated in the guides 16-17. A second crank arm 29 is secured to the end of the shaft 8 opposite the crank 25 and a pitman 30 extends from the arm 29 to a counter weight 31, said counter weight serving to. balance the weight of the sucker rods, fluids etc. in the well.

A pin 32 is provided on the cross head 18, and a hole 33 is provided therein through which the polish rod 34 extends. A clamp 35 on the rod 34 rests against the pin 32 when the rod is pulled upwardly and if an obstruction stops the rod on the downward movement it can readily slide through the hole 33.

It will be evident from the foregoing description that rotation of the crank 25 will reciprocate the cross head 18 and operate the pump in the well. made any length to give the stroke desired.

Having described my invention I claim:

1. A long stroke pumping jack for wells having a pump and rod comprising a supporting frame, a drive shaft journaled on said frame, a cross head frame removably positioned adjacent thewell and unattached to said supporting frame, a cross head reciprocally mounted in said crosshead frame, means coupling said cross head to the well pump rod, means to rotate said shaft, a crank arm on said shaft, a connecting rod joining said crankarm and cross head, a second arm on said shaft, a pitman depending from said sec-' ond arm and a counterweight secured to said pitman.

'2. A long stroke pumping jack for wells having a pump and rod, comprising a supporting frame formed of two pairs of angularly positioned legs, a drive shaft journaled on said frame, a cross-head frame removably positioned adjacent the well, legs supporting said cross head frame, a cross head reciprocally mounted in said'cross head. frame, a pin on said cross'head through which the pump rod extends, means to rotate said shaft, and means coupling said shaft and cross head whereby the cross head is reciprocated.

3. A long stroke pumping jack for wells The crank 25 may be til having a pump and rod, comprising a supporting frame formed of two pairs of angularly positioned legs, a drive shaft journaled on said frame, a cross-head frame removably whereby the cross head is recipiocated, guy

Wires reinovably secured to the cross head frame, and counter-balance means on said shaft. I

'4. A long stroke pumping jack for Wells having a pump and rod, comprising a supporting frame formed of two pairs of angularly positioned legs, a drive shaft journaled on said frame, a cross-head frame removably positioned adjacent the Well, legs supporting said cross head frame, a cross head reciprocally lnountedin said cross head frame, a pin on said cross head through Which the pump rod extends, means to rotate said shaft, and means coupling said shaft and cross head whereby the cross head is reciproeated, guy

Wires 'removably secured to the cross headframe, a second arm on said shaft, a pitman depending from said second arm and a counterweight secured to said pitman. V

In testimony whereof I afli x my signature.

HUBERT J. SMITH.

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