US2373081A - Pump rod extracting device - Google Patents

Description

April 3, 1945. H.` P. sALvERDA 2,373,081

PUMP ROD EXTRACTING DEVICE Filed Nov. 2e, 1941 2 sheets-sheet 1 if m Il /l l/ fl 1li/.f

Aprll 3, 1945. H. P. SALVERDA PUMP ROD EXTRACTING DEVICE Filed Nov. 26, 1941 2 Sheets-Sheet 2 RNEY Patented Apr. 3, 1945 PUMP ROD- EXTRACTING DEVICE Henry ll. Salvcrda, Daytons Bluff Station,y Minn.,

assigner of one-half to Frank J. McCarron and Alice McCarron Loftus, Daytons Bluff Station,

Application November 26, 1941, Serial No. 420,529

5 Claims.

My invention relates to an improvement in pump rod extractingV device, wherein it is desired to provide an apparatus capable of removing broken plungers of pumps and the like.

I have found that when they are in constant use, the pump rods or plunger rods of pumps occassionally become brokenl It is extremely difficult to extract the lower end of the broken rod together with the plunger. Often the rod becomes broken many feet below the surface of the ground and without pulling out the entire pipe casing, it is difficult to grasp the plunger rod to extract the same.

It is the object of .my invention to provide a device which may be inserted into the plunger casing and which may extend thereinto to any desired depth. This device will embrace the upper end of the broken portion of the pump rod and will engage the same `so that the plunger and broken pump rod end may be extracted.

A feature of the present invention lies in the provision of a device which is designed to fit within the well casing and which slides downwardly therein until it comes in contact with the upper end of the broken-01T pump or plunger rod. The device will guide the broken end of the plunger into my extracting device and into position where the plunger rod is firmly gripped.

It is an object of the present invention to provide a substantially hollow cylindrical shell or sleeve at the lower end of the extracting device so as to guide the broken end of the pump rod between a series of gripping means. When the broken end of the pump rod is between the gripping means, these means act to grip the rod so that the plunger and broken end of the pump rod may be extracted from the well casing together with the extracting device.

A feature of the present invention resides in the provision of a trigger device which acts to operate the gripping means when the pump rod is in proper position. This trigger means is so arranged as to be actuated by the broken end of the pump rod itself, and the construction is such that the pump rod must be in position between the gripping means before the trigger is actuated.

Thus the pump rod must be in position to be gripped before the gripping meansmay take effect and proper operation of the device is insured. v

A feature of my invention resides in the fact that the device may be very easily accommodated for a pump casing of any desired size. l It is desirable to have the sleeve at the lower end of the gripping device of proper size to t within pump rod is round or square and will effectively grip the same for extraction purposes.

These and other objects and novel features of my invention will be more clearly and fully set forth in the following specification and claims.

In the drawings forming a partkof my specification:

Figure 1 is a longitudinal section through a pipe well casing showing my extracting device positioned therein.

Figure 2 is a longitudinal section through the upper portion of the extracting device in the position that the parts would assume as the extractor was inserted into the well casing.

Figure 3 is a View similar to Figure 2 showing the parts of the extractor in the position they would assume when the pump rod was being gripped for extraction purposes.

Figure 4 is a side elevation View of a portion of the upper part of the extractor, a portion of the casing thereof being broken away.

Figure 5 is a view similar to Figure 4 `showing the elements in a different relative position.

Figure 6 is a cross-sectional view through the extractor casing, the position of the section being indicated by the line 6-6 of Figure 4.

Figure 7 is a longitudinalsection through the lower portion of the extractor.

Figure 8 is another longitudinal sction through the lower portion of the extractor, the section of Figure 8 being taken on a plane at right angles to that of Figure 7.

Figure 9 is a vertical section similar to Figure 7 showing the relationship of the parts when the pump rod is being gripped for extraction purposes.

The well may be of any desired type and is usually provided with an outer` cylindrical casing l0 which may be of pipe or other suitable material. A pump rod Il is reciprocable within the pipe l0 and usually supports a plunger or piston at the bottom end thereof. From time to time these pump rods'or plungers become broken in use and it becomes necessary to extract the portion remaining in the pipe casing, after the attached part at the top of the casing has been removed. It is for this purpose that the extracting device A has been designed.

The extracting device indicated in general by the numeral A is supported by means of a pipe or rod I2 which may be formed in sections so that any desired number of sections may be added to lower the extractor A to the proper depth. The rod or tube I2 is secured through av reducer or reducing coupling I3 to the upper hollow'cylindrical-body I4 as best shown in Figures 1, 2, and 3 of the drawings. This upper hollow body I4 may be of any desired diameter but is preferably of a diameter which will readily fit within the pump casing I0.

Within the body I4, I provide a partition I5 which forms a bearing for a slidable rod I6. This rod I6 is provided with a notch I1 therein so shaped that it may be retained in elevated position by a. trigger arm I9. The trigger arm I9 is pivoted at 2U to the partition I5 and is biased toward the rod I6 by a spring 2I. The spring 2l draws the trigger arm I 9 into the notch I'I, and as long as the trigger is in engagement therewith, the rod I6 is held in the elevated po-I sition illustrated in Figure 2 of the drawings. As soon as the trigger I9 is releasedfrom the notch I1, however, the rod I6 will slide downwardly as will be later described.

A trigger rod 22 is provided to release the trigger I3. This trigger rod 22 is provided with a wedge-shaped end 23 vthereupon which engages the trigger I9 and pivots the same out of the notch i1. With special reference to Figures 4 and 6, it will be noted that as the trigger rod :r

22 is elevated so that the cam 23 moves upwardly from the position shown in Figure 4, the cam surface 24 will engage against the trigger I9 and swing it in a counter-clockwise position into the position shown in dotted outline in Figure 6 of the drawings.

The lower end of the slidable rod I6 is bolted to the closed end 25 `of an inverted U-shaped bracket 2li. This bracket 2S is provided with downwardly extending bracket arms 21 which extend within a sleeve 29 and are secured there- 4 to. Thus as the rod I6 slides downwardly through the partition I5, the sleeve 29 slides downwardly with respect to the body portion I4.

A sleeve 3S is secured by arms 3l to the body i4. These arms 3l are secured by bolts or rivets 32 to the sleeve 3G and are secured by bolts 33, or other suitable means, to the body I4. Thus the sleeve 39 is held in definite fixed relation to the body i4, while the sleeve 29 is slidable toward or away from the sleeve 30. The lower end of the sleeve 30 is usually beveled as illustrated at 34, so that a pump rod within the cas,- ing IIJ can be' readily guided into the sleeve 39.

A. pair of gripping arms are'pivotally secured by hinges 39 to the upper extremity of the sleeve 3G. These gripping arms 35 are preferably provided with teeth 31 so as to present a gripping surface to the pump rod I-I. In case the pump rod is formed of wood or similar material, these teeth may bite into the body of-the pump rod so as to grip the same with a hold which can not be broken without splitting the material forming the rod.

The outer surfaces of the gripping arms 35 are so shaped as to be forced inwardly when the sleeve 29 is moved toward the sleeve 3U. From an examination of Figures '7 and 9, it will be apparent that as thesleeve 29 moves downwardli7 the inner surface of this sleeve engages the outer surface of the gripping arms 35, urging them inwardly into contact with the pump rod I I. Thus as the sleeves 29 and 3U are moved together the pump rod within the sleeves is rmly grasped by the arms 35.

Extending between the opposed'arms 3|, I provide a connecting member or partition 39. The lower end of the trigger rod 22 extends through this partition 39 and an enlarged disc or pressure plate 4l) is secured to the lower end of the trigger arm 22. A shoulder 4I, such as a nut threaded upon the trigger arm'provides a stop to limit downward movement of the trigger arm 22. A spring 42 is positioned between the plate 40 and the partition 39 so as to urge the trigger arm 22 in its lower extreme position. A pair of springs 43 are provided within the upper body member I4 so as to urge the rod I6 into its lower extreme position. The lower ends of the springs 43 are secured at 44 to the casing or body I4, and thelupper ends of these springs are secured to a cross member 45 which is secured to the lower end of the rod I6. In actual practice the. cross member 45 may, if desired, be eliminated and the springs 43 may be connected directly to the closed end 25 of the U-shaped bracket 2B. In any event the springs 43 however positioned are designed to move the bracket 26 downwardly, thereby sliding the sleeve 29 toward the sleeve 30.

In operation the sleeve 29-is manually pulled upwardly away from the sleeve 30, thus sliding the rod I6 upwardly through the partition I5. When the notch I1 comes into registry with the trigger I9 this trigger engages into the notch, being drawn into engaging position by its spring 2|.

The extractor may then be inserted into the well casing Ill-and sections of rod or pipe I2 may be added to form a sufficient length to lower the extractor into engagement with the broken portion of the pump rod. When the extractor comes into contact with the pump rod this rod extends into the casing, extending through the sleeves 29 and 30 until the upper extreme end thereof `contacts the plate 4l). Further downward movement of the extractor A will cause the pump rod II to compress' the spring 42 and raise the trigger rod 22. In raising the trigger rod 22 the wedgeshaped cam 23 is raised, the cam edge 24 thereof engaging against the trigger I9 to pivot the same out of engagement with the notch I1. When the trigger I9 has been entirely released from the notch I1, the rod IIS-will drop, as it is a part of the bracket 26 which is urged downwardly by the springs 43.

Downward movement of the bracket 26 causes relative downward movement of the sleeve 29, thus moving the sleeves 29 and 3i] relatively together. As the sleeve 29 moves toward the sleeve 3U the arms 35 are pressed inwardly against the pump rod II and thus the pump rod is rrnly gripped and locked from outward movement.

I have found in actual tests that my pump rod extracting device will engage the broken end of a pump rod with suicient rmness to permit extraction of the same from an extreme depth. It is obvious that nothing may readily trip the trigger of myv device with the exception of a member entering through sleeves 29 and 30, as the major portion of the sides of the extractor are closed by the side members 21 of the bracket 25 and by the arms 3I which support the sleeve 30.

Inorder that my extractor may operate suc-A cessfully on different wells and the like, it is possible to either change the size of the entire device `or to change the size of the lower end of the device. By unscrewing the reducing coupling I3 the entire extractor A may be removed from the pipe I2 and this extractor may be replaced by another of larger diameter having a suitable reducing coupling to iit the threads of the pipe l2. On the other hand if it is so desired the bolts 33 may be removed and the lower end of the extractor comprising the shells 29 and 30 and the bracket arms 3l may be replaced. In such an instance it is well to have the arms 3| of the larger size of extractor bent outwardly below the position of the plate 4U.

In accordance with the patent statutes I have described the principles of construction and op eration of my pumprod extracting device, and while I have endeavored to set forth the best embodiments thereof, I desire to have it understood that obvious changes may be made within the scope of the following claims without departing from the spirit of my invention.

I claim:

1. An extracting device for pump rods in combination with an elongated tubular pump housing, comprising a, sleeve designed to fit within said elongated housing, a hollow body member secured to said sleeveand held in spaced relation thereto. a series of gripping means secured to said sleeve, a second sleeve slidable with respect to said first sleeve and operable in one position to engage said gripping means and to force the same into contact with said pump rod, spring means urging said second sleeve into engagement with said gripping means, a trigger means holding said spring means from moving said second sleeve,and means actuated by the pump rod and `engageable with said trigger means to release said second sleeve to engage said gripping means.

2. An extracting device for a pump rod in combination with an elongated tubular casing enclosing the pump rod, said device comprising an elongated body, ahollow sleeve supported by said body and designed to embrace the pump rod, gripping means secured to said sleeve, a second sleeve movable toward and away from said first named sleeve and operable in one position to move said gripping means into contact with said pump rod, resilient means urging said second sleeve into engagement with said gripping means, trigger means holding said sleevejin nonengaging position, cam means for actuating said trigger means, and means operated by said pump rod to actuate said cam means to release said trigger. i "3. An extracting device for pump rods en closed within an elongated casing, said device comprising a sleeve into which the pump rod may extend, rod gripping Ameans secured to said sleeve, asecond sleeve engaging said gripping means tojmove the same into contact with said p 'u'mp rod, resilient means for sliding said secondsleeve, a, trigger for holding said resilient meansfrom movement, cam means for releasing said trigger i means, pump rod actuated means secured to said cam means for actuating the same, and supporting means for said device whereby said device may be dropped into an elongated lcasing into contact with said pump rod.

4. An extracting device for pumpingrods enclosed Within #an elongated casing, saiddevice `comprisingr a sleeve into which the pump rrod closed within an elongated casing, saidfdvice comprising a sleeve into which the pump rod may extend, rod gripping means pivotally secured at the lower extremity to said sleeve, a second sleeve engaging said gripping means to move the same into contact with said pump rod upon movement toward said rst sleeve, resilient means for sliding said second sleeve, a trigger for holding said resilient means from movement, land means engageable with the pump rod when the pump rod is positioned within said sleeves to operate said trigger.

HENRY P. SALVERDA.

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