US2278399A - Pumping mechanism - Google Patents

Description

c. E.' BRmwELL 2,278,399 Pun/WINGv MECHANISM Filed Jan, 2, 1940 March 3l, 1942.

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f/AAAA Patented Mar. 31, 1942 UNITED vSTATES `PTENT OFFICE g PUMIING MECHANISM Chalon E. Bridwell, Detroit, Mich.

Application January 2, 1940, Serial No. 311,994 1s Claims, (c1. 10s-18o) VMy invention relates to a new anduseful improvement in a pumpingy mechanismy adapted primarily for use in. pumpingA from deep wells such as oil wells or the like. In this type of pump I use a reciprocating barrel operating overa stationary plunger anchored at the bottom end. In

the reciprocating barrel I have provided a yloose n slidable valve of a sleeve-like natureadapted for moving to closed position-on the lifting stroke. In they barrel I alsoprovide an axially movable valve carried by a stationary part and' movable axially relative thereto within predetermined limits. n

It is an object of the presentr invention to provide in this last-namedvalvea4 construction whereby the engagement of the valvewith the A.end of the plunger will -form a seal, 4the end of the plunger serving as a valve seat.

Another object of the invention .is the pro-v vision of'a construction whereby the valve, in addition to being axially movable, may also slightly rotate so that when reseating on theseat it does not engage in the same relative position.

Another object oi theinvention is-,the .pro-

vision in a pumping mechanism of this. class. of Y a valve axially movable within predetermined limits providedwith a guide engageablefwith .the

inner surfacefof the reciproca-tingv barrel so that the valve is maintained centered at all times and the engagement of the guide portion of thevalve with the inner surface of the reciprocating barrel is not required to actas a sealing valve.

-Another object of. the invention is to provision in a pumping mechanism. of this type` of a loosely mounted valve in the. lower end of thestationary plunger. v

Another obj ct of the invention is the provisionin a pumping mechanism of.- a structure vwhereby the valve cage may he eliminatedand Fig. l is a longitudinal centralsectional view of part of the invention.

Fig. 2 is a central, longitudinal, sectional view loosely positioned sleeve valve 25'.

of the part of the invention forming a continuance of the part shown in Fig. l with intermediate parts broken away,

Fig. 3 is a longitudinal sectional View of the inventionwith parts broken away and forming a continuance-of the part shown in Fig. 2 with intermediate parts removed, v

Fig. '4 is a fragmentary, central, longitudinal sectional view of the invention forming a continuance of the party shown in Fig. 3 with an intermediate portion removed',l

Fig. 5 is a sectional view taken on line 5-5 oi Fig. 3, f

Fig. 6 is a sectional view taken on line 6-6 of Fig. 3,. f

Fig. 7 is a fragmentary central longitudinal sectional view of a modified form of the invention,

vwell to the top thereof, Aand serving as the conduit for conveying the pump liquid from the vbottom of the Well to the top. This tube, of

course, is stationary. Extending downwardly from the top of the well interiorly of the tubing v is a sucker rod which is adapted tov be attached by a suitable connection tothe threaded end I0 oi the guide rod which is provided with a hexagonal'portion II against which the lock nut I3 lis threaded. This hexagonal portion projects through the scored rend I2 oa top adapter I4 which is of sleeve-like construction and threaded at its lower end to the upper end of the upper barrel tube I5. Below the hexagonal portion II of the guide rod is an enlargement I6 which engages the inner surface of the adapter'l4 and which Von the. upper stroke contacts the shoulder I1 formed on the adapter so that on the upper stroke after the enlargement I6 engages the shoulder Il, the adapter will travel upwardly in unison withthe sucker rod. The adapter is provided with openings I8 through which liquid may iiow into the interior of the tubi-ng 9. The lower end of the guide rod is threadedas at I9 into a wardly from the valve seat forming head 23.

yThe sleeve 2l) forms a part of the tube 24, which may be termed a stop tube, for engaging the Openings 26 are formed in the stop tube 24. Projecting downwardly from the valve head 23 is a tubular body having openings 25 formed therein and provided with the enlarged terminal guide portion 26 which engages against the inner face 21 of the upper barrel I in a slide t. This upper barrel I5 is threaded to one end of a coupling 28 which has a bore 29 formed therethrough. The lower end of this coupling 28 is threaded to the upper end of the lower barrel tube 36. The lower end of this barrel tube 36 is threaded onto the upper end of a sleeve 3| which may be termed a barrel tube pull nut. Slidable in the barrel section is a guide section 32 which is formed in the nature of a tube and adapted to engage against the inner surface 33 of the barrel section 33 by a slidable t but not by such a close fit as to form a liquid seal. A reduced portion 34 extends outwardly from the lower end of the member 32 and is provided with lateral openings 35. This reduced portion terminates in a head 36, the face 31 of which serves as a valve when engaging against the end face 38 of the plunger 39. This plunger is stationary, as will appear from the description which follows. Projecting outwardly from the head 36 centrally thereof is a rod 46, the lower end of which is provided with an axially extending elongated slot 4I through which extends a pin 42 which is carried by and extends diametrically of the plunger 39. The slot 4I is of greater width than the outside diameter of the pin 42 so that a rotation 0f the guide section 32 of the valve head 36 within predetermined limits may take place.

The lower end of the plunger is threaded onto y the upper end of a pull tube fitting 43. Threaded into the lower end of this fitting 43 is a pull tube 44 which threads at its lower end into the threaded bore of a pull tube nut 45. Threaded onto the end of this pull tube nut 45 is a valve cage 46, the lower'end of which threads onto an anchor shoe adapter 41 which is provided with thetapered end 48 engaging in the tapered seat 49 of the anchor shoe 50. This anchor shoe 50 is connected by the anchor shoe coupling 5I to the tubing 9. Threaded into the lower end of the anchor shoe is a strainer tube 52 having openings 53 formed therein. Carried by the lower end of the anchor shoe adapter 41 is the gas separator tube 54.

Projecting downwardly from the pull tube nut 45 centrally thereof is a valve guide rod 55 which has a socket 56 formed in its lower end for receptionA of a stem 51 projecting upwardly from the valve head 58. This valve head 58 is adapted to engage the face 59 of the valve sleeve 60 which is held in position on the upper end of the anchor shoe adapter 41, by means of the valve cage 46.

The inner face of the upper end of the topy nut 45. This nut being stationary and the lugs 66 engaging in the notches 65 will prevent any rotation of the barrel tubes and connected parts.

In operation, when the guide rod is pulled upwardly enlargement I6 will engage the shoulder `tion is effected between these parts.

I1 as shown in the drawings, and further continued upward movement will move the parts I4, I5, 30, and 3| upwardly, and in such upward movement the member 23 will engage the end of the sleeve valve 25 so that a leak-proof connec- Continued upward movement then Will effect a suction in the movable barrel sections below the valve head 23. This will cause the valve head 58 to move off its seat as shown in the drawings. Simultaneously, the valve face 31 will move out of engagement with the valve face 38 and liquid will pass upwardly through the tube 54 into the interior of the cage 46 through the pull tube 44 and through the plunger 39 outwardly through the bore 38 around the head 36 and into the interior of the member 32 through the openings 35.

On the down stroke the valve head 58 will move onto its seat by gravity or by the force of the liquid above. The valve face 31 will engage the valveface 38 and the valve 25 will move olf its seat to allow the liquid to pass above. It will be noted that the engagement of the valve faces 31 and 38 effects a leak-proof seal through the engagement of but a pair of cooperating parts, one of these parts being the upper end of the plunger. It will also be noted that a slight relative rotation of these faces may take place to assure a tight sealing. Experience has shown that this type of aseal is most eiiicient and is subjected to a minimum amountof wear, eliminating the necessity of pulling the pump for valve changes. It will thus be seen that I have provided a stationary plunger with -reciprocating barrel tubes and have utilized a minimum number of parts to provide a seal productive of the results mentioned. It will be noted that one of the sealing parts of the valve Lis 4movable while the other is stationary relatively to the stationary plunger. This type ofy valve control is most eilicient where a quantity of sand is lbeing pumped with the liquid.

In the structure shown in Fig. 1, the valve head 36 is permitted buta slight rotation. The structure shown in Fig. 4 differs in this regard from the structure illustrated in Fig. 1. In Fig. 1 the pin 42 limits thek axial movement of the head 36 relatively to the plunger 39. In the form shown in Fig. 4, the plunger 39' is provided with an extension 61 which is threaded thereon to provide an internal shoulder 68 on the plunger 39. A guide sleeve 3,2v is provided with the reduced portion 34 having the openings 35 formed therein,-

this reducedportion terminating in the elongated head 36', the end face 31 of which forms a valve facing to engage the end face 38' of the extension 61. Formed in the end of the head 36 is a socket 68 in which is inserted one end 69 of a stem 40 which may be secured to the head 35 in any suitable manner `but which is illustrated secured thereto by means of the pin 10. Formed on the end of the rod 40 is a head 1I which is of larger outside diameter than the inside diameter of the extension 61 so that this head may engage against the shoulder ,68 and thus limit axial movement of the valve mechanism while the valve mechanism ispermitted to freely rotate an entire revolution. The same advantages recited concerning the structure of Fig` 1 are also present in the structure. shown in Fig. 4.

What I claim is:

1. In a pumping mechanism of the class described, a stationary tubular plunger; a reciprocating tube embracing said plunger; means for reciprocating said tube, one end of said plunger providing a valve seat; a valve head in said tube havinga valve seat engageable with the valve seat on said plunger end; a tubular guidel member extending from said valve head and engaging in said reciprocating tube in a slide fit, there being lateral openings formed in said tubular guide member intermediate its ends.

2. In a pumping mechanism of the class described, a stationary tubular plunger; a reciprocating tube embracing saidplunger; means for reciprocating saidI tube, one end of said plunger providing a valve seat; a valve head in said'tube having a valve seat engageable with the valve seat on said plunger end; a tubular guide member extending from said valve head and engaging in said reciprocatingtube in a slide t, there being lateral openings formed in said tubular guide member intermediate its ends; and means for limiting the rotation of said valve head beyond a predetermined degree.

3. In a pumping mechanism of the class described, a stationary tubular plunger; a reciprocating tube embracing said plunger; means for reciprocating said tube, o-ne end of said plunger providing a valve seat; a valve head in said tube having a valve seat engageable with the valve seat on said plunger end; a tubular guide member extending from said valve head and engaging in said reciprocating tube in a slide fit, there being lateral openings formed in said tubular guide member intermediate its ends; means for limiting the rotation of said valve head beyond a predetermined degree, said Valve head being axially movable relative to said plunger, and means for limiting the axial movement of said valve head relatively to said plunger in one direction beyond a predetermined distance.

4. In a pumping mechanism of the class described, a stationary tubular plunger; a tubular member embracing said plunger and reciprocable relative thereto axially thereof, said plunger being tubular; a tubular sleeve positioned in said tubular member and engaging therein in a slide fit and movable axially relative thereto; a head on one end of said tubular sleeve for closing said end, the outer face of said head providing a valve and adapted to engage 'against the end of said plunger and close the passage therethrough, said tubular sleeve having lateral openings formed therein between its open end and its closed end.

5. In a pumping mechanism of the class described, a stationary tubular plunger; a tubular member embracing said plunger and reciprocable relative thereto axially thereof, said plunger being tubular; a tubular sleeve positioned in said f tubular member and engaging therein in a slide fit and movable axially relative thereto; a head on one end of said tubular sleeve for closing said end, the outer face of said head providing a valve and adapted to engage against the end of said plunger and close the passage therethrough, said tubular sleeve having lateral openings formed therein between its open end and its closed end; a rod extending from the outer face of said head and provided With an elongated slot; and means carried by said plunger and engaging in said slot for limiting rotating and axial movement of said head beyond a predetermined degree.

6. In a pumping mechanism of the class described, a stationary tubular plunger; a. reciprocating tubular member embracing said plunger and movable longitudinally thereof; a tubular guide sleeve positioned in said tubular member in a slide iit and movable axially thereof; a head closing one end of said sleeve, said sleeve having lateral openings vformed therein intermediate said .head1v andf the open endof said sleeve, said plunger having a central passage formed therethrough, said head being engageable with the end of said plunger for closing one end of said passage; means extending from said head into said plunger; and means on said plunger engageable with` said extending means for limiting axial movement of said sleeve relatively to said plunger beyond a predetermined distance.

7. In a pumping mechanism of the class described, a stationary tubular plunger; a reciproeating tubular member embracing said plunger and movable longitudinally thereof; a tubular guide sleeve positioned in said tubular member in a slide fit and movable axially thereof; a head closing one endy of said sleevey said sleeve having,r lateral. openings formed therein intermediate said head and the openv end of said sleeve, said plunger having a central passage formed therethrough, said head being engageable with the end of said plunger for closing one endl of said passage; means extendingfrom said head into said plunger; and means on said plunger engageable with said extending means for limiting axial movement of said sleeve relatively to said plunger beyond a predetermined distance and for limiting rotative movement of said sleeve relatively to said plunger beyond a predetermined degree. 8. In a pumping mechanism of the class described, a stationary vertically directed plunger having a central passage formed therein, the face of the upper end of said plunger providing a valve seat; a reciprocating tubular member embracing said plunger in snug relation and slidable axially thereof; a tubular guide sleeve in said tubular member and engaging the same in a slide fit and movable axially thereof; a head for closing one end of said guide'sleeve, said guide sleeve having openings formed ltherein intermediate its open end and its closed end, the outer face of said head being engageable with said valve seat for closing the passage through said plunger.

9. In a pumping mechanism of the class described, a stationary vertically directed plunger having a central passage formed therein, the

-face of the upper end of said plunger providing a valve seat; a reciprocating tubular member embracing said plunger in snug relation and slidable axially thereof; a tubular guide sleeve in said tubular member and engaging the same in a slide t and movable axially thereof; a head for closing one end of said guide sleeve, said guide sleeve having openings formed therein intermediate its open end and its closed end, the outer Iface of said head being engageable With said valve seat for closing the passage through said plunger, and an abutment' member carried ybyv said head and extending into said plunger; and means on said plunger engageable with said abutment member for limiting axial movement of said head beyond a predetermined distance.

10. In a pumping mechanism of the class described, a stationary vertically directed plunger having a central passage formed therein, the face of the upper end of said plunger providing a valve seat; a reciprocating tubular member embracing said plunger in snug relation and slidable axiallg7 thereof; a tubular guide sleeve in said tubular member and engaging the same in a slide t and movable axially thereof; a head for closing one end of said guide sleeve, said guide sleeve having openings formed therein intermediate its open end and its closed end. the

outer face of said head being engageable with vsaid valve seat for closing the passage through said plunger, and an abutment member carried by said head and extending into said plunger;

means on said plunger engageable with said abutment member for limiting axial movement of said head beyond a predetermined distance; and means for limitingr rotation of said sleeve beyond a predetermined degree.

1l. In a pumping mechanism of the class described, a stationary tubular plunger mounted in vertical position ,and open at its upper end; a tubular member positioned above said plunger and movable axially thereof; a valve forming head closing the lower end of said tubular member and engageable with the end of said plunger lfor closing the same; means projecting from said head into said plunger; and means cooperating with said projecting means for limiting axial movement of said tubular member relatively to said plunger.

12. In a pumping mechanism of the class described, a stationary tubular plunger mounted in vertical position and open at its upper end; a

tubular member positionedV -above said plunger and movable axially thereof; avalve lforming head closing the lower end of said tubular member and engageable with the end of said plunger for closing the same; means projecting from said head into said plunger; and means cooperating with said projecting means for limiting axial movement of said tubular member relatively to said plunger, said tubular member being freely rotatable relatively to said plunger.

13. In a pump of the class described, a stationary tubular plunger; a tubular member; a head closing one end of said member, said member having lateral openings formed therein, said head being engageable with the end of said plunger for closing the same; engagement means carried by said head projecting beyond the end of said plunger; and means carried by said plunger engageable with said engagement means for limiting axial movement of said tubular member relatively to said plunger in one direction.

CHALON E. BRIDWELL.

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