US2047414A - Chemical pump - Google Patents

Description

y 1935- c. E. HENRY ET AL 2,047,414

CHEMICAL PUMP Filed March 11, 1935 31. "-35 19 Charles .E'. Henry eTames W Sullivan Patented July 14, 1936 UNITED STATES.

CHEMICAL PUMP cnmunn mrm wisumnn.

Santa Barbara, Calif.

Application sin-tn 11, 1935, Serial No. 10,449

a Claim. (CL-10H) This invention has to do in a general way with apparatus for pumping measured quantities of liquid or semi-liquid material having chemically active properties and is more particularly concerned with improvements in pumps of this general character which are especially adapted for use in delivering a chemical treating reagent into the flow line of an oil well pump for the purpose of breaking an emulsion being pumped. This practice and its purpose are well known to'those familiar with the art, and various types of pumps and other injecting apparatus have been devised and used with varying degrees of success for injecting a chemical emulsion breaking reagent into the flow line in the general manner contemplated by this invention.

The chemicals used for this purpose are ordinarily of a heavy consistency and the ingredients therein are of a comparatively active nature so that the usual type of pump with which we are familiar, embodying inlet and outlet valves and packing glands around the moving parts, suffer due to corrosion of the valves and breaking down of the packing glands and are therefore a constant source of trouble.

It therefore becomes a primary object of this invention to produce a pump of the general type described whichis characterized by the absence of any packing gland whatever and, further, by the fact that it embodies only a single valve which may be in the nature of an ordinary spring pressed ball check.

It is a further feature of processes, wherein the chemical treating reagent is injected into the flow line, that the quantity of reagent injected is ordinarily relatively small and must be varied depending upon the quantity of the oil being pumped. It is another important feature of this invention that the device is adaptable for adjust-' ment so as to control the quantity of chemical material delivered for each stroke of the apparatus within relatively wide limits. One important feature of the invention is that the device can be adjusted so that the quantity delivered for each stroke may be reduced to almost an iniinl-.

tesimal amount.

Although various means may be employedfor operating the pump contemplated by this invention, we consider it a feature thereof, when the device is used in conjunction with an oil well pump, that the chemical pump contemplated by our invention is operated by the oil well pump itself so that a reagent is delivered into the flow line for each stroke of the oil well pump. In this way the quantity of treating reagent injected reference to Fig. 1 which, as pointed out above,

into the oil can be controlled directly in propor-' tion to the quantity of the oil being pumped.-

It is a further object of this invention to produce a device of the class described which is of simple form and construction, may be economi- 5 cally manufactured, has the minimum number of parts, and can be readily taken apart and reassembled for the purposes of inspection and cleaning.

The details in the construction of a preferred 1 form of our invention, together with other objects attending its production, will be best understood from the following description of the accompanying drawing, which is chosen for illustrative purposes only, and in which Fig. 1 is a diagrammatic elevation illustrating one application of our invention in connection with an'oil well pumping apparatus;

Fig. 2 is an enlarged fragmentary sectional elevation illustrating details in the construction of a preferred form of our invention; and

Fig. 3 is a plan section taken along the line 3-3 of Fig. 2.

Referring now to the drawing, with particular shows in adiagrammatic way an oil well pump of conventional construction, reference numeral Ii indicates a standard which has bearings l2 at its upper end to support a walking beam I3. The walking beam I2 is operated in the conventional manner by means of a pitman drive, generally indicated by reference numeral I4, and the front end of the walking beam is connected to a sucker rod I! which extends downwardly through the upper end of the tubing IS. The tubing ll communicates with the flow line generally indicated at H into which the chemical treating reagent is introduced through a fitting I. from an outlet pipe or conduit IS.

The pump or injecting apparatus contemplated by this invention, which is utilized for the purpose of injecting a treating reagent into the flow line, is generally indicated by reference numeral 20, and the details in the construction of this apparatus are perhaps best illustrated in Figs. 2 and 3, in which reference numeral 2| indicates a tank or container supported upon legs 22 and having a cover indicated at 23. Mounted in the tank or container in any suitable manner is what we may term a stand pipe 24, and 50 in the form of our invention shown in the drawing this stand pipe is shown as having a threaded enlargement 25 near its lower end which is in threaded engagement with an internally threaded flange 28 mounted in the bottom of the container. 55

The conduit II is shown as being connected into the bottom portion of the stand pipe 24 as indicated at 21.

It will be observed that the stand pipe 24, which in effect constitutes a portion of the conduit II, is merely in the nature of a vertically extended open ended pipe which extends a substantial distance into the container. This pipe, which we may also term a cylinder member, has a wall port or a plurality of wall ports indicated at 2! which are .situated within the container and establish communication between the interior of the stand pipe 14 and the interior of the container. Reference numeral it indicates what we may term a piston or plunger member, reciprocatively mounted within the stand pipe and having a close sliding fit with the interior thereof so as to constitute a plunger and cylinder construction.

It will be seen from the construction as so far described that, when the container is filled with the reagent to a point above the lower edge of the port II, the stand pipe or conduit 24 will be nlled to the level of such liquid. As the plunger member II is reciprocated from a point above the lower edge of the port 2! to a point below the lower edge of the port 2!, (as indicated in dotted lines L) pressure will be applied to the liquid below the ports so as to force the same outwardly through the conduit.

Since the feed into the cylinder member 24- is by gravity, it will be seen that the only valve necessary in the apparatus contemplated by our invention is one which is positioned at some point in the outlet portion of the conduit or betweentheportil andtheflowline. Inthis form of our invention we show such a valve arrangement as being provided in the bottom portion of the stand pipe or cylinder member 24. This valve, which is indicated by reference nu- 'meralfl,isshownasbeinginthenatureof an ordinary ball check which is adapted to engage a seat II formed in the lower end portion of the stand pipe and is yieldably pressed upwardly toward such seat by means of a compression spring 32, the lower end of which is received in a threaded plug member II. For the purpose or. guiding the valve 3|, we show the interior of the valve chamber, which we have indicated by reference numeral 34, as being provided with ribs II, such construction being best illmtrated in Fig. 3.

Although various means may be employed for effecting the reciprocation of the plunger member 3|, we have, as pointed out above, considered it an important feature that the plunger member be reciprocated in timed relation with the action of the sucker rods which pump the emulsion into the flow line. As a means of accomplishing this result, we provide a lever member indicated at II which is shown as being pivoted to one side of the container and extends transversely across the container through a slot 81. The intermediate portion of this lever member 84 is connected through a suitable stirrup connection II with a reduced rod section 3! on the upper end of the plunger member 3|. We prefer to provide a threaded connection here, a lock nut 4| being provided for the purpose of holding the members in proper adjustment. The outwardly extending portion of the lever member it is shown in Fig. 1 as being connected through another stirrup connection to the lower endofanactuatingrodorbarfl. '1hisbar42 is shown as being formed in sections, the intermediate section 41' being carried in guide members 44 and 44' mounted onthe standard II. The upper end of the bar section 42' is positioned immediately below the walking beam l8 and is provided with a cap member or plug member 5 45 which is threaded to the connection 4! for vertical adjustment, a lock nut 4| being provided to hold the same in proper adjustment. A tension spring II is attached to the free end of. the lever member 34, such tension spring being also secured to the member II or other suitable iixed member so that the lever is normally yieldably held in the position shown in Figs. 1 and 2 where the plunger ii is in its uppermost position.

In operation it will be observed that as the 16 walhng beam l3 swings downwardly in the direction of the arrow A it will be brought into engagement with the adjustable cap 44, thereby forcing the lever member 30 and the plunger member 3| downwardly during the continued so downward movement of the walking beam after such engagement. The member 4| is adjusted so that this downward movement of the walking beam is effective to push the bottom of the plunger member 3. downwardly to a point below the 88 lower edge of the port or opening 2!, the distance beyond the lower edge of the port it, to which the plunger member is pushed, being the factor which determines the quantity of treatingliquidthatis injected fromthestandpipeorfl' cylinder member 24 into the flow line. Through the arrangement illustrated in Pig. 1 it will be observed that the quantity of liquid injected into the flow linecanbeeasilyand quickly adjusted through the medium of the member 4!.

It will be apparent that the device contemplated by our invention is particularly adapted to pumping various types of reagents which normally have a tendency to attack packing and corrode valves, inasmuch as the device is characterised by the absence of any packing and emplays a single valve which is readily accemible and is of the simplest construction.

It is to be understood that, while we have herein described and illustrated one preferred form of our invention, and have also illustrated one preferred application or use of the same, the invention is not limited to the precise construction described herein, but includes within its scope whatever changes fairly come within the spirit of the appended claims.

We claim as our invention:

1. In combination with a well pump having a flow line and a standard supporting a walking beam, means for injecting a treating liquid into the flow line during the operation of the walking beam embodying: a tank adjacent to said standard adapted to contain treating liquid; a stand pipeinthebottomofsaidtarikhavingawallport communicating with the interior of said tank; a downwardly opening check valve in said stand pipe below the port therein: a conduit connecting the bottom of said stand pipe with said flow line:

a piston member in said stand pipe; a lever member pivotally mounted above said plunger and adapted to impart reciprocation thereto; yieldable means mounted on saidv standard normally supporting said plunger with its lower end above the bottom of said port; and means comprising 70 a push rod slidably mounted on said standard having its lower end secured to said lever member and having its upper end adapted to be engagedbysaidwalkingbeamforswingingsaid levermembertopushthebottomotsaidpiston" member downwardly below the lower edge oi. said P rt.

2. In combination with a well pump having a flow line and a standard supporting a walking beam, means for injecting a predetermined quantity of treating fluid into the flow line during the operation of the walking beam embodying; a tank adjacent to said standard adapted to contain treating liquid; pumping means within said tank; an adjustable slidable bar mounted on the walking beam standard and adapted to be actuated by the walking beam; means for yieldably holding said bar at its upward limit of extension: a lever connecting said bar with said pumping means inside the tank; and a conduit connecting said pumping means with said flow line.

tityoi'treatingiluidintotheflowline durlngthe operation or the walking beam a tank adjacent to said standard adapted to contain treating liquid: pumping means within said tank; an adjustable slidable bar member mounted on the walking beamstandard, comprising a lower section, an intermediate section. and an upper cap member section threaded into the intermediate section and adapted to be periodically engaged by said walking beam; means for adjusting said cap member, means for yieldably holding said bar at its upward limit of extension; a lever mounted on said tank connecting said bar with said pumping means within said tank: and a conduit connecting said pumping means with said iiow line.

CHARLES E. HENRY. JAMES W. SUE-IVAN.

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