US2049304A - Tubing shoe valve - Google Patents

Description

July 28, I193.6. w. w. LLOYD I TUBING SHOE VALVE Filed May 2, 1955 2 Sheets-Sheet 1 lu lull July 28, 1936. w w LLOYD 2,049,304

TUBING SHOE VALVE Filed May 2, 1935 2 sheets-sheet 2 j I l j /a I/a,

i j i' ZZQ/ i 23 16 A /f/fw D 5 :w

L //5 E257, Cj l5? 35 I2C Z5 35 f J Z 2 241 M fg 2f M 55 fa l f5 55 29 EA Q9 @7 vez Patented July 28, 1936 TUBING SHQE VALVE William W. Lloyd, Boggs, Okla. Application May 2, 1935 Serial No. 19,521

scams. (o1. ioa-zzol This invention relates to a. tubing shoe valve particularly adapted for coaction with plunger pumps.

It-is particularly aimed` to provide a structure vwhich operates by the action-of the uid and a construction wherein sand, mud, pieces of cups and the like, are'trapped, `'and washed outor removed by downward flow of the fluid.

The more specic objects and advantages will become apparent from a consideration of the description following taken in connection with accompanying drawings illustrating an operative embodiment.

-In said drawings:-

Figure 1 is a centralV through the device;

Figures 2 and 2"l are enlarged central longitudinal sectional views taken through the upper portion and lower portions of the device, respectively, taken on the plane of 'lines 2-'2 and 2-a-'25 of Figure l;

Figure 3 is a 'View similar to Figure 1 but showing the working valve in open position as contrastedwith the closed position 'of Figures 1 and 2;

Figurer 4 is a cross section taken on the plane of line 4-4 of Figure' 2, and Y Figure 5 is a cross section taken on the ofY line 5-5 of Figure 2.

Referring specically to the drawings, I0 designates well tubing through which aconvenplane tional sucker rod III operates and which carries Vthe movable cylinder or barrel II-fa of an inverted plunger pump or working valve assembly. The normally stationary piston of the plunger pumpv isshown at I2 located within said cylinder II--a and carried by a depending tubular rod I2-a. Rod IZ-a carries a piston IZ-b including a cage IZ-c and an upwardly operating valve I2d. Said cage I Z-c is equipped with an outwardly extending flange I3. Said cylinder I Z-a, has the usual upwardly opening valve I Z-e adjacent the top. A ange II-b at the lower end of the barrel II-a is engageable with the piston I2 to unseat the latter through abnormal lift of the sucker rod I I and barrel II-a.

Screw-threaded to the lower end of the tubing I0 at I4 is a neck o-r nipple I5. A shell is shown in sections I6 and I1, detachably screw-threaded at I8 and I9, to a shoe valve or coupling 20, shell section I1 being detachably screw-threaded at 2| to the neck I5. Concentrically of the neck 20 and screwed thereto at 2i, is a pump shoe 22 which extends down into the shell I6, having longitudinal section outlet ports or openings 23 therein adjacent the lower end.

Detachable or integral with the neck 2U is an upward extension 2li which has a seat -25 engageable by ilange or valve portion I3, when the device is in closed position. It is obvious that I may make the part 2li detachable, if desired, in orderthat valve seats of diierent sizes may be used when desired, or worn valve seats replaced. Detachably screwed to the projection or extension 211 as at 26 is a shield 21, which terminates short of the nipple I5, in order that sand, mud, and the like, may collect between the shell portion I 1 and the shield 21. A plurality of passages or ports 28, are provided through the-extension Slightly below the plate 30, ports 33, of any de-` sired number, are provided through the shell section I5, adapted to be covered at times by a bobber 3 which is a solid or enclosed metal body, and which is urged upwardly by an expansive coil spring 35surrounding a depending stem 36 thereon, and abutting the bobber, and the lower wall 31 of the shell section IB, which lower wall is perforated as at 38, to enable Ailuid to enter the section I6 below the bobber 34 to act as a cushion, in combination with the spring 35 to the downward movement of such bobber.

The device is shown in closed position in Figure l rin `which .the plunger pumpbarrel II-a and piston I 2 operate in the usual manner to pump ilui-d from a well. Abnormal elevation of the sucker rod I I and barrel II-a, at any desired time, will cause ange II-b to engage piston I2 and elevate or unseat flange I3, to the open position of Figure 3. The device operates through the action of the fluid. When the plunger pump valve I2 is thus unseated at I3, the bobber 34 is pushed down by the iluid, whereby the holes or ports 33 are exposed. The fluid rushes down the tubing between the shield 21 and shell section I1, and down through shield 21 working out matter collected therein. Shield 21 confines trash such as pieces of cups which may at times be pulled oi of piston I2-b, in a direct line descending fluid, so that it cannot lodge or catch in corners or on projections; and the v-Shield also confines sand, mud and grit be- 4Qshell member rising from the neck, a pumping tween the same and the shell section l1, vtheY water washing out the latter through passages 28 down shoe 22, some of the material escaping through the openings or ports 23 into shell section I6 and then through Ythe slits 29, before the pressure is suicient to depress the bobber 34 into the position of Figure 3, in which latter pc#V sition the mud, sand and grit as well as trash is passed out through the bottom of shoe 221`and ports 33.V When the pressure ofthe fluidV subsides,'the bobberll is returned to the position shown in Figures 1 and 2a, keeping all material out with the exception of oil and some gas. It

will berunderstood of course that the troi theY bobber 34 within the shell section I6 is slome--V what loose so as to avoid any danger of` binding.

n parts. 1 y,

' operable through abnormal movementofV a partv of the pumping device to vopen and close the pumpshoe, and means of communication be-V tween the pumpshoe and the space between the shield and shell member, said space serving as a trap for the collection of sand, mud and the like.

2. A device ofV the class described having a shell member, a neck at the base thereof, a pump shoe depending fromisaid necka shield in the device operable Withinthe shield having means operable through abnormal movement of a part of vtheplmlping device to open and close the pump shoe, means of communication between the pump shoe and the space between the shield Yand shell member, said space serving asa trap for the collection of sandmud and the like, a neck at the upperend of the shell member, tubing suspending the neck, andra sucker rod'extending `through the tubing and connected to the pumping device, f Y

,'3. A 'device of the. class described having a shell member, a neck atthe'base thereof, a pump shoe depending from said neck, a shield in the shell member rising from the neck, a pumping device operable within the shield having means operable through abnormal movement of a part of the pumping device to Vopen and close the pump shoe, means of Vcommunication between the pump shoe and thespace between the shield and l shell member, said space serving as a trap for the collection of sand, mud and the like, a shell 5 member depending from said neck having ports through its Wall, and a bobber in the lastV men# tioned shell memberV controlling said rports according to the pressure lwithin the device. .Y V 4. A device of the class describedY having a 1,0 shell member, a neck at the base thereof, a pump shoe depending from said neck, a shield in the shell member rising from the neck, a pumping de- Yvice operable within the shield having means ,op-

r.shoe andthe space between the shield and shell l member, said space serving as a trap for the C01-,V lection Vof sand, mud andthe like, a shell mem- 20 ber depending from Vsaid 4neck having vports through its'wall, a bobber in the last mentioned; shell member controlling said ports according to, the pressure Within the device, the second mentioned shell member being'slitted yfor seepage, 25 a plate on the lower end of said pump barrel; said pump vbarrel Vbeing perforated aboveV the.: Y plate, said -plate'constituting an abutment forV upward movement of the bobber, and means preventing'closing engagement of the bobber with the pump barrel. Y v Y 5. A device of the class Y described having' a: shell member, a neck at the base. thereof, a pump Y shoe depending from said neck, a shield in the 5 shell member rising'from the neck, a pumping device operable within the shield having means Y operable through abnormal movement of a part of 'the pumping device to open and close the pumpr shoe, means of communication between the pump shoe and the space betweenthe shield and shell 40 member, said space serving as a trap for the co1- lection of sand, mud and the like, ashell mem` ber depending vfrom said' neck having ports;V through its wall, a bobber in the last'mentioned f the pressure with ,the device, the second mentioned shell member beingslitted for seepage; aV plate on the lower end of said'pump barrel, said pump barrel beingr perforated vabove the plata' Y' said plate constituting an abutment for upward movement-of the bobber, means preventing closf ing ,engagement ,of Ythe bobber Ywiththeapump barrel, the second mentionedlshell section having` Y a bottomV perforated wall, and anexpansiverspring-VY within the second mentionedfshell section enfui gaging said Wall and said bobber. Y f

f, f WILLIAM W. LLOYD."

shell member controllingsaid ports accordingtol DY

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