US1652369A - Cement-dumping bucket - Google Patents

Description

Patenied Dec. 13, 1927.

4vsriLLrEI w. Lewis AND iioiiiv sUivrAiT, or'i-zous'roiv; rmuis.V

i onrrnivr-nurrriive Brioim'r;

lApplieainm' 'fiieii August 3,

Our'invention relates to'V an: improveinent in duinping` valves to be 'einployed iii cement buckets and similar devices employed' in oill well Operations. Inl cenienting wells, it'` is more or less common to place thje'cementfin a'buoket wliich is lowered to the bottoni ofthe vwell and the'cement diseliai'ged from the bucket' at the d'esii'ed point.V The 'disccurs so that the full charge of cement is notdelivered at the bottom of the well where desired.

It is an object ofouij invention to provide an'attachment for the valve in a cementbucket whereby the valve will be retained in its seat until the bottoin of th-e well is reached, allowing the `valve to be again seated without difiiculty beforethe ,bucket is again used.v

Referring to the drawing herewith, we have illustrated one embodiment of the invention, Fig'. 1 being a side elevation of one form of cement bucket having ourV improved valve thereon. i section of the lower end of the bucket showing the valvein position therein. Like numerals of reference designate like parts in both views.

In the drawing, I have shown a bucket 1, such as may be employed for holding cement while it is lowered to the bottomof thewell. Said bucket has aii upper bail 2 vwhich may be engaged vby `a cable or other 'lexible device for lowering the same into he well. V

At the lower end of the bucket is a valve housing 3 threadedV at its upper end for attachmentwithin the lower end of the bucket. The valve housing is tubularin shape,'havinga'central passage 4 therethrough to allow an outlet for the cement. The upper The valve 6 comprises a cylindrical head,

the lower Vend ofwhich is roundedv to fitl the seat 5. A valve stem 7 extends centrally downwardly through the opening 4 and lhas projecting from the lower end of the housingV af dart 8. This is a flattened member V Fig. 2 is a central Vertical:

1926. serial Na. 126,895;

adaptedpto contact with the bottom of hole whenthe-'bucket is used.

In'order to'prevent the upward inovement of the'valve while the bucket is being low- .ered,we provide on 'opposite sides of 'the valve stem 7, and spaced downwardly from the upper endV thereof a pair of'spring memand flattened plates; the upperV eiids of which are provided with openings vto receive a pinv or bolt "10 extending diametrically through theiva'lve Stein 17 and :'act-ing to clainp the upper ends of the' spring members 9 within shallow recesses 11', forined in the sides of the said valve stein. The plates' are curved o 'outwardly at-their lower ends to fit against i `the' inner'wallsl of the passage 4. One of these Springs 9 is shorter than the opposite spring 9' so that the ends of the two Springs may engage within a spiral groove or recess 12 vin the inner wall of the housing.

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i'bers`9; 'These Springs are soniewhat narrow This groove 12 forins ,a vthread 'on the interior of the housing and, as the ends of the two springs' engagewithin the troughs of the thread, the rotation of the valve will allow the movement of the spring and the valve stem downwardly when necessity arises.

In the operation of the device the valve is seatedvat the lower end of the bucket and in so doing it may be necessary to rotate the valve Stein, pulling downwardly during said rotation upon the lowerend of the valve. The bucket is then ready for use, and when it Vis 'lowered into the well to the bottoin therei of, ,the lower end 8 will strike the bottom, forcing the valve up ofvitsseat and allowing the discharge of the cement through the passage L1 about the valve stem. It will be noted that the Springs bearing in the troughs of 'the groove or thread 12 will tend to resist any accidental blow upon the valve tending to unseat the same and will also prevent the 'valve from falling off its sea-t due to pressure of liquid below it. The heavy blow received at the lower end of the valve when it Strikes the bottoin of the well will, however, unseat the valve in the usual manner. The'bucket will then be raised to the surface ioo and the valve' again seated by drawing i poses than the dnmping of cement.

1. In a cement bucket or the like a. valve housing at the lower end thei'eot having a tuhulai' passage therethrough, a. valve at the uppei'end of said housing, a. valve stem thereon projectingr downwai'dly through said passaige, said iassage having a spii'al groove cut upon tie intei'ior thereof land`` i Springs on said valve stein ('ngagzing snikl groove` in the inanner (lescrihech 2. In a cement hueket or the likeV``` a valx'e housing at the lower end thereot having; an

axial pass-age therethrough, a valveHi-n saitl bueket to close said passage, ay Stein 'on' said valve pi'oJectln,Y` downwardly through'` saicl passage,` and means on said valve Stein engaging within said passage to resist the It is also contemplat'etleinploying it to disehai'ge inovement of said valve from` said passage,

aml` adapted to permit saating'of said valve only by i'otation of said stem relaitive to said housing.

`3. In a cement bncket or* theillke, a valve housing at the lower end thereof having an axial passage therethrough, said passage having a spiral groove therein, a valve in said bucketto elo-se said passage, av stem on said valve pi'o3eeting (lown\vaidly through said passage, and means on said valve engag-` mg within said passage to resist the movenient of said valve from said passage comipi'ising Springs on said Stein projecting .into

said groove. i

In a device of the Character descrihecl,`

`a buckets a valve liousing at the lower end tliereot having a. passage loiigitudiiially thei'eof, a valve at the upper end of said oassa es al steni on said valve iifo'ectin downwardly through sai'fl passagmoppesite VSprings oii saitl stem engagmg said passage,

one spring being longer than the `otherto fit within a spiral groove in said passage, `and` allow said stein to be sctfewed iii-om said x passage.

In `testiinony' whei'eof we hei'eunto our signatures this th day of July, A. D. 11926.

WALTER WJIEWJS JOHN R. SULAN. i

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