USRE17424E - Valve mechanism - Google Patents

Description

Re. 1 Z424 F. L. PIVOTO VALVE MECHANISM Sept. 3, 1929.

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FELIX L. PIVO'I, OF BEAUVIONT, TEXAS.

'vALvn Mechanism.

Original application led August. 18,.1927, Serial No. 218,802, Patent No. 1,676,666) dated July i, 1928.

Application for reissue filed December 10, i928, Serial No.

5, 1929. Application for this reissue nice. July This invention relates to` new and useful improvements in a valve mechanism.

One object of the invention is to provide a valve mechanism specially adapted for use 5 in connection with a set shoe with which the lower end of the screen or pipeis equipped, when setting the same in a well, and having a protecting screen therefor.

Another object of the invention is to pron) vide a novel type of fluid back pressure valve in'connection with a valve guide and valve protecting screen.

A further feature of the invent-ion is to provide a novel type of back pressure valve adapted to be assembled with a set shoe and of such cornstruction` as to provide for a greater clearance for the of fluid than is the case with back pressure valves new in common use for such purposes and embodying also a novel type of screen for protecting the valve from the accumulation of foreign matter.

With the above and other objects in view the inventionhas particular relation to certain novel yfeatures of construction, operation and arrangement of parta, an example of which is given in this specification and illustrated in the accompanying drawings, wherein Figure 1 shows a vertical sectional view of a set shoe attached tothe lower end of a well screen and showing' the back pressure valves assembled therewith.

Figure 2 shows a cross sectional view taken on the line 2-2 of Figure 1,-and

Figure 3 shows a cross sectional view taken onthe line 3 3 of Figure 1.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each ofthe figures,

the numeral 1 designates a tubular set shoe of conventional construction whose lower end is contracted and of oval formation, as at 2, so `that it will readily follow the course of the bore in set-ting the screen or other pipe to which the set shoe is attached. This lower end is detachable and is threaded up into a section ofthe shoe/above it which is internally threaded as at 3. The upper end of 5b the set shoe is `internally threaded as at t,

and a tubular wash pipe seat-5 is screwed therein and has its upper end 8 flared to receive the lower end of the wash pipe. The

set shoe is attached to the lower end of the 325,052, reissue Tro. 17,208, dated February "i, lees. ne.

well screen 7, and the seat 5 is spaced inwardly from the set shoe to provide space to receive the lower end of said screen 7, so that said screen may be connected to said set shoe. When the screen or pipe 7 is set, and it is desired to wash the outside of the same, a wash pipe is lowered therein and its lower end is seated in the flared upper end of the seat 5 and cleanv water is forced down through said wash pipe, said water passing on down through the valves, assembled with the sety shoe, and hereinafter described, and passes out through the opening 8 at the lower end of the set shoe and up around said screen.

llormalli'f however, said valves are closed to prevent the inflow of fluid into the screen 2' up through. said set shoe. rllhe lower end of the .vash pipe seat 5 is formed with an annular valve seat 9 having` a central opening 10. Spanning the wash pipe seat 5 and preferably formed integral therewith there is a spider 11, above the valve seat, having a central bearing 12 which is preferably flared each way. The `numeral `13 designates the lower annular valve seat which is screwed up into the set shoe 1 and which has a central opening lll. Formed integrally within the valve seat 18 there is a spider preferably consisting of the oppositely disposed upwardly converging legs 15, 15, whose upper ends are united by a ring lihaving a central bearing 17 therethrough which is flared each way. There are the upper and lower valve stems 18, 18, which depend through the respective bearings 12, 17 and whosev upper ends are formed with heads 19, 19 having convex surfaces "which work in downwardly converging joints into which the upper ends of the respective bearings 12, 17 are formed. There are the conicalv shaped back pressure valves 20, 20 sliding-ly mounted on the respective stems 18, 18 and these respective valves have the depending housings 21, 21, which are perforated or formed of foraminated material. These valves normally control the openings 10, llrespectively and prevent the upward passage of fluid through the set shoe but open to'permit the downward passage thereof. rW'ithin each housing 21 there is a packing 22 which closely surrounds the corresponding stem 18 and prevents leakage up through the valves and which are heldin place by glands as 23 fitted around the stems and held against the underside of said packing rings. yThere are the washers 24 which are maintained on the lower ends of the stems, by the nuts 25 screwed thereon, and it closely within said housings and between the washers 24 and the corresponding glands 23 and surrounding the stems 18 there are the coil springs as 26 which normally operate to hold the glands 23 against the packing 22 as well as to maintain the valves 20 seated. The seats l2 and 17 are so formed as to permit the stems 18 to freely swing' laterally in any direction when the corresponding valves are open by fluid pressure from above and this permits said valves also to swing laterally as indicated in dotted lines in Figure l. This freedom of movement of the valves provides a greater clearance for the additional pas-sage of iiuid as well as the passage of foreign mattei' through the openings l() and 14.

In order to prevent the entrance of foreign matter into the valves, particularly large particles of foreign matter which are liable to clog said valves, I have provided a tubular screen si' whose upper end is closed and whose lower end is threaded into the upper end of the wash pipe seat 5 within the iiared upper end G thereof. This screen is perforated or foraminated and may be of a length to give the required screening capacity and it will be effective to exclude particles of foreign matter from the valves by which they are liable to be clogged or held open. This screen is threaded into the wash pipe by means of left hand threads.

The housings 2l are also perforated, as hereinbefore stated, so that any foreign matter collecting therein may be Vreadily ejected.

IWhile I have shown what I now consider the preferred form of this valve mechanism, it is obvious that various mechanical changes may be made therein and equivalents substituted for the parts shown and it 1s contemplated that such changes and adaptations may be made in. the structure and such equivalents substituted, as are comprehended within the scope of the appended claims.

What I claim is:

l. A valve mechanism including a valve seat having an opening, a downwardly opening valve controlling said opening, a bearing member above said seat having a bearing therein., a stem supporting the valve and working tlxrough and having a swiveling connection with said bearing, a. yieldable member associated with the stem and normally holding said valve in closed position, a screen disposed above the seat and provided to exclude foreign matter therefrom.

2. A valve mechanism including a valve scat having an opening, a downwardly openvalve controzling said opening, a spider disposed above said seat and formed with a bearing aligned with said opening, a valve stem to the lower end of which vsaid valve is connected, said stem working through said bearing and having a universal connection therewith to provide free lateral play of the valve relative to the seat, means normally holding said valve yieldingly against said seat and a screen disposed above the seat and provided to exclude foreign matter therefrom.

3. A valve mechanism including a seat having an opening', a spider disposed above the seat and having a bearing aligned with said opening, a stem extending through said bearing and sustained thereby, a valve associated with the lower end of said stem and normally closing said opening, said valve having a depending foraminated housing, an abutment carried by the lower end of the stem, a yieldable member enclosed within said housing and interposed between said valve and abutment and normally holding the valve yieldingly against its seat in position to close the opening thereof.

4. A valve mechanism including a seat having an opening therethrough, a spider disposed above sain seat, a downwardly opening valve controlling said opening, a stem on which the valve is slidably mounted, the upper end of said stem having a head which has a swiveling connection with said spider, an abutment carried by the lower end of the valve stem, a foraminated housing depending from said valve, a yieldable member enclosed by said housing and interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening. 5. A valve mechanism including a seat having an opening therethrough, a spider disposed above said seat, a downwardly opening valve controlling said opening, a stem on which said valve is mounted, the upper end of the stem having a head which has a swivetling connection with said spider, an abutment carried by the lower end of the valve stem, a yieldable member interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening, a housing carried by the valve and enclosing said yieldable member, said housing being provided with perforations.

6. A valve mechanism including a valve seat having an opening therethrough, a spider disposed above said seat and having a bearing, a valve stem whose upper end has a swiveliug connection with said spider and which works through said bearing and opening, a downwardly opening valve controlling said opening and having a bearing on said stem, a foraminated housin depending from said valve, a packing wit 1in the housing around the stem, a gland in the housing abutting said packing, an abutment carried by the lower end of the stem, a yieldable member interposed between said abutment and gland and enclosed by said housing.

7. A valve mechanism including a valve 1 seat'having an openingtherethiougli for `the passage of fluid, a` downwardly opening valve controllingsaid opening, an anchor associated with said seat, a valve stem sustained by anchor and, having a swinging connection therewith, said valve being connectedto said stein, a ioraminated housing depending from the valve, a yieldable member within said housing andsustained by rsaid stem and normally operating to hold the valve yielding against said seat and in position to close said opening.

8. A valve mechanism supporting member, a valve seat therein, having an opening, a downwardly opening valve controlling said opening, an anchor associated with said seat, a valve stemsustained by the anchor and having a swinging connection therewith, said valve being connected to said stem, ahousing depending from the valve, a yieldablc memberwvithin said housing and the sustained by the stem and normally operating said seat to hold the valve yieldingly7 against and in position to close said opening.y

9. Avalve mechanism includinga valve seat having an opening therethrough iior the passage of iiuid, a downwardly opening valve controlling said opening, an anchor associated with said seat, avalve stein sustained by the anchor and having a swinging connection therewith, said valve stem,a yieldable membervsustained by the stein and normally operating to holdv the valve yieldingly against said seat and in position to close said opening.

10. A valve mechanism including a tubular member having a valve seat in its lower end provided with an opening, a transverse spider in said tubular member above said seat having a bearing, a stem fitted through said bearing and having a swinging connection therewith and extending through said opening, a` downwardly opening valve slidable on said stem and controlling said opening, a yieldable member sustained by the stem and normally operating to hold the valve yieldingly against said seat in position to close said opening. i

11. A valve mechanism including a tubular member having a valve seat in its lower end provided with an opening, a transverse spider in said tubular member above said seat having a bearing, a stem itted through said bearing and having a swinging connection therewith and extending through said opening, a downwardly opening valve slidable on said stem and controlling said opening, a yieldable member sustained by the stem and normally operating to hold the valve yieldingly against said seat in position to close said opening, and a screening device attached to the upper end of said tubular member.

12. A valve mechanism including a valve seat having an opening, a downwardly opening valve controlling the opening, a bearing including a tubulark being connected' to said member above said seat having a bearing therein, a stem supporting the valve and working loosely through said bearing, and having a yswinging connection therewith to permit the free swinging kof saidX valve,.and av mounted on said seat and formed with a bearing aligned with said opening, a valve stem tothe lower end of which said vvalve is connected, said stem working through said bearing and having a swivelling connection with the cage to permitffree lateral play ot the valve and means normally holding said valve yieldingly against said seat. i i

14. A valve mechanism including a valve seat having'anopening therethrough, avalve cage carried by said seat and formed with a bearing aligned with said opening, a valve stem working through the cage and bearing and having a lateralor swinging movement relative tothe cage, and having a universal connection `with the cage, a valve disposed on -the opposite side of the seat irom the cage,i

said valve being connected to the stem and controllingsaid opening and means normally holding said valve yieldingly against said seat.

l5. `A valve mechanism including a valve seat having an opening therethrough, a valve cage above the seat and formed with a bearing aligned with said opening, a valve disposed opposite the cage and controlling said opening, a valve stem having a universal connection with the cage and to which the valve is connected, said stem working through said -cage bearing and having a lateral or swinging movement relative to the cage and seat, a yieldable member associated with the stem and normally operating to hold said valve seated to close Isaid opening.

1Q. A valve mechanism including a seat having an opening therethrough, a cage disposed above said seat, a downwardly opening valve controlling said opening, a stem on which the valve is slidably mounted, the upper end of said stem having a head having a swivelling connection with the cage, an abutment carried by the lower end of the valve stem, a yieldable member interposed between said abutment and valve and normally holding the valve yieldingly against its seat in position to close said openin'.

17. A valve mechanism including a seat having an opening therethrough, a cage disposedabove said seat, a downwardly opening valve controlling said opening, a stein on which the valve is slidably mounted, the upper end of said stem having a head having a swiveling connection with the cage, an abutment carried by the lower end of the valve ioo by the valve and` stem, a yieldable member 4interposed between.

said abutment and valve and normally holding the valve yieldingly against its seat in position to close said opening, a housing carried enclosing said yieldable member,

18.y A valve mechanism including avalve seat having an opening therethrough, a cage disposed above said seat and having a bearing, a valve stem whose upper end has al swivelling connection with the cage and which works through said bearing and opening, a

v Valve controlling said opening and having a bearing on said stem, a housing depending from said valve, a packing within'said housing Varound the stem, a gland in the housing abutting said packing, an abutment carried by the lower` end of the stem and a yieldable member interposedk between said abutment Land gland andenclosed by said housing.

19. A valve mechanism includinga valve seat having an opening therethrough for theV passage of fluid, a valve controllingsaid opening, an anchor associated with said seat, a valve stem sustained by the anchor and having a swinging connection therewith, said valve being connected to said stem and means associated with the stem and normally holding t-he valve yieldingly against the seat and in position to close said opening.

20. A device of the character described in cluding a tubular set shoe, an annular valve seat therein having a tubular'member upstanding therefrom, spacedI inwardly from the set'shoe, a yieldably mounted downwardly opening valve controlling said seat, and a tubular screen attached to said tubular member and upstanding therefrom.

42l. A device of the character described including a tubular set shoe, a valve seat anchoredtherein, a downwardly opening valve controlling said seat, means normally, holding the valve closed, a tubular screen anchor upstanding from the valve seat, a tubular screen attac-hed to and upstanding from said screen anchor.

22. A device of the character ldescribed including a tubular set shoe, a valve seat anchored therein, a downwardly opening valve controlling said seat, means normally holding the valve closed, a tubular screen anchor upstanding from the valve seat, saidscreen-anchor being spaced inwardly from said set'shoe to provide space between the set shoe and screen anchor for the reception of a tubing to be attached to the upper end of said set shoe and a tubular screen attached to and upstanding from said anchor.

23. A device of the character described including a tubular set shoe, a valve seat anchored therein, a downwardly opening valve controlling said seat, means normally holding the valve closed, a tubular screen attached to and upstanding from said seat and spaced inwardly from the set Shoe.

In testimony whereof I have signed my naine to the specification.

FELIX L. PIVOTO.

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