US2204340A

US2204340A - Releasable floating valve

Info

Publication number: US2204340A
Application number: US276769A
Authority: US
Inventors: John R Bradshaw
Original assignee: Halliburton Oil Well Cementing Co
Current assignee: Halliburton Oil Well Cementing Co
Priority date: 1939-06-01
Filing date: 1939-06-01
Publication date: 1940-06-11
Anticipated expiration: 1957-06-11

Description

June ll, '1940. J. RQBRADSHAW. 2,204,340

' RELEASABLE FLOATING VALVEv l f Filed June 1, 1939 INVENTOR.

JOHN R. BFADSHAW A TTORNEY,

Patented June l1,

amasser@ FLoA'rmG vanvn 'John nmnamsm'nunun, ompmmm so Halliburton ou wen cementmg company,

Duncan, Okla.

'Application June 1, 193s, serum. 216.169

zClaims.

This invention relates Vto floating equipment vadapted for use in lowering pipe into oil wells or -The use of iloa't collars or 1io`at shoes for'this Purpose is well known to those skilled in the art. The present invention relates to a novel construc` tion by which the floating valve and the cage therefor may be removed from the pipe in which it is mounted should it become necessary or desirable to do so.

In accordance. with the present invention, it is proposed to mount a check lvalve in drill pipe, casing o'r the like, which will permit the' ilow of fluid downwardly through the pipe but vwill normally prevent upward flow of uid therethrough.

If. the apparatus of the invention is mounted in drill pipe, circulation in the normal direction used in 'drilling may thus be carried out without any attention being paid to. the iloating assembly.

' If, however, vthe drill pipev becomes stuck or if,

' companying drawing, in which:

lat on of the mud fluid by pumping iluid down on t e outside o! the pipe and upwardly through the inside, means is provided for so'manipulating the iloating equipment as to permit this to be accom- Plished.

fany reason, it is desirable to reverse the circu- A'ccordingly, it is one object of the invention to devise a novel floating valve arrangement which may readily be released vfrom the pipe andremoved therefrom if desirable.

It is anotherobject of the invention to devise which may be released .by dropping a ball and exerting pump pressure on latching means which holdsthe floating equipment in place. A

.u iloating equipment adapted for use in pipe and.

Uther objects and advantages reside incertain f novel features of the arrangement and con'struction of parts as will be apparent from the .following description taken i-n connection with the ac- Figure-l -is a vertical cross-sectional view of apparatus constructed in accordance with the invention and showing` the parts in the position which they occupy while -iluid is being forced I downwardly through the pipe;

'Flgure 2 is a vertical cross-sectional view of the Y1 apparatus shown in l'figure 1, with the parts 'construction and arrangement of'parts wi arrows inlf'ig'ure2and since the valve Il then seat within the cage. an ofzte valve bail2lmaybeplumpecloutofthewell.v

shown in the position they occupy after the floating valve has been dreleased and fluid is being forced upwardlythrough the pipe.v v

Referring to the drawing in detail, it will be seen thatdrill pipe is there illustrated as being I made up of sections l0 and I I connected together by a special collar l2 in which the floating valve l of the present invention is mounted. 'I'he collar' I2 is provided with an inner annular groove Il within which a number of leaf springs I4 are l0' mounted.A Above the leaf springs Il, a split ring II of spring steel `or the like'is mounted, this ring being somewhat conical in shape and serving as means for latching a valve cage, I I beneath the shoulder I1 at the top of the annular groove Il. li

The valve cage I6 is provided with a valve seat 1I, against which the valve body Il is adapted t0 ilt. The valve I9 may consist ofa cylinder of f rubber or the like. v

At its lower end, the valve cage il may be u provided with a rubber sealing ring 20 so that when the valve I9 isclosedA upon the seat Iffiuid 'cannot ilow upwardly through the collar Il.

- Mounted withinjthe collar I2 at its upper end,

abovetheringlhisareleasingringll secured g5 to the collar I2 by means of shear pins 2'2. A s illustrated in Figure 1, the ,lower end of the -ring 21| is chamfered and extends slightly down the surface'by a sudden rise in plnnp pressure and thus releasing the valve. cage Il.v from collar I2. 'The direction of circulations( mudmaytlienbereversed aaindicatedby EEE sembly and also releasing Ill While only one embodiment'of'theinven has Abeen snows and described herein. it is ous that various changesmay-be made in departing .fromthe spirit of the in tion or scope'o! the annexied claims.'

vtertnepmszzz'siem-,themas:lmammella I claim:

1. In floating equipment for use in pipe in oil wells, a collaradapted to be made up with the pipe, a valve cage in said collar, said valve cage having a valve therein, means for latching the valve cage against upward movement in said collar, means for sealing-the valve cage to said collar and means for tripping the latching means when desired to permit said valve cage and the valve therein to move upwardly and out of the pipe after the pipe has been floated into the well, said latchng means including a releasing ring held by shear pins to said collar and having a valve seat on its upper end and said tripping means including a ball adapted to rest upon said valve seat.

2. In floating equipment for use in pipe in oil wells, a, collar adapted to be made up with the pipe, a valve cage in said collar, said valve cage .having a, valve therein, means for latching the J OHN R. BRADSHAW.