|Publication number||US2663307 A|
|Publication date||Dec 22, 1953|
|Filing date||Jul 16, 1949|
|Priority date||Jul 16, 1949|
|Publication number||US 2663307 A, US 2663307A, US-A-2663307, US2663307 A, US2663307A|
|Inventors||Birdwell Louis J|
|Original Assignee||American Iron And Machine Work|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (15), Classifications (12)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Dec. 22, 1953 L. J. BIRDWELL WASHOUT SUB FOR WELL PACKERS Filed July 16, 1949 ATTO RN EY FIG Patented Dec. 22, `1953 WAsHoU'r SUB Fon WELL PACKERS Louis J. Birdwell, Oklahoma City, Okla., assignor to American Iron and Machine Works Company, Oklahoma, City, Okla., a corporation oi Delaware Application July 16, 1949, Serial No. 105,154
f 4 Claims. l
The invention pertains to oil well production tubing strings wherein a wall packer is used to close the annular space lying between the tubing string and the surrounding well casing.
The primary object or" the ydevice is to provide a short tubing section or sub which may be installed directly above the well packer, so as to form a continuation of the string, such section containing lateral fluid ejecting perfcrations for washing above the packer, and also containing means for selectively opening and closing such pericrations. Y
A further object is to provide a device of this class which is positive in action, simple in operation, and` comparatively cheap to manufacture.
Another object is to provide a device which may be used repeatedly.
Other objects will be apparent from the following description when taken in conjunction with the accompanying single sheet or drawings, wherein:
Figure 1 is an elevational view, partially in vertical section, showing the device in open or un-set condition; and,
Figure 2 is a similar view showing the device in closed or set condition.
Like characters of reference designate like parts in those gures of the drawings in which they occur. e
In the drawings:
The reference numeral I indicates, as a Whole, a tubular upper head having an axial bore 2 and an exteriorly threaded pin 3 whereby'it may be attached to the lower end of a tubing or pipe string, not shown.
The pin 5 has an integral depending tubular sleeve portion il having therearound an exterior upwardly facing annular shoulder i5. The lowermost portion of the sleeve is formed to produce a downwardly tapered portion or lip t which terminates in an annular end l.
The device further includes: a metal ring 8 which surrounds the sleeve Il above the shoulder 5, a tubular body S which is welded as indicated at l0, to the lower end of the ring 8, the lower end of the body being provided with internal threads l l; a lower head l2 which is tubular, and which terminates in a threaded pin I3 by which it may be connected to the upper end of a packer mandrel it.
The upper end of the head l2 is threaded into.
the threads il of the sleeve 9, and is also provided with internal threads I5 for engaging the lower end of an upwardly projecting guide-sleeve it, The guide-sleeve It extends upwardly Within 2 the sleeve portion @i of the head i, and has a sliding working t therein.
The body is provided with a plurality oi through ports or perorations il, and the guidesleeve i6 is provided with a similar plurality of radially spaced through perforations i8.
Nesting snugly between the inner surface of the body e and the outer surface of the guidesleeve It, there is provided an annular resilient sealing element i9 which seats upon the upper end 20 of the lower head i2. A metal split follower ring t! provided upon the upper end of the sealing element i9.
The inner surface of the sealing element I9 is iiared upwardly to coincide with the taper of the portion or skirt e of the head portion ll.
The arrangement is such that when the head i is moved downwardly within the body 9, the tapered portion 6 enters thesealing element I9 and presses it outwardly into positive sealing engagement with the inner surface of the body Si. When the head l is at the lower end of its travel, the sleeve portion l thereof resides between the perforations ll and i3 and acts to effectually close communication therebetween.
When the head l is at the upper end of its travel, the lower end 'i of the sleeve portion 6 lies above the perforations ll and I8.
In order to normally hold the head l at the upper end of its travel, the wall of the body 9 is perforated, and the wall of the sleeve portion 4 is bored transversely about half way through in a plurality of places, and shear pins 2l are driven therein to anchor the two elements against relative vertical movements.
When it is desired to set the well packer in a cased well, the device and the packer are assembled in the condition illustrated in Fig. l, and are lowered into the well on a string of drill-pipe or tubing, not shown. During the lowering operation, communication between the perforations I'l and I8 is open. In setting the packer, it is necessary that the packer expanding mandrel lll be urged violently downward. When this is done, the shear-pins 2l are sheared, and the tapered portion 6 of the head l is lowered into expanding conta-ct with the sealing element i9. Communication between perforations I8 and il is therefore efectually closed during the time the packer remains set in the well.
When it becomes desirable to remove the packer from the Well, the rst lifting movement of the tubing string will lift the tapered portion 6 out of the sealing element l 9, and will raise the sleeve portion from between the perforations ll and i 8, thus opening communication between the two perforations.
Should it then be found that the packer is stuck, due to a deposit of residue thereabove, wash-out circulation may be accomplished by forcing uid downwardly through the pipe string to the bore 2, from whence it will be ejected into the well kcasing through the perforations I8 and l'l so that the deposit may be washed away.
The pins 2l must be replaced before the tool is again run into the well casing.
Obviously the invention is susceptible to some change cr alteration without .defeating vits practicability, and I therefore do not wish to be cone lined to the preferred embodiment `shown in the drawings and described herein, further that I am limited by the scope of the appended claims.
l. A washout device for installation in a tubing string at a point directly above a well packer, having in combination.: fa tubular upper head having its upper end adapted for attachment :to the vlower end of a section .of production tubing to form a continuation thereof; two noncentric bodies telescopically contacting the lower portion of the upper head, .both exterorly yand interidrly, and slidable vertically with relation thereto; normally .open outlet por-ts in the walls of .said bodies for exhausting a washing fluid from Vthe innermost body, said ports adapted to be closed by downward movement ci the upper head; means for limiting vertical movement of the bodies; a lower tubular head carried by the lower ends of said bodies and adapted for attachment to the upper end of a packer; and aresilient annular sealing element supported by the lower :head between the lower ends koi the tubular bodies for sealing with the lower end .of the upper head, when it is at the lower end of its travel.
2. A washout device for installation in `a tub- 4, ing string at a point directly above a well packer, having in combination: an upper tubular head adapted at its upper end for attachment to the lower end of a section of production tubing to form a continuation thereof; a first tubular body telescopically surrounding the head and slidable vertically with relation thereto; a second tubular body slidably fitted within the head in concentric relation to the rst body; interengaging,
kmeans carried by the head and one of the bodies for limiting downward movement of the head; a lower tubular head carried by the lower ends 0i? said bodies, and adapted at its lower end to connect the upper end of a well packer; communieating 'lateral ports '1in the two bodies for exhausting a washing lu'idvfrom the innermost body; an upwardly flared tubular packing element of resilient material mounted on the lower head, and lying in the annulus between the two bodies and the sleeve; and a downwardly tapered portion on the ,lower end Vof the upper head for entering :and expanding the packing,
,3. Structure as specified in claim ,1, and shear means for normally hold-ing the upper head at the :upper end of its travel.
.4. :Structure as specied in claim 2, and shear means :for normally holding the upper head `at the 11p-pei' end of its travel.
LOUIS J. vBIRDVS/ELL.
References Cited in the file of this patent UNITED STATES PATENTS Num-ber Name Date 53,283 Firmenich Mar. 2), 1866 871,258 Criswell Nov. 19, 1907 2,214,555 Hayward Sept. 1-0, 1940 2,478,350 Wirz Aug. ,9, 1949 2,495,642 Penick Jan. 124, ,1950
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|U.S. Classification||166/184, 251/145, 251/343, 277/339, 166/334.4|
|International Classification||E21B34/00, E21B34/12, E21B37/00|
|Cooperative Classification||E21B34/12, E21B37/00|
|European Classification||E21B34/12, E21B37/00|