US1736254A - Seater and packer - Google Patents

Description

Nov. 19, 1929. R. l.. DAVIS SEATER AND PACKER zsnee'ts-sneet 1 Filed March l2, 1928 @wi/Wmo l ma Nov. 19, 1929. y R. L. DAVIS 1,736,252@- SEATER AND PACKER Filed March 12, 1928 2 Sheets-Sheet'Q Patented Nov. 19, 1929 UNITED RY L. DAVIS, 0F WHEELING, WEST VIRGINIA, ASSIGNOR, BY DIRECT A ND MESNE- Aevict'.

ASSIGNMENTS, T0 THE OIL RECOVERY CORPORATION, OF WHEELING, WEST VIR- GINIA, A CORPORATION 0F WEST VIRGINIA SEATER AND PACKER Application led March 12, 195:28.` Serial No. 261,110.

The invention relates to a seater and packer for the purpose of totally or partially sealing or packing olf oil Well or gas Well tubing, pipes or casings, or for use with any well or at any other location where it is necessary to s eal or partially seal a hole.

- The invention embodies an expansible sleeve of rubber or the like to tenaciously engage the well casing or similar part, and it is one object of said invention to provide a new and improved construction for expanding said sleeve into tight contact with the casing or the like. In providing for this expansion of the sleeve, the body of the device upon4 Which the sleeve is mounted, is provided with an expansible tubular portion surrounded by the sleeve and extending between upper and lower tubular body portions of rigid nature, and means is provided within said expansible tubular body port-ion for expanding the same to thereby expand the sleeve; and it is a further object of the invention to utilize the expansion of the tubular body, to tenaciously secure the lower end of the expansible sleeve to the lower rigid body portion.

Another aim of the invention is to form the above-named expansible body portion of an annular series of resilient strips, and to make novel provision for connecting these strips with the upper and lower, rigid body portions.

A further objecto the invention is to provide a device of the class described in Which expansion' of the sleeve for engaging the casing or the like, is effected by relative slid` ing of the body carrying said sleeve and an expanding member within said body, and. to make novel provision for holding these members against accidental return from sleeve-ex panded position. y

A still further object is to provide a construction Which permits relative sliding of the body and the expanding member in sleeve' contracting direction, under force, thus per-V erated, and will be of exceptional eiiiciency.

lfVith the foregoing and minor objects in view, the invention resides in the novel sub- )ect matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawings.

Fig. 1 is a longitudinal sectional view partly in elevation showing a seater and packer constructed in accordance with my invention.

Fig 2 is a central longitudinal sectional vieu' as indicated by line 2-2 of Fig.` l.

Figs. 3, 4, 5, 6 and 7 are horizontal sectional views on the correspondingly numbered lines of Figs. l and 2.

Fig. 8 is a side elevation partly broken away and in section,'showing the main body of the l expanding member.

Figs. 9 and l0 are vertical sectional views 'of two of the sections of the lower, rigid portion of the main body of the device.

Fig. ll is a vertical sectional view of the upper, rigid body portion. 'A

Fig. l2 is a horizontal sectional view through one of the sectional, spring-pressed rings which are instrumental in holding the relatively slid. ble parts of the device against accidental return to sleeve-contracting posi tion after being moved to sleeve-expanded position.

. Fig. 13 is a detail sectional View on the correspondingly numbered line of Fig. 12.

Fig. 14 is a vertical sectional view showing a diierent form of expansible sleeve.

Fig. 15 is a. horizontal sectional view on line 15-15 of Fig. 14.

The form of construction herein illustrated, l

A against accidental return tou sleeve-contractsection 17 and the body portion B1 and is 'pro-v ing osition, after movement to the position at w ich it expands and holds the sleeve S in expanded condition.:v i

' The portion B1 of the body is the upper most portion thereof, being in" the' form'of a short length of tube' internally contracte-d somewhat at .its upper. end as denoted at 15.

' The body portion B2 is in the form of a resilienttube preferably formed of spring met` al and of longitudinally split form to permit expansion and contraction. In the construe tion disclosed, this tube B2 is downwardly tapered to a plane near its lower end, below which planeit is enlarged as at 16and is received within the vupper end of the lower body portion B3',the latter being of tubular form. This lower body portion B2 preferably consists of a relatively short, upper tubular section 1'7, a comparatively long tubular section 18 below said sectiony 17 a tubular couplin 19 connectingthe sections 17--18, and

a tu ular terminal 20 carried by the lower end of the section 18.

.Immediately above the enlarged lower end 16 of the tube B2', this tube isinwardlyspaced from the surrounding portion of the tubular section 17 above described, providing an annular space 21. The :expansible sleeve S of rubber or other desired material, surrounds the expansible tube B2 between the vided at its lower end with a flange 22 which projects into the space 21. Hence, upon expansion of tube B2, not only vis the sleeve S expanded, but the flange 22 of this sleeve is 4 tightly clamped between the lower portion of said tube and the upper end of the section- 17. By preference, this section is provided theflange 22, thus forming an even more the lower portion B3 of the body.

with an inwardly projecting rib 23 to bite into tenacious connection between the` sleeve S and I prefer to form the tube B2 of a plurality of individualspring metal strips 24, disposed in an annular series and all extending longi- .tudinally of the body with their upper and tube B2 and the sleeve'S, forcing the latter into tight contact with'the casing or the like L C.. Terminal 2() may rest upon anyvdesired 'solid' support and it is shown internally threaded as at 27 so that it may be connected with a downwardlyA projecting pipe leading for instance to a suitably anchored strainer or itself perforated to admit liquid. f j

The expander E, in the construction shown,

is formed primarily from a .single metal tube having a tapered portion 28 Within the tube B2, for expanding the latter when said expander is forced downwardly.I The upper end of this expander is preferably provided 70 with screwthreads 29, permitting the attachment thereto of a string of tubing or piping,

or a. portion of an oil pump, which pump l may be in any desired elevation above the seater and packer herein described. The lower end of the expander E carriesa tubular head 30, in the form of the invention herein disclosed, said head being disposed within the i body section 18. vIn theconstruction illusf` trate'd, this head carries means M "above 80 briefly referred to. Preferably, this means consists of a plurality of sectional', transversely split, channel-shaped rings 31 received in circumferential grooves 32 in the head 30 and pressed constantly outward by 85 annular springs 33. The means Mv preferably consists of alternate, circumferentially extending ribs 34 and grooves 35 at the interior of the body section 18, all ribs4 and ygrooves being suitably curved to permit the means 9o M to readily move thereover when the expander E is either forced downwardly to expand the sleeve S or is forcibly pulled up/ wardly to contract said sleeve. After setting of the device by depression of-'the expander 95 E however, the means M-M co-operate in holding the expander against accidental return to sleeve-contracting position. While these means are preferably of the natures described, they could be of other desired forms 100 and obviously the shoulders rovided by theribs 34 need not necessarily el of the exact configuration herein. disclosed. Y

With the expander E raised to the limit permitted by the head 30 and the coupling 105 19, the `entire device islowered into the well until the main body B1- 2-B, comes to rest, provision having been previously made for arresting the descent of this body at the pander E is now effected, with the result that it expands the resilient tubular body portion B2, thereby also expanding the sleeve S into tight contact with the casing or the desired depth. Further descent of the.. ex- 11o like C. Duringl this descent ofthe expander 115 E, the means M successively engages the 'ribs and grooves 311-35 and these means serve to hold the .expander against accidental ascent when moved to its final position.

Nevertheless,if the seater and packer is to be removed from the wellor isto be set at another depth, upward pulling of the expander4 E, is permitted by sliding of the means M over the ribs and grooves, allowing movement of said expander to a position at 125 which it leaves the sleeve S free to contract and disengage fromthe casing or other wellV or pipe part C.

If the device is used under. conditionswhich u necessitate that some gas be permitted to es-' l cape from below the sleeve S, this sleeve will be provided with longitudinal ports 36 from end to end, said ports being provided with` metallic liners 374which. 'prevent them fromf being closed upon expansion of the sleeve. If the device is tobeused under conditions which require that no gas shall escape through the sleeve S, then this. sleeve will be of the solid,.imperforateorm shown in Figs.

14 and 15. Ordinarily, the entire interior of the device is left open from end to end to permit discharge of liquid. However, ifa total seal is to be effected, any suitable plug (not shown) may be threaded into the lower end of the terminal 20.

l0n account of the advantageous results obtainable from the details disclosed, they are preferably followed as above stated However, attention is again invited to the factl that-within the scope of theinvention as claimed, variations may be made.

I claim 1. A device of the class described comprising a tubular body having an expansible portion between its ends, an expansible sleeve surrounding said expansible bodyv portion, an elongated member slidable in saidtubula'r body and having means for expanding said expansible body portion .upon downward sliding of said member, and .a spring-pressed -detent on said elongated member below said expansible body portion, saidl tubular body having longitudinally spaced internal shoulders below said expansible ortionv with which said detent is successive y engageable as saidmember is moved downwardly, said detent and shoulders holding said member against accidental return movement. 2. A device of the class described comprising a tubular body having an expansible portion between its ends, an expansible sleeve surrounding said expansible body portion, an elongated member slidable in said .body and'havingv a peripheral groove below said expansible' portion `thereof and a self.- expanding ring in said groove projecting be ondthe periphery of said member, said tu'b'ular body being provided .with a plurality of internaly annular ribs' spaced apart longiportion of the latter and successively engaged by said ring when saidv elongated tudinally of said body below said expansible ing A'separate upper and lower tubular body ing separate upperand lower tubular body sections spaced apart and of rigid inexpensible nature, a resilient longitudinally split tube extending between and connected to said body sections, said tube being downwardly tapered, and a downwardly tapered expandling member received in said tubefor expand-u ing the latter to thereby expand said sleeve.

5. 'A device of the class described comprising upperand lower tubular body portions portions each having a plurality of circumferentially spaced slots, an annular series of:

resilient strips extending between and having their ends received within said body portions, the extremities of said strips being turned outwardly in said slots, an expansible sleeve surrounding said series of strips, and means within said series of strips for outvardlyI springing the latter tod expand said s'eeve.

spaced apart and of rigid nature, said body 7 5 l so f 6. A device of the class described comprising upper and lower tubular body portions spaced apart and of rigid nature, said body portions each having a plurality of circumferentially spaced slots, an annular series of resilient strips extending between and having their ends received within said body portions, the extremities of said strips being turned outwardly in said slots,said` strips being disposed in'downwardly converging relation to points near their lower ends to provide a downwardly tapered tube, a downwardly tapered'expanding member within said tube for expanding the latten-and an expansible sleeve surrounding said tube to b e expandedv thereby.'

device. of the .classdescribed comprissections 'spaced apart and -of rigid inexpansible nature, a resilient expansible tubefextending between and .connected tof said vbody sections, the .tube being vreceived within said lower body .section and an an-v nular space being providedA between saidtube and the surrounding upper end of said lowerV body section, an expansible sleevesurround-- ing said tube and having ailange extending `into the aforesaid space, and means for expanding saidjtube to clamp said flange and 8. A device of the class described compris- .ing` upper and lower tubular body sections vspaced apa'rt and of rigidinexpansible nature, a longitudinally split expansible tube .extendingbetweenl said sections and received at its ends therein, said ends of said tube being provided with outstanding flanges and said body sections having means receiving said sections, an expansible'sleeve surround-' ing said tube between said body sections, and means within saidtube for expanding it.

)In testimony fixed my signature.

whereof I havehereunto-af-

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