US823760A - Soft-metal wall-packer. - Google Patents

Description

UNITED STATES PATENT OFFICE.

JAMES T. CALLANAN, or ISARKERSBURG, WEST VIRGINIA, AssIGNoR To THE PARKERSRURG MACHINE COMPANY, or IARKERsBURG, WEST VIRGINIA, A CORPORATION or WEST VIRGINIA.

ASOP'T-NHETAI. WALL-PACKER.

No. 823,760. specification of stituted for rubber, which is now universally,l

used for making the water-excluding seal.

A further object is to provide a packer with compression-heads of lmproved form es`- pecially adapted for expanding the softimetal packing material.- l

In the accompanying drawings, Figure 1 is a vertical sectional view of my improved packer before'it has been'expanded, and Fig.

2 is `a similar view showing the same expanded.

Referring to the drawings, 2 desi ates'a tubular head forming the upper en I ofthe` packer which is secured to the lower end l of well-tube 3. Depending from head 2 is the tubular packer-body 4, which extends through bottom head 5, the lower extremity ofthe body being outwardly flanged at 4 to underhang downwardly-facili shoulderb in the vlower portion of head 5. y elow shoulder 6 the head is formed with ade endin internally-threaded rim l7, and uniting wlth the latter is the tubular member 8, into which the packer-body lowers when the packer is ex- Y braced by anded, 'as in Fig. 2. A 'reducer 10 at the ower extremit of portion 8 serves to connect anchor-tu e 11, which extends to the bottom of the well.' f.

Surroundin packer-body 4 is a sleeve or annulus 9, of Icad or other soft metal, which is normally of the same diameter as heads- 2 and 5, between which it is confined. The lowerportion of head 2 tapers inwardly and downwardly as shown at 2 where it Is'emthe upper end of the soft metal,

said slopm f or tapering extremity-being interru ted y annular groove or notch 2'? whic 1 interlocks with and secures a lfirm hold on the metal. The inner or upper end 5 of bottom lhead 5 is similarly tapered and em- Letters Patent. Patented June 19, 1906'.

Appuaaon mea october 12, 1904. serai No. 223.220:

braced by the lower end ofthe soft-'metal sleeve.

In operation the metal sleeve retains the shape Indicated in Fig. 1 until force or pressure is applied in such manner as to contract the space between heads'2 and 5. In placing the packer'in position anchor-tube 1l is of such length as to rest on the bottom ot' the well and position the packer at the point Where it is desired to locate the same. The anchor-tube thus forms a positive support for bottom head 5, and the weight of the rstring of tubing on upper head 2 causes the ment is resisted only by the soft metal, the

latter to move downward, as such movepacker-body 4 being free to lower into portion 8, as inFg. 2. The lead or other soft metal is thus caused to spread laterally against the `Wall ofthe well and to so flow as to solidly llthe space between the latter and packer-body 4, as shown in Fig. 2. While the s reading of the metal'is materially assiste by the tapered headsfthe invention is not restricted to the latter, as the metal would flow and pack in substantially the .same Way if the heads were of different form. It is` characteristic of lead and -other soft `metals that when subf'ected to pressure they will so flow as to so idly fill the spaces in which the are confined, and this principle is 'availed o in the present invention for pro-'- viding an'- absolutely solid packing. It Is in this essential prarticular that the invention differs widely om the well-known types of packers, in each of which the acking material consists of arublber sleeve. hen subjected to pressure, the rubber sleeve is expanded or forced outward at one or more polnt's in its length into engagement with the well-wall;

but it is well known that the action of rubber when'under pressure is such that it cannot be caused to flow and so changeits form as tosolidly fill the space to be packed. Furthermore, as lead 1s indestructlble the improved acker is absolutely permanent, whereas rubber deteriorates and must in time be replaced.

packer-body, separated heads on thepacker-v VMBC body, one movable toward the other,` the vend of one of said heads being reduced and notched j and a sleeve of soft metal surrounding thepacker-body between the heads and embracing the said reduced and notched head end. v

2. In a Wall-packer, the combination of a packer-body, a sleeve of soft metal surrounding the body, two oppostely-tapered packerheads at opposite ends of the sleeve, the

tapered yends ofthe heads being embedded in the soft metal, one of the heads beinff formed with a notch to interlock with the sotmeta, and means for moving one of said heads toward the other.

In testimony whereofl ax my signature in presence of tWo witnesses.

JAMES T. CALLANAN.

Witnesses:

J M. NESBIT, ALEX. S. MABoN.

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