US249228A - Oil-well packer - Google Patents

Description

2 Sheets-Sheet V1.

(Model.)

, J. A. DOWE-R.

OIL' WELL PAAGKBR.

Patented Nav. '8, 41881.

2 Sheets-Sheet 2. i

J A. DOWER.

oIL WELL LAGLER.

(Model.)

Patented Nov. 8,1881.I

UNITED STATES PATENT OFFICE.

JonN A, Downs, oF frrrusvinnn, PENNSYLVANIA.

c oiLfwELLPACKEa SPECIFICATION forming part of Letters Patent No. 249,228, dated November 8, 1881. Application filed March 25, 1881. (Model.)

To all whom t'tmcy concern:

Be it known that- I, JOHN A. Downs, of Titusville, in the county of Crawford and State of Pennsylvania, have invented a new and useful Improvementin Packers for Oil or Artesian Wells, of which the following is a specification.

My invention relates to those packers in oilwells placed around the tubing at or above the top of the sand or oil-producing rock, the ob- Io ject of the packer being to prevent the free escape of the gas around the outside ofthe tubing and utilizing it to force the oil up through the tubing, producing whatis called flowing.7 The tubing has a telescopic joint, and with a I 5 collar upon both the upper and lower s ection,the packing rim or cylinder being placed between the two collars and distended by the weight of the upper section ot' tubing pressing upon it, the packing-ring being supported by the lower 2o section, which rests on the bottom of the well. As a matter of course, when the packer is in use the water and debris collect in the well above the packer and create a great pressure upon it, which has to be overcome when it is necessary to remove the tubing from the well. The object of my invention is to enable me to relieve the packer from that pressure by adl mitting the iiuid to the well before the packer is started from its place. This I accomplishV 3o iu the manner illustrated in the drawings, in

which- Figure 1 is a section of the tubing, telescopic joints, and packer as suspended in the well before reaching the bottom; and Fig..2 a section of the same when in place and resting on the bottom of the well. Fig. 3, Sheet 2, is a section similar to Fig. 2, but with the addition of a working barrel or pump attached to the upper section of tubing, to illustrate the method 4o by which the well, packed for iiowiug, may be pumped without removing the packer.

The same letters are used in the different [i gures to designate the same parts. y

A represents the walls of the well; B,.the 4. 5 lower section of tubing, which rests on the bottom of the well, and which is perforated to al low the iiuid to enter the tubing; C, the upper section of tubing, reaching to the mouth of the well; D, a short section of slightly greater diameter inside than the outside diameter of C, and through which G plays; E, a short and still larger section, int-o which D plays freely,

` and which is iirmly connected to B by the reducer F. 0n the upper end of the section E is the collar Gr, supporting the leather cup H,

which Viucloses the lower portion of and sup ports the rubber or elastic ring I, which loosely surrounds the section D. On the upper end of the section D is the collar K, which collar is made conical at `the lower end, and is also recessed or grooved on its upper side to receive the elastic packing-ring M.

To the section of tubing Gis secured the coll lar N, having its lower edge tongued and fitted toten ter the groove onthe upper side of the collar K and rest on the packing-ring M.

In Figs. 1 and 2 are the holes or perforations O in the tubing G, just below the collar N.

'I o4 the lower end of the sections C and D are secured the collars P and R, which respectivel y engage with the lower end of the section D and the collar G. This admits of the suspension of the whole contrivauce from the section C of the tubing.

The operation is as follows: As theapparatus is adjusted and lowered into the well it is extended, as shown in Fig. l. end of the section B reaches the bottom, the section C following down, the tongue on the lower side of the collarNenters the groove on the upper side of the collar K and rests on the packing-ring M, thus tween the sections downward by the weight of the tubing,itforces the section D downward, forcing the cone on the lower side of the collar K inside the packing-ring I, compressing the packing,and expanding it and the leather cup H against the walls ot' the well, and ei'ectually cuttiu g oi any passage of fluid up or down. VWhen it is required to draw the tubing the section C is rst raised, disengagiug the collar N from the collar K,aud admitting the uid from the outside of the tubing to pass down between C and D, and also through the perforations `O into the tubing, thus filling the well below the packingring 1 and relieving it from the pressure, when the whole can easily be drawn from the well.

Some wellsneed to be pumped occasionali y, and to do this it is necessary to provide some escape for the gas, as well as to admit atmospheric pressure to the iiuid. Ordinarily it has been considered necessary to remove the packer to accomplishthis. "I accomplshitin the man- When the lower forming a tightjoint bet C and D. Still pressed IOO ner illustrated in Fig. 3, Sheet 2, which shows the same contrivance, except that a workingbarrel, S, is attached to the bottom end of the section C of the tubing, and the section E is made sufticientlylong to receive it. The openingsOin the sectionGare also omitted. When arranged for pumping the tubing C is raised, disengaging the collars K and N, when the gas escapes freely between the sections C and D, and the well pumps in the ordinary manner.

As a further advantage to be gained by my construction, the vertical play ot' the section C inside the section D, being entirely free from contact with the elastic packing-ring I, admits of jarring, if it is necessary to do so, in releasing and removing the packer.v

t l make no claim for the section D telescoping with the section E, nor for the collar' G, leather cup H, rubber packing-ring I, nor the cone on the lower part of the collar K, as all these have been previously patented or used.

I claim as my inventionl. In the tubing of an Artesian well, the seetion D, telescoping with the section E, thesection D having surroundingit the elastic packing-ring I, and with the collar K, in combination with the section C, telescoping with the section D, the collar N on the section C en gaging with the collar K on the section D, the

3. As a device by which Artesian or oil'wells packed for iiowing can be pumped without removing the packer, the upper section, C, telescopin g with the section D, which has the packing-ringvsurrounding it, an annular space being lei't between the two sections, and with the collar N upon the section C engaging with the collar K upon the section D, so 4that by slightly raising' thesection C a free passage is made for gas or fluid inside the packing-ring, suh- 'stantially as described, and for the purposes herein set forth.

JOHN A. DOWEYR. ln presence ot` SAMUEL GRUMBiNE, A. S. RALsrroN.

the p urposes

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