US235972A - Oil-well packer - Google Patents

Description

L.. STEWART. Oil Well Packer.

Patented 1880.l

(No Model.)

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` N. PETERS. FHOO-LITHOGRAPHER. WASHINGTON. D. C.

UNrri-in rafrns Ernten..

A'rnNr OIL-WELL PACKER.

SPECIFICATION forming part of Letters Patent No. 235,972, dated December 28, 1880.

Application filed October 28, 1880, (No model.)

To all whom it may concern Be it known that I, LYMAN STEWART, a citizen ot' the United States, residing at Titusville, in the county of Crawford and State of Pennsylvania, have invented certain new and useful Improvements in Oil-Well Packers; and I do hereby declare the following` to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part ot' this specitication.

This invention relates to a new construction of oil-well packers, adapted more especially to be used in connection with tubing through which oil is pumped from the well; and it consists, essentially, in interposing betweenone of the tubing-sections and the outer cylinder' or sleeve of the telescopic jointwhich unites the upper and lower sections of the tubing a packing material for the purpose of preventing leakage at that point.

I into the cylinder or sleeve C.

Figure l is avertical section of a packer embodying my invention,vand Fig. 2 is a similar section of a modification.

Referring to Fig. 1, A A' represent the lower section of the eduction-tube, which usually eX- tends to the bottom of the well.' The part A' is connected with the part A by means of a coupling, B, which is expanded at its upper end into a lange, B', these parts Al B B' constituting a support for a rubber annulns, D, which is mounted thereon, and is thereby maintained in proper position in the well While being forced against the side of the well by the action of devices whichl will now describe.

C' C2 is a hollow conical wedge sliding on the upper end of tube-section A', which projects a short distance above the rubber annulus D. 'The upper end of this wedge is chambered and screw-threaded to receive a cylinder or sleeve, O, which is connected by means of a collar or reducer, e, withthe upper section, E, of the eduction-tube, which is continued, by the addition of successive lengths, to the top ofthe well.

a is a rim or ange screwed upon the end of tube-section A'. c is a collar or ring screwed c' is a packing material interposed between cylinder C and the tube-section A', and c2 a rim or ring serving as a followerto suitably compress the packing material c'. This follower may be screw- 55 threaded externally and screwed into cylinder C, or it may be smooth on its outer surface and forced against the packingmaterial by means of an interior shoulder ot' the wedge, as indicated in the drawings. The packing c' may 6o be fibrous, or composed of rubber, leather, or such other material as may be desired.

From an examination of Fig. l it will be seen that as the wedge G' C2 is forced into the annulus D by the weight ot' the upper section, 65 E, of the eduetion-tube, the packing material c', which is attached to the cylinder C, and is thereby connected with the tube-section E, and rises and falls with said section, slides in contact with the annulus-support, and thus pre- 7o vents leakage between said support and the upper tube-section.

As this packer is intended more particularly for use in connection with a pumping or working barrel near the lower end of the eduction-tube, it will be seen that uid can be pumped out of the well without leakage at that part ot' the packer which constitutes the telescopic joint.

In Fig. 2 is shown a packer embodying the 8o invention in` a modified form. Referring to this gure, it will be seen that the parts are identical in structure with those above described, eXcept that the packing c', instead of being attached to the cylinder C, and rising and falling with the upper section, E, is attached to the annulns-support by means of a ring or flange, a, which is screwed to the upper end of the tube-section A', and a similar ring or iiange, c3, which is also screwed upon 9ov the tube-section A' near its upper end. In this latter construction, when the Wedge C' C2 is forced into the annulus D the packing material c' remains stationary, the inner surface ofthe cylinder C sliding in contact with the packing material. It will be seen, however, that in both constructions the packing material c' is located in the same position relative to the other parts of the packer-that is to say, between the cylinder C of the telescopic joint roo and the adjacent tube-section--and is pressed against'the inner wall of the cylinder and the outer surface of the tube-section by means of rims or flanges, which are also interposed between said inner surface of the cylinder of the telescopic `joint and the adjacent section of tubing.

I ain aware of Patent No. 56,234, to O. B. Latham, dated July l0, 1866, and hence do not claim anything shown in said patent; nor do I claim in this patent anything except the invention specilcally set forth in the claims, preferring to claim all other patentable features in another application for oil-well packer which I have filed.

What I claim is- 1. In an oil-well packer, the combination of the following elements, viz: a lower section of an @duction-tube, an upper sliding section of eduction-tube, a cylinder adapted to connect the upper and lower sections of the eduotiontube, a support for a rubber annulus, mecllanism for forcing the rubber annulus against the wall of the well, two rims or flanges surrounding a section of tubing which projects within the cylinder, and a packing material, c', secured between the rims or lianges within the cylinder, substantially as set forth.

2. In an oil-well packer, the combination of the following elements, namely: a lower seetion of eduction-tube, an upper sliding sec tion of eductiou-tube, a cylinder adapted to connect the upper and lower tube-sections, a support for a rubber annulus, and a packing, c, connected with the upper tube-section by suitable means, so as to rise and fall therewith, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

LYMAN STEWART.

NVitnesses:

JOHN ONEILL, H. H. DOUBLEDAY.

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