US755180A - Wall-packer for oil-wells. - Google Patents

Description

PATENTED MAR. 22, 19.04. E. SMITH & W. WRIGHT.

WALL PACKER FOR OIL WELLS. APPLICATION-FILED AUG. 1a. 1903.

N0 MODEL.

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Patented March 22, 1904.

PATENT OFFICE.

HARRY SMITH AND WILLIAM WRIGHT, OF FRANKLIN, PENNSYLVANIA.

WALL-PACKER FOR OIL-WELLS.

SPECIFICATION forming part of Letters Patent No. 755,180, dated March 22, 1904.

Application filed August 13, 1903- To all whom it may concern:

Be it known that we, HARRY SMITH and VVIL- LIAM WRIGHT, citizens of the United States, residing at Franklin, in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Wall- Packers for Oil-Wells, of which the following is a specification, reference being had therein to the accompanying drawing.

Our invention relates to improvements in wall-packers for oil-wells, and will be fully understood by a reference to the accompanying drawing, which forms a part of this specification, and in which the figure is a side elevation showing one side of the packing in section and disclosing reinforcements which are contained within the structural walls thereof. a

The object of our invention is to provide a wall-packer which is adapted to be attached to a section of tubing or casing and to be composed of such a composition of rubber as will not rapidly deteriorate by immersion in crude petroleum and salt water and to reinforce the same in such a manner as to produce a practically indestructible packer and one which, owing to its peculiar structural shape and the method of attaching same to the tubing or casing, may at any time be withdrawn from the,

well without injury to the packing or damage to the wall of the well.

Our packer is composed of a cup-shaped portion 1, open at the botton and-extended into a sleeve 2, whose inner diameter is approximately the same as the outer diameter of the tubing or casing to which it is attached. At or near the upper edge of theoup 1 and cast within the structural wall is a non-elastic metal ring 4, which is for the purpose of preventing said upper edge from expanding when it is in service and 'to allow the packer to be withdrawn from the well without the danger or possibility of its upper edge impinging with the wall of the well or becoming engaged with the joints in the casing which surrounds the same. If the upper edge of the packing were free to expand, it would bear against the surrounding wall or the casing, as the case might be, when withdrawn from the well in such amanner as to be very likely to cause the'packing to buckle or collapse Serial No. 169,320. (No model.)

downward and become so firmly wedged between the tubing to which it is attached and the wall of the well as to wholly destroy the packing, damage the surrounding walls, and possibly cause the tubing to become stuck in the well in such a manner as to make it very troublesome to withdraw the same. Below the reinforcement 4 the packing is elastic and freeto'e gpand. Near the bottom of the packer within its structural walls and also in sleeve 2 are additional non-elastic reinforcements 5, which prevent the sleeve from being forced away from the tubing byeither the pressure of waterwithin the cup or the pressure of the fittiiigs 6 and 7, between which the sleeve is he The tubing or casing 3, upon which the packer is placed, is externally screw-threaded for a considerable distance at one end, and

thereon is screwed a collar 7 The tubing is then inserted into said sleeve from the cup side, and upon the end which projects from the bottom of the sleeve 2 is screwed another collar, 6, which bears against the lower end of sleeve 2 in such a manner as to cause the sleeve tobe firmly clamped between said collars 6 and 7 The reinforcements 5 within said sleeve prebe it understood, sleeve 2 in no way serves as a packer, but is adapted solely to the purpose of attaching the cup or packing member of our device to the tubing or casing.

Sleeve 2 tapers downwardly, and upon the outside thereof at its lower smaller diameter is placed a metal collar 8, which fits closely upon the sleeve, and as an additional precaution against the outward bulging of said sleeve said collar may be driven firmly upon the upper larger portion after the packing has been placed in position upon the tubing'or casing, as it is readily apparent to one skilled in the art to which this device belongs that it is equally applicable to either tubing or casing and, further, that if it should be found necessary or desirable so to do several sections of tubing, with a packer secured to each one, could be secured together, forming a se-- ries of packers.

We are aware that certain Letters Patent of the United States, numbered 49,783, and dated September 5, 1865, were granted to one John Parham, Jr., in which an elastic cupshaped packing is shown; but we do not claim, broadly, a cup-shaped packing; neither do we broadly claim a packer having reinforcements contained within the structural walls thereof, as we are aware that a packer having reinforcements incorporated within its walls is shown in certain Letters Patent of the United States, numbered 248,229, dated October 11, 1887, and granted to one Lyman Stewart; but we do claim a cup-shaped packer having a reinforced or non-elastic sleeve whereby it is adapted to be attached to the tubing or casing and having its upper edge rendered nonelastic, as shown, for the purpose set forth.

Having thus described our device, what we claim as new, and desire to secure by Letters Patent, is

1. In a wall-packer for oil-wells, a cupshaped packing portion composed of elastic material, with its upper edge reinforced in such a manner as to render the same nonelastic, the lower portion of said packing extended into a sleeve, whereby the packer is adapted to be attached to the tubing or casing.

2. In a wall-packer for oil-wells a cupshaped packing portion, composed of elastic material, the lower end of said packing portion being extended into a sleeve, whereby said packing is adapted to be attached to the tubing, or casing; the walls of said sleeve being rendered non-elastic by reinforcements embedded within the structural walls thereof, in combination with means adapted to prevent said sleeve from expanding between said reinforcements.

In testimony whereof we afiix our signatures in presence of two witnesses.

HARRY SMITH.

WILLIAM WRIGHT.

Witnesses:

E. R. INMAN, B. L. RHoADs.

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