US1501481A - Packer - Google Patents

Description

C. E. FRAZIER PACKER Filed Nov. 24 1923 alto-z wag Patented July 15, 1924.

UNITED STATES 1,501,481 PATENT OFFICE.

CHARLES E. FRAZIER, 0F DALLAS, TEXAS, ASSIGKOB TO THE GUIBEIBBON CORPORA- TION, 01 DALLAS, TEXAS. I

IPAOKEB'.

Application filed November 514,1828. Serial No. 676,782.

To all whom it may concern:

Be it known that I, CHARLES E. FRAZIER, a citizen of the United States, residing at Dallas, Dallas County, Texas, have invented a certain new and useful Improvement in Packers, of which the following is a specification.

My invention relates to an improvement in packers for use in deep wells. It pertains more particularly to so-called flow packers.

It has for its object the provision 0 a packer which will serve to prevent the passage of fluid under pressure upwardly around the pump tubing inside the casing.

Referring to the drawing herewith, Fig. 1 shows a central longitudinal section through a well casing havingapump tubing therein partly in elevation with the invention thereon. Fig. 2 is a transverse section on the plane 2--2 of Fig. 1. Like numerals of reference designate like parts in both the views.

In well drilling, it is sometimes found that, when the producing sand is reached,

" insuflicient gas pressure is obtained to cause the fluid in the hole to flow from the top thereof. It is therefore of advantage to place a pipe of smaller diameter inside the casing and to close the space between the tubing and casing, by means of a packer so as to confine the pressure to the interior of the tubing.

I have provided a packer which is particularly adapted to this purpose. In Fig. 1, the casing is designated at 3. Inside the said casing is a tubing 4 upon which is mounted the flow packer constituting our invention. A special short length 2 of pipe is reduced in diameter at its upper end 5 to provide a seat for a cup 6 of rubber or other flexible composition. The shoulder 7 formed at the lower end of the reduced portion 5 furnishes a seat for a ring 8 adapted to extend beyond said shoulder and form a support for the base portion of the cup 6.

The cup is held downwardly upon the ring 8 by means of a thimble 9 which is formed in the shape of an inverted cup, the upper end of which fits closely about the portion'5 of the tubing. The coupling 10 which secures the pipe 2 to the tubing may serve as a clamp to force the thimble downwardly against the cup6 and hold it clamped firmly inposition.

The outer surface and lower edge of the cup 6 are protected by means of a series of spaced wires or rods 11. To receive these rods the outer face of the cup is grooved as shown at 12 in Fi 2, thus allowing the outer surface of t e rods to come flush with the outer surface of the cup. The upper ends of said rods are bent inwardly and fit within recesses 13 formed in the cup to receive them.

The said rods or wires 11 are bent to the shape of the cupand are inclined in-' wardly below the edge of said cup to a point spaced somewhat from the pipe 2 and then are extended directly downward and the lower ends are fitted within opening 14 in a ring 15 secured to the pipe 2. Below the ring, the rods are bent outwardly to limit the movement of the rods relative to the ring.

It will be noted that the lower end of the cup is formed with a cylindrical outer surface- 16 adapted to contact with the inner face of the casing. This will serve to form a closure between the tubing and the casing which, under pressure of the fluid below the cup will be suflicient to prevent the passage upwardly of fluid outside of the tubing.

In the use of this device, the packer will be secured upon the tubing at the desired point and when thus mounted and assemled, as shown in the drawing, the tubing will be gradually lowered into the well until the desired point is reached. The pressure of gas and liquid below the. acker will tend to expand the cup outward and by thus closing passage for the flui outside the tubing, all escape of gas or oil will take place throu h the tubing alone. The flexible cup 6 W5 the thimble 9 and partly by the rods 11 and the interior of the casing. If it is found that the well-will not flow, the pump may be inserted into the tubing and the presence of the packer will assist in the operation of the pump by directing all fluid upwardly into the pump barrel.

If it is desired to withdraw the tub from the well, the tubing may be rai ---l in the usual manner and the flexible cup 6 will automatically contract as it is drawn upwardly, thus allowing free passage through any fluid which may accumulate above the packer.

The wiresor rods 11 serve not only to 1 be supported partly by rigid material a support the cup, but protect it from wear or mutilation while it is being introduced 'into the hole or withdrawn therefrom.v

It will be obvious that this type of packer is simple and cheap in construction and not sub'ect to mutilation or damage 1n use as is t e ordinary IPacker. Further objects and advantages W1 be apparent to one skilled in the art without further description. While I have described the packer as ada ted for pumping purposes it is obvious t at a the device will be capable of a wide ap lication, and I do not wish to be confin to anIy:I particular use to which it is put.

aving thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A packer for well operations comprising a cylindrical supporting member, a

shoulder thereon, a rm on said shoulder, a flexible downwardlyaring cup supported on said ring; a reinforclng thim e of ove said cup, and rods embedded in the outer surface of said cup,

extending below said cup and having ening .a supporting member, a downwardly flaring cup of flexible material on said su port, a thimble on the upper end of sa1d cup, means on said support to clamp said atoms:

cup and thimble firmly thereon, and resihent protecting means on the outer face of said cup.

4. A packer for well operations comprismg a"supportirii1g member, a downwardly flaring cup of exible material thereon, a rigid thimble over the upper end of said cup, means to clam said cup and thimble on saidsupport an a series of protecting r s engaging between said cup and thimble and projecting downwardly belowv said cup.

5. A well packer comprising a supporting member, a downwardly flaring cup of flexible material thereon, means to clamp said cup in position on said member, and a series of resilient members secured adjacent the base of said cup, acting to protect and en port the outer face of said on and extending beyond the lower edge 0 said cup for the purpose stated.

6. A well packer for use in a well casing comprising a supportin tubular member, a flexible, downwardlyarin cu secured thereon, a reinforcing thimb e above said cup, a series of 'rods secured between said cu and thimble and extending along said tu ular support to which said rods are slidably attached.

7. A well packer for use in a well casing, com rising a supporting tubing, a downwar 1y flarin cup on said tubing adapted to contact wit sa1d casing, means to clamp said cup on said tubin and rods extending along the outerface 0 said cup to support and protect the same.

In testimony whereof I hereunto aflix my signature this 19th day of November, A. D.

CHARLES E. FRAZIER.

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