US691129A - Casing-head for oil-wells. - Google Patents

Description

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1| uw" y Mumien @rares Parisivr risica JOI-IN 'W'. FBYE, OF OIL CITY, PENNSYLVANIA.

CASINO-HEAD FOR Oll =WELLS.

SPECIFICATION forming part of Letters Patent No. 691,129, dated January 14, 1902. Application tiled July 5,1901. Serial No. 67,120. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN W. FRYE, of Oil City, in the county of Venango and State of Pennsylvania, have invented a new and useful Improvement in Casing-Heads for Oil- We1ls, of which the following is a specification.

My invention is in the nature of a novel casing-head for oil-wells.

In oil-wells as generally equipped the tubing which extends down into the well is a rigid con* tinuation of the stand-pipe which rises above the easing-head into the derrick. It sometimes happens that a derrick will be blown down by the wind, and this breaks the tubing and allows the lower section to drop down into the Well, involving much time and trouble in the effort to recover it, and sometimes it is lost altogether. My invention is designed to prevent this; and to that end it consists in making the tubing which extends down into the well separate from the stand-pipe which rises into the derrick and providing a special construction of casing-head which holds the tubing in a suspended position and at the same time connects the tubing and stand-pipe with a closed joint, which permits a continuous flow of oil up through the same without waste, as will be hereinafter more fully described.

Figure 1 is a vertical section of my casinghead, and Fig. 2 is a similar View of a modiiication.

In the drawings, 1 is the casing-head, which is made of cast-iron and basan/internal screwthread at its lower end into which a wroughtiron sleeve or nipple 8 is screwed whose eX- ternal diameter is less than the internal diameter of casing, allowing it to slip into casing. The casing-head 1 also has an internal screw-thread at its upper end into which a reducer 2 is screwed, and which reducer at its upper small end receives the stand-pipe 6, that extends up into the derrick. 1

On the inner periphery of the casing-head l is formed an inwardly-projecting shoulder 4, which I provide for the purpose of forming a point of suspension for the tubing 7, that extends down into the well and which is wholly disconnected from and independent of the stand-pipe G. To suspend the tubing 7 upon this shoulder, I screw athimble or enlargement 3 upon the upper end of the tubbeneath the ring to make a tight j'oint, which closes the space above the ring and causes the tubing 7 to have through the neducer 2 a continuous and non-leaking communication with the stand-pipe 6. It will thus be seen that the tubing 7 is suspended bythe thimble or enlargement Sand theshoulder 4 of the casing-head, and if the stand-pipe 6 becomes broken from any cause the tubing 7does not drop down the well.

Just below the`shoulder 4 in the casinghead there are vent connections 9 to draw off gas.

In Fig. 2 Ishow a modification of myinvention applicable to the old-style casing-heads, in which the same reference-numerals indicate the same parts shown in Fig. 1, but in which the proportions are somewhat changed and the shoulder 4 is formed by a lower section lO.

Having thus described my invention,what Iclaiin as new, and desire to secure byLetters Patent, is-

1. A casing-head for wellshaving on its inner surface near its middle a support for the tubing, a stand-pipe, a tubing extending into the Well and having an enlargement at its upper end resting upon'said support, and a reducer connected to the stand-pipe and also to the top of the casing-head and inclosing the upper end of the well-tubing without being directly connected to the same substantially as described. i

2. A casing-head for wells having near its middle on its inner surface a supportingshoulder for the tubing, and a detachable ring sustained on said shoulder, a tubing extending into the well and having an enlargement at its upper end resting upon said ring, and a reducer having a connection for the standpipe above and secured to the top of the casing-head so as to inclose the upper end of the well-tubing without direct connection to the same and give continuous passage-way from the well-tubing to the stand-pipe substantially as shown and described.

3. A casing-head for wells having on its in- ICO ` f g1 f 691,129

11er surface near the middle a. supporbingend of the Well-tubing Without touching the j? shoulder for the tubing and a. gas-discharge same and give continuous passage-Way from outlet below the same in its side, a. detachthe Well-tubing to the stand-pipe substanable ring' sustained on said shoulder, a, tubtially as described.

5 ing extending into the Well and having an enlargement on its upper end resting upon said ring, and a reducer having a connection for Witnesses: the stand-pipe above and secured to the top JOHN MCGARVEY, of the casing-head so as to nclose the upper SAMUEL R. BENNETT.

JOHN W. FRYE.

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