US1685472A - Oil-well tool - Google Patents

Description

Sept. 25, 1928.

G. D. WATSON OIL WELL TOOL Filed Nov. 16, 1925 IN VEN TOR.

Patented Sept. 25, 1928.

UNITED {STATE PATENT OFFICE.

GEORGE n. wA'rsoiv, or TORRANCE, CALIFORNIA.

OIL-WE'LL TOOL.

Application med November 16, 1925. Serial No. 69.323.

This invention relates to oil well tools, and particularly to that class of oil well tool known as a swage. Swages are used wherever pipe has collapsed, due to various causes such as a well hole'caving in and bending inwardly the said pipe. The ordinary way oi: taking out the dents-in a plpc is to use what are called swages, and which usi'ially comprise an down the swage. After the swage has been driven through the collapsed or dented portion of the pipe the 's'wage is then pulled back up the pipe to further assure that the bad place is entirely ironed out. It often occurs that small swages must first be used.to start' the bad place after which larger 'swages are consecutively used until a swage of maximum diameter is easily driven through the pipe. 7

The present invention has for an object the provision of a swage which is easily handled andmay be easily jarred past a bad place ina pipe, and which isso constituted as 'not'to readily wedge in a bad place of the pipe. The wedging of swages in the ordinary form of s'wage often results in a breaking of'the pin of the swage, which of course will result in serious damage to the oil well, because a swage with abroken pin is almost impossible to remove. I v 7 Another object of the invention is'the provision of a swage which may be'e'asily manufactured and which is simple of structure and generally superior.

\Vith the above and other objects in view,

the invention consists in the novel and useful provision, formation, construction, association and relative arrangement of parts, members and features, all as shown in'the drawing, and finally pointed out incl-aims.

In the drawing: v p

Figure 1 is an elevation of one form of swage;

Figure 2 is an elevation of a second form of swage; v Figure 3 shows the action of the second form of swage within a bad casing;

Figure 4 is a cross sectional view on an enlarged scale, and taken on the line 44 of Figure 1; V

Figure 5 is a cross sectional view on the line 5-5. of Fig. 3, the casing being shown m'tull lines; i

a Figure 6 is a fragmentary enlarged plan viewoft-he'method of associating rollers with the ribsof the swage; and, 1

Figure 7 is across sectional view on the line 77 of Figure 6, and on an enlarged scale from theshowing of Fig. 6.

Corresponding parts in all the figures are designated by the same reference characters.

Referring with particularity to the drawing, I have designated tw'oembo'diments of my invention by- A and B. Generally, the

constructional features of both of'said embodiments are the same.

Referring to Figures 1 and 4, the swage includes a body portion a which isfo'rmed adjacent one end with a. shank portion 1' which terminates in a tapered screw-threaded pin 2, the opposite end of the body tapering toa point or approximately a point shown at A sectionof the bodyshows that the body is cruciform in section forming four spaced ribs 4, 5, 6 and 7 extendingfrom a central portion 8. The ribs are in the form of a spiral helix from that zone marked 9 to the point 3, while the portion of said ribs above the zone marked 9 is in the form of a helix. It is to be noted that the spacing between the ribs allows for circulation pas-v sages 10. The ribs extend to the zone of a curved shoulderil which is joined to the shank 1. Carried by each rib is a seriesof spaced anti-friction means 6. The said'anth friction means in the present embodiment takes the form of rollers, the axis of each roller being approximately at right angles to the longitudinalaxis of the body of the swage. Thus, when the swage of the form shown in Figure 1 is inserted within'casing which has an indented portion to be removed, there will be no tendency for the swage to twist or turn due to the spiral arrangement of the arms. The anti-friction means b may be conveniently insert d within the ribs by the method shown in Figures 6 and 7, wherethe rollers from escaping from the bores 12. These pieces l iwill conform in shape to the rib, as shown in Fig. 6, and such pieces may be conveniently secured to the rib by welding or any other well known means.

case that he is aware of considerable difficulty is experienced in placing the rollers within the swage body. I'Vith the present method as just described, it is an easy matter for anymechanic to insert rollers 1n the ribs, the very CODSlJlUCtlOlT of the swage easily per-- I mitting thisto be accomplished. The swage shown in Figures 2 and 3 does not differ essentially from the form shown in Figure 1,

j with the exception that the said ribs 16, 17 and 18 joined to the center section 19, are not spirally arranged with relation to said center section 19. 'Furthermore, two of the ribs 15 and 17. which are diametrically opposite, are

of greater'length than the ribs 16 and 18.

- The two ribs 15 and 17 come to a point, or

' may be made in'the pin and shank of the approximately a point, as shown at 20, and

the two ribs 16and 1S terminate some distance above the said point 20. Each of the said ribs, as is the case of the form A carries anti-friction members 6 and which anti-friction members are secured within said ribs in the same manner as for the form A. In order to provide for circulation or relief of pres sure when the swage is actually used, a bore swage with the bore having branch portions 7 which permit communication between adjacent ribs, as shown in Figure 3 by dotted lines at 21 and 22.

The operation of the swage just described 40 i is. as follows:

In Figure 3 I have shown what may be termed a badxpipe or casing C and which pipe has collapsed or become indented at the zone marked 23. It is perhaps unnecessary to state that swages are used which have a diameter but a fraction of an inch smaller than the diameter of the casing through which it must be passed, and it will be noted in the presentinstance that-the roller members on the swage are contacting with the innersurface of the casing, as

shown at 24c. The ribs 15 and 17 have contacted with the restricted zone 23 of the casing and their tendency will be to wedge apart such collapsed wall of the casing priorto the V ribs 16 andl8 contacting with such collapsed swage shown in Figs. 2 and 3 has successfully operated in the bad pipe or casing, the pipe will assume a form as appears in Figure 5, wherein it Wlll be seen thatdue to the right- ,angled relation between the ribs the pipe is forced outwardly at adjacent ends of each rib, as shown at 25 more thanthe pipe is forced outwardly-in zones intermediate the ribs as shown at 26. The result will be that the pipe is not round. To make the pipe round the tools are drawn up to the surface of the well and the swage of the form shown in Fig.1 is then lowered withinthe casing and this swage when jarred will make the pipe perfectlyround, as would be evident upon an inspection of Fig. 4, for the reason that there will be a zone of contact against thepipe at all portions of the pipe, due to the spiral formation of the ribs.

It is obvious thatvarious minor changes and modifications may be made in practicing the invention, in departure from the particular showing of the drawing, without departing from the truespirit of the invention.

Having thus disclosed my invention, I claim and desire to secure by Letters Patent:

1. Aswage formed with spaced ribs and tapering toward its forward end.

2. A swage formed with'spaced ribs and tapering toward itsforward end, and antifriction means on the outer face of saidribs.

3. A swage formed with spaced spiral ribs and tapering toward its forward end.

4. A swage formed with spaced spiral ribs and tapering toward its forward end, and antifriction means on the outer face of said ribs.

5. A swage formed with ribs extending 'from' end to end, and anti-friction roller-s facilitatej arring of the swage in a well casing.

In testimony whereofI have signed my name to this specification' GEORGE D. WVATSON.

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