US1898311A - Oil saver - Google Patents

Description

Feb. .21, 1933 c pETTlTT 1,898,131 1 OIL SAVER Filed Oct. 15, 1951 5 Sheets-Sheet l Filed Oct. 15, 1931 5 Sheets-Sheet 6 Feb. 21, 1933. Q -r 1,898,311

' OIL SAVER Filed Oct. 15, 1931 5 Sheets-Sheet 4 /3 45 26 AZ 6 6 45 f Frank C. Pc/f/f/ Feb. 21, 1933. Q P T T 1,898,311

OIL SAVER Filed Oct. 15, 1931 5 Sheets- Sh'eet 5 f; f m v firm/r a Pe/Mf Patented Feb. 21, 1933 UNITED STATES PATENT OFFICE FRANK G. PETTITT, DALLAS, TEXAS, ASSIGNOR TO THE GUIBEBSON CORPORATION,

\ 01? DALLAS, TEXAS, A CORPORATION OF DELAWARE OIL SAVER Application filed October 15, 1931.

This invention relates to new and useful 1m rovements 1n 011 savers.

ne object of the invention is to provide sults are obtained.

. cable, but which will shift with the cable,

A particular object of the invention is to provide a floating or shiftable packing mechanism which may be securely gripped to the thus becoming self-adjusting. By this arrangement the pressure of the packing members will be equalized and their wear somewhat reduced.

A further object of the invention is to provide a simplified adjusting means for the packing members, which will also be easy of operation and readily accessible.

Still another object of the invention is to provide an improved housing structure, whereby manufacturing is simplified and the device is made more compact and substantial.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention. The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings'in which an example of the invention is shown, and wherein:

Figure 1 is a side elevation of an oil saver constructed in accordance with the invention,

Figure 2 is an end elevation of the same,

Figure 3 is a viewshowing one of the housing sections in elevation and connecting parts in section,

Figure 4 is a transverse vertical sectional view taken on the line 44 of Figure 2,

Figure 5 is a plan view,

Figure 6 is a. horizontal cross-sectional view taken on the line 6-6 of Figure 1, beFigure 7 is a detail of one of the yoke mem- Figure 8 is a perspective view of the stud,

Figure 9 is a perspective view of the crank,

Figure 10 is a perspective view of one o the followers,

Figure 11 is a perspective view of one of the packing blocks,

Serial No. 568,945.

Figure 12 is a detail of the wedge, and

Figure 13 is a perspective view of one of the lower packing members. I

In the drawings the numeral 10 designates a split housing. The housing includes a removable lower member 10. The members of the housing are provided with outwardly directed ears l1, fastened together by bolts 12 and nuts 13. Suitable packing strips 15 (Figure 3) are interposed between the housing members. The housing includes an upper packing chamber A immediately above the reduced neck 14, and a lower packing chamber B.

- A horizontal annular flange 16 for suitably supporting the device in a casing head eX-' tends from the bottom of the neck. The lower packing chamber will be below the top of the casing head and thus the projection of the device above said head will be greatly reduced.

The lower packing chamber has diametrically opposite guides. 17 (Figure 4) which receive sliding wedge blocks 18 resting against upright shoes 19.- The shoes (Figure 4) have their rear faces flat to receive the blocks and their front faces concaved to embrace opposite sides of a cylindrical packing member orsleeve 20 fitting in the lower chamber.

Adjusting screws 21 (Figure 4) are threaded through the flange at the same angles as the walls of the ui-des 17. Each wedge block 18 (Figure 2% has a key slot 22 for receiving the lower end of one of the screws 21, whereby the blocks are suspended in the guides. By rotating the screws clockwise the blocks are slid downwardly and inwardly, thus displacing the shoes 19 inwardly and compressing the packing sleeve about the cable, rod, or other element which passes through the device. The neck 14 has a reduced opening 23 through ,which the cable C passes and thus said neck forms the top of the lower packing chamber, whereby the sleeve 20 is retained. The upper packing f chamber A has cheek plates24.

One of the essential features of the invention is a floating or self-ad1usting packing mechanism, and in carrying out this feature I provide on the outer side of the cheek plates upper guide lugs 25 and lower guide lugs 25'. A yoke 26 embracing the housing on each side of the cheek plates is freely slidable horizontally in the guide lugs. The yoke includes a pair of right angular members 26.

Each yoke member has an eye 43 in one end receiving a lug 44 formed on the other member at one end thereof. Cotter keys 45 hold the lugs in the eyes. A stud bolt 46 is threaded through one of the members of the yoke. The end of said bolt has a shank 55 working in a slotted keeper 47 on a follower 27. ,A crank 49 is provided with a screw-threaded stem 50 threaded through the opposite end of the other member of the yoke. On the inner end of the stem a reduced shank 53 engages in the slotted keeper 47 of a follower 27 The followers 27 and 27 are provided with upright dovetailed grooves 30 for receiving therein a dovetailed rib 31 (Figure 10) of a rectangular packing block or member 32 (Figure 11). The packing block is formed of rubber, or any material suitable for the purpose, and has a concave vertical face or seat 33 for engaging around the cable. Grease pockets 33 may be provided in the face 33.

When the oil saver is mounted on the cas-' ing'head or other support at the well, the cable, as indicated at C, Figure 6, will extend through the housing 10 and the seats 33 of the packing blocks 32 will be located on each side of said cable. By grasping the handle of the crank 49 the operator may pull the yoke 26 toward him, whereby the lock 32, carried by the follower 27, will be engaged with the cable. Then by rotatlng the crank 49 in a clockwise direction the follower 27 and its packing block will be advanced into the packing chamber A. The result of this will be that the cable will be firmly engaged in the seats 33. It is pointed out that as the cable shifts laterally the floating yoke will permit the packing elements to slide in the chamber A, thereby being self-adjusting.

It is obvious that the inward movement of the followers will clamp the packing blocks about the cable and by the location of the yoke 26 at the center of the followers 27 the inward pressure will be evenly distributed to the packing blocks causing said blocks to automatically adjust themselves for equal gripping of the cable throughout its length.

A guide roller 39 is mounted in a recess 40 of the housing 10 on a shaft 41 secured in said housing. A similar guide roller 39' is mounted in like manner in a recess 40 of the housing, directly opposite and in horizontal alinement with the recess 40. Recesses 23 are .also provided in the housing for the passage therethrough of the cable C which is guided by the rollers into the housing.

After continued use of the oil saver and when the yoke has worked as far out on the stem as is possible, the packing will have been completely worn out and further inward movement of the followers will be prevented. The operator will thus know that the packing must be replaced.

When it becomes necessary to replace the packing 32 it is merely necessary to remove the cotter keys 45 from the ends of the lugs 44 and disengage the yoke. Then the yoke and followers can be removed from the housing and new packing put in place of the worn out packing.

This dissembling of the yoke for replacing the packing can be accomplished quickly and easily without disconnecting the housing. The simplicity of this device, together with theyoke members being duplicates, tends to make for economical construction and operation.

Various changes in the size and shape of the different parts, as well as modificatlons and alterations, may be made within the scope of the appended claims.

Having illustrated and described a preferred form of the invention, what I claim, 1s:

1. In an oil saver, a housing having a vertical packing chamber, compressible packing members slidable transversely in the chamber of said housing, followers engaging said members, a pair of angular members connected together and mounted to slide transversely on the housing, a connection between one of the members and one of the followers, and an adjustable connection between the other member and the other follower.

2. In an oil saver, a housing having a vertical packing chamber, compressible packing members slidable transversely in thechamber of said housing, followers engaging said members, a pair of angular members connected together and mounted to slide transversely on the housing, and means for adj ustably connecting the followers and the angular members.

3. In an oil saver, a housing having a vertical packing chamber, compressible packing members slidable transversely in the chamber of said housing, followers engaging said members, a pair of angular members detachably connected together and mounted to slide transversely on the housing, means for securing one of the followers to one of the angular members, and an adjusting screw mounted in the other angular member and rotatably connected with the other follower.

In testimony whereof I aflix my signature.

FRANK C. PETTITT.

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