US1762211A - Oil saver and packing head - Google Patents

Description

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G. BRADFORD OIL SAVER ANDv PACKING HEAD Filed Dec. 1S),v 1928 u .m I 54,22?

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Patented June 10, 1930 UNITED @STATES WILLIAM PATENT OFFICE G'. BRADFORD, 0F LONG BEACH, CALIFORNIA, ASSIGNOR 0F ONE-FOURTH TO HAROLD P. SHOEBRIDGE AND ONE-FOURTH TO JERRY L. FOTZ OIL-SAVER. am) PACKING HEAD l, Application led December 19, 1928. Serial No.`327,043.

This invention relates to an oil saver and packing head, by means of which the oil which collects on-the outside of the cable or tubing is stripped off and returnedinto the tubing, thereby preventing it from discharging on to the ioor ofthe derrick where 1t 1s lost.

An object of my invention is to provide an oil saver and packing head the stripper portion of which is automatically released by the tools, swabs or the like, as they move upwardly out of the tubing.

A further object is to provide an oil saver of the character stated, the stripper of which can be readily reinserted in position after it is carried out of the head by the swab or Still another object is to provide `an oil saver and packing head which also acts to effectively pack oft' the tubing or cable, there- 'by preventlng leakage around same.

l Other objects, advantages and features of invention may appearlfrom the accompanyf ing drawing, the subjoined detailed description, and the appended claims.

In the drawing: Figure 1 is a view partly in section and partly in elevation, the, section being longitudinal ofthe head.

Fi ure 2 is a Yview similar to Figure 1, showin the tools or swab about to be withdrawn rom the head.

Figure 3 is an enlarged fragmentary view A of one of thelatches.

l Referring more particularly tothe drawing, the numeral 1 indicates a nipple which screws into thertop of the tubing 2. A sleeve 3 screws on to the top offthe ni ple 1 and receives a stripper head 4 which seats 'in the sleeve 3 adjacent the top thereof on a seat 5. A gland 6 screws into the top of sleeve 3 around the head 4 and bears against a fibrous cup 7 which cup effectively seals the space around the head 4, and prevents leakage.'

A rubber packing 8 is positioned in the stripper head 4 and is adapted to closely encircle the tubing, cable, or the like, 9 to remove any oil or other liquid which might adhere to the outside thereof, and also prevents escape of the liquid which is pulled upwardly by the swab, or tools.

vA guide bushing 10 seats on to'p of the packin 8 and a nut 11 screws into the to of the ead around the bushing, thus hol r- .ing the bushing and packing. in position.

The bushing 10 is preferably made of a softA metal which will not wear the tubing or the cable. A soft metal washer 12'! is provided at the lower end of packing 8'to relievel wear on the lower end of said packing.

A vcollar 13 is provided on the lower end of the head 4, the purpose of which will be further described. It will, of course, be .evident that the bore through the'head 4, packing 8 and bushing `10 is of suiiicient diameter to pass the cable or tubing, butpis not of sufficient diameter to ass the tools or swab.

A pluralit o latches 14 are hingedly mounted on t e nipple 1 or sleeve 3, in a ring or the like, said latches extending upwardly from their pivotal point and are each provided with a hook 15 which engages the collar 13 to securely hold the head4 against displacement. A springl bears against each of the latches 14 to yieldably urge the same inwardly.

During the normal operation while the tools are in the tubing, the stripper head 4 is held 'against displacement. During the removal of the tools or swab from the well, the stripper lhead serves to remove the oil or liquid from around the cable. When the tools orswab reach the surface, they engage each of the latches 14 as shown in Figure 2 thus holding them outwardly against the tension of the spring 16. therebv releasing the stripper head 4 and as the upward movement ofthe tools is continued, the head will lift out of the sleeve 3, thus permitting the tools or swab to be removed from the well.

The tools or the like pass out of the sleeve `3 through the enlarged opening 17 at the v rality'of latches engaging said stripper head,

`said latches being adapted to be engaged by the tools during their removal, thus releasing the stripper head, said latches being pivoted adjacent the bottom thereof, and rising above* said pivots,a collar at the lower end of the lstripper head, and hooks on the latches at the topi thereof adapted to engage the collar. 2. An oil saver and packing lread `adapted l to be secured to well tubing comprising a nipple, a sleeve secured to the nipple, astripper head seated in the sleeve, packing in the sleeve around the head, a gland screwed into the top of the sleeve around thephead and bearing against the packing, a plurality of latches engaging said stripper head, said latches being adapted to be engaged by the tools during their removal, thus releasing the stripper head, said latches being pivoted adjacent the'bottom thereof and rising above said pivots, a collar in the lower end of the stripper head and hooks on the latches at the top thereofadapted to engage the collar.

3. An oil saver and packing head adapted tobesecured to well tubin comprising a nipple, a sleeve secured to t e nipple, a stripper head seated in the sleeve, packing in the sleeve around the head, agland screwed into the top of the sleeve around the head and bearing against the packing, Ya plurality of latches vengaging said stripper head, said latches being adapted to be engaged by the toolsy during their removal, thus releasing the stripper head, said'latches being pivoted adjacent the bottomthereof and rlsin above said pivots, a collar in the lower en of the stripper head and hooks on the latches at the top thereof adapted to engage the collar, a rubber'packing in the strip er head, a guide bushing seated on the top o the packing, and a. nut screwed into the top of the stripper head around the bushing and engaging said bushing, thu`s holding the bushing and packing in position.

4. An oil saver and packing head adapted to be secured to well tubing comprising a nipple, a sleeve secured to the nip le, a striper head seated in the sleeve, packing means 1n the sleeve around the strip er head, a plurality of latches engaging said stripper head, said latches being adapted to be engaged by the tools during their removal, thus releasing the stripper head, said'latches -being pivoted adjacent the bottom thereof, and rismg above, said pivots, a collar at .the lower end f the and springs seated in the plugs and bearingv againstthe latches thus urging the latches inwardly. l

5. An oil saver and packing` head adapted to be secured to well tubing comprising a nipple, a sleeve secured to the nipple, a stripper head seated in the sleeve, packing in the sleeve around the head, a gland screwed into thetop of the sleeve around the head and bearing against the packing, a plurality of latches engaging '.said stripper head, said latches being adapted to be engaged by the tools lduring their removal, thus releasin the stripper head, said latches being pivoted adjacent the bottom thereof and rising above said pivots, a collar inthe lower end of the stripper head and hooks on the latches at the' toi thereof adapted to engage the collar, a ru ber packing in the strip er head, a -gu1de bushing seated on the top o the packing, and

a nut screwed into the top of the stripper head around the bushing and engaging said bushing, thus holding the bushing and acking in position, plugs-screwed into the eeve through the wall thereof, and a spring seated in each plug and bearing against one of the latches, thus urging the zlatches inwardly.

In testimony whereof, I aiix my signature.

WILLIAM G. BRADFORD.

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