US1462518A - Oil saver - Google Patents

Description

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1,4625@ C. F. RIGBY OIL SAVER Filed Sept. 24, 1919 2 Sheets-Sheet 2 INVENTOW .July 2.4, 1923.

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Patented July 241, i923.

" intatte CLARK F. RFGBY, OF BUTLER, PENNSYLVANIA.

' OIL SAVER.

Application filed September 24, 1919. Seriallllo. 325,987.

T0 all who/mJ t may concern.'

` Be it known that l, CLARK F. RIGBY, a cit-` izen of the United States, and a resident of Butler, in the county of Butler and State of Pennsylvania, have made a new and useful Invention in Oil Savers, of which the following is a specification.

My invention relates to oil savers for oil wells and consists of a device to be attached to the casing head at the well discharge. The main object of my invention is to avoid waste inthe ilow of oil at the mouth of the well and my present invention consists largely of improvements on the oilv savers shown in previous United States Letters Patent Nos. 696,747, 983,314 and 1,152,548 all issued to me. I desire to improve the yconstruction of the packing screw shown inl those patents, also tov facilitate the assembly of the oil saver with the casing head when the well is operating.- My previous savers were subject to leakage'after wearand I desire to overcome that defect in the present construction. Another object of my invention is to adapt my improved casing head closure for application to old casing heads altho my complete new oil saver includes a novel casing head as well as new closure means.

rihe means by which attain these objects are illustrated in the accompanying drawings in which Fig. 1 is a vertical section thru a well discharge which is equipped with my improved oil saver; Fig. 2 is a horizontal section on line 2 2 of Fig. 1; Fig. 3 is a vertical section thru the packing screw; Fig. 4 is a horizontal section thru thel screw handle taken on line 4-4 of Fig, 1 and Fig. 5 is a section similar to Fig. 1 but showing the well closure applied to an old casing head.

Shhown in Fig. v1 is the top section l of the well casing, connected at its upper end toa casing head 2 which is provided with the usual discharge pipes 3. Head 2 is provided nular packing seat 5 which carries a strip 5i of packing material.

Rim 4 and seat 5 enclose andsupport the base 6 of the casing head closure which is provided witha bottom disk 7 detachably secured to base 6 by screws 8. Disk 7 and rim 4 are threaded at 9 to aord means for obtaining a tight union between head 2 and base 6. Threads 9 are interrupted as indicated in Fig. 2,

alternate sectors 'of the I threads being cut away toA form a breechblock or bayonet joint-which permits the closure to be seated in the casing head and by a `partiall revolution to be quickly secured in place.

Base 6 is conically shaped similar to the corresponding parts of the oil savers in the above mentioned patents and this shaping permits the use of a| new base with an old casing head. Such an assembly is illustrated in Fig. 5 in which the closure disk 7 has been removedand the bottom of base 6 rests directly upon packing 5 and the joint is tlghtened by' use of screws 10 thru rim 4.

Base 6 and rim 7 are divided vertically on their diameter and the divided parts of the base are hinged to each other thru jaws 11 on one part and lug 12 on the other part and pin 13. Lug 12 terminates in a thread- 75 ed .shank 14 and jaws 11 terminate in a spring seat 15 surrounding shank 14. A coil spring is seated in part 15of jaws 11 and is adjustably compressed by same and nut 17 on shank 14 and functions to hold the divid- 'S0 ed parts .of the base in contact with each other. It will be understood that pin 13 must wear in jaws 11 and lug 12 before there is opportunity for the action of spring 16. The' opposite sides of the divided base are S5 provided with locking lugs 17 and 18 respectively and a locking bolt 19. When the base is applied to the well cable 20 and casing head 2, and bolt 19 is tightened, the latter cooperates withl spring 16 to forni a tight De joint thruout the meeting surfaces of the divided closure irrespective of wear along same or at the hinge. j

When the divided parts of. base 6 are united they form a vertical, central, threaded chamber `21 which is adapted to receive a packing screw 22. Screw 22 is hollow thruout and formed of two halves as best shown in Figs. 3 and 4 and is provided with a vertical passage 23 thru its stem for the well 10o cable20. Passage23 is recessed at 23a to receive lubricating material. rlhe integral, hollow handles 25 of,l screw 22 also form a chamber for the reception of grease or other lubricant. lt is custonary to lubricate the cable at the packing screw by frequent applicationof an ordinary oiler. This is a wasteful practise and is often neglected when needed, resulting in unnecessary friction and wear on the sliding surface of the 11e cable. The present construction of the screw 22 and its use as a grease receptacle insures continuous lubrication of the cable andalso reduces the amount of material required for the handles and consequently the weight and costY thereof. Packing material 24 is located in chamber 21 and may becompressed to any extent desired by screwing down screw 22.

The casing 'head closures in above' mentioned patents are either applied to the cable before the 'latter is inserted in the well or utilize a removable sector in one side for insertion of the cable into the oil saver. The present arran ment of the hinged halves and the breec-block base permits a rapid assembly Aof the closure with the casing head and the cable. A quickly applied and quickly detachable saver is of prime importance because of the oil saved and the time' v gained by rapid assembly and disassembly.

This isvan operation which may be repeated many times a day, therefore a slight reduction in the time necessary amounts to a large economy in the aggregate. J

1. In a well closure device, a packing chamber, a vertically divided screw mem ber adapted to compress packing in said chamber and having a vertical. passage for a well cable and substantially horizontal, internal recesses for lubricant adjacent said passage.

for each operation- 2. In an oil saver, a vertically divided casing closure,lraving a `central threaded passage contracted to form a packing abutment, hollow complementary T-shaped members together formin a T-shaped packing compressor provide with a through cable passage in communication with the chamber'v formed by the compressor lcross arms. s

3. In an oil saver, a central, vertically divided casing closure formed with a central cable passage, a vertically split screw plug, having a through cable way and hollow cross arms in open communication with said cable way serving as a compressor Jfor said packing and a lubricant reservoir.

4. In an oil saver, a vertically divided casing closure formed with a vertical cable passage, a hinge connecting the divisions of said closure at one side thereof, lockin means for the other side and a T-shape plug threaded into said cable passage having a through cable way provided with a lubricant pocketV and having hollow cross arms forming a lubricant chamber in open communication with said cable way.

In testimony whereof I have hereunto subscribed my hand this 16th day ofSeptember, 1919.

'CLARK F, RIGBY.

packing in said passage and-

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