Патент USA US2146363код для вставки
Feb. 7, 1939.‘ L__ R‘ UNDERWOQD ‘ 2,146,363 PARAFFIN SCRAPER Filed April '50, 1938 m 6 //w /A%/ 13 / AV/ In venior ,ZZZZ. girder-W006? ‘ A iiorneys v Patented Feb. 7, 1939' ' g ' 2,146,363 . 0 UNITED STATES PATENT OFFICE 2,146,363 mam soaaraa Leeman Roy Underwood, Ada, 0kla., assignor of one-half to George L. Thompson and Claude V. Thompson, Ada, Okla. Application April ‘so; 1938, Serial' No. 205334 ' 2 Claims. '(Cl._166—18) This invention appertains to new and. useful portion l8 forming the shank of 'the'splrally improvements in implements whereby theipar- ' formed scraper blade IS. The lower portion‘of a?in in wells can be‘removed in a practical and the sleeve i2 is counterbored to form the shoulder ‘e?icient manner. i ‘ ' ' 20 against which the bearing 2| bears and is in The principal object of the present invention terposed between this bearing 2| and the head is to provide a tool of the rotary scraper type1v portion 22 at the lower end of the shaft 9 is in which will be operated to scrape para?in from a . terposed the ball bearing 23 and additional ball well tubing by the ?ow of oil through the tubing. bearings 24 are interposed between the bottom Still another object of the inventionv is to pro '7 of the head 22 and the upper end of the shank l8. 10 vide a scraper which will be positive acting and A slightly modi?ed form of scraper is shown in not susceptible to the ready development of de Figure 4 generally referred to by numeral 255. fects. ' This scraper consists of an elongated tapering These and other important objects and ad blade structure having the threaded shank vantages of the invention will become apparent and the rectangular-shaped cut out 26 along both 15 to the reader of the following speci?cation. longitudinal edge portions, de?ning serrated In the drawing:—' s edges‘ which will olfer‘ less resistance in cutting Figure 1 represents a side elevational view. through the paraffin. It can be seen, that as the Figure 2 is an enlarged detailed sectional view well ?ows upwardly through the well its ‘e?’ect taken substantially on the line 2—2 of Figure 1. on the spiral ?ange l3 will be to rotate the sleeve 20 Figure 3 is a fragmentary detailed sectional l2 independently of the shaft 9, but carry with a ‘ 5 10 . 15 " . go view taken substantially on the line 3-3 of . it theblade l9 which blade will scrape the par Figure 1. _' ' a?ln from the inside of the tube and allow the - Figure 4 is a side elevational view of a modi same to flow out of the well with the ?owing oil. ?ed form of scraper. - ' r \ ‘ Referring to the drawing wherein‘ like numerals designate like parts, it can be seen that ‘numeral 5 represents a connector unit having the .re While the foregoing speci?cation sets forth the invention in speci?c terms, it is to be understood 25 that numerous changes in the shape,'size and materials may be resorted to without departing frcm the spirit and scope of the invention as duced threaded end 'B'and the internally thread ed bore 1 at its opposite end for receiving the claimed hereinafter. ‘ ' so threaded end portion 8 of the shaft 9. A jam nut Having described the invention, what is claimed 30 III is provided on the threaded portion 8 for en .as new is:-. gagement with the body 5 and a cross pin l‘l pre 1. A para?in scraper comprising a suspended vents self turning of the shaft 5 independently shaft‘,.a sleeve rotatably mounted on the shaft of the body 6. 35 ~ ’ > . A still line of small diameter is preferably used r and having a spiral ?ange extending longitudinal and, connected‘with the body 5 'for suspending ly thereon; and a blade at the lower end of the 35 sleeve, and bearing vmeans between the upper the tool in a well. and lower ends of the sleeve and the said shaft,- , ‘ h , Numeral I 2 represents an elongated sleeve pro vided with a spirally disposed ?ange H at its outer side extending longitudinally thereof. The upper end of this sleeve is internally threaded to receive the knurled plug i4 through which the shaft 9 extends, the sleeve l2 being‘ counterbored l said blade _being of “downwardly reducing size and having serrated longitudinal edge portions. 2. A para?ln 'scraper'comprising a suspended shaft, a sleeve 'rotatably mounted on the shaft and having an outstanding ?anged structure ex tending longitudinally thereon, said sleeve'being as at IE to form a shoulder against which the ‘5 bearing ring Hi can bear and between this bear provided with internal threads at its lower por tion, a scraper blade having a threaded shank lug ring I6 and the plug I4 is interposed the disposed into the threaded lower portion of the sleeve, and bearing means between the sleeveand packing H. The lower end of the sleeve 12 is internally threaded to receive the reduced and threaded end the shaft. ‘ I ‘ LEEMAN ROY UNDERWOOD.